/* roulang page: index */
:root {
            --y3-charcoal: #1C1E21;
            --y3-acid: #C6F135;
            --y3-acid-hover: #B4E02A;
            --y3-orange: #FF6B3D;
            --y3-warm-white: #F7F5F0;
            --y3-warm-grey: #EDEAE3;
            --y3-border: #E0DDD5;
            --y3-text-primary: #1C1E21;
            --y3-text-secondary: #4A4E52;
            --y3-text-muted: #85898E;
            --y3-text-inverse: #FFFFFF;
            --y3-radius-sm: 8px;
            --y3-radius-md: 12px;
            --y3-radius-lg: 16px;
            --y3-shadow-sm: 0 2px 8px rgba(28,30,33,0.06);
            --y3-shadow-md: 0 8px 24px rgba(28,30,33,0.12);
            --y3-shadow-lg: 0 12px 32px rgba(28,30,33,0.16);
            --y3-font-sans: 'Noto Sans SC', 'Source Han Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
            --y3-font-mono: 'SF Mono', 'Fira Code', 'Cascadia Mono', 'Noto Sans SC', monospace;
            --y3-section-padding: 72px;
            --y3-section-padding-mobile: 48px;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--y3-font-sans);
            font-size: 16px;
            line-height: 1.75;
            color: var(--y3-text-primary);
            background-color: var(--y3-warm-white);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--y3-text-primary);
            text-decoration: none;
            transition: color 0.25s ease, background-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease, border-color 0.25s ease;
        }

        a:hover {
            color: var(--y3-orange);
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
        }

        button:focus,
        input:focus,
        textarea:focus,
        select:focus,
        a:focus {
            outline: 2px solid var(--y3-acid);
            outline-offset: 2px;
        }

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* 顶部信息条 */
        .top-info-bar {
            background-color: var(--y3-charcoal);
            color: rgba(255,255,255,0.82);
            font-size: 13px;
            height: 38px;
            display: flex;
            align-items: center;
            position: relative;
            z-index: 1050;
        }

        .top-info-bar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }

        .top-info-left {
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            color: rgba(255,255,255,0.75);
            letter-spacing: 0.3px;
        }

        .top-info-right {
            display: flex;
            align-items: center;
            gap: 16px;
            white-space: nowrap;
        }

        .top-info-right .lang-switch {
            color: rgba(255,255,255,0.7);
            font-size: 13px;
            cursor: default;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .top-info-right .top-cta {
            color: var(--y3-acid);
            font-weight: 600;
            font-size: 13px;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: color 0.25s ease;
        }

        .top-info-right .top-cta:hover {
            color: var(--y3-acid-hover);
        }

        /* 主导航 */
        .main-nav {
            background-color: #FFFEFC;
            border-bottom: 1px solid var(--y3-border);
            height: 76px;
            display: flex;
            align-items: center;
            position: sticky;
            top: 0;
            z-index: 1040;
            transition: box-shadow 0.3s ease;
        }

        .main-nav .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }

        .brand-logo {
            font-size: 22px;
            font-weight: 800;
            letter-spacing: 0.5px;
            color: var(--y3-charcoal);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }

        .brand-logo .logo-dot {
            display: inline-block;
            width: 10px;
            height: 10px;
            background-color: var(--y3-acid);
            border-radius: 50%;
            margin-right: 2px;
        }

        .brand-logo:hover {
            color: var(--y3-charcoal);
        }

        .nav-menu-desktop {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-menu-desktop li a {
            font-size: 15px;
            font-weight: 500;
            color: var(--y3-text-primary);
            padding: 8px 2px;
            border-bottom: 2px solid transparent;
            white-space: nowrap;
            position: relative;
            transition: color 0.25s ease, border-color 0.25s ease;
        }

        .nav-menu-desktop li a:hover {
            color: var(--y3-charcoal);
            border-bottom-color: var(--y3-acid);
        }

        .nav-menu-desktop li a.active {
            color: var(--y3-charcoal);
            border-bottom-color: var(--y3-acid);
            font-weight: 700;
        }

        .nav-menu-desktop li a.active::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 100%;
            height: 3px;
            background-color: var(--y3-acid);
            border-radius: 0 0 2px 2px;
        }

        .navbar-toggler {
            border: none;
            background: transparent;
            font-size: 24px;
            color: var(--y3-charcoal);
            padding: 4px 8px;
        }

        .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid var(--y3-acid);
            outline-offset: 2px;
        }

        /* 移动端菜单 */
        .mobile-menu-collapse {
            background-color: #FFFEFC;
            border-bottom: 1px solid var(--y3-border);
            padding: 16px 0;
            display: none;
        }

        .mobile-menu-collapse.show {
            display: block;
        }

        .mobile-menu-collapse ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .mobile-menu-collapse li a {
            display: block;
            padding: 12px 24px;
            font-size: 16px;
            font-weight: 500;
            color: var(--y3-text-primary);
            border-left: 3px solid transparent;
            transition: all 0.25s ease;
        }

        .mobile-menu-collapse li a:hover,
        .mobile-menu-collapse li a.active {
            border-left-color: var(--y3-acid);
            background-color: var(--y3-warm-grey);
            color: var(--y3-charcoal);
        }

        /* Hero 区 */
        .hero-section {
            position: relative;
            min-height: 560px;
            display: flex;
            align-items: center;
            background-image: url('/assets/images/2bad027248356d06.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            padding: 64px 0;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(135deg, rgba(28,30,33,0.85) 0%, rgba(28,30,33,0.55) 50%, rgba(28,30,33,0.72) 100%);
            z-index: 1;
        }

        .hero-section .container {
            position: relative;
            z-index: 2;
        }

        .hero-content {
            max-width: 720px;
            color: var(--y3-text-inverse);
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background-color: rgba(198,241,53,0.16);
            color: var(--y3-acid);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 50px;
            border: 1px solid rgba(198,241,53,0.35);
            margin-bottom: 20px;
            letter-spacing: 0.4px;
        }

        .hero-content h1 {
            font-size: 36px;
            font-weight: 800;
            line-height: 1.4;
            margin-bottom: 20px;
            color: #FFFFFF;
            letter-spacing: 0.3px;
        }

        .hero-subtitle {
            font-size: 18px;
            line-height: 1.75;
            color: rgba(255,255,255,0.88);
            margin-bottom: 16px;
            max-width: 620px;
        }

        .hero-desc {
            font-size: 15px;
            line-height: 1.85;
            color: rgba(255,255,255,0.75);
            max-width: 680px;
            margin-bottom: 28px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 32px;
        }

        .btn-y3-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background-color: var(--y3-acid);
            color: var(--y3-charcoal);
            font-weight: 700;
            font-size: 15px;
            padding: 14px 28px;
            border-radius: var(--y3-radius-sm);
            border: none;
            transition: background-color 0.25s ease, box-shadow 0.25s ease, transform 0.2s ease;
            white-space: nowrap;
        }

        .btn-y3-primary:hover {
            background-color: var(--y3-acid-hover);
            color: var(--y3-charcoal);
            box-shadow: var(--y3-shadow-md);
            transform: translateY(-2px);
        }

        .btn-y3-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background-color: transparent;
            color: #FFFFFF;
            font-weight: 600;
            font-size: 15px;
            padding: 14px 28px;
            border-radius: var(--y3-radius-sm);
            border: 1.5px solid rgba(255,255,255,0.55);
            transition: all 0.25s ease;
            white-space: nowrap;
        }

        .btn-y3-secondary:hover {
            background-color: #FFFFFF;
            color: var(--y3-charcoal);
            border-color: #FFFFFF;
            transform: translateY(-2px);
        }

        .hero-trust-strip {
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.2);
        }

        .trust-stat {
            text-align: left;
        }

        .trust-stat .stat-number {
            font-family: var(--y3-font-mono);
            font-size: 26px;
            font-weight: 800;
            color: var(--y3-acid);
            letter-spacing: 0.5px;
        }

        .trust-stat .stat-label {
            font-size: 13px;
            color: rgba(255,255,255,0.7);
            margin-top: 2px;
        }

        /* Section 通用 */
        .section-block {
            padding: var(--y3-section-padding) 0;
        }

        .section-block.bg-warm-grey {
            background-color: var(--y3-warm-grey);
        }

        .section-block.bg-charcoal {
            background-color: var(--y3-charcoal);
            color: #FFFFFF;
        }

        .section-header {
            margin-bottom: 40px;
        }

        .section-header h2 {
            font-size: 28px;
            font-weight: 800;
            line-height: 1.4;
            margin-bottom: 12px;
            letter-spacing: 0.3px;
        }

        .section-header .section-sub {
            font-size: 15px;
            color: var(--y3-text-secondary);
            max-width: 680px;
            line-height: 1.8;
        }

        .bg-charcoal .section-header h2 {
            color: #FFFFFF;
        }

        .bg-charcoal .section-header .section-sub {
            color: rgba(255,255,255,0.7);
        }

        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            color: var(--y3-orange);
            letter-spacing: 0.6px;
            margin-bottom: 8px;
            text-transform: uppercase;
        }

        /* 品牌信任带 */
        .trust-band {
            background-color: #FFFEFC;
            padding: 28px 0;
            border-bottom: 1px solid var(--y3-border);
        }

        .trust-band .container {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }

        .trust-band-label {
            font-size: 13px;
            color: var(--y3-text-muted);
            font-weight: 600;
            white-space: nowrap;
        }

        .trust-band-logos {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 32px;
        }

        .trust-band-logos .fake-logo {
            font-size: 16px;
            font-weight: 700;
            color: #B8B5AD;
            letter-spacing: 0.8px;
            white-space: nowrap;
            opacity: 0.75;
            transition: opacity 0.25s ease;
        }

        .trust-band-logos .fake-logo:hover {
            opacity: 1;
            color: var(--y3-text-secondary);
        }

        /* 品牌介绍区 */
        .brand-intro-card {
            background: #FFFEFC;
            border: 1px solid var(--y3-border);
            border-radius: var(--y3-radius-lg);
            padding: 40px;
            box-shadow: var(--y3-shadow-sm);
        }

        .brand-intro-card h3 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--y3-charcoal);
        }

        .brand-intro-card p {
            color: var(--y3-text-secondary);
            line-height: 1.9;
            margin-bottom: 14px;
        }

        .brand-intro-card p:last-child {
            margin-bottom: 0;
        }

        /* 痛点卡片 */
        .pain-card {
            background: #FFFEFC;
            border: 1px solid var(--y3-border);
            border-radius: var(--y3-radius-md);
            padding: 28px;
            height: 100%;
            box-shadow: var(--y3-shadow-sm);
            transition: box-shadow 0.3s ease, transform 0.3s ease;
        }

        .pain-card:hover {
            box-shadow: var(--y3-shadow-md);
            transform: translateY(-4px);
        }

        .pain-card .pain-icon {
            width: 44px;
            height: 44px;
            background-color: rgba(255,107,61,0.1);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--y3-orange);
            margin-bottom: 16px;
        }

        .pain-card h4 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--y3-charcoal);
        }

        .pain-card p {
            font-size: 14px;
            color: var(--y3-text-secondary);
            line-height: 1.75;
            margin-bottom: 0;
        }

        /* 方案卡片 */
        .solution-card {
            background: #FFFEFC;
            border: 1px solid var(--y3-border);
            border-radius: var(--y3-radius-md);
            padding: 28px;
            height: 100%;
            box-shadow: var(--y3-shadow-sm);
            border-left: 4px solid var(--y3-acid);
            transition: box-shadow 0.3s ease, transform 0.3s ease;
        }

        .solution-card:hover {
            box-shadow: var(--y3-shadow-md);
            transform: translateY(-4px);
            border-left-color: var(--y3-orange);
        }

        .solution-card .solution-icon {
            width: 44px;
            height: 44px;
            background-color: rgba(198,241,53,0.15);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--y3-charcoal);
            margin-bottom: 16px;
        }

        .solution-card h4 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--y3-charcoal);
        }

        .solution-card p {
            font-size: 14px;
            color: var(--y3-text-secondary);
            line-height: 1.75;
            margin-bottom: 0;
        }

        /* 步骤 */
        .step-item {
            display: flex;
            gap: 20px;
            padding: 20px 0;
            border-bottom: 1px dashed var(--y3-border);
        }

        .step-item:last-child {
            border-bottom: none;
        }

        .step-number {
            flex-shrink: 0;
            width: 42px;
            height: 42px;
            background-color: var(--y3-charcoal);
            color: var(--y3-acid);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 18px;
            font-family: var(--y3-font-mono);
        }

        .step-content h4 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--y3-charcoal);
        }

        .step-content p {
            font-size: 14px;
            color: var(--y3-text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* 案例数据面板 */
        .case-panel {
            background: #FFFEFC;
            border: 1px solid var(--y3-border);
            border-radius: var(--y3-radius-lg);
            padding: 32px;
            height: 100%;
            box-shadow: var(--y3-shadow-sm);
            position: relative;
        }

        .case-panel .case-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            color: var(--y3-orange);
            margin-bottom: 12px;
        }

        .case-panel h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--y3-charcoal);
        }

        .case-compare {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-top: 16px;
        }

        .case-compare .compare-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            font-size: 14px;
            padding: 10px 16px;
            border-radius: var(--y3-radius-sm);
        }

        .compare-row.before {
            background-color: rgba(255,107,61,0.08);
            color: var(--y3-text-secondary);
        }

        .compare-row.after {
            background-color: rgba(198,241,53,0.15);
            color: var(--y3-charcoal);
            font-weight: 600;
        }

        .compare-row .compare-value {
            font-family: var(--y3-font-mono);
            font-weight: 700;
            font-size: 18px;
        }

        /* 证言 */
        .testimonial-card {
            background: #FFFEFC;
            border: 1px solid var(--y3-border);
            border-radius: var(--y3-radius-md);
            padding: 28px;
            height: 100%;
            box-shadow: var(--y3-shadow-sm);
            transition: box-shadow 0.3s ease, transform 0.3s ease;
        }

        .testimonial-card:hover {
            box-shadow: var(--y3-shadow-md);
            transform: translateY(-4px);
        }

        .testimonial-quote {
            font-size: 15px;
            line-height: 1.8;
            color: var(--y3-text-secondary);
            margin-bottom: 16px;
            position: relative;
            padding-left: 16px;
            border-left: 3px solid var(--y3-acid);
        }

        .testimonial-author {
            font-size: 14px;
            font-weight: 700;
            color: var(--y3-charcoal);
        }

        .testimonial-role {
            font-size: 13px;
            color: var(--y3-text-muted);
        }

        /* 场景标签 */
        .scenario-tag {
            display: inline-block;
            padding: 10px 20px;
            background-color: #FFFEFC;
            border: 1px solid var(--y3-border);
            border-radius: 50px;
            font-size: 14px;
            font-weight: 600;
            color: var(--y3-text-secondary);
            transition: all 0.25s ease;
            white-space: nowrap;
        }

        .scenario-tag:hover {
            border-color: var(--y3-acid);
            background-color: rgba(198,241,53,0.08);
            color: var(--y3-charcoal);
            transform: translateY(-2px);
        }

        /* 资讯卡片 */
        .news-card {
            background: #FFFEFC;
            border: 1px solid var(--y3-border);
            border-radius: var(--y3-radius-md);
            overflow: hidden;
            height: 100%;
            box-shadow: var(--y3-shadow-sm);
            transition: box-shadow 0.3s ease, transform 0.3s ease;
        }

        .news-card:hover {
            box-shadow: var(--y3-shadow-md);
            transform: translateY(-4px);
        }

        .news-card .news-img {
            aspect-ratio: 16/10;
            background-color: var(--y3-warm-grey);
            overflow: hidden;
        }

        .news-card .news-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .news-card .news-body {
            padding: 20px;
        }

        .news-card .news-date {
            font-size: 12px;
            color: var(--y3-text-muted);
            margin-bottom: 8px;
            letter-spacing: 0.3px;
        }

        .news-card h4 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.5;
        }

        .news-card h4 a {
            color: var(--y3-charcoal);
            transition: color 0.25s ease;
        }

        .news-card h4 a:hover {
            color: var(--y3-orange);
        }

        .news-card .news-summary {
            font-size: 14px;
            color: var(--y3-text-secondary);
            line-height: 1.7;
            margin-bottom: 12px;
        }

        .news-card .news-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .news-tags .badge-tag {
            font-size: 12px;
            padding: 4px 10px;
            background-color: var(--y3-warm-grey);
            border-radius: 50px;
            color: var(--y3-text-secondary);
            font-weight: 500;
        }

        /* 数据指标（深色区块） */
        .metric-panel {
            text-align: center;
            padding: 24px 16px;
            border-radius: var(--y3-radius-md);
            background-color: rgba(255,255,255,0.05);
            border: 1px solid rgba(255,255,255,0.1);
            height: 100%;
            transition: background-color 0.3s ease;
        }

        .metric-panel:hover {
            background-color: rgba(255,255,255,0.08);
        }

        .metric-panel .metric-number {
            font-family: var(--y3-font-mono);
            font-size: 32px;
            font-weight: 800;
            color: var(--y3-acid);
            letter-spacing: 0.5px;
            line-height: 1.3;
        }

        .metric-panel .metric-label {
            font-size: 14px;
            color: rgba(255,255,255,0.72);
            margin-top: 6px;
            line-height: 1.6;
        }

        /* 功能深潜 */
        .feature-deep-card {
            background: #FFFEFC;
            border: 1px solid var(--y3-border);
            border-radius: var(--y3-radius-md);
            padding: 28px;
            height: 100%;
            box-shadow: var(--y3-shadow-sm);
            transition: box-shadow 0.3s ease, transform 0.3s ease;
        }

        .feature-deep-card:hover {
            box-shadow: var(--y3-shadow-md);
            transform: translateY(-4px);
        }

        .feature-deep-card .feature-icon {
            font-size: 24px;
            color: var(--y3-orange);
            margin-bottom: 14px;
        }

        .feature-deep-card h4 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--y3-charcoal);
        }

        .feature-deep-card p {
            font-size: 14px;
            color: var(--y3-text-secondary);
            line-height: 1.75;
            margin-bottom: 0;
        }

        /* 兼容环境 */
        .compat-item {
            display: flex;
            align-items: center;
            gap: 12px;
            background: #FFFEFC;
            border: 1px solid var(--y3-border);
            border-radius: var(--y3-radius-sm);
            padding: 16px 20px;
            font-size: 14px;
            font-weight: 600;
            color: var(--y3-text-secondary);
            transition: all 0.25s ease;
        }

        .compat-item:hover {
            border-color: var(--y3-acid);
            color: var(--y3-charcoal);
            box-shadow: var(--y3-shadow-sm);
        }

        .compat-item .compat-icon {
            font-size: 18px;
            color: var(--y3-orange);
        }

        /* 安全合规 */
        .security-card {
            background: #FFFEFC;
            border: 1px solid var(--y3-border);
            border-radius: var(--y3-radius-md);
            padding: 24px;
            height: 100%;
            text-align: center;
            box-shadow: var(--y3-shadow-sm);
        }

        .security-card .security-icon {
            font-size: 22px;
            color: var(--y3-charcoal);
            margin-bottom: 10px;
        }

        .security-card h4 {
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--y3-charcoal);
        }

        .security-card p {
            font-size: 13px;
            color: var(--y3-text-muted);
            line-height: 1.6;
            margin-bottom: 0;
        }

        /* 时间线 */
        .timeline {
            position: relative;
            padding-left: 28px;
        }

        .timeline::before {
            content: '';
            position: absolute;
            left: 8px;
            top: 4px;
            bottom: 4px;
            width: 2px;
            background-color: var(--y3-border);
        }

        .timeline-item {
            position: relative;
            padding-bottom: 24px;
        }

        .timeline-item:last-child {
            padding-bottom: 0;
        }

        .timeline-item::before {
            content: '';
            position: absolute;
            left: -26px;
            top: 6px;
            width: 12px;
            height: 12px;
            background-color: var(--y3-acid);
            border-radius: 50%;
            border: 3px solid var(--y3-charcoal);
        }

        .timeline-item .tl-version {
            font-size: 13px;
            font-weight: 700;
            color: var(--y3-orange);
            font-family: var(--y3-font-mono);
        }

        .timeline-item .tl-date {
            font-size: 13px;
            color: var(--y3-text-muted);
            margin-left: 8px;
        }

        .timeline-item p {
            font-size: 14px;
            color: var(--y3-text-secondary);
            margin-top: 6px;
            margin-bottom: 0;
        }

        /* FAQ */
        .faq-section {
            background-color: var(--y3-warm-grey);
        }

        .faq-section .accordion-item {
            background-color: #FFFEFC;
            border: 1px solid var(--y3-border);
            border-radius: var(--y3-radius-md);
            margin-bottom: 12px;
            overflow: hidden;
        }

        .faq-section .accordion-button {
            background-color: #FFFEFC;
            font-size: 16px;
            font-weight: 700;
            color: var(--y3-charcoal);
            padding: 18px 24px;
            border: none;
            box-shadow: none;
            border-radius: var(--y3-radius-md);
        }

        .faq-section .accordion-button:not(.collapsed) {
            background-color: #FFFEFC;
            color: var(--y3-charcoal);
            box-shadow: none;
            border-bottom: 1px solid var(--y3-border);
            border-radius: var(--y3-radius-md) var(--y3-radius-md) 0 0;
        }

        .faq-section .accordion-button:focus {
            outline: 2px solid var(--y3-acid);
            outline-offset: -2px;
            box-shadow: none;
        }

        .faq-section .accordion-button::after {
            filter: brightness(0.5);
        }

        .faq-section .accordion-body {
            font-size: 15px;
            line-height: 1.8;
            color: var(--y3-text-secondary);
            padding: 18px 24px;
        }

        /* 资源卡片 */
        .resource-card {
            background: #FFFEFC;
            border: 1px solid var(--y3-border);
            border-radius: var(--y3-radius-md);
            padding: 24px;
            height: 100%;
            box-shadow: var(--y3-shadow-sm);
            transition: box-shadow 0.3s ease, transform 0.3s ease;
        }

        .resource-card:hover {
            box-shadow: var(--y3-shadow-md);
            transform: translateY(-4px);
        }

        .resource-card .resource-icon {
            font-size: 20px;
            color: var(--y3-orange);
            margin-bottom: 10px;
        }

        .resource-card h4 {
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--y3-charcoal);
        }

        .resource-card p {
            font-size: 13px;
            color: var(--y3-text-secondary);
            line-height: 1.6;
            margin-bottom: 0;
        }

        /* 订阅表单 */
        .subscribe-form .form-control {
            border: 1px solid var(--y3-border);
            border-radius: var(--y3-radius-sm);
            padding: 14px 20px;
            font-size: 15px;
            color: var(--y3-text-primary);
            background-color: #FFFEFC;
            transition: border-color 0.25s ease, box-shadow 0.25s ease;
        }

        .subscribe-form .form-control:focus {
            border-color: var(--y3-acid);
            box-shadow: 0 0 0 3px rgba(198,241,53,0.2);
            outline: none;
        }

        .subscribe-form .btn-subscribe {
            background-color: var(--y3-charcoal);
            color: var(--y3-acid);
            font-weight: 700;
            font-size: 15px;
            padding: 14px 28px;
            border-radius: var(--y3-radius-sm);
            border: none;
            white-space: nowrap;
            transition: background-color 0.25s ease, transform 0.2s ease;
        }

        .subscribe-form .btn-subscribe:hover {
            background-color: #2E3035;
            transform: translateY(-2px);
        }

        /* CTA 收束区 */
        .cta-final {
            background-color: var(--y3-charcoal);
            padding: 64px 0;
            text-align: center;
            color: #FFFFFF;
        }

        .cta-final h2 {
            font-size: 30px;
            font-weight: 800;
            margin-bottom: 16px;
            color: #FFFFFF;
        }

        .cta-final p {
            font-size: 16px;
            color: rgba(255,255,255,0.7);
            max-width: 560px;
            margin: 0 auto 28px;
            line-height: 1.8;
        }

        .cta-final .btn-white-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background-color: #FFFFFF;
            color: var(--y3-charcoal);
            font-weight: 700;
            font-size: 15px;
            padding: 14px 28px;
            border-radius: var(--y3-radius-sm);
            border: none;
            transition: background-color 0.25s ease, transform 0.2s ease;
            white-space: nowrap;
        }

        .cta-final .btn-white-outline:hover {
            background-color: var(--y3-acid);
            color: var(--y3-charcoal);
            transform: translateY(-2px);
        }

        .cta-final .cta-link-secondary {
            color: rgba(255,255,255,0.7);
            font-size: 15px;
            font-weight: 600;
            margin-left: 20px;
            transition: color 0.25s ease;
        }

        .cta-final .cta-link-secondary:hover {
            color: var(--y3-acid);
        }

        /* 底部品牌带 */
        .footer-band {
            background-color: #16171A;
            padding: 20px 0;
            border-top: 1px solid rgba(255,255,255,0.08);
        }

        .footer-band .container {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
        }

        .footer-slogan {
            font-size: 14px;
            color: rgba(255,255,255,0.6);
            letter-spacing: 0.3px;
        }

        .footer-slogan strong {
            color: var(--y3-acid);
            font-weight: 700;
        }

        /* 页脚 */
        .site-footer {
            background-color: var(--y3-charcoal);
            color: rgba(255,255,255,0.75);
            padding: 48px 0 0;
        }

        .site-footer .footer-brand {
            font-size: 20px;
            font-weight: 800;
            color: #FFFFFF;
            margin-bottom: 12px;
        }

        .site-footer .footer-desc {
            font-size: 14px;
            color: rgba(255,255,255,0.55);
            line-height: 1.7;
            max-width: 320px;
        }

        .site-footer .footer-heading {
            font-size: 14px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }

        .site-footer .footer-links {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .site-footer .footer-links li {
            margin-bottom: 10px;
        }

        .site-footer .footer-links a {
            font-size: 14px;
            color: rgba(255,255,255,0.55);
            transition: color 0.25s ease;
        }

        .site-footer .footer-links a:hover {
            color: var(--y3-acid);
        }

        .footer-bottom {
            background-color: #121315;
            padding: 20px 0;
            font-size: 13px;
            color: rgba(255,255,255,0.45);
            border-top: 1px solid rgba(255,255,255,0.08);
            margin-top: 40px;
        }

        .footer-bottom .container {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
        }

        .footer-bottom a {
            color: rgba(255,255,255,0.5);
            transition: color 0.25s ease;
        }

        .footer-bottom a:hover {
            color: var(--y3-acid);
        }

        /* 响应式 */
        @media (max-width: 991.98px) {
            :root {
                --y3-section-padding: 56px;
            }
            .hero-section {
                min-height: 480px;
                padding: 48px 0;
            }
            .hero-content h1 {
                font-size: 30px;
            }
            .hero-subtitle {
                font-size: 16px;
            }
            .main-nav .container {
                gap: 16px;
            }
            .nav-menu-desktop {
                gap: 18px;
            }
            .nav-menu-desktop li a {
                font-size: 14px;
            }
        }

        @media (max-width: 767.98px) {
            :root {
                --y3-section-padding: 48px;
            }
            .top-info-bar {
                height: 34px;
                font-size: 12px;
            }
            .main-nav {
                height: 64px;
            }
            .brand-logo {
                font-size: 18px;
            }
            .hero-section {
                min-height: 360px;
                padding: 36px 0;
            }
            .hero-content h1 {
                font-size: 24px;
                line-height: 1.45;
            }
            .hero-subtitle {
                font-size: 15px;
            }
            .hero-desc {
                font-size: 14px;
            }
            .hero-actions {
                gap: 10px;
            }
            .btn-y3-primary,
            .btn-y3-secondary {
                padding: 12px 20px;
                font-size: 14px;
            }
            .hero-trust-strip {
                gap: 20px;
            }
            .trust-stat .stat-number {
                font-size: 20px;
            }
            .section-header h2 {
                font-size: 22px;
            }
            .brand-intro-card {
                padding: 24px;
            }
            .step-item {
                gap: 14px;
            }
            .step-number {
                width: 36px;
                height: 36px;
                font-size: 15px;
            }
            .case-panel {
                padding: 22px;
            }
            .metric-panel .metric-number {
                font-size: 26px;
            }
            .timeline {
                padding-left: 20px;
            }
            .timeline-item::before {
                left: -19px;
                width: 10px;
                height: 10px;
            }
            .footer-bottom .container,
            .footer-band .container {
                flex-direction: column;
                text-align: center;
                align-items: center;
            }
            .site-footer {
                padding: 36px 0 0;
            }
            .footer-bottom {
                margin-top: 28px;
            }
            .nav-menu-desktop {
                display: none;
            }
            .mobile-menu-collapse {
                display: none;
            }
            .mobile-menu-collapse.show {
                display: block;
            }
            .navbar-toggler {
                display: block;
            }
        }

        @media (max-width: 575.98px) {
            :root {
                --y3-section-padding: 40px;
            }
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .hero-section {
                min-height: 320px;
                padding: 32px 0;
            }
            .hero-content h1 {
                font-size: 20px;
            }
            .hero-subtitle {
                font-size: 14px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .btn-y3-primary,
            .btn-y3-secondary {
                width: 100%;
                justify-content: center;
            }
            .hero-trust-strip {
                gap: 16px;
                flex-wrap: wrap;
            }
            .trust-stat .stat-number {
                font-size: 18px;
            }
            .section-header h2 {
                font-size: 20px;
            }
            .brand-intro-card {
                padding: 20px;
            }
            .brand-intro-card h3 {
                font-size: 18px;
            }
            .pain-card,
            .solution-card,
            .testimonial-card,
            .feature-deep-card {
                padding: 20px;
            }
            .case-panel {
                padding: 18px;
            }
            .metric-panel .metric-number {
                font-size: 22px;
            }
            .cta-final h2 {
                font-size: 22px;
            }
        }

        @media (max-width: 400px) {
            .brand-logo {
                font-size: 16px;
            }
            .hero-content h1 {
                font-size: 18px;
            }
            .section-header h2 {
                font-size: 18px;
            }
        }

        /* 桌面端 navbar-toggler 隐藏 */
        @media (min-width: 768px) {
            .navbar-toggler {
                display: none;
            }
        }

/* roulang page: category2 */
:root {
            --y3-charcoal: #1C1E21;
            --y3-acid: #C6F135;
            --y3-acid-hover: #B4E02A;
            --y3-orange: #FF6B3D;
            --y3-warm-white: #F7F5F0;
            --y3-warm-grey: #EDEAE3;
            --y3-border: #E0DDD5;
            --y3-text-primary: #1C1E21;
            --y3-text-secondary: #4A4E52;
            --y3-text-muted: #85898E;
            --y3-text-inverse: #FFFFFF;
            --y3-radius-sm: 8px;
            --y3-radius-md: 12px;
            --y3-radius-lg: 16px;
            --y3-shadow-sm: 0 2px 8px rgba(28, 30, 33, 0.06);
            --y3-shadow-md: 0 8px 24px rgba(28, 30, 33, 0.12);
            --y3-shadow-lg: 0 12px 32px rgba(28, 30, 33, 0.16);
            --y3-font-sans: 'Noto Sans SC', 'Source Han Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
            --y3-font-mono: 'SF Mono', 'Fira Code', 'Cascadia Mono', 'Noto Sans SC', monospace;
            --y3-section-padding: 72px;
            --y3-section-padding-mobile: 48px;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--y3-font-sans);
            font-size: 16px;
            line-height: 1.75;
            color: var(--y3-text-primary);
            background-color: var(--y3-warm-white);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--y3-text-primary);
            text-decoration: none;
            transition: color 0.25s ease, background-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease, border-color 0.25s ease;
        }

        a:hover {
            color: var(--y3-orange);
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
        }

        button:focus,
        input:focus,
        textarea:focus,
        select:focus,
        a:focus {
            outline: 2px solid var(--y3-acid);
            outline-offset: 2px;
        }

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

        .top-info-bar {
            background-color: var(--y3-charcoal);
            color: #E8E6E1;
            height: 40px;
            display: flex;
            align-items: center;
            font-size: 13px;
            position: relative;
            z-index: 1050;
        }

        .top-info-bar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }

        .top-info-left {
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .top-info-left i {
            color: var(--y3-acid);
            font-size: 13px;
        }

        .top-info-right {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-shrink: 0;
        }

        .top-info-right .top-cta {
            color: var(--y3-acid);
            font-weight: 600;
            font-size: 13px;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: color 0.25s ease;
        }

        .top-info-right .top-cta:hover {
            color: var(--y3-acid-hover);
        }

        .top-info-right .lang-switch {
            color: #B8B5AE;
            font-size: 13px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .top-info-right .lang-switch span {
            cursor: default;
        }

        .top-info-right .lang-switch span.active {
            color: #FFFFFF;
            font-weight: 600;
        }

        .main-nav {
            background-color: #FFFEFC;
            border-bottom: 1px solid var(--y3-border);
            height: 76px;
            display: flex;
            align-items: center;
            position: sticky;
            top: 0;
            z-index: 1040;
            transition: box-shadow 0.3s ease;
        }

        .main-nav .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }

        .brand-logo {
            font-size: 22px;
            font-weight: 800;
            letter-spacing: 0.5px;
            color: var(--y3-charcoal);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }

        .brand-logo .logo-dot {
            display: inline-block;
            width: 10px;
            height: 10px;
            background-color: var(--y3-acid);
            border-radius: 50%;
            margin-right: 2px;
            flex-shrink: 0;
        }

        .brand-logo:hover {
            color: var(--y3-charcoal);
        }

        .nav-menu-desktop {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-menu-desktop li a {
            font-size: 15px;
            font-weight: 500;
            color: var(--y3-text-primary);
            padding: 8px 2px;
            border-bottom: 2px solid transparent;
            white-space: nowrap;
            position: relative;
            transition: color 0.25s ease, border-color 0.25s ease;
        }

        .nav-menu-desktop li a:hover {
            color: var(--y3-charcoal);
            border-bottom-color: var(--y3-acid);
        }

        .nav-menu-desktop li a.active {
            color: var(--y3-charcoal);
            border-bottom-color: var(--y3-acid);
            font-weight: 700;
        }

        .nav-menu-desktop li a.active::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 100%;
            height: 3px;
            background-color: var(--y3-acid);
            border-radius: 0 0 2px 2px;
        }

        .navbar-toggler {
            border: none;
            background: transparent;
            font-size: 24px;
            color: var(--y3-charcoal);
            padding: 4px 8px;
            display: none;
        }

        .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid var(--y3-acid);
            outline-offset: 2px;
        }

        .mobile-menu-collapse {
            background-color: #FFFEFC;
            border-bottom: 1px solid var(--y3-border);
            padding: 16px 0;
            display: none;
        }

        .mobile-menu-collapse.show {
            display: block;
        }

        .mobile-menu-collapse ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .mobile-menu-collapse ul li a {
            display: block;
            padding: 12px 24px;
            font-size: 16px;
            font-weight: 500;
            color: var(--y3-text-primary);
            border-left: 3px solid transparent;
            transition: color 0.25s ease, border-color 0.25s ease, background-color 0.25s ease;
        }

        .mobile-menu-collapse ul li a:hover,
        .mobile-menu-collapse ul li a.active {
            color: var(--y3-charcoal);
            background-color: var(--y3-warm-grey);
            border-left-color: var(--y3-acid);
        }

        .category-hero {
            background-color: #FFFEFC;
            border-bottom: 1px solid var(--y3-border);
            padding: 40px 0 32px;
        }

        .breadcrumb-wrapper {
            margin-bottom: 16px;
            font-size: 14px;
            color: var(--y3-text-muted);
        }

        .breadcrumb-wrapper a {
            color: var(--y3-text-muted);
            transition: color 0.25s ease;
        }

        .breadcrumb-wrapper a:hover {
            color: var(--y3-orange);
        }

        .breadcrumb-wrapper .separator {
            margin: 0 8px;
            color: var(--y3-border);
        }

        .breadcrumb-wrapper .current {
            color: var(--y3-text-primary);
            font-weight: 600;
        }

        .category-hero h1 {
            font-size: 36px;
            font-weight: 800;
            line-height: 1.4;
            color: var(--y3-charcoal);
            margin-bottom: 12px;
        }

        .category-hero .category-desc {
            font-size: 17px;
            color: var(--y3-text-secondary);
            max-width: 760px;
            line-height: 1.8;
            margin-bottom: 0;
        }

        .section-block {
            padding: var(--y3-section-padding) 0;
            position: relative;
        }

        .section-block-alt {
            background-color: var(--y3-warm-grey);
        }

        .section-block-dark {
            background-color: var(--y3-charcoal);
            color: #FFFFFF;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 700;
            color: var(--y3-orange);
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 12px;
        }

        .section-label::before {
            content: '';
            display: inline-block;
            width: 24px;
            height: 2px;
            background-color: var(--y3-orange);
        }

        .section-title {
            font-size: 28px;
            font-weight: 800;
            color: var(--y3-charcoal);
            line-height: 1.45;
            margin-bottom: 16px;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--y3-text-secondary);
            max-width: 680px;
            line-height: 1.8;
            margin-bottom: 0;
        }

        .section-block-dark .section-title {
            color: #FFFFFF;
        }

        .section-block-dark .section-subtitle {
            color: #B8B5AE;
        }

        .solution-card {
            background: #FFFFFF;
            border: 1px solid var(--y3-border);
            border-radius: var(--y3-radius-md);
            padding: 24px;
            height: 100%;
            transition: box-shadow 0.3s ease, transform 0.3s ease, border-color 0.3s ease;
            display: flex;
            flex-direction: column;
        }

        .solution-card:hover {
            box-shadow: var(--y3-shadow-md);
            transform: translateY(-4px);
            border-color: var(--y3-acid);
        }

        .solution-card .card-img-wrapper {
            position: relative;
            border-radius: var(--y3-radius-sm);
            overflow: hidden;
            margin-bottom: 16px;
            aspect-ratio: 16/10;
            background-color: var(--y3-warm-grey);
        }

        .solution-card .card-img-wrapper img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .solution-card:hover .card-img-wrapper img {
            transform: scale(1.04);
        }

        .solution-card .card-img-wrapper .overlay-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background-color: var(--y3-charcoal);
            color: var(--y3-acid);
            font-size: 12px;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: 20px;
            letter-spacing: 0.5px;
        }

        .solution-card h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--y3-charcoal);
            margin-bottom: 8px;
            line-height: 1.5;
        }

        .solution-card .card-summary {
            font-size: 15px;
            color: var(--y3-text-secondary);
            line-height: 1.7;
            margin-bottom: 12px;
            flex-grow: 1;
        }

        .solution-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            font-size: 13px;
            color: var(--y3-text-muted);
            border-top: 1px solid var(--y3-border);
            padding-top: 12px;
            margin-top: auto;
        }

        .solution-card .card-meta .tags {
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
        }

        .solution-card .card-meta .tag {
            background-color: var(--y3-warm-grey);
            color: var(--y3-text-secondary);
            padding: 2px 10px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 500;
            transition: background-color 0.25s ease, color 0.25s ease;
        }

        .solution-card:hover .card-meta .tag {
            background-color: var(--y3-acid);
            color: var(--y3-charcoal);
        }

        .card-meta .date {
            white-space: nowrap;
        }

        .stats-band {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .stat-item {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--y3-radius-md);
            padding: 24px 20px;
            text-align: center;
            transition: background-color 0.3s ease, transform 0.3s ease;
        }

        .stat-item:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-3px);
        }

        .stat-number {
            font-family: var(--y3-font-mono);
            font-size: 36px;
            font-weight: 800;
            color: var(--y3-acid);
            line-height: 1.2;
            margin-bottom: 6px;
        }

        .stat-label {
            font-size: 14px;
            color: #B8B5AE;
            font-weight: 500;
        }

        .scenario-item {
            display: flex;
            align-items: flex-start;
            gap: 20px;
            padding: 20px 0;
            border-bottom: 1px solid var(--y3-border);
        }

        .scenario-item:last-child {
            border-bottom: none;
        }

        .scenario-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--y3-radius-sm);
            background-color: var(--y3-acid);
            color: var(--y3-charcoal);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            flex-shrink: 0;
        }

        .scenario-content h4 {
            font-size: 18px;
            font-weight: 700;
            color: var(--y3-charcoal);
            margin-bottom: 4px;
        }

        .scenario-content p {
            font-size: 15px;
            color: var(--y3-text-secondary);
            margin-bottom: 0;
            line-height: 1.7;
        }

        .resource-item {
            background: #FFFFFF;
            border: 1px solid var(--y3-border);
            border-radius: var(--y3-radius-sm);
            padding: 20px;
            height: 100%;
            transition: box-shadow 0.3s ease, border-color 0.3s ease;
            display: block;
        }

        .resource-item:hover {
            box-shadow: var(--y3-shadow-sm);
            border-color: var(--y3-acid);
            color: var(--y3-text-primary);
        }

        .resource-item .resource-icon {
            font-size: 22px;
            color: var(--y3-orange);
            margin-bottom: 10px;
        }

        .resource-item h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--y3-charcoal);
            margin-bottom: 6px;
        }

        .resource-item p {
            font-size: 14px;
            color: var(--y3-text-muted);
            margin-bottom: 0;
            line-height: 1.6;
        }

        .btn-primary-custom {
            background-color: var(--y3-acid);
            color: var(--y3-charcoal);
            border: none;
            padding: 14px 28px;
            border-radius: var(--y3-radius-sm);
            font-size: 15px;
            font-weight: 700;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            cursor: pointer;
            transition: background-color 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease;
            outline: none;
        }

        .btn-primary-custom:hover {
            background-color: var(--y3-acid-hover);
            color: var(--y3-charcoal);
            box-shadow: var(--y3-shadow-md);
            transform: translateY(-2px);
        }

        .btn-secondary-custom {
            background-color: transparent;
            color: var(--y3-charcoal);
            border: 1.5px solid var(--y3-charcoal);
            padding: 13px 27px;
            border-radius: var(--y3-radius-sm);
            font-size: 15px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            cursor: pointer;
            transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
            outline: none;
        }

        .btn-secondary-custom:hover {
            background-color: var(--y3-charcoal);
            color: #FFFFFF;
            border-color: var(--y3-charcoal);
        }

        .btn-white-custom {
            background-color: #FFFFFF;
            color: var(--y3-charcoal);
            border: none;
            padding: 14px 28px;
            border-radius: var(--y3-radius-sm);
            font-size: 15px;
            font-weight: 700;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            cursor: pointer;
            transition: background-color 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease;
            outline: none;
        }

        .btn-white-custom:hover {
            background-color: var(--y3-acid);
            color: var(--y3-charcoal);
            box-shadow: var(--y3-shadow-md);
            transform: translateY(-2px);
        }

        .faq-item {
            background: #FFFFFF;
            border: 1px solid var(--y3-border);
            border-radius: var(--y3-radius-sm);
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color 0.3s ease, box-shadow 0.3s ease;
        }

        .faq-item:hover {
            border-color: var(--y3-acid);
            box-shadow: var(--y3-shadow-sm);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 16px 20px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 700;
            color: var(--y3-charcoal);
            background: #FFFFFF;
            border: none;
            width: 100%;
            text-align: left;
        }

        .faq-question i {
            color: var(--y3-orange);
            font-size: 16px;
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }

        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            padding: 0 20px;
        }

        .faq-item.open .faq-answer {
            max-height: 500px;
            padding: 0 20px 16px;
        }

        .faq-answer p {
            font-size: 15px;
            color: var(--y3-text-secondary);
            line-height: 1.8;
            margin-bottom: 0;
        }

        .newsletter-box {
            background-color: #FFFFFF;
            border: 1px solid var(--y3-border);
            border-radius: var(--y3-radius-lg);
            padding: 32px;
            box-shadow: var(--y3-shadow-sm);
        }

        .newsletter-box .form-control {
            background-color: var(--y3-warm-white);
            border: 1px solid var(--y3-border);
            border-radius: var(--y3-radius-sm);
            padding: 14px 16px;
            font-size: 15px;
            color: var(--y3-text-primary);
            transition: border-color 0.3s ease, box-shadow 0.3s ease;
        }

        .newsletter-box .form-control:focus {
            border-color: var(--y3-acid);
            box-shadow: 0 0 0 3px rgba(198, 241, 53, 0.2);
            outline: none;
        }

        .newsletter-box .form-control::placeholder {
            color: var(--y3-text-muted);
            font-size: 14px;
        }

        .site-footer {
            background-color: var(--y3-charcoal);
            color: #B8B5AE;
            padding-top: 56px;
            border-top: 4px solid var(--y3-acid);
        }

        .site-footer .footer-brand {
            font-size: 24px;
            font-weight: 800;
            color: #FFFFFF;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .site-footer .footer-brand .logo-dot {
            width: 8px;
            height: 8px;
            background-color: var(--y3-acid);
            border-radius: 50%;
            display: inline-block;
        }

        .site-footer .footer-desc {
            font-size: 14px;
            line-height: 1.8;
            color: #B8B5AE;
            max-width: 320px;
            margin-bottom: 0;
        }

        .site-footer .footer-heading {
            font-size: 15px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 14px;
        }

        .site-footer .footer-links {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .site-footer .footer-links li {
            margin-bottom: 8px;
        }

        .site-footer .footer-links a {
            color: #B8B5AE;
            font-size: 14px;
            transition: color 0.25s ease;
        }

        .site-footer .footer-links a:hover {
            color: var(--y3-acid);
        }

        .site-footer .footer-bottom {
            margin-top: 40px;
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding: 20px 0;
        }

        .site-footer .footer-bottom .container {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            font-size: 13px;
            color: #85898E;
        }

        .site-footer .footer-bottom a {
            color: #85898E;
            transition: color 0.25s ease;
        }

        .site-footer .footer-bottom a:hover {
            color: var(--y3-acid);
        }

        @media (max-width: 991px) {
            .nav-menu-desktop {
                display: none;
            }

            .navbar-toggler {
                display: inline-flex;
                align-items: center;
                justify-content: center;
            }

            .category-hero h1 {
                font-size: 30px;
            }

            .stats-band {
                grid-template-columns: repeat(2, 1fr);
            }

            .stat-number {
                font-size: 30px;
            }
        }

        @media (max-width: 767px) {
            :root {
                --y3-section-padding: 48px;
            }

            .top-info-bar {
                height: 36px;
                font-size: 12px;
            }

            .top-info-left span {
                display: none;
            }

            .top-info-right {
                gap: 12px;
            }

            .main-nav {
                height: 64px;
            }

            .category-hero {
                padding: 24px 0 20px;
            }

            .category-hero h1 {
                font-size: 24px;
                line-height: 1.5;
            }

            .category-hero .category-desc {
                font-size: 15px;
            }

            .section-title {
                font-size: 22px;
            }

            .stats-band {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }

            .stat-number {
                font-size: 26px;
            }

            .stat-item {
                padding: 18px 14px;
            }

            .solution-card {
                padding: 16px;
            }

            .solution-card h3 {
                font-size: 18px;
            }

            .newsletter-box {
                padding: 20px;
            }

            .site-footer .footer-bottom .container {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
        }

        @media (max-width: 575px) {
            .stats-band {
                grid-template-columns: 1fr;
            }

            .category-hero h1 {
                font-size: 20px;
            }

            .section-title {
                font-size: 20px;
            }

            .scenario-item {
                flex-direction: column;
                gap: 12px;
            }

            .btn-primary-custom,
            .btn-secondary-custom,
            .btn-white-custom {
                padding: 12px 20px;
                font-size: 14px;
                width: 100%;
                justify-content: center;
            }
        }

/* roulang page: category1 */
:root {
            --y3-charcoal: #1C1E21;
            --y3-acid: #C6F135;
            --y3-acid-hover: #B4E02A;
            --y3-orange: #FF6B3D;
            --y3-warm-white: #F7F5F0;
            --y3-warm-grey: #EDEAE3;
            --y3-border: #E0DDD5;
            --y3-text-primary: #1C1E21;
            --y3-text-secondary: #4A4E52;
            --y3-text-muted: #85898E;
            --y3-text-inverse: #FFFFFF;
            --y3-radius-sm: 8px;
            --y3-radius-md: 12px;
            --y3-radius-lg: 16px;
            --y3-shadow-sm: 0 2px 8px rgba(28,30,33,0.06);
            --y3-shadow-md: 0 8px 24px rgba(28,30,33,0.12);
            --y3-shadow-lg: 0 12px 32px rgba(28,30,33,0.16);
            --y3-font-sans: 'Noto Sans SC', 'Source Han Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
            --y3-font-mono: 'SF Mono', 'Fira Code', 'Cascadia Mono', 'Noto Sans SC', monospace;
            --y3-section-padding: 72px;
            --y3-section-padding-mobile: 48px;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--y3-font-sans);
            font-size: 16px;
            line-height: 1.75;
            color: var(--y3-text-primary);
            background-color: var(--y3-warm-white);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--y3-text-primary);
            text-decoration: none;
            transition: color 0.25s ease, background-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease, border-color 0.25s ease;
        }
        a:hover {
            color: var(--y3-orange);
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
        }
        button:focus,
        input:focus,
        textarea:focus,
        select:focus,
        a:focus {
            outline: 2px solid var(--y3-acid);
            outline-offset: 2px;
        }
        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }
        .top-info-bar {
            background-color: var(--y3-charcoal);
            color: rgba(255,255,255,0.8);
            font-size: 13px;
            height: 38px;
            display: flex;
            align-items: center;
        }
        .top-info-bar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .top-info-left {
            display: flex;
            align-items: center;
            gap: 8px;
            min-width: 0;
        }
        .top-info-left span {
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .top-info-right {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-shrink: 0;
        }
        .top-info-right .top-cta {
            color: var(--y3-acid);
            font-weight: 600;
            font-size: 13px;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: color 0.25s ease;
            white-space: nowrap;
        }
        .top-info-right .top-cta:hover {
            color: var(--y3-acid-hover);
        }
        .top-info-right .region-hint {
            color: rgba(255,255,255,0.6);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            white-space: nowrap;
        }
        .main-nav {
            background-color: #FFFEFC;
            border-bottom: 1px solid var(--y3-border);
            height: 76px;
            display: flex;
            align-items: center;
            position: sticky;
            top: 0;
            z-index: 1040;
            transition: box-shadow 0.3s ease;
        }
        .main-nav .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }
        .brand-logo {
            font-size: 22px;
            font-weight: 800;
            letter-spacing: 0.5px;
            color: var(--y3-charcoal);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }
        .brand-logo .logo-dot {
            display: inline-block;
            width: 10px;
            height: 10px;
            background-color: var(--y3-acid);
            border-radius: 50%;
            margin-right: 2px;
        }
        .brand-logo:hover {
            color: var(--y3-charcoal);
        }
        .nav-menu-desktop {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-menu-desktop li a {
            font-size: 15px;
            font-weight: 500;
            color: var(--y3-text-primary);
            padding: 8px 2px;
            border-bottom: 2px solid transparent;
            white-space: nowrap;
            position: relative;
            transition: color 0.25s ease, border-color 0.25s ease;
        }
        .nav-menu-desktop li a:hover {
            color: var(--y3-charcoal);
            border-bottom-color: var(--y3-acid);
        }
        .nav-menu-desktop li a.active {
            color: var(--y3-charcoal);
            border-bottom-color: var(--y3-acid);
            font-weight: 700;
        }
        .nav-menu-desktop li a.active::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 100%;
            height: 3px;
            background-color: var(--y3-acid);
            border-radius: 0 0 2px 2px;
        }
        .navbar-toggler {
            border: none;
            background: transparent;
            font-size: 24px;
            color: var(--y3-charcoal);
            padding: 4px 8px;
            display: none;
        }
        .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid var(--y3-acid);
            outline-offset: 2px;
        }
        .mobile-menu-collapse {
            background-color: #FFFEFC;
            border-bottom: 1px solid var(--y3-border);
            padding: 16px 0;
            display: none;
        }
        .mobile-menu-collapse.show {
            display: block;
        }
        .mobile-menu-collapse ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .mobile-menu-collapse ul li a {
            display: block;
            padding: 12px 24px;
            font-size: 15px;
            font-weight: 500;
            color: var(--y3-text-primary);
            border-bottom: 1px solid var(--y3-border);
            transition: background-color 0.25s ease, color 0.25s ease;
        }
        .mobile-menu-collapse ul li a:hover,
        .mobile-menu-collapse ul li a.active {
            background-color: var(--y3-warm-grey);
            color: var(--y3-charcoal);
        }
        .mobile-menu-collapse ul li a.active {
            font-weight: 700;
            border-left: 3px solid var(--y3-acid);
        }
        .breadcrumb-section {
            background-color: var(--y3-warm-white);
            padding: 32px 0 8px;
        }
        .breadcrumb-section .breadcrumb {
            margin: 0;
            padding: 0;
            background: transparent;
            font-size: 14px;
            color: var(--y3-text-muted);
        }
        .breadcrumb-section .breadcrumb a {
            color: var(--y3-text-muted);
            transition: color 0.25s ease;
        }
        .breadcrumb-section .breadcrumb a:hover {
            color: var(--y3-orange);
        }
        .breadcrumb-section .breadcrumb .breadcrumb-item.active {
            color: var(--y3-text-secondary);
            font-weight: 500;
        }
        .breadcrumb-section .breadcrumb-item + .breadcrumb-item::before {
            content: "/";
            color: var(--y3-text-muted);
            padding: 0 8px;
        }
        .category-hero {
            background-color: var(--y3-warm-white);
            padding: 32px 0 40px;
            border-bottom: 1px solid var(--y3-border);
        }
        .category-hero h1 {
            font-size: 36px;
            font-weight: 800;
            line-height: 1.4;
            color: var(--y3-charcoal);
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .category-hero .category-desc {
            font-size: 16px;
            line-height: 1.85;
            color: var(--y3-text-secondary);
            max-width: 780px;
            margin-bottom: 24px;
        }
        .category-hero .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
        }
        .category-hero .badge-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background-color: var(--y3-warm-grey);
            color: var(--y3-text-secondary);
            font-size: 13px;
            font-weight: 500;
            padding: 6px 14px;
            border-radius: 20px;
            border: 1px solid var(--y3-border);
        }
        .category-hero .badge-tag i {
            color: var(--y3-orange);
            font-size: 12px;
        }
        .section-block {
            padding: var(--y3-section-padding) 0;
        }
        .section-block-alt {
            background-color: var(--y3-warm-grey);
            padding: var(--y3-section-padding) 0;
            border-top: 1px solid var(--y3-border);
            border-bottom: 1px solid var(--y3-border);
        }
        .section-block-dark {
            background-color: var(--y3-charcoal);
            color: var(--y3-text-inverse);
            padding: var(--y3-section-padding) 0;
        }
        .section-block-dark .section-title {
            color: var(--y3-text-inverse);
        }
        .section-block-dark .section-subtitle {
            color: rgba(255,255,255,0.7);
        }
        .section-title {
            font-size: 26px;
            font-weight: 800;
            line-height: 1.4;
            color: var(--y3-charcoal);
            margin-bottom: 12px;
            letter-spacing: 0.3px;
        }
        .section-subtitle {
            font-size: 16px;
            line-height: 1.8;
            color: var(--y3-text-secondary);
            margin-bottom: 32px;
            max-width: 720px;
        }
        .tool-card {
            background-color: #FFFEFC;
            border: 1px solid var(--y3-border);
            border-radius: var(--y3-radius-md);
            overflow: hidden;
            box-shadow: var(--y3-shadow-sm);
            transition: box-shadow 0.3s ease, transform 0.3s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .tool-card:hover {
            box-shadow: var(--y3-shadow-md);
            transform: translateY(-4px);
        }
        .tool-card .card-image {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background-color: var(--y3-warm-grey);
        }
        .tool-card .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .tool-card:hover .card-image img {
            transform: scale(1.04);
        }
        .tool-card .card-body {
            padding: 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .tool-card .tool-tag {
            display: inline-flex;
            flex-wrap: wrap;
            gap: 6px;
            margin-bottom: 12px;
        }
        .tool-card .tool-tag .tag-item {
            display: inline-block;
            font-size: 12px;
            font-weight: 500;
            padding: 3px 10px;
            border-radius: 4px;
            background-color: var(--y3-warm-grey);
            color: var(--y3-text-secondary);
            border: 1px solid var(--y3-border);
        }
        .tool-card .tool-tag .tag-item.tag-accent {
            background-color: rgba(198,241,53,0.22);
            color: #3D4A00;
            border-color: rgba(198,241,53,0.5);
        }
        .tool-card .card-title {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.5;
            color: var(--y3-charcoal);
            margin-bottom: 8px;
        }
        .tool-card .card-text {
            font-size: 14px;
            line-height: 1.75;
            color: var(--y3-text-secondary);
            margin-bottom: 16px;
            flex: 1;
        }
        .tool-card .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--y3-text-muted);
            padding-top: 16px;
            border-top: 1px solid var(--y3-border);
        }
        .tool-card .card-meta .meta-date {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .tool-card .card-meta .meta-rating {
            color: var(--y3-orange);
            font-weight: 600;
        }
        .category-entry-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 20px;
        }
        .category-entry-card {
            background-color: #FFFEFC;
            border: 1px solid var(--y3-border);
            border-radius: var(--y3-radius-md);
            padding: 24px;
            box-shadow: var(--y3-shadow-sm);
            transition: box-shadow 0.3s ease, transform 0.3s ease;
            display: flex;
            align-items: flex-start;
            gap: 16px;
            height: 100%;
        }
        .category-entry-card:hover {
            box-shadow: var(--y3-shadow-md);
            transform: translateY(-3px);
        }
        .category-entry-card .entry-icon {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            border-radius: var(--y3-radius-sm);
            background-color: rgba(198,241,53,0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--y3-charcoal);
            font-size: 20px;
        }
        .category-entry-card .entry-content h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--y3-charcoal);
            margin-bottom: 6px;
        }
        .category-entry-card .entry-content p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--y3-text-secondary);
            margin-bottom: 0;
        }
        .category-entry-card .entry-link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 13px;
            font-weight: 600;
            color: var(--y3-charcoal);
            margin-top: 10px;
            transition: color 0.25s ease;
        }
        .category-entry-card .entry-link:hover {
            color: var(--y3-orange);
        }
        .stats-panel {
            background-color: var(--y3-charcoal);
            border-radius: var(--y3-radius-lg);
            padding: 40px;
            color: var(--y3-text-inverse);
        }
        .stats-panel .stat-item {
            text-align: center;
            padding: 16px;
        }
        .stats-panel .stat-number {
            font-family: var(--y3-font-mono);
            font-size: 36px;
            font-weight: 700;
            color: var(--y3-acid);
            margin-bottom: 8px;
            line-height: 1.2;
        }
        .stats-panel .stat-label {
            font-size: 14px;
            color: rgba(255,255,255,0.7);
            line-height: 1.6;
        }
        .resource-card {
            background-color: #FFFEFC;
            border: 1px solid var(--y3-border);
            border-radius: var(--y3-radius-md);
            padding: 24px;
            box-shadow: var(--y3-shadow-sm);
            transition: box-shadow 0.3s ease, transform 0.3s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .resource-card:hover {
            box-shadow: var(--y3-shadow-md);
            transform: translateY(-3px);
        }
        .resource-card .resource-icon {
            width: 40px;
            height: 40px;
            border-radius: var(--y3-radius-sm);
            background-color: rgba(255,107,61,0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--y3-orange);
            font-size: 18px;
            margin-bottom: 16px;
        }
        .resource-card h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--y3-charcoal);
            margin-bottom: 8px;
        }
        .resource-card p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--y3-text-secondary);
            margin-bottom: 0;
            flex: 1;
        }
        .resource-card .resource-link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 13px;
            font-weight: 600;
            color: var(--y3-charcoal);
            margin-top: 14px;
        }
        .resource-card .resource-link:hover {
            color: var(--y3-orange);
        }
        .faq-accordion .accordion-item {
            border: 1px solid var(--y3-border);
            border-radius: var(--y3-radius-sm);
            margin-bottom: 12px;
            background-color: #FFFEFC;
            overflow: hidden;
            box-shadow: var(--y3-shadow-sm);
        }
        .faq-accordion .accordion-button {
            font-size: 15px;
            font-weight: 600;
            color: var(--y3-charcoal);
            background-color: #FFFEFC;
            padding: 18px 24px;
            border: none;
            box-shadow: none;
            border-radius: var(--y3-radius-sm);
        }
        .faq-accordion .accordion-button:not(.collapsed) {
            background-color: rgba(198,241,53,0.12);
            color: var(--y3-charcoal);
            box-shadow: none;
        }
        .faq-accordion .accordion-button:focus {
            box-shadow: none;
            outline: 2px solid var(--y3-acid);
            outline-offset: 2px;
        }
        .faq-accordion .accordion-button::after {
            background-size: 16px;
            background-color: transparent;
        }
        .faq-accordion .accordion-body {
            font-size: 14px;
            line-height: 1.8;
            color: var(--y3-text-secondary);
            padding: 16px 24px 20px;
            background-color: #FFFEFC;
        }
        .subscribe-section {
            background-color: var(--y3-warm-grey);
            border-top: 1px solid var(--y3-border);
            border-bottom: 1px solid var(--y3-border);
            padding: var(--y3-section-padding) 0;
        }
        .subscribe-form-wrap {
            background-color: #FFFEFC;
            border: 1px solid var(--y3-border);
            border-radius: var(--y3-radius-lg);
            padding: 40px;
            box-shadow: var(--y3-shadow-sm);
        }
        .subscribe-form-wrap .form-label {
            font-size: 14px;
            font-weight: 600;
            color: var(--y3-charcoal);
            margin-bottom: 8px;
        }
        .subscribe-form-wrap .form-control {
            border: 1px solid var(--y3-border);
            border-radius: var(--y3-radius-sm);
            padding: 12px 16px;
            font-size: 15px;
            color: var(--y3-charcoal);
            background-color: var(--y3-warm-white);
            transition: border-color 0.25s ease, box-shadow 0.25s ease;
        }
        .subscribe-form-wrap .form-control:focus {
            border-color: var(--y3-acid);
            box-shadow: 0 0 0 3px rgba(198,241,53,0.25);
        }
        .subscribe-form-wrap .btn-primary-y3 {
            background-color: var(--y3-acid);
            color: var(--y3-charcoal);
            border: none;
            padding: 12px 28px;
            font-size: 15px;
            font-weight: 700;
            border-radius: var(--y3-radius-sm);
            transition: background-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
            white-space: nowrap;
        }
        .subscribe-form-wrap .btn-primary-y3:hover {
            background-color: var(--y3-acid-hover);
            box-shadow: var(--y3-shadow-md);
            transform: translateY(-2px);
            color: var(--y3-charcoal);
        }
        .subscribe-form-wrap .btn-primary-y3:active {
            transform: translateY(0);
            box-shadow: var(--y3-shadow-sm);
        }
        .brand-bar-section {
            background-color: var(--y3-warm-white);
            padding: 40px 0;
            border-top: 1px solid var(--y3-border);
        }
        .brand-bar-content {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
        }
        .brand-bar-content .brand-slogan {
            font-size: 18px;
            font-weight: 700;
            color: var(--y3-charcoal);
        }
        .brand-bar-content .brand-slogan span {
            color: var(--y3-orange);
        }
        .brand-bar-content .brand-desc {
            font-size: 14px;
            color: var(--y3-text-muted);
            max-width: 360px;
        }
        .site-footer {
            background-color: var(--y3-charcoal);
            color: rgba(255,255,255,0.8);
            padding: 56px 0 0;
            margin-top: 0;
        }
        .site-footer .footer-brand {
            font-size: 22px;
            font-weight: 800;
            color: #FFFFFF;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .site-footer .footer-brand .logo-dot {
            display: inline-block;
            width: 10px;
            height: 10px;
            background-color: var(--y3-acid);
            border-radius: 50%;
        }
        .site-footer .footer-desc {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255,255,255,0.6);
            max-width: 340px;
        }
        .site-footer .footer-heading {
            font-size: 14px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .site-footer .footer-links {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .site-footer .footer-links li {
            margin-bottom: 10px;
        }
        .site-footer .footer-links li a {
            font-size: 14px;
            color: rgba(255,255,255,0.6);
            transition: color 0.25s ease, padding-left 0.25s ease;
            display: inline-block;
        }
        .site-footer .footer-links li a:hover {
            color: var(--y3-acid);
            padding-left: 4px;
        }
        .footer-bottom {
            background-color: rgba(0,0,0,0.25);
            padding: 20px 0;
            margin-top: 40px;
        }
        .footer-bottom .container {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 8px;
            font-size: 13px;
            color: rgba(255,255,255,0.5);
        }
        .footer-bottom a {
            color: rgba(255,255,255,0.6);
            transition: color 0.25s ease;
        }
        .footer-bottom a:hover {
            color: var(--y3-acid);
        }
        @media (max-width: 1199px) {
            .nav-menu-desktop {
                gap: 20px;
            }
            .nav-menu-desktop li a {
                font-size: 14px;
            }
            .category-hero h1 {
                font-size: 32px;
            }
            .stats-panel {
                padding: 32px 24px;
            }
            .stats-panel .stat-number {
                font-size: 30px;
            }
        }
        @media (max-width: 991px) {
            .navbar-toggler {
                display: block;
            }
            .nav-menu-desktop {
                display: none;
            }
            .main-nav {
                height: 68px;
            }
            .category-hero h1 {
                font-size: 28px;
            }
            .section-title {
                font-size: 22px;
            }
        }
        @media (max-width: 767px) {
            :root {
                --y3-section-padding: 48px;
            }
            body {
                font-size: 15px;
                line-height: 1.7;
            }
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .top-info-bar {
                height: 36px;
                font-size: 12px;
            }
            .top-info-right .region-hint {
                display: none;
            }
            .main-nav {
                height: 64px;
            }
            .brand-logo {
                font-size: 19px;
            }
            .category-hero {
                padding: 24px 0 32px;
            }
            .category-hero h1 {
                font-size: 24px;
                line-height: 1.45;
            }
            .category-hero .category-desc {
                font-size: 15px;
                line-height: 1.7;
            }
            .section-title {
                font-size: 20px;
                line-height: 1.45;
            }
            .section-subtitle {
                font-size: 14px;
                line-height: 1.7;
                margin-bottom: 24px;
            }
            .tool-card .card-body {
                padding: 18px;
            }
            .category-entry-card {
                padding: 18px;
            }
            .stats-panel {
                padding: 24px 16px;
                border-radius: var(--y3-radius-md);
            }
            .stats-panel .stat-number {
                font-size: 26px;
            }
            .subscribe-form-wrap {
                padding: 24px 18px;
            }
            .brand-bar-content {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
            .site-footer {
                padding: 40px 0 0;
            }
            .footer-bottom .container {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }
        }
        @media (max-width: 520px) {
            .top-info-left span {
                font-size: 11px;
            }
            .top-info-right .top-cta {
                font-size: 12px;
            }
            .category-hero h1 {
                font-size: 22px;
            }
            .section-title {
                font-size: 18px;
            }
            .tool-card .card-title {
                font-size: 16px;
            }
            .stats-panel .stat-number {
                font-size: 22px;
            }
        }

/* roulang page: category3 */
:root {
            --y3-charcoal: #1C1E21;
            --y3-acid: #C6F135;
            --y3-acid-hover: #B4E02A;
            --y3-orange: #FF6B3D;
            --y3-warm-white: #F7F5F0;
            --y3-warm-grey: #EDEAE3;
            --y3-border: #E0DDD5;
            --y3-text-primary: #1C1E21;
            --y3-text-secondary: #4A4E52;
            --y3-text-muted: #85898E;
            --y3-text-inverse: #FFFFFF;
            --y3-radius-sm: 8px;
            --y3-radius-md: 12px;
            --y3-radius-lg: 16px;
            --y3-shadow-sm: 0 2px 8px rgba(28,30,33,0.06);
            --y3-shadow-md: 0 8px 24px rgba(28,30,33,0.12);
            --y3-shadow-lg: 0 12px 32px rgba(28,30,33,0.16);
            --y3-font-sans: 'Noto Sans SC', 'Source Han Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
            --y3-font-mono: 'SF Mono', 'Fira Code', 'Cascadia Mono', 'Noto Sans SC', monospace;
            --y3-section-padding: 64px;
            --y3-section-padding-mobile: 40px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--y3-font-sans);
            font-size: 16px;
            line-height: 1.75;
            color: var(--y3-text-primary);
            background-color: var(--y3-warm-white);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--y3-text-primary);
            text-decoration: none;
            transition: color 0.25s ease, background-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease, border-color 0.25s ease;
        }
        a:hover {
            color: var(--y3-orange);
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
        }
        button:focus,
        input:focus,
        textarea:focus,
        select:focus,
        a:focus {
            outline: 2px solid var(--y3-acid);
            outline-offset: 2px;
        }
        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }
        section {
            padding: var(--y3-section-padding) 0;
        }
        .section-header {
            margin-bottom: 36px;
        }
        .section-header h2 {
            font-size: 26px;
            font-weight: 800;
            line-height: 1.45;
            color: var(--y3-text-primary);
            letter-spacing: 0.3px;
        }
        .section-header .section-subtitle {
            font-size: 15px;
            color: var(--y3-text-secondary);
            margin-top: 8px;
            max-width: 680px;
            line-height: 1.75;
        }
        .section-header .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--y3-orange);
            background: rgba(255,107,61,0.08);
            padding: 4px 12px;
            border-radius: 20px;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }
        .bg-warm-grey {
            background-color: var(--y3-warm-grey);
        }
        .bg-charcoal {
            background-color: var(--y3-charcoal);
            color: var(--y3-text-inverse);
        }
        .bg-charcoal .section-header h2 {
            color: var(--y3-text-inverse);
        }
        .bg-charcoal .section-header .section-subtitle {
            color: rgba(255,255,255,0.7);
        }
        .text-acid {
            color: var(--y3-acid);
        }
        .text-orange {
            color: var(--y3-orange);
        }
        /* 按钮 */
        .btn-y3 {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background-color: var(--y3-acid);
            color: var(--y3-charcoal);
            font-weight: 600;
            font-size: 15px;
            padding: 14px 28px;
            border-radius: var(--y3-radius-sm);
            border: none;
            transition: background-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
            white-space: nowrap;
        }
        .btn-y3:hover {
            background-color: var(--y3-acid-hover);
            color: var(--y3-charcoal);
            box-shadow: var(--y3-shadow-md);
            transform: translateY(-2px);
        }
        .btn-y3-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background-color: transparent;
            color: var(--y3-charcoal);
            font-weight: 600;
            font-size: 15px;
            padding: 13px 27px;
            border-radius: var(--y3-radius-sm);
            border: 1.5px solid var(--y3-charcoal);
            transition: background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
            white-space: nowrap;
        }
        .btn-y3-outline:hover {
            background-color: var(--y3-charcoal);
            color: var(--y3-text-inverse);
            border-color: var(--y3-charcoal);
            box-shadow: var(--y3-shadow-sm);
        }
        .btn-y3-inverse {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background-color: #FFFFFF;
            color: var(--y3-charcoal);
            font-weight: 600;
            font-size: 15px;
            padding: 14px 28px;
            border-radius: var(--y3-radius-sm);
            border: none;
            transition: background-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
            white-space: nowrap;
        }
        .btn-y3-inverse:hover {
            background-color: var(--y3-acid);
            color: var(--y3-charcoal);
            box-shadow: var(--y3-shadow-md);
            transform: translateY(-2px);
        }
        /* 顶部信息条 */
        .top-info-bar {
            background-color: var(--y3-charcoal);
            color: rgba(255,255,255,0.8);
            font-size: 13px;
            padding: 8px 0;
            min-height: 38px;
            display: flex;
            align-items: center;
        }
        .top-info-bar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .top-info-left {
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .top-info-left .tagline-icon {
            color: var(--y3-acid);
            font-size: 14px;
        }
        .top-info-right {
            display: flex;
            align-items: center;
            gap: 20px;
            white-space: nowrap;
        }
        .top-info-right .top-cta {
            color: var(--y3-acid);
            font-weight: 600;
            font-size: 13px;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: color 0.25s ease;
        }
        .top-info-right .top-cta:hover {
            color: var(--y3-acid-hover);
        }
        .top-info-right .lang-trigger {
            color: rgba(255,255,255,0.7);
            font-size: 13px;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            cursor: default;
        }
        /* 主导航 */
        .main-nav {
            background-color: #FFFEFC;
            border-bottom: 1px solid var(--y3-border);
            height: 76px;
            display: flex;
            align-items: center;
            position: sticky;
            top: 0;
            z-index: 1040;
            transition: box-shadow 0.3s ease;
        }
        .main-nav.scrolled {
            box-shadow: 0 4px 16px rgba(28,30,33,0.1);
        }
        .main-nav .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }
        .brand-logo {
            font-size: 22px;
            font-weight: 800;
            letter-spacing: 0.5px;
            color: var(--y3-charcoal);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }
        .brand-logo .logo-dot {
            display: inline-block;
            width: 10px;
            height: 10px;
            background-color: var(--y3-acid);
            border-radius: 50%;
            margin-right: 2px;
            flex-shrink: 0;
        }
        .brand-logo:hover {
            color: var(--y3-charcoal);
        }
        .nav-menu-desktop {
            display: flex;
            align-items: center;
            gap: 22px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-menu-desktop li a {
            font-size: 15px;
            font-weight: 500;
            color: var(--y3-text-primary);
            padding: 8px 2px;
            border-bottom: 2px solid transparent;
            white-space: nowrap;
            position: relative;
            transition: color 0.25s ease, border-color 0.25s ease;
        }
        .nav-menu-desktop li a:hover {
            color: var(--y3-charcoal);
            border-bottom-color: var(--y3-acid);
        }
        .nav-menu-desktop li a.active {
            color: var(--y3-charcoal);
            border-bottom-color: var(--y3-acid);
            font-weight: 700;
        }
        .nav-menu-desktop li a.active::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 100%;
            height: 3px;
            background-color: var(--y3-acid);
            border-radius: 0 0 2px 2px;
        }
        .navbar-toggler {
            border: none;
            background: transparent;
            font-size: 24px;
            color: var(--y3-charcoal);
            padding: 4px 8px;
        }
        .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid var(--y3-acid);
            outline-offset: 2px;
        }
        /* 移动端菜单 */
        .mobile-menu-collapse {
            background-color: #FFFEFC;
            border-bottom: 1px solid var(--y3-border);
            padding: 16px 0;
            display: none;
        }
        .mobile-menu-collapse.show {
            display: block;
        }
        .mobile-menu-collapse ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .mobile-menu-collapse li a {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 8px;
            font-size: 16px;
            font-weight: 500;
            color: var(--y3-text-primary);
            border-bottom: 1px solid var(--y3-border);
            transition: background-color 0.25s ease, color 0.25s ease;
        }
        .mobile-menu-collapse li:last-child a {
            border-bottom: none;
        }
        .mobile-menu-collapse li a:hover {
            background-color: var(--y3-warm-grey);
            color: var(--y3-charcoal);
        }
        .mobile-menu-collapse li a.active {
            color: var(--y3-charcoal);
            font-weight: 700;
            background-color: rgba(198,241,53,0.1);
        }
        /* Hero分类区 */
        .category-hero {
            background-color: var(--y3-warm-white);
            padding: 48px 0 36px;
            border-bottom: 1px solid var(--y3-border);
        }
        .breadcrumb-y3 {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--y3-text-muted);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .breadcrumb-y3 a {
            color: var(--y3-text-muted);
            transition: color 0.25s ease;
        }
        .breadcrumb-y3 a:hover {
            color: var(--y3-orange);
        }
        .breadcrumb-y3 .separator {
            color: var(--y3-border);
        }
        .breadcrumb-y3 .current {
            color: var(--y3-text-primary);
            font-weight: 600;
        }
        .category-hero h1 {
            font-size: 34px;
            font-weight: 800;
            line-height: 1.4;
            color: var(--y3-text-primary);
            letter-spacing: 0.3px;
            margin-bottom: 16px;
        }
        .category-hero .hero-desc {
            font-size: 16px;
            color: var(--y3-text-secondary);
            max-width: 720px;
            line-height: 1.8;
            margin-bottom: 24px;
        }
        .hero-stats-row {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            padding-top: 16px;
            border-top: 1px solid var(--y3-border);
        }
        .hero-stat-item {
            display: flex;
            flex-direction: column;
        }
        .hero-stat-item .stat-number {
            font-size: 28px;
            font-weight: 800;
            color: var(--y3-charcoal);
            font-family: var(--y3-font-mono);
            line-height: 1.2;
        }
        .hero-stat-item .stat-label {
            font-size: 13px;
            color: var(--y3-text-muted);
            margin-top: 4px;
        }
        /* 资源卡片 */
        .resource-card {
            background-color: #FFFEFC;
            border: 1px solid var(--y3-border);
            border-radius: var(--y3-radius-md);
            overflow: hidden;
            transition: box-shadow 0.3s ease, transform 0.3s ease, border-color 0.3s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .resource-card:hover {
            box-shadow: var(--y3-shadow-md);
            transform: translateY(-4px);
            border-color: rgba(198,241,53,0.5);
        }
        .resource-card .card-img-wrap {
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background-color: var(--y3-warm-grey);
            position: relative;
        }
        .resource-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .resource-card:hover .card-img-wrap img {
            transform: scale(1.05);
        }
        .resource-card .card-img-wrap .img-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background-color: rgba(28,30,33,0.85);
            color: #FFFFFF;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 20px;
            letter-spacing: 0.5px;
        }
        .resource-card .card-body {
            padding: 20px 20px 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .resource-card .card-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--y3-text-primary);
            line-height: 1.5;
            margin-bottom: 8px;
            transition: color 0.25s ease;
        }
        .resource-card:hover .card-title {
            color: var(--y3-orange);
        }
        .resource-card .card-summary {
            font-size: 14px;
            color: var(--y3-text-secondary);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 12px;
        }
        .resource-card .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--y3-text-muted);
            padding-top: 12px;
            border-top: 1px solid var(--y3-border);
        }
        .resource-card .card-meta .meta-date {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .resource-card .card-meta .meta-tag {
            background-color: var(--y3-warm-grey);
            padding: 3px 10px;
            border-radius: 14px;
            font-size: 12px;
            font-weight: 500;
            color: var(--y3-text-secondary);
        }
        /* 资源类型入口 */
        .type-entry-card {
            background-color: #FFFEFC;
            border: 1px solid var(--y3-border);
            border-radius: var(--y3-radius-md);
            padding: 24px;
            text-align: left;
            transition: box-shadow 0.3s ease, transform 0.3s ease, border-color 0.3s ease;
            height: 100%;
        }
        .type-entry-card:hover {
            box-shadow: var(--y3-shadow-md);
            transform: translateY(-3px);
            border-color: rgba(198,241,53,0.5);
        }
        .type-entry-card .type-icon {
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background-color: rgba(198,241,53,0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--y3-charcoal);
            font-size: 20px;
            margin-bottom: 14px;
        }
        .type-entry-card h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--y3-text-primary);
            margin-bottom: 8px;
        }
        .type-entry-card p {
            font-size: 14px;
            color: var(--y3-text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }
        /* 数据指标面板 */
        .metric-panel-dark {
            background-color: var(--y3-charcoal);
            border-radius: var(--y3-radius-lg);
            padding: 40px 36px;
            color: var(--y3-text-inverse);
        }
        .metric-panel-dark .metric-item {
            text-align: center;
            padding: 12px 8px;
        }
        .metric-panel-dark .metric-value {
            font-size: 36px;
            font-weight: 800;
            font-family: var(--y3-font-mono);
            color: var(--y3-acid);
            line-height: 1.2;
            letter-spacing: -0.5px;
        }
        .metric-panel-dark .metric-label {
            font-size: 14px;
            color: rgba(255,255,255,0.7);
            margin-top: 8px;
        }
        .metric-panel-dark .metric-divider {
            width: 1px;
            background-color: rgba(255,255,255,0.15);
            align-self: stretch;
        }
        /* 使用场景 */
        .scenario-card {
            background-color: #FFFEFC;
            border: 1px solid var(--y3-border);
            border-radius: var(--y3-radius-md);
            padding: 24px 22px;
            transition: box-shadow 0.3s ease, transform 0.3s ease;
            height: 100%;
        }
        .scenario-card:hover {
            box-shadow: var(--y3-shadow-md);
            transform: translateY(-3px);
        }
        .scenario-card .scenario-badge {
            display: inline-block;
            background-color: rgba(255,107,61,0.1);
            color: var(--y3-orange);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 14px;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }
        .scenario-card h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--y3-text-primary);
            margin-bottom: 8px;
            line-height: 1.5;
        }
        .scenario-card p {
            font-size: 14px;
            color: var(--y3-text-secondary);
            line-height: 1.75;
            margin-bottom: 0;
        }
        /* FAQ */
        .faq-wrapper {
            max-width: 820px;
            margin: 0 auto;
        }
        .accordion-y3 {
            --bs-accordion-bg: #FFFEFC;
            --bs-accordion-border-color: var(--y3-border);
            --bs-accordion-border-radius: var(--y3-radius-md);
            --bs-accordion-inner-border-radius: var(--y3-radius-md);
            --bs-accordion-btn-padding-x: 20px;
            --bs-accordion-btn-padding-y: 18px;
            --bs-accordion-body-padding-x: 20px;
            --bs-accordion-body-padding-y: 16px;
            --bs-accordion-active-bg: rgba(198,241,53,0.08);
            --bs-accordion-active-color: var(--y3-charcoal);
            --bs-accordion-btn-focus-box-shadow: none;
            --bs-accordion-btn-active-icon: none;
        }
        .accordion-y3 .accordion-item {
            margin-bottom: 12px;
            border: 1px solid var(--y3-border);
            border-radius: var(--y3-radius-md) !important;
            overflow: hidden;
        }
        .accordion-y3 .accordion-button {
            font-size: 16px;
            font-weight: 600;
            color: var(--y3-text-primary);
            background-color: #FFFEFC;
        }
        .accordion-y3 .accordion-button:not(.collapsed) {
            background-color: rgba(198,241,53,0.08);
            color: var(--y3-charcoal);
            box-shadow: none;
        }
        .accordion-y3 .accordion-button::after {
            color: var(--y3-text-muted);
            font-size: 14px;
        }
        .accordion-y3 .accordion-body {
            font-size: 15px;
            color: var(--y3-text-secondary);
            line-height: 1.8;
        }
        /* 订阅表单 */
        .subscribe-panel {
            background-color: var(--y3-warm-grey);
            border-radius: var(--y3-radius-lg);
            padding: 44px 36px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
        }
        .subscribe-panel .subscribe-text {
            flex: 1;
            min-width: 260px;
        }
        .subscribe-panel .subscribe-text h2 {
            font-size: 22px;
            font-weight: 800;
            color: var(--y3-text-primary);
            margin-bottom: 8px;
        }
        .subscribe-panel .subscribe-text p {
            font-size: 14px;
            color: var(--y3-text-secondary);
            margin-bottom: 0;
        }
        .subscribe-form {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            align-items: center;
        }
        .subscribe-form input[type="email"] {
            width: 280px;
            max-width: 100%;
            padding: 14px 18px;
            border: 1px solid var(--y3-border);
            border-radius: var(--y3-radius-sm);
            background-color: #FFFFFF;
            font-size: 15px;
            color: var(--y3-text-primary);
            transition: border-color 0.25s ease, box-shadow 0.25s ease;
        }
        .subscribe-form input[type="email"]::placeholder {
            color: var(--y3-text-muted);
        }
        .subscribe-form input[type="email"]:focus {
            outline: none;
            border-color: var(--y3-acid);
            box-shadow: 0 0 0 3px rgba(198,241,53,0.25);
        }
        /* 底部品牌带 */
        .brand-belt {
            background-color: var(--y3-charcoal);
            color: var(--y3-text-inverse);
            padding: 32px 0;
            text-align: center;
        }
        .brand-belt .brand-slogan {
            font-size: 18px;
            font-weight: 700;
            color: var(--y3-text-inverse);
            letter-spacing: 1px;
        }
        .brand-belt .brand-explainer {
            font-size: 14px;
            color: rgba(255,255,255,0.7);
            margin-top: 6px;
        }
        /* 页脚 */
        .site-footer {
            background-color: var(--y3-charcoal);
            color: rgba(255,255,255,0.8);
            padding-top: 48px;
        }
        .site-footer .container {
            padding-bottom: 32px;
        }
        .site-footer .footer-brand {
            font-size: 20px;
            font-weight: 800;
            color: #FFFFFF;
            letter-spacing: 0.5px;
            margin-bottom: 12px;
        }
        .site-footer .footer-desc {
            font-size: 14px;
            color: rgba(255,255,255,0.7);
            line-height: 1.7;
            margin-bottom: 0;
        }
        .site-footer .footer-heading {
            font-size: 14px;
            font-weight: 700;
            color: #FFFFFF;
            letter-spacing: 0.5px;
            margin-bottom: 14px;
            text-transform: uppercase;
        }
        .site-footer .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .site-footer .footer-links li {
            margin-bottom: 8px;
        }
        .site-footer .footer-links a {
            font-size: 14px;
            color: rgba(255,255,255,0.7);
            transition: color 0.25s ease;
        }
        .site-footer .footer-links a:hover {
            color: var(--y3-acid);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.15);
            padding: 16px 0;
            background-color: var(--y3-charcoal);
        }
        .footer-bottom .container {
            display: flex;
            flex-wrap: wrap;
            gap: 12px 20px;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            color: rgba(255,255,255,0.55);
        }
        .footer-bottom a {
            color: rgba(255,255,255,0.55);
            font-size: 12px;
            transition: color 0.25s ease;
        }
        .footer-bottom a:hover {
            color: var(--y3-acid);
        }
        /* 响应式 */
        @media (max-width: 991px) {
            .nav-menu-desktop {
                display: none;
            }
            .navbar-toggler {
                display: block;
            }
            .main-nav {
                height: 68px;
            }
            .category-hero h1 {
                font-size: 28px;
            }
            section {
                padding: var(--y3-section-padding-mobile) 0;
            }
            .metric-panel-dark {
                padding: 32px 20px;
            }
            .metric-panel-dark .metric-value {
                font-size: 28px;
            }
            .subscribe-panel {
                padding: 32px 24px;
                flex-direction: column;
                text-align: center;
            }
            .subscribe-form {
                justify-content: center;
            }
            .subscribe-form input[type="email"] {
                width: 100%;
            }
        }
        @media (max-width: 767px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .category-hero h1 {
                font-size: 24px;
            }
            .category-hero .hero-desc {
                font-size: 15px;
            }
            .hero-stats-row {
                gap: 16px;
            }
            .hero-stat-item .stat-number {
                font-size: 22px;
            }
            .resource-card .card-body {
                padding: 16px 16px 20px;
            }
            .resource-card .card-title {
                font-size: 15px;
            }
            .metric-panel-dark .metric-item {
                padding: 8px 4px;
            }
            .metric-panel-dark .metric-value {
                font-size: 24px;
            }
            .metric-panel-dark .metric-divider {
                display: none;
            }
            .section-header h2 {
                font-size: 22px;
            }
            .subscribe-panel .subscribe-text h2 {
                font-size: 20px;
            }
            .footer-bottom .container {
                flex-direction: column;
                gap: 8px;
                text-align: center;
            }
        }
        @media (max-width: 575px) {
            .category-hero h1 {
                font-size: 21px;
                line-height: 1.5;
            }
            .hero-stats-row {
                flex-direction: column;
                gap: 8px;
            }
            .hero-stat-item {
                flex-direction: row;
                align-items: baseline;
                gap: 8px;
            }
            .top-info-bar .container {
                flex-wrap: wrap;
                gap: 4px;
            }
            .top-info-right .lang-trigger {
                display: none;
            }
        }
        @media (min-width: 992px) {
            .navbar-toggler {
                display: none;
            }
            .mobile-menu-collapse {
                display: none !important;
            }
        }

/* roulang page: category4 */
:root {
      --y3-charcoal: #1C1E21;
      --y3-acid: #C6F135;
      --y3-acid-hover: #B4E02A;
      --y3-orange: #FF6B3D;
      --y3-warm-white: #F7F5F0;
      --y3-warm-grey: #EDEAE3;
      --y3-border: #E0DDD5;
      --y3-text-primary: #1C1E21;
      --y3-text-secondary: #4A4E52;
      --y3-text-muted: #85898E;
      --y3-text-inverse: #FFFFFF;
      --y3-radius-sm: 8px;
      --y3-radius-md: 12px;
      --y3-radius-lg: 16px;
      --y3-shadow-sm: 0 2px 8px rgba(28,30,33,0.06);
      --y3-shadow-md: 0 8px 24px rgba(28,30,33,0.12);
      --y3-shadow-lg: 0 12px 32px rgba(28,30,33,0.16);
      --y3-font-sans: 'Noto Sans SC', 'Source Han Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
      --y3-font-mono: 'SF Mono', 'Fira Code', 'Cascadia Mono', 'Noto Sans SC', monospace;
      --y3-section-padding: 72px;
      --y3-section-padding-mobile: 48px;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--y3-font-sans);
      font-size: 16px;
      line-height: 1.75;
      color: var(--y3-text-primary);
      background-color: var(--y3-warm-white);
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
      overflow-x: hidden;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    a {
      color: var(--y3-text-primary);
      text-decoration: none;
      transition: color 0.25s ease, background-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease, border-color 0.25s ease;
    }

    a:hover {
      color: var(--y3-orange);
    }

    button,
    input,
    textarea,
    select {
      font-family: inherit;
      font-size: inherit;
    }

    button:focus,
    input:focus,
    textarea:focus,
    select:focus,
    a:focus {
      outline: 2px solid var(--y3-acid);
      outline-offset: 2px;
    }

    .container {
      max-width: 1200px;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 顶部信息条 */
    .top-info-bar {
      background-color: var(--y3-charcoal);
      color: #E8E9EB;
      height: 38px;
      display: flex;
      align-items: center;
      font-size: 13px;
    }

    .top-info-bar .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
    }

    .top-info-left {
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }

    .top-info-right {
      display: flex;
      align-items: center;
      gap: 16px;
      white-space: nowrap;
    }

    .top-info-right .top-cta {
      color: var(--y3-acid);
      font-weight: 600;
      font-size: 13px;
      display: inline-flex;
      align-items: center;
      gap: 4px;
      transition: color 0.25s ease;
    }

    .top-info-right .top-cta:hover {
      color: var(--y3-acid-hover);
    }

    .lang-switch {
      color: #E8E9EB;
      display: inline-flex;
      align-items: center;
      gap: 4px;
      cursor: default;
    }

    /* 主导航 */
    .main-nav {
      background-color: #FFFEFC;
      border-bottom: 1px solid var(--y3-border);
      height: 76px;
      display: flex;
      align-items: center;
      position: sticky;
      top: 0;
      z-index: 1040;
      transition: box-shadow 0.3s ease;
    }

    .main-nav .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }

    .brand-logo {
      font-size: 22px;
      font-weight: 800;
      letter-spacing: 0.5px;
      color: var(--y3-charcoal);
      display: inline-flex;
      align-items: center;
      gap: 8px;
      white-space: nowrap;
    }

    .brand-logo .logo-dot {
      display: inline-block;
      width: 10px;
      height: 10px;
      background-color: var(--y3-acid);
      border-radius: 50%;
      margin-right: 2px;
    }

    .brand-logo:hover {
      color: var(--y3-charcoal);
    }

    .nav-menu-desktop {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
      margin: 0;
      padding: 0;
    }

    .nav-menu-desktop li a {
      font-size: 15px;
      font-weight: 500;
      color: var(--y3-text-primary);
      padding: 8px 2px;
      border-bottom: 2px solid transparent;
      white-space: nowrap;
      position: relative;
      transition: color 0.25s ease, border-color 0.25s ease;
    }

    .nav-menu-desktop li a:hover {
      color: var(--y3-charcoal);
      border-bottom-color: var(--y3-acid);
    }

    .nav-menu-desktop li a.active {
      color: var(--y3-charcoal);
      border-bottom-color: var(--y3-acid);
      font-weight: 700;
    }

    .nav-menu-desktop li a.active::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: -2px;
      width: 100%;
      height: 3px;
      background-color: var(--y3-acid);
      border-radius: 0 0 2px 2px;
    }

    .navbar-toggler {
      border: none;
      background: transparent;
      font-size: 24px;
      color: var(--y3-charcoal);
      padding: 4px 8px;
      display: none;
    }

    .navbar-toggler:focus {
      box-shadow: none;
      outline: 2px solid var(--y3-acid);
      outline-offset: 2px;
    }

    /* 移动端菜单 */
    .mobile-menu-collapse {
      background-color: #FFFEFC;
      border-bottom: 1px solid var(--y3-border);
      padding: 16px 0;
      display: none;
    }

    .mobile-menu-collapse.show {
      display: block;
    }

    .mobile-menu-collapse ul {
      list-style: none;
      margin: 0;
      padding: 0;
    }

    .mobile-menu-collapse li a {
      display: block;
      padding: 10px 24px;
      font-size: 16px;
      font-weight: 500;
      color: var(--y3-text-primary);
      border-left: 3px solid transparent;
    }

    .mobile-menu-collapse li a.active {
      color: var(--y3-charcoal);
      border-left-color: var(--y3-acid);
      background-color: rgba(198, 241, 53, 0.08);
      font-weight: 700;
    }

    .mobile-menu-collapse li a:hover {
      background-color: var(--y3-warm-grey);
      color: var(--y3-charcoal);
    }

    /* 分类页 H1 区 */
    .category-hero {
      background-color: #FFFEFC;
      border-bottom: 1px solid var(--y3-border);
      padding-top: 40px;
      padding-bottom: 40px;
    }

    .breadcrumb {
      margin-bottom: 16px;
    }

    .breadcrumb-item a {
      color: var(--y3-text-muted);
    }

    .breadcrumb-item a:hover {
      color: var(--y3-orange);
    }

    .breadcrumb-item.active {
      color: var(--y3-charcoal);
      font-weight: 500;
    }

    .category-hero h1 {
      font-size: 32px;
      font-weight: 800;
      line-height: 1.4;
      margin-bottom: 16px;
      color: var(--y3-charcoal);
    }

    .category-hero .lead {
      font-size: 17px;
      color: var(--y3-text-secondary);
      line-height: 1.8;
      margin-bottom: 0;
    }

    .category-hero-meta {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-top: 20px;
      color: var(--y3-text-muted);
      font-size: 14px;
    }

    .category-hero-meta span {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .category-hero-img {
      border-radius: var(--y3-radius-lg);
      overflow: hidden;
      box-shadow: var(--y3-shadow-md);
      background-color: var(--y3-warm-grey);
    }

    .category-hero-img img {
      width: 100%;
      height: 280px;
      object-fit: cover;
    }

    /* 通用板块 */
    .section {
      padding: var(--y3-section-padding) 0;
    }

    .section-alt {
      background-color: var(--y3-warm-grey);
    }

    .section-heading {
      margin-bottom: 32px;
    }

    .section-heading h2 {
      font-size: 26px;
      font-weight: 800;
      color: var(--y3-charcoal);
      margin-bottom: 12px;
    }

    .section-heading p {
      color: var(--y3-text-secondary);
      font-size: 16px;
      line-height: 1.8;
      margin-bottom: 0;
    }

    /* 卡片列表 */
    .article-card {
      background-color: #FFFEFC;
      border: 1px solid var(--y3-border);
      border-radius: var(--y3-radius-md);
      overflow: hidden;
      height: 100%;
      transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
      box-shadow: var(--y3-shadow-sm);
    }

    .article-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--y3-shadow-md);
      border-color: var(--y3-border);
    }

    .article-card-img {
      width: 100%;
      height: 180px;
      object-fit: cover;
      background-color: var(--y3-warm-grey);
    }

    .article-card-body {
      padding: 20px 20px 22px;
    }

    .article-card-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-bottom: 10px;
    }

    .badge-tag {
      background-color: var(--y3-warm-grey);
      color: var(--y3-text-secondary);
      border-radius: 999px;
      padding: 4px 12px;
      font-size: 12px;
      font-weight: 500;
    }

    .badge-tag.accent {
      background-color: rgba(198, 241, 53, 0.22);
      color: var(--y3-charcoal);
    }

    .article-card h3 {
      font-size: 18px;
      font-weight: 700;
      line-height: 1.5;
      margin-bottom: 10px;
      color: var(--y3-charcoal);
    }

    .article-card p {
      color: var(--y3-text-secondary);
      font-size: 14px;
      line-height: 1.7;
      margin-bottom: 14px;
    }

    .article-card-date {
      font-size: 13px;
      color: var(--y3-text-muted);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .list-more {
      margin-top: 32px;
      text-align: center;
    }

    /* 按钮 */
    .btn {
      border-radius: var(--y3-radius-sm);
      padding: 12px 24px;
      font-weight: 600;
      font-size: 15px;
      transition: all 0.25s ease;
      border: 1.5px solid transparent;
    }

    .btn-acid {
      background-color: var(--y3-acid);
      color: var(--y3-charcoal);
      border-color: var(--y3-acid);
    }

    .btn-acid:hover {
      background-color: var(--y3-acid-hover);
      border-color: var(--y3-acid-hover);
      color: var(--y3-charcoal);
      box-shadow: var(--y3-shadow-md);
      transform: translateY(-2px);
    }

    .btn-outline-dark {
      background-color: transparent;
      color: var(--y3-charcoal);
      border-color: var(--y3-charcoal);
    }

    .btn-outline-dark:hover {
      background-color: var(--y3-charcoal);
      color: var(--y3-text-inverse);
      border-color: var(--y3-charcoal);
    }

    .btn-light {
      background-color: #FFFFFF;
      color: var(--y3-charcoal);
      border-color: #FFFFFF;
    }

    .btn-light:hover {
      background-color: var(--y3-acid);
      border-color: var(--y3-acid);
      color: var(--y3-charcoal);
    }

    .btn-lg {
      padding: 14px 28px;
      font-size: 16px;
    }

    /* 数据面板 */
    .data-panel {
      background-color: var(--y3-charcoal);
      border-radius: var(--y3-radius-lg);
      padding: 36px 32px;
      color: var(--y3-text-inverse);
    }

    .data-item {
      text-align: center;
      padding: 12px 0;
    }

    .data-item .number {
      font-family: var(--y3-font-mono);
      font-size: 36px;
      font-weight: 800;
      color: var(--y3-acid);
      line-height: 1.2;
    }

    .data-item .unit {
      font-size: 16px;
      color: var(--y3-acid);
      margin-left: 2px;
    }

    .data-item .label {
      color: #C9CDD1;
      font-size: 14px;
      margin-top: 8px;
    }

    /* 流程时间线 */
    .process-timeline {
      position: relative;
      padding-left: 28px;
    }

    .process-timeline::before {
      content: '';
      position: absolute;
      left: 8px;
      top: 8px;
      bottom: 8px;
      width: 2px;
      background-color: var(--y3-border);
    }

    .process-step {
      position: relative;
      padding-bottom: 28px;
    }

    .process-step:last-child {
      padding-bottom: 0;
    }

    .process-step .step-dot {
      position: absolute;
      left: -25px;
      top: 6px;
      width: 14px;
      height: 14px;
      border-radius: 50%;
      background-color: var(--y3-acid);
      border: 3px solid #FFFEFC;
      box-shadow: 0 0 0 1px var(--y3-border);
    }

    .process-step h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--y3-charcoal);
      margin-bottom: 6px;
    }

    .process-step p {
      color: var(--y3-text-secondary);
      font-size: 15px;
      line-height: 1.8;
      margin-bottom: 0;
    }

    /* 行业优势横向 */
    .industry-row {
      background-color: #FFFEFC;
      border: 1px solid var(--y3-border);
      border-radius: var(--y3-radius-md);
      padding: 24px;
      margin-bottom: 20px;
      transition: box-shadow 0.25s ease, transform 0.25s ease;
    }

    .industry-row:last-child {
      margin-bottom: 0;
    }

    .industry-row:hover {
      box-shadow: var(--y3-shadow-md);
      transform: translateY(-2px);
    }

    .industry-row .icon-box {
      width: 44px;
      height: 44px;
      border-radius: var(--y3-radius-sm);
      background-color: rgba(198, 241, 53, 0.18);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--y3-charcoal);
      font-size: 20px;
    }

    .industry-row h3 {
      font-size: 19px;
      font-weight: 700;
      color: var(--y3-charcoal);
      margin-bottom: 8px;
    }

    .industry-row p {
      color: var(--y3-text-secondary);
      font-size: 15px;
      line-height: 1.8;
      margin-bottom: 0;
    }

    .industry-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 12px;
    }

    /* 证言 */
    .testimonial-card {
      background-color: #FFFEFC;
      border: 1px solid var(--y3-border);
      border-radius: var(--y3-radius-md);
      padding: 24px;
      height: 100%;
      box-shadow: var(--y3-shadow-sm);
    }

    .testimonial-quote {
      color: var(--y3-text-secondary);
      font-size: 15px;
      line-height: 1.8;
      margin-bottom: 16px;
      position: relative;
      padding-left: 20px;
    }

    .testimonial-quote::before {
      content: '“';
      position: absolute;
      left: 0;
      top: -6px;
      font-size: 32px;
      color: var(--y3-acid);
      font-weight: 700;
    }

    .testimonial-author {
      color: var(--y3-charcoal);
      font-weight: 600;
      font-size: 14px;
    }

    .testimonial-role {
      color: var(--y3-text-muted);
      font-size: 13px;
      display: block;
      margin-top: 2px;
    }

    /* FAQ */
    .accordion-item {
      background-color: #FFFEFC;
      border: 1px solid var(--y3-border);
      border-radius: var(--y3-radius-sm) !important;
      margin-bottom: 12px;
      overflow: hidden;
    }

    .accordion-button {
      background-color: #FFFEFC;
      color: var(--y3-charcoal);
      font-weight: 600;
      font-size: 16px;
      padding: 18px 20px;
      box-shadow: none;
      border: none;
    }

    .accordion-button:not(.collapsed) {
      background-color: rgba(198, 241, 53, 0.12);
      color: var(--y3-charcoal);
      box-shadow: none;
    }

    .accordion-button:focus {
      box-shadow: none;
      outline: 2px solid var(--y3-acid);
      outline-offset: -2px;
    }

    .accordion-button::after {
      filter: grayscale(1) brightness(0.4);
    }

    .accordion-body {
      color: var(--y3-text-secondary);
      font-size: 15px;
      line-height: 1.8;
      padding: 0 20px 20px;
    }

    /* CTA */
    .cta-section {
      background-color: var(--y3-charcoal);
      color: var(--y3-text-inverse);
      padding: 64px 0;
      text-align: center;
    }

    .cta-section h2 {
      font-size: 28px;
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 16px;
    }

    .cta-section p {
      color: #C9CDD1;
      font-size: 17px;
      line-height: 1.8;
      margin-bottom: 32px;
      max-width: 640px;
      margin-left: auto;
      margin-right: auto;
    }

    .cta-actions {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 16px;
    }

    /* 页脚 */
    .site-footer {
      background-color: #FFFEFC;
      border-top: 1px solid var(--y3-border);
      padding-top: 48px;
      padding-bottom: 0;
    }

    .footer-brand {
      font-size: 20px;
      font-weight: 800;
      color: var(--y3-charcoal);
      margin-bottom: 12px;
    }

    .footer-desc {
      color: var(--y3-text-secondary);
      font-size: 14px;
      line-height: 1.8;
    }

    .footer-heading {
      font-size: 15px;
      font-weight: 700;
      color: var(--y3-charcoal);
      margin-bottom: 14px;
    }

    .footer-links {
      list-style: none;
      margin: 0;
      padding: 0;
    }

    .footer-links li {
      margin-bottom: 8px;
    }

    .footer-links a {
      color: var(--y3-text-secondary);
      font-size: 14px;
    }

    .footer-links a:hover {
      color: var(--y3-orange);
    }

    .footer-bottom {
      background-color: var(--y3-warm-grey);
      padding: 16px 0;
      margin-top: 32px;
      font-size: 13px;
      color: var(--y3-text-muted);
    }

    .footer-bottom .container {
      display: flex;
      flex-wrap: wrap;
      gap: 12px 20px;
      justify-content: center;
      text-align: center;
    }

    .footer-bottom a {
      color: var(--y3-text-muted);
    }

    .footer-bottom a:hover {
      color: var(--y3-orange);
    }

    /* 响应式 */
    @media (max-width: 1199px) {
      .nav-menu-desktop {
        gap: 18px;
      }
    }

    @media (max-width: 991px) {
      .nav-menu-desktop {
        display: none;
      }

      .navbar-toggler {
        display: inline-block;
      }

      .main-nav {
        height: 68px;
      }

      .category-hero {
        padding-top: 32px;
        padding-bottom: 32px;
      }

      .category-hero-img img {
        height: 220px;
      }
    }

    @media (max-width: 767px) {
      :root {
        --y3-section-padding: var(--y3-section-padding-mobile);
      }

      .top-info-bar {
        height: auto;
        min-height: 36px;
        padding: 6px 0;
      }

      .top-info-bar .container {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
      }

      .top-info-right {
        gap: 12px;
      }

      .category-hero h1 {
        font-size: 26px;
      }

      .category-hero .lead {
        font-size: 15px;
      }

      .section-heading h2 {
        font-size: 22px;
      }

      .data-item .number {
        font-size: 28px;
      }

      .cta-section h2 {
        font-size: 24px;
      }

      .footer-bottom .container {
        flex-direction: column;
        align-items: center;
        gap: 8px;
      }
    }

    @media (max-width: 575px) {
      .container {
        padding-left: 16px;
        padding-right: 16px;
      }

      .brand-logo {
        font-size: 19px;
      }

      .category-hero {
        padding-top: 28px;
        padding-bottom: 28px;
      }

      .category-hero-img img {
        height: 180px;
      }

      .article-card-img {
        height: 160px;
      }

      .btn {
        padding: 10px 20px;
        font-size: 14px;
      }

      .data-panel {
        padding: 28px 20px;
      }
    }

/* roulang page: category6 */
:root {
            --y3-charcoal: #1C1E21;
            --y3-acid: #C6F135;
            --y3-acid-hover: #B4E02A;
            --y3-orange: #FF6B3D;
            --y3-warm-white: #F7F5F0;
            --y3-warm-grey: #EDEAE3;
            --y3-border: #E0DDD5;
            --y3-text-primary: #1C1E21;
            --y3-text-secondary: #4A4E52;
            --y3-text-muted: #85898E;
            --y3-text-inverse: #FFFFFF;
            --y3-radius-sm: 8px;
            --y3-radius-md: 12px;
            --y3-radius-lg: 16px;
            --y3-shadow-sm: 0 2px 8px rgba(28,30,33,0.06);
            --y3-shadow-md: 0 8px 24px rgba(28,30,33,0.12);
            --y3-shadow-lg: 0 12px 32px rgba(28,30,33,0.16);
            --y3-font-sans: 'Noto Sans SC', 'Source Han Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
            --y3-font-mono: 'SF Mono', 'Fira Code', 'Cascadia Mono', 'Noto Sans SC', monospace;
            --y3-section-padding: 72px;
            --y3-section-padding-mobile: 48px;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--y3-font-sans);
            font-size: 16px;
            line-height: 1.75;
            color: var(--y3-text-primary);
            background-color: var(--y3-warm-white);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--y3-text-primary);
            text-decoration: none;
            transition: color 0.25s ease, background-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease, border-color 0.25s ease;
        }
        a:hover {
            color: var(--y3-orange);
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
        }
        button:focus,
        input:focus,
        textarea:focus,
        select:focus,
        a:focus {
            outline: 2px solid var(--y3-acid);
            outline-offset: 2px;
        }
        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }
        /* 顶部信息条 */
        .top-info-bar {
            background-color: var(--y3-charcoal);
            color: #E9E9E4;
            min-height: 38px;
            font-size: 13px;
            display: flex;
            align-items: center;
            padding: 6px 0;
        }
        .top-info-bar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .top-info-left {
            font-size: 13px;
            color: #C9C9C4;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .top-info-right {
            display: flex;
            align-items: center;
            gap: 16px;
            white-space: nowrap;
        }
        .top-info-right .top-cta {
            color: var(--y3-acid);
            font-weight: 600;
            font-size: 13px;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: color 0.25s ease;
        }
        .top-info-right .top-cta:hover {
            color: var(--y3-acid-hover);
        }
        .lang-switch {
            color: #C9C9C4;
            font-size: 13px;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .lang-switch i {
            font-size: 12px;
        }
        /* 主导航 */
        .main-nav {
            background-color: #FFFEFC;
            border-bottom: 1px solid var(--y3-border);
            height: 76px;
            display: flex;
            align-items: center;
            position: sticky;
            top: 0;
            z-index: 1040;
            transition: box-shadow 0.3s ease;
        }
        .main-nav .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }
        .brand-logo {
            font-size: 22px;
            font-weight: 800;
            letter-spacing: 0.5px;
            color: var(--y3-charcoal);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }
        .brand-logo .logo-dot {
            display: inline-block;
            width: 10px;
            height: 10px;
            background-color: var(--y3-acid);
            border-radius: 50%;
            margin-right: 2px;
        }
        .brand-logo:hover {
            color: var(--y3-charcoal);
        }
        .nav-menu-desktop {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-menu-desktop li a {
            font-size: 15px;
            font-weight: 500;
            color: var(--y3-text-primary);
            padding: 8px 2px;
            border-bottom: 2px solid transparent;
            white-space: nowrap;
            position: relative;
            transition: color 0.25s ease, border-color 0.25s ease;
        }
        .nav-menu-desktop li a:hover {
            color: var(--y3-charcoal);
            border-bottom-color: var(--y3-acid);
        }
        .nav-menu-desktop li a.active {
            color: var(--y3-charcoal);
            border-bottom-color: var(--y3-acid);
            font-weight: 700;
        }
        .nav-menu-desktop li a.active::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 100%;
            height: 3px;
            background-color: var(--y3-acid);
            border-radius: 0 0 2px 2px;
        }
        .navbar-toggler {
            border: none;
            background: transparent;
            font-size: 24px;
            color: var(--y3-charcoal);
            padding: 4px 8px;
        }
        .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid var(--y3-acid);
            outline-offset: 2px;
        }
        .mobile-menu-collapse {
            background-color: #FFFEFC;
            border-bottom: 1px solid var(--y3-border);
            padding: 16px 0;
            display: none;
        }
        .mobile-menu-collapse.show {
            display: block;
        }
        .mobile-menu-collapse ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .mobile-menu-collapse ul li {
            padding: 8px 0;
        }
        .mobile-menu-collapse ul li a {
            font-size: 16px;
            font-weight: 500;
            color: var(--y3-text-primary);
            display: block;
            padding: 4px 0;
        }
        .mobile-menu-collapse ul li a.active {
            color: var(--y3-charcoal);
            font-weight: 700;
            border-left: 3px solid var(--y3-acid);
            padding-left: 12px;
        }
        /* 面包屑 */
        .breadcrumb-y3 {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 14px;
            color: var(--y3-text-muted);
            padding: 16px 0;
            margin: 0;
            list-style: none;
        }
        .breadcrumb-y3 li {
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .breadcrumb-y3 li:not(:last-child)::after {
            content: '/';
            color: #B8B8B2;
            margin-left: 4px;
        }
        .breadcrumb-y3 a {
            color: var(--y3-text-secondary);
        }
        .breadcrumb-y3 a:hover {
            color: var(--y3-orange);
        }
        .breadcrumb-y3 .current {
            color: var(--y3-text-primary);
            font-weight: 600;
        }
        /* 分类H1区 */
        .page-hero-cat {
            padding: 40px 0 32px;
            background-color: var(--y3-warm-white);
            border-bottom: 1px solid var(--y3-border);
        }
        .page-hero-cat h1 {
            font-size: 34px;
            font-weight: 800;
            line-height: 1.4;
            margin-bottom: 16px;
            color: var(--y3-charcoal);
        }
        .page-hero-cat .cat-desc {
            font-size: 17px;
            color: var(--y3-text-secondary);
            max-width: 780px;
            line-height: 1.8;
            margin-bottom: 8px;
        }
        .cat-meta-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 12px;
        }
        .cat-meta-tags .tag-chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background-color: var(--y3-warm-grey);
            border-radius: 20px;
            padding: 4px 14px;
            font-size: 13px;
            color: var(--y3-text-secondary);
            border: 1px solid var(--y3-border);
        }
        .cat-meta-tags .tag-chip i {
            font-size: 11px;
            color: var(--y3-orange);
        }
        /* 板块通用 */
        .section-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background-color: rgba(198, 241, 53, 0.15);
            color: #2C3E0B;
            border-radius: 20px;
            padding: 4px 14px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 14px;
            border: 1px solid rgba(198, 241, 53, 0.4);
        }
        .section-title {
            font-size: 26px;
            font-weight: 800;
            color: var(--y3-charcoal);
            margin-bottom: 12px;
            line-height: 1.45;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--y3-text-secondary);
            max-width: 720px;
            line-height: 1.8;
            margin-bottom: 28px;
        }
        .section-y3 {
            padding: var(--y3-section-padding) 0;
        }
        .section-y3-alt {
            background-color: var(--y3-warm-grey);
            padding: var(--y3-section-padding) 0;
            border-top: 1px solid var(--y3-border);
            border-bottom: 1px solid var(--y3-border);
        }
        .section-y3-dark {
            background-color: var(--y3-charcoal);
            color: var(--y3-text-inverse);
            padding: var(--y3-section-padding) 0;
        }
        .section-y3-dark .section-title {
            color: var(--y3-text-inverse);
        }
        .section-y3-dark .section-subtitle {
            color: rgba(255,255,255,0.72);
        }
        /* 按钮 */
        .btn-y3-primary {
            background-color: var(--y3-acid);
            color: var(--y3-charcoal);
            border: none;
            border-radius: var(--y3-radius-sm);
            padding: 14px 28px;
            font-weight: 600;
            font-size: 15px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: background-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
            box-shadow: 0 2px 6px rgba(198, 241, 53, 0.3);
        }
        .btn-y3-primary:hover {
            background-color: var(--y3-acid-hover);
            color: var(--y3-charcoal);
            box-shadow: 0 6px 16px rgba(198, 241, 53, 0.45);
            transform: translateY(-1px);
        }
        .btn-y3-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 6px rgba(198, 241, 53, 0.3);
        }
        .btn-y3-outline {
            background-color: transparent;
            color: var(--y3-charcoal);
            border: 1.5px solid var(--y3-charcoal);
            border-radius: var(--y3-radius-sm);
            padding: 13px 27px;
            font-weight: 600;
            font-size: 15px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease;
        }
        .btn-y3-outline:hover {
            background-color: var(--y3-charcoal);
            color: #FFFFFF;
            border-color: var(--y3-charcoal);
        }
        .btn-y3-light {
            background-color: #FFFFFF;
            color: var(--y3-charcoal);
            border: none;
            border-radius: var(--y3-radius-sm);
            padding: 14px 28px;
            font-weight: 600;
            font-size: 15px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: background-color 0.25s ease, color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
        }
        .btn-y3-light:hover {
            background-color: var(--y3-acid);
            color: var(--y3-charcoal);
            box-shadow: 0 6px 16px rgba(255,255,255,0.2);
            transform: translateY(-1px);
        }
        /* 更新卡片列表 */
        .update-card-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .update-card {
            background: #FFFEFC;
            border: 1px solid var(--y3-border);
            border-radius: var(--y3-radius-md);
            overflow: hidden;
            box-shadow: var(--y3-shadow-sm);
            transition: box-shadow 0.3s ease, transform 0.3s ease;
            display: flex;
            flex-direction: column;
        }
        .update-card:hover {
            box-shadow: var(--y3-shadow-md);
            transform: translateY(-3px);
        }
        .update-card .card-img-wrap {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background-color: var(--y3-warm-grey);
        }
        .update-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .update-card:hover .card-img-wrap img {
            transform: scale(1.04);
        }
        .update-card .card-badge-version {
            position: absolute;
            top: 12px;
            left: 12px;
            background-color: var(--y3-charcoal);
            color: #FFFFFF;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 20px;
            letter-spacing: 0.5px;
        }
        .update-card .card-body-update {
            padding: 22px 24px 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .update-card .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--y3-text-muted);
            margin-bottom: 10px;
            flex-wrap: wrap;
        }
        .update-card .card-meta .date-tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            color: var(--y3-text-muted);
        }
        .update-card .card-meta .label-tag {
            background-color: rgba(255, 107, 61, 0.1);
            color: #B8461E;
            font-size: 12px;
            font-weight: 600;
            padding: 2px 10px;
            border-radius: 12px;
            border: 1px solid rgba(255, 107, 61, 0.25);
        }
        .update-card .card-title-update {
            font-size: 18px;
            font-weight: 700;
            color: var(--y3-charcoal);
            margin-bottom: 10px;
            line-height: 1.5;
            transition: color 0.25s ease;
        }
        .update-card:hover .card-title-update {
            color: var(--y3-orange);
        }
        .update-card .card-excerpt {
            font-size: 14px;
            color: var(--y3-text-secondary);
            line-height: 1.7;
            flex: 1;
        }
        .update-card .card-link-more {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--y3-charcoal);
            margin-top: 14px;
            transition: color 0.25s ease, gap 0.25s ease;
        }
        .update-card .card-link-more:hover {
            color: var(--y3-orange);
            gap: 10px;
        }
        /* 时间线 */
        .timeline-y3 {
            position: relative;
            padding-left: 28px;
        }
        .timeline-y3::before {
            content: '';
            position: absolute;
            left: 8px;
            top: 4px;
            bottom: 4px;
            width: 2px;
            background-color: var(--y3-border);
        }
        .timeline-item {
            position: relative;
            padding-bottom: 28px;
        }
        .timeline-item:last-child {
            padding-bottom: 0;
        }
        .timeline-item .timeline-dot {
            position: absolute;
            left: -28px;
            top: 6px;
            width: 18px;
            height: 18px;
            background-color: var(--y3-acid);
            border-radius: 50%;
            border: 3px solid var(--y3-charcoal);
            box-shadow: 0 0 0 3px rgba(198, 241, 53, 0.3);
        }
        .timeline-item .timeline-version {
            font-size: 14px;
            font-weight: 700;
            color: var(--y3-charcoal);
            margin-bottom: 4px;
            font-family: var(--y3-font-mono);
        }
        .timeline-item .timeline-date {
            font-size: 13px;
            color: var(--y3-text-muted);
            margin-bottom: 6px;
        }
        .timeline-item .timeline-desc {
            font-size: 15px;
            color: var(--y3-text-secondary);
            line-height: 1.7;
        }
        /* 数据统计 */
        .stats-row-updates {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .stat-item-update {
            background: rgba(255,255,255,0.06);
            border: 1px solid rgba(255,255,255,0.1);
            border-radius: var(--y3-radius-md);
            padding: 24px 20px;
            text-align: center;
        }
        .stat-item-update .stat-number {
            font-size: 32px;
            font-weight: 800;
            color: var(--y3-acid);
            font-family: var(--y3-font-mono);
            line-height: 1.2;
            margin-bottom: 8px;
        }
        .stat-item-update .stat-label {
            font-size: 14px;
            color: rgba(255,255,255,0.72);
        }
        /* 特色更新展示 */
        .feature-update-panel {
            background-color: #FFFEFC;
            border: 1px solid var(--y3-border);
            border-radius: var(--y3-radius-lg);
            overflow: hidden;
            box-shadow: var(--y3-shadow-sm);
            display: flex;
            flex-wrap: wrap;
        }
        .feature-update-panel .feature-img {
            flex: 1 1 40%;
            min-height: 280px;
            background-color: var(--y3-warm-grey);
        }
        .feature-update-panel .feature-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .feature-update-panel .feature-content {
            flex: 1 1 60%;
            padding: 32px 36px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .feature-update-panel .feature-version-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background-color: rgba(198, 241, 53, 0.18);
            color: #2C3E0B;
            border-radius: 20px;
            padding: 4px 14px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 14px;
            align-self: flex-start;
            border: 1px solid rgba(198, 241, 53, 0.4);
        }
        .feature-update-panel h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--y3-charcoal);
            margin-bottom: 12px;
            line-height: 1.45;
        }
        .feature-update-panel p {
            font-size: 15px;
            color: var(--y3-text-secondary);
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .feature-update-panel .feature-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .feature-update-panel .feature-list li {
            font-size: 14px;
            color: var(--y3-text-secondary);
            padding: 6px 0;
            display: flex;
            align-items: flex-start;
            gap: 10px;
        }
        .feature-update-panel .feature-list li i {
            color: var(--y3-acid-hover);
            font-size: 14px;
            margin-top: 4px;
        }
        /* FAQ */
        .accordion-y3 .accordion-item {
            background-color: #FFFEFC;
            border: 1px solid var(--y3-border);
            border-radius: var(--y3-radius-sm) !important;
            margin-bottom: 12px;
            overflow: hidden;
        }
        .accordion-y3 .accordion-button {
            font-size: 16px;
            font-weight: 600;
            color: var(--y3-charcoal);
            background-color: #FFFEFC;
            padding: 18px 22px;
            box-shadow: none;
        }
        .accordion-y3 .accordion-button:not(.collapsed) {
            background-color: rgba(198, 241, 53, 0.1);
            color: var(--y3-charcoal);
            box-shadow: none;
        }
        .accordion-y3 .accordion-button:focus {
            box-shadow: none;
            outline: 2px solid var(--y3-acid);
            outline-offset: -2px;
        }
        .accordion-y3 .accordion-button::after {
            filter: none;
        }
        .accordion-y3 .accordion-body {
            font-size: 15px;
            color: var(--y3-text-secondary);
            line-height: 1.8;
            padding: 16px 22px 22px;
        }
        /* 表单 */
        .subscribe-form-y3 {
            display: flex;
            gap: 12px;
            max-width: 520px;
            flex-wrap: wrap;
        }
        .subscribe-form-y3 .form-input {
            flex: 1;
            min-width: 200px;
            padding: 14px 18px;
            border: 1px solid var(--y3-border);
            border-radius: var(--y3-radius-sm);
            background-color: #FFFEFC;
            font-size: 15px;
            transition: border-color 0.25s ease, box-shadow 0.25s ease;
        }
        .subscribe-form-y3 .form-input:focus {
            outline: none;
            border-color: var(--y3-acid);
            box-shadow: 0 0 0 3px rgba(198, 241, 53, 0.15);
        }
        /* 底部品牌带 */
        .bottom-brand-strip {
            background-color: var(--y3-charcoal);
            color: var(--y3-text-inverse);
            padding: 40px 0;
            text-align: center;
            border-top: 1px solid rgba(255,255,255,0.08);
        }
        .bottom-brand-strip .slogan {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .bottom-brand-strip .abbr-explain {
            font-size: 14px;
            color: rgba(255,255,255,0.6);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.7;
        }
        /* 页脚 */
        .site-footer {
            background-color: #151719;
            color: rgba(255,255,255,0.72);
            padding-top: 56px;
            border-top: 1px solid rgba(255,255,255,0.08);
        }
        .site-footer .footer-brand {
            font-size: 20px;
            font-weight: 800;
            color: #FFFFFF;
            margin-bottom: 14px;
        }
        .site-footer .footer-desc {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255,255,255,0.6);
            max-width: 300px;
        }
        .site-footer .footer-heading {
            font-size: 14px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }
        .site-footer .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .site-footer .footer-links li {
            margin-bottom: 8px;
        }
        .site-footer .footer-links a {
            font-size: 14px;
            color: rgba(255,255,255,0.6);
            transition: color 0.25s ease;
        }
        .site-footer .footer-links a:hover {
            color: var(--y3-acid);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding: 18px 0;
            margin-top: 40px;
            font-size: 13px;
            color: rgba(255,255,255,0.45);
        }
        .footer-bottom .container {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom a {
            color: rgba(255,255,255,0.45);
        }
        .footer-bottom a:hover {
            color: var(--y3-acid);
        }
        /* 响应式 */
        @media (max-width: 1199px) {
            .stats-row-updates {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 991px) {
            .update-card-grid {
                grid-template-columns: 1fr;
            }
            .feature-update-panel .feature-img {
                flex: 1 1 100%;
                min-height: 220px;
            }
            .feature-update-panel .feature-content {
                flex: 1 1 100%;
                padding: 24px 28px;
            }
            .page-hero-cat h1 {
                font-size: 28px;
            }
            .section-title {
                font-size: 22px;
            }
        }
        @media (max-width: 767px) {
            :root {
                --y3-section-padding: 48px;
            }
            .nav-menu-desktop {
                display: none !important;
            }
            .navbar-toggler {
                display: block !important;
            }
            .top-info-bar {
                padding: 4px 0;
            }
            .top-info-left {
                font-size: 12px;
            }
            .page-hero-cat {
                padding: 28px 0 24px;
            }
            .page-hero-cat h1 {
                font-size: 24px;
            }
            .section-title {
                font-size: 20px;
            }
            .section-subtitle {
                font-size: 15px;
            }
            .update-card .card-body-update {
                padding: 18px 18px 20px;
            }
            .stats-row-updates {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .stat-item-update .stat-number {
                font-size: 26px;
            }
            .timeline-y3 {
                padding-left: 22px;
            }
            .timeline-item .timeline-dot {
                left: -22px;
                width: 14px;
                height: 14px;
                border-width: 2px;
            }
        }
        @media (max-width: 575px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .brand-logo {
                font-size: 18px;
            }
            .page-hero-cat h1 {
                font-size: 22px;
                line-height: 1.5;
            }
            .update-card-grid {
                gap: 16px;
            }
            .subscribe-form-y3 {
                flex-direction: column;
            }
            .subscribe-form-y3 .form-input {
                min-width: 100%;
            }
            .stats-row-updates {
                grid-template-columns: 1fr;
            }
            .footer-bottom .container {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }
        }
        @media (min-width: 768px) {
            .navbar-toggler {
                display: none;
            }
        }

/* roulang page: category5 */
:root {
            --y3-charcoal: #1C1E21;
            --y3-acid: #C6F135;
            --y3-acid-hover: #B4E02A;
            --y3-orange: #FF6B3D;
            --y3-warm-white: #F7F5F0;
            --y3-warm-grey: #EDEAE3;
            --y3-border: #E0DDD5;
            --y3-text-primary: #1C1E21;
            --y3-text-secondary: #4A4E52;
            --y3-text-muted: #85898E;
            --y3-text-inverse: #FFFFFF;
            --y3-radius-sm: 8px;
            --y3-radius-md: 12px;
            --y3-radius-lg: 16px;
            --y3-shadow-sm: 0 2px 8px rgba(28,30,33,0.06);
            --y3-shadow-md: 0 8px 24px rgba(28,30,33,0.12);
            --y3-shadow-lg: 0 12px 32px rgba(28,30,33,0.16);
            --y3-font-sans: 'Noto Sans SC', 'Source Han Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
            --y3-font-mono: 'SF Mono', 'Fira Code', 'Cascadia Mono', 'Noto Sans SC', monospace;
            --y3-section-padding: 72px;
            --y3-section-padding-mobile: 48px;
        }
        html {
            scroll-behavior: smooth;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        body {
            font-family: var(--y3-font-sans);
            font-size: 16px;
            line-height: 1.75;
            color: var(--y3-text-primary);
            background-color: var(--y3-warm-white);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
            margin: 0;
            padding: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--y3-text-primary);
            text-decoration: none;
            transition: color 0.25s ease, background-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease, border-color 0.25s ease;
        }
        a:hover {
            color: var(--y3-orange);
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
        }
        button:focus,
        input:focus,
        textarea:focus,
        select:focus,
        a:focus {
            outline: 2px solid var(--y3-acid);
            outline-offset: 2px;
        }
        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }
        /* 顶部信息条 */
        .top-info-bar {
            background-color: var(--y3-charcoal);
            color: rgba(255,255,255,0.85);
            font-size: 13px;
            height: 38px;
            display: flex;
            align-items: center;
            position: relative;
            z-index: 1045;
        }
        .top-info-bar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            width: 100%;
        }
        .top-info-left {
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .top-info-left .info-dot {
            display: inline-block;
            width: 6px;
            height: 6px;
            background-color: var(--y3-acid);
            border-radius: 50%;
            flex-shrink: 0;
        }
        .top-info-right {
            display: flex;
            align-items: center;
            gap: 20px;
            white-space: nowrap;
        }
        .top-info-right .top-cta {
            color: var(--y3-acid);
            font-weight: 600;
            font-size: 13px;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: color 0.25s ease;
        }
        .top-info-right .top-cta:hover {
            color: var(--y3-acid-hover);
        }
        .top-info-right .region-switch {
            color: rgba(255,255,255,0.7);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            cursor: default;
        }
        .top-info-right .region-switch i {
            font-size: 11px;
            color: var(--y3-acid);
        }
        /* 主导航 */
        .main-nav {
            background-color: #FFFEFC;
            border-bottom: 1px solid var(--y3-border);
            height: 76px;
            display: flex;
            align-items: center;
            position: sticky;
            top: 0;
            z-index: 1040;
            transition: box-shadow 0.3s ease;
        }
        .main-nav .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            width: 100%;
        }
        .brand-logo {
            font-size: 22px;
            font-weight: 800;
            letter-spacing: 0.5px;
            color: var(--y3-charcoal);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .brand-logo .logo-dot {
            display: inline-block;
            width: 10px;
            height: 10px;
            background-color: var(--y3-acid);
            border-radius: 50%;
            margin-right: 2px;
            flex-shrink: 0;
        }
        .brand-logo:hover {
            color: var(--y3-charcoal);
        }
        .nav-menu-desktop {
            display: flex;
            align-items: center;
            gap: 24px;
            list-style: none;
            margin: 0;
            padding: 0;
            flex-wrap: nowrap;
            overflow-x: auto;
        }
        .nav-menu-desktop li {
            flex-shrink: 0;
        }
        .nav-menu-desktop li a {
            font-size: 15px;
            font-weight: 500;
            color: var(--y3-text-primary);
            padding: 8px 2px;
            border-bottom: 2px solid transparent;
            white-space: nowrap;
            position: relative;
            transition: color 0.25s ease, border-color 0.25s ease;
            display: inline-block;
        }
        .nav-menu-desktop li a:hover {
            color: var(--y3-charcoal);
            border-bottom-color: var(--y3-acid);
        }
        .nav-menu-desktop li a.active {
            color: var(--y3-charcoal);
            border-bottom-color: var(--y3-acid);
            font-weight: 700;
        }
        .nav-menu-desktop li a.active::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 100%;
            height: 3px;
            background-color: var(--y3-acid);
            border-radius: 0 0 2px 2px;
        }
        .navbar-toggler {
            border: none;
            background: transparent;
            font-size: 24px;
            color: var(--y3-charcoal);
            padding: 4px 8px;
            display: none;
            cursor: pointer;
        }
        .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid var(--y3-acid);
            outline-offset: 2px;
        }
        /* 移动端菜单 */
        .mobile-menu-collapse {
            background-color: #FFFEFC;
            border-bottom: 1px solid var(--y3-border);
            padding: 16px 0;
            display: none;
            position: fixed;
            top: 76px;
            left: 0;
            right: 0;
            z-index: 1035;
            box-shadow: var(--y3-shadow-md);
        }
        .mobile-menu-collapse.show {
            display: block;
        }
        .mobile-menu-collapse ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .mobile-menu-collapse ul li {
            margin: 0;
        }
        .mobile-menu-collapse ul li a {
            display: block;
            padding: 12px 24px;
            font-size: 16px;
            font-weight: 500;
            color: var(--y3-text-primary);
            border-left: 3px solid transparent;
            transition: all 0.25s ease;
        }
        .mobile-menu-collapse ul li a:hover {
            background-color: var(--y3-warm-grey);
            border-left-color: var(--y3-acid);
            color: var(--y3-charcoal);
        }
        .mobile-menu-collapse ul li a.active {
            background-color: var(--y3-warm-grey);
            border-left-color: var(--y3-acid);
            font-weight: 700;
            color: var(--y3-charcoal);
        }
        /* 板块通用 */
        .section-block {
            padding: var(--y3-section-padding) 0;
        }
        .section-block-sm {
            padding: 40px 0;
        }
        .section-block-lg {
            padding: 80px 0;
        }
        .section-heading {
            margin-bottom: 32px;
        }
        .section-heading h2 {
            font-size: 28px;
            font-weight: 800;
            color: var(--y3-text-primary);
            margin: 0 0 8px 0;
            line-height: 1.45;
            letter-spacing: 0.5px;
        }
        .section-heading .section-subtitle {
            font-size: 16px;
            color: var(--y3-text-secondary);
            margin: 0;
            line-height: 1.7;
            max-width: 720px;
        }
        /* 卡片基础 */
        .y3-card {
            background-color: #FFFFFF;
            border: 1px solid var(--y3-border);
            border-radius: var(--y3-radius-md);
            box-shadow: var(--y3-shadow-sm);
            overflow: hidden;
            transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
            height: 100%;
        }
        .y3-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--y3-shadow-md);
            border-color: #D5D0C6;
        }
        .y3-card .card-img-wrap {
            width: 100%;
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background-color: var(--y3-warm-grey);
            position: relative;
        }
        .y3-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
            transition: transform 0.4s ease;
        }
        .y3-card:hover .card-img-wrap img {
            transform: scale(1.03);
        }
        .y3-card .card-body {
            padding: 24px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            flex: 1;
        }
        .y3-card .card-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--y3-text-primary);
            margin: 0;
            line-height: 1.5;
        }
        .y3-card .card-title a {
            color: var(--y3-text-primary);
            transition: color 0.25s ease;
        }
        .y3-card .card-title a:hover {
            color: var(--y3-orange);
        }
        .y3-card .card-text {
            font-size: 15px;
            color: var(--y3-text-secondary);
            margin: 0;
            line-height: 1.75;
            flex: 1;
        }
        .y3-card .card-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px 16px;
            font-size: 13px;
            color: var(--y3-text-muted);
            margin-top: 4px;
        }
        .y3-card .card-meta i {
            margin-right: 4px;
            color: var(--y3-orange);
        }
        .y3-card .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            margin-top: 4px;
        }
        .y3-tag {
            display: inline-block;
            padding: 4px 12px;
            font-size: 12px;
            font-weight: 600;
            border-radius: 20px;
            background-color: var(--y3-warm-grey);
            color: var(--y3-text-secondary);
            border: 1px solid var(--y3-border);
            transition: all 0.25s ease;
        }
        .y3-tag:hover {
            background-color: var(--y3-acid);
            color: var(--y3-charcoal);
            border-color: var(--y3-acid);
        }
        /* 按钮 */
        .btn-y3-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background-color: var(--y3-acid);
            color: var(--y3-charcoal);
            border: none;
            border-radius: var(--y3-radius-sm);
            padding: 14px 28px;
            font-size: 15px;
            font-weight: 700;
            letter-spacing: 0.3px;
            transition: background-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
            text-decoration: none;
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-y3-primary:hover {
            background-color: var(--y3-acid-hover);
            color: var(--y3-charcoal);
            box-shadow: var(--y3-shadow-md);
            transform: translateY(-2px);
        }
        .btn-y3-primary:active {
            transform: translateY(0);
            box-shadow: var(--y3-shadow-sm);
        }
        .btn-y3-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background-color: transparent;
            color: var(--y3-charcoal);
            border: 1.5px solid var(--y3-charcoal);
            border-radius: var(--y3-radius-sm);
            padding: 12px 24px;
            font-size: 15px;
            font-weight: 600;
            letter-spacing: 0.3px;
            transition: all 0.25s ease;
            text-decoration: none;
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-y3-secondary:hover {
            background-color: var(--y3-charcoal);
            color: var(--y3-text-inverse);
            border-color: var(--y3-charcoal);
        }
        .btn-y3-white {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background-color: #FFFFFF;
            color: var(--y3-charcoal);
            border: none;
            border-radius: var(--y3-radius-sm);
            padding: 14px 28px;
            font-size: 15px;
            font-weight: 700;
            letter-spacing: 0.3px;
            transition: background-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
            text-decoration: none;
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-y3-white:hover {
            background-color: var(--y3-acid);
            color: var(--y3-charcoal);
            box-shadow: var(--y3-shadow-md);
            transform: translateY(-2px);
        }
        .btn-y3-outline-light {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background-color: transparent;
            color: #FFFFFF;
            border: 1.5px solid rgba(255,255,255,0.6);
            border-radius: var(--y3-radius-sm);
            padding: 12px 24px;
            font-size: 15px;
            font-weight: 600;
            letter-spacing: 0.3px;
            transition: all 0.25s ease;
            text-decoration: none;
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-y3-outline-light:hover {
            background-color: #FFFFFF;
            color: var(--y3-charcoal);
            border-color: #FFFFFF;
        }
        /* 面包屑 */
        .breadcrumb-y3 {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 6px;
            font-size: 14px;
            color: var(--y3-text-muted);
            margin-bottom: 16px;
            padding: 0;
            list-style: none;
        }
        .breadcrumb-y3 li {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .breadcrumb-y3 li a {
            color: var(--y3-text-muted);
            transition: color 0.25s ease;
        }
        .breadcrumb-y3 li a:hover {
            color: var(--y3-orange);
        }
        .breadcrumb-y3 li .sep {
            color: var(--y3-border);
            font-size: 12px;
        }
        .breadcrumb-y3 li.current {
            color: var(--y3-text-primary);
            font-weight: 600;
        }
        /* 分类头部 */
        .category-header {
            background: linear-gradient(135deg, #FFFFFF 0%, var(--y3-warm-grey) 100%);
            border-bottom: 1px solid var(--y3-border);
            padding: 48px 0 40px;
        }
        .category-header h1 {
            font-size: 34px;
            font-weight: 800;
            color: var(--y3-text-primary);
            margin: 0 0 12px 0;
            line-height: 1.4;
            letter-spacing: 0.5px;
        }
        .category-header .cat-desc {
            font-size: 16px;
            color: var(--y3-text-secondary);
            margin: 0;
            line-height: 1.8;
            max-width: 780px;
        }
        .category-header .cat-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            margin-top: 16px;
            font-size: 14px;
            color: var(--y3-text-muted);
        }
        .category-header .cat-stats span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .category-header .cat-stats i {
            color: var(--y3-acid);
            font-size: 14px;
        }
        .category-header .cat-stats strong {
            color: var(--y3-text-primary);
            font-weight: 700;
            font-size: 16px;
        }
        /* 快速入门步骤 */
        .step-list {
            display: flex;
            flex-direction: column;
            gap: 0;
            position: relative;
            padding-left: 32px;
        }
        .step-list::before {
            content: '';
            position: absolute;
            left: 10px;
            top: 8px;
            bottom: 8px;
            width: 2px;
            background-color: var(--y3-border);
        }
        .step-item {
            position: relative;
            padding: 16px 0 16px 24px;
        }
        .step-item::before {
            content: '';
            position: absolute;
            left: -28px;
            top: 24px;
            width: 12px;
            height: 12px;
            background-color: var(--y3-acid);
            border-radius: 50%;
            border: 2px solid var(--y3-charcoal);
            z-index: 1;
        }
        .step-item .step-number {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            color: var(--y3-orange);
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 4px;
        }
        .step-item h4 {
            font-size: 17px;
            font-weight: 700;
            color: var(--y3-text-primary);
            margin: 0 0 6px 0;
        }
        .step-item p {
            font-size: 15px;
            color: var(--y3-text-secondary);
            margin: 0;
            line-height: 1.7;
        }
        /* 数据面板 */
        .stat-panel {
            background-color: var(--y3-charcoal);
            border-radius: var(--y3-radius-lg);
            padding: 40px;
            color: #FFFFFF;
        }
        .stat-panel .stat-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
        }
        .stat-panel .stat-item {
            text-align: center;
        }
        .stat-panel .stat-value {
            font-size: 36px;
            font-weight: 800;
            font-family: var(--y3-font-mono);
            color: var(--y3-acid);
            line-height: 1.2;
            margin-bottom: 8px;
            letter-spacing: 1px;
        }
        .stat-panel .stat-label {
            font-size: 14px;
            color: rgba(255,255,255,0.7);
            margin: 0;
        }
        /* 表单 */
        .subscribe-form {
            display: flex;
            gap: 12px;
            max-width: 520px;
        }
        .subscribe-form input[type="email"],
        .subscribe-form input[type="text"] {
            flex: 1;
            padding: 14px 18px;
            border: 1.5px solid var(--y3-border);
            border-radius: var(--y3-radius-sm);
            background-color: #FFFFFF;
            font-size: 15px;
            color: var(--y3-text-primary);
            transition: border-color 0.25s ease, box-shadow 0.25s ease;
            min-width: 0;
        }
        .subscribe-form input:focus {
            outline: none;
            border-color: var(--y3-acid);
            box-shadow: 0 0 0 3px rgba(198,241,53,0.25);
        }
        /* FAQ */
        .faq-section {
            background-color: var(--y3-warm-grey);
            padding: var(--y3-section-padding) 0;
        }
        .accordion-y3 {
            border: 1px solid var(--y3-border);
            border-radius: var(--y3-radius-md);
            overflow: hidden;
            background-color: #FFFFFF;
            box-shadow: var(--y3-shadow-sm);
        }
        .accordion-y3 .accordion-item {
            border: none;
            border-bottom: 1px solid var(--y3-border);
        }
        .accordion-y3 .accordion-item:last-child {
            border-bottom: none;
        }
        .accordion-y3 .accordion-header {
            margin: 0;
        }
        .accordion-y3 .accordion-button {
            background-color: #FFFFFF;
            color: var(--y3-text-primary);
            font-weight: 700;
            font-size: 16px;
            padding: 18px 24px;
            border: none;
            border-radius: 0;
            box-shadow: none;
            transition: background-color 0.25s ease, color 0.25s ease;
        }
        .accordion-y3 .accordion-button:not(.collapsed) {
            background-color: var(--y3-warm-grey);
            color: var(--y3-text-primary);
            box-shadow: none;
        }
        .accordion-y3 .accordion-button:focus {
            box-shadow: none;
            outline: 2px solid var(--y3-acid);
            outline-offset: -2px;
        }
        .accordion-y3 .accordion-button::after {
            background-size: 16px;
            width: 16px;
            height: 16px;
        }
        .accordion-y3 .accordion-body {
            padding: 18px 24px;
            font-size: 15px;
            color: var(--y3-text-secondary);
            line-height: 1.8;
            background-color: #FFFFFF;
        }
        /* CTA 深色区块 */
        .cta-dark {
            background-color: var(--y3-charcoal);
            padding: 64px 0;
            color: #FFFFFF;
            text-align: center;
        }
        .cta-dark h2 {
            font-size: 30px;
            font-weight: 800;
            color: #FFFFFF;
            margin: 0 0 16px 0;
        }
        .cta-dark p {
            font-size: 16px;
            color: rgba(255,255,255,0.75);
            max-width: 640px;
            margin: 0 auto 28px;
            line-height: 1.8;
        }
        .cta-dark .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        /* 底部品牌带 */
        .brand-strip {
            background-color: var(--y3-warm-grey);
            padding: 32px 0;
            border-top: 1px solid var(--y3-border);
            text-align: center;
        }
        .brand-strip .slogan {
            font-size: 18px;
            font-weight: 700;
            color: var(--y3-text-primary);
            margin: 0 0 6px 0;
        }
        .brand-strip .explain {
            font-size: 14px;
            color: var(--y3-text-muted);
            margin: 0;
        }
        /* 页脚 */
        .site-footer {
            background-color: var(--y3-charcoal);
            color: rgba(255,255,255,0.75);
            padding: 56px 0 0;
        }
        .site-footer .footer-brand {
            font-size: 22px;
            font-weight: 800;
            color: #FFFFFF;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }
        .site-footer .footer-desc {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255,255,255,0.65);
            max-width: 360px;
        }
        .site-footer .footer-heading {
            font-size: 15px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .site-footer .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .site-footer .footer-links li {
            margin-bottom: 8px;
        }
        .site-footer .footer-links a {
            color: rgba(255,255,255,0.65);
            font-size: 14px;
            transition: color 0.25s ease;
        }
        .site-footer .footer-links a:hover {
            color: var(--y3-acid);
        }
        .footer-bottom {
            background-color: #151619;
            padding: 16px 0;
            margin-top: 40px;
            border-top: 1px solid rgba(255,255,255,0.08);
            font-size: 13px;
            color: rgba(255,255,255,0.5);
        }
        .footer-bottom .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px 20px;
        }
        .footer-bottom a {
            color: rgba(255,255,255,0.6);
            transition: color 0.25s ease;
        }
        .footer-bottom a:hover {
            color: var(--y3-acid);
        }
        /* 响应式 */
        @media (max-width: 991px) {
            .navbar-toggler {
                display: block;
            }
            .nav-menu-desktop {
                display: none;
            }
            .stat-panel .stat-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
            .stat-panel {
                padding: 32px 24px;
            }
            .stat-panel .stat-value {
                font-size: 28px;
            }
        }
        @media (max-width: 767px) {
            :root {
                --y3-section-padding: 48px;
            }
            .section-block {
                padding: 48px 0;
            }
            .category-header {
                padding: 36px 0 28px;
            }
            .category-header h1 {
                font-size: 28px;
            }
            .category-header .cat-desc {
                font-size: 15px;
            }
            .category-header .cat-stats {
                gap: 16px;
                flex-wrap: wrap;
            }
            .stat-panel .stat-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .stat-panel .stat-value {
                font-size: 24px;
            }
            .subscribe-form {
                flex-direction: column;
            }
            .cta-dark h2 {
                font-size: 24px;
            }
            .cta-dark {
                padding: 48px 0;
            }
            .brand-strip .slogan {
                font-size: 16px;
            }
            .site-footer {
                padding: 40px 0 0;
            }
            .footer-bottom .container {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }
            .step-list {
                padding-left: 24px;
            }
            .step-item {
                padding-left: 16px;
            }
            .step-item::before {
                left: -21px;
            }
            .top-info-bar .region-switch {
                display: none;
            }
            .top-info-bar .container {
                justify-content: space-between;
            }
        }
        @media (max-width: 575px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .category-header h1 {
                font-size: 24px;
            }
            .stat-panel .stat-grid {
                grid-template-columns: 1fr;
                gap: 16px;
                text-align: center;
            }
            .stat-panel {
                padding: 24px 16px;
            }
            .y3-card .card-body {
                padding: 18px;
            }
            .btn-y3-primary,
            .btn-y3-white {
                padding: 12px 20px;
                font-size: 14px;
            }
            .btn-y3-secondary,
            .btn-y3-outline-light {
                padding: 10px 18px;
                font-size: 14px;
            }
            .section-heading h2 {
                font-size: 24px;
            }
            .step-item h4 {
                font-size: 16px;
            }
        }

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}