/* roulang page: index */
:root {
    --primary: #0b1f3a;
    --primary-light: #142e4f;
    --primary-dark: #071526;
    --accent: #e8a33d;
    --accent-hover: #d18f2c;
    --accent-soft: #fdf3e3;
    --bg: #f4f6fa;
    --bg-white: #ffffff;
    --bg-dark: #0b1f3a;
    --text: #17233a;
    --text-muted: #5e6e82;
    --border: #e2e8f0;
    --radius: 18px;
    --radius-sm: 10px;
    --shadow: 0 4px 20px rgba(11, 31, 58, 0.06);
    --shadow-lg: 0 14px 44px rgba(11, 31, 58, 0.12);
    --transition: all 0.3s ease;
}
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
html {
    scroll-behavior: smooth;
}
body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.65;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
}
a {
    color: inherit;
    text-decoration: none;
}
img {
    max-width: 100%;
    display: block;
}
ul,
ol {
    list-style: none;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 13px 30px;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    line-height: 1.4;
    white-space: nowrap;
}
.btn-primary {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 6px 18px rgba(232, 163, 61, 0.28);
}
.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 28px rgba(232, 163, 61, 0.36);
}
.btn-outline {
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255, 255, 255, 0.72);
}
.btn-outline:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: #fff;
    transform: translateY(-2px);
}
.btn-solid {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 6px 18px rgba(11, 31, 58, 0.2);
}
.btn-solid:hover {
    background: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: 0 10px 28px rgba(11, 31, 58, 0.3);
}
.section-head {
    text-align: center;
    max-width: 680px;
    margin: 0 auto 56px;
}
.section-head .tag {
    display: inline-block;
    background: var(--accent-soft);
    color: var(--accent-hover);
    font-size: 13px;
    font-weight: 600;
    padding: 6px 18px;
    border-radius: 30px;
    margin-bottom: 14px;
    letter-spacing: 1px;
}
.section-head h2 {
    font-size: 34px;
    line-height: 1.3;
    color: var(--primary);
    font-weight: 700;
    margin-bottom: 12px;
}
.section-head p {
    color: var(--text-muted);
    font-size: 16px;
    line-height: 1.6;
}
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    gap: 20px;
}
.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}
.logo-icon {
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, var(--accent), #f4c56a);
    border-radius: 12px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 20px;
    color: #fff;
    box-shadow: 0 4px 12px rgba(232, 163, 61, 0.3);
}
.logo-text {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: 0.5px;
    white-space: nowrap;
}
.nav-menu {
    display: flex;
    align-items: center;
    gap: 6px;
}
.nav-link {
    color: var(--text);
    font-size: 15px;
    font-weight: 500;
    padding: 9px 18px;
    border-radius: 24px;
    transition: var(--transition);
    position: relative;
}
.nav-link:hover {
    color: var(--accent);
    background: var(--accent-soft);
}
.nav-link.active {
    color: var(--accent);
    background: var(--accent-soft);
    font-weight: 600;
}
.nav-toggle {
    display: none;
    width: 44px;
    height: 44px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    cursor: pointer;
    transition: var(--transition);
}
.nav-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
    transition: var(--transition);
}
.nav-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}
.hero {
    position: relative;
    background-image: url('/assets/images/backpic/back-1.png');
    background-size: cover;
    background-position: center;
    min-height: 720px;
    display: flex;
    align-items: center;
    padding: 100px 0 80px;
}
.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(7, 21, 38, 0.92) 0%, rgba(11, 31, 58, 0.78) 55%, rgba(20, 46, 79, 0.6) 100%);
}
.hero-content {
    position: relative;
    z-index: 2;
    max-width: 860px;
    margin: 0 auto;
    text-align: center;
    color: #fff;
}
.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.14);
    border: 1px solid rgba(255, 255, 255, 0.22);
    padding: 8px 22px;
    border-radius: 40px;
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 1px;
    margin-bottom: 28px;
    backdrop-filter: blur(6px);
}
.hero-tag i {
    color: var(--accent);
}
.hero-title {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: 1px;
    margin-bottom: 20px;
    text-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}
.hero-title span {
    color: var(--accent);
}
.hero-desc {
    font-size: 18px;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.85);
    max-width: 680px;
    margin: 0 auto 38px;
}
.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 60px;
}
.hero-metrics {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
    padding-top: 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.16);
}
.metric {
    text-align: center;
    padding: 0 24px;
}
.metric-num {
    font-size: 32px;
    font-weight: 800;
    color: var(--accent);
    display: block;
    line-height: 1.2;
}
.metric-label {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    margin-top: 4px;
    display: block;
    letter-spacing: 1px;
}
.intro {
    padding: 100px 0;
    background: var(--bg-white);
}
.intro-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 70px;
    align-items: center;
}
.intro-media {
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}
.intro-media img {
    width: 100%;
    height: 440px;
    object-fit: cover;
    transition: transform 0.6s ease;
}
.intro-media:hover img {
    transform: scale(1.03);
}
.intro-media::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(11, 31, 58, 0.25), transparent 60%);
    pointer-events: none;
}
.intro-badge {
    position: absolute;
    left: 24px;
    bottom: 24px;
    z-index: 2;
    background: rgba(255, 255, 255, 0.92);
    border-radius: 14px;
    padding: 14px 22px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
    backdrop-filter: blur(4px);
}
.intro-badge .num {
    font-size: 26px;
    font-weight: 800;
    color: var(--primary);
    display: block;
    line-height: 1.2;
}
.intro-badge .label {
    font-size: 12px;
    color: var(--text-muted);
    letter-spacing: 1px;
}
.intro-content .tag {
    display: inline-block;
    background: var(--accent-soft);
    color: var(--accent-hover);
    font-size: 13px;
    font-weight: 600;
    padding: 6px 18px;
    border-radius: 30px;
    margin-bottom: 16px;
}
.intro-content h2 {
    font-size: 36px;
    line-height: 1.25;
    color: var(--primary);
    font-weight: 700;
    margin-bottom: 20px;
}
.intro-content p {
    color: var(--text-muted);
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 24px;
}
.intro-list {
    margin-bottom: 30px;
}
.intro-list li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 8px 0;
    font-size: 15px;
    color: var(--text);
}
.intro-list li i {
    color: var(--accent);
    font-size: 18px;
    margin-top: 3px;
    flex-shrink: 0;
}
.categories {
    padding: 100px 0;
    background: var(--bg);
}
.categories-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}
.category-card {
    background: var(--bg-white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    border: 1px solid var(--border);
}
.category-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}
.category-card .card-img {
    height: 200px;
    overflow: hidden;
    position: relative;
}
.category-card .card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}
.category-card:hover .card-img img {
    transform: scale(1.05);
}
.category-card .card-img::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(11, 31, 58, 0.35), transparent 70%);
}
.card-body {
    padding: 28px 26px 30px;
}
.card-body h3 {
    font-size: 21px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 12px;
    transition: var(--transition);
}
.category-card:hover .card-body h3 {
    color: var(--accent);
}
.card-body p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.65;
    margin-bottom: 20px;
}
.card-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--accent);
    font-size: 14px;
    font-weight: 600;
    transition: var(--transition);
}
.card-link i {
    transition: transform 0.3s ease;
}
.category-card:hover .card-link i {
    transform: translateX(6px);
}
.stats {
    position: relative;
    background-image: url('/assets/images/backpic/back-2.png');
    background-size: cover;
    background-position: center;
    padding: 100px 0;
}
.stats::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(7, 21, 38, 0.94), rgba(11, 31, 58, 0.86));
}
.stats .container {
    position: relative;
    z-index: 2;
}
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
}
.stat-item {
    text-align: center;
    padding: 20px 10px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(4px);
    transition: var(--transition);
}
.stat-item:hover {
    background: rgba(255, 255, 255, 0.12);
    transform: translateY(-4px);
}
.stat-num {
    font-size: 40px;
    font-weight: 800;
    color: var(--accent);
    display: block;
    line-height: 1.2;
    margin-bottom: 8px;
}
.stat-label {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.78);
    letter-spacing: 1px;
}
.news {
    padding: 100px 0;
    background: var(--bg-white);
}
.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}
.news-card {
    background: var(--bg);
    border-radius: var(--radius);
    padding: 28px;
    border: 1px solid var(--border);
    transition: var(--transition);
    display: block;
    height: 100%;
    position: relative;
}
.news-card:hover {
    background: var(--bg-white);
    box-shadow: var(--shadow-lg);
    transform: translateY(-6px);
    border-color: transparent;
}
.news-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 16px;
}
.news-cat {
    background: var(--accent-soft);
    color: var(--accent-hover);
    font-size: 12px;
    font-weight: 600;
    padding: 4px 14px;
    border-radius: 20px;
    letter-spacing: 0.5px;
}
.news-date {
    font-size: 13px;
    color: var(--text-muted);
}
.news-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary);
    line-height: 1.45;
    margin-bottom: 12px;
    transition: var(--transition);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.news-card:hover h3 {
    color: var(--accent);
}
.news-card p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 20px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.news-more {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
    transition: var(--transition);
}
.news-card:hover .news-more {
    color: var(--accent);
    gap: 12px;
}
.empty-tip {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px 30px;
    background: var(--bg);
    border-radius: var(--radius);
    color: var(--text-muted);
    font-size: 16px;
}
.features {
    padding: 100px 0;
    background: var(--bg);
}
.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 28px;
}
.feature-card {
    background: var(--bg-white);
    border-radius: var(--radius);
    padding: 36px 28px;
    border: 1px solid var(--border);
    transition: var(--transition);
    text-align: left;
}
.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}
.feature-icon {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    background: var(--accent-soft);
    color: var(--accent);
    font-size: 26px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    transition: var(--transition);
}
.feature-card:hover .feature-icon {
    background: var(--accent);
    color: #fff;
    transform: rotate(-6deg) scale(1.05);
}
.feature-card h3 {
    font-size: 19px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 12px;
}
.feature-card p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.65;
}
.faq {
    padding: 100px 0;
    background: var(--bg-white);
}
.faq-list {
    max-width: 840px;
    margin: 0 auto;
}
.faq-item {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 16px;
    background: var(--bg);
    transition: var(--transition);
    overflow: hidden;
}
.faq-item:hover {
    border-color: #d0d9e4;
}
.faq-item details {
    padding: 0;
}
.faq-item summary {
    list-style: none;
    cursor: pointer;
    padding: 24px 54px 24px 30px;
    font-size: 17px;
    font-weight: 600;
    color: var(--primary);
    position: relative;
    line-height: 1.5;
    transition: var(--transition);
}
.faq-item summary::-webkit-details-marker {
    display: none;
}
.faq-item summary::after {
    content: '+';
    position: absolute;
    right: 26px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 26px;
    font-weight: 400;
    color: var(--accent);
    transition: transform 0.3s ease;
}
.faq-item details[open] summary {
    color: var(--accent);
}
.faq-item details[open] summary::after {
    content: '−';
    transform: translateY(-50%) rotate(360deg);
}
.faq-item .faq-answer {
    padding: 0 30px 28px;
    color: var(--text-muted);
    font-size: 15px;
    line-height: 1.75;
    border-top: 1px dashed var(--border);
    margin: 0 30px;
    padding-left: 0;
    padding-right: 0;
    padding-top: 18px;
}
.cta {
    position: relative;
    background-image: url('/assets/images/backpic/back-3.png');
    background-size: cover;
    background-position: center;
    padding: 120px 0;
}
.cta::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(120deg, rgba(7, 21, 38, 0.92), rgba(11, 31, 58, 0.7));
}
.cta-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: #fff;
    max-width: 720px;
    margin: 0 auto;
}
.cta-content h2 {
    font-size: 40px;
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: 18px;
}
.cta-content p {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 40px;
    line-height: 1.7;
}
.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}
.site-footer {
    background: var(--primary-dark);
    color: rgba(255, 255, 255, 0.75);
    padding: 80px 0 0;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.6fr 1fr 1fr;
    gap: 60px;
    padding-bottom: 56px;
}
.footer-brand .footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}
.footer-brand .logo-text {
    color: #fff;
}
.footer-brand p {
    font-size: 14px;
    line-height: 1.75;
    color: rgba(255, 255, 255, 0.6);
    max-width: 340px;
}
.footer-col h4 {
    font-size: 16px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 20px;
    letter-spacing: 1px;
}
.footer-col a {
    display: block;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    padding: 6px 0;
    transition: var(--transition);
}
.footer-col a:hover {
    color: var(--accent);
    padding-left: 6px;
}
.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 24px 0;
    text-align: center;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.5);
}
.footer-bottom a {
    color: rgba(255, 255, 255, 0.6);
    transition: var(--transition);
}
.footer-bottom a:hover {
    color: var(--accent);
}
@media (max-width: 1024px) {
    .categories-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .hero {
        min-height: 640px;
        padding: 80px 0 60px;
    }
    .hero-title {
        font-size: 44px;
    }
    .intro-grid {
        gap: 40px;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }
}
@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }
    .nav-menu {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        align-items: stretch;
        padding: 16px 24px 24px;
        border-bottom: 1px solid var(--border);
        box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
        gap: 8px;
        border-radius: 0 0 20px 20px;
    }
    .nav-menu.open {
        display: flex;
    }
    .nav-link {
        padding: 14px 20px;
        border-radius: 12px;
        font-size: 16px;
    }
    .intro-grid {
        grid-template-columns: 1fr;
    }
    .intro-media img {
        height: 320px;
    }
    .hero {
        min-height: 560px;
    }
    .hero-title {
        font-size: 34px;
    }
    .hero-desc {
        font-size: 16px;
    }
    .hero-metrics {
        gap: 16px;
        padding-top: 28px;
    }
    .metric {
        padding: 0 14px;
    }
    .metric-num {
        font-size: 26px;
    }
    .section-head h2 {
        font-size: 28px;
    }
    .section-head p {
        font-size: 15px;
    }
    .categories-grid,
    .news-grid,
    .features-grid {
        grid-template-columns: 1fr;
    }
    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 20px;
    }
    .stat-num {
        font-size: 30px;
    }
    .intro-content h2 {
        font-size: 28px;
    }
    .cta-content h2 {
        font-size: 30px;
    }
    .cta-content p {
        font-size: 16px;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 36px;
    }
    .cta {
        padding: 80px 0;
    }
}
@media (max-width: 520px) {
    .container {
        padding: 0 20px;
    }
    .header-inner {
        height: 64px;
    }
    .nav-menu {
        top: 64px;
    }
    .logo-text {
        font-size: 16px;
    }
    .logo-icon {
        width: 38px;
        height: 38px;
        font-size: 18px;
    }
    .hero {
        min-height: 520px;
        padding: 60px 0 50px;
    }
    .hero-title {
        font-size: 28px;
    }
    .hero-desc {
        font-size: 15px;
    }
    .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: 12px;
    }
    .hero-buttons .btn {
        width: 100%;
        justify-content: center;
    }
    .hero-metrics {
        flex-direction: column;
        gap: 18px;
    }
    .metric {
        padding: 0;
    }
    .card-body {
        padding: 22px 20px 24px;
    }
    .section-head {
        margin-bottom: 36px;
    }
    .intro,
    .categories,
    .stats,
    .news,
    .features,
    .faq {
        padding: 60px 0;
    }
    .faq-item summary {
        font-size: 15px;
        padding: 20px 46px 20px 20px;
    }
    .faq-item summary::after {
        right: 18px;
    }
    .faq-item .faq-answer {
        font-size: 14px;
        padding: 0 20px 22px;
        margin: 0 20px;
    }
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    .cta-buttons .btn {
        width: 100%;
        justify-content: center;
    }
    .footer-bottom {
        padding: 20px 16px;
        font-size: 13px;
    }
}

/* roulang page: article */
:root {
  --primary: #0057ff;
  --primary-dark: #0043cc;
  --primary-600: #1f6fff;
  --primary-050: #f0f5ff;
  --accent: #00d4a7;
  --accent-dark: #00b087;
  --dark: #0d1b38;
  --dark-800: #15264d;
  --ink: #1b2a45;
  --text: #334155;
  --muted: #68788d;
  --line: #e5ebf3;
  --bg-soft: #f5f8fc;
  --white: #ffffff;
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 22px;
  --shadow-sm: 0 2px 10px rgba(13, 27, 56, 0.06);
  --shadow: 0 10px 34px rgba(13, 27, 56, 0.1);
  --shadow-lg: 0 22px 60px rgba(13, 27, 56, 0.16);
  --transition: all 0.25s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--white);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

img {
  max-width: 100%;
  display: block;
  border-radius: var(--radius);
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  border: 2px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  line-height: 1.2;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 87, 255, 0.28);
}

.btn-light {
  background: #fff;
  color: var(--primary);
}

.btn-light:hover {
  background: var(--primary-050);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255, 255, 255, 0.22);
}

.btn-outline-light {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.45);
}

.btn-outline-light:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.8);
  transform: translateY(-2px);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
}

.tag {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  background: var(--primary-050);
  color: var(--primary);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(229, 235, 243, 0.8);
  box-shadow: 0 2px 18px rgba(13, 27, 56, 0.04);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  font-size: 20px;
  font-weight: 800;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  letter-spacing: 0;
  box-shadow: 0 4px 14px rgba(0, 87, 255, 0.3);
}

.logo-text {
  font-size: 20px;
  font-weight: 800;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  position: relative;
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  transition: var(--transition);
}

.nav-link:hover {
  color: var(--primary);
  background: var(--primary-050);
}

.nav-link.active {
  color: var(--primary);
  background: var(--primary-050);
  font-weight: 600;
}

.nav-link.active::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 2px;
  transform: translateX(-50%);
  width: 18px;
  height: 3px;
  border-radius: 3px;
  background: var(--primary);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  padding: 10px;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 10px;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: var(--transition);
}

.nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.article-hero {
  position: relative;
  padding: 72px 0 60px;
  background-size: cover;
  background-position: center;
  color: #fff;
  overflow: hidden;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(9, 22, 45, 0.94) 0%, rgba(13, 41, 90, 0.82) 55%, rgba(0, 87, 255, 0.55) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 980px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.72);
  margin-bottom: 18px;
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.85);
}

.breadcrumb a:hover {
  color: #fff;
  text-decoration: underline;
}

.breadcrumb .sep {
  opacity: 0.5;
}

.breadcrumb .current {
  color: rgba(255, 255, 255, 0.95);
  max-width: 320px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.category-badge {
  background: rgba(255, 255, 255, 0.18);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(6px);
  margin-bottom: 18px;
}

.hero-content h1 {
  font-size: clamp(1.75rem, 3.4vw, 2.6rem);
  line-height: 1.3;
  font-weight: 800;
  color: #fff;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.78);
}

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

.article-meta i {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.6);
}

.article-section {
  padding: 56px 0 60px;
  background: var(--white);
}

.article-layout {
  max-width: 860px;
  margin: 0 auto;
}

.article-body {
  font-size: 16px;
  line-height: 1.9;
  color: var(--text);
}

.article-body h2,
.article-body h3,
.article-body h4,
.article-body h5,
.article-body h6 {
  color: var(--ink);
  font-weight: 700;
  margin: 1.8em 0 0.8em;
  line-height: 1.4;
}

.article-body h2 {
  font-size: 24px;
  padding-left: 14px;
  border-left: 4px solid var(--primary);
  border-radius: 4px;
}

.article-body h3 {
  font-size: 20px;
}

.article-body p {
  margin-bottom: 1.4em;
}

.article-body ul,
.article-body ol {
  margin: 1.2em 0 1.4em;
  padding-left: 1.5em;
}

.article-body li {
  margin-bottom: 0.5em;
}

.article-body blockquote {
  border-left: 4px solid var(--primary);
  background: var(--primary-050);
  padding: 1.1em 1.4em;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 1.6em 0;
  color: var(--ink);
  font-style: normal;
}

.article-body blockquote p:last-child {
  margin-bottom: 0;
}

.article-body img {
  border-radius: var(--radius);
  margin: 1.6em 0;
  box-shadow: var(--shadow-sm);
}

.article-body a {
  color: var(--primary);
  font-weight: 500;
}

.article-body a:hover {
  text-decoration: underline;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.6em 0;
  font-size: 15px;
}

.article-body th,
.article-body td {
  border: 1px solid var(--line);
  padding: 0.7em 1em;
  text-align: left;
}

.article-body th {
  background: var(--bg-soft);
  color: var(--ink);
  font-weight: 600;
}

.article-body code {
  background: #f1f5f9;
  padding: 0.2em 0.5em;
  border-radius: 4px;
  font-size: 0.9em;
  color: var(--primary-dark);
}

.article-body pre {
  background: var(--dark);
  color: #e2e8f0;
  padding: 1.2em 1.4em;
  border-radius: var(--radius-sm);
  overflow-x: auto;
  margin: 1.6em 0;
  line-height: 1.7;
}

.article-body pre code {
  background: transparent;
  color: inherit;
  padding: 0;
}

.not-found-box {
  text-align: center;
  padding: 60px 20px;
  background: var(--bg-soft);
  border-radius: var(--radius-lg);
  border: 1px dashed var(--line);
}

.not-found-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 72px;
  height: 72px;
  background: var(--primary-050);
  color: var(--primary);
  font-size: 28px;
  border-radius: 50%;
  margin-bottom: 18px;
}

.not-found-box h2 {
  font-size: 28px;
  color: var(--ink);
  margin-bottom: 10px;
}

.not-found-box p {
  color: var(--muted);
  margin-bottom: 24px;
}

.related-section {
  padding: 56px 0;
  background: var(--bg-soft);
}

.section-title {
  font-size: 28px;
  font-weight: 800;
  color: var(--ink);
  text-align: center;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.section-subtitle {
  text-align: center;
  color: var(--muted);
  margin-bottom: 36px;
  font-size: 15px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.related-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--line);
  transition: var(--transition);
  display: block;
}

.related-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.related-card img {
  width: 100%;
  height: 170px;
  object-fit: cover;
  border-radius: 0;
}

.related-info {
  padding: 20px 22px 24px;
}

.related-info .tag {
  margin-bottom: 12px;
}

.related-info h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.45;
  transition: var(--transition);
}

.related-card:hover .related-info h3 {
  color: var(--primary);
}

.cta-section {
  padding: 64px 0;
  background: var(--white);
}

.cta-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  flex-wrap: wrap;
  background: linear-gradient(135deg, var(--dark) 0%, var(--primary-dark) 100%);
  border-radius: var(--radius-lg);
  padding: 42px 48px;
  color: #fff;
  position: relative;
  overflow: hidden;
}

.cta-card::before {
  content: "";
  position: absolute;
  right: -60px;
  top: -60px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
}

.cta-card::after {
  content: "";
  position: absolute;
  right: 30px;
  bottom: -80px;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: rgba(0, 212, 167, 0.16);
}

.cta-info {
  position: relative;
  z-index: 1;
  flex: 1;
  min-width: 260px;
}

.cta-info h2 {
  font-size: 26px;
  font-weight: 800;
  margin-bottom: 8px;
}

.cta-info p {
  color: rgba(255, 255, 255, 0.78);
  font-size: 15px;
}

.cta-actions {
  position: relative;
  z-index: 1;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.site-footer {
  background: var(--dark);
  color: rgba(255, 255, 255, 0.7);
  padding: 56px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.8fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
}

.footer-brand .footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.footer-brand .logo-icon {
  background: linear-gradient(135deg, var(--primary), var(--accent));
}

.footer-brand .logo-text {
  color: #fff;
  font-size: 20px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.6);
  max-width: 360px;
}

.footer-col h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  padding: 5px 0;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  transition: var(--transition);
}

.footer-col a:hover {
  color: #fff;
  padding-left: 6px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 20px 0;
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.6);
}

.footer-bottom a:hover {
  color: #fff;
}

@media (max-width: 1024px) {
  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .cta-card {
    padding: 36px;
  }
  .article-hero {
    padding: 60px 0 48px;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    align-items: stretch;
    padding: 16px 24px 24px;
    gap: 6px;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 20px 40px rgba(13, 27, 56, 0.12);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
  }
  .nav-menu.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav-link {
    padding: 12px 18px;
    font-size: 16px;
  }
  .nav-link.active::after {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
  .hero-content h1 {
    font-size: 1.55rem;
  }
  .article-meta {
    gap: 12px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .cta-card {
    flex-direction: column;
    align-items: flex-start;
    padding: 32px 28px;
  }
  .cta-actions {
    width: 100%;
  }
  .cta-actions .btn {
    flex: 1;
  }
}

@media (max-width: 520px) {
  .container {
    padding: 0 18px;
  }
  .logo-text {
    font-size: 17px;
  }
  .logo-icon {
    width: 34px;
    height: 34px;
    font-size: 18px;
  }
  .header-inner {
    height: 64px;
  }
  .nav-menu {
    top: 64px;
  }
  .article-hero {
    padding: 48px 0 40px;
  }
  .hero-content h1 {
    font-size: 1.35rem;
  }
  .article-meta {
    font-size: 13px;
  }
  .related-grid {
    grid-template-columns: 1fr;
  }
  .related-card img {
    height: 200px;
  }
  .section-title {
    font-size: 24px;
  }
  .cta-info h2 {
    font-size: 22px;
  }
  .article-body {
    font-size: 15px;
  }
  .article-body h2 {
    font-size: 20px;
  }
  .btn {
    padding: 10px 20px;
    font-size: 14px;
  }
}

/* roulang page: category1 */
:root {
    --primary: #0d47a1;
    --primary-dark: #082e6b;
    --primary-light: #1565c0;
    --accent: #ff8f00;
    --accent-light: #ffb300;
    --accent-dark: #e67e00;
    --bg: #f4f6fb;
    --white: #ffffff;
    --text: #16233c;
    --text-light: #64748b;
    --text-lighter: #8a97ad;
    --border: #e2e8f0;
    --radius: 18px;
    --radius-sm: 10px;
    --radius-lg: 26px;
    --shadow: 0 6px 24px rgba(13, 71, 161, 0.08);
    --shadow-lg: 0 14px 44px rgba(13, 71, 161, 0.14);
    --shadow-accent: 0 8px 28px rgba(255, 143, 0, 0.25);
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { font-family: var(--font-family); background: var(--bg); color: var(--text); line-height: 1.7; font-size: 16px; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
button { font-family: inherit; border: none; cursor: pointer; background: none; }
ul, ol { list-style: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 88px 0; }
.section-head { text-align: center; max-width: 680px; margin: 0 auto 48px; }
.section-tag { display: inline-flex; align-items: center; gap: 8px; background: rgba(13, 71, 161, 0.08); color: var(--primary); font-size: 13px; font-weight: 600; padding: 6px 16px; border-radius: 40px; letter-spacing: 0.5px; margin-bottom: 16px; }
.section-tag i { font-size: 12px; }
.section-title { font-size: 34px; font-weight: 800; line-height: 1.3; letter-spacing: -0.5px; color: var(--text); }
.section-subtitle { font-size: 16px; color: var(--text-light); margin-top: 12px; }
/* ===== Header / Nav ===== */
.site-header { position: sticky; top: 0; z-index: 1000; background: rgba(255, 255, 255, 0.92); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); border-bottom: 1px solid rgba(226, 232, 240, 0.8); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 76px; gap: 24px; }
.nav-logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-icon { width: 40px; height: 40px; background: linear-gradient(135deg, var(--primary), var(--primary-light)); color: #fff; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: 22px; box-shadow: 0 4px 14px rgba(13, 71, 161, 0.25); }
.logo-text { font-size: 18px; font-weight: 700; color: var(--text); letter-spacing: -0.3px; white-space: nowrap; }
.nav-menu { display: flex; align-items: center; gap: 8px; }
.nav-link { padding: 9px 18px; border-radius: 40px; font-size: 15px; font-weight: 500; color: var(--text-light); transition: var(--transition); }
.nav-link:hover { color: var(--primary); background: rgba(13, 71, 161, 0.07); }
.nav-link.active { color: var(--white); background: linear-gradient(135deg, var(--primary), var(--primary-light)); box-shadow: 0 4px 16px rgba(13, 71, 161, 0.3); font-weight: 600; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; width: 44px; height: 44px; align-items: center; justify-content: center; border-radius: 10px; background: rgba(13, 71, 161, 0.06); transition: var(--transition); }
.nav-toggle span { display: block; width: 20px; height: 2px; background: var(--text); border-radius: 2px; transition: var(--transition); }
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
/* ===== Page Hero ===== */
.page-hero { position: relative; padding: 100px 0 96px; background: linear-gradient(135deg, rgba(8, 46, 107, 0.94), rgba(13, 71, 161, 0.86)), url('/assets/images/backpic/back-1.png') center/cover no-repeat; color: #fff; overflow: hidden; }
.page-hero::before { content: ''; position: absolute; top: -60px; right: -80px; width: 320px; height: 320px; border-radius: 50%; background: rgba(255, 143, 0, 0.12); filter: blur(60px); }
.page-hero::after { content: ''; position: absolute; bottom: -40px; left: 10%; width: 260px; height: 260px; border-radius: 50%; background: rgba(255, 255, 255, 0.05); filter: blur(50px); }
.hero-content { position: relative; z-index: 2; max-width: 760px; }
.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 14px; color: rgba(255, 255, 255, 0.7); margin-bottom: 18px; }
.breadcrumb a { color: rgba(255, 255, 255, 0.7); }
.breadcrumb a:hover { color: var(--accent-light); }
.breadcrumb i { font-size: 10px; color: rgba(255, 255, 255, 0.5); }
.hero-badge { display: inline-flex; align-items: center; gap: 8px; background: rgba(255, 255, 255, 0.14); border: 1px solid rgba(255, 255, 255, 0.18); padding: 7px 18px; border-radius: 40px; font-size: 13px; font-weight: 500; letter-spacing: 0.5px; color: rgba(255, 255, 255, 0.9); margin-bottom: 22px; backdrop-filter: blur(6px); }
.hero-badge i { color: var(--accent-light); }
.hero-title { font-size: 44px; font-weight: 800; line-height: 1.25; letter-spacing: -0.5px; margin-bottom: 20px; }
.hero-title span { color: var(--accent-light); }
.hero-desc { font-size: 18px; line-height: 1.8; color: rgba(255, 255, 255, 0.85); margin-bottom: 34px; max-width: 620px; }
.hero-buttons { display: flex; gap: 14px; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 13px 28px; border-radius: 50px; font-size: 15px; font-weight: 600; line-height: 1.4; transition: var(--transition); }
.btn i { font-size: 14px; }
.btn-primary { background: linear-gradient(135deg, var(--accent), var(--accent-dark)); color: #fff; box-shadow: var(--shadow-accent); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 34px rgba(255, 143, 0, 0.35); color: #fff; }
.btn-outline { background: rgba(255, 255, 255, 0.12); border: 1px solid rgba(255, 255, 255, 0.25); color: #fff; backdrop-filter: blur(4px); }
.btn-outline:hover { background: rgba(255, 255, 255, 0.22); border-color: rgba(255, 255, 255, 0.4); transform: translateY(-2px); color: #fff; }
.hero-stats { display: flex; gap: 40px; margin-top: 48px; flex-wrap: wrap; }
.hero-stat { display: flex; flex-direction: column; }
.hero-stat-num { font-size: 30px; font-weight: 800; color: #fff; line-height: 1.2; }
.hero-stat-num small { font-size: 16px; font-weight: 500; color: rgba(255, 255, 255, 0.75); margin-left: 2px; }
.hero-stat-label { font-size: 13px; color: rgba(255, 255, 255, 0.65); margin-top: 4px; }
/* ===== Filter Bar ===== */
.filter-section { padding: 56px 0 8px; }
.filter-bar { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
.filter-btn { padding: 10px 22px; border-radius: 40px; font-size: 14px; font-weight: 500; background: var(--white); border: 1px solid var(--border); color: var(--text-light); transition: var(--transition); }
.filter-btn:hover { border-color: var(--primary-light); color: var(--primary); transform: translateY(-2px); box-shadow: var(--shadow); }
.filter-btn.active { background: linear-gradient(135deg, var(--primary), var(--primary-light)); color: #fff; border-color: transparent; box-shadow: 0 4px 16px rgba(13, 71, 161, 0.3); }
/* ===== News Grid ===== */
.news-section { padding: 48px 0 80px; }
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.news-card { background: var(--white); border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border); box-shadow: var(--shadow); transition: var(--transition); display: flex; flex-direction: column; position: relative; }
.news-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: rgba(13, 71, 161, 0.15); }
.news-card-img { position: relative; height: 200px; overflow: hidden; }
.news-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s cubic-bezier(0.25, 0.8, 0.25, 1); }
.news-card:hover .news-card-img img { transform: scale(1.06); }
.news-card-img::after { content: ''; position: absolute; inset: 0; background: linear-gradient(to top, rgba(8, 30, 60, 0.28), transparent 40%); }
.news-tag { position: absolute; top: 14px; left: 14px; z-index: 2; background: rgba(255, 255, 255, 0.94); color: var(--primary); font-size: 12px; font-weight: 700; padding: 5px 14px; border-radius: 30px; letter-spacing: 0.4px; backdrop-filter: blur(4px); box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08); }
.news-tag.accent { color: var(--accent-dark); }
.news-card-body { padding: 22px 24px 24px; display: flex; flex-direction: column; flex: 1; }
.news-card-title { font-size: 17px; font-weight: 700; line-height: 1.5; color: var(--text); margin-bottom: 10px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-card-title a:hover { color: var(--primary); }
.news-card-excerpt { font-size: 14px; color: var(--text-light); line-height: 1.7; margin-bottom: 18px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-meta { margin-top: auto; display: flex; align-items: center; gap: 16px; font-size: 13px; color: var(--text-lighter); padding-top: 16px; border-top: 1px solid var(--border); }
.news-meta-item { display: flex; align-items: center; gap: 5px; }
.news-meta-item i { font-size: 12px; }
.news-meta-item:last-child { margin-left: auto; }
/* ===== Stats Band ===== */
.stats-section { background: linear-gradient(135deg, #0a1c3d, #0d2b5c); padding: 76px 0; position: relative; overflow: hidden; }
.stats-section::before { content: ''; position: absolute; top: 0; right: 0; width: 400px; height: 400px; background: radial-gradient(circle, rgba(255, 143, 0, 0.15), transparent 60%); }
.stats-section::after { content: ''; position: absolute; bottom: -100px; left: -60px; width: 300px; height: 300px; background: radial-gradient(circle, rgba(21, 101, 192, 0.4), transparent 60%); }
.stats-section .section-head { margin-bottom: 56px; }
.stats-section .section-tag { background: rgba(255, 255, 255, 0.1); color: rgba(255, 255, 255, 0.9); }
.stats-section .section-title { color: #fff; }
.stats-section .section-subtitle { color: rgba(255, 255, 255, 0.65); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; position: relative; z-index: 2; }
.stat-item { background: rgba(255, 255, 255, 0.06); border: 1px solid rgba(255, 255, 255, 0.12); border-radius: var(--radius); padding: 36px 28px; text-align: center; backdrop-filter: blur(6px); transition: var(--transition); }
.stat-item:hover { background: rgba(255, 255, 255, 0.1); transform: translateY(-4px); border-color: rgba(255, 255, 255, 0.2); }
.stat-icon { width: 56px; height: 56px; margin: 0 auto 18px; background: rgba(255, 143, 0, 0.15); border-radius: 16px; display: flex; align-items: center; justify-content: center; font-size: 24px; color: var(--accent-light); }
.stat-number { font-size: 40px; font-weight: 800; color: #fff; line-height: 1.2; letter-spacing: -0.5px; }
.stat-number small { font-size: 18px; font-weight: 600; color: rgba(255, 255, 255, 0.6); margin-left: 2px; }
.stat-label { font-size: 14px; color: rgba(255, 255, 255, 0.65); margin-top: 8px; letter-spacing: 0.3px; }
/* ===== Rank Section ===== */
.rank-section { background: var(--white); padding: 88px 0; }
.rank-section .section-head { margin-bottom: 48px; }
.rank-list { max-width: 840px; margin: 0 auto; }
.rank-item { display: grid; grid-template-columns: 48px 1fr 100px; align-items: center; gap: 20px; padding: 18px 20px; border-radius: var(--radius-sm); transition: var(--transition); position: relative; }
.rank-item:hover { background: rgba(13, 71, 161, 0.04); }
.rank-num { width: 40px; height: 40px; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: 15px; background: rgba(13, 71, 161, 0.08); color: var(--primary); }
.rank-item:nth-child(1) .rank-num { background: linear-gradient(135deg, var(--accent), #ff9500); color: #fff; box-shadow: 0 4px 12px rgba(255, 143, 0, 0.3); }
.rank-item:nth-child(2) .rank-num { background: linear-gradient(135deg, #64748b, #94a3b8); color: #fff; }
.rank-item:nth-child(3) .rank-num { background: linear-gradient(135deg, #b45309, #d97706); color: #fff; }
.rank-info { min-width: 0; }
.rank-title { display: flex; align-items: center; gap: 8px; font-weight: 600; font-size: 15px; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.rank-title i { color: var(--accent); font-size: 13px; flex-shrink: 0; }
.rank-bar-wrap { margin-top: 8px; height: 5px; background: rgba(13, 71, 161, 0.06); border-radius: 4px; overflow: hidden; }
.rank-bar { height: 100%; border-radius: 4px; background: linear-gradient(90deg, var(--primary), var(--primary-light)); transition: width 0.8s cubic-bezier(0.25, 0.8, 0.25, 1); }
.rank-count { font-size: 14px; font-weight: 700; color: var(--primary); text-align: right; white-space: nowrap; }
.rank-count small { font-size: 12px; color: var(--text-lighter); font-weight: 400; margin-left: 2px; }
/* ===== Topic Section ===== */
.topic-section { padding: 88px 0; }
.topic-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.topic-card { position: relative; border-radius: var(--radius-lg); overflow: hidden; min-height: 320px; display: flex; align-items: flex-end; box-shadow: var(--shadow); transition: var(--transition); }
.topic-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.topic-card-img { position: absolute; inset: 0; }
.topic-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.7s cubic-bezier(0.25, 0.8, 0.25, 1); }
.topic-card:hover .topic-card-img img { transform: scale(1.06); }
.topic-card-img::after { content: ''; position: absolute; inset: 0; background: linear-gradient(to top, rgba(8, 20, 40, 0.82), rgba(8, 20, 40, 0.2) 55%, rgba(8, 20, 40, 0.05)); }
.topic-overlay { position: relative; z-index: 2; padding: 36px 32px; color: #fff; }
.topic-tag { display: inline-block; background: rgba(255, 143, 0, 0.9); color: #fff; font-size: 12px; font-weight: 700; padding: 5px 14px; border-radius: 30px; margin-bottom: 12px; letter-spacing: 0.4px; }
.topic-title { font-size: 24px; font-weight: 800; line-height: 1.4; margin-bottom: 8px; }
.topic-desc { font-size: 14px; color: rgba(255, 255, 255, 0.75); line-height: 1.7; max-width: 320px; }
.topic-more { display: inline-flex; align-items: center; gap: 6px; margin-top: 16px; font-size: 14px; font-weight: 500; color: var(--accent-light); }
.topic-more:hover { color: #fff; }
.topic-more i { font-size: 12px; transition: transform 0.3s; }
.topic-more:hover i { transform: translateX(4px); }
/* ===== FAQ Section ===== */
.faq-section { background: var(--white); padding: 88px 0; }
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 16px; }
.faq-item { background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius-sm); overflow: hidden; transition: var(--transition); }
.faq-item:hover { border-color: rgba(13, 71, 161, 0.2); }
.faq-item.active { box-shadow: var(--shadow); border-color: rgba(13, 71, 161, 0.25); }
.faq-question { display: flex; align-items: center; justify-content: space-between; gap: 16px; width: 100%; padding: 22px 24px; font-size: 16px; font-weight: 600; color: var(--text); text-align: left; transition: var(--transition); }
.faq-question i { color: var(--primary); font-size: 14px; transition: transform 0.35s; flex-shrink: 0; width: 24px; height: 24px; background: rgba(13, 71, 161, 0.08); border-radius: 50%; display: flex; align-items: center; justify-content: center; }
.faq-item.active .faq-question i { transform: rotate(45deg); background: var(--primary); color: #fff; }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s cubic-bezier(0.25, 0.8, 0.25, 1); }
.faq-item.active .faq-answer { max-height: 300px; }
.faq-answer p { padding: 0 24px 24px; font-size: 15px; color: var(--text-light); line-height: 1.8; }
/* ===== CTA Section ===== */
.cta-section { padding: 80px 0; }
.cta-box { position: relative; background: linear-gradient(135deg, rgba(8, 46, 107, 0.95), rgba(13, 71, 161, 0.88)), url('/assets/images/backpic/back-2.png') center/cover no-repeat; border-radius: var(--radius-lg); padding: 64px 48px; text-align: center; color: #fff; overflow: hidden; box-shadow: var(--shadow-lg); }
.cta-box::before { content: ''; position: absolute; top: -60px; left: 10%; width: 240px; height: 240px; background: rgba(255, 143, 0, 0.18); border-radius: 50%; filter: blur(50px); }
.cta-box::after { content: ''; position: absolute; bottom: -40px; right: 5%; width: 200px; height: 200px; background: rgba(255, 255, 255, 0.08); border-radius: 50%; filter: blur(40px); }
.cta-box > * { position: relative; z-index: 2; }
.cta-icon { width: 64px; height: 64px; margin: 0 auto 20px; background: rgba(255, 143, 0, 0.2); border: 1px solid rgba(255, 255, 255, 0.2); border-radius: 18px; display: flex; align-items: center; justify-content: center; font-size: 26px; color: var(--accent-light); }
.cta-title { font-size: 32px; font-weight: 800; letter-spacing: -0.3px; margin-bottom: 12px; }
.cta-desc { font-size: 16px; color: rgba(255, 255, 255, 0.78); max-width: 560px; margin: 0 auto 32px; line-height: 1.8; }
.cta-buttons { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; }
/* ===== Footer ===== */
.site-footer { background: #0a1428; color: rgba(255, 255, 255, 0.7); padding: 64px 0 24px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 40px; margin-bottom: 48px; }
.footer-brand { max-width: 360px; }
.footer-logo { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.footer-logo .logo-icon { background: linear-gradient(135deg, var(--accent), var(--accent-dark)); color: #fff; }
.footer-logo .logo-text { color: #fff; font-weight: 700; }
.footer-brand p { font-size: 14px; line-height: 1.7; color: rgba(255, 255, 255, 0.55); }
.footer-col h4 { color: #fff; font-size: 15px; font-weight: 700; margin-bottom: 20px; letter-spacing: 0.4px; }
.footer-col a { display: block; padding: 6px 0; font-size: 14px; color: rgba(255, 255, 255, 0.55); transition: var(--transition); }
.footer-col a:hover { color: var(--accent-light); padding-left: 6px; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, 0.1); padding-top: 24px; text-align: center; font-size: 13px; color: rgba(255, 255, 255, 0.4); }
.footer-bottom a { color: rgba(255, 255, 255, 0.5); }
.footer-bottom a:hover { color: var(--accent-light); }
/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .news-grid { grid-template-columns: repeat(2, 1fr); }
    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
    .hero-title { font-size: 36px; }
    .section { padding: 70px 0; }
}
@media (max-width: 768px) {
    .site-header { background: rgba(255, 255, 255, 0.98); }
    .nav-toggle { display: flex; }
    .nav-menu { position: absolute; top: 76px; left: 0; right: 0; background: #fff; flex-direction: column; align-items: flex-start; padding: 16px 24px 20px; gap: 6px; border-bottom: 1px solid var(--border); box-shadow: 0 12px 32px rgba(13, 71, 161, 0.1); transform: translateY(-12px); opacity: 0; visibility: hidden; transition: var(--transition); }
    .nav-menu.open { transform: translateY(0); opacity: 1; visibility: visible; }
    .nav-link { width: 100%; padding: 12px 16px; border-radius: 10px; font-size: 16px; }
    .page-hero { padding: 72px 0 64px; }
    .hero-title { font-size: 30px; }
    .hero-desc { font-size: 16px; }
    .hero-stats { gap: 24px; }
    .hero-stat-num { font-size: 24px; }
    .section-title { font-size: 28px; }
    .news-grid { grid-template-columns: 1fr; gap: 20px; }
    .topic-grid { grid-template-columns: 1fr; }
    .topic-card { min-height: 260px; }
    .cta-box { padding: 48px 24px; }
    .cta-title { font-size: 26px; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .footer-brand { max-width: 100%; }
    .stats-grid { grid-template-columns: 1fr; }
    .rank-item { grid-template-columns: 40px 1fr 80px; gap: 12px; }
    .section { padding: 56px 0; }
}
@media (max-width: 520px) {
    .container { padding: 0 18px; }
    .logo-text { font-size: 16px; }
    .hero-title { font-size: 26px; }
    .hero-badge { font-size: 12px; }
    .hero-desc { font-size: 15px; }
    .filter-btn { padding: 8px 16px; font-size: 13px; }
    .news-card-title { font-size: 16px; }
    .stat-number { font-size: 32px; }
    .rank-item { grid-template-columns: 36px 1fr 70px; padding: 14px 12px; }
    .rank-title { font-size: 14px; }
    .faq-question { padding: 18px 16px; font-size: 15px; }
    .cta-box { padding: 40px 20px; }
    .cta-title { font-size: 22px; }
    .btn { padding: 11px 22px; font-size: 14px; }
}

/* roulang page: category3 */
:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #dbeafe;
            --accent: #f59e0b;
            --accent-light: #fef3c7;
            --bg: #f8fafc;
            --bg-deep: #0f172a;
            --text: #1e293b;
            --text-light: #64748b;
            --border: #e2e8f0;
            --white: #ffffff;
            --radius: 16px;
            --radius-sm: 12px;
            --shadow: 0 4px 24px rgba(15, 23, 42, 0.08);
            --shadow-lg: 0 12px 40px rgba(15, 23, 42, 0.14);
            --transition: all 0.3s ease;
            --container: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }

        ul,
        ol {
            list-style: none;
        }

        button,
        input,
        select,
        textarea {
            font: inherit;
            border: none;
            outline: none;
            background: none;
        }

        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header ===== */
        .site-header {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            position: sticky;
            top: 0;
            z-index: 100;
            border-bottom: 1px solid var(--border);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 76px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-weight: 700;
            color: var(--text);
        }

        .logo-icon {
            width: 42px;
            height: 42px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 22px;
            font-weight: 800;
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
        }

        .logo-text {
            font-size: 20px;
            letter-spacing: 0.5px;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-link {
            padding: 10px 18px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-light);
            transition: var(--transition);
        }

        .nav-link:hover {
            color: var(--primary);
            background: var(--primary-light);
        }

        .nav-link.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 600;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            cursor: pointer;
        }

        .nav-toggle span {
            width: 24px;
            height: 2px;
            background: var(--text);
            border-radius: 4px;
            transition: var(--transition);
        }

        /* ===== Banner ===== */
        .page-banner {
            background: linear-gradient(rgba(15, 23, 42, 0.82), rgba(15, 23, 42, 0.82)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            padding: 120px 0 80px;
            color: #fff;
            text-align: center;
        }

        .page-banner h1 {
            font-size: 44px;
            font-weight: 800;
            margin-bottom: 16px;
            line-height: 1.2;
        }

        .page-banner p {
            font-size: 18px;
            max-width: 640px;
            margin: 0 auto;
            color: rgba(255, 255, 255, 0.85);
        }

        .banner-breadcrumb {
            margin-top: 24px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
        }

        .banner-breadcrumb a {
            color: var(--accent);
        }

        .banner-breadcrumb span {
            margin: 0 8px;
        }

        /* ===== Section Base ===== */
        .section {
            padding: 80px 0;
        }

        .section-head {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 48px;
        }

        .section-tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 14px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 30px;
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }

        .section-head h2 {
            font-size: 32px;
            font-weight: 800;
            color: var(--text);
            line-height: 1.3;
        }

        .section-head p {
            margin-top: 12px;
            color: var(--text-light);
            font-size: 16px;
        }

        /* ===== Support Cards ===== */
        .support-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .support-card {
            background: var(--white);
            border-radius: var(--radius);
            padding: 28px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: var(--transition);
            text-align: center;
        }

        .support-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary);
        }

        .support-icon {
            width: 64px;
            height: 64px;
            background: linear-gradient(135deg, var(--primary-light), #eff6ff);
            border-radius: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            color: var(--primary);
            margin: 0 auto 18px;
        }

        .support-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .support-card p {
            font-size: 14px;
            color: var(--text-light);
        }

        .support-card .card-link {
            display: inline-block;
            margin-top: 14px;
            color: var(--primary);
            font-weight: 600;
            font-size: 14px;
        }

        .support-card .card-link:hover {
            text-decoration: underline;
        }

        /* ===== Service Flow ===== */
        .flow-section {
            background: var(--bg-deep);
            color: #fff;
        }

        .flow-section .section-tag {
            background: rgba(255, 255, 255, 0.12);
            color: var(--accent);
        }

        .flow-section .section-head h2 {
            color: #fff;
        }

        .flow-section .section-head p {
            color: rgba(255, 255, 255, 0.7);
        }

        .flow-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 48px;
        }

        .flow-step {
            background: rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius);
            padding: 28px;
            position: relative;
            transition: var(--transition);
        }

        .flow-step:hover {
            background: rgba(255, 255, 255, 0.14);
            transform: translateY(-4px);
        }

        .flow-step .step-num {
            font-size: 42px;
            font-weight: 800;
            color: var(--accent);
            opacity: 0.8;
            line-height: 1;
        }

        .flow-step h3 {
            font-size: 18px;
            font-weight: 700;
            margin: 12px 0 8px;
        }

        .flow-step p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.8);
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 860px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            margin-bottom: 16px;
            overflow: hidden;
            transition: var(--transition);
        }

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

        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 18px 24px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
        }

        .faq-question i {
            color: var(--primary);
            transition: var(--transition);
        }

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

        .faq-answer {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            color: var(--text-light);
            font-size: 15px;
            transition: max-height 0.3s ease, padding 0.3s ease;
        }

        .faq-item.active .faq-answer {
            padding: 0 24px 20px;
            max-height: 300px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            padding: 70px 0;
            text-align: center;
            color: #fff;
        }

        .cta-section h2 {
            font-size: 32px;
            font-weight: 800;
            margin-bottom: 14px;
        }

        .cta-section p {
            font-size: 16px;
            opacity: 0.9;
            margin-bottom: 28px;
        }

        .btn-group {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-block;
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 16px;
            cursor: pointer;
            transition: var(--transition);
        }

        .btn-white {
            background: #fff;
            color: var(--primary);
        }

        .btn-white:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
        }

        .btn-outline {
            border: 2px solid rgba(255, 255, 255, 0.8);
            color: #fff;
        }

        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.15);
            transform: translateY(-2px);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-deep);
            color: #94a3b8;
            padding: 60px 0 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-logo .logo-icon {
            background: var(--primary);
            box-shadow: none;
        }

        .footer-logo .logo-text {
            font-size: 18px;
            font-weight: 700;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            max-width: 340px;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .footer-col a {
            display: block;
            font-size: 14px;
            color: #94a3b8;
            padding: 6px 0;
        }

        .footer-col a:hover {
            color: var(--accent);
        }

        .footer-bottom {
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
            flex-wrap: wrap;
            gap: 12px;
        }

        .footer-bottom a {
            color: var(--accent);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .support-grid,
            .flow-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .page-banner h1 {
                font-size: 36px;
            }
        }

        @media (max-width: 768px) {
            .nav-toggle {
                display: flex;
            }

            .nav-menu {
                position: fixed;
                top: 76px;
                left: 0;
                right: 0;
                background: var(--white);
                flex-direction: column;
                align-items: flex-start;
                padding: 16px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow);
                transform: translateY(-120%);
                opacity: 0;
                transition: transform 0.3s ease, opacity 0.3s ease;
            }

            .nav-menu.open {
                transform: translateY(0);
                opacity: 1;
            }

            .nav-link {
                display: block;
                width: 100%;
                padding: 12px 16px;
            }

            .page-banner {
                padding: 80px 0 60px;
            }

            .page-banner h1 {
                font-size: 30px;
            }

            .section {
                padding: 60px 0;
            }

            .section-head h2 {
                font-size: 26px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 520px) {
            .support-grid,
            .flow-grid {
                grid-template-columns: 1fr;
            }

            .container {
                padding: 0 16px;
            }

            .header-inner {
                height: 64px;
            }

            .logo-text {
                font-size: 16px;
            }

            .page-banner h1 {
                font-size: 26px;
            }

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

/* roulang page: category2 */
:root {
            --primary: #0b1f3a;
            --primary-light: #162e52;
            --primary-soft: #eef2f8;
            --accent: #f97316;
            --accent-hover: #ea6a0c;
            --accent-soft: #fff2e8;
            --gold: #fbbf24;
            --bg: #f6f8fc;
            --white: #ffffff;
            --text: #16233a;
            --text-weak: #5c6b82;
            --border: #e3e9f2;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow: 0 12px 32px rgba(11, 31, 58, 0.08);
            --shadow-lg: 0 20px 48px rgba(11, 31, 58, 0.14);
            --spacer: 24px;
            --transition: all 0.3s ease;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            border: none;
            outline: none;
        }

        ul,
        ol {
            list-style: none;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 4px 20px rgba(11, 31, 58, 0.04);
            height: 70px;
            display: flex;
            align-items: center;
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: var(--white);
            font-weight: 800;
            font-size: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 12px rgba(249, 115, 22, 0.3);
        }

        .logo-text {
            font-size: 18px;
            font-weight: 700;
            letter-spacing: 0.5px;
            color: var(--primary);
            white-space: nowrap;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-link {
            padding: 10px 18px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
            background: transparent;
            transition: var(--transition);
            position: relative;
        }

        .nav-link:hover {
            background: var(--primary-soft);
            color: var(--primary);
        }

        .nav-link.active {
            background: var(--primary);
            color: var(--white);
            box-shadow: 0 6px 16px rgba(11, 31, 58, 0.2);
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%);
            width: 16px;
            height: 2px;
            border-radius: 2px;
            background: var(--accent);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            padding: 8px;
            cursor: pointer;
            border-radius: 8px;
        }

        .nav-toggle span {
            width: 22px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: var(--transition);
        }

        /* ===== Banner ===== */
        .page-banner {
            position: relative;
            padding: 110px 0 110px;
            background: linear-gradient(135deg, rgba(11, 31, 58, 0.94), rgba(22, 46, 82, 0.82)), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            color: var(--white);
            overflow: hidden;
        }

        .page-banner::after {
            content: '';
            position: absolute;
            right: -120px;
            top: 40px;
            width: 420px;
            height: 420px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(249, 115, 22, 0.3), transparent 70%);
            pointer-events: none;
        }

        .banner-inner {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 60px;
            align-items: center;
        }

        .banner-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 18px;
        }

        .banner-breadcrumb a:hover {
            color: var(--accent);
        }

        .banner-breadcrumb .sep {
            color: rgba(255, 255, 255, 0.4);
        }

        .page-banner h1 {
            font-size: 48px;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 18px;
            letter-spacing: 1px;
        }

        .page-banner h1 span {
            color: var(--accent);
        }

        .banner-desc {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 520px;
            margin-bottom: 32px;
            line-height: 1.8;
        }

        .banner-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .banner-tags .tag {
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.18);
            color: var(--white);
            padding: 6px 16px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
        }

        .banner-stats {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            position: relative;
            z-index: 2;
        }

        .banner-stat {
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--radius);
            padding: 24px 20px;
            backdrop-filter: blur(8px);
            text-align: center;
            transition: var(--transition);
        }

        .banner-stat:hover {
            background: rgba(255, 255, 255, 0.14);
            transform: translateY(-4px);
        }

        .banner-stat .num {
            font-size: 36px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.1;
        }

        .banner-stat .label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.75);
            margin-top: 6px;
        }

        /* ===== Section Base ===== */
        .section {
            padding: 90px 0;
        }

        .section-alt {
            background: var(--white);
        }

        .section-head {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 56px;
        }

        .section-head .eyebrow {
            display: inline-block;
            background: var(--accent-soft);
            color: var(--accent);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 999px;
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }

        .section-head h2 {
            font-size: 36px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.25;
            margin-bottom: 16px;
        }

        .section-head p {
            color: var(--text-weak);
            font-size: 16px;
        }

        /* ===== Feature Category Cards ===== */
        .cat-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .cat-card {
            background: var(--white);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

        .cat-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(249, 115, 22, 0.4);
        }

        .cat-card .cat-img {
            height: 160px;
            overflow: hidden;
            position: relative;
        }

        .cat-card .cat-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .cat-card:hover .cat-img img {
            transform: scale(1.06);
        }

        .cat-card .cat-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent, rgba(11, 31, 58, 0.45));
        }

        .cat-card .cat-icon {
            position: absolute;
            left: 16px;
            bottom: -18px;
            z-index: 2;
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: var(--accent);
            color: var(--white);
            font-size: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 6px 16px rgba(249, 115, 22, 0.4);
        }

        .cat-card .cat-body {
            padding: 32px 20px 20px;
        }

        .cat-card .cat-body h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }

        .cat-card .cat-body p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.65;
        }

        .cat-card .cat-more {
            margin-top: auto;
            padding: 16px 20px;
            border-top: 1px solid var(--border);
            font-size: 14px;
            font-weight: 600;
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: var(--primary-soft);
            transition: var(--transition);
        }

        .cat-card:hover .cat-more {
            background: var(--accent);
            color: var(--white);
        }

        /* ===== Core Feature Cards ===== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .feature-card {
            background: var(--white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            padding: 32px 28px;
            box-shadow: var(--shadow);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--accent), var(--gold));
            opacity: 0;
            transition: var(--transition);
        }

        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }

        .feature-card:hover::before {
            opacity: 1;
        }

        .feature-card .f-icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            background: var(--accent-soft);
            color: var(--accent);
            font-size: 22px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            transition: var(--transition);
        }

        .feature-card:hover .f-icon {
            background: var(--accent);
            color: var(--white);
            transform: scale(1.06);
        }

        .feature-card h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 12px;
        }

        .feature-card p {
            font-size: 14.5px;
            color: var(--text-weak);
            line-height: 1.7;
            margin-bottom: 18px;
        }

        .feature-card .f-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            color: var(--text-weak);
            border-top: 1px solid var(--border);
            padding-top: 16px;
        }

        .feature-card .f-meta .tag {
            background: var(--primary-soft);
            color: var(--primary);
            padding: 4px 12px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 12px;
        }

        .feature-card .f-meta .stat {
            color: var(--accent);
            font-weight: 600;
            margin-left: auto;
        }

        /* ===== Flow Process ===== */
        .flow-section {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: var(--white);
        }

        .flow-section .section-head h2 {
            color: var(--white);
        }

        .flow-section .section-head p {
            color: rgba(255, 255, 255, 0.7);
        }

        .flow-section .section-head .eyebrow {
            background: rgba(255, 255, 255, 0.12);
            color: var(--gold);
        }

        .flow-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            position: relative;
        }

        .flow-steps::before {
            content: '';
            position: absolute;
            top: 44px;
            left: 12%;
            right: 12%;
            height: 2px;
            background: rgba(255, 255, 255, 0.15);
        }

        .flow-step {
            text-align: center;
            position: relative;
        }

        .flow-step .step-num {
            width: 88px;
            height: 88px;
            margin: 0 auto 20px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            border: 2px solid rgba(255, 255, 255, 0.2);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            position: relative;
            z-index: 1;
            backdrop-filter: blur(4px);
            transition: var(--transition);
        }

        .flow-step:hover .step-num {
            border-color: var(--accent);
            background: rgba(249, 115, 22, 0.2);
            transform: scale(1.06);
        }

        .flow-step .step-num .no {
            font-size: 24px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1;
        }

        .flow-step .step-num .sub {
            font-size: 11px;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 4px;
        }

        .flow-step h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .flow-step p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            line-height: 1.65;
        }

        /* ===== Stats Bar ===== */
        .stats-band {
            background: var(--white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
            padding: 48px 40px;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            margin-top: -50px;
            position: relative;
            z-index: 3;
        }

        .stats-band .stat-item {
            text-align: center;
            padding: 12px 8px;
            border-radius: var(--radius);
            transition: var(--transition);
        }

        .stats-band .stat-item:hover {
            background: var(--primary-soft);
            transform: translateY(-4px);
        }

        .stats-band .stat-item .num {
            font-size: 40px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.1;
            letter-spacing: -1px;
        }

        .stats-band .stat-item .num small {
            font-size: 20px;
            color: var(--accent);
        }

        .stats-band .stat-item .label {
            font-size: 14px;
            color: var(--text-weak);
            margin-top: 8px;
        }

        /* ===== Hot Ranking ===== */
        .hot-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .hot-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            position: relative;
        }

        .hot-image img {
            width: 100%;
            height: 460px;
            object-fit: cover;
        }

        .hot-image::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 55%, rgba(11, 31, 58, 0.75));
        }

        .hot-image .hot-tag {
            position: absolute;
            left: 20px;
            bottom: 20px;
            z-index: 2;
            background: var(--accent);
            color: var(--white);
            padding: 8px 18px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 600;
            box-shadow: 0 6px 16px rgba(249, 115, 22, 0.4);
        }

        .hot-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .hot-item {
            display: flex;
            align-items: center;
            gap: 18px;
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 20px 24px;
            transition: var(--transition);
        }

        .hot-item:hover {
            box-shadow: var(--shadow);
            transform: translateX(4px);
            border-color: rgba(249, 115, 22, 0.35);
        }

        .hot-item .rank {
            font-size: 28px;
            font-weight: 800;
            color: var(--border);
            line-height: 1;
            min-width: 44px;
            transition: var(--transition);
        }

        .hot-item:hover .rank {
            color: var(--accent);
        }

        .hot-item .info {
            flex: 1;
        }

        .hot-item .info h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 4px;
        }

        .hot-item .info p {
            font-size: 13px;
            color: var(--text-weak);
            line-height: 1.5;
        }

        .hot-item .heat {
            font-size: 13px;
            font-weight: 700;
            color: var(--accent);
            background: var(--accent-soft);
            padding: 4px 14px;
            border-radius: 999px;
            white-space: nowrap;
        }

        /* ===== FAQ ===== */
        .faq-wrap {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item summary {
            padding: 22px 28px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--primary);
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            user-select: none;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary::after {
            content: '\f078';
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            font-size: 14px;
            color: var(--accent);
            transition: var(--transition);
            flex-shrink: 0;
        }

        .faq-item[open] summary::after {
            transform: rotate(180deg);
        }

        .faq-item .faq-a {
            padding: 0 28px 22px;
            color: var(--text-weak);
            font-size: 15px;
            line-height: 1.75;
        }

        .faq-item:hover {
            border-color: rgba(249, 115, 22, 0.35);
        }

        /* ===== CTA ===== */
        .cta-section {
            position: relative;
            padding: 80px 0;
            background: linear-gradient(135deg, var(--primary), var(--primary-light)), url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            background-blend-mode: multiply;
            color: var(--white);
            text-align: center;
        }

        .cta-section h2 {
            font-size: 34px;
            font-weight: 800;
            margin-bottom: 14px;
        }

        .cta-section p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 16px;
            max-width: 560px;
            margin: 0 auto 32px;
        }

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

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 600;
            border: 2px solid transparent;
            cursor: pointer;
            transition: var(--transition);
            text-align: center;
        }

        .btn-accent {
            background: var(--accent);
            color: var(--white);
            box-shadow: 0 8px 24px rgba(249, 115, 22, 0.35);
        }

        .btn-accent:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(249, 115, 22, 0.4);
        }

        .btn-outline-light {
            border-color: rgba(255, 255, 255, 0.35);
            color: var(--white);
            background: transparent;
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: var(--white);
        }

        .btn:focus-visible {
            outline: 3px solid rgba(249, 115, 22, 0.4);
            outline-offset: 2px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary);
            color: rgba(255, 255, 255, 0.7);
            padding-top: 70px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr;
            gap: 50px;
            padding-bottom: 50px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }

        .footer-logo .logo-icon {
            background: linear-gradient(135deg, var(--accent), var(--gold));
        }

        .footer-logo .logo-text {
            color: var(--white);
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            max-width: 380px;
            color: rgba(255, 255, 255, 0.6);
        }

        .footer-col h4 {
            color: var(--white);
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 20px;
        }

        .footer-col a {
            display: block;
            padding: 6px 0;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition);
        }

        .footer-col a:hover {
            color: var(--accent);
            padding-left: 6px;
        }

        .footer-bottom {
            padding: 28px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.7);
        }

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

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .cat-grid {
                grid-template-columns: repeat(2, 1fr);
            }

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

            .flow-steps {
                grid-template-columns: repeat(2, 1fr);
                gap: 40px;
            }

            .flow-steps::before {
                display: none;
            }

            .stats-band {
                grid-template-columns: repeat(2, 1fr);
                margin-top: -30px;
            }

            .banner-inner {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .page-banner {
                padding: 80px 0;
            }

            .page-banner h1 {
                font-size: 38px;
            }

            .hot-wrap {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .hot-image img {
                height: 320px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 40px;
            }
        }

        @media (max-width: 768px) {
            .site-header {
                height: 62px;
            }

            .nav-menu {
                position: absolute;
                top: 62px;
                left: 0;
                right: 0;
                background: var(--white);
                flex-direction: column;
                align-items: stretch;
                padding: 16px 24px 24px;
                gap: 8px;
                box-shadow: 0 20px 40px rgba(11, 31, 58, 0.1);
                border-bottom: 1px solid var(--border);
                display: none;
            }

            .nav-menu.open {
                display: flex;
            }

            .nav-link {
                padding: 14px 18px;
                border-radius: 12px;
                text-align: center;
            }

            .nav-link.active::after {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .page-banner {
                padding: 60px 0;
            }

            .page-banner h1 {
                font-size: 32px;
            }

            .banner-desc {
                font-size: 15px;
            }

            .cat-grid {
                grid-template-columns: 1fr;
            }

            .feature-grid {
                grid-template-columns: 1fr;
            }

            .flow-steps {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .stats-band {
                grid-template-columns: 1fr 1fr;
                padding: 30px 20px;
                gap: 20px;
            }

            .section {
                padding: 60px 0;
            }

            .section-head h2 {
                font-size: 28px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }

            .footer-bottom {
                justify-content: center;
                text-align: center;
            }

            .hot-item {
                flex-direction: column;
                text-align: center;
                align-items: center;
            }

            .hot-item .rank {
                font-size: 22px;
            }

            .hot-item .heat {
                align-self: center;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 18px;
            }

            .logo-text {
                font-size: 16px;
            }

            .logo-icon {
                width: 34px;
                height: 34px;
                font-size: 16px;
            }

            .page-banner h1 {
                font-size: 27px;
            }

            .banner-stats {
                grid-template-columns: 1fr;
            }

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

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

            .feature-card {
                padding: 24px 20px;
            }

            .flow-step .step-num {
                width: 72px;
                height: 72px;
            }

            .cta-section {
                padding: 60px 0;
            }

            .cta-section h2 {
                font-size: 26px;
            }
        }