/* roulang page: index */
:root {
        --primary: #4361ee;
        --primary-dark: #2d4acf;
        --primary-rgb: 67, 97, 238;
        --primary-light: #eef2ff;
        --accent: #06b6d4;
        --accent-rgb: 6, 182, 212;
        --accent-dark: #0e9bb5;
        --warn: #f59e0b;
        --danger: #ef4444;
        --success: #10b981;
        --body-bg: #f8f9fe;
        --text: #0f172a;
        --text-body: #3b4a5f;
        --text-weak: #8896ab;
        --border: #e2e8f0;
        --border-light: #eef1f6;
        --dark-bg: #101b32;
        --dark-card: #1c2942;
        --white: #ffffff;
        --radius-xl: 22px;
        --radius: 14px;
        --radius-sm: 10px;
        --radius-xs: 6px;
        --shadow: 0 6px 24px rgba(15, 23, 42, 0.07);
        --shadow-md: 0 12px 36px rgba(15, 23, 42, 0.09);
        --shadow-lg: 0 24px 60px rgba(15, 23, 42, 0.12);
        --shadow-blue: 0 10px 32px rgba(var(--primary-rgb), 0.18);
        --transition: all 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    }

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

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

    body {
        margin: 0;
        font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
        font-size: 16px;
        line-height: 1.7;
        color: var(--text-body);
        background: var(--body-bg);
        -webkit-font-smoothing: antialiased;
        overflow-x: hidden;
    }

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

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

    a:hover {
        color: var(--primary-dark);
    }

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

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

    .section-padding {
        padding: 90px 0;
    }

    .section-header {
        text-align: center;
        max-width: 720px;
        margin: 0 auto 56px;
    }

    .section-header .section-tag {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        background: var(--primary-light);
        color: var(--primary);
        font-size: 14px;
        font-weight: 600;
        padding: 6px 18px;
        border-radius: 100px;
        letter-spacing: 1px;
        margin-bottom: 16px;
        text-transform: uppercase;
    }

    .section-header h2 {
        font-size: clamp(30px, 4vw, 42px);
        color: var(--text);
        font-weight: 800;
        line-height: 1.25;
        margin: 0 0 14px;
        letter-spacing: -0.5px;
    }

    .section-header p {
        font-size: 17px;
        color: var(--text-weak);
        margin: 0;
    }

    /* ========== Buttons ========== */
    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        padding: 12px 28px;
        border-radius: 100px;
        font-weight: 600;
        font-size: 15px;
        line-height: 1.5;
        cursor: pointer;
        border: 2px solid transparent;
        transition: var(--transition);
        text-align: center;
        white-space: nowrap;
    }

    .btn i {
        font-size: 14px;
    }

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

    .btn-primary:hover {
        background: var(--primary-dark);
        color: #fff;
        transform: translateY(-3px);
        box-shadow: 0 16px 44px rgba(var(--primary-rgb), 0.3);
    }

    .btn-outline {
        background: transparent;
        color: var(--primary);
        border-color: rgba(var(--primary-rgb), 0.4);
    }

    .btn-outline:hover {
        background: var(--primary-light);
        border-color: var(--primary);
        color: var(--primary-dark);
        transform: translateY(-3px);
    }

    .btn-light {
        background: #fff;
        color: var(--text);
        box-shadow: 0 6px 22px rgba(0, 0, 0, 0.12);
    }

    .btn-light:hover {
        background: #f1f5f9;
        color: var(--primary);
        transform: translateY(-3px);
        box-shadow: 0 12px 32px rgba(0, 0, 0, 0.16);
    }

    .btn-accent {
        background: var(--accent);
        color: #fff;
        box-shadow: 0 8px 26px rgba(var(--accent-rgb), 0.25);
    }

    .btn-accent:hover {
        background: var(--accent-dark);
        color: #fff;
        transform: translateY(-3px);
    }

    .btn-lg {
        padding: 16px 40px;
        font-size: 17px;
    }

    .btn-block {
        width: 100%;
    }

    .btn:focus-visible {
        outline: 3px solid rgba(var(--primary-rgb), 0.35);
        outline-offset: 2px;
    }

    /* ========== Badge / Tag ========== */
    .badge {
        display: inline-flex;
        align-items: center;
        gap: 4px;
        padding: 4px 12px;
        border-radius: 100px;
        font-size: 13px;
        font-weight: 600;
        background: var(--primary-light);
        color: var(--primary);
    }

    .badge-accent {
        background: rgba(6, 182, 212, 0.12);
        color: var(--accent-dark);
    }

    .badge-warn {
        background: rgba(245, 158, 11, 0.14);
        color: #b45309;
    }

    .badge-success {
        background: rgba(16, 185, 129, 0.14);
        color: #047857;
    }

    .badge-danger {
        background: rgba(239, 68, 68, 0.12);
        color: #b91c1c;
    }

    /* ========== Header ========== */
    .site-header {
        background: var(--white);
        box-shadow: 0 2px 20px rgba(15, 23, 42, 0.06);
        position: sticky;
        top: 0;
        z-index: 1000;
        border-bottom: 1px solid var(--border-light);
    }

    .header-top {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 16px 0;
        gap: 20px;
    }

    .brand {
        display: flex;
        align-items: center;
        gap: 10px;
        text-decoration: none;
        min-width: 0;
    }

    .brand-logo {
        width: 44px;
        height: 44px;
        flex-shrink: 0;
        border-radius: 12px;
        background: linear-gradient(135deg, var(--primary), var(--accent));
        display: flex;
        align-items: center;
        justify-content: center;
        color: #fff;
        font-size: 20px;
        font-weight: 800;
        box-shadow: 0 6px 18px rgba(var(--primary-rgb), 0.28);
    }

    .brand-text {
        font-size: 21px;
        font-weight: 800;
        color: var(--text);
        line-height: 1.2;
        letter-spacing: -0.3px;
    }

    .brand-text span {
        color: var(--primary);
    }

    .brand-sub {
        font-size: 12px;
        color: var(--text-weak);
        font-weight: 500;
        letter-spacing: 0.5px;
        margin-top: 2px;
    }

    .header-actions {
        display: flex;
        align-items: center;
        gap: 14px;
        flex-shrink: 0;
    }

    .header-search {
        position: relative;
    }

    .header-search input {
        width: 220px;
        height: 42px;
        border: 1.5px solid var(--border);
        border-radius: 100px;
        padding: 0 44px 0 18px;
        font-size: 14px;
        background: var(--body-bg);
        transition: var(--transition);
        outline: none;
    }

    .header-search input:focus {
        border-color: var(--primary);
        background: #fff;
        box-shadow: 0 0 0 4px rgba(var(--primary-rgb), 0.12);
        width: 260px;
    }

    .header-search button {
        position: absolute;
        right: 4px;
        top: 50%;
        transform: translateY(-50%);
        width: 34px;
        height: 34px;
        border: none;
        background: var(--primary);
        color: #fff;
        border-radius: 50%;
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 13px;
        transition: var(--transition);
    }

    .header-search button:hover {
        background: var(--primary-dark);
    }

    .header-cta {
        padding: 10px 22px;
        font-size: 14px;
    }

    /* Channel Tabs */
    .channel-nav-wrap {
        background: var(--white);
        border-top: 1px solid var(--border-light);
    }

    .channel-nav {
        display: flex;
        align-items: center;
        gap: 8px;
        overflow-x: auto;
        padding: 10px 0;
        scrollbar-width: none;
        -ms-overflow-style: none;
    }

    .channel-nav::-webkit-scrollbar {
        display: none;
    }

    .channel-tab {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 8px 22px;
        border-radius: 100px;
        font-size: 15px;
        font-weight: 600;
        color: var(--text-body);
        background: transparent;
        transition: var(--transition);
        white-space: nowrap;
        border: 1.5px solid transparent;
    }

    .channel-tab i {
        font-size: 14px;
    }

    .channel-tab:hover {
        color: var(--primary);
        background: var(--primary-light);
        border-color: rgba(var(--primary-rgb), 0.15);
    }

    .channel-tab.active {
        color: #fff;
        background: var(--primary);
        box-shadow: var(--shadow-blue);
    }

    .channel-tab.active:hover {
        color: #fff;
        background: var(--primary-dark);
    }

    /* ========== Hero ========== */
    .hero {
        position: relative;
        background: linear-gradient(135deg, rgba(15, 23, 42, 0.92) 0%, rgba(var(--primary-rgb), 0.78) 50%, rgba(6, 182, 212, 0.72) 100%),
                    url('/assets/images/backpic/back-1.png');
        background-size: cover;
        background-position: center;
        padding: 120px 0 140px;
        color: #fff;
        overflow: hidden;
    }

    .hero::before {
        content: '';
        position: absolute;
        top: -80px;
        right: -80px;
        width: 320px;
        height: 320px;
        background: rgba(255, 255, 255, 0.08);
        border-radius: 50%;
        pointer-events: none;
    }

    .hero::after {
        content: '';
        position: absolute;
        bottom: -120px;
        left: 10%;
        width: 260px;
        height: 260px;
        background: rgba(var(--accent-rgb), 0.25);
        border-radius: 50%;
        filter: blur(80px);
        pointer-events: none;
    }

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

    .hero-badges {
        display: flex;
        justify-content: center;
        flex-wrap: wrap;
        gap: 10px;
        margin-bottom: 26px;
    }

    .hero-badges .badge {
        background: rgba(255, 255, 255, 0.16);
        color: #fff;
        border: 1px solid rgba(255, 255, 255, 0.25);
        backdrop-filter: blur(8px);
        padding: 7px 18px;
        font-size: 14px;
    }

    .hero h1 {
        font-size: clamp(38px, 6vw, 68px);
        font-weight: 900;
        letter-spacing: -1.5px;
        line-height: 1.15;
        margin: 0 0 18px;
    }

    .hero h1 span {
        background: linear-gradient(90deg, #7dd3fc, #a5f3fc, #99f6e4);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
        display: inline-block;
    }

    .hero-subtitle {
        font-size: clamp(16px, 2.4vw, 21px);
        color: rgba(255, 255, 255, 0.88);
        max-width: 680px;
        margin: 0 auto 34px;
        line-height: 1.65;
    }

    .hero-btns {
        display: flex;
        justify-content: center;
        gap: 16px;
        flex-wrap: wrap;
        margin-bottom: 36px;
    }

    .hero-stats {
        display: flex;
        justify-content: center;
        flex-wrap: wrap;
        gap: 34px;
        padding-top: 30px;
        border-top: 1px solid rgba(255, 255, 255, 0.18);
        max-width: 640px;
        margin: 0 auto;
    }

    .hero-stats .hs-item {
        text-align: center;
    }

    .hero-stats .hs-value {
        font-size: 30px;
        font-weight: 800;
        color: #fff;
        line-height: 1.2;
    }

    .hero-stats .hs-label {
        font-size: 13px;
        color: rgba(255, 255, 255, 0.72);
        margin-top: 4px;
    }

    /* ========== Features ========== */
    .features {
        position: relative;
        background: var(--white);
        padding: 90px 0;
        border-bottom: 1px solid var(--border-light);
    }

    .features-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 26px;
    }

    .feature-card {
        background: var(--white);
        border: 1px solid var(--border);
        border-radius: var(--radius-xl);
        padding: 36px 28px 30px;
        text-align: center;
        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(--primary), var(--accent));
        opacity: 0;
        transition: var(--transition);
    }

    .feature-card:hover {
        transform: translateY(-8px);
        box-shadow: var(--shadow-md);
        border-color: rgba(var(--primary-rgb), 0.2);
    }

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

    .feature-icon {
        width: 68px;
        height: 68px;
        margin: 0 auto 20px;
        border-radius: 18px;
        background: var(--primary-light);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 26px;
        color: var(--primary);
        transition: var(--transition);
    }

    .feature-card:hover .feature-icon {
        background: var(--primary);
        color: #fff;
        box-shadow: var(--shadow-blue);
        transform: scale(1.06);
    }

    .feature-card h3 {
        font-size: 19px;
        font-weight: 700;
        color: var(--text);
        margin: 0 0 10px;
    }

    .feature-card p {
        font-size: 15px;
        color: var(--text-weak);
        line-height: 1.65;
        margin: 0;
    }

    /* ========== Category Entry ========== */
    .category-entry {
        background: var(--body-bg);
        padding: 90px 0;
    }

    .entry-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 30px;
    }

    .entry-card {
        background: var(--white);
        border-radius: var(--radius-xl);
        overflow: hidden;
        border: 1px solid var(--border);
        transition: var(--transition);
        position: relative;
    }

    .entry-card:hover {
        transform: translateY(-8px);
        box-shadow: var(--shadow-md);
    }

    .entry-card-img {
        position: relative;
        height: 200px;
        overflow: hidden;
    }

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

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

    .entry-card-img::after {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(180deg, transparent 40%, rgba(15, 23, 42, 0.35));
    }

    .entry-card-img .badge {
        position: absolute;
        top: 16px;
        left: 16px;
        z-index: 2;
        background: rgba(255, 255, 255, 0.92);
        box-shadow: 0 4px 14px rgba(0, 0, 0, 0.12);
    }

    .entry-card-body {
        padding: 24px 26px 28px;
    }

    .entry-card-body h3 {
        font-size: 20px;
        font-weight: 700;
        color: var(--text);
        margin: 0 0 10px;
    }

    .entry-card-body p {
        font-size: 15px;
        color: var(--text-weak);
        line-height: 1.65;
        margin: 0 0 18px;
    }

    .card-link {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        font-weight: 600;
        font-size: 15px;
        color: var(--primary);
    }

    .card-link i {
        font-size: 13px;
        transition: transform 0.3s ease;
    }

    .card-link:hover i {
        transform: translateX(4px);
    }

    /* ========== Latest News ========== */
    .latest-news {
        background: var(--white);
        padding: 90px 0;
    }

    .news-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 28px;
    }

    .news-card {
        background: var(--white);
        border: 1px solid var(--border);
        border-radius: var(--radius-xl);
        padding: 28px 30px;
        transition: var(--transition);
        position: relative;
    }

    .news-card:hover {
        box-shadow: var(--shadow-md);
        border-color: rgba(var(--primary-rgb), 0.22);
        transform: translateY(-4px);
    }

    .news-card-top {
        display: flex;
        align-items: center;
        justify-content: space-between;
        margin-bottom: 16px;
        flex-wrap: wrap;
        gap: 10px;
    }

    .news-card-top time {
        font-size: 13px;
        color: var(--text-weak);
    }

    .news-card h3 {
        font-size: 18px;
        font-weight: 700;
        line-height: 1.5;
        margin: 0 0 10px;
    }

    .news-card h3 a {
        color: var(--text);
    }

    .news-card h3 a:hover {
        color: var(--primary);
    }

    .news-card p {
        font-size: 14px;
        color: var(--text-weak);
        line-height: 1.7;
        margin: 0 0 16px;
        display: -webkit-box;
        -webkit-line-clamp: 3;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    .news-card .card-link {
        font-size: 14px;
    }

    .empty-tip {
        grid-column: 1 / -1;
        text-align: center;
        padding: 70px 20px;
        background: var(--body-bg);
        border-radius: var(--radius-xl);
        border: 2px dashed var(--border);
    }

    .empty-tip i {
        font-size: 44px;
        color: var(--text-weak);
        margin-bottom: 16px;
        display: block;
    }

    .empty-tip p {
        font-size: 16px;
        color: var(--text-weak);
        margin: 0;
    }

    /* ========== Steps ========== */
    .steps-section {
        background: linear-gradient(135deg, #101b32 0%, #16224a 100%);
        padding: 90px 0;
        color: #fff;
    }

    .steps-section .section-header h2 {
        color: #fff;
    }

    .steps-section .section-header p {
        color: rgba(255, 255, 255, 0.6);
    }

    .steps-section .section-tag {
        background: rgba(255, 255, 255, 0.12);
        color: #93c5fd;
    }

    .steps-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 26px;
        position: relative;
    }

    .steps-grid::before {
        content: '';
        position: absolute;
        top: 40px;
        left: 12%;
        right: 12%;
        height: 2px;
        background: linear-gradient(90deg, var(--primary), var(--accent));
        opacity: 0.3;
    }

    .step-item {
        text-align: center;
        position: relative;
        z-index: 1;
    }

    .step-number {
        width: 80px;
        height: 80px;
        margin: 0 auto 22px;
        border-radius: 50%;
        background: rgba(255, 255, 255, 0.06);
        border: 2px solid rgba(255, 255, 255, 0.15);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 28px;
        font-weight: 800;
        color: #93c5fd;
        position: relative;
        transition: var(--transition);
        background: linear-gradient(135deg, rgba(var(--primary-rgb), 0.25), rgba(6, 182, 212, 0.2));
        backdrop-filter: blur(8px);
    }

    .step-item:hover .step-number {
        transform: scale(1.08);
        border-color: var(--accent);
        box-shadow: 0 0 0 8px rgba(6, 182, 212, 0.12);
    }

    .step-item h3 {
        font-size: 18px;
        font-weight: 700;
        margin: 0 0 10px;
        color: #fff;
    }

    .step-item p {
        font-size: 14px;
        color: rgba(255, 255, 255, 0.6);
        line-height: 1.6;
        margin: 0;
    }

    /* ========== Stats ========== */
    .stats-section {
        background: var(--white);
        padding: 80px 0;
        position: relative;
        overflow: hidden;
    }

    .stats-section::before {
        content: '';
        position: absolute;
        right: -120px;
        top: -120px;
        width: 300px;
        height: 300px;
        background: rgba(var(--primary-rgb), 0.05);
        border-radius: 50%;
    }

    .stats-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 30px;
        position: relative;
        z-index: 1;
    }

    .stat-item {
        text-align: center;
        padding: 34px 20px;
        background: var(--body-bg);
        border-radius: var(--radius-xl);
        border: 1px solid var(--border);
        transition: var(--transition);
    }

    .stat-item:hover {
        background: var(--primary-light);
        border-color: rgba(var(--primary-rgb), 0.2);
        transform: translateY(-4px);
    }

    .stat-value {
        font-size: 44px;
        font-weight: 900;
        color: var(--primary);
        line-height: 1.1;
        margin-bottom: 8px;
        letter-spacing: -1px;
    }

    .stat-label {
        font-size: 15px;
        color: var(--text-weak);
        font-weight: 500;
    }

    /* ========== FAQ ========== */
    .faq-section {
        background: var(--body-bg);
        padding: 90px 0;
    }

    .faq-wrap {
        max-width: 860px;
        margin: 0 auto;
        display: flex;
        flex-direction: column;
        gap: 16px;
    }

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

    .faq-item:hover {
        box-shadow: var(--shadow);
        border-color: rgba(var(--primary-rgb), 0.18);
    }

    .faq-item summary {
        padding: 22px 28px;
        cursor: pointer;
        font-size: 16px;
        font-weight: 600;
        color: var(--text);
        display: flex;
        align-items: center;
        gap: 14px;
        transition: var(--transition);
        user-select: none;
        list-style: none;
    }

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

    .faq-item summary::before {
        content: '\f059';
        font-family: 'Font Awesome 6 Free';
        font-weight: 900;
        color: var(--primary);
        font-size: 18px;
        flex-shrink: 0;
    }

    .faq-item summary::after {
        content: '\f078';
        font-family: 'Font Awesome 6 Free';
        font-weight: 900;
        font-size: 13px;
        color: var(--text-weak);
        margin-left: auto;
        transition: var(--transition);
    }

    .faq-item[open] summary {
        color: var(--primary);
    }

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

    .faq-item .faq-body {
        padding: 0 28px 24px 60px;
        font-size: 15px;
        color: var(--text-body);
        line-height: 1.75;
    }

    /* ========== CTA ========== */
    .cta-section {
        background: linear-gradient(135deg, var(--primary) 0%, #3b5cec 40%, var(--accent) 100%);
        padding: 80px 0;
        color: #fff;
        position: relative;
        overflow: hidden;
    }

    .cta-section::before {
        content: '';
        position: absolute;
        top: -60px;
        right: -60px;
        width: 260px;
        height: 260px;
        background: rgba(255, 255, 255, 0.1);
        border-radius: 50%;
    }

    .cta-section::after {
        content: '';
        position: absolute;
        bottom: -80px;
        left: -60px;
        width: 220px;
        height: 220px;
        background: rgba(255, 255, 255, 0.08);
        border-radius: 50%;
    }

    .cta-content {
        text-align: center;
        position: relative;
        z-index: 2;
    }

    .cta-content h2 {
        font-size: clamp(28px, 4.4vw, 44px);
        font-weight: 800;
        margin: 0 0 16px;
        letter-spacing: -0.5px;
    }

    .cta-content p {
        font-size: 18px;
        color: rgba(255, 255, 255, 0.88);
        max-width: 560px;
        margin: 0 auto 34px;
    }

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

    /* ========== Footer ========== */
    .site-footer {
        background: var(--dark-bg);
        color: rgba(255, 255, 255, 0.7);
        padding: 64px 0 24px;
        position: relative;
    }

    .footer-top {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr;
        gap: 48px;
        padding-bottom: 48px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .footer-brand .brand {
        margin-bottom: 16px;
    }

    .footer-brand .brand-text {
        color: #fff;
    }

    .footer-brand .brand-text span {
        color: #93c5fd;
    }

    .footer-brand p {
        font-size: 14px;
        line-height: 1.7;
        max-width: 320px;
        margin: 0;
        color: rgba(255, 255, 255, 0.55);
    }

    .footer-col h4 {
        font-size: 16px;
        font-weight: 700;
        color: #fff;
        margin: 0 0 18px;
    }

    .footer-col ul {
        list-style: none;
        padding: 0;
        margin: 0;
        display: flex;
        flex-direction: column;
        gap: 12px;
    }

    .footer-col ul a {
        color: rgba(255, 255, 255, 0.65);
        font-size: 14px;
        transition: var(--transition);
        display: inline-flex;
        align-items: center;
        gap: 8px;
    }

    .footer-col ul a:hover {
        color: #fff;
        transform: translateX(4px);
    }

    .footer-col ul a i {
        font-size: 12px;
        color: var(--accent);
    }

    .footer-bottom {
        text-align: center;
        padding-top: 28px;
        font-size: 13px;
        color: rgba(255, 255, 255, 0.4);
    }

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

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

    /* ========== Responsive ========== */
    @media screen and (max-width: 1024px) {
        .section-padding {
            padding: 70px 0;
        }
        
        .features-grid {
            grid-template-columns: repeat(2, 1fr);
        }

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

        .steps-grid {
            grid-template-columns: repeat(2, 1fr);
            gap: 40px 24px;
        }

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

    @media screen and (max-width: 768px) {
        body {
            font-size: 15px;
        }

        .container {
            padding: 0 20px;
        }

        .section-header h2 {
            font-size: 30px;
        }

        .header-top {
            padding: 12px 0;
        }

        .header-search input {
            width: 160px;
        }

        .header-search input:focus {
            width: 180px;
        }

        .header-cta {
            padding: 8px 16px;
            font-size: 13px;
        }

        .brand-logo {
            width: 38px;
            height: 38px;
            font-size: 17px;
        }

        .brand-text {
            font-size: 18px;
        }

        .hero {
            padding: 90px 0 100px;
        }

        .hero h1 {
            font-size: 38px;
        }

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

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

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

        .features-grid {
            gap: 20px;
        }

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

    @media screen and (max-width: 520px) {
        .container {
            padding: 0 16px;
        }

        .section-padding {
            padding: 56px 0;
        }

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

        .header-search {
            display: none;
        }

        .header-top {
            padding: 10px 0;
        }

        .brand-text {
            font-size: 17px;
        }

        .brand-sub {
            font-size: 11px;
        }

        .brand-logo {
            width: 36px;
            height: 36px;
            font-size: 16px;
        }

        .header-cta {
            padding: 8px 14px;
            font-size: 13px;
        }

        .channel-tab {
            padding: 7px 16px;
            font-size: 14px;
        }

        .hero {
            padding: 70px 0 80px;
        }

        .hero h1 {
            font-size: 32px;
        }

        .hero-subtitle {
            font-size: 16px;
        }

        .hero-btns {
            gap: 10px;
            flex-direction: column;
            align-items: center;
        }

        .hero-btns .btn {
            width: 100%;
            max-width: 260px;
        }

        .hero-stats {
            gap: 20px;
        }

        .hero-stats .hs-value {
            font-size: 24px;
        }

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

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

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

        .stats-grid {
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
        }

        .stat-value {
            font-size: 32px;
        }

        .cta-btns {
            flex-direction: column;
            align-items: center;
        }

        .cta-btns .btn {
            width: 100%;
            max-width: 280px;
        }
    }

/* roulang page: category1 */
:root {
            --primary: #4F46E5;
            --primary-dark: #4338CA;
            --primary-light: #EEF2FF;
            --accent: #F59E0B;
            --dark: #0F172A;
            --dark-2: #1E293B;
            --bg: #F8FAFC;
            --white: #FFFFFF;
            --text: #1E293B;
            --text-weak: #64748B;
            --border: #E2E8F0;
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 8px;
            --shadow-sm: 0 2px 10px rgba(15, 23, 42, .06);
            --shadow-md: 0 8px 30px rgba(15, 23, 42, .10);
            --shadow-lg: 0 16px 40px rgba(15, 23, 42, .14);
            --font-base: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-base);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color .2s ease;
        }
        ul,
        ol {
            list-style: none;
        }
        button,
        input {
            font-family: inherit;
            outline: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .section {
            padding: 90px 0;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--white);
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
        }
        .header-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            gap: 20px;
            flex-wrap: wrap;
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .brand-logo {
            width: 46px;
            height: 46px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary) 0%, #7C3AED 100%);
            color: #fff;
            font-size: 24px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 12px rgba(79, 70, 229, .3);
            flex-shrink: 0;
        }
        .brand-text {
            font-size: 22px;
            font-weight: 800;
            color: var(--dark);
            line-height: 1.2;
            display: flex;
            flex-direction: column;
        }
        .brand-text>span {
            color: var(--primary);
        }
        .brand-sub {
            display: block;
            font-size: 11px;
            font-weight: 400;
            color: var(--text-weak);
            letter-spacing: .04em;
            margin-top: 2px;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-wrap: wrap;
        }
        .header-search {
            display: flex;
            align-items: center;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 30px;
            padding: 5px 5px 5px 16px;
            transition: border-color .2s, box-shadow .2s;
            width: 260px;
        }
        .header-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(79, 70, 229, .12);
        }
        .header-search input {
            border: none;
            background: transparent;
            font-size: 14px;
            width: 100%;
            color: var(--text);
        }
        .header-search input::placeholder {
            color: #94A3B8;
        }
        .header-search button {
            width: 34px;
            height: 34px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            border: none;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: background .2s;
            flex-shrink: 0;
        }
        .header-search button:hover {
            background: var(--primary-dark);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 14px;
            line-height: 1.5;
            border: 2px solid transparent;
            transition: all .2s ease;
            text-align: center;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 6px 16px rgba(79, 70, 229, .25);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(79, 70, 229, .35);
        }
        .header-cta {
            padding: 8px 18px;
            font-size: 13px;
        }

        .channel-nav-wrap {
            border-top: 1px solid var(--border);
            background: var(--white);
        }
        .channel-nav {
            display: flex;
            gap: 6px;
            padding: 10px 0;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: thin;
        }
        .channel-tab {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: 30px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-weak);
            background: var(--bg);
            border: 1px solid transparent;
            white-space: nowrap;
            transition: all .2s ease;
        }
        .channel-tab:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .channel-tab.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            box-shadow: 0 4px 12px rgba(79, 70, 229, .25);
        }

        .category-hero {
            position: relative;
            padding: 110px 0 100px;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            color: #fff;
            overflow: hidden;
        }
        .category-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(15, 23, 42, .92) 0%, rgba(30, 41, 59, .72) 50%, rgba(79, 70, 229, .45) 100%);
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
        }
        .hero-badge {
            display: inline-block;
            padding: 6px 16px;
            border-radius: 30px;
            background: rgba(255, 255, 255, .16);
            border: 1px solid rgba(255, 255, 255, .3);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: .05em;
            backdrop-filter: blur(6px);
            margin-bottom: 20px;
        }
        .category-hero h1 {
            font-size: 46px;
            font-weight: 800;
            margin-bottom: 16px;
            max-width: 720px;
        }
        .category-hero h1 span {
            color: #C7D2FE;
        }
        .category-hero p {
            font-size: 18px;
            color: rgba(255, 255, 255, .85);
            max-width: 640px;
            margin-bottom: 30px;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            margin-bottom: 42px;
            flex-wrap: wrap;
        }
        .btn-outline {
            background: transparent;
            border-color: rgba(255, 255, 255, .7);
            color: #fff;
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, .12);
            transform: translateY(-2px);
        }
        .hero-stats {
            display: flex;
            gap: 48px;
            padding-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, .2);
            max-width: 620px;
            flex-wrap: wrap;
        }
        .hero-stats div {
            display: flex;
            flex-direction: column;
        }
        .hero-stats strong {
            font-size: 32px;
            font-weight: 800;
            color: #FDE68A;
            line-height: 1.2;
        }
        .hero-stats span {
            font-size: 14px;
            color: rgba(255, 255, 255, .7);
        }

        .section-head {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 50px;
        }
        .section-tag {
            display: inline-block;
            padding: 5px 14px;
            border-radius: 30px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 12px;
        }
        .section-head h2 {
            font-size: 34px;
            font-weight: 800;
            color: var(--dark);
            margin-bottom: 12px;
        }
        .section-head p {
            color: var(--text-weak);
            font-size: 16px;
        }

        .grid-margin-x {
            margin-right: -12px;
            margin-left: -12px;
        }
        .grid-margin-x>.cell {
            padding-right: 12px;
            padding-left: 12px;
        }

        .way-card {
            background: var(--white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            transition: transform .25s ease, box-shadow .25s ease;
            height: 100%;
            border: 1px solid var(--border);
        }
        .way-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }
        .way-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }
        .card-body {
            padding: 26px;
        }
        .badge {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 20px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 12px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .card-body h3 {
            font-size: 20px;
            margin-bottom: 10px;
        }
        .card-body p {
            color: var(--text-weak);
            font-size: 14px;
            margin-bottom: 18px;
        }
        .card-link {
            font-weight: 600;
            color: var(--primary);
            font-size: 14px;
            display: inline-flex;
            gap: 6px;
            align-items: center;
            transition: gap .2s ease;
        }
        .card-link:hover {
            gap: 10px;
        }

        .steps-section {
            background: linear-gradient(135deg, var(--dark) 0%, #1E293B 100%);
            color: #fff;
        }
        .steps-section .section-tag {
            background: rgba(79, 70, 229, .25);
            color: #A5B4FC;
        }
        .steps-section .section-head h2 {
            color: #fff;
        }
        .steps-section .section-head p {
            color: rgba(255, 255, 255, .7);
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 50px;
        }
        .step-item {
            background: rgba(255, 255, 255, .06);
            border: 1px solid rgba(255, 255, 255, .1);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            transition: background .3s, transform .3s;
        }
        .step-item:hover {
            background: rgba(255, 255, 255, .1);
            transform: translateY(-4px);
        }
        .step-num {
            display: inline-flex;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), #7C3AED);
            color: #fff;
            font-weight: 800;
            font-size: 18px;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            box-shadow: 0 8px 20px rgba(79, 70, 229, .35);
        }
        .step-item h3 {
            font-size: 18px;
            margin-bottom: 10px;
        }
        .step-item p {
            font-size: 14px;
            color: rgba(255, 255, 255, .7);
        }

        .guide-section {
            background: var(--white);
        }
        .guide-section img {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            width: 100%;
            object-fit: cover;
        }
        .guide-section h2 {
            font-size: 34px;
            margin-bottom: 12px;
            color: var(--dark);
        }
        .guide-section .section-tag {
            margin-bottom: 12px;
        }
        .guide-section p {
            color: var(--text-weak);
            font-size: 16px;
        }
        .check-list {
            margin-top: 20px;
        }
        .check-list li {
            padding: 8px 0;
            color: var(--text);
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 15px;
        }
        .check-list i {
            color: var(--primary);
            font-size: 18px;
        }
        .guide-section .btn {
            margin-top: 28px;
        }

        .news-section {
            background: var(--bg);
        }
        .news-list {
            max-width: 920px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .news-item {
            display: flex;
            gap: 22px;
            align-items: center;
            background: var(--white);
            border-radius: var(--radius-lg);
            padding: 18px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: transform .2s ease, box-shadow .2s ease;
        }
        .news-item:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .news-thumb {
            flex: 0 0 180px;
        }
        .news-thumb img {
            width: 100%;
            height: 120px;
            object-fit: cover;
            border-radius: var(--radius-md);
        }
        .news-content {
            flex: 1;
        }
        .news-content h3 {
            font-size: 18px;
            margin-bottom: 8px;
        }
        .news-content h3 a:hover {
            color: var(--primary);
        }
        .news-content p {
            font-size: 14px;
            color: var(--text-weak);
            margin-bottom: 8px;
        }
        .news-date {
            font-size: 13px;
            color: var(--text-weak);
        }

        .security-section {
            background: var(--dark);
            color: #fff;
        }
        .security-section .section-tag {
            background: rgba(79, 70, 229, .25);
            color: #A5B4FC;
        }
        .security-section .section-head h2 {
            color: #fff;
        }
        .security-section .section-head p {
            color: rgba(255, 255, 255, .7);
        }
        .security-card {
            background: rgba(255, 255, 255, .06);
            border: 1px solid rgba(255, 255, 255, .1);
            border-radius: var(--radius-lg);
            padding: 28px 22px;
            text-align: center;
            height: 100%;
            transition: background .3s, transform .3s;
        }
        .security-card:hover {
            background: rgba(255, 255, 255, .1);
            transform: translateY(-4px);
        }
        .security-card i {
            font-size: 36px;
            color: #FDE68A;
            margin-bottom: 14px;
        }
        .security-card h3 {
            font-size: 18px;
            margin-bottom: 10px;
        }
        .security-card p {
            font-size: 14px;
            color: rgba(255, 255, 255, .7);
        }

        .faq-section {
            background: var(--white);
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 18px 24px;
            margin-bottom: 14px;
            background: var(--bg);
            transition: border-color .2s, box-shadow .2s;
        }
        .faq-item:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-sm);
        }
        .faq-item summary {
            cursor: pointer;
            font-size: 16px;
            font-weight: 700;
            color: var(--dark);
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: "\f078";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            color: var(--primary);
            transition: transform .3s;
            flex-shrink: 0;
        }
        .faq-item[open] summary::after {
            transform: rotate(180deg);
        }
        .faq-item p {
            margin-top: 14px;
            padding-top: 14px;
            border-top: 1px solid var(--border);
            font-size: 14px;
            color: var(--text-weak);
        }

        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, var(--primary) 0%, #7C3AED 100%);
            color: #fff;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: "";
            position: absolute;
            width: 300px;
            height: 300px;
            background: rgba(255, 255, 255, .08);
            border-radius: 50%;
            top: -120px;
            right: -60px;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 36px;
            margin-bottom: 12px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, .85);
            font-size: 17px;
            margin-bottom: 30px;
        }
        .cta-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn-cta {
            background: #fff;
            color: var(--primary-dark);
            border-color: #fff;
        }
        .btn-cta:hover {
            background: #F8FAFC;
            transform: translateY(-2px);
            box-shadow: 0 10px 24px rgba(0, 0, 0, .2);
        }
        .btn-outline-light {
            border-color: rgba(255, 255, 255, .6);
            color: #fff;
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, .12);
            transform: translateY(-2px);
        }

        .site-footer {
            background: var(--dark-2);
            color: #CBD5E1;
            border-top: 1px solid rgba(255, 255, 255, .04);
            padding: 70px 0 0;
        }
        .footer-top {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }
        .footer-brand .brand-text {
            color: #fff;
        }
        .footer-brand .brand-text>span {
            color: #A5B4FC;
        }
        .footer-brand p {
            margin-top: 16px;
            font-size: 14px;
            color: #94A3B8;
            max-width: 380px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 16px;
            margin-bottom: 16px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul a {
            font-size: 14px;
            color: #94A3B8;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: color .2s, padding-left .2s;
        }
        .footer-col ul a:hover {
            color: #fff;
            padding-left: 6px;
        }
        .footer-bottom {
            padding: 20px 0;
            text-align: center;
            font-size: 13px;
            color: #64748B;
        }

        @media (max-width: 1024px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-top {
                grid-template-columns: 1fr 1fr;
            }
            .header-search {
                width: 200px;
            }
        }
        @media (max-width: 768px) {
            .section {
                padding: 70px 0;
            }
            .header-top {
                flex-direction: column;
                align-items: stretch;
            }
            .header-actions {
                justify-content: space-between;
            }
            .header-search {
                flex: 1;
                width: auto;
            }
            .channel-nav {
                padding: 8px 0;
            }
            .category-hero {
                padding: 80px 0;
            }
            .category-hero h1 {
                font-size: 34px;
            }
            .hero-stats {
                gap: 24px;
            }
            .hero-stats strong {
                font-size: 28px;
            }
            .news-item {
                flex-direction: column;
                align-items: flex-start;
            }
            .news-thumb {
                flex: none;
                width: 100%;
            }
            .news-thumb img {
                height: 160px;
            }
            .guide-section .grid-x>.cell:first-child {
                margin-bottom: 30px;
            }
            .footer-top {
                grid-template-columns: 1fr;
                gap: 30px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .section {
                padding: 56px 0;
            }
            .section-head h2 {
                font-size: 26px;
            }
            .category-hero {
                padding: 70px 0;
            }
            .category-hero h1 {
                font-size: 28px;
            }
            .category-hero p {
                font-size: 16px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 16px;
                margin-top: 30px;
            }
            .step-item {
                padding: 24px 20px;
            }
            .header-actions {
                flex-direction: column;
                align-items: stretch;
                gap: 10px;
            }
            .header-search {
                width: 100%;
            }
            .header-search input {
                flex: 1;
            }
            .header-cta {
                width: 100%;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .hero-stats {
                flex-direction: column;
                gap: 14px;
            }
            .cta-section h2 {
                font-size: 28px;
            }
            .cta-actions .btn {
                width: 100%;
            }
        }

/* roulang page: article */
:root {
    --primary: #2a6df4;
    --primary-dark: #1e56c8;
    --primary-light: #e8f0fe;
    --accent: #ff8a3d;
    --accent-dark: #f06a1f;
    --bg-body: #f6f8fc;
    --bg-card: #ffffff;
    --bg-dark: #101b2c;
    --bg-light: #eef2f8;
    --text-main: #1a2438;
    --text-muted: #64748b;
    --border: #dde5ef;
    --white: #ffffff;
    --radius: 14px;
    --radius-sm: 10px;
    --shadow: 0 4px 20px rgba(26, 36, 56, 0.08);
    --shadow-lg: 0 12px 40px rgba(26, 36, 56, 0.12);
    --transition: all 0.3s ease;
    --container-width: 1220px;
}
* {
    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", sans-serif;
    background: var(--bg-body);
    color: var(--text-main);
    line-height: 1.7;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}
a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition);
}
img {
    max-width: 100%;
    height: auto;
}
button, input {
    font-family: inherit;
}
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}
.section {
    padding: 72px 0;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 11px 24px;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 600;
    border: 0;
    cursor: pointer;
    transition: var(--transition);
    line-height: 1.4;
}
.btn-primary {
    background: var(--primary);
    color: var(--white);
    box-shadow: 0 4px 12px rgba(42, 109, 244, 0.3);
}
.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(42, 109, 244, 0.4);
}
.btn-outline {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}
.btn-outline:hover {
    background: var(--primary);
    color: var(--white);
}
.btn-light {
    background: var(--white);
    color: var(--primary);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
}
.btn-light:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.16);
}
.btn-accent {
    background: var(--accent);
    color: var(--white);
    box-shadow: 0 4px 12px rgba(255, 138, 61, 0.35);
}
.btn-accent:hover {
    background: var(--accent-dark);
    transform: translateY(-2px);
}
.btn-lg {
    padding: 14px 32px;
    font-size: 16px;
}
.btn-block {
    width: 100%;
}

/* ===== Header ===== */
.site-header {
    background: var(--white);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 16px rgba(0, 0, 0, 0.06);
}
.header-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 0;
    flex-wrap: wrap;
}
.brand {
    display: flex;
    align-items: center;
    gap: 12px;
}
.brand-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 46px;
    height: 46px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: var(--white);
    font-weight: 800;
    font-size: 24px;
    box-shadow: 0 4px 14px rgba(42, 109, 244, 0.35);
}
.brand-text {
    font-size: 22px;
    font-weight: 800;
    color: var(--text-main);
    line-height: 1.2;
    display: flex;
    align-items: baseline;
    gap: 4px;
}
.brand-text span {
    color: var(--primary);
    font-weight: 700;
}
.brand-sub {
    display: block;
    font-size: 11px;
    color: var(--text-muted);
    font-weight: 400;
    letter-spacing: 1px;
    margin-top: 2px;
}
.header-actions {
    display: flex;
    align-items: center;
    gap: 14px;
}
.header-search {
    display: flex;
    align-items: center;
    background: var(--bg-light);
    border-radius: 50px;
    padding: 4px 6px 4px 18px;
    border: 1px solid var(--border);
    transition: var(--transition);
}
.header-search:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(42, 109, 244, 0.15);
}
.header-search input {
    border: none;
    background: transparent;
    outline: none;
    font-size: 14px;
    color: var(--text-main);
    min-width: 180px;
}
.header-search button {
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: 50%;
    width: 34px;
    height: 34px;
    cursor: pointer;
    transition: var(--transition);
}
.header-search button:hover {
    background: var(--primary-dark);
}
.header-cta {
    white-space: nowrap;
}
.channel-nav-wrap {
    background: var(--white);
    border-top: 1px solid var(--border);
}
.channel-nav {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 0;
    overflow-x: auto;
    scrollbar-width: thin;
}
.channel-tab {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 9px 22px;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-muted);
    white-space: nowrap;
    transition: var(--transition);
}
.channel-tab:hover {
    background: var(--primary-light);
    color: var(--primary);
}
.channel-tab.active {
    background: var(--primary);
    color: var(--white);
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(42, 109, 244, 0.3);
}

/* ===== Article Banner ===== */
.article-banner {
    position: relative;
    background-size: cover;
    background-position: center;
    padding: 72px 0 64px;
    color: var(--white);
    overflow: hidden;
}
.article-banner::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(16, 27, 44, 0.88), rgba(42, 109, 244, 0.72));
}
.article-banner .container {
    position: relative;
    z-index: 2;
}
.breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 14px;
    margin-bottom: 24px;
    color: rgba(255, 255, 255, 0.85);
}
.breadcrumb a {
    color: rgba(255, 255, 255, 0.85);
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
}
.breadcrumb a:hover {
    color: var(--white);
    border-color: var(--white);
}
.breadcrumb .current {
    color: var(--white);
    font-weight: 500;
}
.article-banner h1 {
    font-size: 38px;
    line-height: 1.3;
    font-weight: 800;
    margin-bottom: 16px;
    max-width: 85%;
}
.article-meta {
    display: flex;
    align-items: center;
    gap: 18px;
    flex-wrap: wrap;
}
.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(255, 255, 255, 0.18);
    border: 1px solid rgba(255, 255, 255, 0.35);
    color: var(--white);
    padding: 4px 14px;
    border-radius: 50px;
    font-size: 13px;
    font-weight: 500;
    backdrop-filter: blur(4px);
}
.meta-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.9);
}

/* ===== Article Section ===== */
.article-section {
    padding: 60px 0;
}
.article-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    padding: 36px 40px;
    border: 1px solid var(--border);
}
.article-body {
    font-size: 16px;
    line-height: 1.9;
    color: var(--text-main);
}
.article-body p {
    margin-bottom: 20px;
}
.article-body h2 {
    font-size: 26px;
    margin: 36px 0 18px;
    font-weight: 700;
    position: relative;
    padding-left: 18px;
}
.article-body h2::before {
    content: '';
    position: absolute;
    left: 0;
    top: 4px;
    bottom: 4px;
    width: 4px;
    background: var(--primary);
    border-radius: 4px;
}
.article-body h3 {
    font-size: 20px;
    margin: 28px 0 14px;
    font-weight: 600;
}
.article-body ul,
.article-body ol {
    margin: 0 0 20px 20px;
}
.article-body li {
    margin-bottom: 8px;
}
.article-body blockquote {
    border-left: 4px solid var(--primary);
    background: var(--primary-light);
    padding: 16px 24px;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    margin-bottom: 20px;
    color: var(--text-muted);
}
.article-body img {
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow);
    margin: 12px 0;
}
.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}
.tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--bg-light);
    color: var(--text-muted);
    padding: 5px 16px;
    border-radius: 50px;
    font-size: 13px;
    transition: var(--transition);
    cursor: default;
}
.tag:hover {
    background: var(--primary-light);
    color: var(--primary);
}
.article-not-found {
    text-align: center;
    padding: 80px 40px;
    background: var(--bg-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}
.article-not-found i {
    font-size: 56px;
    color: var(--primary);
    margin-bottom: 20px;
    opacity: 0.4;
}
.article-not-found h2 {
    font-size: 28px;
    margin-bottom: 12px;
}
.article-not-found p {
    color: var(--text-muted);
    margin-bottom: 28px;
}

/* ===== Sidebar ===== */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 24px;
}
.sidebar-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}
.sidebar-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 18px;
}
.sidebar-card-header i {
    font-size: 20px;
    color: var(--primary);
    background: var(--primary-light);
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
}
.sidebar-card-header h3 {
    font-size: 18px;
    font-weight: 700;
}
.sidebar-list {
    list-style: none;
}
.sidebar-list li {
    margin-bottom: 12px;
}
.sidebar-list a {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 12px 14px;
    border-radius: var(--radius-sm);
    background: var(--bg-light);
    transition: var(--transition);
}
.sidebar-list a:hover {
    background: var(--primary-light);
    transform: translateX(4px);
}
.side-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-main);
    line-height: 1.5;
}
.side-date {
    font-size: 12px;
    color: var(--text-muted);
}
.sidebar-guide p {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 18px;
}

/* ===== Section Header ===== */
.section-header {
    text-align: center;
    margin-bottom: 48px;
}
.section-eyebrow {
    display: inline-block;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--primary);
    text-transform: uppercase;
    background: var(--primary-light);
    padding: 4px 18px;
    border-radius: 50px;
    margin-bottom: 12px;
}
.section-header h2 {
    font-size: 34px;
    font-weight: 800;
    margin-bottom: 12px;
    color: var(--text-main);
}
.section-header p {
    font-size: 16px;
    color: var(--text-muted);
    max-width: 640px;
    margin: 0 auto;
}

/* ===== Related Grid ===== */
.related-section {
    background: var(--white);
}
.related-card {
    display: flex;
    flex-direction: column;
    background: var(--bg-card);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    transition: var(--transition);
    height: 100%;
}
.related-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}
.related-card-img {
    height: 180px;
    background-size: cover;
    background-position: center;
    position: relative;
}
.related-card-img::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(16, 27, 44, 0.35), transparent);
}
.related-card-body {
    padding: 22px;
    flex: 1;
    display: flex;
    flex-direction: column;
}
.badge-light {
    background: var(--primary-light);
    color: var(--primary);
    align-self: flex-start;
    margin-bottom: 12px;
    border: none;
}
.related-card-body h3 {
    font-size: 17px;
    font-weight: 700;
    line-height: 1.5;
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.related-card-body p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.related-date {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: auto;
}

/* ===== FAQ ===== */
.faq-section {
    background: var(--bg-light);
}
.faq-item {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 26px 28px;
    margin-bottom: 24px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    transition: var(--transition);
}
.faq-item:hover {
    box-shadow: var(--shadow-lg);
}
.faq-item h3 {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-main);
}
.faq-item h3 i {
    color: var(--primary);
    margin-right: 8px;
}
.faq-item p {
    font-size: 15px;
    color: var(--text-muted);
    line-height: 1.7;
}

/* ===== CTA ===== */
.cta-section {
    padding: 60px 0;
}
.cta-box {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: 20px;
    padding: 48px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
    flex-wrap: wrap;
    color: var(--white);
    position: relative;
    overflow: hidden;
}
.cta-box::before {
    content: '';
    position: absolute;
    top: -60px;
    right: -60px;
    width: 180px;
    height: 180px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
}
.cta-box::after {
    content: '';
    position: absolute;
    bottom: -40px;
    left: 20%;
    width: 120px;
    height: 120px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 50%;
}
.cta-content {
    max-width: 520px;
    position: relative;
    z-index: 1;
}
.cta-content h2 {
    font-size: 30px;
    font-weight: 800;
    margin-bottom: 12px;
}
.cta-content p {
    font-size: 15px;
    line-height: 1.7;
    opacity: 0.9;
}
.cta-actions {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
}

/* ===== Footer ===== */
.site-footer {
    background: var(--bg-dark);
    color: #9aa7b8;
    padding: 60px 0 0;
}
.footer-top {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.footer-brand .brand .brand-text {
    color: var(--white);
}
.footer-brand .brand-text span {
    color: var(--accent);
}
.footer-brand p {
    font-size: 14px;
    line-height: 1.8;
    margin-top: 18px;
    color: #8a97a8;
    max-width: 320px;
}
.footer-col h4 {
    color: var(--white);
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
}
.footer-col ul {
    list-style: none;
}
.footer-col li {
    margin-bottom: 12px;
}
.footer-col a {
    color: #8a97a8;
    font-size: 14px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition);
}
.footer-col a:hover {
    color: var(--white);
    padding-left: 4px;
}
.footer-bottom {
    padding: 20px 0;
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}
.footer-bottom p {
    font-size: 14px;
    color: #7a8798;
}

/* ===== Responsive ===== */
@media screen and (max-width: 1024px) {
    .section {
        padding: 56px 0;
    }
    .article-banner {
        padding: 52px 0 48px;
    }
    .article-banner h1 {
        font-size: 32px;
    }
}
@media screen and (max-width: 768px) {
    .header-top {
        flex-direction: column;
        gap: 16px;
        align-items: flex-start;
    }
    .header-actions {
        width: 100%;
    }
    .header-search {
        flex: 1;
    }
    .header-search input {
        min-width: 100px;
        width: 100%;
    }
    .section-header h2 {
        font-size: 28px;
    }
    .article-banner h1 {
        font-size: 26px;
        max-width: 100%;
    }
    .article-card {
        padding: 24px;
    }
    .cta-box {
        flex-direction: column;
        padding: 36px 28px;
    }
    .cta-actions {
        width: 100%;
    }
    .cta-actions .btn {
        flex: 1;
    }
    .footer-top {
        grid-template-columns: 1fr;
        gap: 32px;
    }
}
@media screen and (max-width: 520px) {
    .container {
        padding: 0 16px;
    }
    .brand-text {
        font-size: 19px;
    }
    .brand-sub {
        font-size: 10px;
    }
    .header-actions {
        flex-direction: column;
    }
    .header-cta {
        width: 100%;
    }
    .channel-tab {
        padding: 8px 16px;
        font-size: 14px;
    }
    .section {
        padding: 44px 0;
    }
    .article-section {
        padding: 32px 0 44px;
    }
    .article-banner {
        padding: 40px 0 36px;
    }
    .article-banner h1 {
        font-size: 22px;
    }
    .article-meta {
        gap: 10px;
    }
    .article-card {
        padding: 18px;
    }
    .article-body {
        font-size: 15px;
    }
    .article-body h2 {
        font-size: 21px;
    }
    .section-header h2 {
        font-size: 24px;
    }
    .cta-box {
        padding: 28px 20px;
    }
    .cta-content h2 {
        font-size: 24px;
    }
    .cta-actions .btn {
        width: 100%;
    }
}