/* roulang page: index */
/* ===== Reset & Base ===== */
    *, *::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, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Segoe UI", sans-serif;
        font-size: 16px;
        line-height: 1.65;
        color: var(--text);
        background: var(--bg);
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
    img { max-width: 100%; display: block; border: none; }
    a { text-decoration: none; color: inherit; }
    a:hover { color: inherit; }
    button { cursor: pointer; border: none; background: none; font-family: inherit; }
    input, select, textarea { font-family: inherit; font-size: inherit; }
    ul, ol { list-style: none; }

    :root {
        --primary: #153a63;
        --primary-dark: #0e294a;
        --primary-light: #245a8f;
        --accent: #d99a2b;
        --accent-light: #f0bf6e;
        --accent-dark: #b87d17;
        --cta: #e35d4a;
        --cta-hover: #c74a39;
        --bg: #f4f6f9;
        --surface: #ffffff;
        --surface-alt: #eef1f6;
        --text: #1f2d3d;
        --text-light: #5c6f84;
        --text-muted: #8a9aa9;
        --border: #dde3ec;
        --border-light: #edf0f4;
        --radius-sm: 8px;
        --radius-md: 16px;
        --radius-lg: 24px;
        --shadow-sm: 0 2px 8px rgba(15, 42, 74, 0.06);
        --shadow-md: 0 6px 24px rgba(15, 42, 74, 0.08);
        --shadow-lg: 0 16px 48px rgba(15, 42, 74, 0.12);
        --space-section: 96px;
        --space-section-mobile: 64px;
        --container-width: 1200px;
    }

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

    /* ===== Buttons ===== */
    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        padding: 13px 30px;
        font-size: 15px;
        font-weight: 600;
        border-radius: 50px;
        transition: all 0.3s ease;
        cursor: pointer;
        white-space: nowrap;
        border: 2px solid transparent;
        line-height: 1.4;
    }
    .btn-primary {
        background: var(--primary);
        color: #fff;
        box-shadow: var(--shadow-md);
    }
    .btn-primary:hover {
        background: var(--primary-light);
        transform: translateY(-2px);
        box-shadow: var(--shadow-lg);
    }
    .btn-accent {
        background: var(--accent);
        color: #fff;
        box-shadow: var(--shadow-md);
    }
    .btn-accent:hover {
        background: var(--accent-dark);
        transform: translateY(-2px);
        box-shadow: var(--shadow-lg);
    }
    .btn-cta {
        background: var(--cta);
        color: #fff;
        box-shadow: var(--shadow-md);
    }
    .btn-cta:hover {
        background: var(--cta-hover);
        transform: translateY(-2px);
        box-shadow: var(--shadow-lg);
    }
    .btn-outline {
        background: rgba(255,255,255,0.12);
        color: #fff;
        border-color: rgba(255,255,255,0.6);
        backdrop-filter: blur(4px);
    }
    .btn-outline:hover {
        background: rgba(255,255,255,0.22);
        transform: translateY(-2px);
    }
    .btn-outline-dark {
        background: transparent;
        color: var(--primary);
        border-color: var(--primary);
    }
    .btn-outline-dark:hover {
        background: var(--primary);
        color: #fff;
        transform: translateY(-2px);
    }
    .btn-sm {
        padding: 8px 20px;
        font-size: 14px;
    }
    .btn:focus-visible, .nav-link:focus-visible, a:focus-visible {
        outline: 3px solid rgba(217, 154, 43, 0.5);
        outline-offset: 2px;
    }

    .section-tag {
        display: inline-block;
        background: rgba(217, 154, 43, 0.12);
        color: var(--accent-dark);
        font-size: 13px;
        font-weight: 600;
        letter-spacing: 1px;
        padding: 6px 16px;
        border-radius: 50px;
        text-transform: uppercase;
        margin-bottom: 14px;
    }

    .section-head {
        text-align: center;
        max-width: 680px;
        margin: 0 auto 52px;
    }
    .section-head h2 {
        font-size: 34px;
        font-weight: 800;
        color: var(--primary-dark);
        line-height: 1.3;
        margin-bottom: 12px;
    }
    .section-head p {
        font-size: 16px;
        color: var(--text-light);
        line-height: 1.7;
    }

    /* ===== Header ===== */
    .site-header {
        position: sticky;
        top: 0;
        z-index: 1000;
        width: 100%;
        box-shadow: var(--shadow-sm);
    }
    .header-top {
        background: var(--primary-dark);
        padding: 12px 0;
        border-bottom: 1px solid rgba(255,255,255,0.06);
    }
    .header-top-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 20px;
    }
    .logo {
        font-size: 24px;
        font-weight: 800;
        color: #fff;
        letter-spacing: 0.5px;
        display: flex;
        align-items: center;
        gap: 6px;
        white-space: nowrap;
    }
    .logo i {
        color: var(--accent);
        font-size: 20px;
    }
    .logo:hover {
        color: var(--accent-light);
    }
    .header-tools {
        display: flex;
        align-items: center;
        gap: 16px;
    }
    .header-search {
        display: flex;
        align-items: center;
        background: rgba(255,255,255,0.1);
        border-radius: 50px;
        padding: 4px 6px 4px 16px;
        transition: background 0.3s;
    }
    .header-search:focus-within {
        background: rgba(255,255,255,0.16);
    }
    .header-search input {
        background: none;
        border: none;
        outline: none;
        color: #fff;
        font-size: 14px;
        width: 180px;
    }
    .header-search input::placeholder {
        color: rgba(255,255,255,0.5);
    }
    .header-search button {
        color: #fff;
        background: var(--accent);
        border-radius: 50%;
        width: 32px;
        height: 32px;
        display: flex;
        align-items: center;
        justify-content: center;
        transition: background 0.3s;
        font-size: 14px;
    }
    .header-search button:hover {
        background: var(--accent-light);
        color: var(--primary-dark);
    }
    .nav-toggle {
        display: none;
        flex-direction: column;
        gap: 5px;
        padding: 8px;
        background: rgba(255,255,255,0.12);
        border-radius: 8px;
        color: #fff;
        font-size: 18px;
        width: 42px;
        height: 42px;
        align-items: center;
        justify-content: center;
    }
    .nav-toggle:hover {
        background: rgba(255,255,255,0.2);
    }
    .header-bottom {
        background: var(--surface);
        border-bottom: 1px solid var(--border);
    }
    .main-nav {
        display: flex;
        gap: 8px;
        padding: 0;
        overflow-x: auto;
        scrollbar-width: thin;
        -webkit-overflow-scrolling: touch;
        white-space: nowrap;
    }
    .main-nav::-webkit-scrollbar {
        height: 0;
    }
    .nav-link {
        position: relative;
        display: inline-flex;
        align-items: center;
        padding: 15px 22px;
        font-size: 15px;
        font-weight: 600;
        color: var(--text-light);
        border-bottom: 3px solid transparent;
        transition: color 0.25s, border-color 0.25s;
    }
    .nav-link:hover {
        color: var(--primary);
        background: rgba(21, 58, 99, 0.04);
    }
    .nav-link.active {
        color: var(--primary);
        border-bottom-color: var(--accent);
    }
    .nav-link.active::after {
        content: "";
        position: absolute;
        bottom: -1px;
        left: 50%;
        transform: translateX(-50%);
        width: 24px;
        height: 3px;
        background: transparent;
    }

    /* ===== Hero ===== */
    .hero {
        position: relative;
        background-image: linear-gradient(135deg, rgba(8, 24, 46, 0.92) 0%, rgba(16, 48, 82, 0.82) 55%, rgba(26, 68, 110, 0.72) 100%), url('/assets/images/backpic/back-1.png');
        background-size: cover;
        background-position: center;
        background-attachment: fixed;
        color: #fff;
        padding: 110px 0 100px;
        overflow: hidden;
    }
    .hero::before {
        content: "";
        position: absolute;
        top: -120px;
        right: -80px;
        width: 420px;
        height: 420px;
        background: radial-gradient(circle, rgba(217, 154, 43, 0.2) 0%, transparent 70%);
        border-radius: 50%;
        pointer-events: none;
    }
    .hero-inner {
        position: relative;
        z-index: 2;
        text-align: center;
        max-width: 860px;
    }
    .hero-badge {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        background: rgba(217, 154, 43, 0.16);
        border: 1px solid rgba(217, 154, 43, 0.35);
        color: var(--accent-light);
        font-size: 13px;
        font-weight: 600;
        letter-spacing: 1px;
        padding: 8px 20px;
        border-radius: 50px;
        margin-bottom: 28px;
        backdrop-filter: blur(4px);
    }
    .hero-badge i {
        font-size: 14px;
    }
    .hero h1 {
        font-size: 54px;
        font-weight: 900;
        line-height: 1.15;
        letter-spacing: 1px;
        margin-bottom: 20px;
        background: linear-gradient(135deg, #ffffff 40%, #e8c38a 100%);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
        text-shadow: 0 4px 30px rgba(0,0,0,0.15);
    }
    .hero-subtitle {
        font-size: 18px;
        line-height: 1.8;
        color: rgba(255,255,255,0.85);
        max-width: 680px;
        margin: 0 auto 36px;
    }
    .hero-actions {
        display: flex;
        justify-content: center;
        gap: 16px;
        flex-wrap: wrap;
        margin-bottom: 48px;
    }
    .hero-trust {
        display: flex;
        justify-content: center;
        gap: 32px;
        flex-wrap: wrap;
    }
    .hero-trust-item {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 14px;
        color: rgba(255,255,255,0.75);
    }
    .hero-trust-item i {
        color: var(--accent-light);
        font-size: 16px;
    }

    /* ===== Stats ===== */
    .stats-section {
        background: var(--surface);
        border-bottom: 1px solid var(--border);
        padding: 56px 0;
    }
    .stats-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 24px;
    }
    .stat-card {
        text-align: center;
        padding: 24px 16px;
        border-radius: var(--radius-md);
        transition: transform 0.3s, box-shadow 0.3s;
    }
    .stat-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-md);
    }
    .stat-num {
        font-size: 40px;
        font-weight: 800;
        color: var(--primary);
        line-height: 1.2;
        margin-bottom: 4px;
    }
    .stat-num span {
        color: var(--accent);
        font-size: 32px;
    }
    .stat-label {
        font-size: 14px;
        color: var(--text-light);
        font-weight: 500;
    }

    /* ===== Features ===== */
    .features-section {
        padding: var(--space-section) 0;
    }
    .features-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 28px;
    }
    .feature-card {
        background: var(--surface);
        border-radius: var(--radius-lg);
        border: 1px solid var(--border-light);
        overflow: hidden;
        box-shadow: var(--shadow-sm);
        transition: transform 0.3s ease, box-shadow 0.3s ease;
    }
    .feature-card:hover {
        transform: translateY(-6px);
        box-shadow: var(--shadow-md);
    }
    .feature-media {
        position: relative;
        height: 200px;
        overflow: hidden;
    }
    .feature-media img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform 0.5s ease;
    }
    .feature-card:hover .feature-media img {
        transform: scale(1.05);
    }
    .feature-media::after {
        content: "";
        position: absolute;
        bottom: 0;
        left: 0;
        right: 0;
        height: 80px;
        background: linear-gradient(to top, rgba(255,255,255,0.92), transparent);
    }
    .feature-body {
        padding: 24px 26px 30px;
        position: relative;
    }
    .feature-icon {
        width: 52px;
        height: 52px;
        border-radius: 14px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 22px;
        background: linear-gradient(135deg, var(--primary), var(--primary-light));
        color: #fff;
        margin-bottom: 16px;
        box-shadow: 0 6px 16px rgba(21, 58, 99, 0.25);
    }
    .feature-card:nth-child(2) .feature-icon {
        background: linear-gradient(135deg, var(--accent), #f0bf6e);
        box-shadow: 0 6px 16px rgba(217, 154, 43, 0.25);
    }
    .feature-card:nth-child(3) .feature-icon {
        background: linear-gradient(135deg, var(--cta), #f28576);
        box-shadow: 0 6px 16px rgba(227, 93, 74, 0.25);
    }
    .feature-body h3 {
        font-size: 20px;
        font-weight: 700;
        color: var(--primary-dark);
        margin-bottom: 10px;
    }
    .feature-body p {
        font-size: 14px;
        line-height: 1.75;
        color: var(--text-light);
    }

    /* ===== Guide Section ===== */
    .guide-section {
        padding: var(--space-section) 0;
        background: var(--surface-alt);
    }
    .guide-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
    }
    .guide-card {
        position: relative;
        background: var(--surface);
        border-radius: var(--radius-lg);
        padding: 34px 28px;
        text-align: center;
        border: 1px solid var(--border-light);
        overflow: hidden;
        transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
        display: block;
    }
    .guide-card:hover {
        transform: translateY(-6px);
        box-shadow: var(--shadow-md);
        border-color: rgba(217, 154, 43, 0.3);
    }
    .guide-card::before {
        content: "";
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        height: 4px;
        background: linear-gradient(90deg, var(--primary), var(--accent), var(--cta));
        opacity: 0;
        transition: opacity 0.3s;
    }
    .guide-card:hover::before {
        opacity: 1;
    }
    .guide-icon {
        width: 70px;
        height: 70px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 27px;
        margin: 0 auto 20px;
        background: rgba(217, 154, 43, 0.12);
        color: var(--accent-dark);
        transition: background 0.3s, color 0.3s, transform 0.3s;
    }
    .guide-card:hover .guide-icon {
        background: var(--accent);
        color: #fff;
        transform: scale(1.06);
    }
    .guide-card h3 {
        font-size: 19px;
        font-weight: 700;
        color: var(--primary-dark);
        margin-bottom: 10px;
    }
    .guide-card p {
        font-size: 14px;
        color: var(--text-light);
        line-height: 1.7;
        margin-bottom: 16px;
    }
    .guide-more {
        font-size: 14px;
        font-weight: 600;
        color: var(--primary);
        display: inline-flex;
        align-items: center;
        gap: 6px;
        transition: gap 0.3s;
    }
    .guide-card:hover .guide-more {
        gap: 10px;
        color: var(--accent-dark);
    }

    /* ===== News ===== */
    .news-section {
        padding: var(--space-section) 0;
    }
    .news-list {
        max-width: 860px;
        margin: 0 auto;
    }
    .news-item {
        display: flex;
        align-items: center;
        gap: 20px;
        background: var(--surface);
        border-radius: var(--radius-md);
        padding: 20px 24px;
        margin-bottom: 14px;
        border: 1px solid var(--border-light);
        transition: all 0.3s ease;
    }
    .news-item:hover {
        border-color: rgba(21, 58, 99, 0.15);
        box-shadow: var(--shadow-sm);
        transform: translateX(4px);
    }
    .news-badge {
        flex-shrink: 0;
        display: inline-flex;
        background: rgba(21, 58, 99, 0.08);
        color: var(--primary);
        font-size: 12px;
        font-weight: 600;
        padding: 4px 12px;
        border-radius: 50px;
        white-space: nowrap;
    }
    .news-meta {
        flex-shrink: 0;
        font-size: 13px;
        color: var(--text-muted);
        display: flex;
        align-items: center;
        gap: 6px;
        white-space: nowrap;
    }
    .news-item h3 {
        flex: 1;
        font-size: 16px;
        font-weight: 600;
        color: var(--text);
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }
    .news-item h3:hover {
        color: var(--primary);
    }
    .news-arrow {
        color: var(--text-muted);
        font-size: 14px;
        transition: transform 0.3s, color 0.3s;
        flex-shrink: 0;
    }
    .news-item:hover .news-arrow {
        transform: translateX(4px);
        color: var(--accent-dark);
    }
    .news-empty {
        text-align: center;
        padding: 48px 20px;
        color: var(--text-muted);
        background: var(--surface);
        border-radius: var(--radius-lg);
        border: 1px dashed var(--border);
    }
    .news-empty i {
        font-size: 36px;
        color: var(--border);
        margin-bottom: 12px;
    }
    .news-empty p {
        font-size: 15px;
    }
    .news-link-more {
        display: block;
        text-align: center;
        margin-top: 32px;
    }

    /* ===== About ===== */
    .about-section {
        padding: var(--space-section) 0;
        background: var(--primary-dark);
        color: #fff;
        position: relative;
        overflow: hidden;
    }
    .about-section::before {
        content: "";
        position: absolute;
        bottom: -180px;
        left: -120px;
        width: 400px;
        height: 400px;
        background: radial-gradient(circle, rgba(217, 154, 43, 0.15), transparent 70%);
        border-radius: 50%;
        pointer-events: none;
    }
    .about-section .section-tag {
        background: rgba(217, 154, 43, 0.2);
        color: var(--accent-light);
    }
    .about-section .section-head h2 {
        color: #fff;
    }
    .about-section .section-head p {
        color: rgba(255,255,255,0.7);
    }
    .about-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 52px;
        align-items: center;
    }
    .about-visual {
        position: relative;
        border-radius: var(--radius-lg);
        overflow: hidden;
        box-shadow: var(--shadow-lg);
    }
    .about-visual img {
        width: 100%;
        height: 420px;
        object-fit: cover;
    }
    .about-visual::after {
        content: "";
        position: absolute;
        bottom: 0;
        left: 0;
        right: 0;
        height: 100px;
        background: linear-gradient(to top, rgba(14, 41, 74, 0.35), transparent);
    }
    .about-exp-card {
        position: absolute;
        bottom: 24px;
        left: 24px;
        background: rgba(255,255,255,0.92);
        backdrop-filter: blur(8px);
        border-radius: var(--radius-md);
        padding: 16px 22px;
        display: flex;
        flex-direction: column;
        align-items: center;
        box-shadow: var(--shadow-lg);
        z-index: 2;
    }
    .about-exp-card .exp-num {
        font-size: 30px;
        font-weight: 800;
        color: var(--primary);
        line-height: 1.2;
    }
    .about-exp-card .exp-label {
        font-size: 13px;
        color: var(--text-light);
    }
    .about-list {
        display: flex;
        flex-direction: column;
        gap: 24px;
    }
    .about-item {
        display: flex;
        gap: 16px;
        align-items: flex-start;
        background: rgba(255,255,255,0.05);
        border: 1px solid rgba(255,255,255,0.08);
        border-radius: var(--radius-md);
        padding: 20px 22px;
        transition: background 0.3s, transform 0.3s;
    }
    .about-item:hover {
        background: rgba(255,255,255,0.1);
        transform: translateX(4px);
    }
    .about-icon {
        flex-shrink: 0;
        width: 40px;
        height: 40px;
        border-radius: 10px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: var(--accent);
        color: #fff;
        font-size: 17px;
    }
    .about-item h3 {
        font-size: 17px;
        font-weight: 700;
        color: #fff;
        margin-bottom: 4px;
    }
    .about-item p {
        font-size: 14px;
        color: rgba(255,255,255,0.7);
        line-height: 1.7;
    }

    /* ===== Process ===== */
    .process-section {
        padding: var(--space-section) 0;
    }
    .process-steps {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 26px;
        position: relative;
    }
    .process-steps::before {
        content: "";
        position: absolute;
        top: 38px;
        left: 10%;
        right: 10%;
        height: 2px;
        background: linear-gradient(90deg, var(--primary), var(--accent), rgba(217, 154, 43, 0.2));
        border-radius: 2px;
    }
    .process-step {
        text-align: center;
        position: relative;
        z-index: 1;
        padding: 0 10px;
    }
    .step-num {
        width: 76px;
        height: 76px;
        margin: 0 auto 18px;
        border-radius: 50%;
        background: var(--surface);
        border: 3px solid var(--primary);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 22px;
        font-weight: 800;
        color: var(--primary);
        box-shadow: 0 0 0 6px rgba(21, 58, 99, 0.08);
        transition: background 0.3s, color 0.3s, transform 0.3s;
    }
    .process-step:hover .step-num {
        background: var(--primary);
        color: #fff;
        transform: scale(1.05);
    }
    .process-step:nth-child(2) .step-num {
        border-color: var(--accent);
        color: var(--accent-dark);
        box-shadow: 0 0 0 6px rgba(217, 154, 43, 0.1);
    }
    .process-step:nth-child(2):hover .step-num {
        background: var(--accent);
        color: #fff;
    }
    .process-step:nth-child(3) .step-num {
        border-color: var(--cta);
        color: var(--cta);
        box-shadow: 0 0 0 6px rgba(227, 93, 74, 0.08);
    }
    .process-step:nth-child(3):hover .step-num {
        background: var(--cta);
        color: #fff;
    }
    .process-step h3 {
        font-size: 17px;
        font-weight: 700;
        color: var(--primary-dark);
        margin-bottom: 8px;
    }
    .process-step p {
        font-size: 14px;
        color: var(--text-light);
        line-height: 1.7;
    }

    /* ===== FAQ ===== */
    .faq-section {
        padding: var(--space-section) 0;
        background: var(--surface-alt);
    }
    .faq-list {
        max-width: 840px;
        margin: 0 auto;
    }
    .faq-item {
        background: var(--surface);
        border: 1px solid var(--border-light);
        border-radius: var(--radius-md);
        margin-bottom: 14px;
        overflow: hidden;
        transition: box-shadow 0.3s;
    }
    .faq-item:hover {
        box-shadow: var(--shadow-sm);
    }
    .faq-item details {
        padding: 0;
    }
    .faq-item summary {
        display: flex;
        justify-content: space-between;
        align-items: center;
        gap: 16px;
        padding: 20px 24px;
        font-size: 16px;
        font-weight: 600;
        color: var(--text);
        cursor: pointer;
        list-style: none;
        user-select: none;
        transition: color 0.3s;
    }
    .faq-item summary::-webkit-details-marker {
        display: none;
    }
    .faq-item summary:hover {
        color: var(--primary);
    }
    .faq-item summary i {
        color: var(--accent);
        font-size: 14px;
        transition: transform 0.3s;
        flex-shrink: 0;
    }
    .faq-item details[open] summary i {
        transform: rotate(180deg);
    }
    .faq-answer {
        padding: 0 24px 20px;
        color: var(--text-light);
        font-size: 14px;
        line-height: 1.8;
        border-top: 1px solid var(--border-light);
        margin: 0 0 0;
        padding-top: 14px;
    }

    /* ===== CTA ===== */
    .cta-section {
        position: relative;
        background-image: linear-gradient(135deg, rgba(8, 24, 46, 0.9) 0%, rgba(16, 48, 82, 0.85) 100%), url('/assets/images/backpic/back-3.png');
        background-size: cover;
        background-position: center;
        padding: 84px 0;
        text-align: center;
        color: #fff;
    }
    .cta-section h2 {
        font-size: 36px;
        font-weight: 800;
        margin-bottom: 14px;
        color: #fff;
    }
    .cta-section p {
        font-size: 17px;
        color: rgba(255,255,255,0.75);
        max-width: 600px;
        margin: 0 auto 28px;
        line-height: 1.7;
    }
    .cta-actions {
        display: flex;
        justify-content: center;
        gap: 16px;
        flex-wrap: wrap;
    }
    .cta-note {
        display: block;
        margin-top: 18px;
        font-size: 13px;
        color: rgba(255,255,255,0.4);
    }

    /* ===== Footer ===== */
    .site-footer {
        background: var(--primary-dark);
        color: rgba(255,255,255,0.7);
        padding: 60px 0 0;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr;
        gap: 40px;
        padding-bottom: 40px;
    }
    .footer-brand .logo {
        margin-bottom: 12px;
    }
    .footer-brand p {
        font-size: 14px;
        line-height: 1.7;
        max-width: 320px;
    }
    .footer-col h4 {
        font-size: 15px;
        font-weight: 700;
        color: #fff;
        margin-bottom: 16px;
        letter-spacing: 1px;
    }
    .footer-col ul li {
        margin-bottom: 10px;
    }
    .footer-col ul a {
        font-size: 14px;
        color: rgba(255,255,255,0.6);
        transition: color 0.3s, padding-left 0.3s;
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }
    .footer-col ul a:hover {
        color: var(--accent-light);
        padding-left: 4px;
    }
    .footer-col ul a i {
        font-size: 12px;
    }
    .footer-bottom {
        border-top: 1px solid rgba(255,255,255,0.08);
        padding: 20px 0;
        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);
    }

    /* ===== Media Queries ===== */
    @media (max-width: 1024px) {
        .features-grid {
            gap: 20px;
        }
        .about-grid {
            gap: 32px;
        }
        .process-steps {
            gap: 16px;
        }
        .hero h1 {
            font-size: 44px;
        }
        .stat-num {
            font-size: 32px;
        }
        .header-search input {
            width: 140px;
        }
    }

    @media (max-width: 768px) {
        :root {
            --space-section: var(--space-section-mobile);
        }
        .header-top-inner {
            flex-wrap: wrap;
        }
        .header-search input {
            width: 120px;
        }
        .nav-toggle {
            display: flex;
        }
        .main-nav {
            display: none;
            flex-direction: column;
            padding: 6px 16px;
            gap: 4px;
            background: var(--surface);
        }
        .main-nav.open {
            display: flex;
        }
        .nav-link {
            padding: 13px 14px;
            border-bottom: none;
            border-left: 3px solid transparent;
            font-size: 15px;
        }
        .nav-link.active {
            border-left-color: var(--accent);
            border-bottom: none;
        }
        .hero {
            background-attachment: scroll;
            padding: 70px 0 64px;
        }
        .hero h1 {
            font-size: 34px;
        }
        .hero-subtitle {
            font-size: 16px;
        }
        .hero-actions {
            flex-direction: column;
            align-items: center;
        }
        .hero-trust {
            flex-direction: column;
            gap: 12px;
        }
        .stats-grid {
            grid-template-columns: repeat(2, 1fr);
        }
        .features-grid {
            grid-template-columns: 1fr;
        }
        .guide-grid {
            grid-template-columns: 1fr;
        }
        .about-grid {
            grid-template-columns: 1fr;
        }
        .about-visual img {
            height: 300px;
        }
        .process-steps {
            grid-template-columns: repeat(2, 1fr);
            gap: 28px 16px;
        }
        .process-steps::before {
            display: none;
        }
        .news-item {
            flex-wrap: wrap;
            gap: 12px;
        }
        .news-item h3 {
            flex: 0 0 100%;
            white-space: normal;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
        }
        .section-head h2 {
            font-size: 27px;
        }
        .cta-section h2 {
            font-size: 28px;
        }
        .footer-grid {
            grid-template-columns: 1fr;
            gap: 28px;
        }
        .header-search {
            flex: 1;
            max-width: 200px;
        }
    }

    @media (max-width: 520px) {
        .container {
            padding: 0 18px;
        }
        .header-top-inner {
            gap: 12px;
        }
        .logo {
            font-size: 19px;
        }
        .logo i {
            font-size: 16px;
        }
        .header-tools {
            gap: 10px;
        }
        .header-search input {
            width: 90px;
            font-size: 13px;
        }
        .header-search {
            padding: 3px 4px 3px 12px;
        }
        .btn-sm {
            padding: 7px 14px;
            font-size: 13px;
        }
        .hero {
            padding: 56px 0 52px;
        }
        .hero h1 {
            font-size: 30px;
            letter-spacing: 0;
        }
        .hero-subtitle {
            font-size: 15px;
            line-height: 1.65;
        }
        .hero-badge {
            font-size: 12px;
            padding: 6px 14px;
            margin-bottom: 20px;
        }
        .btn {
            padding: 11px 24px;
            font-size: 14px;
            width: 100%;
        }
        .stats-grid {
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }
        .stat-num {
            font-size: 27px;
        }
        .stat-label {
            font-size: 13px;
        }
        .features-section,
        .guide-section,
        .news-section,
        .about-section,
        .process-section,
        .faq-section,
        .cta-section {
            padding-top: 56px;
            padding-bottom: 56px;
        }
        .section-head h2 {
            font-size: 24px;
        }
        .section-head p {
            font-size: 14px;
        }
        .process-steps {
            grid-template-columns: 1fr;
        }
        .guides-section .guide-grid {
            grid-template-columns: 1fr;
        }
        .news-item {
            padding: 16px;
        }
        .news-badge {
            font-size: 11px;
        }
        .news-meta {
            font-size: 12px;
        }
        .news-arrow {
            display: none;
        }
        .cta-actions {
            flex-direction: column;
            align-items: center;
        }
        .cta-actions .btn {
            max-width: 260px;
        }
        .faq-item summary {
            font-size: 14px;
            padding: 16px 18px;
        }
        .faq-answer {
            padding: 12px 18px 18px;
            font-size: 13px;
        }
        .footer-grid {
            padding-bottom: 24px;
        }
        .footer-bottom {
            padding: 16px 0;
        }
    }

/* roulang page: article */
:root {
        --primary: #0b1a33;
        --primary-light: #132a4d;
        --primary-dark: #060f1f;
        --accent: #c9a86a;
        --accent-bright: #e0c88a;
        --accent-dark: #a8864a;
        --bg: #f6f3ee;
        --card-bg: #ffffff;
        --text: #1a2233;
        --text-weak: #6b7280;
        --border: #e5e1da;
        --radius: 16px;
        --radius-sm: 10px;
        --shadow: 0 4px 20px rgba(11, 26, 51, 0.08);
        --shadow-hover: 0 8px 30px rgba(11, 26, 51, 0.14);
        --transition: all 0.25s ease;
        --content-width: 1180px;
    }

    *,
    *::before,
    *::after {
        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: 1.7;
        color: var(--text);
        background: var(--bg);
        -webkit-font-smoothing: antialiased;
    }

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

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

    button,
    input {
        font-family: inherit;
        font-size: inherit;
        border: none;
        background: none;
        outline: none;
    }

    ul,
    ol {
        list-style: none;
    }

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

    /* ========== Header 双层导航 ========== */
    .site-header {
        background: var(--primary);
        color: #fff;
        box-shadow: 0 4px 24px rgba(11, 26, 51, 0.25);
        position: sticky;
        top: 0;
        z-index: 999;
    }

    .header-top {
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .header-top-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 68px;
        gap: 16px;
    }

    .logo {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        font-size: 20px;
        font-weight: 800;
        color: #fff;
        letter-spacing: 0.5px;
    }

    .logo i {
        font-size: 22px;
        color: var(--accent-bright);
    }

    .header-tools {
        display: flex;
        align-items: center;
        gap: 12px;
    }

    .header-search {
        display: flex;
        align-items: center;
        background: rgba(255, 255, 255, 0.1);
        border: 1px solid rgba(255, 255, 255, 0.15);
        border-radius: 40px;
        overflow: hidden;
        height: 38px;
        transition: var(--transition);
    }

    .header-search:focus-within {
        border-color: var(--accent);
        background: rgba(255, 255, 255, 0.15);
    }

    .header-search input {
        border: none;
        background: transparent;
        padding: 0 14px;
        color: #fff;
        font-size: 14px;
        width: 180px;
    }

    .header-search input::placeholder {
        color: rgba(255, 255, 255, 0.6);
    }

    .header-search button {
        width: 40px;
        height: 38px;
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--accent-bright);
        cursor: pointer;
        font-size: 14px;
        transition: var(--transition);
    }

    .header-search button:hover {
        color: #fff;
    }

    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        padding: 10px 24px;
        border-radius: 40px;
        font-weight: 600;
        font-size: 14px;
        cursor: pointer;
        transition: var(--transition);
        border: 1px solid transparent;
        line-height: 1.4;
    }

    .btn-accent {
        background: var(--accent);
        color: #0b1a33;
        border-color: var(--accent);
    }

    .btn-accent:hover {
        background: var(--accent-bright);
        border-color: var(--accent-bright);
        transform: translateY(-2px);
        box-shadow: 0 6px 20px rgba(201, 168, 106, 0.35);
    }

    .btn-sm {
        padding: 7px 18px;
        font-size: 13px;
    }

    .btn-outline {
        background: transparent;
        border-color: var(--accent);
        color: var(--accent);
    }

    .btn-outline:hover {
        background: var(--accent);
        color: #0b1a33;
    }

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

    .btn-light:hover {
        background: var(--accent-bright);
        border-color: var(--accent-bright);
        transform: translateY(-2px);
        box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
    }

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

    .btn-primary:hover {
        background: var(--primary-light);
        transform: translateY(-2px);
        box-shadow: 0 6px 20px rgba(11, 26, 51, 0.25);
    }

    .nav-toggle {
        display: none;
        width: 42px;
        height: 38px;
        align-items: center;
        justify-content: center;
        color: #fff;
        font-size: 20px;
        cursor: pointer;
        border: 1px solid rgba(255, 255, 255, 0.2);
        border-radius: 8px;
        background: rgba(255, 255, 255, 0.08);
    }

    .header-bottom {
        background: rgba(255, 255, 255, 0.04);
    }

    .main-nav {
        display: flex;
        gap: 8px;
        padding: 10px 0;
        overflow-x: auto;
        scrollbar-width: none;
    }

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

    .nav-link {
        padding: 8px 22px;
        border-radius: 40px;
        font-weight: 600;
        font-size: 15px;
        color: rgba(255, 255, 255, 0.8);
        white-space: nowrap;
        transition: var(--transition);
        border: 1px solid transparent;
    }

    .nav-link:hover {
        color: #fff;
        background: rgba(255, 255, 255, 0.1);
    }

    .nav-link.active {
        background: var(--accent);
        color: #0b1a33;
        border-color: var(--accent);
    }

    .nav-link:focus-visible,
    .btn:focus-visible,
    .header-search button:focus-visible {
        outline: 2px solid var(--accent-bright);
        outline-offset: 2px;
    }

    /* ========== 文章 Banner ========== */
    .article-banner {
        background-size: cover;
        background-position: center;
        position: relative;
        padding: 80px 0;
        color: #fff;
    }

    .article-banner::before {
        content: "";
        position: absolute;
        inset: 0;
        background: linear-gradient(135deg, rgba(11, 26, 51, 0.85) 0%, rgba(11, 26, 51, 0.65) 100%);
    }

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

    .article-banner-inner {
        max-width: 820px;
    }

    .article-category {
        display: inline-block;
        background: var(--accent);
        color: #0b1a33;
        padding: 5px 16px;
        border-radius: 40px;
        font-size: 13px;
        font-weight: 700;
        margin-bottom: 18px;
    }

    .article-banner h1 {
        font-size: 36px;
        line-height: 1.3;
        font-weight: 800;
        margin-bottom: 20px;
        letter-spacing: 0.5px;
    }

    .article-meta {
        display: flex;
        flex-wrap: wrap;
        gap: 18px;
        font-size: 14px;
        color: rgba(255, 255, 255, 0.85);
    }

    .article-meta i {
        margin-right: 6px;
        color: var(--accent-bright);
    }

    /* ========== 正文区 ========== */
    .article-body-section {
        padding: 60px 0;
    }

    .article-grid {
        display: grid;
        grid-template-columns: minmax(0, 1fr) 340px;
        gap: 40px;
        align-items: start;
    }

    .article-main {
        background: var(--card-bg);
        border-radius: var(--radius);
        padding: 40px;
        box-shadow: var(--shadow);
    }

    .article-content {
        font-size: 16px;
        line-height: 1.85;
        color: var(--text);
    }

    .article-content p {
        margin-bottom: 20px;
    }

    .article-content h2 {
        font-size: 26px;
        font-weight: 700;
        margin-bottom: 16px;
        margin-top: 32px;
        color: var(--primary);
        position: relative;
        padding-left: 16px;
    }

    .article-content h2::before {
        content: "";
        position: absolute;
        left: 0;
        top: 6px;
        bottom: 6px;
        width: 4px;
        background: var(--accent);
        border-radius: 4px;
    }

    .article-content h3 {
        font-size: 20px;
        font-weight: 700;
        margin-bottom: 12px;
        margin-top: 24px;
        color: var(--primary);
    }

    .article-content ul,
    .article-content ol {
        margin-bottom: 20px;
        padding-left: 24px;
    }

    .article-content ul li {
        list-style: disc;
        margin-bottom: 8px;
    }

    .article-content ol li {
        list-style: decimal;
        margin-bottom: 8px;
    }

    .article-content blockquote {
        border-left: 4px solid var(--accent);
        background: rgba(201, 168, 106, 0.08);
        padding: 16px 24px;
        margin-bottom: 20px;
        border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
        color: var(--text-weak);
        font-style: italic;
    }

    .article-content img {
        border-radius: var(--radius-sm);
        margin: 24px 0;
        box-shadow: var(--shadow);
    }

    .article-content a {
        color: var(--accent-dark);
        text-decoration: underline;
        text-underline-offset: 3px;
    }

    .article-content a:hover {
        color: var(--primary);
    }

    /* 标签 */
    .article-tags {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        gap: 10px;
        padding: 20px 0;
        margin-top: 32px;
        border-top: 1px solid var(--border);
        font-size: 14px;
    }

    .article-tags span {
        color: var(--text-weak);
        font-weight: 600;
    }

    .article-tags a {
        background: var(--bg);
        padding: 6px 14px;
        border-radius: 30px;
        font-size: 13px;
        font-weight: 500;
        color: var(--text);
        transition: var(--transition);
    }

    .article-tags a:hover {
        background: var(--accent);
        color: #0b1a33;
    }

    /* 上下篇 */
    .article-pager {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 16px;
        margin-top: 28px;
    }

    .pager-link {
        display: flex;
        flex-direction: column;
        gap: 6px;
        padding: 18px 20px;
        border: 1px solid var(--border);
        border-radius: var(--radius-sm);
        transition: var(--transition);
        background: var(--bg);
    }

    .pager-link:hover {
        border-color: var(--accent);
        box-shadow: var(--shadow-hover);
        transform: translateY(-2px);
        background: var(--card-bg);
    }

    .pager-link span {
        font-size: 13px;
        color: var(--text-weak);
    }

    .pager-link strong {
        font-size: 15px;
        font-weight: 600;
        color: var(--text);
    }

    .pager-link i {
        color: var(--accent);
    }

    /* 内容未找到 */
    .not-found {
        text-align: center;
        padding: 60px 20px;
    }

    .not-found h2 {
        font-size: 28px;
        color: var(--primary);
        margin-bottom: 12px;
    }

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

    /* ========== 侧边栏 ========== */
    .article-sidebar {
        display: flex;
        flex-direction: column;
        gap: 24px;
        position: sticky;
        top: 160px;
    }

    .sidebar-card {
        background: var(--card-bg);
        border-radius: var(--radius);
        padding: 28px;
        box-shadow: var(--shadow);
        border: 1px solid var(--border);
    }

    .sidebar-card h3 {
        font-size: 18px;
        font-weight: 700;
        color: var(--primary);
        margin-bottom: 18px;
        position: relative;
        padding-bottom: 12px;
    }

    .sidebar-card h3::after {
        content: "";
        position: absolute;
        left: 0;
        bottom: 0;
        width: 40px;
        height: 3px;
        background: var(--accent);
        border-radius: 3px;
    }

    .sidebar-card img {
        border-radius: var(--radius-sm);
        margin-bottom: 16px;
        width: 100%;
        object-fit: cover;
    }

    .sidebar-card p {
        color: var(--text-weak);
        font-size: 14px;
        margin-bottom: 16px;
    }

    .sidebar-card .btn {
        width: 100%;
    }

    .sidebar-list li {
        padding: 12px 0;
        border-bottom: 1px solid var(--border);
        display: flex;
        flex-direction: column;
        gap: 4px;
    }

    .sidebar-list li:last-child {
        border-bottom: none;
        padding-bottom: 0;
    }

    .sidebar-list a {
        font-weight: 600;
        font-size: 14px;
        line-height: 1.5;
        color: var(--text);
    }

    .sidebar-list a:hover {
        color: var(--accent-dark);
    }

    .sidebar-list span {
        font-size: 12px;
        color: var(--text-weak);
    }

    /* ========== 相关推荐 ========== */
    .related-section {
        padding: 60px 0;
        background: var(--bg);
    }

    .section-head {
        text-align: center;
        margin-bottom: 40px;
    }

    .section-head h2 {
        font-size: 30px;
        font-weight: 800;
        color: var(--primary);
        margin-bottom: 8px;
    }

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

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

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

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

    .related-card img {
        width: 100%;
        height: 200px;
        object-fit: cover;
        transition: transform 0.4s ease;
    }

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

    .related-card-body {
        padding: 22px;
        flex: 1;
    }

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

    .related-card-body p {
        color: var(--text-weak);
        font-size: 14px;
        line-height: 1.6;
    }

    /* ========== CTA ========== */
    .cta-section {
        padding: 60px 0;
    }

    .cta-box {
        background-size: cover;
        background-position: center;
        border-radius: var(--radius);
        padding: 60px;
        color: #fff;
        text-align: center;
        position: relative;
    }

    .cta-box::before {
        content: "";
        position: absolute;
        inset: 0;
        background: linear-gradient(120deg, rgba(11, 26, 51, 0.85), rgba(11, 26, 51, 0.6));
        border-radius: var(--radius);
    }

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

    .cta-box h2 {
        font-size: 30px;
        font-weight: 800;
        margin-bottom: 12px;
    }

    .cta-box p {
        font-size: 16px;
        color: rgba(255, 255, 255, 0.85);
        margin-bottom: 24px;
    }

    /* ========== FAQ ========== */
    .faq-section {
        padding: 60px 0;
        background: var(--card-bg);
    }

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

    .faq-item {
        background: var(--bg);
        border-radius: var(--radius);
        padding: 28px;
        border: 1px solid var(--border);
        transition: var(--transition);
    }

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

    .faq-item h3 {
        font-size: 16px;
        font-weight: 700;
        color: var(--primary);
        margin-bottom: 12px;
        display: flex;
        gap: 10px;
        align-items: flex-start;
    }

    .faq-item h3::before {
        content: "\f059";
        font-family: "Font Awesome 6 Free";
        font-weight: 900;
        color: var(--accent);
        font-size: 18px;
        flex-shrink: 0;
    }

    .faq-item p {
        font-size: 14px;
        color: var(--text-weak);
        line-height: 1.7;
    }

    /* ========== Footer ========== */
    .site-footer {
        background: var(--primary);
        color: rgba(255, 255, 255, 0.75);
        padding: 60px 0 0;
        margin-top: 60px;
    }

    .footer-grid {
        display: grid;
        grid-template-columns: 1.5fr 1fr 1fr;
        gap: 40px;
        padding-bottom: 40px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

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

    .footer-brand p {
        font-size: 14px;
        line-height: 1.7;
        max-width: 360px;
    }

    .footer-col h4 {
        font-size: 16px;
        font-weight: 700;
        color: #fff;
        margin-bottom: 16px;
        position: relative;
        padding-bottom: 10px;
    }

    .footer-col h4::after {
        content: "";
        position: absolute;
        left: 0;
        bottom: 0;
        width: 28px;
        height: 3px;
        background: var(--accent);
        border-radius: 3px;
    }

    .footer-col ul li {
        margin-bottom: 10px;
    }

    .footer-col ul a {
        color: rgba(255, 255, 255, 0.7);
        font-size: 14px;
        display: inline-flex;
        align-items: center;
        gap: 8px;
        transition: var(--transition);
    }

    .footer-col ul a:hover {
        color: var(--accent-bright);
        padding-left: 4px;
    }

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

    .footer-bottom {
        padding: 20px 0;
        text-align: center;
        font-size: 14px;
        color: rgba(255, 255, 255, 0.5);
        border-top: 1px solid rgba(255, 255, 255, 0.08);
    }

    /* ========== 响应式 ========== */
    @media (max-width: 1024px) {
        .article-grid {
            grid-template-columns: 1fr;
        }

        .article-sidebar {
            position: static;
            flex-direction: row;
            flex-wrap: wrap;
            gap: 20px;
        }

        .sidebar-card {
            flex: 1 1 280px;
        }

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

        .faq-grid {
            grid-template-columns: 1fr;
            max-width: 720px;
            margin: 0 auto;
        }
    }

    @media (max-width: 768px) {
        .header-top-inner {
            height: 60px;
        }

        .header-search {
            display: none;
        }

        .nav-toggle {
            display: inline-flex;
        }

        .header-bottom {
            position: absolute;
            top: 100%;
            left: 0;
            right: 0;
            background: var(--primary);
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }

        .header-bottom.open {
            max-height: 240px;
        }

        .main-nav {
            flex-direction: column;
            padding: 12px 24px;
            gap: 6px;
        }

        .nav-link {
            padding: 12px 16px;
            border-radius: 10px;
        }

        .article-banner {
            padding: 50px 0;
        }

        .article-banner h1 {
            font-size: 28px;
        }

        .article-main {
            padding: 24px;
        }

        .article-pager {
            grid-template-columns: 1fr;
        }

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

        .cta-box {
            padding: 40px 24px;
        }

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

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

        .logo {
            font-size: 17px;
        }

        .logo i {
            font-size: 18px;
        }

        .article-banner h1 {
            font-size: 23px;
        }

        .article-meta {
            flex-direction: column;
            gap: 6px;
        }

        .article-body-section {
            padding: 36px 0;
        }

        .article-content {
            font-size: 15px;
        }

        .article-content h2 {
            font-size: 21px;
        }

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

        .faq-item {
            padding: 22px;
        }
    }

/* roulang page: category1 */
:root{
  --primary:#e85a1e;
  --primary-2:#d14a12;
  --primary-soft:#fff1e8;
  --secondary:#0d2a4a;
  --secondary-soft:#eaf1f8;
  --ink:#1c242f;
  --muted:#6b7280;
  --bg:#f6f4f0;
  --card:#ffffff;
  --line:#e9e4dd;
  --white:#ffffff;
  --radius:18px;
  --radius-sm:10px;
  --shadow:0 14px 40px rgba(21,35,52,.08);
  --shadow-sm:0 4px 16px rgba(21,35,52,.06);
  --space:84px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  background:var(--bg);
  color:var(--ink);
  line-height:1.7;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}
input,button{outline:none}
:focus-visible{outline:3px solid rgba(232,90,30,.35);outline-offset:2px;border-radius:4px}
.container{width:min(1180px,92%);margin:0 auto}
.section{padding:var(--space) 0}
.section-head{max-width:760px;margin:0 auto 48px;text-align:center}
.section-tag{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;
  color:var(--primary);background:var(--primary-soft);
  padding:6px 16px;border-radius:30px;letter-spacing:.5px;margin-bottom:14px;
}
.section-title{font-size:34px;line-height:1.3;font-weight:800;color:var(--ink);letter-spacing:-.5px}
.section-desc{margin-top:14px;color:var(--muted);font-size:16px;line-height:1.8}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  font-size:15px;font-weight:600;line-height:1;padding:14px 28px;border-radius:50px;
  border:1px solid transparent;cursor:pointer;text-align:center;
  transition:all .25s ease;white-space:nowrap;
}
.btn i{font-size:14px}
.btn-primary{background:linear-gradient(135deg,var(--primary),#ff8a5c);color:#fff;box-shadow:0 8px 22px rgba(232,90,30,.28)}
.btn-primary:hover{background:linear-gradient(135deg,var(--primary-2),var(--primary));transform:translateY(-2px);box-shadow:0 12px 28px rgba(232,90,30,.34)}
.btn-outline{border-color:rgba(255,255,255,.65);color:#fff;background:rgba(255,255,255,.06);backdrop-filter:blur(6px)}
.btn-outline:hover{border-color:#fff;background:rgba(255,255,255,.14)}
.btn-accent{background:linear-gradient(135deg,var(--primary),#ff8a5c);color:#fff;box-shadow:0 6px 18px rgba(232,90,30,.26)}
.btn-accent:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(232,90,30,.32)}
.btn-neutral{background:var(--white);color:var(--ink);border-color:var(--line);box-shadow:0 2px 10px rgba(0,0,0,.03)}
.btn-neutral:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px)}
.btn-sm{padding:10px 20px;font-size:14px}

.site-header{
  position:sticky;top:0;z-index:999;
  background:rgba(255,255,255,.96);
  backdrop-filter:blur(12px);
  box-shadow:0 2px 20px rgba(13,42,74,.07);
  border-bottom:1px solid var(--line);
}
.header-top{border-bottom:1px solid #f1ede8;background:#fff}
.header-top-inner{display:flex;align-items:center;justify-content:space-between;min-height:64px}
.logo{display:inline-flex;align-items:center;gap:10px;font-size:22px;font-weight:800;color:var(--ink);letter-spacing:-.5px}
.logo i{color:var(--primary);font-size:24px}
.header-tools{display:flex;align-items:center;gap:14px}
.header-search{
  display:flex;align-items:center;gap:0;
  background:#f4f1ed;border:1px solid var(--line);border-radius:50px;
  padding:4px 4px 4px 16px;width:240px;
}
.header-search input{
  flex:1;min-width:0;border:none;background:transparent;
  font-size:14px;color:var(--ink);padding:8px 0;
}
.header-search input::placeholder{color:#a0a7b0}
.header-search button{
  width:34px;height:34px;border-radius:50%;
  background:var(--primary);color:#fff;display:flex;
  align-items:center;justify-content:center;
  transition:background .2s;
}
.header-search button:hover{background:var(--primary-2)}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:12px;
  background:var(--primary-soft);color:var(--primary);font-size:20px;
  align-items:center;justify-content:center;
  transition:all .2s;
}
.nav-toggle:hover{background:var(--primary);color:#fff}
.header-bottom{background:#fff}
.main-nav{display:flex;align-items:center;gap:28px;overflow-x:auto;scrollbar-width:none;padding:0}
.main-nav::-webkit-scrollbar{display:none}
.nav-link{
  position:relative;display:inline-flex;align-items:center;gap:8px;
  padding:16px 2px;font-size:15px;font-weight:600;color:var(--muted);
  white-space:nowrap;transition:color .2s;
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;width:100%;height:3px;
  border-radius:3px 3px 0 0;background:linear-gradient(90deg,var(--primary),#ff8a5c);
  transform:scaleX(0);transform-origin:left;transition:transform .3s ease;
}
.nav-link:hover{color:var(--primary)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--primary)}
.nav-link.active::after{transform:scaleX(1)}

.page-hero{
  position:relative;padding:110px 0;
  background-size:cover;background-position:center;
  isolation:isolate;
}
.page-hero::before{
  content:"";position:absolute;inset:0;z-index:-1;
  background:linear-gradient(135deg,rgba(10,32,55,.92) 0%,rgba(13,42,74,.82) 42%,rgba(232,90,30,.68) 100%);
}
.page-hero .container{position:relative;z-index:1;text-align:center}
.hero-badge{
  display:inline-flex;align-items:center;gap:10px;
  background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.25);
  color:#fff;font-size:13px;font-weight:600;letter-spacing:1px;
  padding:8px 20px;border-radius:50px;margin-bottom:22px;
  backdrop-filter:blur(6px);
}
.hero-badge i{color:#ffc09e}
.page-hero h1{
  font-size:46px;line-height:1.25;font-weight:800;
  color:#fff;letter-spacing:-1px;
  max-width:860px;margin:0 auto 18px;
  text-shadow:0 4px 30px rgba(0,0,0,.2);
}
.page-hero p{
  max-width:720px;margin:0 auto 34px;
  color:rgba(255,255,255,.9);font-size:17px;line-height:1.8;
}
.hero-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.hero-actions .btn{min-width:150px}

.about-split{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.about-media{position:relative}
.about-media img{
  width:100%;border-radius:var(--radius);object-fit:cover;
  box-shadow:var(--shadow);
}
.about-media::after{
  content:"";position:absolute;inset:18px -18px -18px 18px;
  border-radius:var(--radius);border:2px solid var(--primary);
  z-index:-1;opacity:.4;
}
.about-float-card{
  position:absolute;bottom:20px;left:-20px;
  background:rgba(255,255,255,.96);backdrop-filter:blur(8px);
  border-radius:14px;padding:16px 20px;
  box-shadow:var(--shadow);
  display:flex;align-items:center;gap:12px;
}
.about-float-card i{
  width:42px;height:42px;border-radius:12px;background:var(--primary-soft);
  color:var(--primary);display:flex;align-items:center;justify-content:center;
  font-size:18px;
}
.about-float-card strong{display:block;font-size:14px;color:var(--ink)}
.about-float-card span{font-size:12px;color:var(--muted)}
.about-content .section-title{margin-bottom:16px}
.about-content p{color:var(--muted);font-size:15px;line-height:1.9;margin-bottom:16px}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:36px}
.stat-card{
  background:var(--card);border:1px solid var(--line);border-radius:16px;
  padding:22px 16px;text-align:center;transition:all .25s ease;
}
.stat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-sm)}
.stat-card i{font-size:22px;color:var(--primary);margin-bottom:10px;display:inline-block}
.stat-card strong{
  display:block;font-size:13px;font-weight:700;color:var(--ink);line-height:1.5;
}
.stat-card span{font-size:12px;color:var(--muted);line-height:1.5;display:block;margin-top:4px}

.timeline-block{position:relative;max-width:900px;margin:0 auto;padding-left:40px}
.timeline-block::before{
  content:"";position:absolute;left:10px;top:10px;bottom:10px;
  width:3px;border-radius:3px;background:linear-gradient(180deg,var(--primary),#ffcaa8);
}
.timeline-item{
  position:relative;margin-bottom:28px;background:var(--card);
  border:1px solid var(--line);border-radius:var(--radius);
  padding:28px 32px;transition:all .25s ease;
}
.timeline-item:hover{box-shadow:var(--shadow-sm);border-color:#f0c5ad}
.timeline-item::before{
  content:"";position:absolute;left:-37px;top:38px;
  width:14px;height:14px;border-radius:50%;
  background:var(--primary);border:4px solid #fff;
  box-shadow:0 0 0 2px var(--primary);
}
.timeline-item .time-dot{
  display:inline-block;font-size:12px;font-weight:700;color:var(--primary);
  background:var(--primary-soft);border-radius:30px;padding:4px 14px;margin-bottom:10px;
}
.timeline-item h3{font-size:19px;font-weight:700;margin-bottom:6px}
.timeline-item p{color:var(--muted);font-size:14px;line-height:1.8}

.cards-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.service-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:32px 26px;transition:all .3s ease;position:relative;overflow:hidden;
}
.service-card::before{
  content:"";position:absolute;left:0;top:0;width:100%;height:4px;
  background:linear-gradient(90deg,var(--primary),#ffb28f);
  transform:scaleX(0);transform-origin:left;transition:transform .35s ease;
}
.service-card:hover{transform:translateY(-8px);box-shadow:var(--shadow)}
.service-card:hover::before{transform:scaleX(1)}
.service-card .icon{
  width:54px;height:54px;border-radius:14px;
  background:linear-gradient(135deg,var(--primary),#ff8a5c);
  color:#fff;display:flex;align-items:center;justify-content:center;
  font-size:20px;margin-bottom:22px;box-shadow:0 8px 20px rgba(232,90,30,.25);
}
.service-card h3{font-size:18px;font-weight:700;margin-bottom:10px}
.service-card p{color:var(--muted);font-size:14px;line-height:1.8}

.steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:step}
.step-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:32px 26px;position:relative;transition:all .3s ease;
}
.step-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-sm)}
.step-card .step-num{
  counter-increment:step;
  font-size:42px;font-weight:800;line-height:1;
  background:linear-gradient(135deg,var(--primary),#ff8a5c);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  margin-bottom:16px;
}
.step-card .step-num::after{content:counter(step)}
.step-card h3{font-size:17px;font-weight:700;margin-bottom:8px}
.step-card p{color:var(--muted);font-size:14px;line-height:1.75}

.standard-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.standard-item{
  background:var(--card);border:1px solid var(--line);border-radius:16px;
  padding:26px 28px;display:flex;gap:16px;align-items:flex-start;
  transition:all .25s ease;
}
.standard-item:hover{box-shadow:var(--shadow-sm);border-color:#f0c5ad}
.standard-item i{
  flex-shrink:0;width:34px;height:34px;border-radius:10px;
  background:var(--primary-soft);color:var(--primary);
  display:flex;align-items:center;justify-content:center;font-size:15px;
}
.standard-item h3{font-size:16px;font-weight:700;margin-bottom:4px}
.standard-item p{color:var(--muted);font-size:14px;line-height:1.7}

.faq-list{max-width:860px;margin:0 auto}
.faq-item{
  background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius);margin-bottom:16px;overflow:hidden;
  transition:border-color .25s,box-shadow .25s;
}
.faq-item:hover{border-color:#f0c5ad}
.faq-item[open]{box-shadow:var(--shadow-sm);border-color:#f0c5ad}
.faq-item summary{
  cursor:pointer;padding:22px 26px;
  font-size:16px;font-weight:600;color:var(--ink);
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  list-style:none;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .faq-arrow{color:var(--primary);transition:transform .3s}
.faq-item[open] summary .faq-arrow{transform:rotate(180deg)}
.faq-item[open] summary{color:var(--primary)}
.faq-answer{padding:0 26px 24px;color:var(--muted);font-size:15px;line-height:1.85;border-top:1px dashed var(--line);margin:0 26px 0}

.cta-block{
  background:linear-gradient(135deg,var(--secondary),#153c68 55%,#1b4b7e);
  border-radius:24px;padding:52px 56px;color:#fff;
  display:flex;align-items:center;justify-content:space-between;gap:36px;flex-wrap:wrap;
  position:relative;overflow:hidden;
}
.cta-block::before{
  content:"\f105";font-family:"Font Awesome 6 Free";font-weight:900;
  position:absolute;right:-20px;bottom:-40px;font-size:200px;color:rgba(255,255,255,.05);
}
.cta-block h2{font-size:28px;font-weight:800;margin-bottom:12px}
.cta-block p{color:rgba(255,255,255,.8);font-size:15px;max-width:600px;line-height:1.8}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

.site-footer{background:#0b1826;color:#9aa8b7;padding:64px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:48px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.08)}
.footer-brand .logo{color:#fff;margin-bottom:16px}
.footer-brand p{font-size:14px;line-height:1.85;max-width:360px}
.footer-col h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:18px}
.footer-col ul li{margin-bottom:12px}
.footer-col ul a{
  color:#9aa8b7;font-size:14px;display:inline-flex;align-items:center;gap:8px;
  transition:color .2s;
}
.footer-col ul a i{font-size:12px;color:#5f7489}
.footer-col ul a:hover{color:#fff}
.footer-bottom{
  padding:24px 0;text-align:center;font-size:13px;color:#7b8a99;
}

@media(max-width:1024px){
  :root{--space:64px}
  .cards-grid,.steps-grid{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .section-title{font-size:28px}
  .page-hero h1{font-size:38px}
  .cta-block{padding:40px 32px}
}
@media(max-width:768px){
  .header-tools .header-search{display:none}
  .nav-toggle{display:flex}
  .header-bottom{position:relative}
  .main-nav{
    display:none;flex-direction:column;align-items:stretch;
    background:#fff;border-top:1px solid var(--line);
    padding:8px 16px 14px;gap:4px;
  }
  .main-nav.open{display:flex}
  .nav-link{padding:14px 8px;border-radius:10px}
  .nav-link::after{display:none}
  .nav-link.active{background:var(--primary-soft)}
  .page-hero{padding:72px 0}
  .page-hero h1{font-size:30px}
  .page-hero p{font-size:15px}
  .about-split{grid-template-columns:1fr}
  .about-float-card{left:10px}
  .standard-grid{grid-template-columns:1fr}
  .timeline-block{padding-left:28px}
  .timeline-item{padding:22px 20px}
  .timeline-item::before{left:-25px}
  .cta-block{flex-direction:column;align-items:flex-start}
  .footer-grid{grid-template-columns:1fr}
}
@media(max-width:520px){
  :root{--space:48px}
  .cards-grid,.steps-grid,.stats-grid{grid-template-columns:1fr}
  .hero-actions{flex-direction:column;width:100%}
  .hero-actions .btn{width:100%}
  .btn{width:100%}
  .header-top-inner{min-height:58px}
  .logo{font-size:18px}
  .logo i{font-size:20px}
  .btn-sm{width:auto}
  .about-float-card{position:static;margin-top:14px}
  .section-title{font-size:24px}
  .page-hero h1{font-size:26px;letter-spacing:0}
  .faq-item summary{font-size:15px;padding:18px 18px}
  .faq-answer{padding:0 18px 18px;font-size:14px}
  .timeline-item h3{font-size:17px}
}