/* roulang page: index */
:root {
    --primary: #0e2a47;
    --primary-light: #1b3a5f;
    --accent: #c9a24e;
    --accent-light: #dbb76a;
    --bg-light: #f7f5f1;
    --bg-white: #ffffff;
    --text-dark: #1a2433;
    --text-gray: #5b6472;
    --border: #e5e1d8;
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 10px;
    --shadow-sm: 0 2px 8px rgba(14, 42, 71, 0.06);
    --shadow-md: 0 8px 30px rgba(14, 42, 71, 0.1);
    --shadow-lg: 0 20px 60px rgba(14, 42, 71, 0.16);
  }

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

  html { scroll-behavior: smooth; }

  body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
    background: var(--bg-light);
    color: var(--text-dark);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
  }

  img { max-width: 100%; display: block; }
  a { text-decoration: none; color: inherit; transition: color 0.3s ease; }
  button { border: none; background: none; cursor: pointer; }
  input, textarea { outline: none; }

  .container { max-width: 1200px; margin: 0 auto; padding-left: 1.25rem; padding-right: 1.25rem; }

  .site-header {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(229, 225, 216, 0.7);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    transition: box-shadow 0.3s ease;
  }
  .site-header.scrolled { box-shadow: var(--shadow-md); }

  .nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-gray);
    padding: 0.4rem 0.2rem;
    position: relative;
    transition: color 0.3s ease;
  }
  .nav-link:hover { color: var(--primary); }
  .nav-link::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 0;
    height: 2px;
    background: var(--accent);
    border-radius: 2px;
    transition: width 0.3s ease;
  }
  .nav-link:hover::after, .nav-link.active::after { width: 100%; }
  .nav-link.active { color: var(--primary); font-weight: 600; }

  .btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--accent);
    color: #fff;
    font-weight: 600;
    font-size: 0.95rem;
    padding: 0.75rem 1.75rem;
    border-radius: 50px;
    box-shadow: 0 4px 15px rgba(201, 162, 78, 0.35);
    transition: all 0.3s ease;
  }
  .btn-primary:hover {
    background: var(--accent-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(201, 162, 78, 0.45);
  }
  .btn-primary:active { transform: translateY(0); }
  .btn-primary:focus-visible { outline: 3px solid rgba(201, 162, 78, 0.5); outline-offset: 2px; }

  .btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    border: 1.5px solid rgba(255, 255, 255, 0.6);
    color: #fff;
    font-weight: 600;
    font-size: 0.95rem;
    padding: 0.7rem 1.75rem;
    border-radius: 50px;
    backdrop-filter: blur(4px);
    transition: all 0.3s ease;
  }
  .btn-outline:hover { background: rgba(255, 255, 255, 0.15); border-color: #fff; transform: translateY(-2px); }

  .btn-dark {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--primary);
    color: #fff;
    font-weight: 600;
    font-size: 0.95rem;
    padding: 0.75rem 1.75rem;
    border-radius: 50px;
    transition: all 0.3s ease;
  }
  .btn-dark:hover { background: var(--primary-light); transform: translateY(-2px); box-shadow: var(--shadow-md); }

  .badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.8rem;
    font-weight: 600;
    padding: 0.35rem 1rem;
    border-radius: 50px;
    background: rgba(201, 162, 78, 0.12);
    color: var(--accent);
    letter-spacing: 0.02em;
  }

  .section-label {
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--accent);
  }

  .section-title {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1.3;
    color: var(--text-dark);
    margin-top: 0.75rem;
  }
  @media (max-width: 768px) {
    .section-title { font-size: 1.6rem; }
  }

  .section-desc {
    font-size: 1rem;
    color: var(--text-gray);
    margin-top: 1rem;
    max-width: 620px;
    margin-left: auto;
    margin-right: auto;
  }

  .card {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    border: 1px solid rgba(229, 225, 216, 0.8);
    box-shadow: var(--shadow-sm);
    transition: all 0.35s ease;
  }
  .card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
    border-color: rgba(201, 162, 78, 0.3);
  }

  .icon-box {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary);
    color: #fff;
    font-size: 1.3rem;
    transition: all 0.3s ease;
  }
  .card:hover .icon-box { background: var(--accent); }

  .hero {
    min-height: 92vh;
    display: flex;
    align-items: center;
    background-size: cover;
    background-position: center;
    position: relative;
  }
  .hero .overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(100deg, rgba(14, 42, 71, 0.92) 0%, rgba(14, 42, 71, 0.72) 50%, rgba(14, 42, 71, 0.35) 100%);
  }
  .hero .overlay-bottom {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(14, 42, 71, 0.5), transparent 40%);
  }

  .stat-block {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.12);
    backdrop-filter: blur(8px);
    border-radius: var(--radius-md);
    padding: 1.75rem 1.5rem;
    text-align: center;
    transition: all 0.3s ease;
  }
  .stat-block:hover { background: rgba(255, 255, 255, 0.12); transform: translateY(-4px); }

  .step-card {
    position: relative;
    padding: 2rem 1.5rem 1.5rem;
    background: var(--bg-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(229, 225, 216, 0.8);
    transition: all 0.35s ease;
  }
  .step-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
  .step-num {
    position: absolute;
    top: 1rem;
    right: 1.25rem;
    font-size: 2.6rem;
    font-weight: 800;
    color: rgba(14, 42, 71, 0.08);
    line-height: 1;
  }

  .faq-item {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    border: 1px solid rgba(229, 225, 216, 0.8);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: box-shadow 0.3s ease;
  }
  .faq-item:hover { box-shadow: var(--shadow-md); }
  .faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 1.5rem;
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-dark);
    text-align: left;
    transition: color 0.3s ease;
  }
  .faq-question:hover { color: var(--accent); }
  .faq-icon { transition: transform 0.3s ease; color: var(--accent); }
  .faq-item.open .faq-icon { transform: rotate(180deg); }
  .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.3s ease;
    padding: 0 1.5rem;
    color: var(--text-gray);
    font-size: 0.95rem;
    line-height: 1.8;
  }
  .faq-item.open .faq-answer { max-height: 400px; padding-bottom: 1.5rem; }

  .footer-link {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
    transition: color 0.3s ease, padding-left 0.3s ease;
    display: inline-block;
    padding: 0.25rem 0;
  }
  .footer-link:hover { color: var(--accent-light); padding-left: 4px; }

  .cta-section {
    background-size: cover;
    background-position: center;
    position: relative;
  }
  .cta-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(100deg, rgba(14, 42, 71, 0.94), rgba(14, 42, 71, 0.75));
  }

  .mobile-menu { transition: all 0.3s ease; }
  .mobile-menu-link { padding: 0.75rem 1rem; font-size: 1rem; font-weight: 500; color: var(--text-dark); border-radius: 10px; transition: background 0.3s; }
  .mobile-menu-link:hover { background: rgba(14, 42, 71, 0.06); }
  .mobile-menu-link.active { background: rgba(201, 162, 78, 0.12); color: var(--primary); font-weight: 600; }

  .line-clamp-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  @media (max-width: 768px) {
    .hero { min-height: 80vh; }
    .step-card { padding: 1.5rem 1rem 1.25rem; }
  }

/* roulang page: category1 */
:root {
            --primary: #0B1E3A;
            --primary-light: #12294D;
            --accent: #D4A853;
            --accent-light: #E8C37B;
            --bg-light: #F7F8FA;
            --text-dark: #1E293B;
            --text-muted: #64748B;
            --border-color: #E2E8F0;
            --radius-md: 12px;
            --radius-lg: 20px;
            --container-max: 1280px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, system-ui, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
            line-height: 1.6;
            background: #ffffff;
            color: var(--text-dark);
            -webkit-font-smoothing: antialiased;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        img {
            display: block;
            max-width: 100%;
            height: auto;
        }
        .container {
            max-width: var(--container-max);
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
            width: 100%;
        }
        /* ===== Header/Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(11, 30, 58, 0.96);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            transition: background 0.3s;
        }
        .site-header .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 76px;
        }
        .nav-link {
            font-size: 0.95rem;
            font-weight: 500;
            color: rgba(226, 232, 240, 0.85);
            padding: 0.5rem 0.25rem;
            border-bottom: 2px solid transparent;
            transition: color 0.25s, border-color 0.25s;
            white-space: nowrap;
        }
        .nav-link:hover {
            color: #ffffff;
        }
        .nav-link.active {
            color: #E8C37B;
            border-bottom-color: #D4A853;
        }
        .btn-header {
            background: linear-gradient(135deg, #D4A853, #B8913E);
            color: #0B1E3A;
            font-weight: 600;
            font-size: 0.9rem;
            padding: 0.55rem 1.4rem;
            border-radius: 9999px;
            transition: transform 0.25s, box-shadow 0.25s, filter 0.25s;
            box-shadow: 0 4px 18px rgba(212, 168, 83, 0.3);
        }
        .btn-header:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(212, 168, 83, 0.42);
            filter: brightness(1.05);
        }
        .mobile-menu {
            display: none;
            background: #0B1E3A;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }
        .mobile-menu.open {
            display: block;
        }
        .mobile-menu a {
            display: block;
            padding: 0.9rem 1.5rem;
            color: rgba(226, 232, 240, 0.88);
            font-size: 1rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            transition: background 0.2s, color 0.2s;
        }
        .mobile-menu a:hover {
            background: rgba(255, 255, 255, 0.05);
            color: #E8C37B;
        }
        .mobile-menu a.active {
            color: #E8C37B;
            background: rgba(212, 168, 83, 0.08);
        }
        @media (max-width: 767px) {
            .desktop-nav {
                display: none;
            }
            .mobile-toggle {
                display: flex;
            }
        }
        @media (min-width: 768px) {
            .mobile-toggle {
                display: none;
            }
        }
        /* ===== Banner ===== */
        .page-banner {
            position: relative;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            padding: 6.5rem 0;
            min-height: 460px;
            display: flex;
            align-items: center;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(7, 18, 36, 0.9) 30%, rgba(7, 18, 36, 0.68) 60%, rgba(7, 18, 36, 0.42));
        }
        .banner-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: rgba(212, 168, 83, 0.16);
            border: 1px solid rgba(212, 168, 83, 0.38);
            color: #E8C37B;
            font-size: 0.82rem;
            font-weight: 600;
            padding: 0.35rem 1rem;
            border-radius: 9999px;
            letter-spacing: 0.05em;
        }
        .banner-title {
            font-size: clamp(2rem, 4.5vw, 3.5rem);
            font-weight: 800;
            line-height: 1.18;
            color: #ffffff;
            letter-spacing: -0.02em;
        }
        .banner-subtitle {
            font-size: 1.08rem;
            color: rgba(226, 232, 240, 0.92);
            max-width: 660px;
            line-height: 1.8;
        }
        .banner-stat {
            background: rgba(255, 255, 255, 0.07);
            border: 1px solid rgba(255, 255, 255, 0.14);
            backdrop-filter: blur(8px);
            border-radius: 16px;
            padding: 1.1rem 1.5rem;
            text-align: center;
            transition: border-color 0.3s, background 0.3s;
        }
        .banner-stat:hover {
            border-color: rgba(212, 168, 83, 0.5);
            background: rgba(255, 255, 255, 0.11);
        }
        .banner-stat .num {
            font-size: 1.7rem;
            font-weight: 800;
            color: #E8C37B;
            line-height: 1.2;
        }
        .banner-stat .label {
            font-size: 0.82rem;
            color: rgba(226, 232, 240, 0.7);
            margin-top: 0.1rem;
        }
        /* ===== Section headers ===== */
        .section-head {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 3.2rem;
        }
        .section-eyebrow {
            display: inline-block;
            color: #B8913E;
            font-size: 0.82rem;
            font-weight: 700;
            letter-spacing: 0.12em;
            text-transform: uppercase;
            margin-bottom: 0.7rem;
        }
        .section-title {
            font-size: clamp(1.7rem, 3vw, 2.5rem);
            font-weight: 800;
            color: #0B1E3A;
            line-height: 1.3;
            letter-spacing: -0.01em;
        }
        .section-desc {
            font-size: 1.02rem;
            color: #64748B;
            line-height: 1.8;
            margin-top: 0.9rem;
        }
        /* ===== Cards ===== */
        .service-card {
            background: #ffffff;
            border: 1px solid #E8ECF2;
            border-radius: 18px;
            padding: 2rem 1.6rem;
            box-shadow: 0 2px 20px rgba(11, 30, 58, 0.05);
            transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
        }
        .service-card:hover {
            transform: translateY(-6px);
            box-shadow: 0 14px 40px rgba(11, 30, 58, 0.11);
            border-color: rgba(212, 168, 83, 0.5);
        }
        .service-icon {
            width: 3.4rem;
            height: 3.4rem;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: #0B1E3A;
            background: linear-gradient(135deg, #F0E3C8, #D4A853);
            transition: transform 0.3s;
        }
        .service-card:hover .service-icon {
            transform: scale(1.06) rotate(-3deg);
        }
        .service-card h3 {
            font-size: 1.18rem;
            font-weight: 700;
            color: #0B1E3A;
            margin-top: 1.2rem;
        }
        .service-card p {
            font-size: 0.92rem;
            color: #64748B;
            line-height: 1.7;
            margin-top: 0.5rem;
        }
        .service-link {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 0.9rem;
            font-weight: 600;
            color: #B8913E;
            margin-top: 1.1rem;
            transition: gap 0.25s, color 0.25s;
        }
        .service-link:hover {
            color: #0B1E3A;
            gap: 0.7rem;
        }
        /* ===== Step timeline ===== */
        .step-item {
            position: relative;
            text-align: center;
            padding: 0 1rem;
        }
        .step-number {
            width: 3.5rem;
            height: 3.5rem;
            border-radius: 50%;
            background: #0B1E3A;
            color: #E8C37B;
            font-size: 1.25rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.1rem;
            box-shadow: 0 6px 20px rgba(11, 30, 58, 0.25);
            position: relative;
            z-index: 2;
        }
        .step-item::after {
            content: '';
            position: absolute;
            top: 1.75rem;
            left: 60%;
            width: 80%;
            height: 2px;
            background: linear-gradient(90deg, #D4A853, rgba(212, 168, 83, 0.15));
            z-index: 1;
        }
        .step-item:last-child::after {
            display: none;
        }
        .step-item h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: #0B1E3A;
        }
        .step-item p {
            font-size: 0.88rem;
            color: #64748B;
            line-height: 1.7;
            margin-top: 0.35rem;
        }
        @media (max-width: 767px) {
            .step-item::after {
                display: none;
            }
        }
        /* ===== Benefit section ===== */
        .benefit-media {
            border-radius: 20px;
            overflow: hidden;
            box-shadow: 0 16px 48px rgba(11, 30, 58, 0.18);
            position: relative;
        }
        .benefit-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .benefit-tag {
            display: inline-block;
            background: rgba(212, 168, 83, 0.14);
            color: #B8913E;
            font-size: 0.72rem;
            font-weight: 700;
            padding: 0.22rem 0.7rem;
            border-radius: 9999px;
            letter-spacing: 0.06em;
            text-transform: uppercase;
        }
        .benefit-list li {
            display: flex;
            align-items: flex-start;
            gap: 0.6rem;
            font-size: 0.95rem;
            color: #334155;
            padding: 0.42rem 0;
        }
        .benefit-list i {
            color: #D4A853;
            margin-top: 0.22rem;
            font-size: 0.85rem;
        }
        /* ===== Article cards ===== */
        .article-card {
            background: #ffffff;
            border: 1px solid #E8ECF2;
            border-radius: 18px;
            overflow: hidden;
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .article-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 14px 44px rgba(11, 30, 58, 0.12);
        }
        .article-card .thumb {
            height: 180px;
            overflow: hidden;
        }
        .article-card .thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s;
        }
        .article-card:hover .thumb img {
            transform: scale(1.04);
        }
        .article-card .badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(11, 30, 58, 0.85);
            color: #E8C37B;
            font-size: 0.72rem;
            font-weight: 600;
            padding: 0.22rem 0.7rem;
            border-radius: 9999px;
            backdrop-filter: blur(4px);
        }
        .article-card h3 {
            font-size: 1.04rem;
            font-weight: 700;
            color: #0B1E3A;
            line-height: 1.45;
            transition: color 0.2s;
        }
        .article-card:hover h3 {
            color: #B8913E;
        }
        .article-card p {
            font-size: 0.88rem;
            color: #64748B;
            line-height: 1.7;
            margin-top: 0.4rem;
        }
        .article-meta {
            font-size: 0.78rem;
            color: #94A3B8;
            margin-top: 0.8rem;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .article-meta i {
            font-size: 0.7rem;
        }
        /* ===== FAQ ===== */
        .faq-item {
            border: 1px solid #E8ECF2;
            border-radius: 14px;
            background: #fff;
            padding: 0;
            transition: border-color 0.3s, box-shadow 0.3s;
        }
        .faq-item:hover {
            border-color: rgba(212, 168, 83, 0.5);
            box-shadow: 0 6px 24px rgba(11, 30, 58, 0.07);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1.2rem 1.4rem;
            cursor: pointer;
            font-size: 1rem;
            font-weight: 600;
            color: #0B1E3A;
            gap: 1rem;
        }
        .faq-question .icon {
            color: #D4A853;
            transition: transform 0.3s;
            flex-shrink: 0;
        }
        .faq-item.open .faq-question .icon {
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
            padding: 0 1.4rem;
            color: #64748B;
            font-size: 0.92rem;
            line-height: 1.75;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding-bottom: 1.2rem;
        }
        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #0B1E3A 0%, #102A4E 60%, #16355E 100%);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            width: 360px;
            height: 360px;
            background: radial-gradient(circle, rgba(212, 168, 83, 0.22) 0%, transparent 70%);
            top: -80px;
            right: -60px;
            border-radius: 50%;
        }
        .cta-section::after {
            content: '';
            position: absolute;
            width: 260px;
            height: 260px;
            background: radial-gradient(circle, rgba(212, 168, 83, 0.14) 0%, transparent 70%);
            bottom: -90px;
            left: 10%;
            border-radius: 50%;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: linear-gradient(135deg, #D4A853, #B8913E);
            color: #0B1E3A;
            font-weight: 700;
            font-size: 0.98rem;
            padding: 0.8rem 2rem;
            border-radius: 9999px;
            transition: transform 0.25s, box-shadow 0.25s, filter 0.25s;
            box-shadow: 0 6px 22px rgba(212, 168, 83, 0.35);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 34px rgba(212, 168, 83, 0.45);
            filter: brightness(1.05);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            border: 1.5px solid rgba(255, 255, 255, 0.4);
            color: #ffffff;
            font-weight: 600;
            font-size: 0.98rem;
            padding: 0.8rem 2rem;
            border-radius: 9999px;
            transition: background 0.25s, border-color 0.25s, transform 0.25s;
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.7);
            transform: translateY(-2px);
        }
        /* ===== Footer ===== */
        .footer-link {
            color: rgba(203, 213, 225, 0.8);
            font-size: 0.88rem;
            transition: color 0.25s, padding-left 0.25s;
        }
        .footer-link:hover {
            color: #E8C37B;
            padding-left: 4px;
        }
        /* ===== Scroll behaviors ===== */
        @media (prefers-reduced-motion: reduce) {
            * {
                animation-duration: 0.01ms !important;
                transition-duration: 0.01ms !important;
            }
        }
        /* ===== Focus states ===== */
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid #D4A853;
            outline-offset: 3px;
            border-radius: 4px;
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0b1424;
            --primary-light: #1a2942;
            --accent: #d4a853;
            --accent-dark: #b8913a;
            --accent-light: #f0dfb8;
            --bg: #f6f8fb;
            --surface: #ffffff;
            --text: #1e293b;
            --muted: #64748b;
            --border: #e2e8f0;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow: 0 4px 24px rgba(11, 20, 36, 0.06);
            --shadow-lg: 0 12px 40px rgba(11, 20, 36, 0.12);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* ===== 基础重置 ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.6;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        img {
            display: block;
            max-width: 100%;
            height: auto;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.25s ease;
        }
        button {
            font-family: inherit;
            border: none;
            background: none;
            cursor: pointer;
        }
        input,
        textarea {
            font-family: inherit;
        }

        /* ===== 容器 ===== */
        .container {
            max-width: 1280px;
            margin: 0 auto;
        }

        /* ===== 导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(11, 20, 36, 0.95);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .nav-link {
            position: relative;
            font-size: 0.925rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.8);
            padding: 0.375rem 0;
            transition: color 0.3s ease;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            transition: width 0.3s ease;
        }
        .nav-link:hover {
            color: #fff;
        }
        .nav-link:hover::after,
        .nav-link.active::after {
            width: 100%;
        }
        .nav-link.active {
            color: #fff;
            font-weight: 600;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.75rem 1.5rem;
            background: linear-gradient(135deg, #d4a853, #b8913a);
            color: #0b1424;
            font-weight: 700;
            font-size: 0.925rem;
            border-radius: 12px;
            box-shadow: 0 4px 20px rgba(212, 168, 83, 0.35);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(212, 168, 83, 0.45);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 12px rgba(212, 168, 83, 0.3);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.75rem 1.5rem;
            background: transparent;
            color: #fff;
            font-weight: 600;
            font-size: 0.925rem;
            border: 1.5px solid rgba(255, 255, 255, 0.35);
            border-radius: 12px;
            transition: all 0.3s ease;
        }
        .btn-outline:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: rgba(212, 168, 83, 0.08);
        }

        /* ===== 文章 Banner ===== */
        .article-banner {
            position: relative;
            min-height: 320px;
            display: flex;
            align-items: center;
            background: var(--primary);
        }
        .article-banner .bg-layer {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            opacity: 0.5;
        }
        .article-banner .overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(11, 20, 36, 0.95) 30%, rgba(11, 20, 36, 0.7) 70%, rgba(11, 20, 36, 0.4) 100%);
        }

        /* ===== 面包屑 ===== */
        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 0.5rem;
            font-size: 0.875rem;
            color: rgba(255, 255, 255, 0.6);
        }
        .breadcrumb a {
            color: rgba(255, 255, 255, 0.75);
            transition: color 0.25s;
        }
        .breadcrumb a:hover {
            color: var(--accent);
        }
        .breadcrumb .sep {
            color: rgba(255, 255, 255, 0.35);
            font-size: 0.75rem;
        }
        .breadcrumb .current {
            color: rgba(255, 255, 255, 0.9);
            max-width: 220px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        /* ===== 文章卡片 ===== */
        .article-card {
            background: var(--surface);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 2.5rem;
            border: 1px solid rgba(226, 232, 240, 0.6);
        }
        .side-card {
            background: var(--surface);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            border: 1px solid rgba(226, 232, 240, 0.6);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .side-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }

        /* ===== 文章正文排版 ===== */
        .article-content {
            font-size: 1.0625rem;
            line-height: 1.9;
            color: #334155;
        }
        .article-content p {
            margin-bottom: 1.4rem;
        }
        .article-content h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text);
            margin: 2.4rem 0 1.2rem;
            padding-left: 0.9rem;
            border-left: 4px solid var(--accent);
            line-height: 1.4;
        }
        .article-content h3 {
            font-size: 1.3rem;
            font-weight: 600;
            color: var(--text);
            margin: 2rem 0 1rem;
        }
        .article-content h4 {
            font-size: 1.125rem;
            font-weight: 600;
            color: var(--text);
            margin: 1.6rem 0 0.8rem;
        }
        .article-content ul,
        .article-content ol {
            margin-bottom: 1.4rem;
            padding-left: 1.6rem;
        }
        .article-content ul li,
        .article-content ol li {
            margin-bottom: 0.5rem;
        }
        .article-content ul li {
            list-style: disc;
        }
        .article-content ol li {
            list-style: decimal;
        }
        .article-content img {
            border-radius: var(--radius);
            margin: 1.5rem auto;
            box-shadow: var(--shadow);
        }
        .article-content blockquote {
            padding: 1.25rem 1.5rem;
            background: #f8fafc;
            border-left: 4px solid var(--accent);
            border-radius: 0 var(--radius) var(--radius) 0;
            color: var(--muted);
            font-style: italic;
            margin: 1.5rem 0;
        }
        .article-content a {
            color: #b8913a;
            font-weight: 500;
            border-bottom: 1px solid rgba(184, 145, 58, 0.3);
        }
        .article-content a:hover {
            color: var(--accent-dark);
            border-bottom-color: var(--accent-dark);
        }
        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
            font-size: 0.925rem;
        }
        .article-content table th {
            background: #f1f5f9;
            font-weight: 600;
            text-align: left;
        }
        .article-content table th,
        .article-content table td {
            padding: 0.75rem 1rem;
            border: 1px solid var(--border);
        }

        /* ===== 标签 ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            padding: 0.3rem 0.75rem;
            background: #f1f5f9;
            color: #475569;
            font-size: 0.8125rem;
            font-weight: 500;
            border-radius: 999px;
            transition: background 0.3s, color 0.3s;
        }
        .badge:hover {
            background: rgba(212, 168, 83, 0.15);
            color: #b8913a;
        }

        /* ===== 分享按钮 ===== */
        .share-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 2.25rem;
            height: 2.25rem;
            border-radius: 50%;
            background: #f1f5f9;
            color: #64748b;
            font-size: 0.9375rem;
            transition: all 0.3s ease;
        }
        .share-btn:hover {
            background: var(--accent);
            color: #fff;
            transform: translateY(-2px);
        }

        /* ===== 相关文章卡片 ===== */
        .related-card {
            background: var(--surface);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid rgba(226, 232, 240, 0.6);
            transition: all 0.35s ease;
        }
        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }
        .related-card .image-wrap {
            position: relative;
            overflow: hidden;
            height: 190px;
        }
        .related-card .image-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .related-card:hover .image-wrap img {
            transform: scale(1.06);
        }
        .related-card .cat-label {
            position: absolute;
            top: 12px;
            left: 12px;
            padding: 0.25rem 0.75rem;
            background: rgba(11, 20, 36, 0.75);
            backdrop-filter: blur(4px);
            color: #fff;
            font-size: 0.75rem;
            font-weight: 600;
            border-radius: 999px;
            letter-spacing: 0.02em;
        }

        /* ===== CTA 区块 ===== */
        .cta-section {
            position: relative;
            background: var(--primary);
            overflow: hidden;
        }
        .cta-section .bg-layer {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            opacity: 0.35;
        }
        .cta-section .overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(11, 20, 36, 0.92), rgba(11, 20, 36, 0.75));
        }

        /* ===== 页脚 ===== */
        .footer-link {
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.875rem;
            transition: color 0.25s ease, padding-left 0.25s ease;
        }
        .footer-link:hover {
            color: var(--accent);
            padding-left: 2px;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .container {
                padding-left: 1.25rem;
                padding-right: 1.25rem;
            }
            .article-card {
                padding: 2rem;
            }
        }
        @media (max-width: 768px) {
            body {
                font-size: 15px;
            }
            .article-banner {
                min-height: 280px;
            }
            .article-card {
                padding: 1.5rem;
                border-radius: 12px;
            }
            .article-content {
                font-size: 1rem;
                line-height: 1.8;
            }
            .article-content h2 {
                font-size: 1.35rem;
            }
            .article-content h3 {
                font-size: 1.15rem;
            }
        }
        @media (max-width: 520px) {
            .article-banner {
                min-height: 240px;
            }
            .article-banner h1 {
                font-size: 1.5rem !important;
            }
            .article-card {
                padding: 1.25rem;
            }
            .related-card .image-wrap {
                height: 160px;
            }
            .breadcrumb .current {
                max-width: 140px;
            }
        }

        /* ===== 可访问性焦点 ===== */
        a:focus-visible,
        button:focus-visible {
            outline: 3px solid rgba(212, 168, 83, 0.5);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* ===== 滚动条美化 ===== */
        ::-webkit-scrollbar {
            width: 10px;
        }
        ::-webkit-scrollbar-track {
            background: #f1f5f9;
        }
        ::-webkit-scrollbar-thumb {
            background: #cbd5e1;
            border-radius: 5px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: #94a3b8;
        }