/* roulang page: index */
:root {
    --primary: #1a2b4a;
    --primary-dark: #0d1526;
    --accent: #c9a13b;
    --accent-hover: #a8832a;
    --bg: #f5f7fc;
    --text: #1a1f36;
    --text-weak: #6b7280;
    --border: #e6e9f0;
    --radius: 14px;
    --shadow: 0 4px 24px rgba(15, 26, 46, 0.08);
    --shadow-lg: 0 12px 40px rgba(15, 26, 46, 0.14);
  }
  * { box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  body {
    font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.65;
    margin: 0;
    -webkit-font-smoothing: antialiased;
  }
  a { text-decoration: none; color: inherit; }
  img { max-width: 100%; display: block; }
  .container {
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 20px;
    padding-right: 20px;
  }
  @media (max-width: 768px) {
    .container { padding-left: 16px; padding-right: 16px; }
  }
  .section-tag {
    display: inline-block;
    background: linear-gradient(135deg, rgba(201,161,59,0.14), rgba(201,161,59,0.06));
    color: var(--accent-hover);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 2px;
    padding: 6px 18px;
    border-radius: 100px;
    border: 1px solid rgba(201,161,59,0.28);
  }
  .btn-accent {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: linear-gradient(135deg, #c9a13b, #b8902e);
    color: #0d1526;
    font-weight: 600;
    font-size: 15px;
    padding: 14px 30px;
    border-radius: 10px;
    box-shadow: 0 6px 24px rgba(201,161,59,0.38);
    transition: all .25s ease;
  }
  .btn-accent:hover { transform: translateY(-2px); box-shadow: 0 10px 30px rgba(201,161,59,0.45); }
  .btn-outline-white {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    color: #fff;
    font-weight: 600;
    font-size: 15px;
    padding: 13px 28px;
    border-radius: 10px;
    border: 2px solid rgba(255,255,255,0.7);
    transition: all .25s ease;
  }
  .btn-outline-white:hover { background: rgba(255,255,255,0.12); border-color: #fff; transform: translateY(-2px); }
  .btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--primary);
    color: #fff;
    font-weight: 600;
    font-size: 14px;
    padding: 10px 22px;
    border-radius: 8px;
    transition: all .25s ease;
  }
  .btn-primary:hover { background: var(--primary-dark); box-shadow: 0 6px 20px rgba(26,43,74,0.3); }

  .nav-link {
    position: relative;
    font-size: 15px;
    font-weight: 500;
    color: #4b5563;
    padding: 6px 4px;
    transition: color .25s;
  }
  .nav-link::after {
    content: '';
    position: absolute;
    left: 0; right: 0; bottom: 0;
    height: 2px;
    background: var(--accent);
    border-radius: 2px;
    transform: scaleX(0);
    transition: transform .3s ease;
  }
  .nav-link:hover { color: var(--primary); }
  .nav-link:hover::after { transform: scaleX(1); }
  .nav-link.active { color: var(--primary); font-weight: 700; }
  .nav-link.active::after { transform: scaleX(1); }

  .tag {
    display: inline-block;
    font-size: 12px;
    color: var(--text-weak);
    background: #f2f4f8;
    border: 1px solid var(--border);
    border-radius: 100px;
    padding: 3px 12px;
    white-space: nowrap;
    transition: all .2s;
  }
  .tag:hover { border-color: var(--accent); color: var(--accent-hover); }

  .hero-shadow {
    background: linear-gradient(to right, rgba(13,21,38,0.88), rgba(26,43,74,0.62));
  }
  .stat-box {
    background: rgba(255,255,255,0.12);
    backdrop-filter: blur(10px);
    border-radius: 14px;
    padding: 18px 14px;
    text-align: center;
    border: 1px solid rgba(255,255,255,0.16);
  }
  .stat-number { font-size: 28px; font-weight: 800; color: #fff; line-height: 1.2; }
  .stat-label { font-size: 12px; color: rgba(255,255,255,0.7); margin-top: 4px; display: block; }

  .feature-card {
    background: #fff;
    border-radius: var(--radius);
    padding: 32px 26px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    transition: all .3s ease;
  }
  .feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: rgba(201,161,59,0.4); }
  .feature-icon {
    width: 56px; height: 56px;
    border-radius: 16px;
    display: flex; align-items: center; justify-content: center;
    font-size: 22px;
    color: #fff;
    background: linear-gradient(135deg, var(--primary), #2d4578);
    margin-bottom: 18px;
  }

  .cover-card {
    background: #fff;
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    transition: all .3s ease;
    display: block;
  }
  .cover-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
  .cover-card .img-wrap { overflow: hidden; position: relative; }
  .cover-card img { transition: transform .5s ease; }
  .cover-card:hover img { transform: scale(1.05); }

  .badge {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    color: var(--accent-hover);
    background: rgba(201,161,59,0.12);
    border: 1px solid rgba(201,161,59,0.2);
    padding: 3px 12px;
    border-radius: 100px;
  }

  .article-card {
    background: #fff;
    border-radius: 14px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    padding: 24px;
    display: block;
    transition: all .3s ease;
    height: 100%;
  }
  .article-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); border-color: rgba(201,161,59,0.3); }

  .step-card {
    background: rgba(255,255,255,0.09);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255,255,255,0.14);
    border-radius: 16px;
    padding: 30px 22px;
    transition: all .3s ease;
  }
  .step-card:hover { background: rgba(255,255,255,0.16); transform: translateY(-3px); }
  .step-num {
    font-size: 42px; font-weight: 900;
    color: rgba(255,255,255,0.2);
    line-height: 1;
    display: block;
    margin-bottom: 14px;
  }
  .step-title { color: #fff; font-weight: 700; font-size: 17px; margin-bottom: 8px; }
  .step-desc { color: rgba(255,255,255,0.72); font-size: 14px; line-height: 1.6; }

  .advantage-item {
    background: #f9fafc;
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 24px 20px;
    display: flex;
    gap: 16px;
    transition: all .3s ease;
  }
  .advantage-item:hover { background: #fff; box-shadow: var(--shadow); border-color: rgba(201,161,59,0.3); }
  .advantage-icon {
    width: 44px; height: 44px; flex: none;
    border-radius: 12px;
    background: rgba(201,161,59,0.12);
    color: var(--accent-hover);
    display: flex; align-items: center; justify-content: center;
    font-size: 18px;
  }

  .faq-item {
    background: #fff;
    border-radius: 14px;
    border: 1px solid var(--border);
    overflow: hidden;
    margin-bottom: 14px;
    transition: border-color .3s;
  }
  .faq-item:hover { border-color: rgba(201,161,59,0.3); }
  .faq-item summary {
    list-style: none;
    cursor: pointer;
    padding: 22px 26px;
    font-weight: 600;
    font-size: 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
  }
  .faq-item summary::-webkit-details-marker { display: none; }
  .faq-item summary .fa-chevron-down { transition: transform .3s; color: var(--accent); font-size: 14px; }
  .faq-item[open] summary .fa-chevron-down { transform: rotate(180deg); }
  .faq-item .faq-body {
    padding: 0 26px 22px;
    color: var(--text-weak);
    font-size: 15px;
    line-height: 1.7;
  }

  .cta-gradient {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, #29406d 100%);
    position: relative;
    overflow: hidden;
  }
  .cta-gradient::after{
    content:'';
    position:absolute;
    top:-40%; right:-10%;
    width:420px; height:420px;
    background: radial-gradient(circle, rgba(201,161,59,0.2) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events:none;
  }

  footer {
    background: #0d1526;
    color: rgba(255,255,255,0.6);
  }
  footer a { color: rgba(255,255,255,0.5); transition: color .2s; }
  footer a:hover { color: #fff; }

  @media (max-width: 768px) {
    .stat-number { font-size: 22px; }
    .btn-accent, .btn-outline-white { padding: 11px 22px; font-size: 14px; }
  }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
  :root {
    --primary: #12263A;
    --primary-dark: #0B1826;
    --primary-light: #1B3A57;
    --accent: #C9A227;
    --accent-light: #E2B94F;
    --bg: #F4F6FA;
    --white: #FFFFFF;
    --text: #1E293B;
    --text-muted: #64748B;
    --border: #E4EAF1;
    --radius: 16px;
    --radius-sm: 10px;
    --radius-lg: 24px;
    --shadow-sm: 0 2px 10px rgba(18, 38, 58, 0.05);
    --shadow: 0 10px 30px rgba(18, 38, 58, 0.08);
    --shadow-lg: 0 20px 48px rgba(18, 38, 58, 0.14);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }

  /* ===== Reset / Base ===== */
  *, *::before, *::after { box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", sans-serif;
    font-size: 15px;
    line-height: 1.65;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
  }
  a { color: inherit; text-decoration: none; transition: color 0.2s ease; }
  img { max-width: 100%; height: auto; display: block; }
  button { font-family: inherit; cursor: pointer; border: none; background: none; padding: 0; }
  input { font-family: inherit; }
  ul, ol { list-style: none; padding: 0; margin: 0; }
  h1, h2, h3, h4, h5, h6 { margin: 0; font-weight: 700; line-height: 1.3; color: var(--primary); }
  p { margin: 0; }

  :focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
    border-radius: 4px;
  }

  /* ===== 容器 ===== */
  .container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding-left: 20px;
    padding-right: 20px;
  }

  /* ===== 按钮 ===== */
  .btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 11px 24px;
    border-radius: 999px;
    background: linear-gradient(135deg, var(--accent), var(--accent-light));
    color: var(--primary-dark);
    font-size: 14px;
    font-weight: 600;
    line-height: 1.4;
    box-shadow: 0 6px 18px rgba(201, 162, 39, 0.32);
    transition: var(--transition);
    white-space: nowrap;
  }
  .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 26px rgba(201, 162, 39, 0.42);
    color: var(--primary-dark);
  }
  .btn-primary:active { transform: translateY(0); box-shadow: 0 4px 12px rgba(201, 162, 39, 0.3); }

  .btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 22px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: #fff;
    color: var(--text);
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
    white-space: nowrap;
  }
  .btn-outline:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); box-shadow: var(--shadow-sm); }
  .btn-outline:active { transform: translateY(0); }

  .btn-outline-light {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 22px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.45);
    color: #fff;
    font-size: 14px;
    font-weight: 500;
    background: rgba(255, 255, 255, 0.06);
    transition: var(--transition);
    white-space: nowrap;
  }
  .btn-outline-light:hover { background: rgba(255, 255, 255, 0.14); border-color: #fff; color: #fff; transform: translateY(-2px); }
  .btn-outline-light:active { transform: translateY(0); }

  /* ===== 标签 ===== */
  .tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 13px;
    font-size: 12px;
    line-height: 1.6;
    border-radius: 999px;
    background: #F1F5F9;
    border: 1px solid var(--border);
    color: var(--text-muted);
    white-space: nowrap;
    transition: var(--transition);
  }
  a.tag:hover { color: var(--accent); border-color: rgba(201, 162, 39, 0.4); background: #FFFBF0; }

  .hero-badge {
    display: inline-flex;
    align-items: center;
    padding: 6px 16px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.18);
    color: rgba(255, 255, 255, 0.92);
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.04em;
    backdrop-filter: blur(8px);
  }

  /* ===== 导航 ===== */
  .nav-link {
    position: relative;
    display: inline-flex;
    align-items: center;
    height: 100%;
    font-size: 14px;
    font-weight: 500;
    color: #526175;
    letter-spacing: 0.01em;
    transition: var(--transition);
  }
  .nav-link::after {
    content: '';
    position: absolute;
    left: 4px;
    right: 4px;
    bottom: -1px;
    height: 2px;
    border-radius: 2px;
    background: linear-gradient(90deg, var(--accent), var(--accent-light));
    transform: scaleX(0);
    transform-origin: center;
    transition: transform 0.3s ease;
  }
  .nav-link:hover { color: var(--primary); }
  .nav-link:hover::after { transform: scaleX(1); }
  .nav-link.active { color: var(--primary); font-weight: 600; }
  .nav-link.active::after { transform: scaleX(1); }

  /* ===== 板块通用 ===== */
  .section { padding: 88px 0; }
  .section--white { background: #fff; }

  .section-head { max-width: 660px; margin-bottom: 44px; }
  .section-head--center { margin-left: auto; margin-right: auto; text-align: center; }

  .section-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--accent);
    padding: 5px 14px;
    border-radius: 999px;
    background: rgba(201, 162, 39, 0.08);
    border: 1px solid rgba(201, 162, 39, 0.18);
    margin-bottom: 14px;
  }
  .section-title { font-size: 30px; letter-spacing: -0.01em; }
  .section-subtitle { color: var(--text-muted); font-size: 15px; margin-top: 10px; }

  /* ===== 卡片 ===== */
  .card {
    background: #fff;
    border-radius: var(--radius);
    border: 1px solid rgba(228, 234, 241, 0.8);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
  }
  .card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
    border-color: rgba(201, 162, 39, 0.35);
  }
  .card-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    background: linear-gradient(135deg, rgba(201, 162, 39, 0.14), rgba(226, 185, 79, 0.08));
    color: var(--accent);
    border: 1px solid rgba(201, 162, 39, 0.16);
  }
  .card--core { padding: 28px 24px; }
  .card-title { font-size: 17px; margin-top: 18px; }
  .card-desc { font-size: 13.5px; color: var(--text-muted); line-height: 1.7; margin-top: 8px; }
  .card-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 600;
    color: var(--accent);
    margin-top: 14px;
    transition: var(--transition);
  }
  .card-link i { transition: transform 0.25s ease; }
  .card-link:hover { color: var(--primary); }
  .card-link:hover i { transform: translateX(4px); }

  /* 图文卡片 */
  .card-image {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius) var(--radius) 0 0;
    aspect-ratio: 16 / 10;
  }
  .card-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
  .card:hover .card-image img { transform: scale(1.04); }
  .card-image::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(12, 26, 42, 0.32), transparent 55%);
    opacity: 0.6;
    transition: opacity 0.3s ease;
  }
  .card:hover .card-image::after { opacity: 0.85; }
  .card-body { padding: 24px; }
  .card-body .tag { margin-bottom: 12px; }
  .card-body h3 { font-size: 18px; }
  .card-body p { font-size: 13.5px; color: var(--text-muted); margin-top: 8px; line-height: 1.7; }

  /* ===== 首屏页面 Hero ===== */
  .page-hero {
    position: relative;
    padding: 72px 0 88px;
    background-size: cover;
    background-position: center;
    overflow: hidden;
  }
  .page-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(11, 24, 38, 0.94) 0%, rgba(18, 38, 58, 0.78) 55%, rgba(27, 58, 87, 0.62) 100%);
  }
  .page-hero h1 { color: #fff; font-size: 40px; line-height: 1.25; letter-spacing: -0.01em; }
  .page-hero p { color: rgba(255, 255, 255, 0.75); font-size: 15px; line-height: 1.75; }

  .hero-stat {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius);
    padding: 16px 20px;
    display: flex;
    flex-direction: column;
    gap: 2px;
    backdrop-filter: blur(6px);
    transition: var(--transition);
  }
  .hero-stat:hover { background: rgba(255, 255, 255, 0.1); border-color: rgba(226, 185, 79, 0.35); transform: translateY(-3px); }
  .hero-wave {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 44px;
    background: linear-gradient(to top, var(--bg), transparent);
  }

  /* ===== 面包屑 ===== */
  .breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 28px;
    flex-wrap: wrap;
  }
  .breadcrumb a { color: rgba(255, 255, 255, 0.6); }
  .breadcrumb a:hover { color: #fff; }
  .breadcrumb i { font-size: 10px; color: rgba(255, 255, 255, 0.35); }
  .breadcrumb span { color: #fff; font-weight: 500; }

  /* ===== 步骤时间线 ===== */
  .steps-wrap {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
    margin-top: 44px;
  }
  .step-card {
    position: relative;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px 22px 24px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    text-align: center;
  }
  .step-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); border-color: rgba(201, 162, 39, 0.3); }
  .step-num {
    width: 44px;
    height: 44px;
    margin: 0 auto;
    border-radius: 12px;
    background: var(--primary);
    color: #fff;
    font-size: 15px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 6px 16px rgba(18, 38, 58, 0.22);
  }
  .step-card h3 { font-size: 15.5px; margin-top: 16px; }
  .step-card p { font-size: 13px; color: var(--text-muted); line-height: 1.7; margin-top: 8px; }

  /* ===== 技巧列表 ===== */
  .tips-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 40px; }
  .tip-card {
    display: flex;
    gap: 14px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
  }
  .tip-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: rgba(201, 162, 39, 0.28); }
  .tip-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    border-radius: 11px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: var(--accent-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 15px;
    box-shadow: 0 4px 12px rgba(18, 38, 58, 0.18);
  }
  .tip-card h3 { font-size: 14.5px; }
  .tip-card p { font-size: 13px; color: var(--text-muted); margin-top: 5px; line-height: 1.65; }

  /* ===== FAQ ===== */
  .faq-wrap { max-width: 820px; margin: 40px auto 0; display: flex; flex-direction: column; gap: 14px; }
  .faq-item {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 14px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    overflow: hidden;
  }
  .faq-item:hover { border-color: rgba(201, 162, 39, 0.3); }
  .faq-item[open] { border-color: rgba(201, 162, 39, 0.4); box-shadow: var(--shadow); }
  .faq-item summary {
    list-style: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 20px 24px;
    font-size: 15px;
    font-weight: 600;
    color: var(--primary);
    transition: var(--transition);
    user-select: none;
  }
  .faq-item summary::-webkit-details-marker { display: none; }
  .faq-item summary i.fa-chevron-down { transition: transform 0.3s ease; color: var(--accent); font-size: 13px; flex-shrink: 0; }
  .faq-item[open] summary i.fa-chevron-down { transform: rotate(180deg); }
  .faq-item .faq-answer {
    padding: 16px 24px 22px;
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.8;
    border-top: 1px dashed var(--border);
    margin: 0;
  }

  /* ===== CTA ===== */
  .cta-section {
    position: relative;
    padding: 88px 0;
    background: url('/assets/images/backpic/back-3.png') center / cover no-repeat;
  }
  .cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(11, 24, 38, 0.94), rgba(18, 38, 58, 0.82) 60%, rgba(27, 58, 87, 0.72));
  }
  .cta-card { position: relative; z-index: 1; text-align: center; max-width: 680px; margin: 0 auto; }
  .cta-card h2 { color: #fff; font-size: 30px; }
  .cta-card p { color: rgba(255, 255, 255, 0.7); font-size: 15px; margin-top: 12px; }

  /* ===== 页脚 ===== */
  footer { background: var(--primary-dark); color: rgba(255, 255, 255, 0.45); }
  footer a { transition: color 0.2s ease; }
  footer a:hover { color: var(--accent); }

  /* ===== 响应式 ===== */
  @media (max-width: 1024px) {
    .section { padding: 72px 0; }
    .section-title { font-size: 26px; }
    .steps-wrap { grid-template-columns: repeat(3, 1fr); }
    .tips-grid { grid-template-columns: repeat(2, 1fr); }
    .page-hero h1 { font-size: 34px; }
  }
  @media (max-width: 768px) {
    .section { padding: 60px 0; }
    .container { padding-left: 16px; padding-right: 16px; }
    .section-title { font-size: 22px; }
    .page-hero { padding: 56px 0 68px; }
    .page-hero h1 { font-size: 28px; line-height: 1.3; }
    .steps-wrap { grid-template-columns: repeat(2, 1fr); }
    .cta-section { padding: 64px 0; }
    .cta-card h2 { font-size: 24px; }
    .section-head { margin-bottom: 32px; }
  }
  @media (max-width: 520px) {
    .section { padding: 52px 0; }
    .card--core { padding: 22px 18px; }
    .steps-wrap { grid-template-columns: 1fr; }
    .tips-grid { grid-template-columns: 1fr; }
    .faq-item summary { font-size: 14px; padding: 18px; }
    .faq-item .faq-answer { padding: 14px 18px 18px; font-size: 13.5px; }
    .hero-stat { padding: 12px 16px; }
    .page-hero p { font-size: 14px; }
  }

/* roulang page: article */
:root {
    --primary: #123d6e;
    --primary-dark: #081f3a;
    --primary-light: #1e5ba8;
    --accent: #f0b545;
    --accent-dark: #e0a42e;
    --text-main: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --bg-light: #f8fafc;
    --border: #e5e7eb;
    --radius: 14px;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 10px 30px rgba(18, 61, 110, 0.08);
    --shadow-lg: 0 20px 40px rgba(18, 61, 110, 0.12);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }
  * {
    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", "Helvetica Neue", Arial, sans-serif;
    line-height: 1.7;
    color: var(--text-main);
    background: #ffffff;
    -webkit-font-smoothing: antialiased;
  }
  img {
    max-width: 100%;
    display: block;
  }
  a {
    text-decoration: none;
    color: inherit;
  }
  button {
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
  }
  input,
  textarea {
    font-family: inherit;
  }
  .container {
    width: 100% !important;
    max-width: 1280px !important;
    margin-left: auto !important;
    margin-right: auto !important;
    padding-left: 1.25rem !important;
    padding-right: 1.25rem !important;
  }
  .btn-primary,
  .btn-accent,
  .btn-outline-light,
  .btn-outline-dark {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.65rem 1.5rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 600;
    transition: var(--transition);
    border: 1px solid transparent;
    white-space: nowrap;
    line-height: inherit;
  }
  .btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 4px 14px rgba(18, 61, 110, 0.2);
  }
  .btn-primary:hover {
    background: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(18, 61, 110, 0.28);
    color: #fff;
  }
  .btn-accent {
    background: var(--accent);
    color: var(--primary-dark);
    box-shadow: 0 4px 14px rgba(240, 181, 69, 0.3);
  }
  .btn-accent:hover {
    background: var(--accent-dark);
    color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(240, 181, 69, 0.4);
  }
  .btn-outline-light {
    border-color: rgba(255, 255, 255, 0.5);
    color: #fff;
  }
  .btn-outline-light:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: #fff;
    color: #fff;
    transform: translateY(-2px);
  }
  .btn-outline-dark {
    border-color: var(--border);
    color: var(--text-main);
  }
  .btn-outline-dark:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(18, 61, 110, 0.04);
  }
  .tag {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.3rem 0.8rem;
    background: var(--bg-light);
    border: 1px solid var(--border);
    border-radius: 9999px;
    font-size: 0.75rem;
    color: var(--text-secondary);
    cursor: default;
    transition: var(--transition);
    white-space: nowrap;
  }
  .tag:hover {
    border-color: var(--accent);
    color: var(--accent-dark);
  }
  .badge {
    display: inline-block;
    padding: 0.25rem 0.9rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--primary);
    background: rgba(18, 61, 110, 0.08);
    border: 1px solid rgba(18, 61, 110, 0.15);
    border-radius: 9999px;
    letter-spacing: 0.02em;
  }
  .section {
    padding: 4rem 0;
  }
  @media (min-width: 768px) {
    .section {
      padding: 5.5rem 0;
    }
  }
  .section-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent-dark);
    background: rgba(240, 181, 69, 0.12);
    padding: 0.35rem 1rem;
    border-radius: 9999px;
    border: 1px solid rgba(240, 181, 69, 0.25);
  }
  .section-title {
    font-size: 1.75rem;
    line-height: 1.3;
    font-weight: 800;
    color: var(--text-main);
    margin-top: 0.85rem;
    letter-spacing: -0.02em;
  }
  @media (min-width: 768px) {
    .section-title {
      font-size: 2.1rem;
    }
  }
  .section-desc {
    color: var(--text-secondary);
    margin-top: 0.75rem;
    font-size: 0.95rem;
    line-height: 1.7;
  }
  .nav-link {
    position: relative;
    padding: 0.55rem 0.25rem;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color 0.25s ease;
    border-bottom: 2px solid transparent;
  }
  .nav-link:hover {
    color: var(--primary);
  }
  .nav-link.active {
    color: var(--primary);
    font-weight: 600;
    border-bottom-color: var(--accent);
  }
  .feature-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 2rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
  }
  .feature-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    opacity: 0;
    transition: opacity 0.3s ease;
  }
  .feature-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(18, 61, 110, 0.1);
  }
  .feature-card:hover::before {
    opacity: 1;
  }
  .feature-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    background: linear-gradient(135deg, rgba(18, 61, 110, 0.08), rgba(240, 181, 69, 0.15));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--primary);
    margin-bottom: 1.1rem;
    transition: var(--transition);
  }
  .feature-card:hover .feature-icon {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: #fff;
    transform: scale(1.05);
  }
  .feature-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-main);
  }
  .feature-card p {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.65;
  }
  .suggestion-card {
    display: block;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 1.5rem;
    transition: var(--transition);
  }
  .suggestion-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: rgba(18, 61, 110, 0.15);
  }
  .suggestion-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: rgba(18, 61, 110, 0.06);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 1.05rem;
    margin-bottom: 1rem;
    transition: var(--transition);
  }
  .suggestion-card:hover .suggestion-icon {
    background: var(--primary);
    color: #fff;
  }
  .suggestion-card h4 {
    font-weight: 700;
    font-size: 1rem;
    color: var(--text-main);
    margin-bottom: 0.35rem;
  }
  .suggestion-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 0.75rem;
  }
  .faq-item {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 16px;
    transition: var(--transition);
    overflow: hidden;
  }
  .faq-item:hover {
    border-color: rgba(18, 61, 110, 0.2);
  }
  .faq-item summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.1rem 1.5rem;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-main);
    list-style: none;
  }
  .faq-item summary::-webkit-details-marker {
    display: none;
  }
  .faq-item summary i {
    color: var(--accent-dark);
    transition: transform 0.3s ease;
  }
  .faq-item[open] summary i {
    transform: rotate(45deg);
  }
  .faq-item p {
    padding: 0 1.5rem 1.3rem;
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.75;
  }
  .article-content {
    font-size: 1rem;
    line-height: 1.9;
    color: #374151;
  }
  .article-content h2,
  .article-content h3,
  .article-content h4 {
    font-weight: 700;
    color: var(--text-main);
    margin: 2.2rem 0 1rem;
  }
  .article-content h2 {
    font-size: 1.5rem;
    padding-bottom: 0.6rem;
    border-bottom: 1px solid var(--border);
  }
  .article-content h3 {
    font-size: 1.2rem;
  }
  .article-content p {
    margin-bottom: 1.3rem;
  }
  .article-content a {
    color: var(--primary);
    font-weight: 500;
    border-bottom: 1px solid rgba(18, 61, 110, 0.2);
    transition: var(--transition);
  }
  .article-content a:hover {
    color: var(--accent-dark);
    border-bottom-color: var(--accent-dark);
  }
  .article-content ul,
  .article-content ol {
    margin: 0 0 1.3rem 1.4rem;
  }
  .article-content ul {
    list-style: disc;
  }
  .article-content ol {
    list-style: decimal;
  }
  .article-content li {
    margin-bottom: 0.4rem;
  }
  .article-content blockquote {
    border-left: 4px solid var(--accent);
    padding: 0.8rem 1.2rem;
    background: rgba(240, 181, 69, 0.08);
    border-radius: 0 12px 12px 0;
    margin: 1.5rem 0;
    font-style: italic;
    color: var(--text-secondary);
  }
  .article-content img {
    border-radius: 12px;
    margin: 1.5rem 0;
    box-shadow: var(--shadow-md);
  }
  .mobile-menu {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
  }
  .mobile-menu.open {
    max-height: 320px;
  }
  a:focus-visible,
  button:focus-visible,
  summary:focus-visible,
  input:focus-visible {
    outline: 3px solid rgba(240, 181, 69, 0.5);
    outline-offset: 2px;
    border-radius: 6px;
  }
  ::-webkit-scrollbar {
    width: 8px;
    height: 8px;
  }
  ::-webkit-scrollbar-track {
    background: #f1f5f9;
  }
  ::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 8px;
  }
  @media (max-width: 1024px) {
    .container {
      padding-left: 1.25rem !important;
      padding-right: 1.25rem !important;
    }
  }
  @media (max-width: 768px) {
    .section-title {
      font-size: 1.5rem;
    }
    .feature-card {
      padding: 1.5rem;
    }
    .article-content {
      font-size: 0.95rem;
    }
    .faq-item summary {
      padding: 1rem 1.2rem;
      font-size: 0.9rem;
    }
    .faq-item p {
      padding: 0 1.2rem 1.1rem;
    }
  }
  @media (max-width: 520px) {
    .container {
      padding-left: 1rem !important;
      padding-right: 1rem !important;
    }
    .suggestion-card {
      padding: 1.2rem;
    }
    .badge {
      padding: 0.2rem 0.7rem;
      font-size: 0.7rem;
    }
  }