/* roulang page: index */
:root {
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-primary-darker: #1e3a8a;
    --color-accent: #ff6b3d;
    --color-accent-dark: #f0542c;
    --color-bg: #f8fafc;
    --color-surface: #ffffff;
    --color-text: #0f172a;
    --color-text-soft: #64748b;
    --color-border: #e2e8f0;
    --radius-lg: 20px;
    --radius-md: 14px;
    --radius-sm: 10px;
    --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.05);
    --shadow-md: 0 8px 30px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 20px 50px rgba(15, 23, 42, 0.12);
    --container: 1200px;
  }

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

  html {
    scroll-behavior: smooth;
  }

  body {
    font-family: 'Inter', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    font-size: 16px;
  }

  a {
    text-decoration: none;
    color: inherit;
    transition: color 0.2s ease;
  }

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

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

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

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

  /* ---------- Header / Nav ---------- */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(226, 232, 240, 0.8);
    box-shadow: 0 1px 0 rgba(15, 23, 42, 0.02);
  }

  .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    height: 72px;
  }

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

  .logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: #fff;
    font-weight: 800;
    font-size: 20px;
    box-shadow: 0 6px 16px rgba(37, 99, 235, 0.3);
  }

  .logo-text {
    font-size: 20px;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--color-text);
    white-space: nowrap;
  }

  .logo-highlight {
    color: var(--color-primary);
  }

  .main-nav {
    display: flex;
    align-items: center;
    gap: 4px;
    margin: 0 auto;
  }

  .nav-link {
    position: relative;
    padding: 10px 16px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 500;
    color: var(--color-text-soft);
    transition: all 0.2s ease;
    white-space: nowrap;
  }

  .nav-link:hover {
    color: var(--color-primary);
    background: #eef5ff;
  }

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

  .nav-link.active::after {
    content: '';
    position: absolute;
    left: 16px;
    right: 16px;
    bottom: 4px;
    height: 3px;
    border-radius: 3px;
    background: var(--color-primary);
  }

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

  .search-box {
    display: flex;
    align-items: center;
    background: #f1f5f9;
    border: 1px solid transparent;
    border-radius: 999px;
    padding: 6px 6px 6px 16px;
    gap: 8px;
    transition: all 0.2s ease;
    width: 190px;
  }

  .search-box:focus-within {
    border-color: var(--color-primary);
    background: #fff;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
  }

  .search-box input {
    border: none;
    outline: none;
    background: transparent;
    width: 100%;
    font-size: 14px;
    color: var(--color-text);
  }

  .search-box button {
    border: none;
    background: var(--color-primary);
    color: #fff;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background 0.2s ease;
    flex-shrink: 0;
  }

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

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    font-weight: 600;
    font-size: 15px;
    padding: 10px 20px;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
  }

  .btn-primary {
    background: var(--color-primary);
    color: #fff;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.25);
  }

  .btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 8px 24px rgba(37, 99, 235, 0.3);
  }

  .btn-primary:active {
    transform: translateY(0);
  }

  .btn-outline {
    border-color: rgba(255, 255, 255, 0.5);
    color: #fff;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(4px);
  }

  .btn-outline:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: #fff;
    color: #fff;
  }

  .btn-ghost {
    background: transparent;
    color: var(--color-text);
    padding: 10px 14px;
  }

  .btn-ghost:hover {
    background: #f1f5f9;
    color: var(--color-primary);
  }

  .btn-lg {
    padding: 14px 30px;
    font-size: 16px;
    border-radius: 12px;
  }

  .menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    border: none;
    background: transparent;
    padding: 10px;
    cursor: pointer;
    border-radius: 8px;
  }

  .menu-toggle span {
    width: 22px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all 0.3s ease;
  }

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

  .menu-toggle.open span:nth-child(2) {
    opacity: 0;
  }

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

  .mobile-nav {
    display: none;
    background: #fff;
    border-top: 1px solid var(--color-border);
    padding: 12px 0;
  }

  .mobile-nav.open {
    display: block;
  }

  .mobile-nav .nav-link {
    display: block;
    padding: 12px 24px;
    border-radius: 0;
    font-size: 16px;
  }

  .mobile-nav .nav-link.active {
    background: #eef5ff;
  }

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

  .section-head {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 48px;
  }

  .section-tag {
    display: inline-block;
    background: #eef5ff;
    color: var(--color-primary);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.08em;
    padding: 6px 16px;
    border-radius: 999px;
    margin-bottom: 14px;
  }

  .section-head h2 {
    font-size: 34px;
    line-height: 1.25;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--color-text);
    margin-bottom: 12px;
  }

  .section-head p {
    font-size: 16px;
    color: var(--color-text-soft);
    line-height: 1.7;
  }

  /* ---------- Hero ---------- */
  .hero {
    position: relative;
    background-size: cover;
    background-position: center;
    padding: 130px 0 110px;
    color: #fff;
    overflow: hidden;
  }

  .hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(120deg, rgba(15, 23, 42, 0.92) 0%, rgba(15, 23, 42, 0.65) 50%, rgba(37, 99, 235, 0.35) 100%);
    z-index: 1;
  }

  .hero-content {
    position: relative;
    z-index: 2;
    max-width: 780px;
  }

  .hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.22);
    backdrop-filter: blur(8px);
    color: #fff;
    font-size: 13px;
    font-weight: 500;
    padding: 8px 18px;
    border-radius: 999px;
    margin-bottom: 24px;
    letter-spacing: 0.02em;
  }

  .hero-badge::before {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #4ade80;
    box-shadow: 0 0 12px #4ade80;
  }

  .hero-title {
    font-size: 48px;
    line-height: 1.18;
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 20px;
    text-shadow: 0 2px 24px rgba(0, 0, 0, 0.2);
  }

  .hero-subtitle {
    font-size: 17px;
    line-height: 1.75;
    color: rgba(255, 255, 255, 0.85);
    max-width: 620px;
    margin-bottom: 36px;
  }

  .hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-bottom: 56px;
  }

  .hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    max-width: 640px;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.18);
  }

  .stat strong {
    display: block;
    font-size: 28px;
    font-weight: 800;
    line-height: 1.2;
  }

  .stat span {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.7);
  }

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

  /* ---------- Feature ---------- */
  .feature-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    transition: all 0.25s ease;
    box-shadow: var(--shadow-sm);
  }

  .feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: #bfdbfe;
  }

  .feature-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    background: linear-gradient(135deg, #eef5ff, #dbe8ff);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--color-primary);
    margin-bottom: 20px;
  }

  .feature-card h3 {
    font-size: 19px;
    font-weight: 700;
    margin-bottom: 10px;
  }

  .feature-card p {
    color: var(--color-text-soft);
    font-size: 15px;
    line-height: 1.7;
  }

  /* ---------- Categories ---------- */
  .categories {
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
  }

  .cat-card {
    display: flex;
    flex-direction: column;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all 0.25s ease;
    box-shadow: var(--shadow-sm);
  }

  .cat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: #bfdbfe;
  }

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

  .cat-card:hover img {
    transform: scale(1.05);
  }

  .cat-body {
    padding: 26px 24px;
    display: flex;
    flex-direction: column;
    flex: 1;
  }

  .cat-label {
    display: inline-block;
    align-self: flex-start;
    background: #eef5ff;
    color: var(--color-primary);
    font-size: 12px;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 999px;
    margin-bottom: 12px;
  }

  .cat-body h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 8px;
  }

  .cat-body p {
    color: var(--color-text-soft);
    font-size: 14px;
    line-height: 1.7;
    flex: 1;
    margin-bottom: 16px;
  }

  .cat-more {
    color: var(--color-primary);
    font-size: 14px;
    font-weight: 600;
  }

  /* ---------- Posts ---------- */
  .post-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .post-card {
    display: flex;
    gap: 20px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 18px;
    transition: all 0.25s ease;
    box-shadow: var(--shadow-sm);
  }

  .post-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
    border-color: #bfdbfe;
  }

  .post-thumb {
    width: 180px;
    height: 132px;
    border-radius: var(--radius-md);
    overflow: hidden;
    flex-shrink: 0;
    background: #eef5ff;
  }

  .post-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  .post-info {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-width: 0;
  }

  .post-cat {
    display: inline-block;
    align-self: flex-start;
    background: #eef5ff;
    color: var(--color-primary);
    font-size: 12px;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: 999px;
    margin-bottom: 8px;
  }

  .post-info h3 {
    font-size: 18px;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 6px;
    color: var(--color-text);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .post-info p {
    color: var(--color-text-soft);
    font-size: 14px;
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex: 1;
  }

  .post-date {
    font-size: 13px;
    color: #94a3b8;
    margin-top: 8px;
  }

  .empty-state {
    grid-column: 1 / -1;
    background: var(--color-surface);
    border: 1px dashed #cbd5e1;
    border-radius: var(--radius-lg);
    padding: 48px 24px;
    text-align: center;
    color: var(--color-text-soft);
  }

  /* ---------- Steps ---------- */
  .steps-section {
    background: linear-gradient(180deg, #f8fafc, #eef2ff);
  }

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

  .step-item {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    box-shadow: var(--shadow-sm);
  }

  .step-num {
    font-size: 32px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--color-primary), #60a5fa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: block;
    margin-bottom: 12px;
  }

  .step-item h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
  }

  .step-item p {
    color: var(--color-text-soft);
    font-size: 14px;
    line-height: 1.65;
  }

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

  .faq-item {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all 0.2s ease;
  }

  .faq-item:hover {
    border-color: #bfdbfe;
  }

  .faq-item summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    list-style: none;
    color: var(--color-text);
  }

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

  .faq-item summary::after {
    content: '+';
    font-size: 24px;
    color: var(--color-primary);
    font-weight: 400;
    transition: transform 0.2s ease;
  }

  .faq-item[open] summary::after {
    transform: rotate(45deg);
  }

  .faq-item .faq-body {
    padding: 0 24px 20px;
    color: var(--color-text-soft);
    font-size: 15px;
    line-height: 1.7;
  }

  /* ---------- CTA ---------- */
  .cta-block {
    position: relative;
    background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
    padding: 90px 0;
    color: #fff;
  }

  .cta-block::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(23, 37, 84, 0.86);
  }

  .cta-inner {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 640px;
  }

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

  .cta-inner p {
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 30px;
    line-height: 1.7;
  }

  .btn-light {
    background: #fff;
    color: var(--color-primary-dark);
    border: none;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  }

  .btn-light:hover {
    background: #eef5ff;
    transform: translateY(-2px);
    color: var(--color-primary-dark);
  }

  /* ---------- Footer ---------- */
  .site-footer {
    background: #0f172a;
    color: #94a3b8;
    padding-top: 64px;
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 40px;
  }

  .footer-brand p {
    margin-top: 16px;
    font-size: 14px;
    line-height: 1.7;
    max-width: 340px;
  }

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

  .footer-brand .logo-highlight {
    color: #60a5fa;
  }

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

  .footer-links a,
  .footer-contact p {
    display: block;
    font-size: 14px;
    color: #94a3b8;
    padding: 5px 0;
    transition: color 0.2s ease;
  }

  .footer-links a:hover {
    color: #60a5fa;
  }

  .footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 24px 0;
    text-align: center;
    font-size: 13px;
    color: #64748b;
  }

  .footer-bottom p + p {
    margin-top: 4px;
  }

  /* ---------- Accessibility ---------- */
  a:focus-visible,
  button:focus-visible,
  input:focus-visible {
    outline: 3px solid rgba(37, 99, 235, 0.4);
    outline-offset: 2px;
  }

  /* ---------- Responsive ---------- */
  @media (max-width: 1024px) {
    .header-inner {
      height: 64px;
    }
    .search-box {
      display: none;
    }
    .main-nav {
      gap: 2px;
    }
    .nav-link {
      padding: 8px 10px;
      font-size: 14px;
    }
    .btn-ghost {
      display: none;
    }
    .grid-3 {
      gap: 16px;
    }
    .steps-grid {
      grid-template-columns: repeat(2, 1fr);
    }
    .post-list {
      grid-template-columns: 1fr;
    }
    .hero {
      padding: 100px 0 80px;
    }
    .hero-title {
      font-size: 38px;
    }
  }

  @media (max-width: 768px) {
    .section {
      padding: 60px 0;
    }
    .section-head h2 {
      font-size: 28px;
    }
    .main-nav {
      display: none;
    }
    .header-actions .btn-primary {
      display: none;
    }
    .menu-toggle {
      display: flex;
    }
    .grid-3 {
      grid-template-columns: 1fr;
    }
    .hero-stats {
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
    }
    .hero-title {
      font-size: 32px;
    }
    .footer-grid {
      grid-template-columns: 1fr;
      gap: 32px;
    }
    .post-card {
      flex-direction: column;
    }
    .post-thumb {
      width: 100%;
      height: 180px;
    }
    .steps-grid {
      grid-template-columns: 1fr;
    }
    .cta-inner h2 {
      font-size: 28px;
    }
  }

  @media (max-width: 520px) {
    .hero {
      padding: 80px 0 60px;
    }
    .hero-title {
      font-size: 28px;
    }
    .hero-subtitle {
      font-size: 15px;
    }
    .hero-buttons .btn {
      width: 100%;
    }
    .hero-stats {
      grid-template-columns: repeat(2, 1fr);
    }
    .stat strong {
      font-size: 22px;
    }
    .section-head h2 {
      font-size: 24px;
    }
    .faq-item summary {
      font-size: 15px;
      padding: 16px 18px;
    }
    .faq-item .faq-body {
      padding: 0 18px 16px;
    }
  }

/* roulang page: article */
:root {
            --primary: #1a2e4d;
            --primary-light: #2c4a75;
            --accent: #f59e0b;
            --accent-hover: #d97706;
            --bg-base: #f8fafc;
            --text-main: #1e293b;
            --text-weak: #64748b;
            --border-soft: #e2e8f0;
            --radius-lg: 18px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-soft: 0 8px 30px rgba(0, 0, 0, 0.06);
            --shadow-card: 0 2px 18px rgba(0, 0, 0, 0.05);
            --shadow-hover: 0 16px 40px rgba(26, 46, 77, 0.12);
            --container-w: 1200px;
        }

        * { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body { font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif; background: var(--bg-base); color: var(--text-main); line-height: 1.75; }
        img { max-width: 100%; height: auto; display: block; }
        a { text-decoration: none; color: inherit; transition: color .2s; }
        button { cursor: pointer; border: none; background: none; font-family: inherit; }
        input, textarea { font-family: inherit; outline: none; }

        .container-custom { max-width: var(--container-w); margin: 0 auto; padding: 0 24px; }
        .site-header { position: sticky; top: 0; z-index: 100; background: rgba(255, 255, 255, .92); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); border-bottom: 1px solid var(--border-soft); box-shadow: 0 1px 10px rgba(0, 0, 0, .04); }
        .header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; gap: 16px; }
        .logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
        .logo-icon { width: 40px; height: 40px; border-radius: 12px; background: linear-gradient(135deg, var(--primary), var(--primary-light)); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 18px; font-weight: 700; box-shadow: 0 4px 14px rgba(26, 46, 77, .3); }
        .logo-text { font-size: 18px; font-weight: 700; color: var(--primary); white-space: nowrap; }
        .logo-text .logo-highlight { color: var(--accent); }
        .main-nav { display: flex; gap: 8px; align-items: center; }
        .nav-link { padding: 8px 16px; font-size: 14px; font-weight: 500; border-radius: 999px; color: var(--text-main); transition: all .2s; }
        .nav-link:hover { background: var(--bg-base); color: var(--primary); }
        .nav-link.active { background: var(--primary); color: #fff; }
        .header-actions { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
        .search-box { display: flex; align-items: center; background: var(--bg-base); border: 1px solid var(--border-soft); border-radius: 999px; padding: 4px 8px 4px 14px; }
        .search-box input { border: none; background: transparent; font-size: 13px; width: 140px; color: var(--text-main); }
        .search-box button { color: var(--text-weak); font-size: 14px; padding: 6px 10px; border-radius: 50%; }
        .search-box button:hover { background: #edf2f7; color: var(--primary); }
        .btn-primary { display: inline-flex; align-items: center; gap: 8px; background: linear-gradient(135deg, var(--accent), #f59e0b); color: #fff; font-weight: 600; font-size: 14px; padding: 9px 22px; border-radius: 999px; box-shadow: 0 6px 16px rgba(245, 158, 11, .3); transition: all .25s; }
        .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 22px rgba(245, 158, 11, .4); }
        .btn-primary:active { transform: translateY(0); }
        .btn-outline { display: inline-flex; align-items: center; gap: 8px; border: 1.5px solid var(--primary); color: var(--primary); font-weight: 600; font-size: 14px; padding: 8px 22px; border-radius: 999px; transition: all .25s; }
        .btn-outline:hover { background: var(--primary); color: #fff; }
        .mobile-toggle { display: none; width: 40px; height: 40px; border-radius: 10px; align-items: center; justify-content: center; font-size: 18px; background: var(--bg-base); border: 1px solid var(--border-soft); }

        .article-hero { position: relative; padding: 48px 0 64px; background-image: url('/assets/images/backpic/back-1.png'); background-size: cover; background-position: center; }
        .article-hero::before { content: ''; position: absolute; inset: 0; background: linear-gradient(120deg, rgba(15, 23, 42, .82), rgba(26, 46, 77, .55)); }
        .article-hero .container-custom { position: relative; z-index: 2; }
        .breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 13px; color: #cbd5e1; margin-bottom: 28px; flex-wrap: wrap; }
        .breadcrumb a { color: #e2e8f0; transition: color .2s; }
        .breadcrumb a:hover { color: var(--accent); }
        .breadcrumb i { font-size: 11px; color: #94a3b8; }
        .hero-page-title { font-size: 34px; font-weight: 800; color: #fff; line-height: 1.3; margin-top: 16px; }
        .hero-page-meta { display: flex; gap: 20px; color: #e2e8f0; font-size: 13px; margin-top: 16px; flex-wrap: wrap; }
        .hero-page-meta i { color: var(--accent); margin-right: 5px; }

        .article-main-wrap { padding: 48px 0 64px; }
        .article-grid { display: grid; grid-template-columns: 1fr 340px; gap: 44px; align-items: start; }
        .article-card-main { background: #fff; border: 1px solid var(--border-soft); border-radius: var(--radius-lg); padding: 40px; box-shadow: var(--shadow-card); }
        .article-thumb img { width: 100%; border-radius: var(--radius-md); margin-bottom: 28px; aspect-ratio: 16/8; object-fit: cover; }
        .article-content-body { font-size: 15px; color: #334155; line-height: 1.9; }
        .article-content-body h2 { font-size: 22px; font-weight: 700; color: var(--primary); margin: 32px 0 16px; line-height: 1.4; }
        .article-content-body h3 { font-size: 18px; font-weight: 700; color: var(--primary); margin: 26px 0 14px; }
        .article-content-body p { margin-bottom: 16px; }
        .article-content-body ul, .article-content-body ol { margin: 0 0 16px 24px; }
        .article-content-body li { margin-bottom: 8px; }
        .article-content-body img { border-radius: var(--radius-md); margin: 24px 0; }
        .article-content-body a { color: var(--accent); font-weight: 500; text-decoration: underline; }
        .article-content-body a:hover { color: var(--accent-hover); }
        .article-content-body blockquote { border-left: 4px solid var(--accent); background: #fffbeb; padding: 16px 20px; border-radius: 8px; margin: 20px 0; color: #92400e; }
        .article-content-body table { width: 100%; border-collapse: collapse; margin: 20px 0; }
        .article-content-body th, .article-content-body td { border: 1px solid var(--border-soft); padding: 10px 14px; text-align: left; }
        .article-content-body th { background: var(--bg-base); font-weight: 600; }

        .sidebar-plug { display: flex; flex-direction: column; gap: 28px; position: sticky; top: 100px; }
        .sidebar-box { background: #fff; border-radius: var(--radius-lg); border: 1px solid var(--border-soft); padding: 24px; box-shadow: var(--shadow-card); }
        .sidebar-box-title { font-size: 16px; font-weight: 700; color: var(--primary); margin-bottom: 16px; display: flex; align-items: center; gap: 8px; }
        .sidebar-box-title i { color: var(--accent); }
        .sidebar-list { list-style: none; }
        .sidebar-list li { border-bottom: 1px solid #f1f5f9; padding: 10px 0; }
        .sidebar-list li:last-child { border-bottom: none; }
        .sidebar-list a { display: flex; align-items: flex-start; gap: 10px; font-size: 13px; color: var(--text-main); line-height: 1.5; transition: color .2s; }
        .sidebar-list a:hover { color: var(--accent); }
        .sidebar-list a i { color: var(--accent); font-size: 12px; margin-top: 4px; }
        .cate-tag-list { display: flex; flex-direction: column; gap: 10px; }
        .cate-tag-item { display: flex; align-items: center; gap: 10px; padding: 10px 14px; background: var(--bg-base); border: 1px solid var(--border-soft); border-radius: var(--radius-sm); font-size: 13px; font-weight: 500; transition: all .2s; }
        .cate-tag-item:hover { background: var(--primary); color: #fff; transform: translateX(4px); }
        .cate-tag-item i { width: 16px; text-align: center; color: var(--accent); }

        .related-section { padding: 48px 0 64px; background: #fff; border-top: 1px solid var(--border-soft); }
        .section-title-wrap { display: flex; align-items: flex-end; justify-content: space-between; margin-bottom: 32px; }
        .section-title { font-size: 28px; font-weight: 800; color: var(--primary); line-height: 1.3; }
        .section-subtitle { color: var(--text-weak); font-size: 14px; margin-top: 4px; }
        .related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
        .post-card { background: var(--bg-base); border: 1px solid var(--border-soft); border-radius: var(--radius-lg); overflow: hidden; transition: all .3s; height: 100%; }
        .post-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); border-color: transparent; }
        .post-card-img { aspect-ratio: 16/10; overflow: hidden; }
        .post-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
        .post-card:hover .post-card-img img { transform: scale(1.05); }
        .post-card-body { padding: 18px 20px 20px; }
        .post-card-cate { display: inline-block; font-size: 11px; font-weight: 600; color: var(--accent); background: #fffbeb; padding: 3px 12px; border-radius: 999px; margin-bottom: 10px; }
        .post-card-title { font-size: 16px; font-weight: 700; color: var(--text-main); line-height: 1.5; margin-bottom: 8px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .post-card-title:hover { color: var(--accent); }
        .post-card-meta { display: flex; gap: 14px; font-size: 12px; color: var(--text-weak); }

        .cta-section { position: relative; padding: 72px 0; background-image: url('/assets/images/backpic/back-2.png'); background-size: cover; background-position: center; }
        .cta-section::before { content: ''; position: absolute; inset: 0; background: linear-gradient(100deg, rgba(26, 46, 77, .92), rgba(26, 46, 77, .68)); }
        .cta-section .container-custom { position: relative; z-index: 2; }
        .cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 40px; flex-wrap: wrap; }
        .cta-left h2 { font-size: 32px; font-weight: 800; color: #fff; line-height: 1.3; }
        .cta-left p { color: #cbd5e1; margin-top: 10px; font-size: 15px; max-width: 560px; }
        .cta-right { display: flex; gap: 16px; flex-shrink: 0; flex-wrap: wrap; }

        .faq-section { padding: 72px 0; background: var(--bg-base); }
        .faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 36px; }
        .faq-item { background: #fff; border: 1px solid var(--border-soft); border-radius: var(--radius-md); padding: 22px 24px; transition: box-shadow .25s; }
        .faq-item:hover { box-shadow: var(--shadow-soft); }
        .faq-item h3 { font-size: 15px; font-weight: 700; color: var(--primary); margin-bottom: 8px; display: flex; align-items: center; gap: 10px; }
        .faq-item h3 i { color: var(--accent); font-size: 14px; }
        .faq-item p { font-size: 13px; color: var(--text-weak); line-height: 1.7; }

        .not-found-box { text-align: center; padding: 80px 20px; background: #fff; border-radius: var(--radius-lg); border: 1px solid var(--border-soft); box-shadow: var(--shadow-card); }
        .not-found-box i { font-size: 42px; color: var(--accent); margin-bottom: 16px; }
        .not-found-box h1 { font-size: 24px; font-weight: 700; color: var(--primary); margin-bottom: 10px; }
        .not-found-box p { color: var(--text-weak); margin-bottom: 20px; }

        .site-footer { background: #0f172a; color: #94a3b8; padding: 64px 0 24px; }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; }
        .footer-brand .logo { margin-bottom: 16px; }
        .footer-brand .logo-text { color: #fff; }
        .footer-brand p { font-size: 13px; line-height: 1.8; max-width: 360px; }
        .footer-grid h4 { color: #e2e8f0; font-size: 15px; font-weight: 700; margin-bottom: 16px; }
        .footer-links { display: flex; flex-direction: column; gap: 10px; }
        .footer-links a { font-size: 13px; color: #94a3b8; transition: color .2s; }
        .footer-links a:hover { color: var(--accent); }
        .footer-contact p { font-size: 13px; color: #94a3b8; margin-bottom: 8px; }
        .footer-bottom { border-top: 1px solid rgba(255, 255, 255, .1); margin-top: 48px; padding-top: 24px; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: 12px; color: #64748b; }

        .mobile-menu { display: none; }

        @media (max-width: 1024px) {
            .container-custom { padding: 0 20px; }
            .article-grid { grid-template-columns: 1fr; }
            .sidebar-plug { position: static; display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
        }

        @media (max-width: 768px) {
            .header-inner { height: 64px; }
            .main-nav { display: none; }
            .header-actions .search-box { display: none; }
            .mobile-toggle { display: flex; }
            .mobile-menu.open { display: block; position: fixed; top: 64px; left: 0; right: 0; background: #fff; z-index: 99; padding: 20px; border-bottom: 1px solid var(--border-soft); box-shadow: 0 8px 24px rgba(0,0,0,.08); }
            .mobile-menu .main-nav { display: flex; flex-direction: column; align-items: stretch; gap: 8px; }
            .mobile-menu .nav-link { display: block; text-align: left; padding: 12px 16px; border-radius: 10px; }
            .article-hero { padding: 32px 0 40px; }
            .hero-page-title { font-size: 24px; }
            .article-card-main { padding: 24px; }
            .footer-grid { grid-template-columns: 1fr; gap: 32px; }
            .cta-inner { flex-direction: column; text-align: center; }
            .cta-right { justify-content: center; }
            .faq-grid { grid-template-columns: 1fr; }
            .related-grid { grid-template-columns: 1fr; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        @media (max-width: 520px) {
            .container-custom { padding: 0 16px; }
            .logo-text { font-size: 16px; }
            .btn-primary { padding: 8px 16px; font-size: 13px; }
            .article-card-main { padding: 20px; }
            .hero-page-title { font-size: 20px; }
            .section-title { font-size: 22px; }
            .footer-bottom p { font-size: 11px; }
            .article-content-body { font-size: 14px; }
        }

        @media (max-width: 1024px) and (min-width: 769px) {
            .sidebar-plug { grid-template-columns: 1fr 1fr; }
        }

/* roulang page: category2 */
:root {
      --brand: #1f6fe3;
      --brand-deep: #1a5ad0;
      --brand-dark: #1b3f85;
      --brand-light: #d9eefe;
      --accent: #f59e0b;
      --text-main: #1e293b;
      --text-muted: #64748b;
      --text-light: #94a3b8;
      --border-color: #e2e8f0;
      --bg-light: #f8fafc;
      --bg-dark: #0f172a;
      --radius-lg: 1rem;
      --radius-xl: 1.25rem;
      --shadow-card: 0 4px 24px rgba(15, 23, 42, 0.06), 0 2px 8px rgba(15, 23, 42, 0.04);
      --shadow-hover: 0 12px 40px rgba(15, 23, 42, 0.12), 0 4px 12px rgba(15, 23, 42, 0.06);
    }

    *,
    *::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;
      color: #1e293b;
      background-color: #ffffff;
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

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

    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.2s ease;
    }

    button,
    input {
      font-family: inherit;
    }

    .container-custom {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding-left: 1.25rem;
      padding-right: 1.25rem;
    }

    @media (max-width: 640px) {
      .container-custom {
        padding-left: 1rem;
        padding-right: 1rem;
      }
    }

    /* Header */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
    }

    .site-header .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
      gap: 1rem;
    }

    .site-logo {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      font-weight: 700;
      font-size: 1.25rem;
      color: var(--text-main);
      white-space: nowrap;
    }

    .site-logo .logo-icon {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 36px;
      height: 36px;
      border-radius: 10px;
      background: linear-gradient(135deg, var(--brand), var(--brand-deep));
      color: #fff;
      font-size: 18px;
      font-weight: 700;
    }

    .site-logo .logo-text {
      font-weight: 700;
    }

    .site-logo .logo-highlight {
      color: var(--brand);
    }

    .main-nav {
      display: flex;
      align-items: center;
      gap: 0.75rem;
    }

    .nav-link {
      display: inline-block;
      padding: 0.5rem 0.75rem;
      font-size: 0.9rem;
      font-weight: 500;
      color: var(--text-muted);
      border-radius: 8px;
      transition: all 0.2s ease;
      white-space: nowrap;
    }

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

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

    .header-actions {
      display: flex;
      align-items: center;
      gap: 0.75rem;
    }

    .header-search {
      display: flex;
      align-items: center;
      background: var(--bg-light);
      border: 1px solid var(--border-color);
      border-radius: 8px;
      padding: 0.35rem 0.6rem;
      gap: 0.4rem;
    }

    .header-search input {
      border: none;
      outline: none;
      background: transparent;
      font-size: 0.85rem;
      width: 140px;
      color: var(--text-main);
    }

    .header-search i {
      color: var(--text-light);
      font-size: 0.8rem;
    }

    .btn-login {
      font-size: 0.85rem;
      font-weight: 500;
      color: var(--text-main);
      padding: 0.4rem 0.75rem;
      border-radius: 8px;
      border: 1px solid var(--border-color);
      transition: all 0.2s ease;
      background: #fff;
      cursor: pointer;
    }

    .btn-login:hover {
      border-color: var(--brand);
      color: var(--brand);
    }

    .btn-primary {
      display: inline-flex;
      align-items: center;
      gap: 0.4rem;
      background: linear-gradient(135deg, var(--brand), var(--brand-deep));
      color: #fff;
      font-weight: 600;
      font-size: 0.85rem;
      padding: 0.5rem 1rem;
      border-radius: 8px;
      border: none;
      cursor: pointer;
      transition: all 0.25s ease;
      box-shadow: 0 2px 8px rgba(31, 111, 227, 0.3);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 16px rgba(31, 111, 227, 0.4);
    }

    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.4rem;
      cursor: pointer;
      color: var(--text-main);
      padding: 0.4rem;
    }

    @media (max-width: 1024px) {
      .main-nav {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #fff;
        border-bottom: 1px solid var(--border-color);
        padding: 1rem;
        flex-direction: column;
        align-items: flex-start;
        gap: 0.25rem;
        box-shadow: 0 12px 24px rgba(15, 23, 42, 0.08);
      }

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

      .nav-link {
        width: 100%;
        padding: 0.7rem 0.75rem;
        font-size: 0.95rem;
      }

      .mobile-toggle {
        display: block;
      }

      .header-search {
        display: none;
      }
    }

    @media (max-width: 640px) {
      .site-header .header-inner {
        height: 64px;
      }

      .site-logo {
        font-size: 1.05rem;
      }

      .site-logo .logo-icon {
        width: 32px;
        height: 32px;
        font-size: 16px;
      }

      .btn-login {
        display: none;
      }

      .btn-primary {
        padding: 0.4rem 0.7rem;
        font-size: 0.8rem;
      }

      .header-actions {
        gap: 0.5rem;
      }
    }

    /* Hero / Banner */
    .page-banner {
      position: relative;
      background: linear-gradient(135deg, #0f172a 0%, #1a2a4f 60%, #1b3f85 100%);
      padding: 5rem 0 4.5rem;
      overflow: hidden;
    }

    .page-banner::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background-image: url('/assets/images/backpic/back-2.png');
      background-size: cover;
      background-position: center;
      opacity: 0.18;
    }

    .page-banner .banner-content {
      position: relative;
      z-index: 2;
    }

    .banner-badge {
      display: inline-flex;
      align-items: center;
      gap: 0.4rem;
      background: rgba(255, 255, 255, 0.12);
      border: 1px solid rgba(255, 255, 255, 0.2);
      color: #d9eefe;
      font-size: 0.8rem;
      font-weight: 500;
      padding: 0.3rem 0.9rem;
      border-radius: 999px;
      margin-bottom: 1.25rem;
      backdrop-filter: blur(4px);
    }

    .banner-badge i {
      color: #fbbf24;
    }

    .page-banner h1 {
      color: #fff;
      font-size: 2.6rem;
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 1rem;
      letter-spacing: -0.01em;
    }

    .page-banner h1 span {
      color: #fbbf24;
    }

    .page-banner .banner-desc {
      color: rgba(255, 255, 255, 0.82);
      font-size: 1.05rem;
      max-width: 680px;
      line-height: 1.7;
      margin-bottom: 2rem;
    }

    .banner-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 0.5rem;
    }

    .banner-tags span {
      background: rgba(255, 255, 255, 0.1);
      border: 1px solid rgba(255, 255, 255, 0.16);
      color: rgba(255, 255, 255, 0.88);
      font-size: 0.82rem;
      padding: 0.35rem 0.8rem;
      border-radius: 6px;
      backdrop-filter: blur(4px);
    }

    @media (max-width: 768px) {
      .page-banner {
        padding: 3.5rem 0 3rem;
      }

      .page-banner h1 {
        font-size: 1.9rem;
      }

      .page-banner .banner-desc {
        font-size: 0.95rem;
      }
    }

    @media (max-width: 520px) {
      .page-banner h1 {
        font-size: 1.6rem;
      }

      .banner-tags span {
        font-size: 0.75rem;
        padding: 0.25rem 0.6rem;
      }
    }

    /* Section base */
    .section {
      padding: 5rem 0;
    }

    .section-sm {
      padding: 3.5rem 0;
    }

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

    .section-header {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 3rem;
    }

    .section-header .section-tag {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 600;
      color: var(--brand);
      background: var(--brand-light);
      padding: 0.3rem 0.9rem;
      border-radius: 999px;
      margin-bottom: 0.8rem;
    }

    .section-header h2 {
      font-size: 2rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.25;
      margin-bottom: 0.75rem;
      letter-spacing: -0.01em;
    }

    .section-header p {
      color: var(--text-muted);
      font-size: 1rem;
      line-height: 1.7;
    }

    @media (max-width: 768px) {
      .section {
        padding: 3.5rem 0;
      }

      .section-header h2 {
        font-size: 1.6rem;
      }
    }

    /* Data highlight cards */
    .data-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
      margin-bottom: 2rem;
    }

    .data-card {
      background: #fff;
      border-radius: 1rem;
      border: 1px solid var(--border-color);
      padding: 1.75rem 1.5rem;
      text-align: center;
      box-shadow: var(--shadow-card);
      transition: all 0.3s ease;
    }

    .data-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }

    .data-card .data-icon {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 48px;
      height: 48px;
      border-radius: 12px;
      font-size: 20px;
      margin-bottom: 0.75rem;
      background: var(--brand-light);
      color: var(--brand);
    }

    .data-card .data-num {
      font-size: 2rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.2;
    }

    .data-card .data-label {
      font-size: 0.85rem;
      color: var(--text-muted);
      margin-top: 0.25rem;
    }

    @media (max-width: 1024px) {
      .data-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 520px) {
      .data-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
      }
    }

    /* Service cards */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.5rem;
    }

    .service-card {
      background: #fff;
      border-radius: 1.25rem;
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }

    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
      border-color: #bfdbfe;
    }

    .service-card .card-img {
      position: relative;
      overflow: hidden;
      height: 180px;
    }

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

    .service-card:hover .card-img img {
      transform: scale(1.05);
    }

    .service-card .card-img::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      height: 30%;
      background: linear-gradient(to top, rgba(15, 23, 42, 0.25), transparent);
    }

    .service-card .card-body {
      padding: 1.5rem;
      flex: 1;
      display: flex;
      flex-direction: column;
      gap: 0.75rem;
    }

    .service-card .card-badge {
      font-size: 0.72rem;
      font-weight: 600;
      color: var(--brand);
      background: var(--brand-light);
      padding: 0.2rem 0.6rem;
      border-radius: 999px;
      align-self: flex-start;
    }

    .service-card h3 {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.4;
    }

    .service-card .card-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.65;
      flex: 1;
    }

    .card-link {
      display: inline-flex;
      align-items: center;
      gap: 0.3rem;
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--brand);
      transition: all 0.2s ease;
    }

    .card-link:hover {
      color: var(--brand-deep);
      gap: 0.5rem;
    }

    @media (max-width: 1024px) {
      .service-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 640px) {
      .service-grid {
        grid-template-columns: 1fr;
      }
    }

    /* Content list */
    .content-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.5rem;
    }

    .content-card {
      background: #fff;
      border-radius: 1.25rem;
      border: 1px solid var(--border-color);
      padding: 1.75rem;
      box-shadow: var(--shadow-card);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
      gap: 0.75rem;
    }

    .content-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }

    .content-card .content-meta {
      display: flex;
      align-items: center;
      gap: 0.6rem;
      font-size: 0.78rem;
      color: var(--text-light);
    }

    .content-card h3 {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.5;
    }

    .content-card p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.65;
      flex: 1;
    }

    @media (max-width: 1024px) {
      .content-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 640px) {
      .content-grid {
        grid-template-columns: 1fr;
      }
    }

    /* Steps */
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
    }

    .step-item {
      text-align: center;
      padding: 2rem 1.25rem;
      background: #fff;
      border-radius: 1.25rem;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-card);
      position: relative;
      transition: all 0.3s ease;
    }

    .step-item:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }

    .step-item .step-num {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 56px;
      height: 56px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--brand), var(--brand-deep));
      color: #fff;
      font-size: 1.4rem;
      font-weight: 800;
      margin-bottom: 1rem;
      box-shadow: 0 4px 12px rgba(31, 111, 227, 0.35);
    }

    .step-item h3 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 0.5rem;
    }

    .step-item p {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    @media (max-width: 1024px) {
      .steps-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

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

    /* FAQ */
    .faq-wrap {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 1rem;
    }

    .faq-item {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: 1rem;
      padding: 1.5rem 1.75rem;
      box-shadow: var(--shadow-card);
      transition: all 0.3s ease;
    }

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

    .faq-item h3 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 0.5rem;
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }

    .faq-item h3::before {
      content: '';
      width: 4px;
      height: 18px;
      border-radius: 2px;
      background: var(--brand);
      flex-shrink: 0;
    }

    .faq-item p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.7;
      padding-left: 0.9rem;
    }

    @media (max-width: 640px) {
      .faq-item {
        padding: 1.2rem 1.25rem;
      }

      .faq-item h3 {
        font-size: 0.93rem;
      }
    }

    /* CTA */
    .cta-band {
      background: linear-gradient(135deg, #0f172a 0%, #1a2a4f 50%, #1b3f85 100%);
      padding: 4.5rem 0;
      position: relative;
      overflow: hidden;
    }

    .cta-band::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background-image: url('/assets/images/backpic/back-3.png');
      background-size: cover;
      background-position: center;
      opacity: 0.12;
    }

    .cta-inner {
      position: relative;
      z-index: 2;
      text-align: center;
      max-width: 760px;
      margin: 0 auto;
    }

    .cta-inner h2 {
      color: #fff;
      font-size: 2rem;
      font-weight: 800;
      margin-bottom: 1rem;
      line-height: 1.3;
    }

    .cta-inner p {
      color: rgba(255, 255, 255, 0.8);
      font-size: 1.05rem;
      margin-bottom: 2rem;
      line-height: 1.7;
    }

    .cta-buttons {
      display: flex;
      gap: 1rem;
      justify-content: center;
      flex-wrap: wrap;
    }

    .btn-cta {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      background: #f59e0b;
      color: #0f172a;
      font-weight: 700;
      font-size: 1rem;
      padding: 0.9rem 2rem;
      border-radius: 999px;
      border: none;
      cursor: pointer;
      transition: all 0.3s ease;
      box-shadow: 0 4px 20px rgba(245, 158, 11, 0.4);
    }

    .btn-cta:hover {
      transform: translateY(-3px);
      box-shadow: 0 8px 28px rgba(245, 158, 11, 0.5);
      background: #fbbf24;
    }

    .btn-ghost {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      background: rgba(255, 255, 255, 0.1);
      border: 1px solid rgba(255, 255, 255, 0.3);
      color: #fff;
      font-weight: 600;
      font-size: 1rem;
      padding: 0.9rem 2rem;
      border-radius: 999px;
      cursor: pointer;
      transition: all 0.3s ease;
    }

    .btn-ghost:hover {
      background: rgba(255, 255, 255, 0.2);
      transform: translateY(-3px);
    }

    @media (max-width: 640px) {
      .cta-band {
        padding: 3.5rem 0;
      }

      .cta-inner h2 {
        font-size: 1.5rem;
      }

      .cta-inner p {
        font-size: 0.93rem;
      }

      .btn-cta,
      .btn-ghost {
        font-size: 0.9rem;
        padding: 0.75rem 1.6rem;
      }
    }

    /* Footer */
    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      font-size: 0.9rem;
      padding-top: 4rem;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr;
      gap: 2.5rem;
      padding-bottom: 3rem;
    }

    .footer-brand .logo {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      margin-bottom: 1.25rem;
    }

    .footer-brand .logo-icon {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 36px;
      height: 36px;
      border-radius: 10px;
      background: linear-gradient(135deg, #1f6fe3, #1a5ad0);
      color: #fff;
      font-size: 18px;
      font-weight: 700;
    }

    .footer-brand .logo-text {
      color: #fff;
      font-weight: 700;
      font-size: 1.2rem;
    }

    .footer-brand .logo-highlight {
      color: #fbbf24;
    }

    .footer-brand p {
      line-height: 1.7;
      color: #94a3b8;
      max-width: 380px;
    }

    .footer-grid h4 {
      color: #fff;
      font-size: 1rem;
      font-weight: 600;
      margin-bottom: 1.25rem;
    }

    .footer-links {
      display: flex;
      flex-direction: column;
      gap: 0.65rem;
    }

    .footer-links a {
      color: #94a3b8;
      transition: color 0.2s ease;
      font-size: 0.9rem;
    }

    .footer-links a:hover {
      color: #fbbf24;
    }

    .footer-contact {
      display: flex;
      flex-direction: column;
      gap: 0.65rem;
    }

    .footer-contact p {
      color: #94a3b8;
      font-size: 0.9rem;
      line-height: 1.6;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding: 1.5rem 0;
      text-align: center;
      color: #64748b;
      font-size: 0.82rem;
      display: flex;
      flex-direction: column;
      gap: 0.35rem;
    }

    @media (max-width: 768px) {
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
      }
    }

    /* Extra utility */
    .text-gradient {
      background: linear-gradient(120deg, #1f6fe3, #1b3f85);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .btn-outline {
      display: inline-flex;
      align-items: center;
      gap: 0.4rem;
      background: #fff;
      color: var(--brand);
      border: 1.5px solid var(--brand);
      font-weight: 600;
      font-size: 0.9rem;
      padding: 0.6rem 1.2rem;
      border-radius: 8px;
      cursor: pointer;
      transition: all 0.25s ease;
    }

    .btn-outline:hover {
      background: var(--brand-light);
      transform: translateY(-2px);
    }

    focus-visible {
      outline: 2px solid var(--brand);
      outline-offset: 2px;
    }

    .nav-link:focus-visible,
    .btn-primary:focus-visible,
    .btn-outline:focus-visible,
    .btn-cta:focus-visible,
    .btn-ghost:focus-visible,
    .btn-login:focus-visible,
    .mobile-toggle:focus-visible {
      outline: 2px solid var(--brand);
      outline-offset: 2px;
    }

/* roulang page: category1 */
:root {
    --brand-50: #f0f5ff;
    --brand-100: #e1ebf7;
    --brand-600: #0b2e6b;
    --brand-700: #08224f;
    --brand-800: #061a3d;
    --brand-900: #04102a;
    --accent-100: #ffedd5;
    --accent-500: #f97316;
    --accent-600: #ea580c;
    --bg-body: #f8fafc;
    --text-main: #1e293b;
    --text-weak: #64748b;
    --border: #e2e8f0;
    --radius: 16px;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    --shadow-hover: 0 16px 40px rgba(0, 0, 0, 0.10);
  }

  * {
    box-sizing: border-box;
  }

  html {
    scroll-behavior: smooth;
  }

  body {
    margin: 0;
    font-family: 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
    background: var(--bg-body);
    color: var(--text-main);
    line-height: 1.7;
  }

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

  a {
    text-decoration: none;
    color: inherit;
    transition: color .2s ease;
  }

  input,
  button {
    font-family: inherit;
  }

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

  .section {
    padding: 88px 0;
  }

  .section-head {
    text-align: center;
    max-width: 680px;
    margin: 0 auto 52px;
  }

  .section-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    border-radius: 999px;
    background: var(--brand-50);
    color: var(--brand-700);
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.02em;
    margin-bottom: 14px;
  }

  .section-head h2 {
    font-size: 32px;
    font-weight: 800;
    color: var(--brand-800);
    line-height: 1.3;
    margin: 0 0 14px;
  }

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

  @media (max-width: 768px) {
    .section {
      padding: 64px 0;
    }
    .section-head h2 {
      font-size: 26px;
    }
  }

  @media (max-width: 520px) {
    .section-head h2 {
      font-size: 22px;
    }
    .section-head p {
      font-size: 15px;
    }
  }

  .site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: #ffffff;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 1px 8px rgba(0, 0, 0, 0.04);
  }

  .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    height: 72px;
    position: relative;
  }

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

  .logo-icon {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--brand-600), var(--brand-900));
    color: #fff;
    font-weight: 800;
    font-size: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 6px 14px rgba(11, 46, 107, 0.25);
  }

  .logo-text {
    font-weight: 800;
    font-size: 18px;
    color: var(--brand-800);
    white-space: nowrap;
  }

  .logo-highlight {
    color: var(--accent-500);
  }

  .main-nav {
    display: flex;
    align-items: center;
    gap: 6px;
  }

  .nav-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 16px;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-main);
    white-space: nowrap;
    transition: color .2s, background .2s, box-shadow .2s;
  }

  .nav-link:hover {
    color: var(--brand-700);
    background: var(--brand-50);
  }

  .nav-link.active {
    color: var(--brand-700);
    background: var(--brand-100);
    font-weight: 600;
  }

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

  .header-search {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--bg-body);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 8px 16px;
    width: 200px;
    transition: border-color .2s, box-shadow .2s;
  }

  .header-search:focus-within {
    border-color: var(--brand-600);
    box-shadow: 0 0 0 3px rgba(11, 46, 107, 0.10);
  }

  .header-search input {
    border: none;
    outline: none;
    background: transparent;
    width: 100%;
    font-size: 14px;
    color: var(--text-main);
  }

  .header-search i {
    font-size: 14px;
    color: var(--text-weak);
  }

  .btn-header {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 22px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--accent-500), var(--accent-600));
    color: #fff;
    font-weight: 600;
    font-size: 14px;
    box-shadow: 0 6px 16px rgba(249, 115, 22, 0.25);
    transition: transform .2s, box-shadow .2s;
    white-space: nowrap;
  }

  .btn-header:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 24px rgba(249, 115, 22, 0.35);
  }

  .nav-toggle {
    display: none;
    background: none;
    border: none;
    width: 44px;
    height: 44px;
    border-radius: 10px;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 5px;
  }

  .nav-toggle .bar {
    display: block;
    width: 20px;
    height: 2px;
    border-radius: 2px;
    background: var(--brand-800);
    transition: transform .25s, opacity .25s;
  }

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

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

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

  @media (max-width: 1024px) {
    .header-search {
      display: none;
    }
    .main-nav {
      gap: 2px;
    }
    .nav-link {
      padding: 9px 12px;
      font-size: 13px;
    }
  }

  @media (max-width: 768px) {
    .main-nav {
      display: none;
      position: absolute;
      top: 72px;
      left: 0;
      right: 0;
      background: #fff;
      border-bottom: 1px solid var(--border);
      flex-direction: column;
      align-items: stretch;
      padding: 12px 20px 20px;
      gap: 4px;
      box-shadow: 0 16px 32px rgba(0, 0, 0, 0.08);
    }
    .main-nav.open {
      display: flex;
    }
    .nav-link {
      padding: 13px 16px;
      font-size: 15px;
      border-radius: 10px;
    }
    .nav-toggle {
      display: inline-flex;
    }
    .btn-header {
      padding: 9px 16px;
      font-size: 13px;
    }
    .logo-text {
      font-size: 16px;
    }
  }

  .page-hero {
    background-size: cover;
    background-position: center;
    color: #fff;
    padding: 96px 0;
    position: relative;
  }

  .page-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(120deg, rgba(4, 16, 42, 0.92), rgba(11, 46, 107, 0.78), rgba(4, 16, 42, 0.45));
  }

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

  .breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.75);
    margin-bottom: 22px;
  }

  .breadcrumb a {
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
  }

  .breadcrumb a:hover {
    color: #fff;
  }

  .breadcrumb i {
    font-size: 11px;
  }

  .hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.20);
    backdrop-filter: blur(6px);
    padding: 7px 18px;
    border-radius: 999px;
    font-size: 14px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 20px;
  }

  .hero-badge i {
    color: var(--accent-400);
  }

  .page-hero h1 {
    font-size: 46px;
    font-weight: 800;
    line-height: 1.25;
    margin: 0 0 18px;
    letter-spacing: -0.01em;
  }

  .hero-desc {
    font-size: 17px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.85);
    max-width: 640px;
    margin: 0 0 32px;
  }

  .hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-bottom: 44px;
  }

  .btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 13px 26px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--accent-500), var(--accent-600));
    color: #fff;
    font-weight: 600;
    font-size: 15px;
    box-shadow: 0 8px 20px rgba(249, 115, 22, 0.30);
    transition: transform .2s, box-shadow .2s;
  }

  .btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 28px rgba(249, 115, 22, 0.40);
  }

  .btn-ghost {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 13px 26px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.10);
    border: 1px solid rgba(255, 255, 255, 0.30);
    color: #fff;
    font-weight: 500;
    font-size: 15px;
    transition: background .2s, transform .2s;
  }

  .btn-ghost:hover {
    background: rgba(255, 255, 255, 0.20);
    transform: translateY(-3px);
  }

  .hero-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 28px;
  }

  .hero-stat {
    display: flex;
    flex-direction: column;
    gap: 2px;
  }

  .hero-stat strong {
    font-size: 30px;
    font-weight: 800;
    color: #fff;
    line-height: 1.2;
  }

  .hero-stat span {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.70);
  }

  @media (max-width: 768px) {
    .page-hero {
      padding: 70px 0;
    }
    .page-hero h1 {
      font-size: 32px;
    }
    .hero-desc {
      font-size: 16px;
    }
    .hero-stats {
      gap: 20px;
    }
    .hero-stat strong {
      font-size: 24px;
    }
  }

  @media (max-width: 520px) {
    .page-hero h1 {
      font-size: 27px;
    }
    .hero-desc {
      font-size: 15px;
    }
    .hero-actions .btn-primary,
    .hero-actions .btn-ghost {
      width: 100%;
      justify-content: center;
    }
  }

  .feature-strip {
    padding: 0;
    margin-top: -40px;
    position: relative;
    z-index: 5;
  }

  .feature-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
  }

  .feature-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    display: flex;
    gap: 14px;
    align-items: flex-start;
    transition: transform .25s, box-shadow .25s;
  }

  .feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
  }

  .feature-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: var(--brand-50);
    color: var(--brand-700);
    font-size: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
  }

  .feature-card h3 {
    font-size: 16px;
    font-weight: 700;
    color: var(--brand-800);
    margin: 0 0 6px;
  }

  .feature-card p {
    font-size: 14px;
    color: var(--text-weak);
    line-height: 1.65;
    margin: 0;
  }

  @media (max-width: 1024px) {
    .feature-grid {
      grid-template-columns: repeat(2, 1fr);
    }
  }

  @media (max-width: 520px) {
    .feature-grid {
      grid-template-columns: 1fr;
    }
    .feature-card {
      padding: 18px;
    }
  }

  .steps-section {
    background: #fff;
  }

  .steps-wrapper {
    position: relative;
    max-width: 720px;
    margin: 0 auto;
    padding-left: 28px;
    border-left: 3px solid var(--brand-100);
  }

  .step-item {
    position: relative;
    padding-bottom: 48px;
  }

  .step-item:last-child {
    padding-bottom: 0;
  }

  .step-item::before {
    content: '';
    position: absolute;
    left: -34px;
    top: 4px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent-500);
    border: 3px solid #fff;
    box-shadow: 0 0 0 3px var(--accent-100);
  }

  .step-inner {
    background: var(--bg-body);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px 26px;
    transition: box-shadow .25s, transform .25s;
  }

  .step-inner:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-3px);
  }

  .step-top {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 10px;
  }

  .step-num {
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 0.05em;
    color: var(--accent-600);
    background: var(--accent-100);
    padding: 4px 12px;
    border-radius: 999px;
  }

  .step-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--brand-800);
    margin: 0;
  }

  .step-desc {
    font-size: 15px;
    color: var(--text-weak);
    line-height: 1.75;
    margin: 0;
  }

  @media (max-width: 520px) {
    .steps-wrapper {
      padding-left: 18px;
    }
    .step-item::before {
      left: -25px;
    }
    .step-inner {
      padding: 18px;
    }
    .step-title {
      font-size: 16px;
    }
    .step-desc {
      font-size: 14px;
    }
  }

  .tips-section {
    background: var(--bg-body);
  }

  .tips-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    max-width: 1000px;
    margin: 0 auto;
  }

  .tip-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 26px;
    box-shadow: var(--shadow);
    transition: transform .25s, box-shadow .25s;
  }

  .tip-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
  }

  .tip-icon {
    width: 46px;
    height: 46px;
    border-radius: 12px;
    background: var(--brand-50);
    color: var(--brand-700);
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
  }

  .tip-card h3 {
    font-size: 16px;
    font-weight: 700;
    color: var(--brand-800);
    margin: 0 0 8px;
  }

  .tip-card p {
    font-size: 14px;
    color: var(--text-weak);
    line-height: 1.7;
    margin: 0;
  }

  @media (max-width: 1024px) {
    .tips-grid {
      grid-template-columns: repeat(2, 1fr);
    }
  }

  @media (max-width: 520px) {
    .tips-grid {
      grid-template-columns: 1fr;
    }
    .tip-card {
      padding: 20px;
    }
  }

  .faq-section {
    background: #fff;
  }

  .faq-wrap {
    max-width: 800px;
    margin: 0 auto;
  }

  .faq-item {
    background: var(--bg-body);
    border: 1px solid var(--border);
    border-radius: 14px;
    margin-bottom: 12px;
    overflow: hidden;
    transition: box-shadow .2s, border-color .2s;
  }

  .faq-item[open] {
    border-color: var(--brand-100);
    box-shadow: var(--shadow);
  }

  .faq-item summary {
    padding: 20px 24px;
    font-size: 16px;
    font-weight: 600;
    color: var(--brand-800);
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    transition: color .2s;
  }

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

  .faq-item summary:hover {
    color: var(--brand-600);
  }

  .faq-item summary i {
    color: var(--accent-500);
    font-size: 14px;
    transition: transform .25s;
  }

  .faq-item[open] summary i {
    transform: rotate(45deg);
  }

  .faq-answer {
    padding: 0 24px 22px;
    font-size: 15px;
    color: var(--text-weak);
    line-height: 1.8;
  }

  @media (max-width: 520px) {
    .faq-item summary {
      padding: 16px 18px;
      font-size: 15px;
    }
    .faq-answer {
      padding: 0 18px 18px;
      font-size: 14px;
    }
  }

  .guides-section {
    background: var(--bg-body);
  }

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

  .guide-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
    transition: transform .25s, box-shadow .25s;
  }

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

  .guide-img {
    position: relative;
    overflow: hidden;
  }

  .guide-img img {
    width: 100%;
    height: 190px;
    object-fit: cover;
    transition: transform .35s;
  }

  .guide-card:hover .guide-img img {
    transform: scale(1.05);
  }

  .guide-tag {
    position: absolute;
    top: 14px;
    left: 14px;
    background: rgba(6, 26, 61, 0.92);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    padding: 5px 12px;
    border-radius: 999px;
    backdrop-filter: blur(4px);
  }

  .guide-body {
    padding: 22px;
  }

  .guide-body h3 {
    font-size: 17px;
    font-weight: 700;
    color: var(--brand-800);
    margin: 0 0 10px;
    line-height: 1.45;
  }

  .guide-body p {
    font-size: 14px;
    color: var(--text-weak);
    line-height: 1.7;
    margin: 0 0 16px;
  }

  .guide-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 600;
    color: var(--accent-600);
  }

  .guide-link:hover {
    gap: 10px;
  }

  @media (max-width: 1024px) {
    .guides-grid {
      grid-template-columns: repeat(2, 1fr);
    }
  }

  @media (max-width: 768px) {
    .guides-grid {
      grid-template-columns: 1fr;
    }
    .guide-img img {
      height: 170px;
    }
  }

  .cta-section {
    background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
    position: relative;
    padding: 80px 0;
  }

  .cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(4, 16, 42, 0.92), rgba(11, 46, 107, 0.88));
  }

  .cta-section .container-custom {
    position: relative;
    z-index: 2;
    text-align: center;
  }

  .cta-section h2 {
    font-size: 32px;
    font-weight: 800;
    color: #fff;
    margin: 0 0 14px;
  }

  .cta-section p {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.80);
    max-width: 600px;
    margin: 0 auto 30px;
    line-height: 1.8;
  }

  .cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 15px 34px;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--accent-500), var(--accent-600));
    color: #fff;
    font-weight: 700;
    font-size: 16px;
    box-shadow: 0 10px 28px rgba(249, 115, 22, 0.35);
    transition: transform .2s, box-shadow .2s;
  }

  .cta-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 14px 36px rgba(249, 115, 22, 0.45);
  }

  @media (max-width: 520px) {
    .cta-section {
      padding: 60px 0;
    }
    .cta-section h2 {
      font-size: 24px;
    }
    .cta-section p {
      font-size: 15px;
    }
    .cta-btn {
      width: 100%;
      justify-content: center;
      padding: 14px 20px;
      font-size: 15px;
    }
  }

  .site-footer {
    background: var(--brand-900);
    color: #94a3b8;
    padding: 64px 0 0;
    margin-top: 0;
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

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

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

  .footer-brand .logo-highlight {
    color: var(--accent-500);
  }

  .footer-brand p {
    font-size: 14px;
    line-height: 1.8;
    color: #94a3b8;
    margin: 0;
    max-width: 360px;
  }

  .site-footer h4 {
    color: #fff;
    font-size: 15px;
    font-weight: 700;
    margin: 0 0 18px;
    letter-spacing: 0.02em;
  }

  .footer-links {
    display: flex;
    flex-direction: column;
    gap: 10px;
  }

  .footer-links a {
    font-size: 14px;
    color: #94a3b8;
    transition: color .2s, padding-left .2s;
  }

  .footer-links a:hover {
    color: #fff;
    padding-left: 4px;
  }

  .footer-contact {
    display: flex;
    flex-direction: column;
    gap: 10px;
  }

  .footer-contact p {
    font-size: 14px;
    color: #94a3b8;
    margin: 0;
  }

  .footer-bottom {
    padding: 22px 0;
    text-align: center;
  }

  .footer-bottom p {
    font-size: 13px;
    color: #64748b;
    margin: 0;
    line-height: 1.7;
  }

  @media (max-width: 768px) {
    .footer-grid {
      grid-template-columns: 1fr;
      gap: 36px;
    }
    .footer-brand p {
      max-width: 100%;
    }
  }

  @media (max-width: 520px) {
    .site-footer {
      padding-top: 48px;
    }
    .footer-bottom p {
      font-size: 12px;
    }
  }

  .focus-ring:focus-visible {
    outline: 2px solid var(--accent-500);
    outline-offset: 2px;
  }

/* roulang page: category3 */
:root {
    --primary: #0f172a;
    --primary-light: #1e293b;
    --accent: #f59e0b;
    --accent-hover: #d97706;
    --accent-2: #ef4444;
    --accent-grad: linear-gradient(135deg, #f59e0b, #ef4444);
    --bg: #f8fafc;
    --bg-dark: #0b1220;
    --bg-card: #ffffff;
    --text-main: #1e293b;
    --text-sub: #64748b;
    --text-on-dark: #f1f5f9;
    --border: #e2e8f0;
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 10px;
    --shadow-sm: 0 4px 16px rgba(2, 6, 23, .05);
    --shadow-card: 0 10px 30px rgba(2, 6, 23, .07);
    --shadow-card-hover: 0 22px 44px rgba(2, 6, 23, .13);
    --shadow-btn: 0 8px 22px rgba(245, 158, 11, .35);
    --transition: .3s ease;
  }

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

  html {
    scroll-behavior: smooth;
  }

  body {
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text-main);
    line-height: 1.65;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
  }

  a {
    color: inherit;
    text-decoration: none;
  }

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

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

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

  /* ===== Header ===== */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(11, 18, 32, .92);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(255, 255, 255, .08);
  }

  .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    height: 74px;
  }

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

  .logo-icon {
    width: 42px;
    height: 42px;
    border-radius: 13px;
    background: var(--accent-grad);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 21px;
    box-shadow: 0 4px 14px rgba(245, 158, 11, .35);
  }

  .logo-text {
    font-size: 21px;
    font-weight: 800;
    color: #fff;
    letter-spacing: .5px;
    white-space: nowrap;
  }

  .logo-highlight {
    color: var(--accent);
  }

  .main-nav {
    display: flex;
    align-items: center;
    gap: 6px;
  }

  .nav-link {
    padding: 8px 16px;
    border-radius: 10px;
    color: rgba(255, 255, 255, .72);
    font-size: 15px;
    font-weight: 500;
    transition: background .2s, color .2s;
    white-space: nowrap;
  }

  .nav-link:hover,
  .nav-link:focus-visible {
    color: #fff;
    background: rgba(255, 255, 255, .07);
    outline: none;
  }

  .nav-link.active {
    color: #fbbf24;
    background: rgba(245, 158, 11, .14);
  }

  .header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
  }

  .search-box {
    display: flex;
    align-items: center;
    background: rgba(255, 255, 255, .08);
    border-radius: 30px;
    padding: 7px 16px;
    gap: 8px;
    border: 1px solid rgba(255, 255, 255, .08);
    transition: border .2s;
  }

  .search-box:focus-within {
    border-color: rgba(245, 158, 11, .5);
  }

  .search-box i {
    color: rgba(255, 255, 255, .5);
    font-size: 14px;
  }

  .search-box input {
    background: transparent;
    border: none;
    outline: none;
    color: #fff;
    width: 130px;
    font-size: 14px;
  }

  .search-box input::placeholder {
    color: rgba(255, 255, 255, .4);
  }

  .menu-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    background: rgba(255, 255, 255, .08);
    border: none;
    border-radius: 10px;
    color: #fff;
    font-size: 18px;
    cursor: pointer;
  }

  /* ===== Buttons ===== */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-weight: 600;
    border-radius: 12px;
    transition: transform .25s, box-shadow .25s, background .25s;
    border: 1px solid transparent;
    cursor: pointer;
    line-height: 1.4;
  }

  .btn-primary {
    background: var(--accent-grad);
    color: #fff;
    padding: 10px 22px;
    box-shadow: var(--shadow-btn);
  }

  .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 14px 32px rgba(245, 158, 11, .45);
  }

  .btn-ghost {
    background: rgba(255, 255, 255, .06);
    color: #fff;
    border-color: rgba(255, 255, 255, .2);
    padding: 10px 22px;
  }

  .btn-ghost:hover {
    background: rgba(255, 255, 255, .14);
  }

  .btn-gold {
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    color: #0f172a;
    font-weight: 700;
  }

  .btn-gold:hover {
    transform: translateY(-2px);
    box-shadow: 0 14px 30px rgba(245, 158, 11, .4);
  }

  .btn-sm {
    padding: 8px 16px;
    font-size: 14px;
    border-radius: 10px;
  }

  .btn-lg {
    padding: 14px 34px;
    font-size: 16px;
    border-radius: 14px;
  }

  /* ===== Hero / Banner ===== */
  .page-hero {
    position: relative;
    background-size: cover;
    background-position: center;
    background-color: var(--bg-dark);
    padding: 110px 0 90px;
    overflow: hidden;
  }

  .page-hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(100deg, rgba(11, 18, 32, .94) 20%, rgba(11, 18, 32, .7) 60%, rgba(11, 18, 32, .35) 100%);
  }

  .hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
  }

  .hero-content .badge {
    margin-bottom: 18px;
  }

  .page-hero h1 {
    font-size: 46px;
    font-weight: 800;
    line-height: 1.25;
    color: #fff;
    margin-bottom: 18px;
    letter-spacing: 1px;
  }

  .page-hero h1 span {
    color: #fbbf24;
  }

  .hero-desc {
    color: rgba(255, 255, 255, .82);
    font-size: 17px;
    line-height: 1.8;
    margin-bottom: 32px;
    max-width: 640px;
  }

  .hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-bottom: 48px;
  }

  .hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
  }

  .hero-stat {
    background: rgba(255, 255, 255, .06);
    border: 1px solid rgba(255, 255, 255, .1);
    border-radius: 16px;
    padding: 18px 14px;
    text-align: center;
    backdrop-filter: blur(6px);
  }

  .hero-stat strong {
    display: block;
    font-size: 28px;
    font-weight: 800;
    color: #fbbf24;
    margin-bottom: 4px;
  }

  .hero-stat span {
    color: rgba(255, 255, 255, .7);
    font-size: 13px;
  }

  /* ===== Badge & Tag ===== */
  .badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    border-radius: 30px;
    font-size: 14px;
    font-weight: 600;
  }

  .badge-gold {
    background: rgba(245, 158, 11, .15);
    color: #fbbf24;
    border: 1px solid rgba(245, 158, 11, .3);
  }

  .tag {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    border-radius: 8px;
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 12px;
    align-self: flex-start;
  }

  .tag-orange {
    background: #fef3c7;
    color: #b45309;
  }

  .tag-blue {
    background: #e0f2fe;
    color: #0369a1;
  }

  .tag-green {
    background: #dcfce7;
    color: #166534;
  }

  .tag-red {
    background: #fee2e2;
    color: #b91c1c;
  }

  /* ===== Section ===== */
  .section {
    padding: 84px 0;
  }

  .section-alt {
    background: #fff;
  }

  .section-dark {
    background: var(--bg-dark);
    color: var(--text-on-dark);
  }

  .section-gray {
    background: #f1f5f9;
  }

  .section-head {
    max-width: 700px;
    margin-bottom: 48px;
  }

  .section-head.center {
    margin-left: auto;
    margin-right: auto;
    text-align: center;
  }

  .section-head .eyebrow {
    display: inline-block;
    font-size: 14px;
    font-weight: 700;
    color: var(--accent-hover);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 10px;
  }

  .section-head h2 {
    font-size: 36px;
    font-weight: 800;
    line-height: 1.3;
    color: var(--text-main);
    margin-bottom: 14px;
  }

  .section-head p {
    color: var(--text-sub);
    font-size: 16px;
    line-height: 1.75;
  }

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

  .section-dark .section-head p {
    color: rgba(255, 255, 255, .65);
  }

  /* ===== Activity Card ===== */
  .activity-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
  }

  .activity-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    border: 1px solid rgba(226, 232, 240, .7);
    transition: transform .3s, box-shadow .3s, border-color .3s;
    display: flex;
    flex-direction: column;
  }

  .activity-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-card-hover);
    border-color: rgba(245, 158, 11, .3);
  }

  .activity-cover {
    position: relative;
    height: 210px;
    overflow: hidden;
  }

  .activity-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .5s;
  }

  .activity-card:hover .activity-cover img {
    transform: scale(1.05);
  }

  .activity-cover .tag {
    position: absolute;
    top: 16px;
    left: 16px;
    margin: 0;
    background: rgba(255, 255, 255, .92);
    backdrop-filter: blur(4px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, .08);
  }

  .activity-body {
    padding: 26px 26px 28px;
    display: flex;
    flex-direction: column;
    flex: 1;
  }

  .activity-body h3 {
    font-size: 21px;
    font-weight: 700;
    margin-bottom: 10px;
  }

  .activity-body p {
    color: var(--text-sub);
    font-size: 14px;
    line-height: 1.75;
    flex: 1;
  }

  .activity-meta {
    display: flex;
    align-items: center;
    gap: 18px;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid #f1f5f9;
    font-size: 13px;
    color: var(--text-sub);
  }

  .activity-meta i {
    color: var(--accent);
    margin-right: 4px;
  }

  .btn-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--accent-hover);
    font-weight: 600;
    font-size: 14px;
    margin-top: 14px;
    transition: gap .25s, color .25s;
  }

  .btn-link:hover {
    gap: 10px;
    color: #92400e;
  }

  /* ===== Benefit Card ===== */
  .benefit-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
  }

  .benefit-card {
    background: rgba(255, 255, 255, .05);
    border: 1px solid rgba(255, 255, 255, .1);
    border-radius: var(--radius-lg);
    padding: 36px 30px;
    text-align: center;
    transition: transform .3s, border-color .3s, background .3s;
  }

  .benefit-card:hover {
    transform: translateY(-6px);
    border-color: rgba(245, 158, 11, .4);
    background: rgba(255, 255, 255, .09);
  }

  .benefit-icon {
    width: 64px;
    height: 64px;
    border-radius: 18px;
    background: var(--accent-grad);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 28px;
    color: #fff;
    box-shadow: 0 10px 24px rgba(245, 158, 11, .3);
  }

  .benefit-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 12px;
  }

  .benefit-card p {
    color: rgba(255, 255, 255, .62);
    font-size: 14px;
    line-height: 1.7;
  }

  .benefit-card .level {
    display: inline-block;
    margin-top: 16px;
    padding: 5px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
    background: rgba(245, 158, 11, .15);
    color: #fbbf24;
  }

  /* ===== Stats ===== */
  .stats-section {
    background: linear-gradient(135deg, #0f172a, #1e293b);
    padding: 70px 0;
  }

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

  .stat-block {
    text-align: center;
    padding: 20px 10px;
  }

  .stat-num {
    display: block;
    font-size: 42px;
    font-weight: 800;
    color: #fbbf24;
    line-height: 1.2;
    margin-bottom: 6px;
  }

  .stat-label {
    color: rgba(255, 255, 255, .65);
    font-size: 14px;
    letter-spacing: 1px;
  }

  /* ===== Steps ===== */
  .steps-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 28px;
    position: relative;
  }

  .steps-grid::before {
    content: "";
    position: absolute;
    top: 40px;
    left: 12%;
    right: 12%;
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(245, 158, 11, .5), transparent);
  }

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

  .step-num {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 2px solid rgba(245, 158, 11, .4);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 800;
    color: var(--accent-hover);
    margin: 0 auto 22px;
    background: #fff;
    box-shadow: 0 8px 24px rgba(245, 158, 11, .15);
    position: relative;
    z-index: 2;
  }

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

  .step-item p {
    color: var(--text-sub);
    font-size: 14px;
    line-height: 1.7;
    padding: 0 8px;
  }

  /* ===== Rules ===== */
  .rules-wrap {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 48px;
    box-shadow: var(--shadow-card);
    border: 1px solid #f1f5f9;
  }

  .rules-wrap h2 {
    font-size: 28px;
    font-weight: 800;
    margin-bottom: 24px;
  }

  .rules-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px 36px;
  }

  .rules-grid li {
    display: flex;
    gap: 14px;
    align-items: flex-start;
    color: var(--text-sub);
    font-size: 15px;
    line-height: 1.7;
  }

  .rules-grid li i {
    color: var(--accent);
    font-size: 16px;
    margin-top: 4px;
    flex-shrink: 0;
  }

  .rules-note {
    margin-top: 28px;
    padding: 18px 22px;
    background: #fffbeb;
    border: 1px solid #fde68a;
    border-radius: 14px;
    color: #92400e;
    font-size: 14px;
    line-height: 1.7;
    display: flex;
    gap: 12px;
  }

  .rules-note i {
    color: #f59e0b;
    margin-top: 3px;
  }

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

  .faq-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
  }

  .faq-item {
    background: #fff;
    border-radius: var(--radius-md);
    padding: 22px 26px;
    box-shadow: var(--shadow-sm);
    border: 1px solid #f1f5f9;
    transition: box-shadow .25s, border-color .25s;
  }

  .faq-item.open {
    border-color: rgba(245, 158, 11, .4);
    box-shadow: 0 8px 24px rgba(245, 158, 11, .1);
  }

  .faq-item h3 {
    font-size: 16px;
    font-weight: 700;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    cursor: pointer;
    margin: 0;
  }

  .faq-item h3 i {
    color: var(--accent);
    font-size: 14px;
    transition: transform .3s;
    flex-shrink: 0;
  }

  .faq-item.open h3 i {
    transform: rotate(45deg);
  }

  .faq-item p {
    color: var(--text-sub);
    font-size: 14px;
    line-height: 1.8;
    margin-top: 14px;
    display: none;
  }

  .faq-item.open p {
    display: block;
  }

  /* ===== CTA ===== */
  .cta-section {
    background: linear-gradient(135deg, #0f172a, #1a2a44);
    padding: 90px 0;
    position: relative;
    overflow: hidden;
  }

  .cta-section::before {
    content: "";
    position: absolute;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(245, 158, 11, .18), transparent 70%);
    top: -120px;
    right: -80px;
  }

  .cta-section::after {
    content: "";
    position: absolute;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(239, 68, 68, .12), transparent 70%);
    bottom: -120px;
    left: -60px;
  }

  .cta-inner {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 720px;
    margin: 0 auto;
  }

  .cta-inner h2 {
    font-size: 38px;
    font-weight: 800;
    color: #fff;
    margin-bottom: 16px;
    line-height: 1.3;
  }

  .cta-inner p {
    color: rgba(255, 255, 255, .75);
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 34px;
  }

  .cta-inner .btn {
    font-size: 17px;
    padding: 16px 44px;
  }

  /* ===== Footer ===== */
  .site-footer {
    background: #0b1220;
    color: rgba(255, 255, 255, .68);
    padding: 60px 0 0;
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 40px;
  }

  .footer-brand p {
    margin-top: 18px;
    font-size: 14px;
    line-height: 1.8;
    max-width: 360px;
    color: rgba(255, 255, 255, .5);
  }

  .footer-grid h4 {
    color: #fff;
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 20px;
  }

  .footer-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
  }

  .footer-links a {
    font-size: 14px;
    color: rgba(255, 255, 255, .55);
    transition: color .2s, padding-left .2s;
  }

  .footer-links a:hover {
    color: #fbbf24;
    padding-left: 4px;
  }

  .footer-contact p {
    font-size: 14px;
    margin-bottom: 12px;
    color: rgba(255, 255, 255, .55);
    display: flex;
    align-items: center;
    gap: 8px;
  }

  .footer-contact i {
    color: #f59e0b;
    width: 16px;
    text-align: center;
  }

  .footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, .08);
    padding: 22px 24px;
    text-align: center;
    font-size: 13px;
    color: rgba(255, 255, 255, .4);
  }

  .footer-bottom p {
    margin-bottom: 4px;
  }

  /* ===== Responsive ===== */
  @media (max-width: 1024px) {
    .main-nav {
      display: none;
      position: absolute;
      top: 74px;
      left: 0;
      right: 0;
      background: rgba(11, 18, 32, .98);
      flex-direction: column;
      align-items: stretch;
      padding: 16px 24px 24px;
      gap: 6px;
      border-bottom: 1px solid rgba(255, 255, 255, .08);
      box-shadow: 0 20px 40px rgba(0, 0, 0, .2);
    }

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

    .nav-link {
      padding: 14px 16px;
      font-size: 16px;
      border-radius: 10px;
    }

    .menu-toggle {
      display: flex;
    }

    .search-box {
      display: none;
    }

    .page-hero {
      padding: 90px 0 70px;
    }

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

  @media (max-width: 768px) {
    .section {
      padding: 64px 0;
    }

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

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

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

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

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

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

    .rules-wrap {
      padding: 30px 24px;
    }

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

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

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

    .cta-inner h2 {
      font-size: 30px;
    }

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

    .hero-actions .btn-lg {
      width: 100%;
      justify-content: center;
    }
  }

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

    .header-inner {
      gap: 12px;
      height: 66px;
    }

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

    .logo-icon {
      width: 36px;
      height: 36px;
      font-size: 18px;
      border-radius: 10px;
    }

    .header-actions {
      gap: 8px;
    }

    .header-actions .btn-sm {
      padding: 7px 12px;
      font-size: 13px;
    }

    .page-hero {
      padding: 64px 0 50px;
    }

    .page-hero h1 {
      font-size: 25px;
    }

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

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

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

    .activity-body h3 {
      font-size: 18px;
    }

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

    .cta-inner .btn {
      width: 100%;
    }

    .rules-wrap h2 {
      font-size: 22px;
    }

    .rules-note {
      flex-direction: column;
    }
  }

  /* ===== Focus visibility ===== */
  a:focus-visible,
  button:focus-visible {
    outline: 2px solid #f59e0b;
    outline-offset: 3px;
  }

  .btn:active {
    transform: translateY(0) scale(.97);
  }