/* roulang page: index */
:root {
      --primary: #F59E0B;
      --primary-hover: #D97706;
      --secondary: #10B981;
      --dark: #0F172A;
      --dark-surface: #1E293B;
      --muted: #475569;
      --bg: #F8FAFC;
      --card-border: #E2E8F0;
    }
    body {
      background-color: var(--bg);
      color: var(--dark);
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.75;
    }
    .hero-bg-pattern {
      background-image: radial-gradient(rgba(245, 158, 11, 0.12) 1px, transparent 1px);
      background-size: 24px 24px;
    }
    .btn-primary {
      background: linear-gradient(135deg, #F59E0B 0%, #D97706 100%);
      color: #FFFFFF;
      transition: all 0.25s ease;
    }
    .btn-primary:hover {
      box-shadow: 0 10px 20px -5px rgba(245, 158, 11, 0.4);
      transform: translateY(-2px);
    }
    .btn-secondary {
      background-color: #FFFFFF;
      color: var(--dark);
      border: 1px solid var(--card-border);
      transition: all 0.2s ease;
    }
    .btn-secondary:hover {
      background-color: #F1F5F9;
      border-color: #CBD5E1;
    }
    .card-modern {
      background: #FFFFFF;
      border: 1px solid var(--card-border);
      border-radius: 1rem;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .card-modern:hover {
      transform: translateY(-4px);
      box-shadow: 0 16px 32px -8px rgba(15, 23, 42, 0.08);
      border-color: #FCD34D;
    }
    @media (min-width: 1024px) {
      .sidebar-nav {
        width: 260px;
        position: fixed;
        top: 0;
        bottom: 0;
        left: 0;
        z-index: 50;
      }
      .main-wrapper {
        margin-left: 260px;
      }
    }

/* roulang page: article */
:root {
      --primary: #F59E0B;
      --primary-hover: #D97706;
      --secondary: #10B981;
      --dark: #0F172A;
      --dark-surface: #1E293B;
      --muted: #475569;
      --bg: #F8FAFC;
      --card-border: #E2E8F0;
    }
    body {
      background-color: var(--bg);
      color: var(--dark);
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.75;
    }
    .hero-bg-pattern {
      background-image: radial-gradient(rgba(245, 158, 11, 0.12) 1px, transparent 1px);
      background-size: 24px 24px;
    }
    .btn-primary {
      background: linear-gradient(135deg, #F59E0B 0%, #D97706 100%);
      color: #FFFFFF;
      transition: all 0.25s ease;
    }
    .btn-primary:hover {
      box-shadow: 0 10px 20px -5px rgba(245, 158, 11, 0.4);
      transform: translateY(-2px);
    }
    .btn-secondary {
      background-color: #FFFFFF;
      color: var(--dark);
      border: 1px solid var(--card-border);
      transition: all 0.2s ease;
    }
    .btn-secondary:hover {
      background-color: #F1F5F9;
      border-color: #CBD5E1;
    }
    .card-modern {
      background: #FFFFFF;
      border: 1px solid var(--card-border);
      border-radius: 1rem;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .card-modern:hover {
      transform: translateY(-4px);
      box-shadow: 0 16px 32px -8px rgba(15, 23, 42, 0.08);
      border-color: #FCD34D;
    }
    .article-body h2 {
      font-size: 1.5rem;
      font-weight: 700;
      color: #0F172A;
      margin-top: 2rem;
      margin-bottom: 1rem;
      padding-bottom: 0.5rem;
      border-bottom: 2px solid #F1F5F9;
    }
    .article-body h3 {
      font-size: 1.25rem;
      font-weight: 600;
      color: #1E293B;
      margin-top: 1.5rem;
      margin-bottom: 0.75rem;
    }
    .article-body p {
      margin-bottom: 1.25rem;
      color: #334155;
      line-height: 1.85;
      font-size: 1.05rem;
    }
    .article-body blockquote {
      border-left: 4px solid var(--primary);
      padding: 0.75rem 1.25rem;
      background-color: #FFFBEB;
      border-radius: 0 0.5rem 0.5rem 0;
      margin: 1.5rem 0;
      color: #92400E;
    }
    .article-body ul, .article-body ol {
      margin-bottom: 1.25rem;
      padding-left: 1.5rem;
      color: #334155;
    }
    .article-body ul {
      list-style-type: disc;
    }
    .article-body ol {
      list-style-type: decimal;
    }
    .article-body img {
      max-width: 100%;
      height: auto;
      border-radius: 0.75rem;
      margin: 1.5rem 0;
    }
    .sidebar-nav {
      width: 260px;
      position: fixed;
      top: 0;
      bottom: 0;
      left: 0;
      z-index: 50;
    }
    .main-wrapper {
      margin-left: 0;
    }
    @media (min-width: 1024px) {
      .main-wrapper {
        margin-left: 260px;
      }
    }

/* roulang page: category1 */
:root {
      --primary: #F59E0B;
      --primary-hover: #D97706;
      --secondary: #10B981;
      --dark: #0F172A;
      --dark-surface: #1E293B;
      --muted: #475569;
      --bg: #F8FAFC;
      --card-border: #E2E8F0;
    }
    body {
      background-color: var(--bg);
      color: var(--dark);
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.75;
    }
    .hero-bg-pattern {
      background-image: radial-gradient(rgba(245, 158, 11, 0.12) 1px, transparent 1px);
      background-size: 24px 24px;
    }
    .btn-primary {
      background: linear-gradient(135deg, #F59E0B 0%, #D97706 100%);
      color: #FFFFFF;
      transition: all 0.25s ease;
    }
    .btn-primary:hover {
      box-shadow: 0 10px 20px -5px rgba(245, 158, 11, 0.4);
      transform: translateY(-2px);
    }
    .btn-secondary {
      background-color: #FFFFFF;
      color: var(--dark);
      border: 1px solid var(--card-border);
      transition: all 0.2s ease;
    }
    .btn-secondary:hover {
      background-color: #F1F5F9;
      border-color: #CBD5E1;
    }
    .card-modern {
      background: #FFFFFF;
      border: 1px solid var(--card-border);
      border-radius: 1rem;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .card-modern:hover {
      transform: translateY(-4px);
      box-shadow: 0 16px 32px -8px rgba(15, 23, 42, 0.08);
      border-color: #FCD34D;
    }
    .sidebar-nav {
      width: 260px;
      position: fixed;
      top: 0;
      bottom: 0;
      left: 0;
      z-index: 50;
    }
    .main-wrapper {
      margin-left: 260px;
    }
    @media (max-width: 1023px) {
      .sidebar-nav {
        display: none;
      }
      .main-wrapper {
        margin-left: 0;
      }
    }
    .faq-collapse details[open] summary ~ * {
      animation: sweep .3s ease-in-out;
    }
    @keyframes sweep {
      0%    {opacity: 0; transform: translateY(-8px)}
      100%  {opacity: 1; transform: translateY(0)}
    }