/* roulang page: index */
:root {
            --primary: #00C076;
            --primary-dark: #0F9F5C;
            --accent: #FF6B00;
            --dark: #111827;
            --cloud: #F8FAFC;
            --border-color: #E2E8F0;
        }
        * {
            box-sizing: border-box;
            -webkit-tap-highlight-color: transparent;
        }
        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', system-ui, sans-serif;
            color: #374151;
            background-color: #FFFFFF;
            line-height: 1.75;
        }
        .cta-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.75rem 1.75rem;
            font-weight: 600;
            border-radius: 0.5rem;
            transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            min-height: 44px;
            min-width: 44px;
        }
        .cta-btn-primary {
            background-color: var(--accent);
            color: #FFFFFF;
            box-shadow: 0 4px 12px rgba(255, 107, 0, 0.25);
        }
        .cta-btn-primary:hover {
            background-color: #E05E00;
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(255, 107, 0, 0.35);
        }
        .cta-btn-primary:focus {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        .cta-btn-sub {
            background-color: rgba(255, 255, 255, 0.95);
            color: var(--dark);
            border: 1px solid #D1D5DB;
        }
        .cta-btn-sub:hover {
            background-color: #F3F4F6;
            transform: translateY(-2px);
        }
        .section-tag {
            display: inline-flex;
            align-items: center;
            padding: 0.25rem 0.85rem;
            border-radius: 9999px;
            font-size: 0.875rem;
            font-weight: 600;
            letter-spacing: 0.025em;
            background-color: rgba(0, 192, 118, 0.12);
            color: #0F9F5C;
            margin-bottom: 0.75rem;
        }
        .feature-card {
            border: 1px solid var(--border-color);
            border-radius: 0.75rem;
            background-color: #FFFFFF;
            transition: all 0.25s ease;
        }
        .feature-card:hover {
            transform: translateY(-4px);
            border-color: #CBD5E1;
            box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.06), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
        }
        details summary::-webkit-details-marker {
            display: none;
        }
        details[open] summary svg {
            transform: rotate(180deg);
        }

/* roulang page: category1 */
:root {
      --primary: #00C076;
      --primary-dark: #0F9F5C;
      --accent: #FF6B00;
      --dark: #111827;
      --cloud: #F8FAFC;
      --border-color: #E2E8F0;
    }
    body {
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', system-ui, sans-serif;
      color: #374151;
      background-color: #FFFFFF;
      line-height: 1.75;
    }
    .cta-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 0.75rem 1.75rem;
      font-weight: 600;
      border-radius: 0.5rem;
      transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
      min-height: 44px;
      min-width: 44px;
    }
    .cta-btn-primary {
      background-color: var(--accent);
      color: #FFFFFF;
      box-shadow: 0 4px 12px rgba(255, 107, 0, 0.25);
    }
    .cta-btn-primary:hover {
      background-color: #E05E00;
      transform: translateY(-2px);
      box-shadow: 0 6px 16px rgba(255, 107, 0, 0.35);
    }
    .cta-btn-primary:focus {
      outline: 2px solid var(--primary);
      outline-offset: 2px;
    }
    .cta-btn-sub {
      background-color: rgba(255, 255, 255, 0.95);
      color: var(--dark);
      border: 1px solid #D1D5DB;
    }
    .cta-btn-sub:hover {
      background-color: #F3F4F6;
      transform: translateY(-2px);
    }
    .section-tag {
      display: inline-flex;
      align-items: center;
      padding: 0.25rem 0.85rem;
      border-radius: 9999px;
      font-size: 0.875rem;
      font-weight: 600;
      letter-spacing: 0.025em;
      background-color: rgba(0, 192, 118, 0.12);
      color: #0F9F5C;
      margin-bottom: 0.75rem;
    }
    .feature-card {
      border: 1px solid var(--border-color);
      border-radius: 0.75rem;
      background-color: #FFFFFF;
      transition: all 0.25s ease;
    }
    .feature-card:hover {
      transform: translateY(-4px);
      border-color: #CBD5E1;
      box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.06), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
    }
    .category-chip {
      display: inline-flex;
      align-items: center;
      padding: 0.5rem 1.25rem;
      border-radius: 9999px;
      font-size: 0.875rem;
      font-weight: 500;
      transition: all 0.2s ease;
      cursor: pointer;
      text-decoration: none;
    }
    .category-chip.active {
      background-color: #0F9F5C;
      color: #FFFFFF;
    }
    .category-chip:not(.active) {
      background-color: #FFFFFF;
      color: #475569;
      border: 1px solid #E2E8F0;
    }
    .category-chip:not(.active):hover {
      background-color: #F1F5F9;
      color: #0F9F5C;
    }
    .step-badge {
      width: 2rem;
      height: 2rem;
      border-radius: 9999px;
      background-color: #00C076;
      color: #FFFFFF;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.875rem;
    }