/* roulang page: index */
:root {
      --primary: #4F46E5;
      --primary-light: #6366F1;
      --accent: #06B6D4;
      --accent-alt: #10B981;
      --bg-base: #F8FAFC;
      --text-main: #0F172A;
      --text-muted: #64748B;
      --border-light: #E2E8F0;
      --radius-card: 24px;
      --shadow-soft: 0 10px 30px -10px rgba(0, 0, 0, 0.06);
    }
    
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

    body {
      background-color: var(--bg-base);
      color: var(--text-main);
      overflow-x: hidden;
    }

    .gradient-title {
      background: linear-gradient(135deg, #4F46E5 0%, #06B6D4 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .badge-pill {
      display: inline-flex;
      align-items: center;
      padding: 0.35rem 0.85rem;
      border-radius: 9999px;
      font-size: 0.8125rem;
      font-weight: 600;
      line-height: 1;
    }

    .badge-purple {
      background: rgba(99, 102, 241, 0.1);
      color: #4F46E5;
      border: 1px solid rgba(99, 102, 241, 0.25);
    }

    .badge-cyan {
      background: rgba(6, 182, 212, 0.1);
      color: #0891B2;
      border: 1px solid rgba(6, 182, 212, 0.25);
    }

    .badge-amber {
      background: rgba(245, 158, 11, 0.1);
      color: #D97706;
      border: 1px solid rgba(245, 158, 11, 0.25);
    }

    .badge-emerald {
      background: rgba(16, 185, 129, 0.1);
      color: #059669;
      border: 1px solid rgba(16, 185, 129, 0.25);
    }

    .card-rounded {
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-soft);
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }

    .card-rounded:hover {
      transform: translateY(-4px);
      box-shadow: 0 20px 40px -15px rgba(79, 70, 229, 0.12);
    }

    .nav-link {
      display: flex;
      align-items: center;
      padding: 0.75rem 1rem;
      font-size: 0.9375rem;
      font-weight: 500;
      color: #475569;
      border-radius: 12px;
      transition: all 0.2s ease;
    }

    .nav-link:hover, .nav-link.active {
      color: #4F46E5;
      background: #EEF2FF;
    }

    .glow-border {
      border: 1px solid rgba(255, 255, 255, 0.1);
      backdrop-filter: blur(12px);
    }

    /* Accordion Custom Styling */
    details > summary {
      list-style: none;
    }
    details > summary::-webkit-details-marker {
      display: none;
    }
    details[open] summary svg {
      transform: rotate(180deg);
    }