/* roulang page: index */
:root {
      --primary: #0E7490;
      --primary-dark: #155E75;
      --primary-light: #E0F2FE;
      --secondary: #F59E0B;
      --accent: #10B981;
      --dark-surface: #0F172A;
      --dark-card: #1E293B;
      --text-main: #0F172A;
      --text-muted: #334155;
      --text-soft: #64748B;
      --bg-page: #F8FAFC;
      --border-color: #E2E8F0;
    }

    html {
      scroll-behavior: smooth;
      font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

    body {
      background-color: var(--bg-page);
      color: var(--text-main);
      overflow-x: hidden;
      line-height: 1.75;
    }

    /* Custom Design Elements */
    .hero-mask {
      background: linear-gradient(135deg, rgba(15, 23, 42, 0.92) 0%, rgba(14, 116, 144, 0.88) 100%);
    }

    .card-hover-effect {
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .card-hover-effect:hover {
      transform: translateY(-5px);
      box-shadow: 0 16px 32px -8px rgba(15, 23, 42, 0.12);
    }

    .section-title-tag {
      display: inline-flex;
      align-items: center;
      padding: 0.25rem 0.875rem;
      border-radius: 9999px;
      font-size: 0.875rem;
      font-weight: 600;
      background-color: #E0F2FE;
      color: #0369A1;
      margin-bottom: 0.75rem;
    }

    .badge-tag {
      background-color: #FEF3C7;
      color: #B45309;
      font-size: 0.75rem;
      padding: 0.2rem 0.6rem;
      border-radius: 0.375rem;
      font-weight: 600;
    }

    /* Accordion styles */
    details > summary {
      list-style: none;
    }
    details > summary::-webkit-details-marker {
      display: none;
    }
    details[open] summary .faq-icon {
      transform: rotate(180deg);
    }