/* roulang page: index */
:root {
      --primary: #0E7490;
      --primary-alt: #059669;
      --accent: #F97316;
      --bg-slate: #F8FAFC;
      --bg-mint: #F0FDF4;
      --midnight: #0F172A;
      --text-main: #0F172A;
      --text-muted: #475569;
      --border-soft: #E2E8F0;
    }
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
    }
    body {
      background-color: var(--bg-slate);
      color: var(--text-main);
      overflow-x: hidden;
    }
    .custom-container {
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.25rem;
      padding-right: 1.25rem;
    }
    .hero-bg-overlay {
      background: linear-gradient(135deg, rgba(15, 23, 42, 0.88) 0%, rgba(14, 116, 144, 0.82) 100%);
    }
    .badge-soft {
      display: inline-flex;
      align-items: center;
      padding: 0.25rem 0.75rem;
      border-radius: 9999px;
      font-size: 0.75rem;
      font-weight: 600;
    }
    .accordion-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
    }
    .accordion-content.active {
      max-height: 1000px;
      transition: max-height 0.35s ease-in-out;
    }
    .nav-link {
      position: relative;
      transition: color 0.2s ease;
    }
    .nav-link::after {
      content: '';
      position: absolute;
      width: 0;
      height: 2px;
      bottom: -4px;
      left: 0;
      background-color: var(--primary);
      transition: width 0.25s ease;
    }
    .nav-link:hover::after {
      width: 100%;
    }