/* roulang page: index */
:root {
      --color-primary: #0D9488;
      --color-primary-hover: #0F766E;
      --color-navy: #0F172A;
      --color-slate: #1E293B;
      --color-text-main: #334155;
      --color-text-muted: #64748B;
      --bg-light: #F8FAFC;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      color: var(--color-text-main);
      background-color: #FFFFFF;
      font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }
    .custom-container {
      width: 100%;
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.25rem;
      padding-right: 1.25rem;
    }
    .hero-bg {
      background: linear-gradient(135deg, rgba(15, 23, 42, 0.94) 0%, rgba(30, 41, 59, 0.88) 100%), url('/assets/images/347edbc98cefdfde.jpg') center/cover no-repeat;
    }
    .section-card {
      background: #FFFFFF;
      border: 1px solid rgba(226, 232, 240, 0.9);
      box-shadow: 0 4px 20px -4px rgba(15, 23, 42, 0.05);
      transition: all 0.25s ease-in-out;
    }
    .section-card:hover {
      transform: translateY(-3px);
      box-shadow: 0 12px 28px -6px rgba(13, 148, 136, 0.12);
      border-color: rgba(13, 148, 136, 0.3);
    }
    .tab-btn.active {
      background-color: #0D9488;
      color: #FFFFFF;
      border-color: #0D9488;
    }