/* roulang page: index */
:root {
      --primary: #F97316;
      --secondary: #10B981;
      --accent: #0F172A;
      --bg-cream: #FDFBF7;
      --text-main: #1E293B;
      --text-muted: #64748B;
      --card-radius: 1.25rem;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      background-color: var(--bg-cream);
      color: var(--text-main);
      font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', system-ui, sans-serif;
      overflow-x: hidden;
    }
    .custom-scroll::-webkit-scrollbar {
      height: 6px;
      width: 6px;
    }
    .custom-scroll::-webkit-scrollbar-thumb {
      background: #CBD5E1;
      border-radius: 9999px;
    }
    .glass-nav {
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
    }
    .hero-glow {
      background: radial-gradient(circle at 50% 50%, rgba(249, 115, 22, 0.25) 0%, rgba(15, 23, 42, 0) 70%);
    }
    .soft-shadow {
      box-shadow: 0 12px 36px -12px rgba(15, 23, 42, 0.08);
    }
    .soft-shadow-hover {
      transition: all 0.3s ease;
    }
    .soft-shadow-hover:hover {
      box-shadow: 0 20px 40px -15px rgba(249, 115, 22, 0.16);
      transform: translateY(-4px);
    }
    .accordion-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out;
    }
    .accordion-open .accordion-content {
      max-height: 300px;
    }
    .accordion-open .accordion-arrow {
      transform: rotate(180deg);
    }