/* roulang page: index */
:root {
      --primary: #0B2545;
      --accent: #00C49F;
      --accent-coral: #FF5A36;
      --bg-light: #F8FAFC;
      --text-main: #0F172A;
      --text-muted: #64748B;
      --border-color: rgba(226, 232, 240, 0.8);
      --radius-sm: 8px;
      --radius-md: 12px;
      --shadow-sm: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
      --shadow-lg: 0 10px 30px -4px rgba(11, 37, 69, 0.12);
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
      color: var(--text-main);
      background-color: #ffffff;
      line-height: 1.65;
    }
    .custom-shadow {
      box-shadow: var(--shadow-sm);
    }
    .custom-shadow-lg {
      box-shadow: var(--shadow-lg);
    }
    .hover-lift {
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .hover-lift:hover {
      transform: translateY(-4px);
    }
    .glass-nav {
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
    }
    .dark-pattern {
      background-color: #0F172A;
      background-image: radial-gradient(rgba(0, 196, 159, 0.1) 1px, transparent 0);
      background-size: 24px 24px;
    }