/* roulang page: index */
:root {
      --primary: #0F172A;
      --accent: #2563EB;
      --accent-cyan: #06B6D4;
      --accent-purple: #4338CA;
      --bg-light: #F8FAFC;
      --text-main: #334155;
      --text-muted: #64748B;
      --card-radius: 20px;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background-color: #FFFFFF;
      overflow-x: hidden;
    }
    .custom-container {
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.25rem;
      padding-right: 1.25rem;
    }
    .brand-gradient-text {
      background: linear-gradient(135deg, #4338CA 0%, #2563EB 50%, #06B6D4 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .brand-gradient-bg {
      background: linear-gradient(135deg, #4338CA 0%, #2563EB 50%, #06B6D4 100%);
    }
    .card-shadow {
      box-shadow: 0 10px 30px -5px rgba(15, 23, 42, 0.05);
      border: 1px solid rgba(226, 232, 240, 0.8);
      border-radius: var(--card-radius);
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .card-shadow:hover {
      transform: translateY(-4px);
      box-shadow: 0 20px 35px -5px rgba(37, 99, 235, 0.12);
      border-color: rgba(6, 182, 212, 0.4);
    }
    .dark-card-glass {
      background: rgba(15, 23, 42, 0.7);
      backdrop-filter: blur(12px);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--card-radius);
    }
    .scroll-anchor {
      scroll-margin-top: 88px;
    }