/* roulang page: index */
:root {
      --primary: #2563EB;
      --accent: #06B6D4;
      --dark: #0B0F19;
      --card-bg: #FFFFFF;
      --text-main: #0F172A;
      --text-muted: #64748B;
      --radius-card: 1.25rem;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Segoe UI", "Microsoft YaHei", sans-serif;
      background-color: #F8FAFC;
      color: var(--text-main);
      overflow-x: hidden;
      line-height: 1.6;
    }
    html {
      scroll-behavior: smooth;
    }
    .badge-blur {
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border: 1px solid rgba(6, 182, 212, 0.3);
    }
    .hero-glow-overlay {
      background: radial-gradient(circle at 70% 30%, rgba(37, 99, 235, 0.35) 0%, rgba(11, 15, 25, 0.95) 75%);
    }
    .text-gradient {
      background: linear-gradient(135deg, #06B6D4 0%, #3B82F6 50%, #6366F1 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .bg-gradient-brand {
      background: linear-gradient(135deg, #06B6D4 0%, #3B82F6 50%, #2563EB 100%);
    }
    .interactive-card {
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .interactive-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 20px 35px -10px rgba(37, 99, 235, 0.16);
    }
    details summary::-webkit-details-marker {
      display: none;
    }