/* roulang page: index */
:root {
      --brand-primary: #2563eb;
      --brand-primary-hover: #1d4ed8;
      --brand-secondary: #0284c7;
      --brand-accent: #38bdf8;
      --brand-bg: #f8fafc;
      --brand-text: #0f172a;
      --brand-muted: #64748b;
      --brand-border: #e2e8f0;
      --brand-card-bg: #ffffff;
      --card-shadow: 0 10px 25px -5px rgba(37, 99, 235, 0.06), 0 8px 10px -6px rgba(37, 99, 235, 0.04);
      --card-hover-shadow: 0 20px 35px -8px rgba(37, 99, 235, 0.12), 0 12px 16px -8px rgba(37, 99, 235, 0.08);
    }
    
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
      background-color: var(--brand-bg);
      color: var(--brand-text);
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    
    .nav-panel {
      backdrop-filter: blur(12px);
      background: rgba(255, 255, 255, 0.88);
      border: 1px solid rgba(226, 232, 240, 0.8);
      box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
    }
    
    .hero-video-stage {
      background: radial-gradient(circle at 50% 30%, #1e3a8a 0%, #0f172a 75%, #020617 100%);
      position: relative;
    }
    
    .hero-video-stage::before {
      content: "";
      position: absolute;
      inset: 0;
      background: repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.03) 0px, rgba(255, 255, 255, 0.03) 1px, transparent 1px, transparent 2px);
      pointer-events: none;
    }

    .pulse-ring {
      animation: pulseGlow 3s infinite;
    }
    
    @keyframes pulseGlow {
      0% { transform: scale(0.96); box-shadow: 0 0 0 0 rgba(56, 189, 248, 0.6); }
      70% { transform: scale(1.04); box-shadow: 0 0 0 22px rgba(56, 189, 248, 0); }
      100% { transform: scale(0.96); box-shadow: 0 0 0 0 rgba(56, 189, 248, 0); }
    }

    .content-card {
      background: var(--brand-card-bg);
      border: 1px solid var(--brand-border);
      border-radius: 1rem;
      transition: all 0.28s ease;
      box-shadow: var(--card-shadow);
    }
    
    .content-card:hover {
      transform: translateY(-4px);
      border-color: #cbd5e1;
      box-shadow: var(--card-hover-shadow);
    }

    .danmaku-item {
      animation: floatDanmaku 14s linear infinite;
      white-space: nowrap;
    }

    @keyframes floatDanmaku {
      0% { transform: translateX(100%); }
      100% { transform: translateX(-120%); }
    }

    details summary::-webkit-details-marker {
      display: none;
    }