/* roulang page: index */
:root {
      --color-primary: #00F2FE;
      --color-primary-dark: #059669;
      --color-accent: #FF5722;
      --color-purple: #6366F1;
      --bg-dark: #0B0F19;
      --bg-card: #151C2C;
      --bg-card-hover: #1E273E;
      --border-subtle: rgba(255, 255, 255, 0.08);
      --border-glow: rgba(0, 242, 254, 0.3);
      --text-main: #F3F4F6;
      --text-muted: #9CA3AF;
    }
    
    html {
      scroll-behavior: smooth;
    }
    
    body {
      background-color: var(--bg-dark);
      color: var(--text-main);
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
      overflow-x: hidden;
    }

    .border-glow-hover {
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      border: 1px solid var(--border-subtle);
    }
    .border-glow-hover:hover {
      border-color: var(--color-primary);
      box-shadow: 0 0 25px rgba(0, 242, 254, 0.15);
      transform: translateY(-4px);
    }

    .badge-accent {
      background: linear-gradient(135deg, rgba(255, 87, 34, 0.2), rgba(99, 102, 241, 0.2));
      border: 1px solid rgba(255, 87, 34, 0.4);
    }

    .hero-bg-overlay {
      background: linear-gradient(180deg, rgba(11, 15, 25, 0.78) 0%, rgba(11, 15, 25, 0.95) 100%);
    }

    /* 竖屏视频卡片交互质感 */
    .vertical-screen-card {
      position: relative;
      border-radius: 20px;
      overflow: hidden;
      aspect-ratio: 9 / 16;
      max-width: 320px;
      margin: 0 auto;
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6), 0 0 20px rgba(99, 102, 241, 0.3);
      border: 2px solid rgba(255, 255, 255, 0.12);
    }