/* roulang page: index */
:root {
      --bg-main: #0A0D14;
      --bg-surface: #121722;
      --bg-elevated: #1A2232;
      --primary-color: #00E599;
      --secondary-color: #00C4DF;
      --text-main: #FFFFFF;
      --text-sub: #CBD5E1;
      --text-mute: #64748B;
      --border-line: rgba(255, 255, 255, 0.08);
      --border-highlight: rgba(0, 229, 153, 0.35);
    }
    body {
      background-color: var(--bg-main);
      color: var(--text-sub);
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      overflow-x: hidden;
    }
    .tech-glow-aurora {
      box-shadow: 0 0 35px -5px rgba(0, 229, 153, 0.28);
    }
    .tech-glow-cyan {
      box-shadow: 0 0 35px -5px rgba(0, 196, 223, 0.25);
    }
    .subtle-border {
      border: 1px solid var(--border-line);
    }
    .subtle-border-glow:hover {
      border-color: var(--border-highlight);
      box-shadow: 0 10px 30px -10px rgba(0, 229, 153, 0.2);
    }
    .gradient-hero-mask {
      background: linear-gradient(180deg, rgba(10, 13, 20, 0.75) 0%, rgba(10, 13, 20, 0.92) 70%, #0A0D14 100%);
    }
    .gradient-card-dark {
      background: linear-gradient(145deg, #161D2B 0%, #0F141E 100%);
    }
    .grid-pattern {
      background-size: 40px 40px;
      background-image: 
        linear-gradient(to right, rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    }
    input::placeholder, select::placeholder {
      color: #64748B;
    }