/* roulang page: index */
:root {
      --primary: #10B981;
      --primary-hover: #059669;
      --bg-dark: #0B1120;
      --bg-surface: #0F172A;
      --bg-light: #F8FAFC;
      --text-main: #1E293B;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
    }
    * {
      box-sizing: border-box;
      scroll-behavior: smooth;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
      color: var(--text-main);
      background-color: #FFFFFF;
      overflow-x: hidden;
      line-height: 1.65;
    }
    .hero-bg {
      background: linear-gradient(135deg, rgba(11, 17, 32, 0.94) 0%, rgba(15, 23, 42, 0.88) 100%), url('/assets/images/57391da5665e37cb.jpg') center/cover no-repeat;
    }
    .tech-bg {
      background: linear-gradient(180deg, rgba(11, 17, 32, 0.98) 0%, rgba(15, 23, 42, 0.95) 100%), url('/assets/images/212f69c6cced1fb0.jpg') center/cover no-repeat;
    }
    .section-band {
      padding: 5.5rem 1.25rem;
    }
    @media (max-width: 768px) {
      .section-band {
        padding: 3.5rem 1rem;
      }
    }
    .custom-shadow {
      box-shadow: 0 10px 30px -5px rgba(15, 23, 42, 0.06), 0 4px 12px -2px rgba(15, 23, 42, 0.04);
    }
    .active-tab {
      background-color: #10B981 !important;
      color: #FFFFFF !important;
      border-color: #10B981 !important;
    }