/* roulang page: index */
:root {
      --primary: #00D084;
      --primary-dark: #05C46B;
      --secondary: #0F172A;
      --accent: #FF5E3A;
      --bg-light: #F8FAFC;
      --text-main: #0F172A;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
      --radius-lg: 16px;
      --shadow-subtle: 0 10px 25px -5px rgba(15, 23, 42, 0.04), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background-color: var(--bg-light);
      line-height: 1.7;
    }
    .hero-bg {
      background-image: linear-gradient(to right, rgba(11, 15, 25, 0.95), rgba(15, 23, 42, 0.85)), url('/assets/images/763c8ee2f43253e7.jpg');
      background-size: cover;
      background-position: center;
    }
    .dark-showcase-bg {
      background-image: linear-gradient(to bottom, rgba(11, 15, 25, 0.96), rgba(15, 23, 42, 0.98)), url('/assets/images/ae537a6f1341ed3f.jpg');
      background-size: cover;
      background-position: center;
    }
    .card-hover-effect {
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .card-hover-effect:hover {
      transform: translateY(-4px);
      box-shadow: 0 20px 25px -5px rgba(0, 208, 132, 0.12), 0 10px 10px -5px rgba(0, 208, 132, 0.04);
      border-color: rgba(0, 208, 132, 0.4);
    }
    .accordion-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out;
    }
    .accordion-item.active .accordion-content {
      max-height: 400px;
    }
    .accordion-item.active .accordion-icon {
      transform: rotate(180deg);
    }