/* roulang page: index */
:root {
      --primary: #0F172A;
      --accent: #10B981;
      --accent-dark: #059669;
      --bg-light: #FAFAFA;
      --bg-dark: #0B0F19;
      --text-main: #0F172A;
      --text-muted: #334155;
      --border-color: #E2E8F0;
    }
    body {
      font-family: system-ui, -apple-system, 'SF Pro Display', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      background-color: var(--bg-light);
      color: var(--text-main);
      overflow-x: hidden;
    }
    .hero-bg {
      background: linear-gradient(135deg, rgba(11, 15, 25, 0.92) 0%, rgba(15, 23, 42, 0.88) 100%),
                  url('/assets/images/77518999280d949a.jpg') center/cover no-repeat;
    }
    .dark-section-bg {
      background: linear-gradient(180deg, #0B0F19 0%, #080C14 100%),
                  url('/assets/images/88374000e62bf143.png') center/cover no-repeat;
    }
    .cta-glow-bg {
      background: radial-gradient(circle at 50% 0%, rgba(16, 185, 129, 0.15) 0%, rgba(15, 23, 42, 0.98) 75%),
                  url('/assets/images/14577c8341adff7b.jpg') center/cover no-repeat;
    }
    details summary::-webkit-details-marker {
      display: none;
    }
    details[open] summary .faq-icon {
      transform: rotate(180deg);
    }
    .nav-drawer {
      transition: transform 0.3s ease-in-out;
    }