/* roulang page: index */
:root {
            --primary: #0F172A;
            --accent: #0EA5E9;
            --accent-cyan: #06B6D4;
            --safety-green: #10B981;
            --bg-light: #F8FAFC;
            --text-main: #1E293B;
            --text-muted: #64748B;
            --border-color: #E2E8F0;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--text-main);
            background-color: #FFFFFF;
            overflow-x: hidden;
        }

        .hero-diagonal-bg {
            background-image: linear-gradient(135deg, rgba(15, 23, 42, 0.95) 0%, rgba(2, 6, 23, 0.92) 100%), url('/assets/images/645b09ca1e1cba01.webp');
            background-size: cover;
            background-position: center;
        }

        .glass-panel {
            background: rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 255, 255, 0.15);
        }

        .card-custom-hover {
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-custom-hover:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 28px -6px rgba(14, 165, 233, 0.12), 0 8px 10px -6px rgba(15, 23, 42, 0.06);
        }

        details summary::-webkit-details-marker {
            display: none;
        }
        details[open] summary .faq-icon {
            transform: rotate(180deg);
            color: #0284c7;
        }
        details[open] {
            border-color: #0ea5e9;
            background-color: #f0f9ff;
        }