/* roulang page: index */
:root {
            --bg-deep: #06090C;
            --bg-surface: #0B1217;
            --card-surface: #121A22;
            --border-glow: #1F2E3B;
            --accent-green: #00E599;
            --accent-cyan: #06B6D4;
            --text-main: #F8FAFC;
            --text-muted: #94A3B8;
        }

        body {
            background-color: var(--bg-deep);
            color: var(--text-main);
            overflow-x: hidden;
            font-feature-settings: "cv02", "cv03", "cv04", "cv11";
        }

        /* 工业级毛玻璃质感与电光微光边框 */
        .glass-header {
            background: rgba(11, 18, 23, 0.88);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .car-card {
            background: linear-gradient(180deg, rgba(18, 26, 34, 0.9) 0%, rgba(11, 18, 23, 0.95) 100%);
            border: 1px solid var(--border-glow);
            transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
        }

        .car-card:hover {
            border-color: rgba(0, 229, 153, 0.45);
            transform: translateY(-4px);
            box-shadow: 0 16px 36px -10px rgba(0, 229, 153, 0.12);
        }

        .tech-badge {
            background: rgba(0, 229, 153, 0.1);
            border: 1px solid rgba(0, 229, 153, 0.3);
            color: #00E599;
        }

        .glow-btn {
            background: #00E599;
            color: #06090C;
            transition: all 0.3s ease;
            box-shadow: 0 0 20px rgba(0, 229, 153, 0.35);
        }

        .glow-btn:hover {
            background: #05fbb0;
            box-shadow: 0 0 30px rgba(0, 229, 153, 0.55);
            transform: translateY(-1px);
        }

        .border-glow-cyan {
            border-color: rgba(6, 182, 212, 0.3);
        }

        .border-glow-cyan:hover {
            border-color: rgba(6, 182, 212, 0.6);
            box-shadow: 0 10px 30px -10px rgba(6, 182, 212, 0.2);
        }

        /* 原生折叠手风琴动效 */
        details summary::-webkit-details-marker {
            display: none;
        }

        details[open] summary .faq-icon {
            transform: rotate(180deg);
            color: #00E599;
        }

        details[open] {
            border-color: rgba(0, 229, 153, 0.4);
            background-color: rgba(18, 26, 34, 0.95);
        }