/* roulang page: index */
:root {
            --primary-lava: #e64a19;
            --primary-lava-hover: #ff5722;
            --bg-dark: #111317;
            --bg-panel: #1a1d24;
            --border-dark: #2c323f;
            --text-lead: #0f172a;
            --text-body: #475569;
        }
        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Segoe UI", Roboto, sans-serif;
            background-color: #f7f8fa;
            color: #334155;
            overflow-x: hidden;
        }
        .circuit-pattern {
            background-color: #111317;
            background-image: radial-gradient(rgba(230, 74, 25, 0.15) 1px, transparent 0);
            background-size: 28px 28px;
        }
        .hero-progress-ring {
            transform: rotate(-90deg);
            transform-origin: 50% 50%;
        }
        .tech-border {
            border: 1px solid rgba(226, 232, 240, 0.8);
            transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        }
        .tech-border:hover {
            border-color: #e64a19;
            transform: translateY(-2px);
            box-shadow: 0 12px 24px -10px rgba(230, 74, 25, 0.15);
        }
        .dark-tech-card {
            border: 1px solid #242933;
            background: #1a1d24;
            transition: all 0.3s ease;
        }
        .dark-tech-card:hover {
            border-color: #e64a19;
            transform: translateY(-3px);
        }
        .badge-pulse {
            position: relative;
        }
        .badge-pulse::after {
            content: '';
            position: absolute;
            width: 100%;
            height: 100%;
            top: 0;
            left: 0;
            border-radius: 9999px;
            background-color: inherit;
            animation: pulse-ring 2s cubic-bezier(0.215, 0.61, 0.355, 1) infinite;
            z-index: -1;
        }
        @keyframes pulse-ring {
            0% { transform: scale(0.95); opacity: 0.8; }
            100% { transform: scale(1.4); opacity: 0; }
        }
        /* FAQ手风琴样式 */
        details > summary {
            list-style: none;
        }
        details > summary::-webkit-details-marker {
            display: none;
        }
        details[open] summary .faq-icon {
            transform: rotate(45deg);
            color: #e64a19;
        }