/* roulang page: index */
:root {
            --bg-base: #0F1115;
            --accent: #00E599;
            --accent-rgb: 0, 229, 153;
            --card-border: #262A34;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: #0F1115;
            color: #E6EDF3;
            overflow-x: hidden;
        }
        .mono-num {
            font-family: 'DIN Alternate', -apple-system, monospace;
        }
        .hero-bg {
            background-image: linear-gradient(180deg, rgba(15, 17, 21, 0.72) 0%, rgba(15, 17, 21, 0.96) 100%), url('/assets/images/e941dc1091e70e47.jpg');
            background-size: cover;
            background-position: center;
        }
        .industrial-grid {
            background-size: 32px 32px;
            background-image: linear-gradient(to right, rgba(255, 255, 255, 0.03) 1px, transparent 1px),
                              linear-gradient(to bottom, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
        }
        .card-glow:hover {
            border-color: rgba(0, 229, 153, 0.5);
            box-shadow: 0 4px 20px rgba(0, 229, 153, 0.12);
            transform: translateY(-2px);
        }
        details > summary {
            list-style: none;
        }
        details > summary::-webkit-details-marker {
            display: none;
        }
        details[open] summary .faq-icon {
            transform: rotate(180deg);
        }