/* roulang page: index */
:root {
            --primary: #1e40af;
            --primary-hover: #1d4ed8;
            --accent: #06b6d4;
            --live: #10b981;
            --bg-light: #f8fafc;
            --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
            --card-hover-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
            color: #334155;
            background-color: #f8fafc;
            overflow-x: hidden;
        }

        .hero-bg-poster {
            background: linear-gradient(180deg, rgba(15, 23, 42, 0.85) 0%, rgba(15, 23, 42, 0.95) 100%), url('/assets/images/ebed10c87eddd434.jpg') center/cover no-repeat;
        }

        .dark-tech-pattern {
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
        }

        .card-elevated {
            box-shadow: var(--card-shadow);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .card-elevated:hover {
            box-shadow: var(--card-hover-shadow);
            transform: translateY(-4px);
        }

        /* 移动端菜单开关 */
        #mobile-menu:not(.hidden) {
            display: flex;
        }

        /* 呼吸指示灯 */
        .live-dot {
            animation: pulse-dot 1.5s infinite;
        }
        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.4; transform: scale(0.85); }
        }