/* roulang page: index */
:root {
            --primary: #1D4ED8;
            --accent: #06B6D4;
            --bg-light: #F8FAFC;
            --text-main: #0F172A;
            --text-muted: #64748B;
            --border-color: #E2E8F0;
        }
        html {
            scroll-behavior: smooth;
            font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
        }
        .hero-bg {
            background: linear-gradient(180deg, rgba(15, 23, 42, 0.75) 0%, rgba(15, 23, 42, 0.92) 100%), url('/assets/images/023a48c14b0b7d61.png') center/cover no-repeat;
        }
        .card-shadow {
            box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-shadow:hover {
            box-shadow: 0 12px 28px -4px rgba(29, 78, 216, 0.12);
            transform: translateY(-4px);
        }
        .pulse-dot {
            animation: pulse-glow 2s infinite;
        }
        @keyframes pulse-glow {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(1.1); }
        }