/* roulang page: index */
:root {
            --primary: #1E40AF;
            --primary-light: #3B82F6;
            --accent: #F97316;
            --dark-bg: #0F172A;
            --light-bg: #F8FAFC;
            --text-main: #0F172A;
            --text-sub: #475569;
            --border-color: #E2E8F0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
            color: var(--text-main);
            background-color: var(--light-bg);
            -webkit-font-smoothing: antialiased;
        }

        .hero-gradient {
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.92) 0%, rgba(30, 64, 175, 0.85) 100%);
        }

        .badge-glow {
            box-shadow: 0 0 15px rgba(59, 130, 246, 0.35);
        }

        .card-hover-effect {
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-hover-effect:hover {
            transform: translateY(-5px);
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
        }

        .tab-content {
            display: none;
        }
        .tab-content.active {
            display: block;
        }

        details summary::-webkit-details-marker {
            display:none;
        }