/* roulang page: index */
:root {
            --primary: #0A65CC;
            --primary-hover: #084ea3;
            --secondary: #00B887;
            --accent: #FF6A00;
            --bg-base: #F8FAFC;
            --card-bg: #FFFFFF;
            --dark-bg: #0F172A;
            --text-main: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
            --border-color: #E2E8F0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: var(--bg-base);
            color: var(--text-body);
            font-family: system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }
        .hero-mask {
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.88) 0%, rgba(10, 101, 204, 0.75) 100%);
        }
        .card-custom {
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-custom:hover {
            transform: translateY(-4px);
            box-shadow: 0 20px 25px -5px rgba(10, 101, 204, 0.08), 0 8px 10px -6px rgba(10, 101, 204, 0.04);
            border-color: rgba(10, 101, 204, 0.3);
        }