/* roulang page: index */
:root {
            --primary: #0052D9;
            --accent: #00A870;
            --dark: #0F172A;
            --bg-page: #F8FAFC;
            --text-main: #0F172A;
            --text-sub: #334155;
            --text-muted: #64748B;
            --border-light: #E2E8F0;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-page);
            color: var(--text-main);
            overflow-x: hidden;
        }
        .text-gradient {
            background: linear-gradient(135deg, #0052D9 0%, #00A870 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .card-transition {
            transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.28s cubic-bezier(0.4, 0, 0.2, 1), border-color 0.28s ease;
        }
        .card-transition:hover {
            transform: translateY(-4px);
        }