/* roulang page: index */
:root {
            --bg-base: #F8FAFC;
            --text-main: #0F172A;
            --text-muted: #64748B;
            --border-light: #E2E8F0;
            --accent-emerald: #10B981;
            --accent-cyan: #06B6D4;
        }

        body {
            background-color: var(--bg-base);
            color: var(--text-main);
            font-family: Inter, -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            -webkit-font-smoothing: antialiased;
        }

        .code-font {
            font-family: 'JetBrains Mono', 'Fira Code', Menlo, monospace;
        }

        .custom-card {
            background: #FFFFFF;
            border: 1px solid var(--border-light);
            border-radius: 1rem;
            transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
        }

        .custom-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 16px 32px -8px rgba(15, 23, 42, 0.08);
            border-color: #CBD5E1;
        }

        .hero-terminal {
            background: rgba(11, 15, 25, 0.92);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 255, 255, 0.12);
        }

        /* 呼吸效果微动效 */
        @keyframes pulse-ring {
            0% { transform: scale(0.95); opacity: 0.8; }
            50% { transform: scale(1.05); opacity: 0.4; }
            100% { transform: scale(0.95); opacity: 0.8; }
        }
        .pulse-effect {
            animation: pulse-ring 3s infinite ease-in-out;
        }