/* roulang page: index */
:root {
            --primary: #635BFF;
            --accent: #00F5A0;
            --dark: #0D0F17;
            --light-bg: #F8F9FD;
        }
        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: #1A1D26;
            background-color: var(--light-bg);
            overflow-x: hidden;
        }
        .hero-diagonal-bg {
            clip-path: polygon(0 0, 100% 0, 100% 88%, 0 100%);
        }
        @media (max-width: 768px) {
            .hero-diagonal-bg {
                clip-path: polygon(0 0, 100% 0, 100% 95%, 0 100%);
            }
        }
        .glass-card {
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(226, 232, 240, 0.8);
        }
        .dark-glass-card {
            background: rgba(22, 25, 38, 0.85);
            backdrop-filter: blur(14px);
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        details > summary::-webkit-details-marker {
            display: none;
        }
        .tab-btn.active {
            background-color: #635BFF;
            color: #ffffff;
            box-shadow: 0 4px 14px rgba(99, 91, 255, 0.35);
        }