/* roulang page: index */
:root {
            --bg-primary: #0b1120;
            --bg-secondary: #0f172a;
            --bg-card: rgba(30, 41, 59, 0.72);
            --border-card: rgba(56, 189, 248, 0.22);
            --primary-glow: #0ea5e9;
            --accent-cyan: #38bdf8;
            --text-main: #f8fafc;
            --text-muted: #94a3b8;
        }

        body {
            background-color: var(--bg-primary);
            color: var(--text-main);
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            overflow-x: hidden;
        }

        [id] {
            scroll-margin-top: 88px;
        }

        .glass-panel {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            box-shadow: 0 10px 32px 0 rgba(0, 0, 0, 0.45);
        }

        .glass-card-hover {
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .glass-card-hover:hover {
            border-color: rgba(56, 189, 248, 0.6);
            transform: translateY(-4px);
            box-shadow: 0 14px 38px 0 rgba(14, 165, 233, 0.22);
        }

        .glow-btn-primary {
            background: linear-gradient(135deg, #0284c7 0%, #0ea5e9 100%);
            box-shadow: 0 0 20px rgba(14, 165, 233, 0.45);
            transition: all 0.25s ease;
        }
        .glow-btn-primary:hover {
            box-shadow: 0 0 28px rgba(14, 165, 233, 0.75);
            transform: scale(1.02);
        }

        .glow-btn-secondary {
            border: 1px solid rgba(56, 189, 248, 0.4);
            background: rgba(15, 23, 42, 0.6);
            backdrop-filter: blur(8px);
            transition: all 0.25s ease;
        }
        .glow-btn-secondary:hover {
            border-color: #38bdf8;
            background: rgba(56, 189, 248, 0.12);
            color: #38bdf8;
        }

        .tech-gradient-text {
            background: linear-gradient(135deg, #ffffff 20%, #38bdf8 70%, #0ea5e9 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .pulse-dot {
            box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
            animation: pulse-green 2s infinite;
        }
        @keyframes pulse-green {
            0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
            70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
            100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
        }

        .accordion-content {
            transition: max-height 0.35s ease, opacity 0.3s ease;
            max-height: 0;
            overflow: hidden;
            opacity: 0;
        }
        .accordion-content.open {
            max-height: 400px;
            opacity: 1;
        }