/* roulang page: index */
:root {
            --primary: #0F3B82;
            --primary-dark: #0B2553;
            --primary-light: #2563EB;
            --accent-cyan: #06B6D4;
            --accent-amber: #F59E0B;
            --bg-base: #F8FAFC;
            --bg-alt: #F1F5F9;
            --text-main: #0F172A;
            --text-muted: #475569;
            --card-shadow: 0 10px 30px -5px rgba(15, 59, 130, 0.06), 0 4px 12px -2px rgba(15, 59, 130, 0.03);
            --card-hover-shadow: 0 20px 35px -5px rgba(15, 59, 130, 0.12), 0 8px 16px -4px rgba(15, 59, 130, 0.05);
            --radius-md: 12px;
            --radius-lg: 16px;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
            background-color: var(--bg-base);
            color: var(--text-main);
            overflow-x: hidden;
            scroll-behavior: smooth;
        }

        .custom-card {
            background: #FFFFFF;
            border: 1px solid rgba(226, 232, 240, 0.9);
            box-shadow: var(--card-shadow);
            border-radius: var(--radius-md);
            transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        }

        .custom-card:hover {
            box-shadow: var(--card-hover-shadow);
            transform: translateY(-4px);
            border-color: rgba(37, 99, 235, 0.25);
        }

        .terminal-window {
            background: #0B1528;
            border-radius: var(--radius-md);
            box-shadow: 0 25px 50px -12px rgba(11, 21, 40, 0.35);
            border: 1px solid #1E293B;
            font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
        }

        .badge-pill {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            font-size: 13px;
            font-weight: 600;
            border-radius: 9999px;
            letter-spacing: 0.02em;
        }

        .glass-header {
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.8);
        }

        /* 隐藏原生滚动条并保持美观 */
        .no-scrollbar::-webkit-scrollbar {
            display: none;
        }
        .no-scrollbar {
            -ms-overflow-style: none;
            scrollbar-width: none;
        }

        /* 动画过渡与交互高亮 */
        .btn-primary {
            background: linear-gradient(135deg, #1E40AF 0%, #0F3B82 100%);
            transition: all 0.25s ease;
        }
        .btn-primary:hover {
            background: linear-gradient(135deg, #2563EB 0%, #1E40AF 100%);
            box-shadow: 0 8px 20px -3px rgba(30, 64, 175, 0.35);
        }

        .accordion-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
        }

        .accordion-item.active .accordion-content {
            max-height: 240px;
        }

        .accordion-item.active .accordion-icon {
            transform: rotate(180deg);
        }