/* roulang page: index */
:root {
            --bg-deep: #0B0F19;
            --bg-card: #111827;
            --bg-elevated: #1F2937;
            --primary: #06B6D4;
            --primary-hover: #0891B2;
            --danger: #EF4444;
            --warning: #F59E0B;
            --text-main: #F9FAFB;
            --text-sub: #9CA3AF;
            --border-dim: rgba(51, 65, 85, 0.6);
        }
        body {
            background-color: var(--bg-deep);
            color: var(--text-main);
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            overflow-x: hidden;
        }
        .hero-mesh {
            background-image: linear-gradient(180deg, rgba(11, 15, 25, 0.82) 0%, rgba(11, 15, 25, 0.96) 100%), url('/assets/images/617043d43c0de11b.jpg');
            background-size: cover;
            background-position: center;
        }
        .cta-mesh {
            background-image: linear-gradient(135deg, rgba(17, 24, 39, 0.92) 0%, rgba(8, 145, 178, 0.2) 100%), url('/assets/images/516b05957f610d56.jpg');
            background-size: cover;
            background-position: center;
        }
        .glow-cyan {
            box-shadow: 0 0 25px rgba(6, 182, 212, 0.25);
        }
        .card-cyber {
            background: rgba(17, 24, 39, 0.7);
            border: 1px solid rgba(51, 65, 85, 0.6);
            backdrop-filter: blur(12px);
            transition: all 0.3s ease;
        }
        .card-cyber:hover {
            border-color: rgba(6, 182, 212, 0.6);
            transform: translateY(-4px);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
        }

/* roulang page: article */
:root {
            --bg-deep: #0B0F19;
            --bg-card: #111827;
            --bg-elevated: #1F2937;
            --primary: #06B6D4;
            --primary-hover: #0891B2;
            --danger: #EF4444;
            --warning: #F59E0B;
            --text-main: #F9FAFB;
            --text-sub: #9CA3AF;
            --border-dim: rgba(51, 65, 85, 0.6);
        }
        body {
            background-color: var(--bg-deep);
            color: var(--text-main);
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            overflow-x: hidden;
        }
        .hero-mesh {
            background-image: linear-gradient(180deg, rgba(11, 15, 25, 0.82) 0%, rgba(11, 15, 25, 0.96) 100%), url('/assets/images/617043d43c0de11b.jpg');
            background-size: cover;
            background-position: center;
        }
        .cta-mesh {
            background-image: linear-gradient(135deg, rgba(17, 24, 39, 0.92) 0%, rgba(8, 145, 178, 0.2) 100%), url('/assets/images/516b05957f610d56.jpg');
            background-size: cover;
            background-position: center;
        }
        .card-cyber {
            background: rgba(17, 24, 39, 0.7);
            border: 1px solid rgba(51, 65, 85, 0.6);
            backdrop-filter: blur(12px);
            transition: all 0.3s ease;
        }
        .card-cyber:hover {
            border-color: rgba(6, 182, 212, 0.6);
            transform: translateY(-4px);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
        }
        .article-content {
            color: #d1d5db;
            font-size: 1.05rem;
            line-height: 1.85;
        }
        .article-content h2 {
            color: #f9fafb;
            font-size: 1.5rem;
            font-weight: 700;
            margin-top: 2rem;
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px solid rgba(51, 65, 85, 0.6);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .article-content h2::before {
            content: "";
            display: inline-block;
            width: 4px;
            height: 1.25rem;
            background: #06b6d4;
            border-radius: 2px;
        }
        .article-content h3 {
            color: #e5e7eb;
            font-size: 1.25rem;
            font-weight: 600;
            margin-top: 1.5rem;
            margin-bottom: 0.75rem;
        }
        .article-content p {
            margin-bottom: 1.25rem;
            text-align: justify;
        }
        .article-content ul, .article-content ol {
            margin-bottom: 1.25rem;
            padding-left: 1.5rem;
        }
        .article-content li {
            margin-bottom: 0.5rem;
            list-style-type: disc;
        }
        .article-content blockquote {
            border-left: 4px solid #06b6d4;
            background: rgba(17, 24, 39, 0.6);
            padding: 1rem 1.25rem;
            margin: 1.5rem 0;
            border-radius: 0 0.5rem 0.5rem 0;
            color: #9ca3af;
        }
        .article-content code {
            background: rgba(31, 41, 55, 0.8);
            color: #38bdf8;
            padding: 0.2rem 0.4rem;
            border-radius: 0.25rem;
            font-size: 0.9em;
            font-family: monospace;
        }
        .article-content pre {
            background: #0b0f19;
            border: 1px solid #1f2937;
            padding: 1rem;
            border-radius: 0.5rem;
            overflow-x: auto;
            margin-bottom: 1.25rem;
        }
        .article-content img {
            border-radius: 0.75rem;
            margin: 1.5rem 0;
            border: 1px solid rgba(51, 65, 85, 0.6);
        }

/* roulang page: category1 */
:root {
            --bg-deep: #0B0F19;
            --bg-card: #111827;
            --bg-elevated: #1F2937;
            --primary: #06B6D4;
            --primary-hover: #0891B2;
            --danger: #EF4444;
            --warning: #F59E0B;
            --text-main: #F9FAFB;
            --text-sub: #9CA3AF;
            --border-dim: rgba(51, 65, 85, 0.6);
        }
        body {
            background-color: var(--bg-deep);
            color: var(--text-main);
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            overflow-x: hidden;
        }
        .hero-mesh {
            background-image: linear-gradient(180deg, rgba(11, 15, 25, 0.88) 0%, rgba(11, 15, 25, 0.98) 100%), url('/assets/images/9a19ae60e8d2ddfc.jpg');
            background-size: cover;
            background-position: center;
        }
        .cta-mesh {
            background-image: linear-gradient(135deg, rgba(17, 24, 39, 0.95) 0%, rgba(8, 145, 178, 0.25) 100%), url('/assets/images/516b05957f610d56.jpg');
            background-size: cover;
            background-position: center;
        }
        .card-cyber {
            background: rgba(17, 24, 39, 0.7);
            border: 1px solid rgba(51, 65, 85, 0.6);
            backdrop-filter: blur(12px);
            transition: all 0.3s ease;
        }
        .card-cyber:hover {
            border-color: rgba(6, 182, 212, 0.6);
            transform: translateY(-4px);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
        }
        .filter-btn.active {
            background: rgba(6, 182, 212, 0.15);
            border-color: var(--primary);
            color: var(--primary);
            box-shadow: 0 0 12px rgba(6, 182, 212, 0.25);
        }