/* roulang page: index */
:root {
            --bg-base: #070B14;
            --bg-card: rgba(14, 23, 38, 0.78);
            --border-glass: rgba(148, 163, 184, 0.14);
            --primary-blue: #4F46E5;
            --cyan-glow: #06B6D4;
            --rose-accent: #F43F5E;
            --text-main: #F8FAFC;
            --text-body: #94A3B8;
            --text-muted: #64748B;
        }
        body {
            background-color: var(--bg-base);
            color: var(--text-body);
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            overflow-x: hidden;
        }
        .glass-panel {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-glass);
            box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
        }
        .glow-btn {
            background: linear-gradient(135deg, #4F46E5 0%, #06B6D4 100%);
            box-shadow: 0 0 20px rgba(6, 182, 212, 0.35);
            transition: all 0.3s ease;
        }
        .glow-btn:hover {
            box-shadow: 0 0 30px rgba(6, 182, 212, 0.65);
            transform: translateY(-2px);
        }
        .eq-bar {
            width: 3px;
            background: #F43F5E;
            border-radius: 2px;
            animation: pulseHeight 1.4s ease-in-out infinite alternate;
        }
        @keyframes pulseHeight {
            0% { height: 6px; }
            100% { height: 22px; }
        }
        .waveform-bg {
            background-image: radial-gradient(rgba(79, 70, 229, 0.15) 1px, transparent 1px);
            background-size: 24px 24px;
        }

/* roulang page: article */
:root {
            --bg-base: #070B14;
            --bg-card: rgba(14, 23, 38, 0.78);
            --border-glass: rgba(148, 163, 184, 0.14);
            --primary-blue: #4F46E5;
            --cyan-glow: #06B6D4;
            --rose-accent: #F43F5E;
            --text-main: #F8FAFC;
            --text-body: #94A3B8;
            --text-muted: #64748B;
        }
        body {
            background-color: var(--bg-base);
            color: var(--text-body);
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            overflow-x: hidden;
        }
        .glow-btn {
            background: linear-gradient(135deg, #4F46E5 0%, #06B6D4 100%);
            box-shadow: 0 0 20px rgba(6, 182, 212, 0.35);
            transition: all 0.3s ease;
        }
        .glow-btn:hover {
            box-shadow: 0 0 30px rgba(6, 182, 212, 0.65);
            transform: translateY(-2px);
        }
        .waveform-bg {
            background-image: radial-gradient(rgba(79, 70, 229, 0.15) 1px, transparent 1px);
            background-size: 24px 24px;
        }
        .glass-panel {
            background: var(--bg-card);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glass);
        }
        .eq-bar {
            width: 3px;
            height: 14px;
            background: #06B6D4;
            border-radius: 2px;
            animation: bounce 1.2s infinite ease-in-out;
        }
        @keyframes bounce {
            0%, 100% { height: 4px; }
            50% { height: 16px; }
        }
        .article-content {
            font-size: 1.05rem;
            line-height: 1.85;
            color: #CBD5E1;
        }
        .article-content h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: #F8FAFC;
            margin-top: 2rem;
            margin-bottom: 1rem;
            padding-left: 0.75rem;
            border-left: 4px solid #06B6D4;
        }
        .article-content h3 {
            font-size: 1.25rem;
            font-weight: 600;
            color: #F1F5F9;
            margin-top: 1.5rem;
            margin-bottom: 0.75rem;
        }
        .article-content p {
            margin-bottom: 1.25rem;
        }
        .article-content blockquote {
            border-left: 3px solid #4F46E5;
            background: rgba(79, 70, 229, 0.08);
            padding: 1rem 1.25rem;
            margin: 1.5rem 0;
            border-radius: 0 0.75rem 0.75rem 0;
            color: #94A3B8;
        }
        .article-content pre, .article-content code {
            background: rgba(15, 23, 42, 0.9);
            border: 1px solid rgba(148, 163, 184, 0.2);
            border-radius: 0.5rem;
            color: #38BDF8;
            font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
        }
        .article-content pre {
            padding: 1rem;
            overflow-x: auto;
            margin: 1.25rem 0;
        }
        .article-content code {
            padding: 0.15rem 0.4rem;
            font-size: 0.9em;
        }
        .article-content img {
            max-width: 100%;
            height: auto;
            border-radius: 0.75rem;
            margin: 1.5rem auto;
            border: 1px solid rgba(148, 163, 184, 0.2);
        }

/* roulang page: category1 */
:root {
            --bg-base: #070B14;
            --bg-card: rgba(14, 23, 38, 0.78);
            --border-glass: rgba(148, 163, 184, 0.14);
            --primary-blue: #4F46E5;
            --cyan-glow: #06B6D4;
            --rose-accent: #F43F5E;
            --text-main: #F8FAFC;
            --text-body: #94A3B8;
            --text-muted: #64748B;
        }
        body {
            background-color: var(--bg-base);
            color: var(--text-body);
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            overflow-x: hidden;
        }
        .glass-panel {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-glass);
        }
        .glow-btn {
            background: linear-gradient(135deg, #4F46E5 0%, #06B6D4 100%);
            box-shadow: 0 0 20px rgba(6, 182, 212, 0.35);
            transition: all 0.3s ease;
        }
        .glow-btn:hover {
            box-shadow: 0 0 30px rgba(6, 182, 212, 0.65);
            transform: translateY(-2px);
        }
        .glow-btn-alt {
            background: rgba(15, 23, 42, 0.8);
            border: 1px solid rgba(6, 182, 212, 0.4);
            transition: all 0.3s ease;
        }
        .glow-btn-alt:hover {
            border-color: #06B6D4;
            box-shadow: 0 0 15px rgba(6, 182, 212, 0.3);
            color: #fff;
        }
        .eq-bar {
            width: 3px;
            height: 14px;
            background-color: #06B6D4;
            border-radius: 2px;
            animation: pulse-eq 1.2s infinite ease-in-out;
        }
        @keyframes pulse-eq {
            0%, 100% { height: 4px; }
            50% { height: 16px; }
        }
        .waveform-bg {
            background-image: radial-gradient(rgba(79, 70, 229, 0.15) 1px, transparent 1px);
            background-size: 24px 24px;
        }
        .card-hover {
            transition: all 0.3s ease;
        }
        .card-hover:hover {
            border-color: rgba(6, 182, 212, 0.4);
            box-shadow: 0 0 25px rgba(79, 70, 229, 0.25);
            transform: translateY(-3px);
        }
        .slider-pill {
            background: rgba(15, 23, 42, 0.6);
            border: 1px solid rgba(148, 163, 184, 0.2);
            transition: all 0.2s ease;
        }
        .slider-pill:hover, .slider-pill.active {
            border-color: #06B6D4;
            background: rgba(79, 70, 229, 0.25);
            color: #F8FAFC;
        }