/* roulang page: index */
:root {
            --color-primary: #4c6ef5;
            --color-primary-light: #748ffc;
            --color-primary-dark: #364fc7;
            --color-accent: #f59e0b;
            --color-accent-light: #fcc419;
            --color-bg: #0f0f1a;
            --color-surface: #1a1a2e;
            --color-surface-light: #222240;
            --color-surface-hover: #282850;
            --color-text: #e8e8f0;
            --color-text-weak: #9a9ab8;
            --color-text-muted: #6a6a88;
            --color-border: #2a2a48;
            --color-border-light: #3a3a58;
            --color-success: #22c55e;
            --color-danger: #ef4444;
            --color-info: #3b82f6;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 18px;
            --radius-xl: 24px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.25);
            --shadow-md: 0 6px 24px rgba(0,0,0,0.35);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.5);
            --shadow-glow: 0 0 30px rgba(76,110,245,0.3);
            --shadow-gold: 0 0 25px rgba(245,158,11,0.25);
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --font-mono: 'JetBrains Mono', 'SF Mono', 'Consolas', monospace;
            --transition-fast: 0.18s ease;
            --transition-base: 0.28s ease;
            --transition-slow: 0.4s ease;
        }

        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            line-height: 1.65;
            color: var(--color-text);
            background-color: var(--color-bg);
            overflow-x: hidden;
            min-height: 100vh;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--color-primary-light);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        button:focus-visible,
        a:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--color-primary-light);
            outline-offset: 3px;
            border-radius: 4px;
        }

        .container {
            width: 100%;
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ========== HEADER / NAV ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(15,15,26,0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--color-border);
            transition: background var(--transition-base), box-shadow var(--transition-base);
        }
        .site-header.scrolled {
            box-shadow: var(--shadow-md);
            background: rgba(15,15,26,0.95);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            gap: 20px;
        }
        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.25rem;
            color: #fff;
            white-space: nowrap;
            letter-spacing: -0.01em;
            flex-shrink: 0;
        }
        .header-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--color-primary), #7c3aed);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: #fff;
            box-shadow: var(--shadow-glow);
        }
        .header-nav {
            display: flex;
            align-items: center;
            gap: 0;
            background: var(--color-surface);
            border-radius: 30px;
            padding: 4px;
            border: 1px solid var(--color-border);
        }
        .nav-chip {
            display: inline-flex;
            align-items: center;
            padding: 8px 20px;
            border-radius: 26px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-text-weak);
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
            cursor: pointer;
            text-decoration: none;
        }
        .nav-chip:hover {
            color: var(--color-text);
            background: rgba(255,255,255,0.04);
        }
        .nav-chip.active {
            background: var(--color-primary);
            color: #fff;
            font-weight: 600;
            box-shadow: var(--shadow-glow);
        }
        .header-cta {
            flex-shrink: 0;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: 28px;
            font-weight: 600;
            font-size: 0.9rem;
            background: linear-gradient(135deg, var(--color-primary), #6366f1);
            color: #fff;
            border: none;
            transition: all var(--transition-base);
            box-shadow: 0 4px 16px rgba(76,110,245,0.35);
            white-space: nowrap;
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(76,110,245,0.5);
            color: #fff;
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(76,110,245,0.3);
        }
        .btn-accent {
            background: linear-gradient(135deg, var(--color-accent), #e67700);
            box-shadow: 0 4px 16px rgba(245,158,11,0.35);
        }
        .btn-accent:hover {
            box-shadow: 0 8px 28px rgba(245,158,11,0.5);
        }
        .btn-outline {
            background: transparent;
            border: 2px solid var(--color-primary);
            color: var(--color-primary-light);
            box-shadow: none;
        }
        .btn-outline:hover {
            background: var(--color-primary);
            color: #fff;
            box-shadow: var(--shadow-glow);
        }
        .btn-lg {
            padding: 13px 30px;
            font-size: 1rem;
            border-radius: 30px;
        }
        .btn-sm {
            padding: 7px 16px;
            font-size: 0.8rem;
            border-radius: 22px;
        }
        .mobile-menu-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--color-text);
            background: var(--color-surface);
            border: 1px solid var(--color-border);
        }
        @media (max-width: 768px) {
            .header-nav {
                display: none;
                position: absolute;
                top: 70px;
                left: 16px;
                right: 16px;
                flex-direction: column;
                border-radius: var(--radius-lg);
                padding: 8px;
                gap: 2px;
                background: var(--color-surface);
                border: 1px solid var(--color-border);
                box-shadow: var(--shadow-lg);
                z-index: 1001;
            }
            .header-nav.open {
                display: flex;
            }
            .nav-chip {
                width: 100%;
                justify-content: center;
                padding: 12px 20px;
                border-radius: var(--radius-md);
            }
            .mobile-menu-toggle {
                display: flex;
            }
            .header-cta {
                display: none;
            }
            .header-cta-mobile {
                display: block;
                padding: 8px 0;
                width: 100%;
            }
            .header-cta-mobile .btn-primary {
                width: 100%;
                justify-content: center;
            }
        }
        @media (min-width: 769px) {
            .header-cta-mobile {
                display: none;
            }
            .header-nav {
                display: flex !important;
            }
        }

        /* ========== HERO ========== */
        .hero-section {
            position: relative;
            padding: 80px 0 100px;
            min-height: 580px;
            display: flex;
            align-items: center;
            overflow: hidden;
            background: linear-gradient(180deg, #0f0f1a 0%, #14142a 40%, #1a1a35 100%);
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            z-index: 0;
            opacity: 0.35;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            filter: saturate(0.6) brightness(0.7);
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            z-index: 1;
            background: radial-gradient(ellipse at 30% 50%, rgba(76,110,245,0.18) 0%, transparent 60%),
                        radial-gradient(ellipse at 70% 30%, rgba(245,158,11,0.1) 0%, transparent 50%),
                        linear-gradient(180deg, rgba(15,15,26,0.3) 0%, rgba(15,15,26,0.7) 100%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 700px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: 20px;
            background: rgba(76,110,245,0.15);
            border: 1px solid rgba(76,110,245,0.3);
            font-size: 0.8rem;
            font-weight: 500;
            color: var(--color-primary-light);
            margin-bottom: 20px;
            letter-spacing: 0.02em;
        }
        .hero-badge .dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: #22c55e;
            animation: pulse-dot 2s infinite;
        }
        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(1.6); }
        }
        .hero-title {
            font-size: clamp(2rem, 4.5vw, 3.4rem);
            font-weight: 800;
            line-height: 1.2;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: -0.02em;
        }
        .hero-title .highlight {
            background: linear-gradient(135deg, #f59e0b, #fcc419);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-desc {
            font-size: 1.1rem;
            color: var(--color-text-weak);
            margin-bottom: 32px;
            max-width: 520px;
            line-height: 1.7;
        }
        .hero-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }
        @media (max-width: 520px) {
            .hero-section {
                padding: 50px 0 70px;
                min-height: auto;
            }
            .hero-buttons {
                flex-direction: column;
            }
            .hero-buttons .btn-primary,
            .hero-buttons .btn-outline {
                width: 100%;
                justify-content: center;
            }
        }

        /* ========== SECTION COMMON ========== */
        .section {
            padding: 72px 0;
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--color-primary-light);
            text-transform: uppercase;
            letter-spacing: 0.08em;
            margin-bottom: 10px;
        }
        .section-title {
            font-size: clamp(1.5rem, 2.8vw, 2.2rem);
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
            letter-spacing: -0.01em;
        }
        .section-desc {
            font-size: 0.95rem;
            color: var(--color-text-weak);
            max-width: 560px;
            margin: 0 auto;
        }

        /* ========== FEATURES CARDS ========== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--color-primary), #7c3aed);
            opacity: 0;
            transition: opacity var(--transition-base);
            border-radius: 0 0 2px 2px;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--color-border-light);
            background: var(--color-surface-light);
        }
        .feature-card:hover::before {
            opacity: 1;
        }
        .feature-card .card-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            margin-bottom: 18px;
            background: rgba(76,110,245,0.12);
            color: var(--color-primary-light);
        }
        .feature-card:nth-child(2) .card-icon {
            background: rgba(245,158,11,0.12);
            color: var(--color-accent-light);
        }
        .feature-card:nth-child(3) .card-icon {
            background: rgba(34,197,94,0.12);
            color: var(--color-success);
        }
        .feature-card .card-img {
            width: 100%;
            height: 160px;
            object-fit: cover;
            border-radius: var(--radius-md);
            margin-bottom: 18px;
        }
        .feature-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }
        .feature-card p {
            font-size: 0.88rem;
            color: var(--color-text-weak);
            line-height: 1.6;
        }
        @media (max-width: 768px) {
            .features-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .feature-card {
                padding: 24px 20px;
            }
        }
        @media (min-width: 769px) and (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        /* ========== CATEGORY ENTRY ========== */
        .category-entry-card {
            display: flex;
            align-items: center;
            gap: 28px;
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-xl);
            padding: 28px 32px;
            transition: all var(--transition-base);
            cursor: pointer;
            text-decoration: none;
            color: inherit;
        }
        .category-entry-card:hover {
            border-color: var(--color-primary);
            box-shadow: var(--shadow-glow);
            transform: translateY(-3px);
            background: var(--color-surface-light);
        }
        .category-entry-card .cat-thumb {
            width: 100px;
            height: 100px;
            border-radius: var(--radius-lg);
            object-fit: cover;
            flex-shrink: 0;
        }
        .category-entry-card .cat-info h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 6px;
        }
        .category-entry-card .cat-info p {
            font-size: 0.88rem;
            color: var(--color-text-weak);
            line-height: 1.5;
        }
        .category-entry-card .cat-arrow {
            margin-left: auto;
            font-size: 1.3rem;
            color: var(--color-primary-light);
            flex-shrink: 0;
            transition: transform var(--transition-fast);
        }
        .category-entry-card:hover .cat-arrow {
            transform: translateX(5px);
        }
        @media (max-width: 520px) {
            .category-entry-card {
                flex-direction: column;
                text-align: center;
                padding: 24px 20px;
            }
            .category-entry-card .cat-arrow {
                margin-left: 0;
            }
            .category-entry-card .cat-thumb {
                width: 80px;
                height: 80px;
            }
        }

        /* ========== HUD STATS PANEL ========== */
        .hud-panel {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-xl);
            padding: 40px 36px;
            position: relative;
            overflow: hidden;
        }
        .hud-panel::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--color-primary), var(--color-accent), transparent);
            opacity: 0.7;
        }
        .hud-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            text-align: center;
        }
        .hud-stat .stat-value {
            font-family: var(--font-mono);
            font-size: 2.2rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.02em;
            line-height: 1;
            margin-bottom: 6px;
        }
        .hud-stat .stat-value.gold {
            color: var(--color-accent);
        }
        .hud-stat .stat-label {
            font-size: 0.8rem;
            color: var(--color-text-muted);
            letter-spacing: 0.04em;
        }
        @media (max-width: 768px) {
            .hud-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
            .hud-panel {
                padding: 28px 20px;
            }
            .hud-stat .stat-value {
                font-size: 1.6rem;
            }
        }

        /* ========== NEWS LIST ========== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .news-card {
            display: flex;
            gap: 18px;
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 18px 20px;
            transition: all var(--transition-base);
            text-decoration: none;
            color: inherit;
            align-items: flex-start;
        }
        .news-card:hover {
            border-color: var(--color-primary);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            background: var(--color-surface-light);
        }
        .news-card .news-thumb {
            width: 90px;
            height: 70px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            flex-shrink: 0;
        }
        .news-card .news-info {
            flex: 1;
            min-width: 0;
        }
        .news-card .news-tag {
            display: inline-block;
            font-size: 0.7rem;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 12px;
            background: rgba(76,110,245,0.15);
            color: var(--color-primary-light);
            margin-bottom: 6px;
        }
        .news-card h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 4px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card .news-date {
            font-size: 0.75rem;
            color: var(--color-text-muted);
        }
        .news-empty {
            text-align: center;
            padding: 48px 24px;
            color: var(--color-text-weak);
            font-size: 0.95rem;
            grid-column: 1 / -1;
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            border: 1px dashed var(--color-border);
        }
        @media (max-width: 768px) {
            .news-grid {
                grid-template-columns: 1fr;
            }
            .news-card {
                flex-direction: column;
            }
            .news-card .news-thumb {
                width: 100%;
                height: 140px;
            }
        }

        /* ========== PROCESS / PATH ========== */
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            position: relative;
        }
        .process-step {
            text-align: center;
            position: relative;
            z-index: 1;
        }
        .process-step .step-number {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--color-surface);
            border: 2px solid var(--color-border);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.2rem;
            color: var(--color-primary-light);
            margin: 0 auto 16px;
            transition: all var(--transition-base);
            position: relative;
        }
        .process-step:hover .step-number {
            border-color: var(--color-primary);
            box-shadow: var(--shadow-glow);
            background: var(--color-surface-light);
        }
        .process-step h4 {
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 4px;
        }
        .process-step p {
            font-size: 0.8rem;
            color: var(--color-text-weak);
        }
        .process-connector {
            display: none;
        }
        @media (max-width: 768px) {
            .process-steps {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px 16px;
            }
        }
        @media (max-width: 420px) {
            .process-steps {
                grid-template-columns: 1fr;
            }
        }

        /* ========== COMPARE PANEL ========== */
        .compare-panel {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .compare-col {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
        }
        .compare-col.featured {
            border-color: var(--color-primary);
            box-shadow: var(--shadow-glow);
            position: relative;
            background: var(--color-surface-light);
        }
        .compare-col.featured::before {
            content: '推荐';
            position: absolute;
            top: -14px;
            left: 28px;
            background: linear-gradient(135deg, var(--color-primary), #7c3aed);
            color: #fff;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 5px 14px;
            border-radius: 14px;
            letter-spacing: 0.04em;
        }
        .compare-col h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .compare-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .compare-list li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.88rem;
            color: var(--color-text-weak);
        }
        .compare-list li .check {
            color: var(--color-success);
            font-size: 0.9rem;
            flex-shrink: 0;
        }
        .compare-list li .cross {
            color: var(--color-danger);
            font-size: 0.9rem;
            flex-shrink: 0;
        }
        @media (max-width: 640px) {
            .compare-panel {
                grid-template-columns: 1fr;
            }
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-fast);
        }
        .faq-item:hover {
            border-color: var(--color-border-light);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            font-weight: 600;
            font-size: 0.95rem;
            color: #fff;
            text-align: left;
            cursor: pointer;
            background: none;
            border: none;
            transition: color var(--transition-fast);
        }
        .faq-question:hover {
            color: var(--color-primary-light);
        }
        .faq-question .faq-icon {
            transition: transform var(--transition-fast);
            font-size: 0.8rem;
            color: var(--color-text-muted);
            flex-shrink: 0;
            margin-left: 12px;
        }
        .faq-item.open .faq-question .faq-icon {
            transform: rotate(180deg);
            color: var(--color-primary-light);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-slow);
            padding: 0 22px;
            font-size: 0.88rem;
            color: var(--color-text-weak);
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 22px 18px;
        }

        /* ========== CTA ========== */
        .cta-section {
            background: linear-gradient(180deg, var(--color-surface) 0%, #141428 100%);
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
            text-align: center;
            padding: 64px 0;
        }
        .cta-section .cta-glow {
            position: relative;
            display: inline-block;
        }
        .cta-section .cta-glow::after {
            content: '';
            position: absolute;
            inset: -20px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(76,110,245,0.25) 0%, transparent 70%);
            z-index: -1;
            animation: glow-pulse 3s ease-in-out infinite;
        }
        @keyframes glow-pulse {
            0%, 100% { opacity: 0.4; transform: scale(0.9); }
            50% { opacity: 0.8; transform: scale(1.05); }
        }
        .cta-title {
            font-size: clamp(1.3rem, 2.4vw, 1.8rem);
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }
        .cta-desc {
            font-size: 0.95rem;
            color: var(--color-text-weak);
            margin-bottom: 28px;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--color-surface-950);
            border-top: 1px solid var(--color-border);
            padding: 40px 0 24px;
        }
        .footer-inner {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 32px;
            margin-bottom: 28px;
        }
        .footer-brand {
            max-width: 280px;
        }
        .footer-brand .footer-logo {
            font-weight: 700;
            font-size: 1.15rem;
            color: #fff;
            margin-bottom: 8px;
        }
        .footer-brand p {
            font-size: 0.8rem;
            color: var(--color-text-muted);
            line-height: 1.6;
        }
        .footer-links {
            display: flex;
            gap: 48px;
            flex-wrap: wrap;
        }
        .footer-links h5 {
            font-size: 0.85rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 12px;
        }
        .footer-links ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .footer-links ul li a {
            font-size: 0.8rem;
            color: var(--color-text-muted);
            transition: color var(--transition-fast);
        }
        .footer-links ul li a:hover {
            color: var(--color-primary-light);
        }
        .footer-bottom {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid var(--color-border);
            font-size: 0.78rem;
            color: var(--color-text-muted);
        }
        @media (max-width: 640px) {
            .footer-inner {
                flex-direction: column;
                gap: 24px;
            }
            .footer-links {
                gap: 24px;
            }
        }

        /* ========== UTILS ========== */
        .text-gradient {
            background: linear-gradient(135deg, #f59e0b, #fcc419);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0,0,0,0);
            white-space: nowrap;
            border: 0;
        }
        @media (prefers-reduced-motion: reduce) {
            *, *::before, *::after {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
            }
        }

/* roulang page: article */
:root {
            --color-primary: #FF5C00;
            --color-primary-hover: #FF7B33;
            --color-primary-glow: rgba(255, 92, 0, 0.35);
            --color-accent: #00E5FF;
            --color-accent-glow: rgba(0, 229, 255, 0.3);
            --color-bg: #0A0E1A;
            --color-bg-elevated: #111827;
            --color-bg-card: #161B28;
            --color-bg-card-hover: #1C2335;
            --color-bg-surface: #1A2030;
            --color-text: #E8ECF2;
            --color-text-secondary: #9CA3B2;
            --color-text-muted: #6B7280;
            --color-border: rgba(255, 255, 255, 0.08);
            --color-border-light: rgba(255, 255, 255, 0.13);
            --color-border-glow: rgba(255, 92, 0, 0.25);
            --color-success: #10B981;
            --color-warning: #F59E0B;
            --color-danger: #EF4444;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-full: 9999px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.5);
            --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.6);
            --shadow-glow: 0 0 20px var(--color-primary-glow);
            --shadow-accent-glow: 0 0 18px var(--color-accent-glow);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, sans-serif;
            --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', 'Consolas', monospace;
            --transition-fast: 0.18s ease;
            --transition-base: 0.28s ease;
            --transition-slow: 0.4s ease;
            --header-height: 68px;
            --container-max: 1200px;
            --container-narrow: 820px;
            --container-wide: 1280px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            min-height: 100vh;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--color-primary-hover);
        }
        a:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 3px;
            border-radius: 4px;
        }

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
        }
        button:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 3px;
            border-radius: 4px;
        }

        input {
            font-family: inherit;
        }

        ul,
        ol {
            list-style: none;
        }

        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        .container-narrow {
            max-width: var(--container-narrow);
        }
        .container-wide {
            max-width: var(--container-wide);
        }

        /* ========== HEADER / NAV ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(10, 14, 26, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--color-border);
            height: var(--header-height);
            display: flex;
            align-items: center;
            transition: background var(--transition-base);
        }
        .site-header.scrolled {
            background: rgba(10, 14, 26, 0.96);
            border-bottom-color: var(--color-border-light);
            box-shadow: var(--shadow-md);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            height: 100%;
        }
        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.2rem;
            color: var(--color-text);
            white-space: nowrap;
            flex-shrink: 0;
            transition: opacity var(--transition-fast);
        }
        .header-logo:hover {
            opacity: 0.85;
            color: var(--color-text);
        }
        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: var(--radius-md);
            background: linear-gradient(135deg, var(--color-primary), #E04E00);
            color: #fff;
            font-size: 1rem;
            box-shadow: var(--shadow-glow);
            flex-shrink: 0;
        }
        .header-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .nav-chip {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            border-radius: var(--radius-full);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            background: transparent;
            border: 1px solid transparent;
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }
        .nav-chip:hover {
            color: var(--color-text);
            background: var(--color-bg-card);
            border-color: var(--color-border-light);
        }
        .nav-chip.active {
            color: #fff;
            background: var(--color-primary);
            border-color: var(--color-primary);
            font-weight: 600;
            box-shadow: var(--shadow-glow);
        }
        .nav-chip.active:hover {
            background: var(--color-primary-hover);
            border-color: var(--color-primary-hover);
            color: #fff;
        }
        .header-cta {
            flex-shrink: 0;
        }
        .header-cta-mobile {
            display: none;
        }
        .mobile-menu-toggle {
            display: none;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-md);
            color: var(--color-text);
            font-size: 1.3rem;
            border: 1px solid var(--color-border-light);
            background: var(--color-bg-card);
            flex-shrink: 0;
            transition: all var(--transition-fast);
        }
        .mobile-menu-toggle:hover {
            border-color: var(--color-primary);
            color: var(--color-primary);
        }

        /* ========== BUTTONS ========== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 0.95rem;
            letter-spacing: 0.01em;
            transition: all var(--transition-base);
            white-space: nowrap;
            text-decoration: none;
        }
        .btn-accent {
            background: linear-gradient(135deg, var(--color-primary), #E04E00);
            color: #fff;
            border: none;
            box-shadow: 0 2px 12px var(--color-primary-glow);
        }
        .btn-accent:hover {
            background: linear-gradient(135deg, var(--color-primary-hover), #F06020);
            box-shadow: 0 4px 22px var(--color-primary-glow);
            transform: translateY(-1px);
            color: #fff;
        }
        .btn-outline {
            background: transparent;
            color: var(--color-text);
            border: 1.5px solid var(--color-border-light);
        }
        .btn-outline:hover {
            border-color: var(--color-primary);
            color: var(--color-primary);
            background: rgba(255, 92, 0, 0.06);
        }
        .btn-glow {
            background: transparent;
            color: var(--color-accent);
            border: 1.5px solid var(--color-accent);
            box-shadow: 0 0 14px var(--color-accent-glow);
        }
        .btn-glow:hover {
            background: rgba(0, 229, 255, 0.08);
            box-shadow: 0 0 24px var(--color-accent-glow);
            color: var(--color-accent);
        }
        .btn-lg {
            padding: 13px 30px;
            font-size: 1.05rem;
            border-radius: var(--radius-full);
        }
        .btn-sm {
            padding: 6px 14px;
            font-size: 0.82rem;
            border-radius: var(--radius-full);
        }

        /* ========== ARTICLE HERO BANNER ========== */
        .article-banner {
            position: relative;
            padding: 60px 0 40px;
            background: linear-gradient(180deg, rgba(17, 24, 39, 0.95) 0%, rgba(10, 14, 26, 0.98) 100%);
            border-bottom: 1px solid var(--color-border);
            overflow: hidden;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.18;
            z-index: 0;
            pointer-events: none;
        }
        .article-banner::after {
            content: '';
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 600px;
            height: 3px;
            background: linear-gradient(90deg, transparent, var(--color-primary), var(--color-accent), var(--color-primary), transparent);
            opacity: 0.7;
            z-index: 1;
        }
        .article-banner-content {
            position: relative;
            z-index: 2;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--color-text-muted);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--color-text-secondary);
            transition: color var(--transition-fast);
        }
        .breadcrumb a:hover {
            color: var(--color-primary);
        }
        .breadcrumb .separator {
            color: var(--color-text-muted);
            font-size: 0.7rem;
        }
        .breadcrumb .current {
            color: var(--color-text);
            font-weight: 500;
        }
        .article-banner .article-meta-top {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
            margin-bottom: 12px;
        }
        .category-tag {
            display: inline-flex;
            align-items: center;
            padding: 5px 14px;
            border-radius: var(--radius-full);
            font-size: 0.8rem;
            font-weight: 600;
            background: rgba(255, 92, 0, 0.15);
            color: var(--color-primary);
            border: 1px solid rgba(255, 92, 0, 0.3);
            letter-spacing: 0.02em;
        }
        .article-date {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            display: flex;
            align-items: center;
            gap: 5px;
        }
        .article-banner h1 {
            font-size: 2.2rem;
            font-weight: 800;
            line-height: 1.3;
            color: #fff;
            letter-spacing: -0.01em;
            max-width: 800px;
        }

        /* ========== ARTICLE MAIN ========== */
        .article-main {
            padding: 48px 0 60px;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            align-items: start;
        }
        .article-body {
            background: var(--color-bg-card);
            border-radius: var(--radius-lg);
            padding: 40px;
            border: 1px solid var(--color-border);
            position: relative;
            overflow: hidden;
        }
        .article-body::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--color-primary), var(--color-accent), transparent);
            opacity: 0.6;
        }
        .article-featured-image {
            border-radius: var(--radius-md);
            overflow: hidden;
            margin-bottom: 28px;
            border: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-md);
        }
        .article-featured-image img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
        }
        .article-content {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--color-text);
        }
        .article-content h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: #fff;
            margin: 36px 0 16px;
            padding-left: 14px;
            border-left: 3px solid var(--color-primary);
        }
        .article-content h3 {
            font-size: 1.2rem;
            font-weight: 600;
            color: #fff;
            margin: 28px 0 12px;
        }
        .article-content p {
            margin-bottom: 16px;
            color: var(--color-text);
        }
        .article-content ul,
        .article-content ol {
            margin: 12px 0 20px;
            padding-left: 24px;
        }
        .article-content li {
            margin-bottom: 8px;
            position: relative;
            list-style-type: disc;
            color: var(--color-text);
        }
        .article-content blockquote {
            border-left: 3px solid var(--color-accent);
            background: rgba(0, 229, 255, 0.04);
            padding: 16px 20px;
            margin: 20px 0;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            color: var(--color-text-secondary);
            font-style: italic;
        }
        .article-content code {
            background: var(--color-bg-surface);
            padding: 3px 8px;
            border-radius: 4px;
            font-family: var(--font-mono);
            font-size: 0.9em;
            color: var(--color-accent);
        }
        .article-content pre {
            background: var(--color-bg-surface);
            padding: 20px;
            border-radius: var(--radius-md);
            overflow-x: auto;
            margin: 16px 0;
            border: 1px solid var(--color-border);
            font-family: var(--font-mono);
            font-size: 0.9em;
        }
        .article-divider {
            border: none;
            border-top: 1px solid var(--color-border);
            margin: 32px 0;
        }
        .article-footer-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            padding-top: 20px;
            border-top: 1px solid var(--color-border);
            margin-top: 32px;
            color: var(--color-text-muted);
            font-size: 0.88rem;
        }

        /* ========== SIDEBAR ========== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 24px;
            position: sticky;
            top: calc(var(--header-height) + 24px);
        }
        .sidebar-card {
            background: var(--color-bg-card);
            border-radius: var(--radius-lg);
            padding: 24px;
            border: 1px solid var(--color-border);
        }
        .sidebar-card h4 {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h4 .indicator {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--color-accent);
            box-shadow: 0 0 8px var(--color-accent-glow);
            animation: pulse-dot 2s infinite;
        }
        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
                box-shadow: 0 0 8px var(--color-accent-glow);
            }
            50% {
                opacity: 0.4;
                box-shadow: 0 0 18px var(--color-accent-glow);
            }
        }
        .sidebar-card .stat-row {
            display: flex;
            justify-content: space-between;
            padding: 10px 0;
            border-bottom: 1px solid var(--color-border);
            font-size: 0.9rem;
        }
        .sidebar-card .stat-row:last-child {
            border-bottom: none;
        }
        .sidebar-card .stat-label {
            color: var(--color-text-muted);
        }
        .sidebar-card .stat-value {
            font-weight: 600;
            color: var(--color-text);
            font-family: var(--font-mono);
        }
        .sidebar-card .stat-value.highlight {
            color: var(--color-accent);
        }
        .sidebar-cta-mini {
            background: linear-gradient(135deg, rgba(255, 92, 0, 0.12), rgba(255, 92, 0, 0.04));
            border: 1px solid var(--color-border-glow);
            border-radius: var(--radius-lg);
            padding: 22px 20px;
            text-align: center;
        }
        .sidebar-cta-mini p {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            margin-bottom: 14px;
            line-height: 1.5;
        }

        /* ========== RELATED POSTS ========== */
        .related-section {
            padding: 60px 0;
            background: var(--color-bg-elevated);
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.78rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--color-accent);
            margin-bottom: 8px;
        }
        .section-label .label-line {
            width: 28px;
            height: 2px;
            background: var(--color-accent);
            border-radius: 2px;
        }
        .section-title {
            font-size: 1.8rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 36px;
            letter-spacing: -0.01em;
        }
        .post-cards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .post-card {
            background: var(--color-bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--color-border);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            text-decoration: none;
            color: inherit;
        }
        .post-card:hover {
            border-color: var(--color-border-glow);
            box-shadow: var(--shadow-lg), 0 0 30px rgba(255, 92, 0, 0.08);
            transform: translateY(-3px);
            background: var(--color-bg-card-hover);
        }
        .post-card-image {
            aspect-ratio: 16 / 10;
            overflow: hidden;
            position: relative;
        }
        .post-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .post-card:hover .post-card-image img {
            transform: scale(1.06);
        }
        .post-card-image .card-category-overlay {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(0, 0, 0, 0.7);
            backdrop-filter: blur(6px);
            padding: 4px 10px;
            border-radius: var(--radius-full);
            font-size: 0.72rem;
            font-weight: 600;
            color: var(--color-primary);
            letter-spacing: 0.03em;
        }
        .post-card-body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .post-card-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: #fff;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .post-card-body .card-excerpt {
            font-size: 0.88rem;
            color: var(--color-text-muted);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }
        .post-card-body .card-date {
            font-size: 0.78rem;
            color: var(--color-text-muted);
            display: flex;
            align-items: center;
            gap: 4px;
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            padding: 70px 0;
            position: relative;
            overflow: hidden;
            background: var(--color-bg);
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: 0.12;
            z-index: 0;
            pointer-events: none;
        }
        .cta-inner {
            position: relative;
            z-index: 1;
            background: var(--color-bg-card);
            border-radius: var(--radius-xl);
            padding: 50px 48px;
            border: 1px solid var(--color-border-light);
            text-align: center;
            max-width: 700px;
            margin: 0 auto;
            box-shadow: var(--shadow-lg);
        }
        .cta-inner h2 {
            font-size: 1.9rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: -0.01em;
        }
        .cta-inner p {
            color: var(--color-text-secondary);
            font-size: 1.05rem;
            margin-bottom: 28px;
            line-height: 1.7;
        }
        .cta-buttons {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ========== FAQ ========== */
        .faq-section {
            padding: 60px 0;
            background: var(--color-bg-elevated);
            border-top: 1px solid var(--color-border);
        }
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--color-bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            overflow: hidden;
            transition: all var(--transition-fast);
        }
        .faq-item:hover {
            border-color: var(--color-border-light);
        }
        .faq-question {
            width: 100%;
            text-align: left;
            padding: 18px 22px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-text);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            background: transparent;
            transition: color var(--transition-fast);
        }
        .faq-question:hover {
            color: #fff;
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: var(--color-bg-surface);
            color: var(--color-text-muted);
            font-size: 0.75rem;
            transition: all var(--transition-fast);
        }
        .faq-item.open .faq-question .faq-icon {
            background: var(--color-primary);
            color: #fff;
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-base);
            padding: 0 22px;
            color: var(--color-text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 22px 18px;
        }

        /* ========== NOT FOUND STATE ========== */
        .not-found-state {
            text-align: center;
            padding: 80px 0;
        }
        .not-found-state .nf-icon {
            font-size: 3.5rem;
            color: var(--color-text-muted);
            margin-bottom: 20px;
            display: block;
        }
        .not-found-state h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }
        .not-found-state p {
            color: var(--color-text-secondary);
            margin-bottom: 24px;
            font-size: 1rem;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--color-bg);
            border-top: 1px solid var(--color-border);
            padding: 48px 0 28px;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 1.5fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        .footer-brand .footer-logo {
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }
        .footer-brand p {
            color: var(--color-text-muted);
            font-size: 0.92rem;
            line-height: 1.7;
            max-width: 420px;
        }
        .footer-links {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .footer-links h5 {
            font-size: 0.9rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            text-transform: uppercase;
            letter-spacing: 0.04em;
        }
        .footer-links ul {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-links ul li a {
            font-size: 0.9rem;
            color: var(--color-text-muted);
            transition: color var(--transition-fast);
        }
        .footer-links ul li a:hover {
            color: var(--color-primary);
        }
        .footer-bottom {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid var(--color-border);
            font-size: 0.85rem;
            color: var(--color-text-muted);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .article-sidebar {
                position: static;
                flex-direction: row;
                flex-wrap: wrap;
                gap: 16px;
            }
            .article-sidebar>* {
                flex: 1;
                min-width: 220px;
            }
            .post-cards-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .header-nav {
                gap: 3px;
            }
            .nav-chip {
                padding: 7px 12px;
                font-size: 0.82rem;
            }
            .article-banner h1 {
                font-size: 1.7rem;
            }
            .article-body {
                padding: 28px 24px;
            }
        }

        @media (max-width: 768px) {
            .header-nav {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(10, 14, 26, 0.97);
                backdrop-filter: blur(18px);
                flex-direction: column;
                padding: 16px 20px;
                gap: 8px;
                border-bottom: 1px solid var(--color-border-light);
                box-shadow: var(--shadow-lg);
                z-index: 999;
            }
            .header-nav.open {
                display: flex;
            }
            .header-nav .header-cta-mobile {
                display: block;
                margin-top: 8px;
            }
            .header-cta {
                display: none;
            }
            .mobile-menu-toggle {
                display: flex;
            }
            .nav-chip {
                width: 100%;
                justify-content: center;
                border-radius: var(--radius-md);
                padding: 10px 16px;
                font-size: 0.9rem;
            }
            .post-cards-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .article-banner {
                padding: 40px 0 28px;
            }
            .article-banner h1 {
                font-size: 1.4rem;
            }
            .article-body {
                padding: 22px 16px;
                border-radius: var(--radius-md);
            }
            .article-content {
                font-size: 0.98rem;
            }
            .article-content h2 {
                font-size: 1.25rem;
            }
            .cta-inner {
                padding: 32px 22px;
                border-radius: var(--radius-lg);
            }
            .cta-inner h2 {
                font-size: 1.5rem;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-links {
                grid-template-columns: 1fr 1fr;
            }
            .article-sidebar {
                flex-direction: column;
            }
            .sidebar-card {
                padding: 18px 16px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 14px;
            }
            .header-logo {
                font-size: 1rem;
                gap: 6px;
            }
            .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 0.8rem;
            }
            .article-banner h1 {
                font-size: 1.2rem;
            }
            .article-body {
                padding: 16px 12px;
                border-radius: var(--radius-md);
            }
            .article-content {
                font-size: 0.92rem;
            }
            .cta-inner {
                padding: 24px 16px;
            }
            .cta-inner h2 {
                font-size: 1.3rem;
            }
            .cta-buttons {
                flex-direction: column;
                align-items: center;
            }
            .faq-question {
                font-size: 0.9rem;
                padding: 14px 16px;
            }
            .faq-answer {
                font-size: 0.85rem;
                padding: 0 16px;
            }
            .faq-item.open .faq-answer {
                padding: 0 16px 14px;
            }
            .breadcrumb {
                font-size: 0.78rem;
            }
            .post-card-body h3 {
                font-size: 0.95rem;
            }
            .section-title {
                font-size: 1.2rem;
            }
        }

/* roulang page: category1 */
:root {
            --bg-deep: #06060d;
            --bg-primary: #0d0d1a;
            --bg-secondary: #12121f;
            --bg-card: #151528;
            --bg-card-hover: #1a1a35;
            --bg-panel: #0f0f1d;
            --text-primary: #e8e8f0;
            --text-secondary: #b0b0c0;
            --text-muted: #6b6b80;
            --accent-cyan: #00c8e8;
            --accent-cyan-dim: #0098b0;
            --accent-magenta: #d946ef;
            --accent-magenta-dim: #a21caf;
            --accent-gold: #f59e0b;
            --accent-green: #10b981;
            --accent-red: #ef4444;
            --border-subtle: rgba(255, 255, 255, 0.06);
            --border-glow: rgba(0, 200, 232, 0.25);
            --border-glow-strong: rgba(0, 200, 232, 0.5);
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
            --shadow-glow: 0 0 30px rgba(0, 200, 232, 0.08);
            --shadow-glow-lg: 0 0 60px rgba(0, 200, 232, 0.12);
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-full: 9999px;
            --font-mono: 'SF Mono', 'Cascadia Code', 'Consolas', 'Monaco', monospace;
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --transition-fast: 0.15s ease;
            --transition-normal: 0.25s ease;
            --transition-slow: 0.35s ease;
            --max-width: 1240px;
            --header-height: 64px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            background: var(--bg-deep);
            color: var(--text-primary);
            line-height: 1.6;
            min-height: 100vh;
            overflow-x: hidden;
            background-image:
                radial-gradient(ellipse at 20% 15%, rgba(0, 200, 232, 0.03) 0%, transparent 60%),
                radial-gradient(ellipse at 75% 60%, rgba(217, 70, 239, 0.03) 0%, transparent 60%),
                radial-gradient(ellipse at 40% 80%, rgba(0, 200, 232, 0.02) 0%, transparent 50%);
            background-attachment: fixed;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--accent-cyan);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
            color: inherit;
        }
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        ul,
        ol {
            list-style: none;
        }

        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(13, 13, 26, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-subtle);
            height: var(--header-height);
            display: flex;
            align-items: center;
            transition: background var(--transition-normal), box-shadow var(--transition-normal);
        }
        .site-header.scrolled {
            background: rgba(13, 13, 26, 0.95);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
            border-bottom-color: var(--border-glow);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            height: 100%;
        }
        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.15rem;
            color: var(--text-primary);
            white-space: nowrap;
            letter-spacing: 0.5px;
            transition: color var(--transition-fast);
        }
        .header-logo:hover {
            color: var(--accent-cyan);
        }
        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-cyan-dim));
            border-radius: var(--radius-sm);
            color: #fff;
            font-size: 1rem;
            box-shadow: 0 0 18px rgba(0, 200, 232, 0.3);
        }
        .header-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .nav-chip {
            display: inline-flex;
            align-items: center;
            padding: 7px 16px;
            border-radius: var(--radius-full);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            border: 1px solid transparent;
            background: transparent;
            transition: all var(--transition-fast);
            white-space: nowrap;
            letter-spacing: 0.3px;
        }
        .nav-chip:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.04);
            border-color: rgba(255, 255, 255, 0.1);
        }
        .nav-chip.active {
            color: var(--accent-cyan);
            background: rgba(0, 200, 232, 0.08);
            border-color: var(--border-glow);
            font-weight: 600;
            box-shadow: 0 0 12px rgba(0, 200, 232, 0.1);
        }
        .header-cta-mobile {
            display: none;
        }
        .mobile-menu-toggle {
            display: none;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            font-size: 1.3rem;
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-subtle);
            transition: all var(--transition-fast);
        }
        .mobile-menu-toggle:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: var(--border-glow);
        }
        .mobile-menu-toggle[aria-expanded="true"] {
            background: rgba(0, 200, 232, 0.12);
            border-color: var(--border-glow-strong);
            color: var(--accent-cyan);
        }

        /* Buttons */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 0.9rem;
            letter-spacing: 0.4px;
            transition: all var(--transition-fast);
            white-space: nowrap;
            cursor: pointer;
            text-align: center;
        }
        .btn-accent {
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-cyan-dim));
            color: #fff;
            border: none;
            box-shadow: 0 4px 16px rgba(0, 200, 232, 0.25);
        }
        .btn-accent:hover {
            box-shadow: 0 6px 24px rgba(0, 200, 232, 0.4);
            transform: translateY(-1px);
            color: #fff;
        }
        .btn-outline {
            background: transparent;
            color: var(--accent-cyan);
            border: 1px solid var(--border-glow);
        }
        .btn-outline:hover {
            background: rgba(0, 200, 232, 0.08);
            border-color: var(--border-glow-strong);
            color: var(--accent-cyan);
        }
        .btn-lg {
            padding: 14px 32px;
            font-size: 1rem;
            border-radius: var(--radius-xl);
        }

        /* Page Banner */
        .page-banner {
            position: relative;
            padding: 80px 0 60px;
            background: var(--bg-primary);
            overflow: hidden;
            border-bottom: 1px solid var(--border-subtle);
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.12;
            z-index: 0;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(13, 13, 26, 0.4) 0%, rgba(13, 13, 26, 0.95) 100%);
            z-index: 0;
        }
        .page-banner .container {
            position: relative;
            z-index: 1;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }
        .breadcrumb a:hover {
            color: var(--accent-cyan);
        }
        .breadcrumb .sep {
            color: var(--text-muted);
            opacity: 0.5;
        }
        .breadcrumb .current {
            color: var(--accent-cyan);
            font-weight: 500;
        }
        .page-banner-title {
            font-size: 2.4rem;
            font-weight: 800;
            letter-spacing: 1px;
            color: var(--text-primary);
            margin-bottom: 12px;
            line-height: 1.2;
        }
        .page-banner-title span {
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-magenta));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .page-banner-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 600px;
            line-height: 1.7;
        }
        .page-banner-stats {
            display: flex;
            gap: 32px;
            margin-top: 28px;
            flex-wrap: wrap;
        }
        .page-stat {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .page-stat .stat-num {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--accent-cyan);
            font-family: var(--font-mono);
            letter-spacing: -1px;
        }
        .page-stat .stat-label {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* Filter Chips */
        .section-filter {
            padding: 36px 0 20px;
            background: var(--bg-deep);
        }
        .filter-chips {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }
        .filter-chip {
            padding: 8px 20px;
            border-radius: var(--radius-full);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
            letter-spacing: 0.3px;
        }
        .filter-chip:hover {
            color: var(--text-primary);
            background: var(--bg-card-hover);
            border-color: rgba(255, 255, 255, 0.15);
        }
        .filter-chip.active {
            color: #fff;
            background: rgba(0, 200, 232, 0.15);
            border-color: var(--border-glow-strong);
            font-weight: 600;
            box-shadow: 0 0 16px rgba(0, 200, 232, 0.1);
        }
        .filter-chip .chip-icon {
            margin-right: 6px;
            font-size: 0.8rem;
        }

        /* Articles Grid */
        .section-articles {
            padding: 40px 0 60px;
            background: var(--bg-deep);
        }
        .articles-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .article-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-subtle);
            overflow: hidden;
            transition: all var(--transition-normal);
            display: flex;
            flex-direction: column;
            position: relative;
        }
        .article-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
            transform: translateY(-3px);
        }
        .article-card-img-wrap {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--bg-panel);
        }
        .article-card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .article-card:hover .article-card-img-wrap img {
            transform: scale(1.05);
        }
        .article-card-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            padding: 4px 12px;
            border-radius: var(--radius-full);
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            z-index: 2;
        }
        .badge-hot {
            background: rgba(239, 68, 68, 0.85);
            color: #fff;
        }
        .badge-new {
            background: rgba(16, 185, 129, 0.85);
            color: #fff;
        }
        .badge-trend {
            background: rgba(245, 158, 11, 0.85);
            color: #fff;
        }
        .badge-pro {
            background: rgba(217, 70, 239, 0.85);
            color: #fff;
        }
        .article-card-body {
            padding: 18px 20px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .article-card-tag {
            display: inline-block;
            font-size: 0.75rem;
            color: var(--accent-cyan);
            font-weight: 500;
            letter-spacing: 0.4px;
            margin-bottom: 8px;
            text-transform: uppercase;
        }
        .article-card-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.4;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .article-card-excerpt {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.6;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .article-card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-top: 14px;
            padding-top: 12px;
            border-top: 1px solid var(--border-subtle);
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .article-card-meta .meta-left {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-card-meta .meta-difficulty {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .diff-dot {
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--text-muted);
        }
        .diff-dot.filled {
            background: var(--accent-gold);
        }

        /* Hot Ranking Panel */
        .section-ranking {
            padding: 50px 0 60px;
            background: var(--bg-primary);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }
        .section-heading {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 32px;
            flex-wrap: wrap;
            gap: 16px;
        }
        .section-heading h2 {
            font-size: 1.6rem;
            font-weight: 700;
            letter-spacing: 0.5px;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .section-heading h2 .heading-icon {
            color: var(--accent-gold);
            font-size: 1.3rem;
        }
        .section-heading .heading-link {
            font-size: 0.9rem;
            color: var(--accent-cyan);
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 4px;
            transition: color var(--transition-fast);
        }
        .section-heading .heading-link:hover {
            color: var(--accent-cyan-dim);
        }
        .ranking-panel {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }
        .ranking-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 16px 20px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-subtle);
            transition: all var(--transition-fast);
            cursor: pointer;
        }
        .ranking-item:hover {
            border-color: var(--border-glow);
            background: var(--bg-card-hover);
            box-shadow: var(--shadow-card);
        }
        .ranking-num {
            flex-shrink: 0;
            width: 38px;
            height: 38px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.1rem;
            border-radius: var(--radius-sm);
            font-family: var(--font-mono);
        }
        .ranking-num.top1 {
            background: linear-gradient(135deg, #f59e0b, #d97706);
            color: #fff;
            box-shadow: 0 0 14px rgba(245, 158, 11, 0.3);
        }
        .ranking-num.top2 {
            background: linear-gradient(135deg, #94a3b8, #64748b);
            color: #fff;
            box-shadow: 0 0 10px rgba(148, 163, 184, 0.2);
        }
        .ranking-num.top3 {
            background: linear-gradient(135deg, #d97706, #92400e);
            color: #fff;
            box-shadow: 0 0 10px rgba(217, 119, 6, 0.2);
        }
        .ranking-num.normal {
            background: var(--bg-panel);
            color: var(--text-muted);
            border: 1px solid var(--border-subtle);
        }
        .ranking-info {
            flex: 1;
            min-width: 0;
        }
        .ranking-info .rank-title {
            font-weight: 600;
            color: var(--text-primary);
            font-size: 0.95rem;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .ranking-info .rank-meta {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-top: 3px;
        }
        .ranking-score {
            flex-shrink: 0;
            text-align: right;
        }
        .ranking-score .score-val {
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--accent-cyan);
            font-family: var(--font-mono);
        }
        .ranking-score .score-label {
            font-size: 0.7rem;
            color: var(--text-muted);
        }

        /* Path / Steps */
        .section-path {
            padding: 60px 0;
            background: var(--bg-deep);
        }
        .path-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }
        .path-step {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-subtle);
            padding: 28px 22px;
            text-align: center;
            position: relative;
            transition: all var(--transition-normal);
        }
        .path-step:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
            transform: translateY(-2px);
        }
        .path-step-num {
            width: 44px;
            height: 44px;
            margin: 0 auto 14px;
            border-radius: 50%;
            background: rgba(0, 200, 232, 0.1);
            border: 2px solid var(--border-glow);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.2rem;
            color: var(--accent-cyan);
            font-family: var(--font-mono);
        }
        .path-step h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 6px;
        }
        .path-step p {
            font-size: 0.82rem;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* HUD Stats Panel */
        .section-stats-hud {
            padding: 50px 0 60px;
            background: var(--bg-primary);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }
        .hud-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .hud-card {
            background: var(--bg-panel);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-subtle);
            padding: 24px 20px;
            text-align: center;
            transition: all var(--transition-normal);
            position: relative;
            overflow: hidden;
        }
        .hud-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--accent-cyan), transparent);
            opacity: 0;
            transition: opacity var(--transition-normal);
        }
        .hud-card:hover::before {
            opacity: 1;
        }
        .hud-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
        }
        .hud-icon {
            font-size: 1.8rem;
            color: var(--accent-cyan);
            margin-bottom: 10px;
        }
        .hud-value {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-primary);
            font-family: var(--font-mono);
            letter-spacing: -1px;
            line-height: 1;
        }
        .hud-value .unit {
            font-size: 0.85rem;
            color: var(--text-muted);
            font-weight: 500;
            letter-spacing: 0;
        }
        .hud-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 6px;
        }
        .hud-sub {
            font-size: 0.75rem;
            color: var(--accent-green);
            margin-top: 4px;
            font-weight: 500;
        }

        /* Compare Panel */
        .section-compare {
            padding: 60px 0;
            background: var(--bg-deep);
        }
        .compare-panel {
            display: grid;
            grid-template-columns: 1fr auto 1fr;
            gap: 0;
            align-items: start;
            background: var(--bg-card);
            border-radius: var(--radius-xl);
            border: 1px solid var(--border-subtle);
            overflow: hidden;
        }
        .compare-col {
            padding: 32px 28px;
        }
        .compare-col h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 16px;
            letter-spacing: 0.4px;
        }
        .compare-col.left h4 {
            color: var(--accent-cyan);
        }
        .compare-col.right h4 {
            color: var(--accent-magenta);
        }
        .compare-list li {
            padding: 8px 0;
            font-size: 0.9rem;
            color: var(--text-secondary);
            display: flex;
            align-items: flex-start;
            gap: 8px;
            line-height: 1.5;
            border-bottom: 1px solid var(--border-subtle);
        }
        .compare-list li:last-child {
            border-bottom: none;
        }
        .compare-list li i {
            margin-top: 3px;
            font-size: 0.8rem;
            flex-shrink: 0;
        }
        .compare-list .fa-check {
            color: var(--accent-green);
        }
        .compare-list .fa-xmark {
            color: var(--accent-red);
        }
        .compare-divider {
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 32px 0;
            position: relative;
        }
        .compare-vs {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-magenta));
            color: #fff;
            font-weight: 800;
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            justify-content: center;
            letter-spacing: 1px;
            box-shadow: 0 0 24px rgba(0, 200, 232, 0.2);
        }

        /* FAQ */
        .section-faq {
            padding: 60px 0;
            background: var(--bg-primary);
            border-top: 1px solid var(--border-subtle);
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-subtle);
            margin-bottom: 12px;
            overflow: hidden;
            transition: all var(--transition-fast);
        }
        .faq-item:hover {
            border-color: var(--border-glow);
        }
        .faq-question {
            width: 100%;
            text-align: left;
            padding: 18px 22px;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            background: transparent;
            border: none;
            cursor: pointer;
            letter-spacing: 0.3px;
            transition: color var(--transition-fast);
        }
        .faq-question:hover {
            color: var(--accent-cyan);
        }
        .faq-question i {
            font-size: 0.8rem;
            color: var(--text-muted);
            transition: transform var(--transition-fast);
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--accent-cyan);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-normal), padding var(--transition-normal);
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
        }
        .faq-answer-inner {
            padding: 0 22px 18px;
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* CTA */
        .section-cta {
            padding: 70px 0;
            background: var(--bg-deep);
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .section-cta::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.08;
            z-index: 0;
        }
        .section-cta .container {
            position: relative;
            z-index: 1;
        }
        .cta-panel {
            background: var(--bg-card);
            border-radius: var(--radius-xl);
            border: 1px solid var(--border-subtle);
            padding: 48px 32px;
            max-width: 700px;
            margin: 0 auto;
            box-shadow: var(--shadow-glow-lg);
        }
        .cta-panel h2 {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }
        .cta-panel p {
            color: var(--text-secondary);
            margin-bottom: 28px;
            font-size: 1rem;
            line-height: 1.7;
        }
        .cta-buttons {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* Footer */
        .site-footer {
            background: var(--bg-primary);
            border-top: 1px solid var(--border-subtle);
            padding: 50px 0 24px;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 1.5fr 2fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        .footer-brand .footer-logo {
            font-weight: 700;
            font-size: 1.2rem;
            color: var(--text-primary);
            margin-bottom: 10px;
            letter-spacing: 0.5px;
        }
        .footer-brand p {
            color: var(--text-muted);
            font-size: 0.88rem;
            line-height: 1.6;
        }
        .footer-links {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .footer-links h5 {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 12px;
            letter-spacing: 0.4px;
        }
        .footer-links ul li {
            margin-bottom: 8px;
        }
        .footer-links ul li a {
            color: var(--text-muted);
            font-size: 0.85rem;
            transition: color var(--transition-fast);
        }
        .footer-links ul li a:hover {
            color: var(--accent-cyan);
        }
        .footer-bottom {
            border-top: 1px solid var(--border-subtle);
            padding-top: 20px;
            text-align: center;
            font-size: 0.82rem;
            color: var(--text-muted);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .articles-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .hud-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .path-steps {
                grid-template-columns: repeat(2, 1fr);
            }
            .ranking-panel {
                grid-template-columns: 1fr;
            }
            .compare-panel {
                grid-template-columns: 1fr;
            }
            .compare-divider {
                padding: 16px 0;
            }
            .compare-vs {
                width: 36px;
                height: 36px;
                font-size: 0.75rem;
            }
            .page-banner-title {
                font-size: 1.9rem;
            }
        }

        @media (max-width: 768px) {
            .header-nav {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(13, 13, 26, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 16px 20px;
                gap: 4px;
                border-bottom: 1px solid var(--border-subtle);
                z-index: 999;
            }
            .header-nav.open {
                display: flex;
            }
            .nav-chip {
                width: 100%;
                justify-content: center;
                padding: 10px 16px;
                border-radius: var(--radius-md);
            }
            .header-cta {
                display: none;
            }
            .header-cta-mobile {
                display: block;
                width: 100%;
                margin-top: 8px;
            }
            .header-cta-mobile .btn-primary {
                width: 100%;
            }
            .mobile-menu-toggle {
                display: flex;
            }
            .articles-grid {
                grid-template-columns: 1fr;
            }
            .hud-grid {
                grid-template-columns: 1fr 1fr;
            }
            .path-steps {
                grid-template-columns: 1fr;
            }
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-links {
                grid-template-columns: 1fr;
            }
            .page-banner {
                padding: 50px 0 36px;
            }
            .page-banner-title {
                font-size: 1.5rem;
            }
            .page-banner-stats {
                gap: 16px;
            }
            .page-stat .stat-num {
                font-size: 1.4rem;
            }
            .section-heading h2 {
                font-size: 1.3rem;
            }
            .cta-panel {
                padding: 32px 20px;
            }
            .cta-panel h2 {
                font-size: 1.4rem;
            }
            .compare-col {
                padding: 24px 18px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .hud-grid {
                grid-template-columns: 1fr;
            }
            .page-banner-title {
                font-size: 1.3rem;
            }
            .filter-chips {
                gap: 6px;
            }
            .filter-chip {
                padding: 6px 14px;
                font-size: 0.8rem;
            }
            .btn-lg {
                padding: 12px 24px;
                font-size: 0.9rem;
            }
            .ranking-item {
                padding: 12px 14px;
                gap: 10px;
            }
            .ranking-num {
                width: 30px;
                height: 30px;
                font-size: 0.9rem;
            }
            .path-step {
                padding: 20px 16px;
            }
            .section-cta {
                padding: 50px 0;
            }
        }

        @keyframes pulse-glow {
            0%, 100% {
                box-shadow: 0 0 20px rgba(0, 200, 232, 0.08);
            }
            50% {
                box-shadow: 0 0 36px rgba(0, 200, 232, 0.18);
            }
        }
        .animate-glow {
            animation: pulse-glow 3s ease-in-out infinite;
        }

        /* Scroll reveal hint */
        .hud-card,
        .article-card,
        .ranking-item,
        .path-step {
            opacity: 0;
            transform: translateY(20px);
            animation: fadeInUp 0.6s ease forwards;
        }
        @keyframes fadeInUp {
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .article-card:nth-child(1) { animation-delay: 0.05s; }
        .article-card:nth-child(2) { animation-delay: 0.1s; }
        .article-card:nth-child(3) { animation-delay: 0.15s; }
        .article-card:nth-child(4) { animation-delay: 0.2s; }
        .article-card:nth-child(5) { animation-delay: 0.25s; }
        .article-card:nth-child(6) { animation-delay: 0.3s; }
        .hud-card:nth-child(1) { animation-delay: 0.05s; }
        .hud-card:nth-child(2) { animation-delay: 0.12s; }
        .hud-card:nth-child(3) { animation-delay: 0.19s; }
        .hud-card:nth-child(4) { animation-delay: 0.26s; }
        .path-step:nth-child(1) { animation-delay: 0.05s; }
        .path-step:nth-child(2) { animation-delay: 0.12s; }
        .path-step:nth-child(3) { animation-delay: 0.19s; }
        .path-step:nth-child(4) { animation-delay: 0.26s; }