/* roulang page: index */
:root {
            --color-primary: #1e2d3d;
            --color-primary-light: #263b50;
            --color-primary-dark: #141f2b;
            --color-accent: #c8963e;
            --color-accent-light: #d4a853;
            --color-accent-glow: #e8c97a;
            --color-bg: #f7f6f3;
            --color-bg-alt: #eeebe4;
            --color-surface: #ffffff;
            --color-surface-hover: #fafaf8;
            --color-text: #2c2c2c;
            --color-text-soft: #5a5a5a;
            --color-text-muted: #8b8b8b;
            --color-border: #e0ddd6;
            --color-border-light: #ece9e3;
            --color-border-strong: #c9c5bb;
            --color-success: #3b8c5a;
            --color-warning: #d4a853;
            --color-danger: #c44d4d;
            --color-legendary: #c8963e;
            --color-epic: #8b5cf6;
            --color-rare: #4a90c4;
            --color-common: #94a3b8;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-full: 50%;
            --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-sm: 0 2px 6px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.10);
            --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.12);
            --shadow-glow-gold: 0 0 24px rgba(200, 150, 62, 0.25);
            --shadow-card-lift: 0 6px 22px rgba(0, 0, 0, 0.10);
            --font-heading: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --font-body: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --transition-fast: 0.18s ease;
            --transition-base: 0.28s ease;
            --transition-slow: 0.4s ease;
            --header-height: 64px;
            --container-max: 1200px;
            --container-narrow: 860px;
        }

        *,
        *::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-body);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            min-height: 100vh;
        }

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

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

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
        }

        input {
            font-family: inherit;
            font-size: inherit;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-family: var(--font-heading);
            font-weight: 700;
            line-height: 1.25;
            color: var(--color-primary);
        }

        .container {
            width: 100%;
            max-width: var(--container-max);
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        .container--narrow {
            max-width: var(--container-narrow);
        }

        /* ========== HEADER / NAV ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: var(--color-surface);
            border-bottom: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-xs);
            height: var(--header-height);
            display: flex;
            align-items: center;
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 20px;
        }

        .header-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 1.15rem;
            color: var(--color-primary);
            white-space: nowrap;
            letter-spacing: 0.02em;
            transition: color var(--transition-fast);
            flex-shrink: 0;
        }

        .header-logo:hover {
            color: var(--color-accent);
        }

        .header-logo .logo-icon {
            width: 34px;
            height: 34px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--color-accent), var(--color-accent-light));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1rem;
            flex-shrink: 0;
        }

        .header-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-shrink: 0;
        }

        .header-nav a {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-size: 0.94rem;
            font-weight: 500;
            color: var(--color-text-soft);
            transition: all var(--transition-fast);
            white-space: nowrap;
            letter-spacing: 0.01em;
        }

        .header-nav a:hover {
            color: var(--color-primary);
            background: var(--color-bg);
        }

        .header-nav a.active {
            color: var(--color-accent);
            font-weight: 600;
            background: rgba(200, 150, 62, 0.06);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .header-search {
            position: relative;
            display: flex;
            align-items: center;
        }

        .header-search input {
            width: 200px;
            padding: 9px 14px 9px 36px;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-full);
            font-size: 0.88rem;
            background: var(--color-bg);
            color: var(--color-text);
            transition: all var(--transition-fast);
            outline: none;
        }

        .header-search input:focus {
            border-color: var(--color-accent);
            box-shadow: 0 0 0 3px rgba(200, 150, 62, 0.08);
            background: var(--color-surface);
            width: 240px;
        }

        .header-search .search-icon {
            position: absolute;
            left: 12px;
            color: var(--color-text-muted);
            font-size: 0.85rem;
            pointer-events: none;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 7px;
            padding: 10px 20px;
            border-radius: var(--radius-sm);
            font-size: 0.92rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            transition: all var(--transition-base);
            white-space: nowrap;
            cursor: pointer;
            border: 2px solid transparent;
            text-align: center;
        }

        .btn--ghost {
            background: transparent;
            color: var(--color-text);
            border-color: var(--color-border);
        }

        .btn--ghost:hover {
            border-color: var(--color-border-strong);
            background: var(--color-bg);
            color: var(--color-primary);
        }

        .btn--accent {
            background: var(--color-accent);
            color: #fff;
            border-color: var(--color-accent);
        }

        .btn--accent:hover {
            background: var(--color-accent-light);
            border-color: var(--color-accent-light);
            box-shadow: var(--shadow-glow-gold);
            transform: translateY(-1px);
        }

        .btn--primary {
            background: var(--color-primary);
            color: #fff;
            border-color: var(--color-primary);
        }

        .btn--primary:hover {
            background: var(--color-primary-light);
            border-color: var(--color-primary-light);
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }

        .btn--lg {
            padding: 13px 28px;
            font-size: 1rem;
            border-radius: var(--radius-md);
        }

        .btn--xl {
            padding: 16px 34px;
            font-size: 1.08rem;
            border-radius: var(--radius-md);
        }

        .mobile-menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 8px;
            z-index: 1001;
        }

        .mobile-menu-toggle span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--color-primary);
            border-radius: 2px;
            transition: all var(--transition-fast);
        }

        .mobile-menu-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .mobile-menu-toggle.active span:nth-child(2) {
            opacity: 0;
        }

        .mobile-menu-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        .mobile-nav-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 998;
        }

        .mobile-nav-overlay.active {
            display: block;
        }

        .mobile-nav-panel {
            display: none;
            position: fixed;
            top: 0;
            right: -320px;
            width: 300px;
            height: 100vh;
            background: var(--color-surface);
            z-index: 999;
            padding: 80px 24px 30px;
            flex-direction: column;
            gap: 8px;
            transition: right var(--transition-base);
            box-shadow: var(--shadow-xl);
            overflow-y: auto;
        }

        .mobile-nav-panel.active {
            right: 0;
        }

        .mobile-nav-panel a {
            display: block;
            padding: 12px 16px;
            font-size: 1.05rem;
            font-weight: 500;
            border-radius: var(--radius-sm);
            color: var(--color-text);
            transition: all var(--transition-fast);
        }

        .mobile-nav-panel a:hover,
        .mobile-nav-panel a.active {
            background: var(--color-bg);
            color: var(--color-accent);
        }

        .mobile-nav-panel .mobile-search {
            margin-bottom: 12px;
        }

        .mobile-nav-panel .mobile-search input {
            width: 100%;
            padding: 11px 16px;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            background: var(--color-bg);
            outline: none;
        }

        .mobile-nav-panel .mobile-actions {
            display: flex;
            flex-direction: column;
            gap: 10px;
            margin-top: 16px;
        }

        /* ========== HERO ========== */
        .hero {
            position: relative;
            padding: 90px 0 100px;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(160deg, rgba(30, 45, 61, 0.88) 0%, rgba(20, 31, 43, 0.82) 40%, rgba(30, 45, 61, 0.78) 100%);
            z-index: 1;
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 80px;
            background: linear-gradient(to top, rgba(30, 45, 61, 0.55), transparent);
            z-index: 1;
        }

        .hero .container {
            position: relative;
            z-index: 2;
            display: flex;
            align-items: center;
            gap: 50px;
            flex-wrap: wrap;
        }

        .hero-content {
            flex: 1 1 480px;
            max-width: 600px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(200, 150, 62, 0.15);
            border: 1px solid rgba(200, 150, 62, 0.35);
            color: var(--color-accent-glow);
            padding: 7px 16px;
            border-radius: var(--radius-full);
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            margin-bottom: 20px;
        }

        .hero-badge .badge-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--color-accent);
            animation: pulse-dot 2s infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(200, 150, 62, 0.6);
            }
            50% {
                box-shadow: 0 0 0 10px rgba(200, 150, 62, 0);
            }
        }

        .hero h1 {
            font-size: clamp(2rem, 4.5vw, 3.2rem);
            font-weight: 800;
            color: #ffffff;
            margin-bottom: 16px;
            letter-spacing: 0.03em;
            line-height: 1.2;
        }

        .hero h1 .highlight {
            color: var(--color-accent-glow);
            position: relative;
        }

        .hero-description {
            font-size: 1.12rem;
            color: rgba(255, 255, 255, 0.82);
            margin-bottom: 30px;
            max-width: 500px;
            line-height: 1.75;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }

        .hero-visual {
            flex: 0 0 380px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .hero-card-stack {
            position: relative;
            width: 320px;
            height: 340px;
        }

        .hero-card-stack .stack-card {
            position: absolute;
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            padding: 24px;
            box-shadow: var(--shadow-lg);
            border: 2px solid var(--color-border-light);
            transition: all var(--transition-slow);
        }

        .hero-card-stack .stack-card:nth-child(1) {
            top: 0;
            left: 0;
            width: 240px;
            height: 280px;
            z-index: 3;
            border-color: var(--color-accent);
            box-shadow: var(--shadow-glow-gold), var(--shadow-lg);
        }

        .hero-card-stack .stack-card:nth-child(2) {
            top: 30px;
            left: 50px;
            width: 220px;
            height: 260px;
            z-index: 2;
            opacity: 0.85;
        }

        .hero-card-stack .stack-card:nth-child(3) {
            top: 60px;
            left: 100px;
            width: 200px;
            height: 240px;
            z-index: 1;
            opacity: 0.6;
        }

        .stack-card .card-rank {
            font-size: 0.75rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--color-accent);
            margin-bottom: 8px;
        }

        .stack-card .card-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 6px;
        }

        .stack-card .card-stat {
            display: flex;
            gap: 20px;
            margin-top: 12px;
        }

        .stack-card .stat-item {
            text-align: center;
        }

        .stack-card .stat-value {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--color-accent);
        }

        .stack-card .stat-label {
            font-size: 0.75rem;
            color: var(--color-text-muted);
        }

        /* ========== SECTIONS ========== */
        .section {
            padding: 70px 0;
        }

        .section--alt {
            background: var(--color-bg-alt);
        }

        .section--dark {
            background: var(--color-primary);
            color: #fff;
        }

        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-header h2 {
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            font-weight: 800;
            color: var(--color-primary);
            margin-bottom: 10px;
            letter-spacing: 0.02em;
        }

        .section--dark .section-header h2 {
            color: #fff;
        }

        .section-header .section-subtitle {
            font-size: 1rem;
            color: var(--color-text-soft);
            max-width: 520px;
            margin: 0 auto;
        }

        .section--dark .section-header .section-subtitle {
            color: rgba(255, 255, 255, 0.7);
        }

        .section-tag {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: var(--color-accent);
            margin-bottom: 8px;
        }

        /* ========== FEATURES GRID ========== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .feature-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            padding: 30px 24px;
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }

        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-lift);
            border-color: var(--color-border-strong);
        }

        .feature-card .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            margin-bottom: 16px;
            background: rgba(200, 150, 62, 0.1);
            color: var(--color-accent);
        }

        .feature-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--color-primary);
        }

        .feature-card p {
            font-size: 0.9rem;
            color: var(--color-text-soft);
            line-height: 1.6;
        }

        .feature-card .card-accent-line {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--color-accent);
            border-radius: 3px 3px 0 0;
            opacity: 0;
            transition: opacity var(--transition-base);
        }

        .feature-card:hover .card-accent-line {
            opacity: 1;
        }

        /* ========== CATEGORY CARD ========== */
        .category-entry-card {
            display: flex;
            flex-wrap: wrap;
            background: var(--color-surface);
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            border: 2px solid var(--color-border-light);
            transition: all var(--transition-base);
        }

        .category-entry-card:hover {
            box-shadow: var(--shadow-lg);
            border-color: var(--color-accent);
            transform: translateY(-3px);
        }

        .category-entry-card .cat-image {
            flex: 1 1 340px;
            min-height: 260px;
            position: relative;
            overflow: hidden;
        }

        .category-entry-card .cat-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .category-entry-card:hover .cat-image img {
            transform: scale(1.04);
        }

        .category-entry-card .cat-body {
            flex: 1 1 340px;
            padding: 36px 32px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .category-entry-card .cat-tag {
            display: inline-block;
            font-size: 0.78rem;
            font-weight: 700;
            letter-spacing: 0.05em;
            color: var(--color-accent);
            margin-bottom: 10px;
        }

        .category-entry-card h3 {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--color-primary);
            margin-bottom: 10px;
        }

        .category-entry-card p {
            font-size: 0.95rem;
            color: var(--color-text-soft);
            line-height: 1.7;
            margin-bottom: 20px;
        }

        /* ========== CMS LIST ========== */
        .cms-list-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .cms-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
        }

        .cms-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-lift);
            border-color: var(--color-border-strong);
        }

        .cms-card .cms-card-image {
            aspect-ratio: 16 / 10;
            overflow: hidden;
            position: relative;
        }

        .cms-card .cms-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .cms-card:hover .cms-card-image img {
            transform: scale(1.05);
        }

        .cms-card .cms-card-image .cms-category-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--color-accent);
            color: #fff;
            padding: 4px 12px;
            border-radius: var(--radius-full);
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.03em;
            z-index: 1;
        }

        .cms-card .cms-card-body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .cms-card .cms-card-title {
            font-size: 1.02rem;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 8px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .cms-card .cms-card-title a {
            color: inherit;
            transition: color var(--transition-fast);
        }

        .cms-card .cms-card-title a:hover {
            color: var(--color-accent);
        }

        .cms-card .cms-card-excerpt {
            font-size: 0.88rem;
            color: var(--color-text-soft);
            line-height: 1.6;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }

        .cms-card .cms-card-meta {
            font-size: 0.78rem;
            color: var(--color-text-muted);
            display: flex;
            gap: 14px;
            align-items: center;
        }

        .cms-empty {
            text-align: center;
            padding: 50px 20px;
            color: var(--color-text-muted);
            font-size: 0.95rem;
            grid-column: 1 / -1;
        }

        /* ========== STATS ROW ========== */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }

        .stat-block {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            padding: 32px 20px;
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
        }

        .stat-block:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .stat-block .stat-number {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--color-accent);
            letter-spacing: 0.02em;
            line-height: 1;
            margin-bottom: 8px;
        }

        .stat-block .stat-label {
            font-size: 0.9rem;
            color: var(--color-text-soft);
            font-weight: 500;
        }

        /* ========== STEPS / PROCESS ========== */
        .steps-list {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            counter-reset: step-counter;
        }

        .step-item {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            padding: 28px 22px;
            border: 1px solid var(--color-border-light);
            position: relative;
            transition: all var(--transition-base);
            counter-increment: step-counter;
        }

        .step-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }

        .step-item::before {
            content: counter(step-counter);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-full);
            background: var(--color-accent);
            color: #fff;
            font-weight: 800;
            font-size: 1.1rem;
            margin-bottom: 14px;
        }

        .step-item h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 6px;
        }

        .step-item p {
            font-size: 0.85rem;
            color: var(--color-text-soft);
            line-height: 1.6;
        }

        /* ========== STRATEGY TABLE ========== */
        .strategy-table-wrap {
            overflow-x: auto;
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-sm);
        }

        .strategy-table {
            width: 100%;
            border-collapse: collapse;
            background: var(--color-surface);
            min-width: 700px;
        }

        .strategy-table thead th {
            background: var(--color-primary);
            color: #fff;
            padding: 14px 18px;
            font-size: 0.88rem;
            font-weight: 700;
            text-align: left;
            letter-spacing: 0.03em;
            white-space: nowrap;
        }

        .strategy-table tbody td {
            padding: 13px 18px;
            font-size: 0.9rem;
            border-bottom: 1px solid var(--color-border-light);
            color: var(--color-text);
        }

        .strategy-table tbody tr {
            transition: background var(--transition-fast);
        }

        .strategy-table tbody tr:hover {
            background: var(--color-surface-hover);
        }

        .strategy-table tbody tr:last-child td {
            border-bottom: none;
        }

        .rarity-badge {
            display: inline-block;
            padding: 3px 10px;
            border-radius: var(--radius-full);
            font-size: 0.75rem;
            font-weight: 700;
            letter-spacing: 0.04em;
            border: 2px solid;
        }

        .rarity-badge--legendary {
            color: var(--color-legendary);
            border-color: var(--color-legendary);
            background: rgba(200, 150, 62, 0.08);
        }

        .rarity-badge--epic {
            color: var(--color-epic);
            border-color: var(--color-epic);
            background: rgba(139, 92, 246, 0.06);
        }

        .rarity-badge--rare {
            color: var(--color-rare);
            border-color: var(--color-rare);
            background: rgba(74, 144, 196, 0.06);
        }

        .rarity-badge--common {
            color: var(--color-common);
            border-color: var(--color-common);
            background: rgba(148, 163, 184, 0.06);
        }

        /* ========== MATRIX GRID ========== */
        .matrix-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .matrix-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            padding: 26px 22px;
            border: 2px solid var(--color-border-light);
            transition: all var(--transition-base);
            position: relative;
            text-align: center;
        }

        .matrix-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-5px);
        }

        .matrix-card.matrix-card--gold {
            border-color: var(--color-accent);
            box-shadow: var(--shadow-glow-gold);
        }

        .matrix-card .matrix-icon {
            font-size: 2rem;
            margin-bottom: 12px;
            color: var(--color-accent);
        }

        .matrix-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 6px;
        }

        .matrix-card p {
            font-size: 0.85rem;
            color: var(--color-text-soft);
            line-height: 1.5;
        }

        .matrix-card .matrix-corner {
            position: absolute;
            top: -1px;
            right: -1px;
            width: 40px;
            height: 40px;
            background: var(--color-accent);
            color: #fff;
            border-radius: 0 var(--radius-lg) 0 var(--radius-lg);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.7rem;
            font-weight: 800;
            letter-spacing: 0.05em;
            opacity: 0;
            transition: opacity var(--transition-base);
        }

        .matrix-card:hover .matrix-corner {
            opacity: 1;
        }

        /* ========== FAQ ========== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 760px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--color-surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border-light);
            overflow: hidden;
            transition: all var(--transition-fast);
        }

        .faq-item:hover {
            border-color: var(--color-border-strong);
        }

        .faq-question {
            padding: 18px 22px;
            font-weight: 700;
            font-size: 0.98rem;
            color: var(--color-primary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            background: var(--color-surface);
            transition: background var(--transition-fast);
            border: none;
            width: 100%;
            text-align: left;
            font-family: inherit;
        }

        .faq-question:hover {
            background: var(--color-surface-hover);
        }

        .faq-question .faq-icon {
            transition: transform var(--transition-fast);
            font-size: 0.85rem;
            color: var(--color-text-muted);
            flex-shrink: 0;
        }

        .faq-item.open .faq-question .faq-icon {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-base), padding var(--transition-base);
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
        }

        .faq-answer-inner {
            padding: 0 22px 18px;
            font-size: 0.9rem;
            color: var(--color-text-soft);
            line-height: 1.7;
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            text-align: center;
            padding: 70px 0;
            background: linear-gradient(160deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 220px;
            height: 220px;
            border-radius: 50%;
            background: rgba(200, 150, 62, 0.08);
            pointer-events: none;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -40px;
            width: 160px;
            height: 160px;
            border-radius: 50%;
            background: rgba(200, 150, 62, 0.06);
            pointer-events: none;
        }

        .cta-section .container {
            position: relative;
            z-index: 1;
        }

        .cta-section h2 {
            font-size: clamp(1.5rem, 3vw, 2rem);
            color: #fff;
            margin-bottom: 12px;
            font-weight: 800;
        }

        .cta-section p {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 28px;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--color-primary-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 40px 0 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 28px;
        }

        .footer-brand .footer-logo {
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 1.15rem;
            color: #fff;
            margin-bottom: 10px;
            letter-spacing: 0.02em;
        }

        .footer-brand p {
            font-size: 0.85rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.55);
            max-width: 300px;
        }

        .footer-links h5 {
            color: #fff;
            font-size: 0.9rem;
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: 0.03em;
        }

        .footer-links ul {
            display: flex;
            flex-direction: column;
            gap: 7px;
        }

        .footer-links ul li a {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.55);
            transition: color var(--transition-fast);
        }

        .footer-links ul li a:hover {
            color: var(--color-accent-glow);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 18px;
            text-align: center;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.4);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .cms-list-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-list {
                grid-template-columns: repeat(2, 1fr);
            }
            .matrix-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .hero .container {
                flex-direction: column;
                text-align: center;
            }
            .hero-content {
                max-width: 100%;
            }
            .hero-description {
                max-width: 100%;
                margin-left: auto;
                margin-right: auto;
            }
            .hero-actions {
                justify-content: center;
            }
            .hero-visual {
                flex: 0 0 auto;
            }
            .hero-card-stack {
                width: 280px;
                height: 300px;
            }
            .hero-card-stack .stack-card:nth-child(1) {
                width: 200px;
                height: 240px;
            }
            .hero-card-stack .stack-card:nth-child(2) {
                width: 180px;
                height: 220px;
                left: 40px;
            }
            .hero-card-stack .stack-card:nth-child(3) {
                width: 160px;
                height: 200px;
                left: 80px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
            .header-search input {
                width: 150px;
            }
            .header-search input:focus {
                width: 180px;
            }
            .header-nav a {
                padding: 8px 12px;
                font-size: 0.88rem;
            }
        }

        @media (max-width: 768px) {
            .header-nav {
                display: none;
            }
            .header-search {
                display: none;
            }
            .header-actions .btn--ghost {
                display: none;
            }
            .mobile-menu-toggle {
                display: flex;
            }
            .mobile-nav-panel {
                display: flex;
            }
            .features-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .cms-list-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .stats-row {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .steps-list {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .matrix-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .category-entry-card {
                flex-direction: column;
            }
            .category-entry-card .cat-image {
                min-height: 200px;
            }
            .category-entry-card .cat-body {
                padding: 24px 20px;
            }
            .hero {
                padding: 50px 0 60px;
            }
            .hero-card-stack {
                width: 240px;
                height: 260px;
            }
            .hero-card-stack .stack-card:nth-child(1) {
                width: 170px;
                height: 210px;
            }
            .hero-card-stack .stack-card:nth-child(2) {
                width: 150px;
                height: 190px;
                left: 30px;
            }
            .hero-card-stack .stack-card:nth-child(3) {
                width: 130px;
                height: 170px;
                left: 60px;
            }
            .section {
                padding: 48px 0;
            }
            .section-header {
                margin-bottom: 32px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .strategy-table-wrap {
                border-radius: var(--radius-md);
            }
        }

        @media (max-width: 520px) {
            .hero {
                padding: 36px 0 44px;
            }
            .hero h1 {
                font-size: 1.6rem;
            }
            .hero-description {
                font-size: 0.95rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .hero-actions .btn {
                width: 100%;
                max-width: 280px;
            }
            .hero-card-stack {
                display: none;
            }
            .hero-visual {
                display: none;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .stats-row {
                grid-template-columns: 1fr;
            }
            .btn--xl {
                padding: 14px 24px;
                font-size: 0.95rem;
            }
            .btn--lg {
                padding: 11px 22px;
                font-size: 0.9rem;
            }
            .container {
                padding-left: 14px;
                padding-right: 14px;
            }
            .feature-card {
                padding: 22px 18px;
            }
            .site-header {
                height: 56px;
            }
            :root {
                --header-height: 56px;
            }
            .header-logo {
                font-size: 1rem;
            }
            .header-logo .logo-icon {
                width: 28px;
                height: 28px;
                font-size: 0.8rem;
            }
        }

/* roulang page: article */
:root {
            --color-primary: #1a2d3d;
            --color-primary-light: #243b50;
            --color-accent: #c9a050;
            --color-accent-light: #d9b970;
            --color-accent-dark: #a88030;
            --color-bg: #f7f5f0;
            --color-bg-alt: #ede9e1;
            --color-surface: #ffffff;
            --color-surface-hover: #fafaf8;
            --color-text: #1e1e1e;
            --color-text-secondary: #4a4a4a;
            --color-text-weak: #7a7a7a;
            --color-text-inverse: #ffffff;
            --color-border: #e2ded6;
            --color-border-light: #eeebe5;
            --color-success: #3a7d44;
            --color-warning: #d4a030;
            --color-danger: #c0392b;
            --radius-sm: 6px;
            --radius: 10px;
            --radius-lg: 14px;
            --radius-xl: 20px;
            --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
            --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.15);
            --shadow-accent: 0 4px 20px rgba(201, 160, 80, 0.25);
            --font-sans: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            --font-heading: 'Noto Sans SC', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
            --transition-fast: 0.15s ease;
            --transition-base: 0.25s ease;
            --transition-slow: 0.4s ease;
            --max-width: 1200px;
            --max-width-narrow: 860px;
            --header-height: 68px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            -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;
            display: flex;
            flex-direction: column;
        }

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

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

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
        }

        input {
            font-family: inherit;
            font-size: inherit;
        }

        ul, ol {
            list-style: none;
        }

        h1, h2, h3, h4, h5, h6 {
            font-family: var(--font-heading);
            font-weight: 700;
            line-height: 1.3;
            color: var(--color-primary);
        }

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

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

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: var(--color-surface);
            border-bottom: 1px solid var(--color-border);
            box-shadow: var(--shadow-xs);
            height: var(--header-height);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            gap: 20px;
        }

        .header-logo-group {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .header-logo-icon {
            width: 38px;
            height: 38px;
            background: var(--color-primary);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-accent);
            font-size: 20px;
            font-weight: 800;
            letter-spacing: -1px;
        }

        .header-logo-text {
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 17px;
            color: var(--color-primary);
            white-space: nowrap;
            letter-spacing: -0.3px;
        }

        .header-logo-text span {
            color: var(--color-accent);
        }

        .header-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-shrink: 0;
        }

        .header-nav a {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-size: 14.5px;
            font-weight: 500;
            color: var(--color-text-secondary);
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }

        .header-nav a:hover {
            color: var(--color-primary);
            background: var(--color-bg-alt);
        }

        .header-nav a.active {
            color: var(--color-accent-dark);
            background: rgba(201, 160, 80, 0.08);
            font-weight: 600;
        }

        .header-nav a.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--color-accent);
            border-radius: 3px 3px 0 0;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .header-search {
            display: flex;
            align-items: center;
            background: var(--color-bg);
            border: 1.5px solid var(--color-border-light);
            border-radius: 24px;
            padding: 7px 14px;
            gap: 8px;
            transition: all var(--transition-fast);
            width: 200px;
        }

        .header-search:focus-within {
            border-color: var(--color-accent);
            background: var(--color-surface);
            box-shadow: 0 0 0 3px rgba(201, 160, 80, 0.08);
            width: 240px;
        }

        .header-search i {
            color: var(--color-text-weak);
            font-size: 13px;
        }

        .header-search input {
            border: none;
            background: transparent;
            outline: none;
            width: 100%;
            font-size: 13.5px;
            color: var(--color-text);
            padding: 0;
        }

        .header-search input::placeholder {
            color: var(--color-text-weak);
        }

        .btn-header-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 9px 18px;
            background: var(--color-accent);
            color: #fff;
            font-weight: 600;
            font-size: 13.5px;
            border-radius: 24px;
            transition: all var(--transition-fast);
            white-space: nowrap;
            box-shadow: var(--shadow-accent);
        }

        .btn-header-cta:hover {
            background: var(--color-accent-dark);
            box-shadow: 0 6px 24px rgba(201, 160, 80, 0.35);
            transform: translateY(-1px);
        }

        .mobile-menu-toggle {
            display: none;
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            align-items: center;
            justify-content: center;
            color: var(--color-primary);
            font-size: 22px;
            transition: background var(--transition-fast);
        }

        .mobile-menu-toggle:hover {
            background: var(--color-bg-alt);
        }

        /* Mobile Nav */
        .mobile-nav-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.5);
            z-index: 999;
            opacity: 0;
            transition: opacity var(--transition-base);
        }

        .mobile-nav-overlay.active {
            opacity: 1;
        }

        .mobile-nav-panel {
            display: none;
            position: fixed;
            top: 0;
            right: -300px;
            width: 280px;
            height: 100%;
            background: var(--color-surface);
            z-index: 1001;
            padding: 24px;
            transition: right var(--transition-base);
            box-shadow: var(--shadow-xl);
            overflow-y: auto;
        }

        .mobile-nav-panel.active {
            right: 0;
        }

        .mobile-nav-panel .mobile-nav-close {
            display: flex;
            align-items: center;
            justify-content: flex-end;
            margin-bottom: 20px;
            font-size: 24px;
            color: var(--color-text-weak);
            cursor: pointer;
        }

        .mobile-nav-panel a {
            display: block;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text-secondary);
            margin-bottom: 4px;
            transition: all var(--transition-fast);
        }

        .mobile-nav-panel a:hover,
        .mobile-nav-panel a.active {
            color: var(--color-accent-dark);
            background: rgba(201, 160, 80, 0.08);
        }

        /* Inner Banner */
        .inner-banner {
            position: relative;
            background: var(--color-primary) url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            min-height: 220px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }

        .inner-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26, 45, 61, 0.88) 0%, rgba(26, 45, 61, 0.7) 100%);
            z-index: 1;
        }

        .inner-banner .container {
            position: relative;
            z-index: 2;
            padding-top: 28px;
            padding-bottom: 28px;
        }

        .inner-banner-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            color: var(--color-accent);
            margin-bottom: 8px;
        }

        .inner-banner h1 {
            font-size: 28px;
            font-weight: 800;
            color: #fff;
            margin: 0;
            line-height: 1.35;
            max-width: 700px;
        }

        /* Breadcrumb */
        .breadcrumb-bar {
            background: var(--color-surface);
            border-bottom: 1px solid var(--color-border-light);
            padding: 12px 0;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13.5px;
            color: var(--color-text-weak);
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--color-text-secondary);
            transition: color var(--transition-fast);
        }

        .breadcrumb a:hover {
            color: var(--color-accent-dark);
        }

        .breadcrumb .separator {
            color: var(--color-border);
            font-size: 10px;
        }

        .breadcrumb .current {
            color: var(--color-text);
            font-weight: 500;
        }

        /* Article Main */
        .article-section {
            padding: 40px 0 60px;
        }

        .article-layout {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 36px;
            align-items: start;
        }

        .article-main-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            overflow: hidden;
            border: 1px solid var(--color-border-light);
        }

        .article-cover-wrap {
            position: relative;
            width: 100%;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--color-bg-alt);
        }

        .article-cover-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .article-cover-wrap:hover img {
            transform: scale(1.03);
        }

        .article-cover-badge {
            position: absolute;
            top: 16px;
            left: 16px;
            background: var(--color-accent);
            color: #fff;
            padding: 5px 14px;
            border-radius: 20px;
            font-size: 12.5px;
            font-weight: 600;
            letter-spacing: 0.5px;
        }

        .article-body {
            padding: 32px 36px 40px;
        }

        .article-meta-row {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 14px;
            font-size: 13.5px;
            color: var(--color-text-weak);
        }

        .article-meta-row .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        .article-meta-row .meta-item i {
            font-size: 13px;
            color: var(--color-accent);
        }

        .article-meta-row .meta-category {
            background: rgba(201, 160, 80, 0.1);
            color: var(--color-accent-dark);
            padding: 3px 12px;
            border-radius: 14px;
            font-weight: 600;
            font-size: 12.5px;
        }

        .article-body h2.article-title-main {
            font-size: 26px;
            font-weight: 800;
            color: var(--color-primary);
            margin-bottom: 16px;
            line-height: 1.4;
        }

        .article-excerpt-box {
            background: var(--color-bg);
            border-left: 4px solid var(--color-accent);
            padding: 16px 20px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin-bottom: 28px;
            font-size: 15px;
            color: var(--color-text-secondary);
            line-height: 1.7;
            font-style: italic;
        }

        .article-content {
            font-size: 16px;
            line-height: 1.85;
            color: var(--color-text);
        }

        .article-content h2 {
            font-size: 22px;
            margin-top: 36px;
            margin-bottom: 14px;
            color: var(--color-primary);
            padding-bottom: 8px;
            border-bottom: 2px solid var(--color-border-light);
        }

        .article-content h3 {
            font-size: 19px;
            margin-top: 28px;
            margin-bottom: 10px;
            color: var(--color-primary-light);
        }

        .article-content p {
            margin-bottom: 16px;
        }

        .article-content ul,
        .article-content ol {
            margin-bottom: 16px;
            padding-left: 24px;
            list-style: disc;
        }

        .article-content ol {
            list-style: decimal;
        }

        .article-content li {
            margin-bottom: 6px;
        }

        .article-content img {
            border-radius: var(--radius);
            margin: 20px 0;
            box-shadow: var(--shadow-sm);
        }

        .article-content blockquote {
            border-left: 4px solid var(--color-accent);
            background: var(--color-bg);
            padding: 16px 24px;
            border-radius: 0 var(--radius) var(--radius) 0;
            margin: 24px 0;
            color: var(--color-text-secondary);
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0;
            font-size: 14px;
        }

        .article-content table th,
        .article-content table td {
            border: 1px solid var(--color-border);
            padding: 10px 14px;
            text-align: left;
        }

        .article-content table th {
            background: var(--color-primary);
            color: #fff;
            font-weight: 600;
        }

        .article-content table tr:nth-child(even) td {
            background: var(--color-bg);
        }

        .article-content strong {
            color: var(--color-primary);
            font-weight: 700;
        }

        .article-content .highlight-box {
            background: linear-gradient(135deg, rgba(201, 160, 80, 0.08), rgba(201, 160, 80, 0.02));
            border: 1px solid rgba(201, 160, 80, 0.2);
            border-radius: var(--radius);
            padding: 20px 24px;
            margin: 20px 0;
        }

        /* Sidebar */
        .article-sidebar {
            position: sticky;
            top: calc(var(--header-height) + 24px);
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .sidebar-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            padding: 20px;
        }

        .sidebar-card h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 14px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--color-border-light);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .sidebar-card h4 i {
            color: var(--color-accent);
            font-size: 14px;
        }

        .sidebar-post-mini {
            display: flex;
            gap: 12px;
            padding: 10px 0;
            border-bottom: 1px solid var(--color-border-light);
            transition: all var(--transition-fast);
        }

        .sidebar-post-mini:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }

        .sidebar-post-mini:hover {
            background: var(--color-bg);
            margin: 0 -8px;
            padding-left: 8px;
            padding-right: 8px;
            border-radius: var(--radius-sm);
        }

        .sidebar-post-mini .mini-thumb {
            width: 64px;
            height: 48px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            flex-shrink: 0;
            background: var(--color-bg-alt);
        }

        .sidebar-post-mini .mini-info {
            flex: 1;
            min-width: 0;
        }

        .sidebar-post-mini .mini-title {
            font-size: 13px;
            font-weight: 600;
            color: var(--color-text);
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: color var(--transition-fast);
        }

        .sidebar-post-mini:hover .mini-title {
            color: var(--color-accent-dark);
        }

        .sidebar-post-mini .mini-date {
            font-size: 11.5px;
            color: var(--color-text-weak);
            margin-top: 4px;
        }

        .sidebar-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }

        .sidebar-tag {
            display: inline-block;
            padding: 5px 12px;
            background: var(--color-bg);
            border-radius: 16px;
            font-size: 12px;
            color: var(--color-text-secondary);
            transition: all var(--transition-fast);
            border: 1px solid transparent;
        }

        .sidebar-tag:hover {
            border-color: var(--color-accent);
            color: var(--color-accent-dark);
            background: rgba(201, 160, 80, 0.06);
        }

        /* Related Posts Section */
        .related-section {
            padding: 50px 0 60px;
            background: var(--color-bg-alt);
        }

        .section-header {
            text-align: center;
            margin-bottom: 36px;
        }

        .section-header .section-label {
            display: inline-block;
            font-size: 12.5px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            color: var(--color-accent);
            margin-bottom: 6px;
        }

        .section-header h2 {
            font-size: 28px;
            font-weight: 800;
            color: var(--color-primary);
            margin: 0;
        }

        .section-header .section-line {
            width: 50px;
            height: 3px;
            background: var(--color-accent);
            margin: 12px auto 0;
            border-radius: 3px;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .related-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
        }

        .related-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: var(--color-accent);
        }

        .related-card .card-thumb {
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background: var(--color-bg-alt);
            position: relative;
        }

        .related-card .card-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .related-card:hover .card-thumb img {
            transform: scale(1.06);
        }

        .related-card .card-body {
            padding: 16px 18px 18px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .related-card .card-category {
            font-size: 11.5px;
            font-weight: 600;
            color: var(--color-accent-dark);
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 6px;
        }

        .related-card .card-title {
            font-size: 15px;
            font-weight: 700;
            color: var(--color-primary);
            line-height: 1.4;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card .card-meta {
            font-size: 12px;
            color: var(--color-text-weak);
            margin-top: auto;
        }

        /* CTA Section */
        .cta-section {
            padding: 60px 0;
            background: var(--color-primary);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(201, 160, 80, 0.15) 0%, transparent 70%);
            border-radius: 50%;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -40%;
            left: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(201, 160, 80, 0.1) 0%, transparent 70%);
            border-radius: 50%;
        }

        .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 600px;
            margin: 0 auto;
        }

        .cta-inner h2 {
            font-size: 30px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
        }

        .cta-inner p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 28px;
            line-height: 1.6;
        }

        .btn-cta-large {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            background: var(--color-accent);
            color: #fff;
            font-weight: 700;
            font-size: 16px;
            border-radius: 30px;
            transition: all var(--transition-base);
            box-shadow: var(--shadow-accent);
            letter-spacing: 0.3px;
        }

        .btn-cta-large:hover {
            background: var(--color-accent-light);
            box-shadow: 0 8px 30px rgba(201, 160, 80, 0.4);
            transform: translateY(-2px);
        }

        /* Not Found State */
        .not-found-state {
            text-align: center;
            padding: 60px 24px;
        }

        .not-found-state .nf-icon {
            font-size: 64px;
            color: var(--color-border);
            margin-bottom: 20px;
        }

        .not-found-state h3 {
            font-size: 22px;
            color: var(--color-primary);
            margin-bottom: 8px;
        }

        .not-found-state p {
            color: var(--color-text-weak);
            margin-bottom: 20px;
        }

        .btn-back-home {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 24px;
            background: var(--color-accent);
            color: #fff;
            font-weight: 600;
            border-radius: 24px;
            font-size: 14px;
            transition: all var(--transition-fast);
        }

        .btn-back-home:hover {
            background: var(--color-accent-dark);
        }

        /* Footer */
        .site-footer {
            background: var(--color-primary);
            color: rgba(255, 255, 255, 0.75);
            padding: 48px 0 28px;
            margin-top: auto;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }

        .footer-logo {
            font-family: var(--font-heading);
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            max-width: 300px;
        }

        .footer-links h5 {
            font-size: 14px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 0.3px;
        }

        .footer-links ul li {
            margin-bottom: 8px;
        }

        .footer-links ul li a {
            font-size: 13.5px;
            color: rgba(255, 255, 255, 0.6);
            transition: color var(--transition-fast);
        }

        .footer-links ul li a:hover {
            color: var(--color-accent-light);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 20px;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .article-sidebar {
                position: static;
                display: grid;
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }

            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .header-search {
                width: 160px;
            }

            .header-search:focus-within {
                width: 190px;
            }
        }

        @media (max-width: 768px) {
            .header-nav {
                display: none;
            }

            .header-search {
                display: none;
            }

            .btn-header-cta {
                font-size: 12.5px;
                padding: 8px 14px;
            }

            .mobile-menu-toggle {
                display: flex;
            }

            .mobile-nav-overlay,
            .mobile-nav-panel {
                display: block;
            }

            .inner-banner {
                min-height: 160px;
            }

            .inner-banner h1 {
                font-size: 22px;
            }

            .article-body {
                padding: 20px 18px 28px;
            }

            .article-body h2.article-title-main {
                font-size: 21px;
            }

            .article-content {
                font-size: 15px;
            }

            .article-sidebar {
                grid-template-columns: 1fr;
            }

            .related-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }

            .section-header h2 {
                font-size: 22px;
            }

            .cta-inner h2 {
                font-size: 24px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }

            .footer-brand {
                grid-column: 1 / -1;
            }

            .header-logo-text {
                font-size: 15px;
            }
        }

        @media (max-width: 520px) {
            .container,
            .container-narrow {
                padding: 0 16px;
            }

            .header-logo-text {
                font-size: 14px;
            }

            .btn-header-cta {
                padding: 7px 12px;
                font-size: 11.5px;
                gap: 4px;
            }

            .header-logo-icon {
                width: 32px;
                height: 32px;
                font-size: 17px;
            }

            .inner-banner {
                min-height: 140px;
            }

            .inner-banner h1 {
                font-size: 19px;
            }

            .article-body {
                padding: 16px 14px 22px;
            }

            .article-body h2.article-title-main {
                font-size: 18px;
            }

            .article-excerpt-box {
                padding: 12px 14px;
                font-size: 13.5px;
            }

            .article-content h2 {
                font-size: 18px;
            }

            .article-content h3 {
                font-size: 16px;
            }

            .article-content {
                font-size: 14.5px;
            }

            .related-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }

            .section-header h2 {
                font-size: 20px;
            }

            .cta-inner h2 {
                font-size: 20px;
            }

            .cta-inner p {
                font-size: 14px;
            }

            .btn-cta-large {
                padding: 12px 24px;
                font-size: 14px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 22px;
            }

            .article-meta-row {
                gap: 10px;
                font-size: 12px;
            }

            .sidebar-card {
                padding: 14px;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #1a2744;
            --primary-light: #243356;
            --primary-dark: #0f1a2e;
            --accent: #c8a45c;
            --accent-light: #d4b76e;
            --accent-dark: #a8873e;
            --accent-glow: rgba(200, 164, 92, 0.18);
            --bg: #f7f5f0;
            --bg-alt: #ede9e1;
            --surface: #ffffff;
            --surface-alt: #faf9f5;
            --text: #1e1e1e;
            --text-secondary: #5c5c5c;
            --text-muted: #8a8a8a;
            --text-on-dark: #e8e4db;
            --text-on-primary: #d5d0c4;
            --border: #e0dcd4;
            --border-light: #ece7de;
            --border-accent: #d4c59e;
            --radius-sm: 6px;
            --radius: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow: 0 4px 16px rgba(0, 0, 0, 0.07), 0 2px 6px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 8px 28px rgba(0, 0, 0, 0.09), 0 3px 10px rgba(0, 0, 0, 0.05);
            --shadow-lg: 0 16px 42px rgba(0, 0, 0, 0.11), 0 5px 16px rgba(0, 0, 0, 0.06);
            --shadow-accent: 0 4px 20px rgba(200, 164, 92, 0.22);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --font-display: 'PingFang SC', 'Microsoft YaHei', 'Noto Serif SC', 'STSong', serif;
            --transition-fast: 0.18s ease;
            --transition: 0.28s ease;
            --transition-slow: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --header-height: 68px;
            --container-max: 1200px;
            --container-narrow: 960px;
            --section-gap: 72px;
            --section-gap-sm: 48px;
        }

        *,
        *::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(--text);
            background: var(--bg);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

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

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

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
        }

        input {
            font-family: inherit;
            font-size: inherit;
        }

        ul {
            list-style: none;
        }

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

        .container-narrow {
            max-width: var(--container-narrow);
        }

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(26, 39, 68, 0.97);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(200, 164, 92, 0.2);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.18);
            height: var(--header-height);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            gap: 24px;
        }

        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.2rem;
            font-weight: 700;
            color: #f0e6d2;
            letter-spacing: 0.03em;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .header-logo .logo-icon {
            width: 34px;
            height: 34px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: #1a2744;
            font-weight: 900;
            flex-shrink: 0;
            box-shadow: 0 2px 10px rgba(200, 164, 92, 0.35);
        }

        .header-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-shrink: 0;
        }

        .header-nav a {
            display: inline-flex;
            align-items: center;
            padding: 8px 18px;
            border-radius: 8px;
            font-size: 0.95rem;
            font-weight: 500;
            color: #c5bfb0;
            transition: all var(--transition-fast);
            position: relative;
            white-space: nowrap;
        }

        .header-nav a:hover {
            color: #f0e6d2;
            background: rgba(255, 255, 255, 0.06);
        }

        .header-nav a.active {
            color: #f0e6d2;
            background: rgba(200, 164, 92, 0.15);
            font-weight: 600;
        }

        .header-nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 2px;
            background: var(--accent);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .header-search {
            position: relative;
            display: flex;
            align-items: center;
        }

        .header-search input {
            width: 180px;
            padding: 9px 14px 9px 36px;
            border-radius: 20px;
            border: 1px solid rgba(200, 164, 92, 0.25);
            background: rgba(255, 255, 255, 0.06);
            color: #e8e4db;
            font-size: 0.88rem;
            outline: none;
            transition: all var(--transition-fast);
        }

        .header-search input::placeholder {
            color: #8a8478;
        }

        .header-search input:focus {
            border-color: var(--accent);
            background: rgba(255, 255, 255, 0.1);
            width: 220px;
            box-shadow: 0 0 0 4px var(--accent-glow);
        }

        .header-search .search-icon {
            position: absolute;
            left: 12px;
            color: #8a8478;
            pointer-events: none;
            font-size: 0.9rem;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 7px;
            padding: 10px 22px;
            border-radius: 22px;
            font-size: 0.9rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .btn-accent {
            background: var(--accent);
            color: #1a2744;
            box-shadow: 0 2px 12px rgba(200, 164, 92, 0.3);
        }

        .btn-accent:hover {
            background: var(--accent-light);
            box-shadow: 0 4px 20px rgba(200, 164, 92, 0.45);
            transform: translateY(-1px);
        }

        .btn-accent:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(200, 164, 92, 0.25);
        }

        .btn-outline-light {
            border: 1.5px solid rgba(200, 164, 92, 0.35);
            color: #e8e4db;
            background: transparent;
        }

        .btn-outline-light:hover {
            border-color: var(--accent);
            background: rgba(200, 164, 92, 0.1);
        }

        /* Mobile menu toggle */
        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 6px;
            cursor: pointer;
            z-index: 101;
        }

        .menu-toggle span {
            width: 26px;
            height: 2.5px;
            background: #d5d0c4;
            border-radius: 2px;
            transition: all var(--transition-fast);
        }

        /* Main */
        .main-content {
            flex: 1;
        }

        /* Category Hero */
        .category-hero {
            position: relative;
            background: var(--primary-dark);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            padding: 80px 0 64px;
            overflow: hidden;
            isolation: isolate;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(15, 26, 46, 0.82) 0%, rgba(26, 39, 68, 0.9) 60%, rgba(26, 39, 68, 0.96) 100%);
            z-index: 1;
        }

        .category-hero::after {
            content: '';
            position: absolute;
            top: -40%;
            right: -15%;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(200, 164, 92, 0.12) 0%, transparent 70%);
            z-index: 1;
        }

        .category-hero .container {
            position: relative;
            z-index: 2;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 20px;
            font-size: 0.88rem;
            color: #b0a890;
        }

        .breadcrumb a {
            color: #c5bfb0;
            transition: color var(--transition-fast);
        }

        .breadcrumb a:hover {
            color: var(--accent-light);
        }

        .breadcrumb .sep {
            color: #6a6458;
        }

        .breadcrumb .current {
            color: var(--accent-light);
            font-weight: 500;
        }

        .category-hero-content {
            max-width: 700px;
        }

        .category-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: 20px;
            background: rgba(200, 164, 92, 0.18);
            border: 1px solid rgba(200, 164, 92, 0.3);
            color: var(--accent-light);
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            margin-bottom: 18px;
        }

        .category-hero-content h1 {
            font-family: var(--font-display);
            font-size: 2.8rem;
            font-weight: 700;
            color: #f0e6d2;
            line-height: 1.25;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }

        .category-hero-content h1 .highlight {
            color: var(--accent-light);
            position: relative;
        }

        .category-hero-content .hero-desc {
            font-size: 1.1rem;
            color: #c5bfb0;
            line-height: 1.75;
            margin-bottom: 28px;
        }

        .category-stats {
            display: flex;
            gap: 28px;
            flex-wrap: wrap;
        }

        .category-stat {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .category-stat .stat-num {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--accent-light);
            line-height: 1;
        }

        .category-stat .stat-label {
            font-size: 0.85rem;
            color: #9a9488;
            line-height: 1.3;
        }

        /* Section */
        .section {
            padding: var(--section-gap) 0;
        }

        .section-sm {
            padding: var(--section-gap-sm) 0;
        }

        .section-header {
            margin-bottom: 40px;
        }

        .section-label {
            display: inline-block;
            font-size: 0.82rem;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent-dark);
            margin-bottom: 10px;
        }

        .section-title {
            font-family: var(--font-display);
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.3;
            letter-spacing: 0.02em;
        }

        .section-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            margin-top: 10px;
            line-height: 1.7;
            max-width: 620px;
        }

        /* Strategy Grid */
        .strategy-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .strategy-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
            border: 1px solid var(--border-light);
            position: relative;
        }

        .strategy-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--border-accent);
        }

        .strategy-card .card-img-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 10;
            background: var(--bg-alt);
        }

        .strategy-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .strategy-card:hover .card-img-wrap img {
            transform: scale(1.06);
        }

        .strategy-card .card-level {
            position: absolute;
            top: 14px;
            left: 14px;
            padding: 5px 12px;
            border-radius: 14px;
            font-size: 0.78rem;
            font-weight: 700;
            letter-spacing: 0.05em;
            z-index: 2;
        }

        .level-beginner {
            background: #e8f5e9;
            color: #2e7d32;
            border: 1px solid #a5d6a7;
        }

        .level-intermediate {
            background: #fff3e0;
            color: #e65100;
            border: 1px solid #ffcc80;
        }

        .level-advanced {
            background: #fce4ec;
            color: #c62828;
            border: 1px solid #ef9a9a;
        }

        .strategy-card .card-body {
            padding: 20px 22px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .strategy-card .card-tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }

        .tag {
            display: inline-block;
            padding: 3px 10px;
            border-radius: 12px;
            font-size: 0.78rem;
            font-weight: 500;
            letter-spacing: 0.03em;
            background: var(--bg-alt);
            color: var(--text-secondary);
            border: 1px solid var(--border-light);
        }

        .strategy-card .card-title {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.4;
            margin: 0;
        }

        .strategy-card .card-title a {
            color: inherit;
            transition: color var(--transition-fast);
        }

        .strategy-card .card-title a:hover {
            color: var(--accent-dark);
        }

        .strategy-card .card-excerpt {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
            flex: 1;
        }

        .strategy-card .card-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.82rem;
            color: var(--text-muted);
            padding-top: 6px;
            border-top: 1px solid var(--border-light);
        }

        .strategy-card .card-meta .meta-stat {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        /* Featured Strategy (wide card) */
        .strategy-featured {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0;
            background: var(--surface);
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-light);
            margin-bottom: 32px;
            transition: all var(--transition);
        }

        .strategy-featured:hover {
            box-shadow: var(--shadow-lg);
            border-color: var(--border-accent);
        }

        .strategy-featured .featured-img {
            aspect-ratio: 4 / 3;
            overflow: hidden;
            background: var(--bg-alt);
        }

        .strategy-featured .featured-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .strategy-featured:hover .featured-img img {
            transform: scale(1.04);
        }

        .strategy-featured .featured-body {
            padding: 32px 36px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            gap: 14px;
        }

        .strategy-featured .featured-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 5px 14px;
            border-radius: 14px;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.05em;
            background: rgba(200, 164, 92, 0.13);
            color: #a8873e;
            border: 1px solid rgba(200, 164, 92, 0.3);
            width: fit-content;
        }

        .strategy-featured .featured-title {
            font-family: var(--font-display);
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.3;
        }

        .strategy-featured .featured-desc {
            font-size: 1rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .strategy-featured .featured-meta {
            display: flex;
            gap: 20px;
            font-size: 0.85rem;
            color: var(--text-muted);
            padding-top: 8px;
            border-top: 1px solid var(--border-light);
        }

        /* Process / Steps */
        .steps-list {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            counter-reset: step;
        }

        .step-item {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            position: relative;
            transition: all var(--transition);
            text-align: center;
            counter-increment: step;
        }

        .step-item:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--border-accent);
            transform: translateY(-3px);
        }

        .step-item::before {
            content: counter(step);
            display: flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary);
            color: var(--accent-light);
            font-size: 1.2rem;
            font-weight: 700;
            margin: 0 auto 16px;
            box-shadow: 0 4px 14px rgba(26, 39, 68, 0.25);
        }

        .step-item h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }

        .step-item p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* Ranking Table */
        .ranking-table-wrap {
            background: var(--surface);
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
        }

        .ranking-table {
            width: 100%;
            border-collapse: collapse;
        }

        .ranking-table thead th {
            background: var(--primary);
            color: #d5d0c4;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            padding: 14px 20px;
            text-align: left;
            white-space: nowrap;
        }

        .ranking-table tbody td {
            padding: 14px 20px;
            border-bottom: 1px solid var(--border-light);
            font-size: 0.93rem;
            color: var(--text);
            vertical-align: middle;
        }

        .ranking-table tbody tr {
            transition: background var(--transition-fast);
        }

        .ranking-table tbody tr:hover {
            background: var(--surface-alt);
        }

        .ranking-table tbody tr:last-child td {
            border-bottom: none;
        }

        .rank-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            font-weight: 700;
            font-size: 0.9rem;
        }

        .rank-1 {
            background: #fff8e1;
            color: #b8860b;
            border: 2px solid #ffd54f;
        }
        .rank-2 {
            background: #f5f5f5;
            color: #616161;
            border: 2px solid #bdbdbd;
        }
        .rank-3 {
            background: #fef1e4;
            color: #a0522d;
            border: 2px solid #e0a06e;
        }
        .rank-other {
            background: var(--bg-alt);
            color: var(--text-muted);
            border: 1.5px solid var(--border);
        }

        .rank-difficulty {
            display: inline-block;
            padding: 3px 10px;
            border-radius: 10px;
            font-size: 0.78rem;
            font-weight: 600;
        }

        .diff-easy {
            background: #e8f5e9;
            color: #2e7d32;
        }
        .diff-medium {
            background: #fff8e1;
            color: #f57f17;
        }
        .diff-hard {
            background: #fce4ec;
            color: #c62828;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 800px;
        }

        .faq-item {
            background: var(--surface);
            border-radius: var(--radius);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all var(--transition-fast);
        }

        .faq-item:hover {
            border-color: var(--border-accent);
            box-shadow: var(--shadow-sm);
        }

        .faq-q {
            padding: 18px 22px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--primary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            user-select: none;
        }

        .faq-q .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--bg-alt);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            color: var(--accent-dark);
            transition: all var(--transition-fast);
            font-weight: 700;
        }

        .faq-a {
            padding: 0 22px 18px;
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.7;
            display: none;
        }

        .faq-item.open .faq-a {
            display: block;
        }

        .faq-item.open .faq-icon {
            background: var(--accent);
            color: #fff;
        }

        .faq-item.open {
            border-color: var(--border-accent);
            box-shadow: var(--shadow-accent);
        }

        /* CTA Section */
        .cta-section {
            background: var(--primary);
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            position: relative;
            isolation: isolate;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26, 39, 68, 0.94) 0%, rgba(15, 26, 46, 0.9) 100%);
            z-index: 1;
        }

        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }

        .cta-section .section-title {
            color: #f0e6d2;
        }

        .cta-section .section-desc {
            color: #c5bfb0;
            margin: 0 auto 28px;
        }

        .cta-buttons {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn-lg {
            padding: 13px 32px;
            font-size: 1rem;
            border-radius: 26px;
            font-weight: 700;
            letter-spacing: 0.03em;
        }

        .btn-primary-outline {
            border: 2px solid rgba(200, 164, 92, 0.5);
            color: #f0e6d2;
            background: transparent;
        }

        .btn-primary-outline:hover {
            border-color: var(--accent);
            background: rgba(200, 164, 92, 0.12);
            box-shadow: var(--shadow-accent);
            transform: translateY(-2px);
        }

        /* Footer */
        .site-footer {
            background: var(--primary-dark);
            color: #c5bfb0;
            padding: 56px 0 28px;
            border-top: 3px solid rgba(200, 164, 92, 0.25);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }

        .footer-logo {
            font-size: 1.25rem;
            font-weight: 700;
            color: #f0e6d2;
            letter-spacing: 0.03em;
            margin-bottom: 10px;
        }

        .footer-brand p {
            font-size: 0.9rem;
            color: #9a9488;
            line-height: 1.7;
            max-width: 280px;
        }

        .footer-links h5 {
            font-size: 0.9rem;
            font-weight: 700;
            letter-spacing: 0.06em;
            color: #d5d0c4;
            margin-bottom: 14px;
            text-transform: uppercase;
        }

        .footer-links ul {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-links ul li a {
            font-size: 0.9rem;
            color: #9a9488;
            transition: color var(--transition-fast);
        }

        .footer-links ul li a:hover {
            color: var(--accent-light);
        }

        .footer-bottom {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(200, 164, 92, 0.15);
            font-size: 0.84rem;
            color: #6a6458;
            letter-spacing: 0.02em;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .strategy-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-list {
                grid-template-columns: repeat(2, 1fr);
            }
            .strategy-featured {
                grid-template-columns: 1fr;
            }
            .strategy-featured .featured-body {
                padding: 24px 28px;
            }
            .category-hero-content h1 {
                font-size: 2.2rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 768px) {
            .header-nav {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(26, 39, 68, 0.98);
                flex-direction: column;
                padding: 12px 16px;
                gap: 2px;
                border-bottom: 2px solid rgba(200, 164, 92, 0.3);
                box-shadow: var(--shadow-lg);
                z-index: 99;
            }
            .header-nav.open {
                display: flex;
            }
            .header-nav a {
                width: 100%;
                padding: 12px 16px;
                border-radius: 8px;
            }
            .menu-toggle {
                display: flex;
            }
            .header-search input {
                width: 130px;
            }
            .header-search input:focus {
                width: 160px;
            }
            .btn {
                padding: 8px 16px;
                font-size: 0.84rem;
            }
            .strategy-grid {
                grid-template-columns: 1fr;
            }
            .steps-list {
                grid-template-columns: 1fr 1fr;
            }
            .strategy-featured {
                grid-template-columns: 1fr;
            }
            .strategy-featured .featured-body {
                padding: 20px 22px;
            }
            .strategy-featured .featured-title {
                font-size: 1.3rem;
            }
            .category-hero-content h1 {
                font-size: 1.8rem;
            }
            .category-stats {
                gap: 18px;
            }
            .category-stat .stat-num {
                font-size: 1.4rem;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .ranking-table-wrap {
                overflow-x: auto;
                -webkit-overflow-scrolling: touch;
            }
            .ranking-table {
                min-width: 640px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .section {
                padding: 48px 0;
            }
        }

        @media (max-width: 520px) {
            .header-logo {
                font-size: 1rem;
                gap: 6px;
            }
            .header-logo .logo-icon {
                width: 28px;
                height: 28px;
                font-size: 0.9rem;
            }
            .header-search input {
                width: 100px;
                font-size: 0.8rem;
            }
            .header-search input:focus {
                width: 130px;
            }
            .btn {
                padding: 7px 13px;
                font-size: 0.8rem;
                border-radius: 18px;
            }
            .category-hero {
                padding: 50px 0 36px;
            }
            .category-hero-content h1 {
                font-size: 1.5rem;
            }
            .category-hero-content .hero-desc {
                font-size: 0.95rem;
            }
            .category-stats {
                gap: 14px;
            }
            .steps-list {
                grid-template-columns: 1fr;
            }
            .strategy-card .card-body {
                padding: 14px 16px 18px;
            }
            .strategy-card .card-title {
                font-size: 1.02rem;
            }
            .cta-buttons {
                flex-direction: column;
                align-items: center;
            }
            .btn-lg {
                width: 100%;
                max-width: 300px;
            }
            .section-title {
                font-size: 1.35rem;
            }
            .footer-bottom {
                font-size: 0.78rem;
            }
        }