/* roulang page: index */
/* ============ CSS Design Tokens ============ */
        :root {
            --primary: #1F2937;
            --primary-dark: #111827;
            --primary-light: #374151;
            --accent: #22C55E;
            --accent-strong: #16A34A;
            --accent-soft: rgba(34, 197, 94, 0.12);
            --accent-glow: rgba(34, 197, 94, 0.22);
            --accent-2: #06B6D4;
            --accent-2-soft: rgba(6, 182, 212, 0.10);
            --bg: #F5F7FA;
            --bg-alt: #EEF1F5;
            --card: #FFFFFF;
            --text: #1F2937;
            --text-secondary: #4B5563;
            --text-muted: #6B7280;
            --border: #E5E7EB;
            --border-light: #F0F2F5;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-full: 9999px;
            --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 28px rgba(0, 0, 0, 0.12);
            --shadow-hover: 0 10px 30px rgba(0, 0, 0, 0.14);
            --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            --font-mono: "SF Mono", "Fira Code", "Cascadia Code", monospace;
            --transition: 0.2s ease;
            --transition-slow: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --nav-height: 64px;
            --container-max: 1200px;
            --gutter: 24px;
            --section-pad: 72px;
            --section-pad-mobile: 40px;
        }

        /* ============ Base Reset ============ */
        *,
        *::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: 17px;
            font-weight: 400;
            line-height: 1.65;
            color: var(--text);
            background-color: var(--bg);
            overflow-x: hidden;
            -webkit-tap-highlight-color: transparent;
        }

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

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
            -webkit-appearance: none;
            appearance: none;
        }

        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: var(--text);
            margin-bottom: 0.5em;
        }

        h1 {
            font-size: clamp(2rem, 4.5vw, 3rem);
            letter-spacing: -0.02em;
        }
        h2 {
            font-size: clamp(1.5rem, 3vw, 2.1rem);
            letter-spacing: -0.01em;
        }
        h3 {
            font-size: clamp(1.15rem, 2vw, 1.4rem);
        }
        h4 {
            font-size: 1.1rem;
        }

        p {
            margin-bottom: 1rem;
        }

        ul,
        ol {
            list-style-position: inside;
            margin-bottom: 1rem;
        }

        section {
            padding: var(--section-pad) 0;
            position: relative;
        }

        .bg-white-section {
            background: var(--card);
        }
        .bg-alt-section {
            background: var(--bg-alt);
        }
        .bg-dark-section {
            background: var(--primary);
            color: #E5E7EB;
        }
        .bg-dark-section h2,
        .bg-dark-section h3 {
            color: #FFFFFF;
        }

        /* ============ Container ============ */
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: var(--gutter);
            padding-right: var(--gutter);
        }

        /* ============ Header / Navigation ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            padding: 14px var(--gutter) 0;
            transition: padding var(--transition-slow);
            pointer-events: none;
        }

        .site-header .nav-shell {
            pointer-events: auto;
            max-width: var(--container-max);
            margin: 0 auto;
            background: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid rgba(229, 231, 235, 0.6);
            padding: 0 20px;
            height: 60px;
            display: flex;
            align-items: center;
            transition: box-shadow var(--transition-slow), background var(--transition-slow), height var(--transition-slow);
        }
        .site-header.scrolled .nav-shell {
            box-shadow: var(--shadow-lg);
            background: rgba(255, 255, 255, 0.98);
            height: 56px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--text);
            white-space: nowrap;
            line-height: 1.2;
        }
        .nav-logo .logo-mark {
            width: 34px;
            height: 34px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--accent), var(--accent-2));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 0.95rem;
            flex-shrink: 0;
            font-weight: 800;
        }
        .nav-logo:hover {
            color: var(--text);
        }

        .nav-menu-wrap {
            display: flex;
            align-items: center;
            margin-left: auto;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-menu li {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-menu a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 4px;
            position: relative;
            white-space: nowrap;
            border-radius: 6px;
            transition: color var(--transition), background var(--transition);
        }
        .nav-menu a:hover {
            color: var(--text);
        }
        .nav-menu a.active {
            color: var(--accent-strong);
            background: var(--accent-soft);
            padding: 8px 14px;
            border-radius: var(--radius-full);
        }
        .nav-menu a:not(.active)::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            transform: scaleX(0);
            transform-origin: left;
            transition: transform var(--transition-slow);
        }
        .nav-menu a:not(.active):hover::after {
            transform: scaleX(1);
        }

        .nav-hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            margin-left: 16px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
            border: none;
            background: transparent;
            cursor: pointer;
            -webkit-appearance: none;
            appearance: none;
        }
        .nav-hamburger span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: transform var(--transition-slow), opacity var(--transition);
        }
        .nav-hamburger:hover {
            background: var(--bg-alt);
        }
        .nav-hamburger[aria-expanded="true"] span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-hamburger[aria-expanded="true"] span:nth-child(2) {
            opacity: 0;
        }
        .nav-hamburger[aria-expanded="true"] span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* Mobile nav panel */
        .nav-mobile-panel {
            display: none;
            position: absolute;
            top: calc(100% + 12px);
            left: var(--gutter);
            right: var(--gutter);
            background: #FFFFFF;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border);
            padding: 16px 20px 20px;
            z-index: 999;
        }
        .nav-mobile-panel.is-open {
            display: block;
        }
        .nav-mobile-panel ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .nav-mobile-panel li {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-mobile-panel a {
            display: block;
            padding: 14px 16px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 1rem;
            color: var(--text);
            transition: background var(--transition), color var(--transition);
        }
        .nav-mobile-panel a:hover {
            background: var(--bg-alt);
            color: var(--text);
        }
        .nav-mobile-panel a.active {
            background: var(--accent-soft);
            color: var(--accent-strong);
        }

        @media (max-width: 768px) {
            .nav-menu-wrap .nav-menu {
                display: none;
            }
            .nav-hamburger {
                display: flex;
            }
            .site-header {
                padding: 10px 14px 0;
            }
            .site-header .nav-shell {
                height: 54px;
                padding: 0 16px;
            }
        }

        /* ============ Buttons ============ */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            font-size: 0.95rem;
            line-height: 1.2;
            border-radius: var(--radius-sm);
            padding: 13px 26px;
            border: 1px solid transparent;
            cursor: pointer;
            transition: all var(--transition);
            text-align: center;
            -webkit-appearance: none;
            appearance: none;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--accent);
            color: #FFFFFF;
            box-shadow: 0 2px 10px rgba(34, 197, 94, 0.3);
        }
        .btn-primary:hover {
            background: var(--accent-strong);
            color: #FFFFFF;
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(34, 197, 94, 0.4);
        }
        .btn-primary:active {
            transform: translateY(1px);
            box-shadow: 0 2px 6px rgba(34, 197, 94, 0.25);
        }

        .btn-secondary {
            background: transparent;
            color: var(--text);
            border-color: var(--border);
            box-shadow: var(--shadow-sm);
        }
        .btn-secondary:hover {
            background: var(--bg-alt);
            border-color: var(--text-secondary);
            color: var(--text);
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }
        .btn-secondary:active {
            transform: translateY(1px);
            box-shadow: var(--shadow-sm);
        }

        .btn-dark {
            background: var(--primary);
            color: #FFFFFF;
            box-shadow: var(--shadow-sm);
        }
        .btn-dark:hover {
            background: var(--primary-dark);
            color: #FFFFFF;
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }

        .btn-sm {
            padding: 9px 18px;
            font-size: 0.85rem;
            border-radius: 6px;
        }
        .btn-lg {
            padding: 16px 32px;
            font-size: 1.05rem;
            border-radius: var(--radius-md);
        }

        .btn-block {
            width: 100%;
        }

        @media (max-width: 640px) {
            .btn {
                padding: 12px 20px;
                font-size: 0.9rem;
            }
            .btn-block-mobile {
                display: flex;
                width: 100%;
            }
        }

        /* ============ Badge / Tag ============ */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            padding: 5px 12px;
            border-radius: var(--radius-full);
            font-size: 0.8rem;
            font-weight: 600;
            line-height: 1.3;
            background: var(--accent-soft);
            color: var(--accent-strong);
            transition: background var(--transition);
        }
        .badge-outline {
            background: transparent;
            border: 1px solid var(--border);
            color: var(--text-muted);
        }
        .badge-dark {
            background: rgba(255, 255, 255, 0.1);
            color: #E5E7EB;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }
        .badge-accent2 {
            background: var(--accent-2-soft);
            color: #0891B2;
        }

        /* ============ Section Titles ============ */
        .section-header {
            margin-bottom: 36px;
            max-width: 720px;
        }
        .section-header .section-badge {
            display: inline-block;
            font-size: 0.82rem;
            font-weight: 600;
            color: var(--accent-strong);
            background: var(--accent-soft);
            padding: 6px 16px;
            border-radius: var(--radius-full);
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }
        .section-header h2 {
            margin-bottom: 12px;
        }
        .section-header p {
            color: var(--text-secondary);
            font-size: 1.05rem;
            line-height: 1.7;
            margin-bottom: 0;
        }
        .section-header.center {
            text-align: center;
            margin-left: auto;
            margin-right: auto;
        }

        /* ============ Cards ============ */
        .card {
            background: var(--card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: transform var(--transition-slow), box-shadow var(--transition-slow), border-color var(--transition);
            height: 100%;
        }
        .card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(34, 197, 94, 0.4);
        }
        .card .card-body {
            padding: 20px 22px;
        }
        .card .card-image {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 9;
            background: var(--bg-alt);
        }
        .card .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .card:hover .card-image img {
            transform: scale(1.04);
        }
        .card .card-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            z-index: 2;
        }
        .card .card-title {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
            color: var(--text);
        }
        .card .card-desc {
            color: var(--text-secondary);
            font-size: 0.92rem;
            line-height: 1.65;
            margin-bottom: 12px;
        }
        .card .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.82rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }
        .card .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            font-size: 0.88rem;
            color: var(--accent-strong);
            transition: color var(--transition);
        }
        .card .card-link:hover {
            color: var(--accent);
        }

        /* ============ Grid Gaps ============ */
        .grid-gap {
            margin: -10px;
        }
        .grid-gap > .cell {
            padding: 10px;
        }
        .grid-gap-24 {
            margin: -12px;
        }
        .grid-gap-24 > .cell {
            padding: 12px;
        }

        /* ============ Hero ============ */
        .hero-section {
            padding: 0;
            position: relative;
            background: var(--bg);
            overflow: hidden;
            min-height: 640px;
            display: flex;
            align-items: center;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: -20%;
            right: -10%;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(34, 197, 94, 0.10), transparent 70%);
            pointer-events: none;
        }
        .hero-section::after {
            content: '';
            position: absolute;
            bottom: -15%;
            left: -5%;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(6, 182, 212, 0.07), transparent 70%);
            pointer-events: none;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            z-index: 0;
            background-image: url('/assets/images/1ef8684293fca76c.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.10;
            pointer-events: none;
        }
        .hero-section .container {
            position: relative;
            z-index: 1;
            display: flex;
            align-items: center;
            gap: 48px;
            min-height: 640px;
            padding-top: 40px;
            padding-bottom: 40px;
        }
        .hero-content {
            flex: 1;
            min-width: 0;
        }
        .hero-content .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--accent-strong);
            background: var(--accent-soft);
            padding: 8px 16px;
            border-radius: var(--radius-full);
            margin-bottom: 20px;
        }
        .hero-content h1 {
            margin-bottom: 20px;
            color: var(--text);
        }
        .hero-content .hero-desc {
            font-size: 1.1rem;
            line-height: 1.75;
            color: var(--text-secondary);
            margin-bottom: 28px;
            max-width: 600px;
        }
        .hero-cta-group {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 24px;
        }
        .hero-stats-inline {
            display: flex;
            gap: 28px;
            flex-wrap: wrap;
        }
        .hero-stat-item {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }
        .hero-stat-item strong {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.01em;
        }
        .hero-stat-item span {
            font-size: 0.82rem;
            color: var(--text-muted);
        }

        /* Hero questionnaire visual */
        .hero-visual {
            flex: 0 0 440px;
            max-width: 440px;
            position: relative;
        }
        .quiz-preview-card {
            background: var(--card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border);
            padding: 28px 26px;
            position: relative;
            overflow: hidden;
        }
        .quiz-preview-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--accent), var(--accent-2));
        }
        .quiz-card-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 20px;
        }
        .quiz-card-header h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 0;
        }
        .quiz-card-header .quiz-step-tag {
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--accent-strong);
            background: var(--accent-soft);
            padding: 4px 12px;
            border-radius: var(--radius-full);
        }
        .quiz-question-preview {
            margin-bottom: 16px;
        }
        .quiz-question-preview .q-label {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-secondary);
            margin-bottom: 8px;
            display: block;
        }
        .quiz-option-row {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }
        .quiz-option {
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            font-size: 0.82rem;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg);
            cursor: default;
            transition: all var(--transition);
        }
        .quiz-option.selected {
            border-color: var(--accent);
            color: var(--accent-strong);
            background: var(--accent-soft);
            font-weight: 600;
        }
        .quiz-result-preview {
            background: var(--bg-alt);
            border-radius: var(--radius-sm);
            padding: 16px 18px;
            display: flex;
            align-items: center;
            gap: 14px;
            margin-bottom: 18px;
            border: 1px dashed var(--border);
        }
        .quiz-result-preview .result-icon {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--accent-soft), var(--accent-2-soft));
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-strong);
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .quiz-result-preview .result-text {
            flex: 1;
            min-width: 0;
        }
        .quiz-result-preview .result-text strong {
            display: block;
            font-size: 0.92rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 2px;
        }
        .quiz-result-preview .result-text span {
            font-size: 0.82rem;
            color: var(--text-muted);
        }
        .quiz-start-btn {
            width: 100%;
        }

        @media (max-width: 1024px) {
            .hero-section .container {
                flex-direction: column;
                gap: 36px;
                padding-top: 30px;
                padding-bottom: 40px;
            }
            .hero-content {
                text-align: center;
            }
            .hero-content .hero-desc {
                margin-left: auto;
                margin-right: auto;
            }
            .hero-cta-group {
                justify-content: center;
            }
            .hero-stats-inline {
                justify-content: center;
            }
            .hero-visual {
                flex: 0 0 auto;
                max-width: 520px;
                width: 100%;
            }
        }
        @media (max-width: 640px) {
            .hero-section {
                min-height: auto;
            }
            .hero-section .container {
                min-height: auto;
                padding-top: 28px;
                padding-bottom: 36px;
            }
            .quiz-preview-card {
                padding: 20px 18px;
            }
            .hero-stat-item strong {
                font-size: 1.1rem;
            }
        }

        /* ============ Pain Points Section ============ */
        .pain-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 20px;
        }
        .pain-card {
            background: var(--card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            padding: 24px 22px;
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition-slow), box-shadow var(--transition-slow);
        }
        .pain-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .pain-card .pain-icon {
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            background: var(--bg-alt);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--text-secondary);
            margin-bottom: 14px;
        }
        .pain-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .pain-card p {
            font-size: 0.92rem;
            line-height: 1.65;
            color: var(--text-secondary);
            margin-bottom: 0;
        }

        /* ============ Capability / Solution Cards ============ */
        .cap-card {
            background: var(--card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            padding: 26px 24px;
            box-shadow: var(--shadow-sm);
            height: 100%;
            transition: transform var(--transition-slow), box-shadow var(--transition-slow), border-color var(--transition);
        }
        .cap-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(34, 197, 94, 0.45);
        }
        .cap-card .cap-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--accent-soft), var(--accent-2-soft));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--accent-strong);
            margin-bottom: 16px;
        }
        .cap-card h3 {
            font-size: 1.08rem;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .cap-card p {
            font-size: 0.92rem;
            line-height: 1.65;
            color: var(--text-secondary);
            margin-bottom: 0;
        }

        /* ============ Steps / Timeline ============ */
        .steps-horizontal {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 20px 12px;
            counter-reset: step-counter;
        }
        .step-item {
            position: relative;
            padding: 24px 20px 20px;
            background: var(--card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            counter-increment: step-counter;
            transition: transform var(--transition-slow), box-shadow var(--transition-slow);
            box-shadow: var(--shadow-sm);
        }
        .step-item:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .step-item::before {
            content: counter(step-counter);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: var(--primary);
            color: #FFFFFF;
            font-weight: 700;
            font-size: 0.9rem;
            margin-bottom: 14px;
        }
        .step-item h3 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .step-item p {
            font-size: 0.86rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 0;
        }

        /* ============ Stats / Data Dashboard ============ */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 18px;
        }
        .stat-card {
            background: var(--card);
            border-radius: var(--radius-md);
            padding: 22px 20px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            text-align: center;
            transition: transform var(--transition-slow);
        }
        .stat-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .stat-card .stat-number {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.02em;
            line-height: 1.1;
            margin-bottom: 6px;
            display: block;
        }
        .stat-card .stat-number .stat-unit {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-muted);
            margin-left: 2px;
        }
        .stat-card .stat-label {
            font-size: 0.88rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* ============ Testimonials ============ */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 20px;
        }
        .testimonial-card {
            background: var(--card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            padding: 22px 22px 20px;
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .testimonial-card .quote-text {
            font-size: 0.95rem;
            line-height: 1.7;
            color: var(--text-secondary);
            margin-bottom: 0;
            flex: 1;
        }
        .testimonial-card .quote-author {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .testimonial-card .author-avatar {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--bg-alt);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.9rem;
            color: var(--text-muted);
            flex-shrink: 0;
            border: 1px solid var(--border);
        }
        .testimonial-card .author-info strong {
            display: block;
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--text);
        }
        .testimonial-card .author-info span {
            font-size: 0.78rem;
            color: var(--text-muted);
        }

        /* ============ Audience / Tag Matrix ============ */
        .audience-wrap {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: flex-start;
        }
        .audience-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 20px;
            border-radius: var(--radius-full);
            border: 1px solid var(--border);
            background: var(--card);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
            cursor: default;
        }
        .audience-tag:hover {
            border-color: var(--accent);
            color: var(--accent-strong);
            background: var(--accent-soft);
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm);
        }
        .audience-tag .tag-icon {
            font-size: 0.95rem;
            color: var(--accent);
        }

        /* ============ Metric Bars ============ */
        .metric-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
            max-width: 720px;
            margin: 0 auto;
        }
        .metric-item {
            display: grid;
            grid-template-columns: auto 1fr auto;
            gap: 16px;
            align-items: center;
        }
        .metric-item .metric-name {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text);
            min-width: 100px;
        }
        .metric-item .metric-bar {
            height: 10px;
            border-radius: 5px;
            background: var(--bg-alt);
            overflow: hidden;
            position: relative;
        }
        .metric-item .metric-bar .fill {
            height: 100%;
            border-radius: 5px;
            background: linear-gradient(90deg, var(--accent), var(--accent-2));
            transition: width 0.8s ease;
            width: 0;
        }
        .metric-item .metric-value {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--accent-strong);
            min-width: 60px;
            text-align: right;
        }

        /* ============ Topic Cards / Featured ============ */
        .topic-card {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            aspect-ratio: 3 / 2;
            box-shadow: var(--shadow-md);
            transition: transform var(--transition-slow), box-shadow var(--transition-slow);
            display: block;
        }
        .topic-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .topic-card img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            position: absolute;
            inset: 0;
        }
        .topic-card .topic-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(17, 24, 39, 0.1) 0%, rgba(17, 24, 39, 0.78) 100%);
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            padding: 20px 22px;
            z-index: 1;
        }
        .topic-card .topic-overlay h3 {
            color: #FFFFFF;
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 4px;
        }
        .topic-card .topic-overlay span {
            color: rgba(255, 255, 255, 0.82);
            font-size: 0.82rem;
        }
        .topic-card .topic-arrow {
            position: absolute;
            top: 16px;
            right: 16px;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.2);
            backdrop-filter: blur(6px);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #FFFFFF;
            font-size: 0.85rem;
            z-index: 2;
            transition: background var(--transition);
        }
        .topic-card:hover .topic-arrow {
            background: rgba(255, 255, 255, 0.35);
        }

        /* ============ Update Log / Timeline ============ */
        .log-timeline {
            position: relative;
            padding-left: 28px;
            max-width: 720px;
            margin: 0 auto;
        }
        .log-timeline::before {
            content: '';
            position: absolute;
            left: 8px;
            top: 8px;
            bottom: 8px;
            width: 2px;
            background: var(--border);
            border-radius: 2px;
        }
        .log-entry {
            position: relative;
            padding: 0 0 20px 16px;
            margin-bottom: 4px;
        }
        .log-entry::before {
            content: '';
            position: absolute;
            left: -24px;
            top: 8px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--accent);
            border: 3px solid #FFFFFF;
            box-shadow: 0 0 0 2px var(--accent-soft);
        }
        .log-entry .log-date {
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--text-muted);
            margin-bottom: 4px;
        }
        .log-entry .log-title {
            font-size: 0.98rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 4px;
        }
        .log-entry .log-desc {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 0;
        }

        /* ============ CMS List / News ============ */
        .cms-section {
            background: var(--card);
        }
        .cms-list-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 20px;
        }
        .cms-card {
            background: var(--card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            padding: 20px 22px;
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition-slow), box-shadow var(--transition-slow), border-color var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .cms-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
            border-color: rgba(34, 197, 94, 0.45);
        }
        .cms-card .cms-card-badge {
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--accent-strong);
            background: var(--accent-soft);
            padding: 4px 12px;
            border-radius: var(--radius-full);
            display: inline-block;
            margin-bottom: 10px;
            align-self: flex-start;
        }
        .cms-card .cms-card-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
            line-height: 1.45;
        }
        .cms-card .cms-card-summary {
            font-size: 0.9rem;
            line-height: 1.65;
            color: var(--text-secondary);
            margin-bottom: 12px;
            flex: 1;
        }
        .cms-card .cms-card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .cms-empty {
            text-align: center;
            padding: 48px 20px;
            color: var(--text-muted);
            font-size: 0.95rem;
            background: var(--bg-alt);
            border-radius: var(--radius-md);
            border: 1px dashed var(--border);
        }
        .cms-empty i {
            font-size: 1.5rem;
            display: block;
            margin-bottom: 10px;
            color: var(--text-muted);
        }

        /* ============ Collection / Directory ============ */
        .collection-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 18px;
        }
        .collection-card {
            background: var(--card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            padding: 22px 20px;
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
            gap: 8px;
            transition: transform var(--transition-slow), box-shadow var(--transition-slow), border-color var(--transition);
        }
        .collection-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
            border-color: rgba(34, 197, 94, 0.4);
        }
        .collection-card .coll-icon {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: var(--bg-alt);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: var(--text-secondary);
            margin-bottom: 4px;
        }
        .collection-card h3 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 2px;
        }
        .collection-card .coll-count {
            font-size: 0.82rem;
            color: var(--text-muted);
        }
        .collection-card .coll-link {
            font-weight: 600;
            font-size: 0.85rem;
            color: var(--accent-strong);
            align-self: flex-start;
        }
        .collection-card .coll-link:hover {
            color: var(--accent);
        }

        /* ============ Subscribe / CTA ============ */
        .subscribe-section {
            background: linear-gradient(135deg, var(--primary) 0%, #1F2937 55%, #111827 100%);
            position: relative;
            overflow: hidden;
        }
        .subscribe-section::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -10%;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(34, 197, 94, 0.12), transparent 70%);
            pointer-events: none;
        }
        .subscribe-section::after {
            content: '';
            position: absolute;
            bottom: -25%;
            left: -8%;
            width: 350px;
            height: 350px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(6, 182, 212, 0.10), transparent 70%);
            pointer-events: none;
        }
        .subscribe-box {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 560px;
            margin: 0 auto;
        }
        .subscribe-box h2 {
            color: #FFFFFF;
            margin-bottom: 14px;
        }
        .subscribe-box p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 1rem;
            line-height: 1.7;
            margin-bottom: 28px;
        }
        .subscribe-form {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
            margin-bottom: 16px;
        }
        .subscribe-form input {
            flex: 1;
            min-width: 180px;
            height: 44px;
            padding: 0 16px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.25);
            background: rgba(255, 255, 255, 0.08);
            color: #FFFFFF;
            font-size: 0.95rem;
            transition: border-color var(--transition), background var(--transition), box-shadow var(--transition);
            -webkit-appearance: none;
            appearance: none;
        }
        .subscribe-form input::placeholder {
            color: rgba(255, 255, 255, 0.5);
        }
        .subscribe-form input:focus {
            border-color: var(--accent);
            background: rgba(255, 255, 255, 0.12);
            box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.25);
            outline: none;
        }
        .subscribe-form .btn-primary {
            height: 44px;
            padding: 0 28px;
            border-radius: var(--radius-sm);
        }
        .subscribe-privacy {
            font-size: 0.78rem;
            color: rgba(255, 255, 255, 0.55);
        }
        .subscribe-privacy a {
            color: rgba(255, 255, 255, 0.75);
            text-decoration: underline;
        }
        .subscribe-privacy a:hover {
            color: #FFFFFF;
        }

        /* ============ FAQ ============ */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: border-color var(--transition), box-shadow var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(34, 197, 94, 0.35);
        }
        .faq-item.is-open {
            border-color: var(--accent);
            box-shadow: var(--shadow-md);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            cursor: pointer;
            border: none;
            background: transparent;
            width: 100%;
            text-align: left;
            font-size: 0.98rem;
            font-weight: 600;
            color: var(--text);
            transition: color var(--transition);
            -webkit-appearance: none;
            appearance: none;
        }
        .faq-question:hover {
            color: var(--accent-strong);
        }
        .faq-question .faq-toggle-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--bg-alt);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            color: var(--text-secondary);
            flex-shrink: 0;
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }
        .faq-item.is-open .faq-toggle-icon {
            background: var(--accent-soft);
            color: var(--accent-strong);
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-slow);
        }
        .faq-item.is-open .faq-answer {
            max-height: 400px;
        }
        .faq-answer p {
            padding: 0 22px 18px;
            font-size: 0.92rem;
            line-height: 1.7;
            color: var(--text-secondary);
            margin-bottom: 0;
        }

        /* ============ Footer ============ */
        .site-footer {
            background: var(--primary-dark);
            color: #9CA3AF;
            padding: 48px 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 36px;
            margin-bottom: 32px;
        }
        .footer-brand .footer-logo {
            font-size: 1.2rem;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 10px;
            display: block;
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.6;
            color: #9CA3AF;
            margin-bottom: 0;
            max-width: 300px;
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: #D1D5DB;
            margin-bottom: 14px;
        }
        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-col li {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .footer-col a {
            font-size: 0.88rem;
            color: #9CA3AF;
            transition: color var(--transition);
        }
        .footer-col a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.82rem;
            color: #6B7280;
        }
        .footer-bottom .copyright {
            margin-bottom: 0;
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                align-items: center;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
        }

        /* ============ Utility Classes ============ */
        .section-divider {
            height: 1px;
            background: var(--border);
            border: none;
            margin: 0;
            padding: 0;
        }
        .text-center {
            text-align: center;
        }
        .text-muted {
            color: var(--text-muted);
        }
        .mt-0 {
            margin-top: 0;
        }
        .mb-0 {
            margin-bottom: 0;
        }
        .mb-12 {
            margin-bottom: 12px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .mb-20 {
            margin-bottom: 20px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }
        .mb-32 {
            margin-bottom: 32px;
        }
        .gap-16 {
            gap: 16px;
        }
        .gap-20 {
            gap: 20px;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }
        .d-flex {
            display: flex;
        }
        .align-center {
            align-items: center;
        }
        .justify-between {
            justify-content: space-between;
        }
        .justify-center {
            justify-content: center;
        }
        .w-full {
            width: 100%;
        }

        /* ============ Responsive Section Padding ============ */
        @media (max-width: 768px) {
            section {
                padding: var(--section-pad-mobile) 0;
            }
            :root {
                --gutter: 16px;
            }
            .section-header {
                margin-bottom: 24px;
            }
            .steps-horizontal {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 520px) {
            .steps-horizontal {
                grid-template-columns: 1fr;
            }
            .metric-item {
                grid-template-columns: 1fr;
                gap: 8px;
            }
            .metric-item .metric-value {
                text-align: left;
            }
        }

        /* ============ Foundation Overrides ============ */
        .top-bar,
        .top-bar ul,
        .top-bar li {
            background: transparent;
        }
        .top-bar {
            padding: 0;
        }
        .menu > li > a {
            padding: 8px 4px;
        }
        .grid-x {
            margin-left: -10px;
            margin-right: -10px;
        }
        .grid-x > .cell {
            padding-left: 10px;
            padding-right: 10px;
        }

        /* Smooth scroll for anchor links */
        a[href^="#"] {
            scroll-margin-top: 90px;
        }

/* roulang page: article */
/* ============ CSS Design Tokens ============ */
        :root {
            --primary: #1F2937;
            --primary-dark: #111827;
            --primary-light: #374151;
            --accent: #22C55E;
            --accent-strong: #16A34A;
            --accent-soft: rgba(34, 197, 94, 0.12);
            --accent-glow: rgba(34, 197, 94, 0.22);
            --accent-2: #06B6D4;
            --accent-2-soft: rgba(6, 182, 212, 0.10);
            --bg: #F5F7FA;
            --bg-alt: #EEF1F5;
            --card: #FFFFFF;
            --text: #1F2937;
            --text-secondary: #4B5563;
            --text-muted: #6B7280;
            --border: #E5E7EB;
            --border-light: #F0F2F5;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-full: 9999px;
            --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 28px rgba(0, 0, 0, 0.12);
            --shadow-hover: 0 10px 30px rgba(0, 0, 0, 0.14);
            --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            --font-mono: "SF Mono", "Fira Code", "Cascadia Code", monospace;
            --transition: 0.2s ease;
            --transition-slow: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --nav-height: 64px;
            --container-max: 1200px;
            --gutter: 24px;
            --section-pad: 72px;
            --section-pad-mobile: 40px;
        }

        /* ============ Reset & Base ============ */
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        *, *::before, *::after {
            box-sizing: border-box;
        }
        body {
            font-family: var(--font-sans);
            font-size: 17px;
            font-weight: 400;
            line-height: 1.65;
            color: var(--text);
            background-color: var(--bg);
            overflow-x: hidden;
            -webkit-tap-highlight-color: transparent;
            margin: 0;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition), text-decoration var(--transition);
        }
        a:hover {
            color: var(--accent-strong);
            text-decoration: none;
        }
        a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
            border-radius: 4px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }
        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
            -webkit-appearance: none;
            appearance: none;
        }
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }
        section {
            padding: var(--section-pad) 0;
            position: relative;
        }
        .bg-white-section {
            background: var(--card);
        }
        .bg-alt-section {
            background: var(--bg-alt);
        }
        .bg-dark-section {
            background: var(--primary);
            color: #E5E7EB;
        }
        .bg-dark-section h2, .bg-dark-section h3 {
            color: #FFFFFF;
        }

        /* ============ Container ============ */
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: var(--gutter);
            padding-right: var(--gutter);
        }

        /* ============ Header / Navigation ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            padding: 14px var(--gutter) 0;
            transition: padding var(--transition-slow);
            pointer-events: none;
        }
        .site-header .nav-shell {
            pointer-events: auto;
            max-width: var(--container-max);
            margin: 0 auto;
            background: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid rgba(229, 231, 235, 0.6);
            padding: 0 20px;
            height: 60px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            transition: box-shadow var(--transition-slow), background var(--transition-slow), height var(--transition-slow);
        }
        .site-header.scrolled .nav-shell {
            box-shadow: var(--shadow-lg);
            background: rgba(255, 255, 255, 0.98);
            height: 56px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--text);
            white-space: nowrap;
            line-height: 1.2;
        }
        .nav-logo .logo-mark {
            width: 34px;
            height: 34px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--accent), var(--accent-2));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1rem;
            flex-shrink: 0;
        }
        .nav-menu-wrap {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 24px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-menu li a {
            display: inline-block;
            padding: 8px 12px;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: color var(--transition), background var(--transition);
            white-space: nowrap;
        }
        .nav-menu li a:hover {
            color: var(--accent-strong);
            background: var(--accent-soft);
        }
        .nav-menu li a.active {
            color: var(--accent-strong);
            background: var(--accent-soft);
        }
        .nav-hamburger {
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            gap: 5px;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: transparent;
            transition: background var(--transition);
        }
        .nav-hamburger:hover {
            background: var(--bg-alt);
        }
        .nav-hamburger span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: transform var(--transition), opacity var(--transition);
        }
        .nav-hamburger[aria-expanded="true"] span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-hamburger[aria-expanded="true"] span:nth-child(2) {
            opacity: 0;
        }
        .nav-hamburger[aria-expanded="true"] span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }
        .nav-mobile-panel {
            display: none;
            pointer-events: auto;
            max-width: var(--container-max);
            margin: 8px auto 0;
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border);
            padding: 16px 20px;
            transition: opacity var(--transition-slow), transform var(--transition-slow);
        }
        .nav-mobile-panel.open {
            display: block;
            opacity: 1;
            transform: translateY(0);
        }
        .nav-mobile-panel ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .nav-mobile-panel li a {
            display: block;
            padding: 10px 14px;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: color var(--transition), background var(--transition);
        }
        .nav-mobile-panel li a:hover,
        .nav-mobile-panel li a.active {
            color: var(--accent-strong);
            background: var(--accent-soft);
        }

        /* ============ Buttons ============ */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 22px;
            font-weight: 700;
            font-size: 0.95rem;
            border-radius: var(--radius-full);
            border: 2px solid transparent;
            transition: all var(--transition);
            white-space: nowrap;
            line-height: 1.2;
            text-align: center;
        }
        .btn:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }
        .btn-primary {
            background: var(--accent);
            color: #FFFFFF;
            border-color: var(--accent);
            box-shadow: 0 2px 8px rgba(34, 197, 94, 0.25);
        }
        .btn-primary:hover {
            background: var(--accent-strong);
            border-color: var(--accent-strong);
            color: #FFFFFF;
            box-shadow: 0 4px 16px rgba(34, 197, 94, 0.35);
            transform: translateY(-1px);
        }
        .btn-primary:active {
            transform: translateY(1px);
            box-shadow: 0 1px 4px rgba(34, 197, 94, 0.2);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #FFFFFF;
            border-color: var(--primary);
            transform: translateY(-1px);
        }
        .btn-sm {
            padding: 8px 16px;
            font-size: 0.85rem;
        }
        .btn-lg {
            padding: 14px 28px;
            font-size: 1.05rem;
        }

        /* ============ Breadcrumb ============ */
        .breadcrumb-section {
            padding: 28px 0 20px;
            background: var(--bg);
        }
        .breadcrumb-nav {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        .breadcrumb-nav a {
            color: var(--text-muted);
            transition: color var(--transition);
        }
        .breadcrumb-nav a:hover {
            color: var(--accent-strong);
        }
        .breadcrumb-nav .separator {
            color: var(--border);
            user-select: none;
        }
        .breadcrumb-nav .current {
            color: var(--text);
            font-weight: 600;
        }

        /* ============ Article Title Section ============ */
        .article-title-section {
            padding: 24px 0 32px;
            background: var(--card);
            border-bottom: 1px solid var(--border-light);
        }
        .article-title-wrap {
            max-width: 800px;
            margin: 0 auto;
        }
        .article-title-wrap h1 {
            font-size: 1.85rem;
            font-weight: 700;
            line-height: 1.35;
            color: var(--primary);
            margin: 0 0 16px;
        }
        .article-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 0.88rem;
            color: var(--text-muted);
        }
        .article-meta .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .article-meta .meta-item i {
            color: var(--accent);
            font-size: 0.8rem;
        }
        .article-meta .category-tag {
            display: inline-block;
            padding: 4px 12px;
            border-radius: var(--radius-full);
            background: var(--accent-soft);
            color: var(--accent-strong);
            font-weight: 600;
            font-size: 0.8rem;
        }

        /* ============ Article Content Section ============ */
        .article-content-section {
            padding: 40px 0 48px;
            background: var(--card);
        }
        .article-content-wrap {
            max-width: 800px;
            margin: 0 auto;
        }
        .article-body {
            font-size: 1.06rem;
            line-height: 1.75;
            color: var(--text);
        }
        .article-body p {
            margin: 0 0 1.2em;
        }
        .article-body h2 {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--primary);
            margin: 1.8em 0 0.8em;
            line-height: 1.35;
        }
        .article-body h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--primary);
            margin: 1.6em 0 0.6em;
            line-height: 1.35;
        }
        .article-body h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text);
            margin: 1.4em 0 0.5em;
        }
        .article-body ul,
        .article-body ol {
            margin: 0 0 1.2em;
            padding-left: 1.4em;
        }
        .article-body li {
            margin-bottom: 0.4em;
        }
        .article-body blockquote {
            margin: 1.2em 0;
            padding: 14px 20px;
            border-left: 4px solid var(--accent);
            background: var(--accent-soft);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-style: italic;
            color: var(--text-secondary);
            font-size: 1rem;
        }
        .article-body img {
            border-radius: var(--radius-md);
            margin: 1.2em auto;
            box-shadow: var(--shadow-md);
            max-width: 100%;
        }
        .article-body code {
            font-family: var(--font-mono);
            font-size: 0.88em;
            background: var(--bg-alt);
            padding: 2px 6px;
            border-radius: 4px;
            color: var(--primary);
        }
        .article-body pre {
            background: var(--primary-dark);
            color: #E5E7EB;
            padding: 16px 20px;
            border-radius: var(--radius-md);
            overflow-x: auto;
            margin: 1.2em 0;
            font-size: 0.9rem;
            line-height: 1.5;
        }
        .article-body pre code {
            background: transparent;
            color: inherit;
            padding: 0;
            font-size: inherit;
        }
        .article-body a {
            color: var(--accent-strong);
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-body a:hover {
            color: var(--accent);
            text-decoration: none;
        }
        .article-not-found {
            text-align: center;
            padding: 48px 20px;
            background: var(--bg-alt);
            border-radius: var(--radius-md);
            border: 1px dashed var(--border);
        }
        .article-not-found i {
            font-size: 2.4rem;
            color: var(--text-muted);
            margin-bottom: 16px;
            display: block;
        }
        .article-not-found h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .article-not-found p {
            color: var(--text-muted);
            margin-bottom: 20px;
        }

        /* ============ Share Toolbar ============ */
        .share-toolbar-section {
            padding: 28px 0;
            background: var(--bg);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }
        .share-toolbar-wrap {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
        }
        .share-toolbar-label {
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .share-toolbar-label i {
            color: var(--accent);
        }
        .share-toolbar-actions {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .share-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            border-radius: var(--radius-full);
            background: var(--card);
            border: 1px solid var(--border);
            color: var(--text-secondary);
            font-size: 1rem;
            transition: all var(--transition);
            cursor: pointer;
        }
        .share-btn:hover {
            border-color: var(--accent);
            color: var(--accent-strong);
            background: var(--accent-soft);
            transform: translateY(-1px);
            box-shadow: var(--shadow-sm);
        }
        .share-btn:active {
            transform: translateY(1px);
        }

        /* ============ Related Articles ============ */
        .related-section {
            padding: 48px 0 56px;
            background: var(--card);
        }
        .related-section .section-heading {
            max-width: 800px;
            margin: 0 auto 28px;
        }
        .related-section .section-heading h2 {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--primary);
            margin: 0;
        }
        .related-grid {
            max-width: 800px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 18px;
        }
        .related-card {
            background: var(--card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }
        .related-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
            border-color: var(--accent);
        }
        .related-card-img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            display: block;
        }
        .related-card-body {
            padding: 14px 16px 16px;
        }
        .related-card-body h3 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--primary);
            margin: 0 0 6px;
            line-height: 1.4;
        }
        .related-card-body .related-meta {
            font-size: 0.8rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .related-card-body .related-meta .tag-mini {
            padding: 2px 8px;
            border-radius: var(--radius-full);
            background: var(--accent-soft);
            color: var(--accent-strong);
            font-weight: 600;
            font-size: 0.72rem;
        }

        /* ============ Prev / Next ============ */
        .prevnext-section {
            padding: 32px 0 40px;
            background: var(--bg);
        }
        .prevnext-wrap {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }
        .prevnext-link {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 12px 18px;
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            color: var(--text-secondary);
            font-weight: 600;
            font-size: 0.9rem;
            transition: all var(--transition);
            max-width: 48%;
        }
        .prevnext-link:hover {
            border-color: var(--accent);
            color: var(--accent-strong);
            box-shadow: var(--shadow-sm);
            transform: translateY(-1px);
        }
        .prevnext-link i {
            font-size: 0.85rem;
        }
        .prevnext-link .prevnext-label {
            font-size: 0.75rem;
            font-weight: 400;
            color: var(--text-muted);
            display: block;
            margin-bottom: 2px;
        }

        /* ============ CTA Strip ============ */
        .cta-strip-section {
            padding: 40px 0 48px;
            background: var(--card);
            border-top: 1px solid var(--border-light);
        }
        .cta-strip-wrap {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
            padding: 24px 28px;
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            border-radius: var(--radius-lg);
            color: #E5E7EB;
        }
        .cta-strip-text h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: #FFFFFF;
            margin: 0 0 4px;
        }
        .cta-strip-text p {
            font-size: 0.9rem;
            color: #D1D5DB;
            margin: 0;
        }
        .cta-strip-form {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }
        .cta-strip-form input {
            width: 240px;
            height: 44px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.25);
            background: rgba(255, 255, 255, 0.1);
            color: #FFFFFF;
            padding: 0 14px;
            font-size: 0.9rem;
            transition: all var(--transition);
        }
        .cta-strip-form input::placeholder {
            color: rgba(255, 255, 255, 0.55);
        }
        .cta-strip-form input:focus {
            outline: none;
            border-color: var(--accent);
            background: rgba(255, 255, 255, 0.15);
            box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.2);
        }

        /* ============ Copyright Strip ============ */
        .copyright-strip-section {
            padding: 20px 0 24px;
            background: var(--bg);
        }
        .copyright-strip-wrap {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 0.82rem;
            color: var(--text-muted);
            text-align: center;
            flex-wrap: wrap;
        }
        .copyright-strip-wrap i {
            color: var(--accent);
            font-size: 0.7rem;
        }

        /* ============ Footer ============ */
        .site-footer {
            background: var(--primary-dark);
            color: #D1D5DB;
            padding: 56px 0 28px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 36px;
        }
        .site-footer .footer-brand .footer-logo {
            font-size: 1.15rem;
            font-weight: 700;
            color: #FFFFFF;
            display: block;
            margin-bottom: 12px;
        }
        .site-footer .footer-brand p {
            font-size: 0.88rem;
            color: #9CA3AF;
            line-height: 1.65;
            margin: 0;
        }
        .site-footer .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #FFFFFF;
            margin: 0 0 14px;
        }
        .site-footer .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .site-footer .footer-col ul li a {
            font-size: 0.88rem;
            color: #9CA3AF;
            transition: color var(--transition);
        }
        .site-footer .footer-col ul li a:hover {
            color: var(--accent);
        }
        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 22px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
        }
        .site-footer .footer-bottom .copyright {
            font-size: 0.85rem;
            color: #9CA3AF;
            margin: 0;
        }
        .site-footer .footer-bottom .text-muted {
            font-size: 0.82rem;
            color: #6B7280;
            margin: 0;
        }

        /* ============ Responsive ============ */
        @media (max-width: 1024px) {
            :root {
                --section-pad: 56px;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            :root {
                --section-pad: 44px;
                --gutter: 16px;
            }
            .site-header {
                padding: 10px var(--gutter) 0;
            }
            .site-header .nav-shell {
                padding: 0 14px;
                height: 54px;
            }
            .nav-menu {
                display: none;
            }
            .nav-hamburger {
                display: flex;
            }
            .nav-mobile-panel {
                display: none;
            }
            .nav-mobile-panel.open {
                display: block;
            }
            .article-title-wrap h1 {
                font-size: 1.5rem;
            }
            .article-body {
                font-size: 1rem;
                line-height: 1.7;
            }
            .share-toolbar-wrap {
                flex-direction: column;
                align-items: flex-start;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .cta-strip-wrap {
                flex-direction: column;
                align-items: flex-start;
                padding: 20px;
            }
            .cta-strip-form input {
                width: 100%;
            }
            .prevnext-wrap {
                flex-direction: column;
            }
            .prevnext-link {
                max-width: 100%;
                width: 100%;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
        }
        @media (max-width: 520px) {
            :root {
                --section-pad: 32px;
                --gutter: 12px;
            }
            .site-header {
                padding: 8px var(--gutter) 0;
            }
            .site-header .nav-shell {
                padding: 0 12px;
                height: 50px;
                border-radius: var(--radius-sm);
            }
            .nav-logo {
                font-size: 0.92rem;
                gap: 7px;
            }
            .nav-logo .logo-mark {
                width: 30px;
                height: 30px;
                font-size: 0.85rem;
            }
            .article-title-wrap h1 {
                font-size: 1.3rem;
            }
            .article-meta {
                gap: 10px;
                font-size: 0.8rem;
            }
            .article-body {
                font-size: 0.95rem;
                line-height: 1.68;
            }
            .article-body h2 {
                font-size: 1.2rem;
            }
            .article-body h3 {
                font-size: 1.05rem;
            }
            .share-toolbar-actions {
                flex-wrap: wrap;
            }
            .site-footer {
                padding: 36px 0 20px;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
                align-items: center;
            }
            .cta-strip-form {
                width: 100%;
            }
            .cta-strip-form input {
                width: 100%;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #1F2937;
            --primary-dark: #111827;
            --primary-light: #374151;
            --accent: #22C55E;
            --accent-strong: #16A34A;
            --accent-soft: rgba(34, 197, 94, 0.12);
            --accent-glow: rgba(34, 197, 94, 0.22);
            --accent-2: #06B6D4;
            --accent-2-soft: rgba(6, 182, 212, 0.10);
            --bg: #F5F7FA;
            --bg-alt: #EEF1F5;
            --card: #FFFFFF;
            --text: #1F2937;
            --text-secondary: #4B5563;
            --text-muted: #6B7280;
            --border: #E5E7EB;
            --border-light: #F0F2F5;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-full: 9999px;
            --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 28px rgba(0, 0, 0, 0.12);
            --shadow-hover: 0 10px 30px rgba(0, 0, 0, 0.14);
            --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            --font-mono: "SF Mono", "Fira Code", "Cascadia Code", monospace;
            --transition: 0.2s ease;
            --transition-slow: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --nav-height: 64px;
            --container-max: 1200px;
            --gutter: 24px;
            --section-pad: 72px;
            --section-pad-mobile: 40px;
        }

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

        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: 17px;
            font-weight: 400;
            line-height: 1.65;
            color: var(--text);
            background-color: var(--bg);
            overflow-x: hidden;
            -webkit-tap-highlight-color: transparent;
            margin: 0;
        }

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

        a:hover {
            color: var(--accent-strong);
            text-decoration: none;
        }

        a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
            border-radius: 4px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
            -webkit-appearance: none;
            appearance: none;
        }

        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        section {
            padding: var(--section-pad) 0;
            position: relative;
        }

        .bg-white-section {
            background: var(--card);
        }

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

        .bg-dark-section {
            background: var(--primary);
            color: #E5E7EB;
        }

        .bg-dark-section h2,
        .bg-dark-section h3,
        .bg-dark-section p {
            color: #FFFFFF;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: var(--gutter);
            padding-right: var(--gutter);
        }

        /* Header / Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            padding: 14px var(--gutter) 0;
            transition: padding var(--transition-slow);
            pointer-events: none;
        }

        .site-header .nav-shell {
            pointer-events: auto;
            max-width: var(--container-max);
            margin: 0 auto;
            background: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid rgba(229, 231, 235, 0.6);
            padding: 0 20px;
            height: 60px;
            display: flex;
            align-items: center;
            transition: box-shadow var(--transition-slow), background var(--transition-slow), height var(--transition-slow);
        }

        .site-header.scrolled .nav-shell {
            box-shadow: var(--shadow-lg);
            background: rgba(255, 255, 255, 0.98);
            height: 56px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--text);
            white-space: nowrap;
            line-height: 1.2;
        }

        .nav-logo .logo-mark {
            width: 34px;
            height: 34px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--accent), var(--accent-2));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
            flex-shrink: 0;
        }

        .nav-menu-wrap {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-left: auto;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            list-style: none;
            margin: 0;
            padding: 0;
            gap: 24px;
        }

        .nav-menu a {
            display: inline-block;
            padding: 8px 4px;
            font-weight: 500;
            color: var(--text-secondary);
            position: relative;
            white-space: nowrap;
        }

        .nav-menu a::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            transition: width var(--transition);
        }

        .nav-menu a:hover {
            color: var(--text);
        }

        .nav-menu a:hover::after {
            width: 100%;
        }

        .nav-menu a.active {
            color: var(--accent-strong);
            font-weight: 700;
        }

        .nav-menu a.active::after {
            width: 100%;
        }

        .nav-hamburger {
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: var(--bg-alt);
            transition: background var(--transition);
        }

        .nav-hamburger span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--text);
            margin: 2px 0;
            transition: transform var(--transition), opacity var(--transition);
        }

        .nav-hamburger:hover {
            background: var(--border);
        }

        .nav-mobile-panel {
            display: none;
            margin: 8px auto 0;
            max-width: var(--container-max);
            background: #fff;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border);
            padding: 12px 16px;
            pointer-events: auto;
        }

        .nav-mobile-panel ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .nav-mobile-panel a {
            display: block;
            padding: 10px 12px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            color: var(--text-secondary);
        }

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

        /* Category Hero Plain */
        .category-hero-plain {
            padding: 28px 0 20px;
            background: var(--bg);
        }

        .breadcrumb {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 16px;
        }

        .breadcrumb a {
            color: var(--text-muted);
        }

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

        .breadcrumb .separator {
            margin: 0 6px;
            color: var(--border);
        }

        .category-heading {
            display: flex;
            flex-direction: column;
            gap: 8px;
            max-width: 780px;
        }

        .eyebrow {
            display: inline-block;
            font-size: 0.85rem;
            font-weight: 700;
            letter-spacing: 0.03em;
            color: var(--accent-strong);
            background: var(--accent-soft);
            padding: 4px 10px;
            border-radius: var(--radius-full);
            width: fit-content;
        }

        .category-heading h1 {
            font-size: 2.3rem;
            font-weight: 700;
            line-height: 1.25;
            margin: 0;
        }

        .category-heading p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            margin: 0;
        }

        .category-entry-strip {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 18px;
        }

        .entry-pill {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border-radius: var(--radius-full);
            background: #fff;
            border: 1px solid var(--border);
            color: var(--text-secondary);
            font-size: 0.9rem;
            font-weight: 500;
            transition: border-color var(--transition), color var(--transition), box-shadow var(--transition);
        }

        .entry-pill:hover {
            border-color: var(--accent);
            color: var(--accent-strong);
            box-shadow: var(--shadow-sm);
        }

        /* Guide Intro */
        .guide-intro {
            background: var(--bg-alt);
        }

        .guide-intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: center;
        }

        .guide-intro-content h2 {
            font-size: 1.7rem;
            font-weight: 700;
            margin: 0 0 12px;
        }

        .guide-intro-content p {
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.75;
        }

        .guide-intro-visual {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            min-height: 260px;
            background: var(--primary);
        }

        .guide-intro-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 260px;
        }

        /* Cards Grid */
        .guide-cards-section {
            background: var(--card);
        }

        .section-header {
            max-width: 700px;
            margin-bottom: 32px;
        }

        .section-header .section-title {
            font-size: 1.7rem;
            font-weight: 700;
            margin: 0 0 8px;
        }

        .section-header .section-sub {
            color: var(--text-muted);
            margin: 0;
        }

        .guide-card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .guide-card {
            display: flex;
            flex-direction: column;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
        }

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

        .guide-card .card-img {
            height: 170px;
            overflow: hidden;
            background: var(--bg-alt);
        }

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

        .guide-card:hover .card-img img {
            transform: scale(1.04);
        }

        .guide-card .card-body {
            padding: 18px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            flex: 1;
        }

        .guide-card .tag {
            width: fit-content;
            background: var(--accent-soft);
            color: var(--accent-strong);
            font-size: 0.75rem;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: var(--radius-full);
            letter-spacing: 0.02em;
        }

        .guide-card .card-title {
            font-size: 1.05rem;
            font-weight: 700;
            line-height: 1.45;
            margin: 0;
        }

        .guide-card .card-desc {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.65;
            margin: 0;
        }

        /* Filter Toolbar */
        .filter-toolbar-section {
            background: var(--bg);
            padding: 28px 0 32px;
        }

        .filter-toolbar {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 12px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 12px 16px;
            box-shadow: var(--shadow-sm);
        }

        .filter-pills {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .filter-pill {
            padding: 7px 14px;
            border-radius: var(--radius-full);
            background: var(--bg-alt);
            color: var(--text-secondary);
            font-size: 0.9rem;
            font-weight: 500;
            transition: background var(--transition), color var(--transition);
            border: 1px solid transparent;
        }

        .filter-pill.active,
        .filter-pill:hover {
            background: var(--accent);
            color: #fff;
        }

        .sort-select-wrap {
            margin-left: auto;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .sort-select-wrap label {
            color: var(--text-muted);
            font-size: 0.9rem;
            white-space: nowrap;
        }

        .sort-select {
            height: 38px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            background: #fff;
            color: var(--text);
            padding: 0 10px;
            min-width: 140px;
        }

        /* Featured Spotlight */
        .feature-spotlight {
            background: var(--primary);
            color: #E5E7EB;
        }

        .feature-card {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 24px;
            align-items: center;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius-lg);
            overflow: hidden;
            padding: 28px;
            box-shadow: var(--shadow-lg);
        }

        .feature-card-content h2 {
            font-size: 1.6rem;
            font-weight: 700;
            margin: 0 0 12px;
            color: #fff;
        }

        .feature-card-content p {
            color: #D1D5DB;
            margin: 0 0 18px;
        }

        .feature-card-visual img {
            border-radius: var(--radius-md);
            min-height: 220px;
            object-fit: cover;
            width: 100%;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.95rem;
            transition: transform var(--transition), background var(--transition), color var(--transition), box-shadow var(--transition);
            white-space: nowrap;
        }

        .btn:active {
            transform: translateY(1px);
        }

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

        .btn-primary:hover {
            background: var(--accent-strong);
            color: #fff;
            box-shadow: 0 6px 14px rgba(34, 197, 94, 0.3);
        }

        .btn-secondary {
            background: transparent;
            color: var(--primary);
            border: 1px solid var(--primary);
        }

        .btn-secondary:hover {
            background: var(--bg-alt);
            color: var(--primary);
        }

        .btn-ghost {
            background: transparent;
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.5);
        }

        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
        }

        /* Stats */
        .stats-section {
            background: var(--bg-alt);
        }

        .stats-row {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .stat-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 24px 20px;
            text-align: center;
            box-shadow: var(--shadow-sm);
        }

        .stat-number {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--accent-strong);
            line-height: 1.2;
        }

        .stat-label {
            color: var(--text-secondary);
            font-size: 0.95rem;
            margin-top: 6px;
        }

        /* FAQ */
        .faq-section {
            background: var(--card);
        }

        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            background: #fff;
            overflow: hidden;
            transition: border-color var(--transition), box-shadow var(--transition);
        }

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

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 16px 20px;
            font-weight: 700;
            font-size: 1rem;
            color: var(--text);
            text-align: left;
            transition: color var(--transition);
        }

        .faq-question:hover {
            color: var(--accent-strong);
        }

        .faq-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--accent-soft);
            color: var(--accent-strong);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            transition: transform var(--transition);
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
        }

        .faq-answer {
            display: none;
            padding: 0 20px 18px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

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

        /* CTA Strip */
        .cta-strip {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: #fff;
        }

        .cta-strip .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
        }

        .cta-strip h2 {
            font-size: 1.6rem;
            font-weight: 700;
            margin: 0 0 8px;
        }

        .cta-strip p {
            color: #D1D5DB;
            margin: 0;
        }

        .cta-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        /* Footer */
        .site-footer {
            background: var(--primary-dark);
            color: #E5E7EB;
            padding: 48px 0 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }

        .footer-brand .footer-logo {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            display: block;
            margin-bottom: 12px;
        }

        .footer-brand p {
            color: #9CA3AF;
            font-size: 0.95rem;
            line-height: 1.7;
            margin: 0;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 700;
            margin: 0 0 12px;
            letter-spacing: 0.02em;
        }

        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col a {
            color: #9CA3AF;
            font-size: 0.95rem;
        }

        .footer-col a:hover {
            color: var(--accent);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 8px;
        }

        .footer-bottom .copyright {
            color: #D1D5DB;
            font-size: 0.85rem;
            margin: 0;
        }

        .footer-bottom .text-muted {
            color: #9CA3AF;
            font-size: 0.85rem;
            margin: 0;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .guide-card-grid {
                grid-template-columns: repeat(2, 1fr);
            }

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

            .guide-intro-grid {
                grid-template-columns: 1fr;
            }

            .feature-card {
                grid-template-columns: 1fr;
            }

            .feature-card-visual {
                order: -1;
            }

            .section-title {
                font-size: 1.5rem;
            }

            .category-heading h1 {
                font-size: 2rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --gutter: 16px;
                --section-pad: 48px;
                --section-pad-mobile: 32px;
            }

            section {
                padding: var(--section-pad-mobile) 0;
            }

            .nav-menu {
                display: none;
            }

            .nav-hamburger {
                display: flex;
            }

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

            .site-header {
                padding: 8px var(--gutter) 0;
            }

            .site-header .nav-shell {
                height: 52px;
                padding: 0 14px;
            }

            .site-header.scrolled .nav-shell {
                height: 48px;
            }

            .nav-logo {
                font-size: 0.95rem;
            }

            .nav-logo .logo-mark {
                width: 28px;
                height: 28px;
                font-size: 14px;
            }

            .guide-card-grid {
                grid-template-columns: 1fr;
            }

            .stats-row {
                grid-template-columns: 1fr 1fr;
            }

            .feature-card {
                padding: 20px;
            }

            .category-heading h1 {
                font-size: 1.8rem;
            }

            .category-hero-plain {
                padding: 20px 0 12px;
            }

            .filter-toolbar {
                flex-direction: column;
                align-items: stretch;
            }

            .sort-select-wrap {
                margin-left: 0;
                justify-content: space-between;
            }

            .cta-strip .container {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 520px) {
            body {
                font-size: 16px;
            }

            .category-heading h1 {
                font-size: 1.6rem;
            }

            .section-title {
                font-size: 1.35rem;
            }

            .guide-intro-content h2 {
                font-size: 1.4rem;
            }

            .stats-row {
                grid-template-columns: 1fr;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }

            .btn {
                padding: 10px 18px;
                font-size: 0.9rem;
            }
        }