/* roulang page: index */
:root {
            --primary: #1e6f8c;
            --primary-dark: #155a70;
            --secondary: #2c3e50;
            --accent: #10b981;
            --accent-hover: #0d9969;
            --bg: #f8fafb;
            --surface: #ffffff;
            --text: #1e293b;
            --text-light: #64748b;
            --border: #e2e8f0;
            --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
            --shadow: 0 4px 12px rgba(0,0,0,0.07);
            --shadow-lg: 0 12px 24px rgba(0,0,0,0.1);
            --radius: 12px;
            --radius-sm: 8px;
            --transition: 0.2s ease;
        }
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        body { font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; background: var(--bg); color: var(--text); line-height: 1.6; -webkit-font-smoothing: antialiased; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
        a { text-decoration: none; color: var(--primary); transition: var(--transition); }
        a:hover { color: var(--primary-dark); }
        img { max-width: 100%; height: auto; display: block; }

        /* Header / Navigation */
        .site-header { background: var(--surface); border-bottom: 1px solid var(--border); box-shadow: var(--shadow-sm); position: sticky; top: 0; z-index: 100; }
        .header-inner { display: flex; align-items: center; justify-content: space-between; height: 70px; }
        .logo { font-size: 1.6rem; font-weight: 700; color: var(--secondary); letter-spacing: -0.5px; }
        .logo span { color: var(--primary); }
        .nav-menu { display: flex; align-items: center; gap: 2rem; list-style: none; }
        .nav-menu a { font-size: 0.95rem; font-weight: 500; color: var(--text-light); padding: 0.5rem 0; border-bottom: 2px solid transparent; transition: var(--transition); }
        .nav-menu a:hover, .nav-menu a.active { color: var(--primary); border-bottom-color: var(--primary); }
        .mobile-toggle { display: none; background: none; border: none; font-size: 1.5rem; color: var(--secondary); cursor: pointer; }
        @media (max-width: 768px) {
            .nav-menu { display: none; position: absolute; top: 70px; left: 0; right: 0; background: var(--surface); flex-direction: column; padding: 1.5rem; gap: 1.2rem; border-bottom: 1px solid var(--border); box-shadow: var(--shadow); }
            .nav-menu.open { display: flex; }
            .mobile-toggle { display: block; }
        }

        /* Hero */
        .hero { background: linear-gradient(135deg, #0b2b3b 0%, #1a4c5f 100%), url('/assets/images/backpic/back-1.png') center/cover no-repeat; background-blend-mode: overlay; padding: 100px 0 90px; text-align: center; color: #fff; position: relative; }
        .hero h1 { font-size: 2.8rem; font-weight: 700; margin-bottom: 1rem; letter-spacing: -0.5px; line-height: 1.2; }
        .hero p { font-size: 1.2rem; opacity: 0.9; max-width: 680px; margin: 0 auto 2rem; }
        .btn { display: inline-block; padding: 14px 32px; border-radius: 40px; font-weight: 600; font-size: 1rem; border: none; cursor: pointer; transition: var(--transition); text-align: center; }
        .btn-primary { background: var(--accent); color: #fff; }
        .btn-primary:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: var(--shadow); color: #fff; }
        .btn-outline { background: transparent; border: 2px solid rgba(255,255,255,0.8); color: #fff; }
        .btn-outline:hover { background: rgba(255,255,255,0.15); border-color: #fff; }
        .hero .btn-group { display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap; }

        @media (max-width: 768px) {
            .hero h1 { font-size: 2rem; }
            .hero p { font-size: 1rem; }
            .btn { padding: 12px 24px; }
        }

        /* Sections */
        section { padding: 80px 0; }
        .section-title { text-align: center; margin-bottom: 50px; }
        .section-title h2 { font-size: 2rem; font-weight: 700; color: var(--secondary); margin-bottom: 0.5rem; }
        .section-title p { font-size: 1.1rem; color: var(--text-light); max-width: 640px; margin: 0 auto; }

        /* Features Cards */
        .features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
        .feature-card { background: var(--surface); border-radius: var(--radius); padding: 2rem; box-shadow: var(--shadow); transition: var(--transition); text-align: center; border: 1px solid var(--border); }
        .feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
        .feature-icon { width: 70px; height: 70px; background: rgba(30,111,140,0.1); border-radius: 18px; display: flex; align-items: center; justify-content: center; margin: 0 auto 1.5rem; color: var(--primary); font-size: 2rem; }
        .feature-card h3 { font-size: 1.3rem; margin-bottom: 0.8rem; color: var(--secondary); }
        .feature-card p { color: var(--text-light); line-height: 1.5; }

        @media (max-width: 768px) {
            .features-grid { grid-template-columns: 1fr; }
        }

        /* Stats / Data Dashboard */
        .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 25px; text-align: center; }
        .stat-card { background: var(--surface); border-radius: var(--radius); padding: 2rem 1rem; box-shadow: var(--shadow); border: 1px solid var(--border); }
        .stat-number { font-size: 2.4rem; font-weight: 700; color: var(--primary); margin-bottom: 0.3rem; }
        .stat-label { color: var(--text-light); font-size: 0.95rem; }
        @media (max-width: 768px) {
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
        }

        /* Content List (CMS items) */
        .cms-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 25px; }
        .cms-item { background: var(--surface); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); border: 1px solid var(--border); display: flex; transition: var(--transition); }
        .cms-item:hover { box-shadow: var(--shadow); transform: translateY(-3px); }
        .cms-item-icon { width: 70px; min-width: 70px; background: rgba(30,111,140,0.08); display: flex; align-items: center; justify-content: center; font-size: 1.6rem; color: var(--primary); }
        .cms-item-content { padding: 1.2rem; flex: 1; }
        .cms-item-category { display: inline-block; background: var(--accent); color: #fff; font-size: 0.75rem; padding: 3px 10px; border-radius: 20px; margin-bottom: 0.5rem; }
        .cms-item-title { font-size: 1.1rem; font-weight: 600; margin-bottom: 0.4rem; }
        .cms-item-title a { color: var(--secondary); }
        .cms-item-title a:hover { color: var(--primary); }
        .cms-item-desc { font-size: 0.9rem; color: var(--text-light); margin-bottom: 0.6rem; }
        .cms-item-date { font-size: 0.8rem; color: var(--text-light); }

        /* Category Entrance */
        .category-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 25px; }
        .category-entry { position: relative; border-radius: var(--radius); overflow: hidden; min-height: 220px; display: flex; align-items: flex-end; padding: 2rem; background-size: cover; background-position: center; color: #fff; }
        .category-entry::after { content: ''; position: absolute; inset: 0; background: linear-gradient(0deg, rgba(0,0,0,0.7) 0%, transparent 60%); }
        .category-entry-content { position: relative; z-index: 2; }
        .category-entry h3 { font-size: 1.6rem; margin-bottom: 0.5rem; }
        .category-entry p { opacity: 0.85; }
        @media (max-width: 768px) {
            .category-grid { grid-template-columns: 1fr; }
        }

        /* FAQ */
        .faq-list { max-width: 800px; margin: 0 auto; }
        details.faq-item { background: var(--surface); border-radius: var(--radius-sm); padding: 1.2rem 1.5rem; margin-bottom: 1rem; border: 1px solid var(--border); transition: var(--transition); }
        details.faq-item[open] { box-shadow: var(--shadow); }
        summary { font-weight: 600; cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; }
        summary::-webkit-details-marker { display: none; }
        summary::after { content: '\f078'; font-family: 'Font Awesome 6 Free'; font-weight: 900; color: var(--primary); transition: transform 0.2s; }
        details[open] summary::after { transform: rotate(180deg); }
        .faq-answer { padding-top: 0.8rem; color: var(--text-light); line-height: 1.5; }

        /* CTA */
        .cta { background: var(--secondary); color: #fff; text-align: center; }
        .cta h2 { font-size: 2rem; margin-bottom: 1rem; }
        .cta p { font-size: 1.1rem; opacity: 0.9; margin-bottom: 2rem; }
        .cta .btn-primary { background: var(--accent); }

        /* Footer */
        .site-footer { background: var(--surface); border-top: 1px solid var(--border); padding: 2rem 0; text-align: center; color: var(--text-light); font-size: 0.9rem; }
        .footer-brand { font-weight: 700; color: var(--secondary); margin-bottom: 0.5rem; }
        .footer-links { display: flex; justify-content: center; gap: 2rem; list-style: none; flex-wrap: wrap; margin-top: 1rem; }
        .footer-links a { color: var(--text-light); }
        .footer-links a:hover { color: var(--primary); }

        .empty-state { text-align: center; padding: 3rem; color: var(--text-light); font-size: 1.1rem; }

/* roulang page: article */
:root {
            --primary: #1e2a3a;
            --primary-light: #2a3a4e;
            --accent: #2c7a7b;
            --accent-light: #319795;
            --bg: #f4f6f9;
            --card-bg: #ffffff;
            --text: #1a202c;
            --text-soft: #4a5568;
            --text-muted: #718096;
            --border: #e2e8f0;
            --border-light: #edf2f7;
            --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
            --shadow: 0 4px 6px rgba(0,0,0,0.05), 0 2px 4px rgba(0,0,0,0.03);
            --shadow-md: 0 10px 15px rgba(0,0,0,0.06), 0 4px 6px rgba(0,0,0,0.04);
            --radius: 12px;
            --radius-sm: 8px;
            --radius-xs: 4px;
            --transition: 0.2s ease;
            --max-width: 1200px;
            --nav-height: 70px;
        }
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", system-ui, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }
        a { color: inherit; text-decoration: none; }
        img { max-width: 100%; height: auto; display: block; }
        button, input { font-family: inherit; }

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

        /* Header & Navigation */
        .site-header {
            background: var(--card-bg);
            border-bottom: 1px solid var(--border-light);
            position: sticky;
            top: 0;
            z-index: 100;
            height: var(--nav-height);
            box-shadow: var(--shadow-sm);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo a {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .logo a span {
            color: var(--accent);
            font-weight: 800;
        }
        .nav-menu {
            display: flex;
            list-style: none;
            gap: 32px;
            align-items: center;
        }
        .nav-menu a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-soft);
            padding: 8px 0;
            position: relative;
            transition: color var(--transition);
        }
        .nav-menu a:hover,
        .nav-menu a.active {
            color: var(--accent);
        }
        .nav-menu a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
            color: var(--primary);
        }
        .mobile-toggle .bar {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--primary);
            margin: 5px 0;
            transition: var(--transition);
            border-radius: 1px;
        }
        /* Article Main */
        .article-main {
            padding: 60px 0 80px;
        }
        .article-layout {
            display: flex;
            gap: 48px;
        }
        .article-primary {
            flex: 1;
            min-width: 0;
        }
        .article-sidebar {
            width: 320px;
            flex-shrink: 0;
        }
        .article-card {
            background: var(--card-bg);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            border: 1px solid var(--border-light);
        }
        .article-feature-img {
            width: 100%;
            aspect-ratio: 16/7;
            object-fit: cover;
            background: #e2e8f0;
        }
        .article-body {
            padding: 32px 36px 40px;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
            margin-bottom: 20px;
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        .article-category {
            background: #e6f0f0;
            color: var(--accent);
            padding: 4px 12px;
            border-radius: 20px;
            font-weight: 600;
            font-size: 0.8rem;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .article-date {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .article-body h1 {
            font-size: 2rem;
            font-weight: 800;
            line-height: 1.3;
            color: var(--primary);
            margin-bottom: 24px;
        }
        .article-content {
            font-size: 1.05rem;
            line-height: 1.8;
            color: var(--text);
        }
        .article-content p {
            margin-bottom: 1.4em;
            color: var(--text-soft);
        }
        .article-content h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary);
            margin: 2em 0 0.8em;
            padding-bottom: 0.3em;
            border-bottom: 2px solid var(--border);
        }
        .article-content h3 {
            font-size: 1.25rem;
            margin: 1.6em 0 0.6em;
            color: var(--primary);
        }
        .article-content ul, .article-content ol {
            margin: 1em 0;
            padding-left: 1.5em;
        }
        .article-content li {
            margin-bottom: 0.5em;
        }
        .article-content img {
            border-radius: var(--radius-sm);
            margin: 2em 0;
        }
        /* Not Found */
        .not-found {
            text-align: center;
            padding: 80px 20px;
            background: var(--card-bg);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
        }
        .not-found h1 {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 16px;
        }
        .not-found p {
            color: var(--text-soft);
            margin-bottom: 32px;
            font-size: 1.1rem;
        }
        .btn-primary {
            display: inline-block;
            background: var(--accent);
            color: #fff;
            padding: 12px 28px;
            border-radius: 30px;
            font-weight: 600;
            transition: background var(--transition), transform var(--transition);
            border: none;
            cursor: pointer;
            font-size: 1rem;
        }
        .btn-primary:hover {
            background: var(--accent-light);
            transform: translateY(-1px);
        }
        /* Sidebar */
        .sidebar-card {
            background: var(--card-bg);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 24px;
            border: 1px solid var(--border-light);
            margin-bottom: 32px;
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 20px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--border);
        }
        .sidebar-list {
            list-style: none;
        }
        .sidebar-list li {
            padding: 10px 0;
            border-bottom: 1px solid var(--border-light);
        }
        .sidebar-list li:last-child { border-bottom: none; }
        .sidebar-list a {
            font-size: 0.95rem;
            color: var(--text-soft);
            transition: color var(--transition);
        }
        .sidebar-list a:hover { color: var(--accent); }
        /* CTA */
        .cta-section {
            background: var(--primary);
            color: #fff;
            padding: 60px 0;
            margin-top: 80px;
        }
        .cta-grid {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 32px;
        }
        .cta-text h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .cta-text p {
            opacity: 0.9;
            font-size: 1.05rem;
        }
        .btn-outline {
            background: transparent;
            border: 2px solid rgba(255,255,255,0.5);
            color: #fff;
            padding: 12px 28px;
            border-radius: 30px;
            font-weight: 600;
            transition: all var(--transition);
            font-size: 1rem;
        }
        .btn-outline:hover {
            background: rgba(255,255,255,0.12);
            border-color: #fff;
        }
        /* Footer */
        .site-footer {
            background: var(--primary-light);
            color: #cbd5e0;
            padding: 48px 0 32px;
            text-align: center;
        }
        .footer-brand {
            font-size: 1.4rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }
        .site-footer p {
            font-size: 0.9rem;
            margin-bottom: 16px;
            color: #a0aec0;
        }
        .footer-links {
            display: flex;
            justify-content: center;
            list-style: none;
            gap: 28px;
            flex-wrap: wrap;
        }
        .footer-links a {
            color: #cbd5e0;
            transition: color var(--transition);
        }
        .footer-links a:hover { color: #fff; }

        /* Responsive */
        @media (max-width: 1024px) {
            .article-layout { flex-direction: column; }
            .article-sidebar { width: 100%; }
            .article-body { padding: 24px; }
        }
        @media (max-width: 768px) {
            .nav-menu {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                padding: 24px;
                gap: 20px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-md);
                transform: translateY(-100%);
                opacity: 0;
                transition: all var(--transition);
                pointer-events: none;
            }
            .nav-menu.active {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .mobile-toggle { display: block; }
            .article-body h1 { font-size: 1.6rem; }
            .cta-grid { flex-direction: column; text-align: center; }
        }

/* roulang page: category1 */
:root {
            --primary: #1a5f6b;
            --primary-light: #2d8a9e;
            --primary-soft: #e8f4f6;
            --accent: #0d9488;
            --accent-light: #ccfbf1;
            --bg: #f5f7f8;
            --card-bg: #ffffff;
            --text: #1e293b;
            --text-strong: #0f172a;
            --text-muted: #64748b;
            --text-weak: #94a3b8;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --kpi-color: #0f766e;
            --kpi-accent: #0891b2;
            --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.08);
            --radius-sm: 6px;
            --radius: 10px;
            --radius-lg: 14px;
            --radius-xl: 18px;
            --transition-fast: 0.15s ease;
            --transition: 0.25s ease;
            --transition-slow: 0.35s ease;
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --font-mono: 'SF Mono', 'JetBrains Mono', 'Consolas', 'Monaco', monospace;
            --max-width: 1200px;
            --nav-height: 68px;
        }

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

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

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background-color: var(--bg);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

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

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

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

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        ul,
        ol {
            list-style: none;
        }

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

        /* ========== HEADER & NAV ========== */
        .site-header {
            background: #ffffff;
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1000;
            height: var(--nav-height);
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition);
        }

        .site-header.scrolled {
            box-shadow: var(--shadow-md);
        }

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

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

        .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 700;
            font-size: 16px;
            letter-spacing: -0.5px;
        }

        .logo-text {
            font-weight: 700;
            font-size: 1.2rem;
            color: var(--text-strong);
            letter-spacing: -0.3px;
            white-space: nowrap;
        }

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

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

        .nav-menu li a {
            display: inline-flex;
            align-items: center;
            padding: 9px 18px;
            border-radius: 20px;
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-muted);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .nav-menu li a:hover {
            color: var(--primary);
            background: var(--primary-soft);
        }

        .nav-menu li a.active {
            color: #ffffff;
            background: var(--primary);
            font-weight: 600;
        }

        .nav-cta {
            margin-left: 8px;
        }

        .nav-cta a {
            padding: 9px 20px;
            border-radius: 20px;
            font-weight: 600;
            font-size: 0.9rem;
            color: #ffffff;
            background: var(--accent);
            transition: all var(--transition-fast);
        }

        .nav-cta a:hover {
            background: #0f766e;
            box-shadow: 0 2px 8px rgba(13, 148, 136, 0.3);
            transform: translateY(-1px);
        }

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

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

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

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

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

        /* ========== PAGE BANNER ========== */
        .page-banner {
            position: relative;
            padding: 70px 0;
            background: linear-gradient(170deg, #e8f4f6 0%, #f0f9f8 40%, #f5f7f8 100%);
            border-bottom: 1px solid var(--border);
            overflow: hidden;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -80px;
            width: 340px;
            height: 340px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(26, 95, 107, 0.06) 0%, transparent 70%);
            pointer-events: none;
        }

        .page-banner::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -60px;
            width: 240px;
            height: 240px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(13, 148, 136, 0.05) 0%, transparent 70%);
            pointer-events: none;
        }

        .banner-inner {
            position: relative;
            z-index: 1;
            display: flex;
            align-items: center;
            gap: 40px;
        }

        .banner-content {
            flex: 1;
        }

        .banner-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            background: #ffffff;
            border: 1px solid var(--border);
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--primary);
            margin-bottom: 16px;
        }

        .banner-badge .dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent);
        }

        .banner-title {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--text-strong);
            letter-spacing: -0.8px;
            line-height: 1.2;
            margin-bottom: 12px;
        }

        .banner-title span {
            color: var(--primary);
        }

        .banner-desc {
            font-size: 1.1rem;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 540px;
            margin-bottom: 20px;
        }

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

        .banner-stat-item {
            text-align: center;
            padding: 12px 20px;
            background: #ffffff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            min-width: 90px;
        }

        .banner-stat-num {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--kpi-color);
            font-family: var(--font-mono);
            letter-spacing: -0.5px;
            line-height: 1;
        }

        .banner-stat-label {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        .banner-visual {
            flex-shrink: 0;
            width: 300px;
            height: 280px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border);
            background: #fff;
        }

        .banner-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* ========== BREADCRUMB ========== */
        .breadcrumb-row {
            padding: 14px 0;
            border-bottom: 1px solid var(--border-light);
            background: #fff;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

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

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

        .breadcrumb .sep {
            color: var(--text-weak);
            font-size: 0.7rem;
        }

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

        /* ========== SECTION TITLES ========== */
        .section-header {
            text-align: center;
            margin-bottom: 40px;
        }

        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            color: var(--primary);
            margin-bottom: 8px;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-strong);
            letter-spacing: -0.5px;
            margin-bottom: 8px;
        }

        .section-subtitle {
            font-size: 1rem;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto;
        }

        /* ========== CATEGORY OVERVIEW ========== */
        .section-overview {
            padding: 60px 0 40px;
        }

        .overview-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 20px;
        }

        .overview-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 24px 22px;
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }

        .overview-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 40px;
            background: var(--primary);
            border-radius: 0 0 4px 0;
            opacity: 0;
            transition: opacity var(--transition);
        }

        .overview-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
            transform: translateY(-3px);
        }

        .overview-card:hover::before {
            opacity: 1;
        }

        .overview-card-icon {
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            background: var(--primary-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--primary);
            margin-bottom: 14px;
        }

        .overview-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-strong);
            margin-bottom: 6px;
        }

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

        /* ========== ANALYSIS DIMENSIONS ========== */
        .section-dimensions {
            padding: 50px 0;
        }

        .dimensions-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .dimension-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all var(--transition);
        }

        .dimension-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
        }

        .dimension-card-img {
            height: 180px;
            overflow: hidden;
            position: relative;
        }

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

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

        .dimension-card-body {
            padding: 20px;
        }

        .dimension-card-tag {
            display: inline-block;
            padding: 4px 10px;
            font-size: 0.75rem;
            font-weight: 600;
            border-radius: 12px;
            background: var(--accent-light);
            color: var(--accent);
            margin-bottom: 8px;
        }

        .dimension-card-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-strong);
            margin-bottom: 6px;
        }

        .dimension-card-body p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        .dimension-card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 12px;
            padding-top: 12px;
            border-top: 1px solid var(--border-light);
            font-size: 0.8rem;
            color: var(--text-weak);
        }

        /* ========== KPI DASHBOARD ========== */
        .section-kpi {
            padding: 50px 0;
            background: #ffffff;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .kpi-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .kpi-card {
            text-align: center;
            padding: 28px 16px;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            transition: all var(--transition);
        }

        .kpi-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
        }

        .kpi-icon {
            font-size: 1.6rem;
            margin-bottom: 8px;
        }

        .kpi-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--kpi-color);
            font-family: var(--font-mono);
            letter-spacing: -1px;
            line-height: 1.1;
        }

        .kpi-number.accent {
            color: var(--kpi-accent);
        }

        .kpi-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 6px;
            font-weight: 500;
        }

        .kpi-change {
            display: inline-flex;
            align-items: center;
            gap: 3px;
            font-size: 0.8rem;
            font-weight: 600;
            color: #16a34a;
            margin-top: 4px;
        }

        /* ========== ARTICLE LIST ========== */
        .section-articles {
            padding: 50px 0;
        }

        .article-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .article-item {
            display: flex;
            gap: 20px;
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 18px 20px;
            transition: all var(--transition);
            align-items: center;
        }

        .article-item:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
            transform: translateX(3px);
        }

        .article-item-thumb {
            width: 140px;
            height: 100px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            flex-shrink: 0;
            border: 1px solid var(--border-light);
        }

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

        .article-item:hover .article-item-thumb img {
            transform: scale(1.05);
        }

        .article-item-info {
            flex: 1;
            min-width: 0;
        }

        .article-item-tag {
            display: inline-block;
            padding: 3px 8px;
            font-size: 0.72rem;
            font-weight: 600;
            border-radius: 10px;
            background: var(--primary-soft);
            color: var(--primary);
            margin-bottom: 4px;
        }

        .article-item-info h3 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-strong);
            margin-bottom: 4px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .article-item-info h3 a:hover {
            color: var(--primary);
        }

        .article-item-excerpt {
            font-size: 0.85rem;
            color: var(--text-muted);
            display: -webkit-box;
            -webkit-line-clamp: 1;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .article-item-meta {
            font-size: 0.78rem;
            color: var(--text-weak);
            margin-top: 6px;
            display: flex;
            gap: 14px;
        }

        /* ========== METHODOLOGY ========== */
        .section-methodology {
            padding: 50px 0;
            background: #ffffff;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .method-steps {
            display: flex;
            gap: 0;
            position: relative;
            flex-wrap: wrap;
        }

        .method-steps::before {
            content: '';
            position: absolute;
            top: 32px;
            left: 40px;
            right: 40px;
            height: 2px;
            background: var(--border);
            z-index: 0;
        }

        .method-step {
            flex: 1;
            min-width: 160px;
            text-align: center;
            position: relative;
            z-index: 1;
            padding: 0 10px;
        }

        .method-step-num {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: var(--card-bg);
            border: 2px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 14px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary);
            font-family: var(--font-mono);
            transition: all var(--transition);
        }

        .method-step:hover .method-step-num {
            border-color: var(--primary);
            box-shadow: 0 0 0 8px var(--primary-soft);
        }

        .method-step h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-strong);
            margin-bottom: 4px;
        }

        .method-step p {
            font-size: 0.82rem;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* ========== FAQ ========== */
        .section-faq {
            padding: 50px 0;
        }

        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

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

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

        .faq-question {
            width: 100%;
            text-align: left;
            padding: 18px 20px;
            font-weight: 600;
            font-size: 0.98rem;
            color: var(--text-strong);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            cursor: pointer;
            transition: all var(--transition-fast);
        }

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

        .faq-arrow {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--bg);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.7rem;
            transition: transform var(--transition-fast);
            color: var(--text-muted);
        }

        .faq-item.open .faq-arrow {
            transform: rotate(180deg);
            background: var(--primary-soft);
            color: var(--primary);
        }

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

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

        .faq-answer-inner {
            padding: 0 20px 18px;
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ========== CTA ========== */
        .section-cta {
            padding: 60px 0;
            background: linear-gradient(160deg, var(--primary) 0%, #154a53 100%);
            color: #ffffff;
            text-align: center;
            border-radius: 0;
        }

        .cta-inner {
            max-width: 620px;
            margin: 0 auto;
        }

        .cta-title {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 10px;
            letter-spacing: -0.4px;
        }

        .cta-desc {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 24px;
            line-height: 1.6;
        }

        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            background: #ffffff;
            color: var(--primary);
            font-weight: 700;
            font-size: 1rem;
            border-radius: 28px;
            transition: all var(--transition);
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
        }

        .cta-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.25);
            background: #f0fdfa;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: #ffffff;
            border-top: 1px solid var(--border);
            padding: 36px 0;
            text-align: center;
            margin-top: auto;
        }

        .footer-brand {
            font-weight: 700;
            font-size: 1.1rem;
            color: var(--text-strong);
            margin-bottom: 6px;
        }

        .site-footer p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 8px;
        }

        .footer-links {
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
        }

        .footer-links a {
            font-size: 0.85rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

        .footer-links a:hover {
            color: var(--primary);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .banner-inner {
                flex-direction: column;
                text-align: center;
            }
            .banner-desc {
                max-width: 100%;
            }
            .banner-stats {
                justify-content: center;
            }
            .banner-visual {
                width: 240px;
                height: 220px;
            }
            .dimensions-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .kpi-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .method-steps::before {
                display: none;
            }
            .method-steps {
                gap: 16px;
            }
            .method-step {
                flex: 0 0 calc(50% - 8px);
                min-width: 0;
            }
        }

        @media (max-width: 768px) {
            .mobile-toggle {
                display: flex;
            }
            .nav-menu {
                position: fixed;
                top: 0;
                right: -100%;
                width: 280px;
                height: 100vh;
                background: #ffffff;
                flex-direction: column;
                padding: 90px 24px 30px;
                gap: 4px;
                box-shadow: var(--shadow-lg);
                transition: right var(--transition);
                z-index: 999;
                align-items: stretch;
            }
            .nav-menu.open {
                right: 0;
            }
            .nav-menu li a {
                display: block;
                padding: 12px 16px;
                border-radius: var(--radius-sm);
                text-align: center;
            }
            .nav-cta {
                margin-left: 0;
                margin-top: 8px;
            }
            .nav-cta a {
                display: block;
                text-align: center;
            }
            .banner-title {
                font-size: 2rem;
            }
            .banner-visual {
                width: 200px;
                height: 180px;
            }
            .dimensions-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .dimension-card-img {
                height: 140px;
            }
            .kpi-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
            }
            .kpi-number {
                font-size: 2.2rem;
            }
            .article-item {
                flex-direction: column;
                align-items: flex-start;
            }
            .article-item-thumb {
                width: 100%;
                height: 160px;
            }
            .method-step {
                flex: 0 0 100%;
            }
            .section-title {
                font-size: 1.6rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .banner-title {
                font-size: 1.7rem;
            }
            .banner-desc {
                font-size: 0.95rem;
            }
            .banner-stats {
                gap: 12px;
            }
            .banner-stat-item {
                padding: 10px 14px;
                min-width: 70px;
            }
            .banner-stat-num {
                font-size: 1.5rem;
            }
            .banner-visual {
                width: 100%;
                height: 180px;
            }
            .dimensions-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .dimension-card-img {
                height: 160px;
            }
            .kpi-grid {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }
            .kpi-card {
                padding: 20px 10px;
            }
            .kpi-number {
                font-size: 1.8rem;
            }
            .overview-grid {
                grid-template-columns: 1fr;
            }
            .faq-question {
                font-size: 0.9rem;
                padding: 14px 16px;
            }
            .cta-title {
                font-size: 1.4rem;
            }
            .logo-text {
                font-size: 1rem;
            }
            .page-banner {
                padding: 40px 0;
            }
        }

        /* overlay for mobile nav */
        .nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.3);
            z-index: 998;
        }
        .nav-overlay.show {
            display: block;
        }