:root {
            --primary: #1e40af;
            --primary-dark: #1e3a8a;
            --secondary: #dc2626;
            --accent: #f59e0b;
            --light: #f8fafc;
            --dark: #0f172a;
            --gray: #64748b;
            --gray-light: #e2e8f0;
            --transition: all 0.3s ease;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
            --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
            --radius: 0.5rem;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
            line-height: 1.7;
            color: var(--dark);
            background-color: #ffffff;
            overflow-x: hidden;
        }
        .site-header {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            font-size: 1.8rem;
            font-weight: 900;
            color: white;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.75rem;
            letter-spacing: -0.5px;
        }
        .logo-icon {
            color: var(--accent);
            font-size: 2rem;
        }
        .nav-desktop {
            display: flex;
            gap: 2rem;
        }
        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
        }
        .nav-desktop a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.05rem;
            padding: 0.5rem 0.75rem;
            border-radius: var(--radius);
            transition: var(--transition);
        }
        .nav-desktop a:hover,
        .nav-desktop a.active {
            background-color: rgba(255, 255, 255, 0.15);
            color: var(--accent);
        }
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        @media (max-width: 768px) {
            .mobile-menu-btn {
                display: block;
            }
        }
        .mobile-nav {
            position: fixed;
            top: 70px;
            left: 0;
            width: 100%;
            background-color: var(--primary-dark);
            padding: 1.5rem;
            transform: translateY(-100%);
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            z-index: 999;
            box-shadow: var(--shadow-lg);
        }
        .mobile-nav.active {
            transform: translateY(0);
            opacity: 1;
            visibility: visible;
        }
        .mobile-nav a {
            display: block;
            color: white;
            text-decoration: none;
            padding: 1rem 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            font-weight: 600;
            font-size: 1.1rem;
        }
        .mobile-nav a:hover {
            color: var(--accent);
            padding-left: 0.5rem;
        }
        .breadcrumb {
            max-width: 1200px;
            margin: 1.5rem auto;
            padding: 0 1.5rem;
            font-size: 0.95rem;
            color: var(--gray);
        }
        .breadcrumb a {
            color: var(--primary);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb span {
            margin: 0 0.5rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem 3rem;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
        }
        @media (max-width: 992px) {
            .container {
                grid-template-columns: 1fr;
            }
        }
        .main-content {
            background-color: white;
            border-radius: var(--radius);
            overflow: hidden;
        }
        .article-header {
            padding: 2.5rem 0 1.5rem;
            border-bottom: 3px solid var(--gray-light);
            margin-bottom: 2.5rem;
        }
        .article-header h1 {
            font-size: 2.8rem;
            line-height: 1.2;
            margin-bottom: 1rem;
            color: var(--dark);
        }
        @media (max-width: 768px) {
            .article-header h1 {
                font-size: 2.2rem;
            }
        }
        .article-meta {
            display: flex;
            gap: 1.5rem;
            color: var(--gray);
            font-size: 0.95rem;
            margin-bottom: 1.5rem;
        }
        .meta-item {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .article-content {
            font-size: 1.125rem;
            color: #334155;
        }
        .article-content p {
            margin-bottom: 1.8rem;
        }
        .article-content h2 {
            font-size: 2rem;
            margin: 3rem 0 1.5rem;
            color: var(--primary-dark);
            padding-bottom: 0.75rem;
            border-bottom: 2px solid var(--accent);
        }
        .article-content h3 {
            font-size: 1.6rem;
            margin: 2.5rem 0 1.2rem;
            color: var(--dark);
        }
        .article-content h4 {
            font-size: 1.3rem;
            margin: 2rem 0 1rem;
            color: var(--gray);
        }
        .article-content blockquote {
            border-left: 5px solid var(--accent);
            padding: 1.5rem 2rem;
            background-color: #fef3c7;
            border-radius: 0 var(--radius) var(--radius) 0;
            margin: 2.5rem 0;
            font-style: italic;
            font-size: 1.25rem;
            color: var(--dark);
        }
        .article-content ul,
        .article-content ol {
            margin: 1.5rem 0 1.5rem 2rem;
        }
        .article-content li {
            margin-bottom: 0.75rem;
        }
        .highlight-box {
            background: linear-gradient(135deg, #dbeafe 0%, #e0f2fe 100%);
            border-left: 5px solid var(--primary);
            padding: 2rem;
            border-radius: var(--radius);
            margin: 2.5rem 0;
        }
        .highlight-box h3 {
            margin-top: 0;
            color: var(--primary-dark);
        }
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1.5rem;
            margin: 2.5rem 0;
        }
        .stat-card {
            background-color: white;
            border-radius: var(--radius);
            padding: 1.5rem;
            box-shadow: var(--shadow);
            text-align: center;
            border-top: 5px solid var(--secondary);
            transition: var(--transition);
        }
        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
        }
        .stat-number {
            font-size: 3rem;
            font-weight: 900;
            color: var(--primary);
            line-height: 1;
            margin-bottom: 0.5rem;
        }
        .stat-label {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--dark);
        }
        .image-container {
            margin: 3rem 0;
            text-align: center;
        }
        .article-image {
            max-width: 100%;
            height: auto;
            border-radius: var(--radius);
            box-shadow: var(--shadow-lg);
        }
        .image-caption {
            margin-top: 0.75rem;
            font-style: italic;
            color: var(--gray);
            font-size: 0.95rem;
        }
        .cta-button {
            display: inline-block;
            background: linear-gradient(135deg, var(--secondary) 0%, #b91c1c 100%);
            color: white;
            padding: 1rem 2.5rem;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 700;
            font-size: 1.1rem;
            margin: 2rem 0;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            box-shadow: 0 4px 6px rgba(220, 38, 38, 0.2);
        }
        .cta-button:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 12px rgba(220, 38, 38, 0.3);
        }
        .keyword-link {
            color: var(--primary);
            text-decoration: none;
            font-weight: 600;
            border-bottom: 2px dotted var(--primary);
        }
        .keyword-link:hover {
            color: var(--secondary);
            border-bottom-style: solid;
        }
        .sidebar {
            background-color: white;
            border-radius: var(--radius);
            padding: 2rem;
            box-shadow: var(--shadow);
            height: fit-content;
            position: sticky;
            top: 100px;
        }
        @media (max-width: 992px) {
            .sidebar {
                position: static;
            }
        }
        .sidebar-widget {
            margin-bottom: 2.5rem;
        }
        .sidebar-widget h3 {
            font-size: 1.4rem;
            margin-bottom: 1.5rem;
            color: var(--primary-dark);
            padding-bottom: 0.75rem;
            border-bottom: 2px solid var(--gray-light);
        }
        .search-form {
            display: flex;
            margin-bottom: 2rem;
        }
        .search-input {
            flex: 1;
            padding: 0.9rem 1.2rem;
            border: 2px solid var(--gray-light);
            border-radius: var(--radius) 0 0 var(--radius);
            font-size: 1rem;
            outline: none;
            transition: var(--transition);
        }
        .search-input:focus {
            border-color: var(--primary);
        }
        .search-button {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 var(--radius) var(--radius) 0;
            cursor: pointer;
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .search-button:hover {
            background-color: var(--primary-dark);
        }
        .rating-widget {
            text-align: center;
        }
        .stars {
            display: flex;
            justify-content: center;
            gap: 0.5rem;
            margin: 1rem 0 1.5rem;
            font-size: 2rem;
            color: var(--gray-light);
        }
        .star {
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover,
        .star.active {
            color: var(--accent);
        }
        .rating-form textarea {
            width: 100%;
            padding: 1rem;
            border: 2px solid var(--gray-light);
            border-radius: var(--radius);
            margin-bottom: 1rem;
            font-family: inherit;
            resize: vertical;
            min-height: 120px;
        }
        .rating-form button {
            width: 100%;
            padding: 1rem;
            background-color: var(--primary);
            color: white;
            border: none;
            border-radius: var(--radius);
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }
        .rating-form button:hover {
            background-color: var(--primary-dark);
        }
        .comment {
            background-color: #f8fafc;
            padding: 1.5rem;
            border-radius: var(--radius);
            margin-bottom: 1.5rem;
            border-left: 4px solid var(--primary);
        }
        .comment-header {
            display: flex;
            justify-content: space-between;
            margin-bottom: 0.75rem;
            font-size: 0.95rem;
            color: var(--gray);
        }
        .comment-author {
            font-weight: 700;
            color: var(--dark);
        }
        .longtail-links {
            max-width: 1200px;
            margin: 3rem auto 2rem;
            padding: 0 1.5rem;
        }
        .longtail-links h2 {
            font-size: 1.8rem;
            color: var(--primary-dark);
            margin-bottom: 1.5rem;
            text-align: center;
        }
        .web-links-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 1.5rem;
        }
        .web-link {
            background-color: white;
            border-radius: var(--radius);
            padding: 1.5rem;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 1px solid var(--gray-light);
        }
        .web-link:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary);
        }
        .web-link a {
            color: var(--dark);
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
            display: block;
            line-height: 1.4;
        }
        .web-link a:hover {
            color: var(--primary);
        }
        .web-link p {
            margin-top: 0.75rem;
            color: var(--gray);
            font-size: 0.95rem;
        }
        .site-footer {
            background-color: var(--dark);
            color: white;
            padding: 4rem 0 2rem;
            margin-top: 3rem;
        }
        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 3rem;
        }
        .footer-col h3 {
            font-size: 1.4rem;
            margin-bottom: 1.5rem;
            color: var(--accent);
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.75rem;
        }
        .footer-links a {
            color: #cbd5e1;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: white;
            padding-left: 0.5rem;
        }
        .copyright {
            text-align: center;
            padding-top: 3rem;
            margin-top: 3rem;
            border-top: 1px solid #334155;
            color: #94a3b8;
            font-size: 0.95rem;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }
        .text-center { text-align: center; }
        .mb-1 { margin-bottom: 1rem; }
        .mb-2 { margin-bottom: 2rem; }
        .mb-3 { margin-bottom: 3rem; }
        .mt-1 { margin-top: 1rem; }
        .mt-2 { margin-top: 2rem; }
        .mt-3 { margin-top: 3rem; }
        .emoji {
            font-size: 1.2em;
            margin-right: 0.3rem;
        }
        .bold {
            font-weight: 800;
            color: var(--dark);
        }
        .highlight {
            background-color: #fef3c7;
            padding: 0.2rem 0.4rem;
            border-radius: 0.25rem;
        }
        .tag {
            display: inline-block;
            background-color: var(--gray-light);
            color: var(--dark);
            padding: 0.3rem 0.8rem;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-right: 0.5rem;
            margin-bottom: 0.5rem;
        }
        .tag-primary {
            background-color: #dbeafe;
            color: var(--primary-dark);
        }
        @media (max-width: 768px) {
            .header-container,
            .breadcrumb,
            .container,
            .longtail-links,
            .footer-container {
                padding-left: 1rem;
                padding-right: 1rem;
            }
            .article-header {
                padding: 2rem 0 1rem;
            }
            .article-meta {
                flex-direction: column;
                gap: 0.75rem;
            }
            .stat-grid {
                grid-template-columns: 1fr;
            }
        }