:root {
            --primary-dark: #0f172a;
            --primary-blue: #1e40af;
            --accent-orange: #f97316;
            --accent-red: #dc2626;
            --neutral-light: #f8fafc;
            --neutral-gray: #64748b;
            --neutral-dark: #334155;
            --transition: all 0.3s ease;
            --shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
            --radius: 12px;
            font-size: 16px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
        }
        body {
            background-color: var(--neutral-light);
            color: var(--primary-dark);
            line-height: 1.7;
            overflow-x: hidden;
        }
        a {
            color: var(--primary-blue);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent-orange);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius);
        }
        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        .site-header {
            background: linear-gradient(135deg, var(--primary-dark) 0%, #1e293b 100%);
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 900;
            color: white;
            text-transform: uppercase;
            letter-spacing: 2px;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .my-logo i {
            color: var(--accent-orange);
        }
        .my-logo span {
            background: linear-gradient(to right, #60a5fa, var(--accent-orange));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .breadcrumb {
            background-color: var(--neutral-light);
            padding: 0.8rem 0;
            border-bottom: 1px solid #e2e8f0;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: var(--neutral-gray);
        }
        .breadcrumb a:hover {
            color: var(--primary-blue);
        }
        .breadcrumb .separator {
            margin: 0 0.5rem;
            color: var(--neutral-gray);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: white;
            cursor: pointer;
            padding: 0.5rem;
        }
        .main-nav {
            display: flex;
            gap: 2rem;
        }
        .nav-link {
            color: #cbd5e1;
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: var(--accent-orange);
            transition: var(--transition);
        }
        .nav-link:hover {
            color: white;
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .search-container {
            margin: 2rem auto;
            max-width: 700px;
        }
        .search-form {
            display: flex;
            box-shadow: var(--shadow);
            border-radius: 50px;
            overflow: hidden;
        }
        .search-input {
            flex-grow: 1;
            padding: 1rem 1.5rem;
            border: none;
            font-size: 1rem;
            outline: none;
        }
        .search-btn {
            background: linear-gradient(to right, var(--primary-blue), var(--accent-orange));
            color: white;
            border: none;
            padding: 0 2rem;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .search-btn:hover {
            opacity: 0.9;
        }
        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin: 2.5rem 0;
        }
        @media (max-width: 992px) {
            .content-wrapper {
                grid-template-columns: 1fr;
            }
        }
        .main-article {
            background: white;
            padding: 2.5rem;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .article-header {
            margin-bottom: 2.5rem;
            border-bottom: 2px solid #f1f5f9;
            padding-bottom: 1.5rem;
        }
        .article-header h1 {
            font-size: 2.8rem;
            line-height: 1.2;
            margin-bottom: 1rem;
            color: var(--primary-dark);
        }
        .meta-info {
            display: flex;
            gap: 1.5rem;
            color: var(--neutral-gray);
            font-size: 0.9rem;
            flex-wrap: wrap;
        }
        .meta-info i {
            margin-right: 0.5rem;
        }
        .last-updated {
            color: var(--accent-red);
            font-weight: 600;
        }
        .article-content {
            font-size: 1.1rem;
        }
        .article-content h2 {
            font-size: 2rem;
            margin: 2.5rem 0 1.2rem;
            color: var(--primary-dark);
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #e2e8f0;
        }
        .article-content h3 {
            font-size: 1.6rem;
            margin: 2rem 0 1rem;
            color: var(--primary-blue);
        }
        .article-content h4 {
            font-size: 1.3rem;
            margin: 1.5rem 0 0.8rem;
            color: var(--neutral-dark);
        }
        .article-content p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .highlight-box {
            background: linear-gradient(to right, #fef3c7, #fde68a);
            border-left: 5px solid var(--accent-orange);
            padding: 1.5rem;
            border-radius: 0 var(--radius) var(--radius) 0;
            margin: 2rem 0;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        .stat-card {
            background: white;
            border: 1px solid #e2e8f0;
            border-radius: var(--radius);
            padding: 1.5rem;
            text-align: center;
            box-shadow: 0 4px 6px rgba(0,0,0,0.05);
            transition: var(--transition);
        }
        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow);
        }
        .stat-card .number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary-blue);
            line-height: 1;
        }
        .feature-image {
            margin: 2.5rem 0;
            position: relative;
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: var(--neutral-gray);
            margin-top: 0.5rem;
            font-size: 0.95rem;
        }
        .related-links {
            background: #f1f5f9;
            padding: 1.5rem;
            border-radius: var(--radius);
            margin: 2.5rem 0;
        }
        .related-links h3 {
            margin-top: 0;
        }
        .related-links ul {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1rem;
        }
        .related-links li a {
            display: block;
            padding: 0.8rem;
            background: white;
            border-radius: 8px;
            border: 1px solid #cbd5e1;
        }
        .related-links li a:hover {
            background: var(--primary-blue);
            color: white;
            border-color: var(--primary-blue);
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .sidebar-widget {
            background: white;
            padding: 1.8rem;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .sidebar-widget h3 {
            font-size: 1.4rem;
            margin-bottom: 1.2rem;
            padding-bottom: 0.75rem;
            border-bottom: 2px solid #f1f5f9;
            color: var(--primary-dark);
        }
        .comment-form, .rating-form {
            display: flex;
            flex-direction: column;
            gap: 1.2rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .form-group label {
            font-weight: 600;
            color: var(--neutral-dark);
        }
        .form-control {
            padding: 0.9rem 1rem;
            border: 1px solid #cbd5e1;
            border-radius: 8px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-control:focus {
            outline: none;
            border-color: var(--primary-blue);
            box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.1);
        }
        textarea.form-control {
            min-height: 150px;
            resize: vertical;
        }
        .star-rating {
            display: flex;
            gap: 0.5rem;
            font-size: 1.8rem;
            color: #e2e8f0;
            cursor: pointer;
        }
        .star-rating .star {
            transition: var(--transition);
        }
        .star-rating .star:hover,
        .star-rating .star.active {
            color: #fbbf24;
        }
        .btn-submit {
            background: linear-gradient(to right, var(--primary-blue), var(--accent-orange));
            color: white;
            border: none;
            padding: 1rem 1.5rem;
            border-radius: 8px;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition);
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.75rem;
        }
        .btn-submit:hover {
            opacity: 0.9;
            transform: translateY(-2px);
        }
        .site-footer {
            background: var(--primary-dark);
            color: #cbd5e1;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .footer-section h4 {
            color: white;
            font-size: 1.3rem;
            margin-bottom: 1.5rem;
            position: relative;
            padding-bottom: 0.75rem;
        }
        .footer-section h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 50px;
            height: 3px;
            background: var(--accent-orange);
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #94a3b8;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 0.5rem;
        }
        friend-link {
            display: inline-block;
            background: rgba(255,255,255,0.1);
            padding: 0.5rem 1rem;
            border-radius: 20px;
            margin: 0.25rem 0.5rem 0.25rem 0;
            font-size: 0.9rem;
            border: 1px solid rgba(255,255,255,0.2);
        }
        friend-link a {
            color: #60a5fa;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #334155;
            font-size: 0.9rem;
            color: #94a3b8;
        }
        @media (max-width: 768px) {
            :root { font-size: 15px; }
            .header-content { justify-content: space-between; }
            .hamburger { display: block; }
            .main-nav {
                display: none;
                flex-direction: column;
                width: 100%;
                background: var(--primary-dark);
                padding: 1rem 0;
                margin-top: 1rem;
                border-top: 1px solid #334155;
            }
            .main-nav.active { display: flex; }
            .nav-link { padding: 0.8rem 0; border-bottom: 1px solid #2d3748; }
            .article-header h1 { font-size: 2.2rem; }
            .main-article { padding: 1.8rem; }
            .content-wrapper { gap: 2rem; }
            .stats-grid { grid-template-columns: 1fr; }
        }
        @media (max-width: 480px) {
            .meta-info { flex-direction: column; gap: 0.5rem; }
            .search-form { flex-direction: column; border-radius: var(--radius); }
            .search-input, .search-btn { width: 100%; border-radius: 0; }
        }