* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary: #1a365d;
            --secondary: #c53030;
            --accent: #ed8936;
            --light: #f7fafc;
            --dark: #2d3748;
            --gray: #a0aec0;
            --success: #38a169;
            --spacing-xs: 0.5rem;
            --spacing-sm: 1rem;
            --spacing-md: 2rem;
            --spacing-lg: 3rem;
            --spacing-xl: 5rem;
            --border-radius: 8px;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            line-height: 1.7;
            color: var(--dark);
            background-color: var(--light);
            overflow-x: hidden;
        }
        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 var(--spacing-sm);
        }
        .site-header {
            background: linear-gradient(135deg, var(--primary) 0%, #2c5282 100%);
            color: white;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: var(--spacing-sm) 0;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            text-decoration: none;
            color: white;
            letter-spacing: 1px;
            display: flex;
            align-items: center;
            gap: var(--spacing-xs);
            transition: var(--transition);
        }
        .my-logo:hover {
            color: var(--accent);
            transform: translateY(-2px);
        }
        .my-logo span {
            color: var(--accent);
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: var(--spacing-md);
        }
        .main-nav a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: var(--border-radius);
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .main-nav a:hover {
            background: rgba(255, 255, 255, 0.15);
            color: var(--accent);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        .breadcrumb {
            background: #e2e8f0;
            padding: var(--spacing-sm);
            margin-bottom: var(--spacing-md);
            border-radius: var(--border-radius);
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .breadcrumb li {
            display: flex;
            align-items: center;
        }
        .breadcrumb a {
            color: var(--primary);
            text-decoration: none;
            font-weight: 500;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb .separator {
            margin: 0 0.5rem;
            color: var(--gray);
        }
        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: var(--spacing-lg);
            margin: var(--spacing-lg) 0;
        }
        .main-content {
            background: white;
            padding: var(--spacing-lg);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .article-header {
            margin-bottom: var(--spacing-lg);
            padding-bottom: var(--spacing-md);
            border-bottom: 3px solid var(--accent);
        }
        .article-header h1 {
            font-size: 3rem;
            color: var(--primary);
            margin-bottom: var(--spacing-sm);
            line-height: 1.2;
        }
        .article-meta {
            display: flex;
            gap: var(--spacing-md);
            color: var(--gray);
            font-size: 0.9rem;
            flex-wrap: wrap;
        }
        .article-meta span {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .content-section {
            margin-bottom: var(--spacing-xl);
        }
        .content-section h2 {
            font-size: 2.2rem;
            color: var(--primary);
            margin: var(--spacing-lg) 0 var(--spacing-md);
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #e2e8f0;
        }
        .content-section h3 {
            font-size: 1.8rem;
            color: var(--secondary);
            margin: var(--spacing-md) 0 var(--spacing-sm);
        }
        .content-section h4 {
            font-size: 1.4rem;
            color: var(--dark);
            margin: var(--spacing-sm) 0;
        }
        .content-section p {
            margin-bottom: 1.5rem;
            font-size: 1.125rem;
        }
        .content-section ul, .content-section ol {
            margin-left: 2rem;
            margin-bottom: 1.5rem;
        }
        .content-section li {
            margin-bottom: 0.75rem;
        }
        .highlight {
            background: linear-gradient(120deg, rgba(237, 137, 54, 0.15) 0%, rgba(237, 137, 54, 0.05) 100%);
            border-left: 4px solid var(--accent);
            padding: var(--spacing-md);
            margin: var(--spacing-md) 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .key-point {
            background: #f0fff4;
            border: 1px solid var(--success);
            padding: var(--spacing-md);
            border-radius: var(--border-radius);
            margin: var(--spacing-md) 0;
            position: relative;
        }
        .key-point::before {
            content: '💡';
            position: absolute;
            left: -15px;
            top: 50%;
            transform: translateY(-50%);
            background: white;
            border-radius: 50%;
            padding: 5px;
            border: 2px solid var(--success);
        }
        .stats-box {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: var(--spacing-sm);
            margin: var(--spacing-md) 0;
        }
        .stat-item {
            background: var(--light);
            padding: var(--spacing-md);
            border-radius: var(--border-radius);
            text-align: center;
            border-top: 4px solid var(--primary);
            transition: var(--transition);
        }
        .stat-item:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow);
        }
        .stat-value {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary);
            display: block;
            line-height: 1;
        }
        .stat-label {
            font-size: 0.9rem;
            color: var(--gray);
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .featured-image {
            width: 100%;
            margin: var(--spacing-lg) 0;
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .featured-image img {
            width: 100%;
            height: auto;
            display: block;
            transition: transform 0.5s ease;
        }
        .featured-image:hover img {
            transform: scale(1.03);
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: var(--gray);
            padding: var(--spacing-sm);
            background: #f8f9fa;
            font-size: 0.9rem;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-md);
        }
        .sidebar-widget {
            background: white;
            padding: var(--spacing-md);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .widget-title {
            font-size: 1.3rem;
            color: var(--primary);
            margin-bottom: var(--spacing-sm);
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #e2e8f0;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .search-form {
            display: flex;
            margin-bottom: var(--spacing-md);
        }
        .search-input {
            flex: 1;
            padding: 0.875rem 1rem;
            border: 2px solid #e2e8f0;
            border-radius: var(--border-radius) 0 0 var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        .search-input:focus {
            outline: none;
            border-color: var(--accent);
        }
        .search-button {
            background: var(--primary);
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            cursor: pointer;
            transition: var(--transition);
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .search-button:hover {
            background: var(--secondary);
        }
        .comment-form, .rating-form {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .form-label {
            font-weight: 600;
            color: var(--dark);
        }
        .form-input, .form-textarea {
            padding: 0.875rem;
            border: 2px solid #e2e8f0;
            border-radius: var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-input:focus, .form-textarea:focus {
            outline: none;
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(237, 137, 54, 0.15);
        }
        .form-textarea {
            min-height: 120px;
            resize: vertical;
            font-family: inherit;
        }
        .submit-button {
            background: linear-gradient(135deg, var(--primary) 0%, #2c5282 100%);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: var(--border-radius);
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
        }
        .submit-button:hover {
            background: linear-gradient(135deg, var(--secondary) 0%, #c53030 100%);
            transform: translateY(-2px);
            box-shadow: var(--shadow);
        }
        .rating-system {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: var(--spacing-sm);
        }
        .stars {
            display: flex;
            gap: 0.5rem;
            direction: rtl;
        }
        .star {
            font-size: 2rem;
            color: #e2e8f0;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover,
        .star:hover ~ .star {
            color: #f6ad55;
        }
        .star.selected {
            color: #ed8936;
        }
        .site-footer {
            background: var(--primary);
            color: white;
            padding: var(--spacing-xl) 0 var(--spacing-md);
            margin-top: var(--spacing-xl);
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: var(--spacing-lg);
            margin-bottom: var(--spacing-lg);
        }
        .footer-section h3 {
            font-size: 1.3rem;
            margin-bottom: var(--spacing-md);
            color: var(--accent);
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.75rem;
        }
        .footer-links a {
            color: #cbd5e0;
            text-decoration: none;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .footer-links a:hover {
            color: var(--accent);
            transform: translateX(5px);
        }
        friend-link {
            display: block;
            background: rgba(255, 255, 255, 0.05);
            padding: var(--spacing-sm);
            border-radius: var(--border-radius);
            margin: 0.5rem 0;
            transition: var(--transition);
        }
        friend-link:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateX(5px);
        }
        friend-link a {
            color: #cbd5e0;
            text-decoration: none;
            display: block;
        }
        friend-link a:hover {
            color: white;
        }
        .copyright {
            text-align: center;
            padding-top: var(--spacing-md);
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #a0aec0;
            font-size: 0.9rem;
        }
        .text-accent {
            color: var(--accent);
        }
        .text-bold {
            font-weight: 800;
        }
        .text-center {
            text-align: center;
        }
        .mb-1 { margin-bottom: var(--spacing-sm); }
        .mb-2 { margin-bottom: var(--spacing-md); }
        .mb-3 { margin-bottom: var(--spacing-lg); }
        .mb-4 { margin-bottom: var(--spacing-xl); }
        @media (max-width: 1024px) {
            .content-wrapper {
                grid-template-columns: 1fr;
            }
            .article-header h1 {
                font-size: 2.5rem;
            }
        }
        @media (max-width: 768px) {
            .main-nav {
                position: fixed;
                top: 70px;
                left: 0;
                width: 100%;
                background: var(--primary);
                padding: var(--spacing-md);
                transform: translateY(-100%);
                opacity: 0;
                visibility: hidden;
                transition: var(--transition);
                box-shadow: var(--shadow);
            }
            .main-nav.active {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 0;
            }
            .main-nav a {
                padding: 1rem;
                border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            }
            .hamburger {
                display: block;
            }
            .article-header h1 {
                font-size: 2rem;
            }
            .content-section h2 {
                font-size: 1.8rem;
            }
            .content-section h3 {
                font-size: 1.5rem;
            }
            .stats-box {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 480px) {
            .article-meta {
                flex-direction: column;
                gap: var(--spacing-xs);
            }
            .content-section p {
                font-size: 1rem;
            }
            .featured-image {
                margin: var(--spacing-md) 0;
            }
        }
        @media print {
            .site-header,
            .sidebar,
            .search-form,
            .comment-form,
            .rating-form,
            .site-footer {
                display: none;
            }
            .main-content {
                box-shadow: none;
                padding: 0;
            }
            body {
                background: white;
                color: black;
            }
        }