:root {
            --primary-color: #1a5fb4; 
            --secondary-color: #e6a400; 
            --dark-bg: #0d1b2a;
            --light-bg: #f8f9fa;
            --text-dark: #2c3e50;
            --text-light: #e8f1f5;
            --accent-red: #c41e3a; 
            --spacing-xs: 0.5rem;
            --spacing-sm: 1rem;
            --spacing-md: 2rem;
            --spacing-lg: 4rem;
            --border-radius: 8px;
            --transition: all 0.3s ease;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--text-dark);
            background-color: var(--light-bg);
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        .site-header {
            background: linear-gradient(135deg, var(--dark-bg) 0%, #1e3a5f 100%);
            color: var(--text-light);
            padding: var(--spacing-sm) 0;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--spacing-sm);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-family: 'Arial Black', Gadget, sans-serif;
            font-size: 2.2rem;
            background: linear-gradient(to right, var(--primary-color), var(--accent-red));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-decoration: none;
            letter-spacing: 1.5px;
            transition: var(--transition);
            text-shadow: 0 2px 4px rgba(0,0,0,0.3);
        }
        .my-logo:hover {
            transform: scale(1.05);
            text-shadow: 0 4px 8px rgba(0,0,0,0.5);
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: var(--spacing-md);
        }
        .main-nav a {
            color: var(--text-light);
            text-decoration: none;
            font-weight: 600;
            padding: var(--spacing-xs) var(--spacing-sm);
            border-radius: var(--border-radius);
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .main-nav a:hover, .main-nav a.active {
            background-color: rgba(255, 255, 255, 0.15);
            color: var(--secondary-color);
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: var(--text-light);
            cursor: pointer;
        }
        .breadcrumb {
            background-color: #e9ecef;
            padding: var(--spacing-sm);
            font-size: 0.9rem;
            border-bottom: 1px solid #ddd;
        }
        .breadcrumb ol {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            list-style: none;
            padding-left: var(--spacing-sm);
        }
        .breadcrumb li {
            display: inline;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '›';
            margin: 0 0.5rem;
            color: #666;
        }
        .breadcrumb a {
            color: var(--primary-color);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .main-container {
            max-width: 1200px;
            margin: var(--spacing-md) auto;
            padding: 0 var(--spacing-sm);
            flex: 1;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: var(--spacing-lg);
        }
        @media (max-width: 992px) {
            .main-container {
                grid-template-columns: 1fr;
            }
        }
        .content-area {
            background-color: white;
            border-radius: var(--border-radius);
            padding: var(--spacing-lg);
            box-shadow: var(--shadow);
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-md);
        }
        .widget {
            background-color: white;
            border-radius: var(--border-radius);
            padding: var(--spacing-md);
            box-shadow: var(--shadow);
        }
        .widget h3 {
            color: var(--primary-color);
            border-bottom: 2px solid var(--secondary-color);
            padding-bottom: var(--spacing-xs);
            margin-bottom: var(--spacing-md);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .search-form {
            display: flex;
        }
        .search-input {
            flex: 1;
            padding: 0.8rem;
            border: 2px solid #ddd;
            border-right: none;
            border-radius: var(--border-radius) 0 0 var(--border-radius);
            font-size: 1rem;
        }
        .search-button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0 1.2rem;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-button:hover {
            background-color: #0d4a9e;
        }
        .rating-form, .comment-form {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }
        .star-rating {
            display: flex;
            justify-content: center;
            gap: 0.5rem;
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            margin-bottom: var(--spacing-sm);
        }
        .star-rating .star:hover,
        .star-rating .star:hover ~ .star {
            color: #ffc107;
        }
        .star-rating input {
            display: none;
        }
        .star-rating input:checked ~ .star {
            color: #ffc107;
        }
        .form-input, .form-textarea {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid #ccc;
            border-radius: var(--border-radius);
            font-family: inherit;
            font-size: 1rem;
        }
        .form-textarea {
            min-height: 120px;
            resize: vertical;
        }
        .form-button {
            background-color: var(--secondary-color);
            color: var(--dark-bg);
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: var(--border-radius);
            font-weight: bold;
            cursor: pointer;
            transition: var(--transition);
        }
        .form-button:hover {
            background-color: #d18f00;
            transform: translateY(-2px);
        }
        .article-header {
            text-align: center;
            margin-bottom: var(--spacing-lg);
            padding-bottom: var(--spacing-md);
            border-bottom: 3px solid var(--secondary-color);
        }
        .article-header h1 {
            color: var(--primary-color);
            font-size: 2.8rem;
            margin-bottom: var(--spacing-sm);
            line-height: 1.2;
        }
        .article-meta {
            display: flex;
            justify-content: center;
            gap: var(--spacing-md);
            color: #666;
            font-size: 0.9rem;
            flex-wrap: wrap;
        }
        .article-meta span {
            display: flex;
            align-items: center;
            gap: 0.3rem;
        }
        .article-image {
            width: 100%;
            max-height: 500px;
            object-fit: cover;
            border-radius: var(--border-radius);
            margin: var(--spacing-md) 0;
            box-shadow: 0 6px 16px rgba(0,0,0,0.15);
            transition: transform 0.5s ease;
        }
        .article-image:hover {
            transform: scale(1.01);
        }
        .content-section {
            margin-bottom: var(--spacing-lg);
        }
        h2 {
            color: var(--primary-color);
            font-size: 2rem;
            margin: var(--spacing-md) 0 var(--spacing-sm);
            padding-bottom: 0.5rem;
            border-bottom: 1px solid #eee;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        h3 {
            color: #2c5282;
            font-size: 1.6rem;
            margin: var(--spacing-md) 0 var(--spacing-xs);
        }
        h4 {
            color: #4a5568;
            font-size: 1.3rem;
            margin: var(--spacing-sm) 0 var(--spacing-xs);
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
        }
        .highlight {
            background-color: #fff9db;
            border-left: 4px solid var(--secondary-color);
            padding: var(--spacing-sm);
            margin: var(--spacing-md) 0;
            font-style: italic;
        }
        .tip-box {
            background-color: #e8f4fd;
            border-left: 4px solid var(--primary-color);
            padding: var(--spacing-sm);
            margin: var(--spacing-md) 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .tip-box strong {
            color: var(--primary-color);
        }
        ul, ol {
            margin-left: 1.5rem;
            margin-bottom: 1.2rem;
        }
        li {
            margin-bottom: 0.5rem;
        }
        a.content-link {
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 600;
            border-bottom: 1px dashed currentColor;
            transition: var(--transition);
        }
        a.content-link:hover {
            color: var(--accent-red);
            border-bottom-style: solid;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 0.3rem;
        }
        .site-footer {
            background-color: var(--dark-bg);
            color: var(--text-light);
            padding: var(--spacing-lg) 0 var(--spacing-sm);
            margin-top: var(--spacing-lg);
        }
        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--spacing-sm);
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: var(--spacing-lg);
        }
        .footer-logo {
            font-size: 1.8rem;
            margin-bottom: var(--spacing-sm);
        }
        .footer-heading {
            color: var(--secondary-color);
            font-size: 1.3rem;
            margin-bottom: var(--spacing-sm);
            border-bottom: 1px solid #2d3748;
            padding-bottom: 0.5rem;
        }
        friend-link {
            display: block;
            margin-bottom: 0.8rem;
        }
        friend-link a {
            color: #cbd5e0;
            text-decoration: none;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        friend-link a:hover {
            color: var(--secondary-color);
            transform: translateX(5px);
        }
        .copyright {
            text-align: center;
            padding-top: var(--spacing-md);
            margin-top: var(--spacing-md);
            border-top: 1px solid #2d3748;
            font-size: 0.9rem;
            color: #a0aec0;
            grid-column: 1 / -1;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .main-nav ul {
                position: fixed;
                top: 80px;
                left: 0;
                right: 0;
                background-color: var(--dark-bg);
                flex-direction: column;
                padding: var(--spacing-md);
                gap: 0;
                box-shadow: 0 10px 15px rgba(0,0,0,0.2);
                transform: translateY(-150%);
                opacity: 0;
                transition: transform 0.3s ease, opacity 0.3s ease;
                z-index: 999;
            }
            .main-nav ul.active {
                transform: translateY(0);
                opacity: 1;
            }
            .main-nav li {
                width: 100%;
            }
            .main-nav a {
                padding: 1rem;
                border-radius: 0;
                border-bottom: 1px solid #2d3748;
                display: block;
            }
            .article-header h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.5rem;
            }
            .main-container {
                gap: var(--spacing-md);
                margin: var(--spacing-sm) auto;
            }
            .content-area {
                padding: var(--spacing-md);
            }
        }
        @media print {
            .site-header, .sidebar, .site-footer, .breadcrumb, .search-form, .rating-form, .comment-form {
                display: none;
            }
            .main-container {
                grid-template-columns: 1fr;
                margin: 0;
                padding: 0;
            }
            .content-area {
                box-shadow: none;
                padding: 0;
            }
            a {
                color: black;
                text-decoration: underline;
            }
            h1, h2, h3 {
                page-break-after: avoid;
            }
            p {
                orphans: 3;
                widows: 3;
            }
        }