:root {
            --primary-color: #2c3e50;
            --secondary-color: #3498db;
            --accent-color: #e74c3c;
            --light-color: #ecf0f1;
            --dark-color: #2c3e50;
            --text-color: #333;
            --spacing-sm: 0.5rem;
            --spacing-md: 1rem;
            --spacing-lg: 2rem;
            --border-radius: 8px;
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: #f9f9f9;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a {
            text-decoration: none;
            color: var(--secondary-color);
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent-color);
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--spacing-md);
        }
        header {
            background-color: var(--primary-color);
            color: white;
            padding: var(--spacing-md) 0;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: bold;
            color: white;
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
        }
        .my-logo:hover {
            color: var(--light-color);
        }
        .my-logo i {
            color: var(--secondary-color);
        }
        .search-form {
            display: flex;
            flex-grow: 0.5;
            max-width: 400px;
        }
        .search-form input {
            flex-grow: 1;
            padding: 0.75rem;
            border: none;
            border-radius: var(--border-radius) 0 0 var(--border-radius);
            font-size: 1rem;
        }
        .search-form button {
            background-color: var(--secondary-color);
            color: white;
            border: none;
            padding: 0.75rem 1.5rem;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-form button:hover {
            background-color: #2980b9;
        }
        nav {
            background-color: var(--dark-color);
            margin-top: var(--spacing-md);
        }
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: var(--spacing-lg);
        }
        .nav-links a {
            color: white;
            padding: var(--spacing-sm) var(--spacing-md);
            border-radius: var(--border-radius);
            font-weight: 500;
        }
        .nav-links a:hover {
            background-color: var(--secondary-color);
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .breadcrumb {
            padding: var(--spacing-sm) 0;
            background-color: var(--light-color);
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: var(--primary-color);
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        main {
            flex-grow: 1;
            padding: var(--spacing-lg) 0;
        }
        .article-header {
            text-align: center;
            margin-bottom: var(--spacing-lg);
            padding-bottom: var(--spacing-md);
            border-bottom: 2px solid var(--secondary-color);
        }
        h1 {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: var(--spacing-md);
        }
        h2 {
            font-size: 2rem;
            color: var(--primary-color);
            margin: var(--spacing-lg) 0 var(--spacing-md);
            padding-bottom: 0.5rem;
            border-bottom: 1px solid #ddd;
        }
        h3 {
            font-size: 1.75rem;
            color: var(--secondary-color);
            margin: var(--spacing-md) 0 var(--spacing-sm);
        }
        h4 {
            font-size: 1.5rem;
            color: var(--dark-color);
            margin: var(--spacing-sm) 0;
        }
        p {
            margin-bottom: var(--spacing-md);
            text-align: justify;
        }
        .content-section {
            background: white;
            padding: var(--spacing-lg);
            border-radius: var(--border-radius);
            box-shadow: 0 4px 12px rgba(0,0,0,0.05);
            margin-bottom: var(--spacing-lg);
        }
        .highlight {
            background-color: #fffde7;
            padding: var(--spacing-md);
            border-left: 4px solid var(--secondary-color);
            margin: var(--spacing-md) 0;
            font-style: italic;
        }
        img {
            max-width: 100%;
            height: auto;
            border-radius: var(--border-radius);
            display: block;
            margin: var(--spacing-md) auto;
            box-shadow: 0 4px 8px rgba(0,0,0,0.1);
        }
        .link-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: var(--spacing-md);
            margin: var(--spacing-lg) 0;
        }
        .link-card {
            background: var(--light-color);
            padding: var(--spacing-md);
            border-radius: var(--border-radius);
            transition: var(--transition);
        }
        .link-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 6px 12px rgba(0,0,0,0.1);
        }
        .form-section {
            background: white;
            padding: var(--spacing-lg);
            border-radius: var(--border-radius);
            margin: var(--spacing-lg) 0;
        }
        .form-group {
            margin-bottom: var(--spacing-md);
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: bold;
        }
        .form-group input, .form-group textarea, .form-group select {
            width: 100%;
            padding: 0.75rem;
            border: 1px solid #ddd;
            border-radius: var(--border-radius);
            font-size: 1rem;
        }
        .form-group textarea {
            min-height: 150px;
            resize: vertical;
        }
        .btn {
            background-color: var(--secondary-color);
            color: white;
            padding: 0.75rem 1.5rem;
            border: none;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-size: 1rem;
            transition: var(--transition);
        }
        .btn:hover {
            background-color: #2980b9;
        }
        .rating {
            display: flex;
            gap: 0.5rem;
            margin: var(--spacing-sm) 0;
        }
        .rating i {
            color: #ffc107;
            cursor: pointer;
            font-size: 1.5rem;
        }
        .rating i:hover {
            color: #ff9800;
        }
        footer {
            background-color: var(--primary-color);
            color: white;
            padding: var(--spacing-lg) 0;
            margin-top: auto;
        }
        .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 {
            color: white;
            border-bottom: 2px solid var(--secondary-color);
            padding-bottom: 0.5rem;
            margin-bottom: var(--spacing-md);
        }
        friend-link {
            display: block;
            background-color: rgba(255,255,255,0.1);
            padding: var(--spacing-sm);
            margin: 0.5rem 0;
            border-radius: var(--border-radius);
            transition: var(--transition);
        }
        friend-link:hover {
            background-color: rgba(255,255,255,0.2);
        }
        friend-link a {
            color: white;
        }
        .copyright {
            text-align: center;
            padding-top: var(--spacing-md);
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 0.9rem;
            color: #bdc3c7;
        }
        @media (max-width: 768px) {
            .header-top {
                flex-direction: column;
                gap: var(--spacing-md);
            }
            .search-form {
                max-width: 100%;
                width: 100%;
            }
            .hamburger {
                display: block;
            }
            .nav-links {
                display: none;
                flex-direction: column;
                width: 100%;
                background-color: var(--dark-color);
                position: absolute;
                top: 100%;
                left: 0;
                padding: var(--spacing-md);
                z-index: 1000;
            }
            .nav-links.active {
                display: flex;
            }
            .nav-links a {
                padding: var(--spacing-md);
                text-align: center;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.75rem;
            }
            .content-section {
                padding: var(--spacing-md);
            }
        }