:root {
            --primary-color: #2c3e50;
            --secondary-color: #3498db;
            --accent-color: #e74c3c;
            --light-color: #ecf0f1;
            --dark-color: #1a252f;
            --text-color: #333;
            --gray-color: #7f8c8d;
            --spacing-xs: 0.5rem;
            --spacing-sm: 1rem;
            --spacing-md: 2rem;
            --spacing-lg: 4rem;
            --border-radius: 8px;
            --shadow: 0 4px 12px rgba(0,0,0,0.1);
            --transition: all 0.3s ease;
        }
        * {
            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-color);
            background-color: #f9f9f9;
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 var(--spacing-sm);
        }
        a {
            color: var(--secondary-color);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent-color);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--border-radius);
        }
        .container {
            width: 100%;
            padding-right: 15px;
            padding-left: 15px;
            margin-right: auto;
            margin-left: auto;
        }
        .site-header {
            background-color: var(--primary-color);
            color: white;
            padding: var(--spacing-sm) 0;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 700;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo:hover {
            color: var(--light-color);
        }
        .my-logo i {
            color: var(--secondary-color);
        }
        .breadcrumb {
            font-size: 0.9rem;
            color: var(--light-color);
            margin-top: 5px;
            width: 100%;
        }
        .breadcrumb a {
            color: var(--light-color);
        }
        .breadcrumb a:hover {
            color: var(--secondary-color);
        }
        .main-nav {
            display: flex;
            align-items: center;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: var(--spacing-md);
        }
        .nav-links a {
            color: white;
            font-weight: 500;
            padding: 5px 0;
            border-bottom: 2px solid transparent;
        }
        .nav-links a:hover, .nav-links a.active {
            border-bottom-color: var(--secondary-color);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
        }
        .hero {
            background: linear-gradient(rgba(44, 62, 80, 0.8), rgba(44, 62, 80, 0.9)), url('https://images.unsplash.com/photo-1513475382585-d06e58bcb0e0?ixlib=rb-4.0.3&auto=format&fit=crop&w=1200&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: var(--spacing-lg) 0;
            border-radius: 0 0 var(--border-radius) var(--border-radius);
            margin-bottom: var(--spacing-md);
            text-align: center;
        }
        .hero h1 {
            font-size: 3rem;
            margin-bottom: var(--spacing-sm);
            text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
        }
        .hero p {
            font-size: 1.2rem;
            max-width: 800px;
            margin: 0 auto var(--spacing-md);
            opacity: 0.9;
        }
        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: var(--spacing-md);
            margin-bottom: var(--spacing-lg);
        }
        .main-content {
            background: white;
            padding: var(--spacing-md);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .sidebar {
            background: white;
            padding: var(--spacing-md);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            align-self: start;
        }
        h1, h2, h3, h4 {
            color: var(--primary-color);
            margin-top: var(--spacing-md);
            margin-bottom: var(--spacing-sm);
            line-height: 1.3;
        }
        h1 {
            font-size: 2.8rem;
            border-bottom: 3px solid var(--secondary-color);
            padding-bottom: 10px;
        }
        h2 {
            font-size: 2rem;
            border-left: 5px solid var(--secondary-color);
            padding-left: 15px;
        }
        h3 {
            font-size: 1.6rem;
            color: var(--dark-color);
        }
        h4 {
            font-size: 1.3rem;
            color: var(--gray-color);
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.2rem;
            font-weight: 500;
            color: var(--primary-color);
            background-color: #e8f4fc;
            padding: var(--spacing-sm);
            border-radius: var(--border-radius);
            border-left: 4px solid var(--secondary-color);
        }
        .highlight {
            background-color: #fff9e6;
            padding: 2px 6px;
            border-radius: 4px;
            font-weight: 600;
        }
        .info-box {
            background-color: #f0f7ff;
            border: 1px solid var(--secondary-color);
            border-radius: var(--border-radius);
            padding: var(--spacing-sm);
            margin: var(--spacing-md) 0;
        }
        .info-box h4 {
            margin-top: 0;
            color: var(--secondary-color);
        }
        .featured-image {
            margin: var(--spacing-md) 0;
            text-align: center;
        }
        .featured-image figcaption {
            font-size: 0.9rem;
            color: var(--gray-color);
            margin-top: 5px;
            font-style: italic;
        }
        ul, ol {
            margin-left: 1.5rem;
            margin-bottom: 1.2rem;
        }
        li {
            margin-bottom: 0.5rem;
        }
        .form-group {
            margin-bottom: var(--spacing-sm);
        }
        .form-group label {
            display: block;
            margin-bottom: 5px;
            font-weight: 600;
            color: var(--primary-color);
        }
        .form-control {
            width: 100%;
            padding: 10px 15px;
            border: 1px solid #ddd;
            border-radius: var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-control:focus {
            outline: none;
            border-color: var(--secondary-color);
            box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
        }
        .btn {
            display: inline-block;
            padding: 10px 25px;
            background-color: var(--secondary-color);
            color: white;
            border: none;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-size: 1rem;
            font-weight: 600;
            transition: var(--transition);
        }
        .btn:hover {
            background-color: #2980b9;
            transform: translateY(-2px);
        }
        .btn-accent {
            background-color: var(--accent-color);
        }
        .btn-accent:hover {
            background-color: #c0392b;
        }
        .rating {
            display: flex;
            gap: 5px;
            margin: 10px 0;
        }
        .rating input {
            display: none;
        }
        .rating label {
            font-size: 1.5rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .rating input:checked ~ label,
        .rating label:hover,
        .rating label:hover ~ label {
            color: #f1c40f;
        }
        .comment {
            border-bottom: 1px solid #eee;
            padding: var(--spacing-sm) 0;
        }
        .comment:last-child {
            border-bottom: none;
        }
        .comment-author {
            font-weight: 700;
            color: var(--primary-color);
        }
        .comment-date {
            font-size: 0.85rem;
            color: var(--gray-color);
        }
        .comment-text {
            margin-top: 5px;
        }
        .widget {
            margin-bottom: var(--spacing-md);
            padding-bottom: var(--spacing-sm);
            border-bottom: 1px solid #eee;
        }
        .widget:last-child {
            border-bottom: none;
        }
        .widget-title {
            font-size: 1.2rem;
            color: var(--primary-color);
            margin-bottom: var(--spacing-sm);
            padding-bottom: 5px;
            border-bottom: 2px solid var(--light-color);
        }
        .related-links li {
            margin-bottom: 10px;
            padding-left: 10px;
            border-left: 3px solid transparent;
            transition: var(--transition);
        }
        .related-links li:hover {
            border-left-color: var(--secondary-color);
            padding-left: 15px;
        }
        .update-info {
            font-size: 0.9rem;
            color: var(--gray-color);
            background-color: #f8f9fa;
            padding: 10px;
            border-radius: var(--border-radius);
        }
        .site-footer {
            background-color: var(--dark-color);
            color: white;
            padding: var(--spacing-lg) 0 var(--spacing-md);
            margin-top: var(--spacing-lg);
            border-radius: var(--border-radius) var(--border-radius) 0 0;
        }
        .footer-container {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: var(--spacing-md);
        }
        .footer-section {
            flex: 1;
            min-width: 250px;
        }
        .footer-title {
            font-size: 1.3rem;
            margin-bottom: var(--spacing-sm);
            color: var(--light-color);
        }
        .friend-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .friend-link {
            color: #bdc3c7;
            padding: 5px 0;
            border-bottom: 1px dashed #34495e;
        }
        .friend-link:hover {
            color: var(--secondary-color);
        }
        .copyright {
            text-align: center;
            margin-top: var(--spacing-md);
            padding-top: var(--spacing-sm);
            border-top: 1px solid #34495e;
            color: #95a5a6;
            font-size: 0.9rem;
            width: 100%;
        }
        @media (max-width: 992px) {
            .content-wrapper {
                grid-template-columns: 1fr;
            }
            .hero h1 {
                font-size: 2.5rem;
            }
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .nav-links {
                display: none;
                flex-direction: column;
                width: 100%;
                position: absolute;
                top: 100%;
                left: 0;
                background-color: var(--primary-color);
                padding: var(--spacing-sm);
                box-shadow: var(--shadow);
            }
            .nav-links.active {
                display: flex;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .hero p {
                font-size: 1rem;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.4rem;
            }
        }
        @media (max-width: 576px) {
            body {
                padding: 0 10px;
            }
            .hero {
                padding: var(--spacing-md) 0;
            }
            .main-content, .sidebar {
                padding: var(--spacing-sm);
            }
        }