* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary-color: #2e7d32;
            --secondary-color: #4caf50;
            --accent-color: #ff9800;
            --dark-color: #1b5e20;
            --light-color: #e8f5e9;
            --text-color: #333;
            --light-text: #666;
            --border-color: #ddd;
            --shadow: 0 4px 12px rgba(0,0,0,0.1);
            --transition: all 0.3s ease;
            --max-width: 1200px;
            --border-radius: 8px;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: #f9f9f9;
        }
        a {
            color: var(--primary-color);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--dark-color);
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
            border-bottom: 1px solid var(--border-color);
        }
        .my-logo {
            font-size: 28px;
            font-weight: 700;
            color: var(--primary-color);
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .my-logo span {
            color: var(--accent-color);
        }
        .search-form {
            display: flex;
            max-width: 400px;
            width: 100%;
        }
        .search-form input {
            flex: 1;
            padding: 10px 15px;
            border: 2px solid var(--border-color);
            border-right: none;
            border-radius: var(--border-radius) 0 0 var(--border-radius);
            font-size: 16px;
        }
        .search-form button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0 20px;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-form button:hover {
            background-color: var(--dark-color);
        }
        .main-nav {
            padding: 15px 0;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 30px;
            justify-content: center;
        }
        .nav-links a {
            font-weight: 600;
            font-size: 16px;
            padding: 5px 0;
            position: relative;
        }
        .nav-links a:hover {
            text-decoration: none;
        }
        .nav-links a:after {
            content: '';
            position: absolute;
            width: 0;
            height: 3px;
            background: var(--accent-color);
            left: 0;
            bottom: -5px;
            transition: var(--transition);
        }
        .nav-links a:hover:after {
            width: 100%;
        }
        .hamburger {
            display: none;
            font-size: 24px;
            background: none;
            border: none;
            color: var(--primary-color);
            cursor: pointer;
        }
        .breadcrumb {
            background-color: var(--light-color);
            padding: 12px 0;
            font-size: 14px;
            margin-bottom: 30px;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb li:not(:last-child):after {
            content: '›';
            margin: 0 10px;
            color: var(--light-text);
        }
        main {
            padding: 40px 0;
            background-color: white;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            margin-bottom: 40px;
        }
        .article-header {
            text-align: center;
            margin-bottom: 40px;
            padding-bottom: 30px;
            border-bottom: 1px solid var(--border-color);
        }
        h1 {
            font-size: 2.8rem;
            color: var(--dark-color);
            margin-bottom: 20px;
            line-height: 1.2;
        }
        .article-meta {
            display: flex;
            justify-content: center;
            gap: 20px;
            color: var(--light-text);
            font-size: 14px;
            margin-bottom: 20px;
        }
        .article-meta i {
            margin-right: 5px;
        }
        .featured-image {
            margin: 30px 0;
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .featured-image img {
            width: 100%;
            height: auto;
            display: block;
        }
        .article-content {
            font-size: 18px;
            max-width: 900px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .article-content p {
            margin-bottom: 25px;
            line-height: 1.8;
        }
        .article-content h2 {
            font-size: 2rem;
            color: var(--dark-color);
            margin: 50px 0 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--light-color);
        }
        .article-content h3 {
            font-size: 1.6rem;
            color: var(--primary-color);
            margin: 40px 0 15px;
        }
        .article-content h4 {
            font-size: 1.3rem;
            color: var(--secondary-color);
            margin: 30px 0 10px;
        }
        .article-content blockquote {
            border-left: 4px solid var(--accent-color);
            padding-left: 20px;
            margin: 30px 0;
            font-style: italic;
            color: var(--light-text);
            background-color: var(--light-color);
            padding: 20px;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .article-content ul, .article-content ol {
            margin-left: 30px;
            margin-bottom: 25px;
        }
        .article-content li {
            margin-bottom: 10px;
        }
        .highlight-box {
            background-color: var(--light-color);
            border-left: 5px solid var(--accent-color);
            padding: 25px;
            margin: 30px 0;
            border-radius: var(--border-radius);
        }
        .download-cta {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
            padding: 30px;
            text-align: center;
            border-radius: var(--border-radius);
            margin: 40px 0;
        }
        .download-cta h3 {
            color: white;
            margin-bottom: 15px;
        }
        .btn {
            display: inline-block;
            background-color: var(--accent-color);
            color: white;
            padding: 12px 30px;
            border-radius: 50px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-top: 15px;
            border: none;
            cursor: pointer;
            transition: var(--transition);
        }
        .btn:hover {
            background-color: #e68900;
            text-decoration: none;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.2);
        }
        .user-interaction {
            margin: 60px 0;
            padding: 30px;
            background-color: var(--light-color);
            border-radius: var(--border-radius);
        }
        .rating-section, .comment-section {
            margin-bottom: 40px;
        }
        .stars {
            display: flex;
            gap: 5px;
            margin: 15px 0;
        }
        .star {
            color: #ddd;
            font-size: 24px;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover, .star.active {
            color: #ffc107;
        }
        .rating-form, .comment-form {
            margin-top: 20px;
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
        }
        .form-group input, .form-group textarea, .form-group select {
            width: 100%;
            padding: 12px 15px;
            border: 2px solid var(--border-color);
            border-radius: var(--border-radius);
            font-size: 16px;
            transition: var(--transition);
        }
        .form-group input:focus, .form-group textarea:focus, .form-group select:focus {
            border-color: var(--primary-color);
            outline: none;
        }
        .form-group textarea {
            min-height: 150px;
            resize: vertical;
        }
        footer {
            background-color: #222;
            color: #ddd;
            padding: 50px 0 20px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-section h3 {
            color: white;
            margin-bottom: 20px;
            font-size: 1.3rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        .footer-links a {
            color: #aaa;
        }
        .footer-links a:hover {
            color: white;
        }
        friend-link {
            display: block;
            margin: 10px 0;
            padding: 8px 0;
            border-bottom: 1px dotted #444;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #444;
            color: #aaa;
            font-size: 14px;
        }
        @media (max-width: 992px) {
            h1 {
                font-size: 2.4rem;
            }
            .article-content h2 {
                font-size: 1.8rem;
            }
            .article-content h3 {
                font-size: 1.5rem;
            }
            .nav-links {
                gap: 20px;
            }
        }
        @media (max-width: 768px) {
            .header-top {
                flex-direction: column;
                gap: 20px;
            }
            .hamburger {
                display: block;
                position: absolute;
                top: 20px;
                right: 20px;
            }
            .nav-links {
                flex-direction: column;
                display: none;
                text-align: center;
                padding: 20px 0;
            }
            .nav-links.active {
                display: flex;
            }
            .nav-links a:after {
                display: none;
            }
            h1 {
                font-size: 2rem;
            }
            .article-content {
                font-size: 16px;
                padding: 0 15px;
            }
            .article-content h2 {
                font-size: 1.6rem;
            }
            .article-content h3 {
                font-size: 1.4rem;
            }
            .footer-content {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 15px;
            }
            h1 {
                font-size: 1.8rem;
            }
            .article-meta {
                flex-direction: column;
                align-items: center;
                gap: 10px;
            }
            .download-cta {
                padding: 20px 15px;
            }
        }
        @media print {
            header, footer, .user-interaction, .breadcrumb {
                display: none;
            }
            body {
                background-color: white;
                color: black;
            }
            .article-content {
                max-width: 100%;
                font-size: 12pt;
            }
        }