* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary-color: #2c3e50;
            --secondary-color: #e74c3c;
            --accent-color: #3498db;
            --text-color: #333;
            --light-bg: #f8f9fa;
            --white: #ffffff;
            --shadow: 0 2px 10px rgba(0,0,0,0.1);
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: var(--light-bg);
        }
        .header {
            background: var(--primary-color);
            color: var(--white);
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .container {
            width: 90%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo {
            font-size: 2rem;
            font-weight: bold;
            color: var(--white);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i {
            color: var(--accent-color);
        }
        .nav {
            display: flex;
            gap: 2rem;
        }
        .nav a {
            color: var(--white);
            text-decoration: none;
            padding: 0.5rem 1rem;
            border-radius: 5px;
            transition: var(--transition);
        }
        .nav a:hover {
            background: var(--accent-color);
            transform: translateY(-2px);
        }
        .hamburger {
            display: none;
            flex-direction: column;
            cursor: pointer;
            gap: 4px;
        }
        .hamburger span {
            width: 25px;
            height: 3px;
            background: var(--white);
            transition: var(--transition);
        }
        .breadcrumb {
            background: var(--white);
            padding: 1rem 0;
            margin-bottom: 2rem;
            box-shadow: var(--shadow);
        }
        .breadcrumb-content {
            display: flex;
            gap: 0.5rem;
            align-items: center;
        }
        .breadcrumb a {
            color: var(--accent-color);
            text-decoration: none;
        }
        .breadcrumb span {
            color: #666;
        }
        .main-content {
            background: var(--white);
            padding: 2rem;
            border-radius: 10px;
            box-shadow: var(--shadow);
            margin-bottom: 2rem;
        }
        .article-header {
            text-align: center;
            margin-bottom: 3rem;
            padding-bottom: 2rem;
            border-bottom: 2px solid var(--light-bg);
        }
        .article-title {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        .article-meta {
            display: flex;
            justify-content: center;
            gap: 2rem;
            color: #666;
            font-size: 0.9rem;
        }
        .content-section {
            margin-bottom: 3rem;
        }
        .section-title {
            font-size: 1.8rem;
            color: var(--primary-color);
            margin-bottom: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--accent-color);
        }
        .subsection-title {
            font-size: 1.4rem;
            color: var(--secondary-color);
            margin: 2rem 0 1rem 0;
        }
        .content-text {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .highlight {
            background: #fff3cd;
            padding: 1rem;
            border-left: 4px solid var(--accent-color);
            margin: 1.5rem 0;
            border-radius: 0 5px 5px 0;
        }
        .content-image {
            width: 100%;
            max-width: 600px;
            height: auto;
            margin: 2rem auto;
            display: block;
            border-radius: 10px;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .content-image:hover {
            transform: scale(1.02);
        }
        .search-section {
            background: var(--light-bg);
            padding: 2rem;
            border-radius: 10px;
            margin: 2rem 0;
            text-align: center;
        }
        .search-form {
            display: flex;
            max-width: 500px;
            margin: 0 auto;
            gap: 10px;
        }
        .search-input {
            flex: 1;
            padding: 12px;
            border: 2px solid var(--accent-color);
            border-radius: 5px;
            font-size: 1rem;
        }
        .search-btn {
            background: var(--accent-color);
            color: var(--white);
            border: none;
            padding: 12px 24px;
            border-radius: 5px;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-btn:hover {
            background: var(--primary-color);
            transform: translateY(-2px);
        }
        .user-interaction {
            background: var(--light-bg);
            padding: 2rem;
            border-radius: 10px;
            margin: 3rem 0;
        }
        .rating-section, .comment-section {
            margin-bottom: 2rem;
        }
        .rating-stars {
            display: flex;
            gap: 5px;
            margin: 1rem 0;
        }
        .star {
            color: #ddd;
            cursor: pointer;
            font-size: 1.5rem;
            transition: var(--transition);
        }
        .star:hover, .star.active {
            color: #ffc107;
        }
        .comment-form {
            display: grid;
            gap: 1rem;
            margin-top: 1rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .form-input, .form-textarea {
            padding: 12px;
            border: 2px solid #ddd;
            border-radius: 5px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-input:focus, .form-textarea:focus {
            border-color: var(--accent-color);
            outline: none;
        }
        .submit-btn {
            background: var(--secondary-color);
            color: var(--white);
            border: none;
            padding: 12px 30px;
            border-radius: 5px;
            cursor: pointer;
            font-size: 1rem;
            transition: var(--transition);
            justify-self: start;
        }
        .submit-btn:hover {
            background: var(--primary-color);
            transform: translateY(-2px);
        }
        .footer-links {
            background: var(--primary-color);
            padding: 3rem 0;
            margin-top: 3rem;
        }
        .web-links-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin-bottom: 2rem;
        }
        .web-link {
            background: var(--white);
            padding: 1.5rem;
            border-radius: 8px;
            text-align: center;
            transition: var(--transition);
            box-shadow: var(--shadow);
        }
        .web-link:hover {
            transform: translateY(-5px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.2);
        }
        .web-link a {
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 600;
            display: block;
        }
        .footer {
            background: #1a252f;
            color: var(--white);
            text-align: center;
            padding: 2rem 0;
        }
        .copyright {
            margin-top: 1rem;
            font-size: 0.9rem;
            color: #bbb;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: flex;
            }
            .nav {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--primary-color);
                flex-direction: column;
                padding: 1rem;
                gap: 0;
            }
            .nav.active {
                display: flex;
            }
            .nav a {
                padding: 1rem;
                border-bottom: 1px solid rgba(255,255,255,0.1);
            }
            .article-title {
                font-size: 2rem;
            }
            .header-content {
                flex-wrap: wrap;
            }
            .search-form {
                flex-direction: column;
            }
            .article-meta {
                flex-direction: column;
                gap: 0.5rem;
            }
        }
        @media (max-width: 480px) {
            .container {
                width: 95%;
                padding: 0 10px;
            }
            .main-content {
                padding: 1rem;
            }
            .article-title {
                font-size: 1.6rem;
            }
            .section-title {
                font-size: 1.4rem;
            }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .fade-in {
            animation: fadeIn 0.6s ease-out;
        }
        @media print {
            .header, .footer-links, .user-interaction, .search-section {
                display: none;
            }
            body {
                background: white;
                color: black;
            }
            .main-content {
                box-shadow: none;
                padding: 0;
            }
        }