* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary-color: #2c3e50;
            --secondary-color: #e74c3c;
            --accent-color: #f39c12;
            --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);
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: var(--primary-color);
            color: var(--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;
        }
        .logo {
            font-size: 1.8rem;
            font-weight: bold;
            color: var(--white);
            text-decoration: none;
        }
        .logo span {
            color: var(--accent-color);
        }
        .search-form {
            display: flex;
            max-width: 400px;
            width: 100%;
        }
        .search-input {
            flex: 1;
            padding: 10px 15px;
            border: none;
            border-radius: 4px 0 0 4px;
            font-size: 1rem;
        }
        .search-btn {
            background: var(--secondary-color);
            color: white;
            border: none;
            padding: 10px 15px;
            border-radius: 0 4px 4px 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-btn:hover {
            background: #c0392b;
        }
        nav {
            background-color: #34495e;
        }
        .nav-menu {
            display: flex;
            list-style: none;
        }
        .nav-menu li {
            position: relative;
        }
        .nav-menu a {
            display: block;
            padding: 15px 20px;
            color: var(--white);
            text-decoration: none;
            transition: var(--transition);
        }
        .nav-menu a:hover {
            background-color: var(--secondary-color);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
        }
        .breadcrumb {
            padding: 15px 0;
            background-color: var(--white);
            box-shadow: 0 1px 3px rgba(0,0,0,0.1);
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
        }
        .breadcrumb li {
            margin-right: 10px;
        }
        .breadcrumb li:not(:last-child)::after {
            content: "›";
            margin-left: 10px;
            color: #777;
        }
        .breadcrumb a {
            color: var(--primary-color);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        main {
            padding: 30px 0;
        }
        .article-header {
            margin-bottom: 30px;
            text-align: center;
        }
        .article-header h1 {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 15px;
        }
        .article-meta {
            display: flex;
            justify-content: center;
            gap: 20px;
            color: #777;
            font-size: 0.9rem;
        }
        .article-content {
            background: var(--white);
            padding: 30px;
            border-radius: 8px;
            box-shadow: var(--shadow);
        }
        .article-section {
            margin-bottom: 40px;
        }
        .article-section h2 {
            font-size: 1.8rem;
            color: var(--primary-color);
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--accent-color);
        }
        .article-section h3 {
            font-size: 1.4rem;
            color: var(--secondary-color);
            margin: 25px 0 15px;
        }
        .article-section p {
            margin-bottom: 15px;
            text-align: justify;
        }
        .highlight {
            background-color: #fff9e6;
            padding: 15px;
            border-left: 4px solid var(--accent-color);
            margin: 20px 0;
        }
        .tips-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 20px;
            margin: 25px 0;
        }
        .tip-card {
            background: var(--light-bg);
            padding: 20px;
            border-radius: 8px;
            box-shadow: 0 2px 5px rgba(0,0,0,0.05);
            transition: var(--transition);
        }
        .tip-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        .tip-card i {
            color: var(--accent-color);
            font-size: 1.5rem;
            margin-bottom: 10px;
        }
        .article-image {
            width: 100%;
            max-width: 800px;
            margin: 25px auto;
            text-align: center;
        }
        .article-image img {
            width: 100%;
            height: auto;
            border-radius: 8px;
            box-shadow: var(--shadow);
        }
        .image-caption {
            margin-top: 10px;
            font-style: italic;
            color: #777;
        }
        .interactive-section {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 40px;
            border-radius: 8px;
            margin: 40px 0;
            text-align: center;
        }
        .rating-section {
            background: var(--white);
            padding: 25px;
            border-radius: 8px;
            margin: 30px 0;
            box-shadow: var(--shadow);
        }
        .rating-stars {
            display: flex;
            justify-content: center;
            gap: 5px;
            margin: 15px 0;
        }
        .star {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover,
        .star.active {
            color: var(--accent-color);
        }
        .comment-form {
            margin-top: 30px;
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: bold;
        }
        .form-control {
            width: 100%;
            padding: 12px;
            border: 1px solid #ddd;
            border-radius: 4px;
            font-size: 1rem;
        }
        textarea.form-control {
            min-height: 150px;
            resize: vertical;
        }
        .btn {
            display: inline-block;
            background: var(--secondary-color);
            color: white;
            padding: 12px 25px;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            font-size: 1rem;
            transition: var(--transition);
        }
        .btn:hover {
            background: #c0392b;
            transform: translateY(-2px);
        }
        .footer-links {
            background: var(--primary-color);
            color: white;
            padding: 40px 0;
        }
        .web-links-container {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 15px;
            margin-bottom: 30px;
        }
        .web-link {
            background: rgba(255,255,255,0.1);
            padding: 15px;
            border-radius: 4px;
            transition: var(--transition);
        }
        .web-link:hover {
            background: rgba(255,255,255,0.2);
            transform: translateX(5px);
        }
        .web-link a {
            color: white;
            text-decoration: none;
        }
        footer {
            background: #2c3e50;
            color: white;
            text-align: center;
            padding: 20px 0;
        }
        .copyright {
            font-size: 0.9rem;
            opacity: 0.8;
        }
        @media (max-width: 768px) {
            .header-top {
                flex-direction: column;
                gap: 15px;
            }
            .search-form {
                max-width: 100%;
            }
            .hamburger {
                display: block;
                position: absolute;
                top: 15px;
                right: 20px;
            }
            .nav-menu {
                display: none;
                flex-direction: column;
                width: 100%;
            }
            .nav-menu.active {
                display: flex;
            }
            .article-header h1 {
                font-size: 2rem;
            }
            .article-content {
                padding: 20px;
            }
            .tips-grid {
                grid-template-columns: 1fr;
            }
            .interactive-section {
                padding: 25px;
            }
        }
        @media (max-width: 480px) {
            .article-header h1 {
                font-size: 1.6rem;
            }
            .article-section h2 {
                font-size: 1.5rem;
            }
            .article-section h3 {
                font-size: 1.2rem;
            }
            .rating-stars {
                gap: 3px;
            }
            .star {
                font-size: 1.5rem;
            }
        }