:root {
            --primary-color: #2c3e50;
            --secondary-color: #1a5276;
            --accent-color: #e74c3c;
            --light-color: #ecf0f1;
            --dark-color: #2c3e50;
            --text-color: #333;
            --text-light: #7f8c8d;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
            --border-radius: 8px;
            --max-width: 1200px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: #f9f9f9;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        ul {
            list-style: none;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .btn {
            display: inline-block;
            background: var(--secondary-color);
            color: white;
            padding: 12px 24px;
            border-radius: var(--border-radius);
            font-weight: 600;
            cursor: pointer;
            border: none;
            transition: var(--transition);
        }
        .btn:hover {
            background: var(--primary-color);
            transform: translateY(-2px);
            box-shadow: var(--shadow);
        }
        header {
            background-color: var(--primary-color);
            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;
        }
        .logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i {
            color: var(--accent-color);
        }
        .logo span {
            color: var(--accent-color);
        }
        .search-form {
            display: flex;
            max-width: 400px;
            width: 100%;
        }
        .search-input {
            flex: 1;
            padding: 12px 15px;
            border: none;
            border-radius: var(--border-radius) 0 0 var(--border-radius);
            font-size: 1rem;
        }
        .search-btn {
            background: var(--accent-color);
            color: white;
            border: none;
            padding: 0 20px;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-btn:hover {
            background: #c0392b;
        }
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        nav {
            background-color: var(--secondary-color);
            padding: 10px 0;
        }
        .nav-list {
            display: flex;
            justify-content: center;
            gap: 30px;
        }
        .nav-link {
            color: white;
            font-weight: 600;
            padding: 8px 12px;
            border-radius: var(--border-radius);
            transition: var(--transition);
        }
        .nav-link:hover, .nav-link.active {
            background-color: rgba(255, 255, 255, 0.1);
            color: var(--light-color);
        }
        .breadcrumb {
            background-color: var(--light-color);
            padding: 12px 0;
            font-size: 0.9rem;
            color: var(--text-light);
        }
        .breadcrumb a:hover {
            color: var(--accent-color);
        }
        .separator {
            margin: 0 8px;
        }
        main {
            flex: 1;
            padding: 40px 0;
        }
        article {
            background: white;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            padding: 40px;
            margin-bottom: 40px;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary-color);
            margin-bottom: 20px;
            line-height: 1.2;
        }
        h2 {
            font-size: 2rem;
            color: var(--secondary-color);
            margin: 30px 0 15px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--light-color);
        }
        h3 {
            font-size: 1.5rem;
            color: var(--dark-color);
            margin: 25px 0 10px;
        }
        p {
            margin-bottom: 20px;
            text-align: justify;
        }
        .lead {
            font-size: 1.2rem;
            font-weight: 500;
            color: var(--secondary-color);
            margin-bottom: 30px;
        }
        .highlight {
            background-color: #fffde7;
            border-left: 4px solid #f1c40f;
            padding: 20px;
            margin: 25px 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .featured-image {
            margin: 30px auto;
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            max-width: 800px;
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: var(--text-light);
            margin-top: 10px;
            font-size: 0.9rem;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
            margin: 30px 0;
        }
        .stat-card {
            background: var(--light-color);
            padding: 25px;
            border-radius: var(--border-radius);
            text-align: center;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .stat-card:hover {
            transform: translateY(-5px);
        }
        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--accent-color);
            display: block;
            line-height: 1;
        }
        .stat-label {
            font-size: 1rem;
            color: var(--text-color);
            margin-top: 10px;
        }
        .strategy-tips {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 20px;
            margin: 30px 0;
        }
        .tip-card {
            background: white;
            border: 1px solid #ddd;
            border-radius: var(--border-radius);
            padding: 20px;
            transition: var(--transition);
        }
        .tip-card:hover {
            border-color: var(--accent-color);
            box-shadow: var(--shadow);
        }
        .tip-icon {
            font-size: 2rem;
            color: var(--secondary-color);
            margin-bottom: 15px;
        }
        .quote {
            font-size: 1.2rem;
            font-style: italic;
            color: var(--secondary-color);
            text-align: center;
            max-width: 800px;
            margin: 40px auto;
            padding: 30px;
            border-top: 1px solid #eee;
            border-bottom: 1px solid #eee;
        }
        .author {
            display: block;
            margin-top: 15px;
            font-weight: bold;
            color: var(--text-color);
        }
        .interactive-section {
            background: #f8f9fa;
            border-radius: var(--border-radius);
            padding: 30px;
            margin: 40px 0;
        }
        .rating-form, .comment-form {
            max-width: 600px;
            margin: 30px 0;
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
        }
        .form-input, .form-textarea {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid #ddd;
            border-radius: var(--border-radius);
            font-family: inherit;
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-input:focus, .form-textarea:focus {
            outline: none;
            border-color: var(--secondary-color);
            box-shadow: 0 0 0 3px rgba(26, 82, 118, 0.1);
        }
        .form-textarea {
            min-height: 150px;
            resize: vertical;
        }
        .stars {
            display: flex;
            gap: 10px;
            margin: 10px 0;
        }
        .star {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover,
        .star.active {
            color: #f1c40f;
        }
        .footer-links {
            background: var(--light-color);
            padding: 40px 0;
        }
        .web-link {
            margin-bottom: 15px;
        }
        .web-link a {
            color: var(--secondary-color);
            font-weight: 500;
            transition: var(--transition);
        }
        .web-link a:hover {
            color: var(--accent-color);
            padding-left: 5px;
        }
        footer {
            background-color: var(--dark-color);
            color: white;
            padding: 40px 0 20px;
            text-align: center;
        }
        .footer-content {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 20px;
        }
        .social-links {
            display: flex;
            gap: 20px;
            margin: 20px 0;
        }
        .social-link {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            transition: var(--transition);
        }
        .social-link:hover {
            background: var(--accent-color);
            transform: translateY(-3px);
        }
        .copyright {
            margin-top: 20px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            width: 100%;
            font-size: 0.9rem;
            color: #bbb;
        }
        @media (max-width: 992px) {
            h1 {
                font-size: 2.4rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            article {
                padding: 30px;
            }
        }
        @media (max-width: 768px) {
            .header-top {
                flex-wrap: wrap;
            }
            .search-form {
                order: 3;
                margin-top: 15px;
                max-width: 100%;
            }
            .menu-toggle {
                display: block;
            }
            nav {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: var(--secondary-color);
                box-shadow: var(--shadow);
            }
            nav.active {
                display: block;
            }
            .nav-list {
                flex-direction: column;
                gap: 0;
                padding: 10px 0;
            }
            .nav-link {
                display: block;
                padding: 15px 20px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            }
            .nav-link:last-child {
                border-bottom: none;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .strategy-tips {
                grid-template-columns: 1fr;
            }
            article {
                padding: 20px;
            }
        }
        @media (max-width: 576px) {
            h1 {
                font-size: 2rem;
            }
            .lead {
                font-size: 1.1rem;
            }
            .btn {
                padding: 10px 20px;
            }
        }