:root {
            --primary-color: #1e88e5;
            --secondary-color: #ff5722;
            --accent-color: #4caf50;
            --dark-color: #121212;
            --light-color: #f5f5f5;
            --text-color: #333;
            --text-light: #666;
            --shadow: 0 4px 12px rgba(0,0,0,0.1);
            --border-radius: 8px;
            --transition: all 0.3s ease;
            --container-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: 1.7;
            color: var(--text-color);
            background-color: #f9f9f9;
            overflow-x: hidden;
        }
        .container {
            width: 100%;
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .logo {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary-color);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i {
            color: var(--secondary-color);
        }
        .logo span {
            background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        .main-nav {
            display: flex;
            gap: 25px;
        }
        .main-nav a {
            text-decoration: none;
            color: var(--dark-color);
            font-weight: 600;
            padding: 8px 12px;
            border-radius: var(--border-radius);
            transition: var(--transition);
            position: relative;
        }
        .main-nav a:hover {
            color: var(--primary-color);
            background-color: rgba(30, 136, 229, 0.05);
        }
        .main-nav a.active {
            color: var(--primary-color);
        }
        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 12px;
            right: 12px;
            height: 3px;
            background-color: var(--primary-color);
            border-radius: 3px;
        }
        .search-form {
            display: flex;
            align-items: center;
            background: white;
            border-radius: 50px;
            padding: 5px 15px;
            border: 2px solid #e0e0e0;
            transition: var(--transition);
        }
        .search-form:focus-within {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(30, 136, 229, 0.2);
        }
        .search-form input {
            border: none;
            outline: none;
            padding: 8px;
            width: 200px;
            font-size: 0.95rem;
        }
        .search-form button {
            background: none;
            border: none;
            color: var(--primary-color);
            cursor: pointer;
            font-size: 1.1rem;
            padding: 5px;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--dark-color);
            cursor: pointer;
            padding: 5px;
        }
        .breadcrumb {
            background-color: #f0f0f0;
            padding: 12px 0;
            font-size: 0.9rem;
            border-bottom: 1px solid #ddd;
        }
        .breadcrumb a {
            color: var(--primary-color);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb span {
            color: var(--text-light);
            margin: 0 8px;
        }
        main {
            padding: 40px 0;
            background-color: white;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            margin: 20px auto;
            overflow: hidden;
        }
        article {
            padding: 0 30px;
        }
        h1, h2, h3, h4 {
            color: var(--dark-color);
            margin-bottom: 1.2rem;
            line-height: 1.3;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary-color);
            border-bottom: 3px solid var(--accent-color);
            padding-bottom: 15px;
            margin-bottom: 30px;
        }
        h2 {
            font-size: 2.2rem;
            margin-top: 40px;
            color: var(--secondary-color);
            padding-bottom: 10px;
            border-bottom: 2px dashed #eee;
        }
        h3 {
            font-size: 1.8rem;
            margin-top: 30px;
            color: var(--dark-color);
        }
        h4 {
            font-size: 1.4rem;
            margin-top: 25px;
            color: #555;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.3rem;
            font-weight: 500;
            color: var(--primary-color);
            background-color: rgba(30, 136, 229, 0.05);
            padding: 20px;
            border-radius: var(--border-radius);
            border-left: 5px solid var(--primary-color);
            margin-bottom: 30px;
        }
        .highlight {
            background-color: #fff9e6;
            padding: 25px;
            border-radius: var(--border-radius);
            border-left: 5px solid #ffc107;
            margin: 25px 0;
        }
        .highlight h3 {
            color: #d48806;
            margin-top: 0;
        }
        .featured-image {
            width: 100%;
            max-height: 500px;
            object-fit: cover;
            border-radius: var(--border-radius);
            margin: 30px 0;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .featured-image:hover {
            transform: scale(1.01);
            box-shadow: 0 8px 25px rgba(0,0,0,0.15);
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: var(--text-light);
            margin-top: -20px;
            margin-bottom: 30px;
            font-size: 0.95rem;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            margin-top: 40px;
        }
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
        }
        .main-content {
            grid-column: 1;
        }
        .sidebar {
            grid-column: 2;
        }
        @media (max-width: 992px) {
            .sidebar {
                grid-column: 1;
            }
        }
        .sidebar-card {
            background: #f8f9fa;
            border-radius: var(--border-radius);
            padding: 25px;
            margin-bottom: 30px;
            box-shadow: var(--shadow);
        }
        .sidebar-card h3 {
            font-size: 1.4rem;
            margin-top: 0;
            color: var(--primary-color);
            border-bottom: 2px solid #eee;
            padding-bottom: 10px;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 15px;
            margin: 20px 0;
        }
        .stat-item {
            text-align: center;
            padding: 15px;
            background: white;
            border-radius: var(--border-radius);
            box-shadow: 0 3px 10px rgba(0,0,0,0.05);
        }
        .stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary-color);
            display: block;
        }
        .stat-label {
            font-size: 0.9rem;
            color: var(--text-light);
        }
        .link-box {
            padding: 15px;
            background: white;
            border-radius: var(--border-radius);
            margin-bottom: 15px;
            border-left: 4px solid var(--accent-color);
            transition: var(--transition);
        }
        .link-box:hover {
            transform: translateX(5px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
        }
        .link-box a {
            color: var(--dark-color);
            text-decoration: none;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .link-box a:hover {
            color: var(--primary-color);
        }
        .link-box i {
            color: var(--accent-color);
        }
        ul, ol {
            margin-left: 25px;
            margin-bottom: 25px;
        }
        li {
            margin-bottom: 10px;
            font-size: 1.1rem;
        }
        .tip {
            background-color: #e8f5e9;
            border-left: 5px solid var(--accent-color);
            padding: 20px;
            margin: 25px 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .warning {
            background-color: #ffebee;
            border-left: 5px solid #f44336;
            padding: 20px;
            margin: 25px 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 8px;
        }
        .keyword {
            background-color: rgba(30, 136, 229, 0.1);
            padding: 2px 6px;
            border-radius: 4px;
            font-weight: 600;
            color: var(--primary-color);
        }
        .btn {
            display: inline-block;
            padding: 12px 28px;
            background-color: var(--primary-color);
            color: white;
            border: none;
            border-radius: 50px;
            font-weight: 600;
            cursor: pointer;
            text-decoration: none;
            transition: var(--transition);
            text-align: center;
            font-size: 1rem;
            box-shadow: 0 4px 10px rgba(30, 136, 229, 0.3);
        }
        .btn:hover {
            background-color: #1565c0;
            transform: translateY(-3px);
            box-shadow: 0 6px 15px rgba(30, 136, 229, 0.4);
        }
        .btn-secondary {
            background-color: var(--secondary-color);
            box-shadow: 0 4px 10px rgba(255, 87, 34, 0.3);
        }
        .btn-secondary:hover {
            background-color: #e64a19;
            box-shadow: 0 6px 15px rgba(255, 87, 34, 0.4);
        }
        .interactive-section {
            background: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
            border-radius: var(--border-radius);
            padding: 30px;
            margin: 40px 0;
            box-shadow: var(--shadow);
        }
        .rating-form, .comment-form {
            margin-top: 30px;
        }
        .rating-stars {
            display: flex;
            gap: 10px;
            margin: 15px 0;
            font-size: 2rem;
            color: #ffc107;
        }
        .star {
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover {
            transform: scale(1.2);
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: var(--dark-color);
        }
        .form-control {
            width: 100%;
            padding: 12px 15px;
            border: 2px solid #ddd;
            border-radius: var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-control:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(30, 136, 229, 0.2);
            outline: none;
        }
        textarea.form-control {
            min-height: 150px;
            resize: vertical;
            font-family: inherit;
        }
        .web-links {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
            padding: 40px 0;
            border-top: 1px solid #eee;
            border-bottom: 1px solid #eee;
            margin-bottom: 40px;
        }
        @media (max-width: 768px) {
            .web-links {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 480px) {
            .web-links {
                grid-template-columns: 1fr;
            }
        }
        .web-link {
            padding: 15px;
            background-color: #f8f9fa;
            border-radius: var(--border-radius);
            transition: var(--transition);
        }
        .web-link:hover {
            background-color: #e9ecef;
            transform: translateY(-5px);
        }
        .web-link a {
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 600;
            display: block;
            text-align: center;
        }
        .web-link a:hover {
            text-decoration: underline;
        }
        footer {
            background-color: var(--dark-color);
            color: white;
            padding: 40px 0 20px;
            margin-top: 60px;
        }
        .footer-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 30px;
        }
        .copyright {
            color: #aaa;
            font-size: 0.95rem;
        }
        .social-links {
            display: flex;
            gap: 20px;
        }
        .social-links a {
            color: white;
            font-size: 1.3rem;
            transition: var(--transition);
        }
        .social-links a:hover {
            color: var(--primary-color);
            transform: translateY(-3px);
        }
        @media (max-width: 768px) {
            .header-container {
                flex-wrap: wrap;
            }
            .hamburger {
                display: block;
                order: 1;
            }
            .logo {
                order: 0;
                font-size: 1.7rem;
            }
            .search-form {
                order: 2;
                width: 100%;
                margin-top: 15px;
                display: none;
            }
            .search-form.active {
                display: flex;
            }
            .main-nav {
                display: none;
                flex-direction: column;
                width: 100%;
                order: 3;
                margin-top: 20px;
                background: white;
                padding: 20px;
                border-radius: var(--border-radius);
                box-shadow: var(--shadow);
            }
            .main-nav.active {
                display: flex;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.5rem;
            }
            article {
                padding: 0 15px;
            }
            .content-grid {
                gap: 30px;
            }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .fade-in {
            animation: fadeIn 0.8s ease forwards;
        }
        @media print {
            header, .sidebar, .interactive-section, .web-links, footer {
                display: none;
            }
            body {
                background: white;
                color: black;
            }
            main {
                box-shadow: none;
                margin: 0;
                padding: 0;
            }
        }