* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', 'Nirmala UI', 'Arial', sans-serif;
        }
        :root {
            --primary: #2c3e50;
            --secondary: #3498db;
            --accent: #e74c3c;
            --light: #ecf0f1;
            --dark: #1a252f;
            --text: #2c3e50;
            --text-light: #7f8c8d;
            --success: #27ae60;
            --border: #bdc3c7;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --radius: 8px;
            --transition: all 0.3s ease;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: #f9f9f9;
            color: var(--text);
            line-height: 1.8;
            overflow-x: hidden;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: var(--primary);
            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 a {
            color: white;
            text-decoration: none;
            font-size: 2rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i {
            color: var(--secondary);
        }
        .logo span {
            color: var(--accent);
        }
        .desktop-nav ul {
            display: flex;
            list-style: none;
            gap: 25px;
        }
        .desktop-nav a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.05rem;
            padding: 8px 12px;
            border-radius: var(--radius);
            transition: var(--transition);
        }
        .desktop-nav a:hover {
            background-color: var(--secondary);
            color: white;
        }
        .mobile-nav-toggle {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .mobile-nav {
            display: none;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            background-color: var(--primary);
            padding: 20px;
            box-shadow: var(--shadow);
            border-top: 2px solid var(--secondary);
        }
        .mobile-nav.active {
            display: block;
        }
        .mobile-nav ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 15px;
        }
        .mobile-nav a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            display: block;
            padding: 12px;
            border-radius: var(--radius);
            transition: var(--transition);
        }
        .mobile-nav a:hover {
            background-color: var(--secondary);
        }
        .breadcrumb {
            background-color: var(--light);
            padding: 12px 0;
            margin-bottom: 30px;
            border-bottom: 1px solid var(--border);
        }
        .breadcrumb ul {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 10px;
        }
        .breadcrumb li {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-light);
            font-size: 0.95rem;
        }
        .breadcrumb a {
            color: var(--secondary);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb i {
            font-size: 0.8rem;
        }
        main {
            padding: 30px 0;
        }
        article {
            background-color: white;
            padding: 40px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            margin-bottom: 40px;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary);
            margin-bottom: 20px;
            line-height: 1.3;
            border-left: 6px solid var(--accent);
            padding-left: 20px;
        }
        h2 {
            font-size: 2rem;
            color: var(--primary);
            margin: 40px 0 20px;
            padding-bottom: 10px;
            border-bottom: 3px solid var(--secondary);
        }
        h3 {
            font-size: 1.6rem;
            color: var(--dark);
            margin: 30px 0 15px;
        }
        h4 {
            font-size: 1.3rem;
            color: var(--text);
            margin: 20px 0 10px;
        }
        p {
            margin-bottom: 20px;
            font-size: 1.1rem;
            text-align: justify;
        }
        strong {
            color: var(--dark);
            font-weight: 700;
        }
        em {
            color: var(--accent);
            font-style: italic;
        }
        .highlight {
            background-color: #fffacd;
            padding: 25px;
            border-radius: var(--radius);
            border-left: 5px solid var(--success);
            margin: 30px 0;
        }
        .highlight p {
            margin-bottom: 0;
        }
        .stats-box {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
            margin: 30px 0;
        }
        .stat {
            background: linear-gradient(135deg, var(--secondary), #2980b9);
            color: white;
            padding: 25px;
            border-radius: var(--radius);
            text-align: center;
            box-shadow: var(--shadow);
        }
        .stat h3 {
            color: white;
            font-size: 2.5rem;
            margin: 0 0 10px;
        }
        .stat p {
            margin: 0;
            font-size: 1.1rem;
            opacity: 0.9;
        }
        .image-wrapper {
            margin: 40px 0;
            text-align: center;
        }
        .image-wrapper img {
            max-width: 100%;
            height: auto;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            border: 5px solid white;
        }
        figcaption {
            margin-top: 10px;
            font-style: italic;
            color: var(--text-light);
            font-size: 0.95rem;
        }
        .download-section {
            background: linear-gradient(to right, #1a2980, #26d0ce);
            color: white;
            padding: 30px;
            border-radius: var(--radius);
            text-align: center;
            margin: 40px 0;
        }
        .download-btn {
            display: inline-block;
            background-color: white;
            color: var(--primary);
            padding: 15px 40px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 700;
            font-size: 1.2rem;
            margin-top: 20px;
            transition: var(--transition);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
        }
        .download-btn:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
            color: var(--accent);
        }
        .search-box {
            background-color: var(--light);
            padding: 30px;
            border-radius: var(--radius);
            margin: 40px 0;
            text-align: center;
        }
        .search-form {
            display: flex;
            max-width: 600px;
            margin: 20px auto 0;
        }
        .search-input {
            flex: 1;
            padding: 15px 20px;
            border: 2px solid var(--border);
            border-right: none;
            border-radius: 50px 0 0 50px;
            font-size: 1.1rem;
            outline: none;
        }
        .search-btn {
            background-color: var(--secondary);
            color: white;
            border: none;
            padding: 0 30px;
            border-radius: 0 50px 50px 0;
            cursor: pointer;
            font-size: 1.1rem;
            font-weight: 600;
            transition: var(--transition);
        }
        .search-btn:hover {
            background-color: #2980b9;
        }
        .user-interaction {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin: 50px 0;
        }
        .comment-box, .rating-box {
            background-color: white;
            padding: 30px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .rating-stars {
            display: flex;
            justify-content: center;
            gap: 10px;
            margin: 20px 0;
            font-size: 2rem;
            color: #ffc107;
        }
        .rating-stars i {
            cursor: pointer;
            transition: var(--transition);
        }
        .rating-stars i:hover {
            transform: scale(1.2);
        }
        textarea, input[type="text"], input[type="email"] {
            width: 100%;
            padding: 15px;
            margin-bottom: 15px;
            border: 2px solid var(--border);
            border-radius: var(--radius);
            font-size: 1rem;
            resize: vertical;
        }
        .submit-btn {
            background-color: var(--secondary);
            color: white;
            border: none;
            padding: 15px 30px;
            border-radius: var(--radius);
            cursor: pointer;
            font-size: 1.1rem;
            font-weight: 600;
            transition: var(--transition);
            width: 100%;
        }
        .submit-btn:hover {
            background-color: #2980b9;
        }
        .longtail-links {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 20px;
            margin: 50px 0;
        }
        .web-link {
            background-color: white;
            padding: 20px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .web-link:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
        }
        .web-link a {
            color: var(--secondary);
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
            display: block;
        }
        .web-link a:hover {
            color: var(--accent);
            text-decoration: underline;
        }
        footer {
            background-color: var(--dark);
            color: white;
            padding: 50px 0 20px;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 15px;
        }
        .footer-logo span {
            color: var(--accent);
        }
        .footer-about p {
            color: #bdc3c7;
            font-size: 1rem;
        }
        .social-links {
            display: flex;
            gap: 15px;
            margin-top: 20px;
        }
        .social-links a {
            color: white;
            background-color: #34495e;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            transition: var(--transition);
        }
        .social-links a:hover {
            background-color: var(--secondary);
            transform: scale(1.1);
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid #34495e;
            color: #95a5a6;
            font-size: 0.95rem;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.4rem; }
            h2 { font-size: 1.8rem; }
            .desktop-nav { display: none; }
            .mobile-nav-toggle { display: block; }
            article { padding: 30px; }
        }
        @media (max-width: 768px) {
            h1 { font-size: 2rem; }
            h2 { font-size: 1.6rem; }
            .header-container { padding: 12px 0; }
            .stat h3 { font-size: 2rem; }
            .search-form { flex-direction: column; }
            .search-input {
                border-radius: 50px;
                border-right: 2px solid var(--border);
                margin-bottom: 10px;
            }
            .search-btn {
                border-radius: 50px;
                padding: 15px;
            }
            .user-interaction {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 480px) {
            h1 { font-size: 1.8rem; }
            .container { padding: 0 15px; }
            article { padding: 20px; }
            .download-btn { padding: 12px 30px; }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        article, .search-box, .user-interaction, .longtail-links {
            animation: fadeIn 0.8s ease-out;
        }
        @media print {
            header, .search-box, .user-interaction, .longtail-links, footer {
                display: none;
            }
            article {
                box-shadow: none;
                padding: 0;
            }
            .download-section {
                background: none;
                color: black;
                padding: 0;
            }
            .download-btn { display: none; }
        }