* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', 'Nirmala UI', Arial, sans-serif;
        }
        :root {
            --primary: #2c3e50;
            --secondary: #1a5276;
            --accent: #e74c3c;
            --light: #ecf0f1;
            --dark: #2c3e50;
            --text: #333;
            --text-light: #555;
            --shadow: 0 4px 12px rgba(0,0,0,0.1);
            --border-radius: 8px;
            --transition: all 0.3s ease;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            color: var(--text);
            background-color: #f9f9f9;
            line-height: 1.7;
            font-size: 18px;
        }
        h1, h2, h3, h4 {
            color: var(--primary);
            margin-bottom: 1rem;
            line-height: 1.3;
        }
        h1 {
            font-size: 2.8rem;
            border-left: 6px solid var(--accent);
            padding-left: 20px;
            margin-top: 2rem;
        }
        h2 {
            font-size: 2.2rem;
            border-bottom: 2px solid var(--light);
            padding-bottom: 10px;
            margin-top: 2.5rem;
        }
        h3 {
            font-size: 1.8rem;
            color: var(--secondary);
            margin-top: 2rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        strong {
            color: var(--secondary);
            font-weight: 700;
        }
        em {
            color: var(--accent);
            font-style: italic;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: var(--primary);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: white;
            text-decoration: none;
            display: flex;
            align-items: center;
        }
        .logo i {
            color: var(--accent);
            margin-right: 10px;
        }
        nav ul {
            display: flex;
            list-style: none;
        }
        nav li {
            margin-left: 2rem;
        }
        nav a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
            padding: 8px 12px;
            border-radius: var(--border-radius);
            transition: var(--transition);
        }
        nav a:hover, nav a.active {
            background-color: var(--accent);
            color: white;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: white;
        }
        .breadcrumb {
            background-color: var(--light);
            padding: 12px 0;
            margin-bottom: 2rem;
            font-size: 0.95rem;
        }
        .breadcrumb a {
            color: var(--secondary);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb span {
            color: var(--text-light);
        }
        main {
            padding: 2rem 0;
            background-color: white;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            margin-bottom: 3rem;
        }
        .article-content {
            padding: 0 2rem;
        }
        .search-container {
            background: linear-gradient(135deg, var(--secondary), #3498db);
            padding: 2.5rem;
            border-radius: var(--border-radius);
            margin: 2rem 0;
            text-align: center;
            color: white;
        }
        .search-box {
            display: flex;
            max-width: 600px;
            margin: 1.5rem auto 0;
        }
        .search-box input {
            flex: 1;
            padding: 18px 20px;
            border: none;
            border-radius: var(--border-radius) 0 0 var(--border-radius);
            font-size: 1.1rem;
        }
        .search-box button {
            background-color: var(--accent);
            color: white;
            border: none;
            padding: 0 30px;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            cursor: pointer;
            font-size: 1.2rem;
            transition: var(--transition);
        }
        .search-box button:hover {
            background-color: #c0392b;
        }
        .scoring-chart {
            background-color: #f8f9fa;
            border: 2px solid #ddd;
            border-radius: var(--border-radius);
            padding: 2rem;
            margin: 3rem 0;
            overflow-x: auto;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
            font-size: 1.1rem;
        }
        th {
            background-color: var(--secondary);
            color: white;
            padding: 18px 15px;
            text-align: left;
        }
        td {
            padding: 15px;
            border-bottom: 1px solid #ddd;
        }
        tr:hover {
            background-color: #e3f2fd;
        }
        .article-image {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: var(--border-radius);
            margin: 2rem auto;
            display: block;
            box-shadow: var(--shadow);
        }
        .interactive-box {
            background-color: #e8f4fc;
            border-left: 5px solid var(--secondary);
            padding: 1.8rem;
            margin: 2.5rem 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .tip {
            background-color: #fff8e1;
            border-left: 5px solid #ffc107;
            padding: 1.5rem;
            margin: 2rem 0;
        }
        .user-interaction {
            background-color: #f5f5f5;
            padding: 2.5rem;
            border-radius: var(--border-radius);
            margin: 3rem 0;
        }
        .form-group {
            margin-bottom: 1.8rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: var(--primary);
        }
        input, textarea, select {
            width: 100%;
            padding: 15px;
            border: 2px solid #ddd;
            border-radius: var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        input:focus, textarea:focus, select:focus {
            border-color: var(--secondary);
            outline: none;
        }
        button[type="submit"] {
            background-color: var(--secondary);
            color: white;
            border: none;
            padding: 16px 40px;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-size: 1.1rem;
            font-weight: 600;
            transition: var(--transition);
        }
        button[type="submit"]:hover {
            background-color: var(--primary);
            transform: translateY(-3px);
            box-shadow: 0 6px 12px rgba(0,0,0,0.15);
        }
        .rating {
            display: flex;
            align-items: center;
            gap: 10px;
            margin: 1.5rem 0;
        }
        .star {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover, .star.active {
            color: #ffc107;
        }
        .long-tail-links {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 20px;
            margin: 3rem 0;
        }
        .web-link {
            background-color: white;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            box-shadow: 0 3px 8px rgba(0,0,0,0.08);
            transition: var(--transition);
        }
        .web-link:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 16px rgba(0,0,0,0.12);
        }
        .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(--primary);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-container {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .copyright {
            width: 100%;
            text-align: center;
            margin-top: 3rem;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 0.95rem;
            color: #bbb;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.4rem; }
            h2 { font-size: 2rem; }
            .header-container { padding: 0 15px; }
            nav ul { display: none; }
            .hamburger { display: block; }
            .mobile-nav {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background-color: var(--primary);
                padding: 1rem 0;
                box-shadow: var(--shadow);
            }
            .mobile-nav.active { display: flex; }
            .mobile-nav li { margin: 0; }
            .mobile-nav a { display: block; padding: 15px 20px; border-bottom: 1px solid rgba(255,255,255,0.1); }
            .article-content { padding: 0 1rem; }
            .footer-container { flex-direction: column; }
        }
        @media (max-width: 768px) {
            body { font-size: 16px; }
            h1 { font-size: 2rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.5rem; }
            .search-container { padding: 1.5rem; }
            .search-box { flex-direction: column; }
            .search-box input { border-radius: var(--border-radius); margin-bottom: 10px; }
            .search-box button { border-radius: var(--border-radius); padding: 15px; }
            .long-tail-links { grid-template-columns: 1fr; }
        }
        @media print {
            header, footer, .search-container, .user-interaction { display: none; }
            body { font-size: 12pt; background: white; }
            main { box-shadow: none; }
        }