* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        :root {
            --primary-color: #ff6b35;
            --secondary-color: #004e89;
            --accent-color: #00a896;
            --dark-color: #1a1a2e;
            --light-color: #f8f9fa;
            --gray-color: #6c757d;
            --success-color: #28a745;
            --warning-color: #ffc107;
            --danger-color: #dc3545;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
            --border-radius: 8px;
            --max-width: 1200px;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: #f5f7fa;
            color: #333;
            line-height: 1.6;
            overflow-x: hidden;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a {
            text-decoration: none;
            color: var(--secondary-color);
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-color);
        }
        ul, ol {
            list-style-position: inside;
            margin-left: 1.5rem;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--border-radius);
        }
        button, input, textarea {
            font-family: inherit;
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .section {
            padding: 60px 0;
        }
        .text-center {
            text-align: center;
        }
        .mb-1 { margin-bottom: 0.5rem; }
        .mb-2 { margin-bottom: 1rem; }
        .mb-3 { margin-bottom: 1.5rem; }
        .mb-4 { margin-bottom: 2rem; }
        .mt-4 { margin-top: 2rem; }
        .p-3 { padding: 1.5rem; }
        .site-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 20px;
        }
        .logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary-color);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo span {
            color: var(--secondary-color);
        }
        .logo:hover {
            color: var(--primary-color);
        }
        .main-nav ul {
            display: flex;
            gap: 25px;
        }
        .main-nav a {
            font-weight: 600;
            color: var(--dark-color);
            padding: 5px 0;
            position: relative;
        }
        .main-nav a:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--primary-color);
            transition: var(--transition);
        }
        .main-nav a:hover:after {
            width: 100%;
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            background: none;
            border: none;
            color: var(--dark-color);
            cursor: pointer;
        }
        .breadcrumb {
            background-color: #e9ecef;
            padding: 12px 20px;
            font-size: 0.9rem;
        }
        .breadcrumb ul {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            margin: 0;
        }
        .breadcrumb li:not(:last-child):after {
            content: '/';
            margin: 0 8px;
            color: var(--gray-color);
        }
        .breadcrumb a {
            color: var(--secondary-color);
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .search-section {
            background: linear-gradient(135deg, var(--secondary-color), #0077b6);
            color: white;
            padding: 30px 0;
        }
        .search-box {
            max-width: 600px;
            margin: 0 auto;
        }
        .search-form {
            display: flex;
            gap: 10px;
        }
        .search-input {
            flex: 1;
            padding: 15px 20px;
            border: none;
            border-radius: 50px;
            font-size: 1rem;
            box-shadow: var(--shadow);
        }
        .search-btn {
            background-color: var(--primary-color);
            color: white;
            border: none;
            border-radius: 50px;
            padding: 0 30px;
            cursor: pointer;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
        }
        .search-btn:hover {
            background-color: #e55a2b;
            transform: translateY(-2px);
        }
        .main-content {
            flex: 1;
            background-color: white;
            padding: 40px 20px;
            box-shadow: 0 0 15px rgba(0,0,0,0.05);
            border-radius: var(--border-radius);
            margin: 30px auto;
            width: 95%;
            max-width: var(--max-width);
        }
        .article-header {
            margin-bottom: 40px;
            border-bottom: 2px solid #eee;
            padding-bottom: 20px;
        }
        .article-header h1 {
            font-size: 2.8rem;
            color: var(--dark-color);
            line-height: 1.2;
            margin-bottom: 15px;
        }
        .meta-info {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            color: var(--gray-color);
            font-size: 0.9rem;
        }
        .meta-info i {
            margin-right: 5px;
        }
        .content-section {
            margin-bottom: 50px;
        }
        h2 {
            font-size: 2rem;
            color: var(--secondary-color);
            margin: 30px 0 20px;
            padding-bottom: 10px;
            border-bottom: 1px dashed #ccc;
        }
        h3 {
            font-size: 1.5rem;
            color: var(--primary-color);
            margin: 25px 0 15px;
        }
        p {
            margin-bottom: 1.2rem;
            font-size: 1.1rem;
            line-height: 1.8;
        }
        .lead {
            font-size: 1.3rem;
            font-weight: 500;
            color: var(--secondary-color);
            background-color: #f0f8ff;
            padding: 20px;
            border-left: 4px solid var(--accent-color);
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            margin: 25px 0;
        }
        .highlight {
            background-color: #fff3cd;
            border-left: 4px solid var(--warning-color);
            padding: 15px;
            margin: 20px 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        .featured-image {
            margin: 30px auto;
            max-width: 800px;
            box-shadow: var(--shadow);
            border: 5px solid white;
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: var(--gray-color);
            margin-top: 10px;
            font-size: 0.9rem;
        }
        .stats-box {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
            margin: 30px 0;
        }
        .stat-card {
            background: linear-gradient(145deg, #ffffff, #f0f0f0);
            border-radius: var(--border-radius);
            padding: 25px;
            text-align: center;
            box-shadow: var(--shadow);
            border-top: 5px solid var(--accent-color);
        }
        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary-color);
            display: block;
            line-height: 1;
        }
        .stat-label {
            color: var(--gray-color);
            font-size: 0.9rem;
            margin-top: 10px;
        }
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            margin: 30px 0;
            box-shadow: 0 0 10px rgba(0,0,0,0.05);
        }
        .comparison-table th, .comparison-table td {
            border: 1px solid #dee2e6;
            padding: 15px;
            text-align: left;
        }
        .comparison-table th {
            background-color: var(--secondary-color);
            color: white;
            font-weight: 600;
        }
        .comparison-table tr:nth-child(even) {
            background-color: #f8f9fa;
        }
        .comparison-table tr:hover {
            background-color: #e9ecef;
        }
        .interactive-accordion {
            margin: 30px 0;
        }
        .accordion-item {
            border: 1px solid #ddd;
            border-radius: var(--border-radius);
            margin-bottom: 10px;
            overflow: hidden;
        }
        .accordion-header {
            padding: 18px 20px;
            background-color: #f8f9fa;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            transition: var(--transition);
        }
        .accordion-header:hover {
            background-color: #e9ecef;
        }
        .accordion-header.active {
            background-color: var(--secondary-color);
            color: white;
        }
        .accordion-content {
            padding: 0 20px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out, padding 0.3s ease;
        }
        .accordion-content.active {
            padding: 20px;
            max-height: 1000px;
        }
        .tip-box {
            background-color: #d4edda;
            border: 1px solid #c3e6cb;
            color: #155724;
            padding: 20px;
            border-radius: var(--border-radius);
            margin: 20px 0;
            display: flex;
            align-items: flex-start;
            gap: 15px;
        }
        .tip-icon {
            color: var(--success-color);
            font-size: 1.5rem;
            flex-shrink: 0;
        }
        .user-interaction {
            background-color: #f8f9fa;
            border-radius: var(--border-radius);
            padding: 40px;
            margin: 50px 0;
            border: 1px solid #dee2e6;
        }
        .interaction-title {
            text-align: center;
            margin-bottom: 30px;
            color: var(--secondary-color);
        }
        .form-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: var(--dark-color);
        }
        .form-control {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid #ced4da;
            border-radius: var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-control:focus {
            border-color: var(--primary-color);
            outline: none;
            box-shadow: 0 0 0 0.2rem rgba(255, 107, 53, 0.25);
        }
        textarea.form-control {
            min-height: 120px;
            resize: vertical;
        }
        .rating-stars {
            display: flex;
            gap: 5px;
            margin: 10px 0;
            direction: ltr;
        }
        .star {
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover,
        .star.active {
            color: var(--warning-color);
        }
        .btn-submit {
            background-color: var(--primary-color);
            color: white;
            border: none;
            border-radius: var(--border-radius);
            padding: 15px 30px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .btn-submit:hover {
            background-color: #e55a2b;
            transform: translateY(-3px);
            box-shadow: 0 7px 14px rgba(255, 107, 53, 0.2);
        }
        .longtail-links {
            background-color: var(--dark-color);
            color: white;
            padding: 40px 20px;
        }
        .longtail-container {
            max-width: var(--max-width);
            margin: 0 auto;
        }
        .web-link {
            display: inline-block;
            margin: 10px 15px;
            padding: 8px 15px;
            background-color: rgba(255,255,255,0.1);
            border-radius: 30px;
            transition: var(--transition);
        }
        .web-link a {
            color: #ddd;
        }
        .web-link:hover {
            background-color: rgba(255,255,255,0.2);
            transform: translateY(-3px);
        }
        .web-link:hover a {
            color: white;
        }
        .site-footer {
            background-color: #1a1a2e;
            color: #aaa;
            padding: 40px 20px 20px;
        }
        .footer-container {
            max-width: var(--max-width);
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
        }
        .footer-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: white;
            margin-bottom: 15px;
            display: block;
        }
        .footer-about p {
            font-size: 0.95rem;
            margin-bottom: 20px;
        }
        .footer-links h4 {
            color: white;
            margin-bottom: 20px;
            font-size: 1.2rem;
        }
        .footer-links ul {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: #aaa;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            margin-top: 30px;
            border-top: 1px solid #333;
            font-size: 0.9rem;
            color: #777;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.4rem; }
            h2 { font-size: 1.8rem; }
            .main-nav ul { gap: 15px; }
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            .main-nav {
                position: fixed;
                top: 70px;
                left: 0;
                width: 100%;
                background-color: white;
                box-shadow: var(--shadow);
                padding: 20px;
                transform: translateY(-100%);
                opacity: 0;
                visibility: hidden;
                transition: var(--transition);
                z-index: 999;
            }
            .main-nav.active {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 15px;
            }
            .header-container { padding: 15px; }
            .search-form { flex-direction: column; }
            .search-btn { justify-content: center; padding: 15px; }
            .form-grid { grid-template-columns: 1fr; }
            .user-interaction { padding: 25px; }
            .footer-container { grid-template-columns: 1fr; text-align: center; }
            .longtail-links { text-align: center; }
            .web-link { margin: 8px 10px; }
        }
        @media (max-width: 480px) {
            h1 { font-size: 2rem; }
            h2 { font-size: 1.6rem; }
            .main-content { padding: 25px 15px; }
            .section { padding: 40px 0; }
            .stat-card { padding: 20px; }
        }