* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        :root {
            --primary-color: #1a237e;
            --secondary-color: #ff6f00;
            --accent-color: #4caf50;
            --text-dark: #333333;
            --text-light: #666666;
            --background-light: #f5f7fa;
            --white: #ffffff;
            --shadow: 0 4px 12px rgba(0,0,0,0.1);
            --transition: all 0.3s ease;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            line-height: 1.6;
            color: var(--text-dark);
            background-color: var(--background-light);
        }
        .site-header {
            background-color: var(--primary-color);
            color: var(--white);
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo {
            font-size: 1.8rem;
            font-weight: 700;
            text-decoration: none;
            color: var(--white);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .logo i {
            color: var(--secondary-color);
        }
        .logo span {
            color: var(--secondary-color);
        }
        .nav-desktop {
            display: flex;
            gap: 2rem;
        }
        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
        }
        .nav-link {
            color: var(--white);
            text-decoration: none;
            font-weight: 500;
            padding: 0.5rem 0;
            position: relative;
            transition: var(--transition);
        }
        .nav-link:hover {
            color: var(--secondary-color);
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--secondary-color);
            transition: var(--transition);
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: var(--white);
            font-size: 1.5rem;
            cursor: pointer;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
        }
        .nav-mobile {
            position: fixed;
            top: 70px;
            left: 0;
            width: 100%;
            background-color: var(--primary-color);
            padding: 1rem;
            display: none;
            flex-direction: column;
            gap: 1rem;
            box-shadow: var(--shadow);
        }
        .nav-mobile.active {
            display: flex;
        }
        .breadcrumb {
            max-width: 1200px;
            margin: 1rem auto;
            padding: 0 1rem;
        }
        .breadcrumb-nav {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            font-size: 0.9rem;
        }
        .breadcrumb-item {
            color: var(--text-light);
        }
        .breadcrumb-item a {
            color: var(--primary-color);
            text-decoration: none;
        }
        .breadcrumb-item a:hover {
            text-decoration: underline;
        }
        .breadcrumb-separator {
            margin: 0 0.3rem;
        }
        .main-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1rem;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2rem;
        }
        @media (max-width: 992px) {
            .main-container {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background-color: var(--white);
            padding: 2rem;
            border-radius: 10px;
            box-shadow: var(--shadow);
        }
        h1, h2, h3 {
            color: var(--primary-color);
            margin-bottom: 1rem;
            line-height: 1.3;
        }
        h1 {
            font-size: 2.2rem;
            margin-bottom: 1.5rem;
            padding-bottom: 1rem;
            border-bottom: 3px solid var(--secondary-color);
        }
        h2 {
            font-size: 1.8rem;
            margin-top: 2rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px solid #eee;
        }
        h3 {
            font-size: 1.4rem;
            margin-top: 1.5rem;
            color: var(--text-dark);
        }
        p {
            margin-bottom: 1.2rem;
            font-size: 1.05rem;
        }
        .lead {
            font-size: 1.2rem;
            color: var(--text-dark);
            font-weight: 500;
            margin-bottom: 2rem;
            padding: 1rem;
            background-color: #e8f4fd;
            border-radius: 8px;
            border-left: 4px solid var(--primary-color);
        }
        .highlight {
            background-color: #fff8e1;
            padding: 1.5rem;
            border-radius: 8px;
            margin: 1.5rem 0;
            border-left: 4px solid var(--secondary-color);
        }
        .highlight strong {
            color: var(--primary-color);
        }
        .emoji {
            margin-right: 0.5rem;
        }
        ul, ol {
            margin-bottom: 1.5rem;
            padding-left: 1.5rem;
        }
        li {
            margin-bottom: 0.7rem;
        }
        .article-image {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: 8px;
            margin: 2rem auto;
            display: block;
            box-shadow: var(--shadow);
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: var(--text-light);
            margin-top: 0.5rem;
            font-size: 0.95rem;
        }
        .sidebar {
            background-color: var(--white);
            padding: 1.5rem;
            border-radius: 10px;
            box-shadow: var(--shadow);
            height: fit-content;
        }
        .sidebar-section {
            margin-bottom: 2rem;
        }
        .sidebar-title {
            color: var(--primary-color);
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--secondary-color);
        }
        .search-form {
            display: flex;
            margin-bottom: 1.5rem;
        }
        .search-input {
            flex: 1;
            padding: 0.8rem;
            border: 1px solid #ddd;
            border-radius: 4px 0 0 4px;
            font-size: 1rem;
        }
        .search-button {
            background-color: var(--secondary-color);
            color: var(--white);
            border: none;
            padding: 0 1.2rem;
            border-radius: 0 4px 4px 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-button:hover {
            background-color: #e65100;
        }
        .rating-section {
            background-color: #f9f9f9;
            padding: 1.5rem;
            border-radius: 8px;
            margin: 2rem 0;
        }
        .rating-stars {
            display: flex;
            gap: 0.3rem;
            margin: 1rem 0;
        }
        .star {
            color: #ddd;
            font-size: 1.5rem;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover,
        .star.active {
            color: #ffc107;
        }
        .rating-form {
            display: none;
            margin-top: 1rem;
        }
        .rating-form.active {
            display: block;
        }
        .comments-section {
            margin-top: 3rem;
            padding-top: 2rem;
            border-top: 1px solid #eee;
        }
        .comment-form textarea {
            width: 100%;
            padding: 1rem;
            border: 1px solid #ddd;
            border-radius: 8px;
            margin-bottom: 1rem;
            font-size: 1rem;
            resize: vertical;
            min-height: 120px;
        }
        .form-group {
            margin-bottom: 1rem;
        }
        .form-input {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid #ddd;
            border-radius: 4px;
            font-size: 1rem;
        }
        .submit-button {
            background-color: var(--primary-color);
            color: var(--white);
            border: none;
            padding: 0.8rem 2rem;
            border-radius: 4px;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .submit-button:hover {
            background-color: #0d1b6e;
            transform: translateY(-2px);
        }
        .web-links {
            max-width: 1200px;
            margin: 3rem auto 1rem;
            padding: 0 1rem;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1rem;
        }
        .web-link {
            background-color: var(--white);
            padding: 1rem;
            border-radius: 8px;
            box-shadow: var(--shadow);
        }
        .web-link a {
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 500;
            transition: var(--transition);
        }
        .web-link a:hover {
            color: var(--secondary-color);
            text-decoration: underline;
        }
        .site-footer {
            background-color: var(--primary-color);
            color: var(--white);
            padding: 2rem 0;
            margin-top: 3rem;
        }
        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1rem;
            text-align: center;
        }
        .copyright {
            margin-top: 1.5rem;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 0.9rem;
            color: rgba(255,255,255,0.7);
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            h3 {
                font-size: 1.2rem;
            }
            .article-content {
                padding: 1.5rem;
            }
            .web-links {
                grid-template-columns: 1fr;
            }
        }
        .accordion {
            margin: 1.5rem 0;
            border: 1px solid #ddd;
            border-radius: 8px;
            overflow: hidden;
        }
        .accordion-header {
            background-color: #f5f5f5;
            padding: 1rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            transition: var(--transition);
        }
        .accordion-header:hover {
            background-color: #eeeeee;
        }
        .accordion-content {
            padding: 0;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
        }
        .accordion-content.active {
            padding: 1rem;
            max-height: 1000px;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        .stat-box {
            background: linear-gradient(135deg, var(--primary-color), #283593);
            color: white;
            padding: 1.5rem;
            border-radius: 8px;
            text-align: center;
            box-shadow: var(--shadow);
        }
        .stat-number {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }
        .stat-label {
            font-size: 1rem;
            opacity: 0.9;
        }
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            margin: 2rem 0;
        }
        .comparison-table th,
        .comparison-table td {
            padding: 1rem;
            text-align: left;
            border: 1px solid #ddd;
        }
        .comparison-table th {
            background-color: var(--primary-color);
            color: white;
        }
        .comparison-table tr:nth-child(even) {
            background-color: #f9f9f9;
        }
        .tooltip {
            position: relative;
            display: inline-block;
            border-bottom: 1px dotted var(--primary-color);
            cursor: help;
        }
        .tooltip .tooltiptext {
            visibility: hidden;
            width: 300px;
            background-color: var(--primary-color);
            color: white;
            text-align: center;
            padding: 0.5rem;
            border-radius: 6px;
            position: absolute;
            z-index: 1;
            bottom: 125%;
            left: 50%;
            transform: translateX(-50%);
            opacity: 0;
            transition: opacity 0.3s;
        }
        .tooltip:hover .tooltiptext {
            visibility: visible;
            opacity: 1;
        }