* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary: #1a237e;
            --secondary: #ff5722;
            --accent: #ffc107;
            --dark: #0d1440;
            --light: #f5f5f5;
            --text: #333333;
            --text-light: #666666;
            --border: #e0e0e0;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
            --border-radius: 8px;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: var(--text);
            background-color: #f9f9f9;
            overflow-x: hidden;
        }
        .site-header {
            background: linear-gradient(135deg, var(--dark) 0%, var(--primary) 100%);
            color: 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 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent);
            text-decoration: none;
            text-transform: uppercase;
            letter-spacing: 2px;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo:hover {
            color: white;
            transform: scale(1.05);
        }
        .my-logo i {
            color: var(--secondary);
        }
        .nav-desktop {
            display: flex;
            gap: 2rem;
        }
        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
        }
        .nav-link {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: var(--border-radius);
            transition: var(--transition);
            position: relative;
        }
        .nav-link:hover {
            background-color: rgba(255, 255, 255, 0.1);
            color: var(--accent);
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            width: 0;
            height: 2px;
            background: var(--accent);
            transition: var(--transition);
            transform: translateX(-50%);
        }
        .nav-link:hover::after {
            width: 80%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
        }
        .nav-mobile {
            display: none;
            flex-direction: column;
            background-color: var(--dark);
            position: absolute;
            top: 100%;
            left: 0;
            right: 0;
            padding: 1rem;
            box-shadow: var(--shadow);
            z-index: 999;
        }
        .nav-mobile.active {
            display: flex;
        }
        .mobile-nav-link {
            color: white;
            text-decoration: none;
            padding: 1rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            transition: var(--transition);
        }
        .mobile-nav-link:hover {
            background-color: rgba(255, 255, 255, 0.1);
            padding-left: 1.5rem;
        }
        .breadcrumb {
            background-color: var(--light);
            padding: 1rem 20px;
            font-size: 0.9rem;
            border-bottom: 1px solid var(--border);
        }
        .breadcrumb-container {
            max-width: 1200px;
            margin: 0 auto;
        }
        .breadcrumb a {
            color: var(--primary);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb span {
            color: var(--text-light);
            margin: 0 5px;
        }
        .search-container {
            max-width: 1200px;
            margin: 2rem auto;
            padding: 0 20px;
        }
        .search-form {
            display: flex;
            max-width: 600px;
            margin: 0 auto;
            box-shadow: var(--shadow);
            border-radius: var(--border-radius);
            overflow: hidden;
        }
        .search-input {
            flex: 1;
            padding: 1rem 1.5rem;
            border: none;
            font-size: 1rem;
            outline: none;
        }
        .search-button {
            background-color: var(--secondary);
            color: white;
            border: none;
            padding: 0 1.5rem;
            cursor: pointer;
            transition: var(--transition);
            font-weight: 600;
        }
        .search-button:hover {
            background-color: #e64a19;
        }
        .main-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2rem;
        }
        @media (max-width: 992px) {
            .main-container {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background-color: white;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            padding: 2rem;
            margin-bottom: 2rem;
        }
        .article-header {
            margin-bottom: 2rem;
            border-bottom: 3px solid var(--accent);
            padding-bottom: 1.5rem;
        }
        h1 {
            color: var(--dark);
            font-size: 2.8rem;
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2.2rem;
            }
        }
        .article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--text-light);
            font-size: 0.9rem;
            margin-top: 1rem;
        }
        .last-updated {
            background-color: var(--light);
            padding: 0.5rem 1rem;
            border-radius: var(--border-radius);
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        h2 {
            color: var(--primary);
            font-size: 2rem;
            margin: 2.5rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--border);
        }
        h3 {
            color: var(--dark);
            font-size: 1.5rem;
            margin: 2rem 0 1rem;
        }
        h4 {
            color: var(--text);
            font-size: 1.2rem;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
        }
        .highlight {
            background-color: rgba(255, 215, 0, 0.2);
            border-left: 4px solid var(--accent);
            padding: 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .tip-box {
            background-color: #e8f4ff;
            border: 1px solid #bbdefb;
            border-radius: var(--border-radius);
            padding: 1.5rem;
            margin: 1.5rem 0;
            display: flex;
            gap: 1rem;
            align-items: flex-start;
        }
        .tip-icon {
            color: var(--primary);
            font-size: 1.5rem;
            flex-shrink: 0;
        }
        .stat-box {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        .stat-item {
            background: linear-gradient(135deg, var(--primary) 0%, var(--dark) 100%);
            color: white;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            text-align: center;
            box-shadow: var(--shadow);
        }
        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--accent);
            display: block;
            margin-bottom: 0.5rem;
        }
        .stat-label {
            font-size: 1rem;
            opacity: 0.9;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary);
            text-decoration: underline;
        }
        .content-link {
            font-weight: 600;
            border-bottom: 2px dotted var(--primary);
        }
        .content-link:hover {
            border-bottom: 2px solid var(--secondary);
        }
        .featured-image {
            width: 100%;
            height: auto;
            border-radius: var(--border-radius);
            margin: 2rem 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);
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: var(--text-light);
            margin-top: 0.5rem;
            font-size: 0.9rem;
        }
        .sidebar {
            background-color: white;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            padding: 1.5rem;
            height: fit-content;
            position: sticky;
            top: 100px;
        }
        @media (max-width: 992px) {
            .sidebar {
                position: static;
            }
        }
        .sidebar-section {
            margin-bottom: 2rem;
        }
        .sidebar-title {
            color: var(--dark);
            font-size: 1.3rem;
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--accent);
        }
        .related-links {
            list-style: none;
        }
        .related-links li {
            margin-bottom: 0.8rem;
            padding-bottom: 0.8rem;
            border-bottom: 1px solid var(--border);
        }
        .related-links a {
            display: flex;
            align-items: center;
            gap: 0.8rem;
            color: var(--text);
        }
        .related-links a:hover {
            color: var(--primary);
        }
        .related-links i {
            color: var(--secondary);
        }
        .rating-section, .comment-section {
            background-color: white;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            padding: 2rem;
            margin-bottom: 2rem;
        }
        .rating-form, .comment-form {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
            margin-top: 1.5rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .form-label {
            font-weight: 600;
            color: var(--dark);
        }
        .form-input, .form-textarea, .form-select {
            padding: 0.8rem 1rem;
            border: 1px solid var(--border);
            border-radius: var(--border-radius);
            font-family: inherit;
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-input:focus, .form-textarea:focus, .form-select:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(26, 35, 126, 0.1);
        }
        .form-textarea {
            min-height: 150px;
            resize: vertical;
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 0.3rem;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .star-rating input:checked ~ label,
        .star-rating label:hover,
        .star-rating label:hover ~ label {
            color: var(--accent);
        }
        .submit-button {
            background: linear-gradient(135deg, var(--primary) 0%, var(--dark) 100%);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: var(--border-radius);
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition);
            align-self: flex-start;
        }
        .submit-button:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 15px rgba(26, 35, 126, 0.3);
        }
        .site-footer {
            background-color: var(--dark);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        .footer-section h3 {
            color: var(--accent);
            font-size: 1.3rem;
            margin-bottom: 1.5rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #ccc;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background-color: rgba(255, 255, 255, 0.1);
            padding: 1rem;
            border-radius: var(--border-radius);
            margin-bottom: 1rem;
            transition: var(--transition);
        }
        friend-link:hover {
            background-color: rgba(255, 255, 255, 0.2);
            transform: translateX(5px);
        }
        friend-link a {
            color: var(--accent);
            font-weight: 600;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #aaa;
            font-size: 0.9rem;
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background-color: var(--secondary);
            color: white;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            cursor: pointer;
            transition: var(--transition);
            opacity: 0;
            visibility: hidden;
            z-index: 100;
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
        }
        .back-to-top.visible {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background-color: #e64a19;
            transform: translateY(-5px);
        }