* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary-color: #4CAF50;
            --secondary-color: #2196F3;
            --accent-color: #FF9800;
            --dark-color: #2C3E50;
            --light-color: #F5F5F5;
            --text-color: #333;
            --text-light: #666;
            --border-color: #E0E0E0;
            --shadow: 0 4px 12px rgba(0,0,0,0.1);
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: #f9f9f9;
        }
        .site-header {
            background-color: var(--dark-color);
            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: 1.8rem;
            font-weight: 700;
            color: var(--primary-color);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            color: var(--accent-color);
        }
        .desktop-nav {
            display: flex;
            gap: 2rem;
        }
        @media (max-width: 768px) {
            .desktop-nav {
                display: none;
            }
        }
        .nav-link {
            color: white;
            text-decoration: none;
            font-weight: 500;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            transition: var(--transition);
        }
        .nav-link:hover {
            background-color: rgba(255,255,255,0.1);
            color: var(--accent-color);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
        }
        .mobile-nav {
            display: none;
            position: absolute;
            top: 100%;
            left: 0;
            right: 0;
            background-color: var(--dark-color);
            padding: 1rem;
            box-shadow: var(--shadow);
        }
        .mobile-nav.active {
            display: block;
            animation: slideDown 0.3s ease;
        }
        @keyframes slideDown {
            from {
                opacity: 0;
                transform: translateY(-10px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .mobile-nav .nav-link {
            display: block;
            padding: 0.8rem;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        .breadcrumb {
            background-color: var(--light-color);
            padding: 1rem 0;
            border-bottom: 1px solid var(--border-color);
        }
        .breadcrumb-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .breadcrumb a {
            color: var(--secondary-color);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .main-container {
            max-width: 1200px;
            margin: 2rem 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;
            padding: 2.5rem;
            border-radius: 8px;
            box-shadow: var(--shadow);
        }
        .article-header {
            margin-bottom: 2rem;
            padding-bottom: 1.5rem;
            border-bottom: 2px solid var(--primary-color);
        }
        h1 {
            font-size: 2.5rem;
            color: var(--dark-color);
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        .article-meta {
            color: var(--text-light);
            font-size: 0.9rem;
            display: flex;
            gap: 1rem;
            align-items: center;
        }
        .article-meta i {
            color: var(--accent-color);
            margin-right: 0.3rem;
        }
        h2 {
            font-size: 1.8rem;
            color: var(--dark-color);
            margin: 2.5rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px solid var(--border-color);
        }
        h3 {
            font-size: 1.4rem;
            color: var(--dark-color);
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.1rem;
            color: var(--dark-color);
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            line-height: 1.8;
        }
        .lead {
            font-size: 1.2rem;
            color: var(--text-light);
            font-weight: 300;
            margin-bottom: 2rem;
        }
        .highlight {
            background-color: rgba(76, 175, 80, 0.1);
            border-left: 4px solid var(--primary-color);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 4px 4px 0;
        }
        .inline-link {
            color: var(--secondary-color);
            text-decoration: none;
            font-weight: 500;
            transition: var(--transition);
        }
        .inline-link:hover {
            color: var(--primary-color);
            text-decoration: underline;
        }
        .featured-image {
            width: 100%;
            max-height: 500px;
            object-fit: cover;
            border-radius: 8px;
            margin: 2rem 0;
            box-shadow: var(--shadow);
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: var(--text-light);
            margin-top: -1rem;
            margin-bottom: 2rem;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }
        .sidebar-widget {
            background-color: white;
            padding: 1.5rem;
            border-radius: 8px;
            box-shadow: var(--shadow);
        }
        .widget-title {
            font-size: 1.2rem;
            color: var(--dark-color);
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--accent-color);
        }
        .search-form {
            display: flex;
        }
        .search-input {
            flex: 1;
            padding: 0.8rem;
            border: 1px solid var(--border-color);
            border-radius: 4px 0 0 4px;
            font-size: 1rem;
        }
        .search-button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0 1.2rem;
            border-radius: 0 4px 4px 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-button:hover {
            background-color: #3d8b40;
        }
        .rating-widget {
            text-align: center;
        }
        .star-rating {
            display: flex;
            justify-content: center;
            gap: 0.3rem;
            margin: 1rem 0;
            direction: rtl;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            color: #ddd;
            font-size: 1.5rem;
            cursor: pointer;
            transition: var(--transition);
        }
        .star-rating label:hover,
        .star-rating label:hover ~ label,
        .star-rating input:checked ~ label {
            color: #FFD700;
        }
        .rating-submit {
            background-color: var(--secondary-color);
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: 4px;
            cursor: pointer;
            transition: var(--transition);
            width: 100%;
        }
        .rating-submit:hover {
            background-color: #0b7dda;
        }
        .comment-form input,
        .comment-form textarea {
            width: 100%;
            padding: 0.8rem;
            margin-bottom: 1rem;
            border: 1px solid var(--border-color);
            border-radius: 4px;
            font-family: inherit;
        }
        .comment-form textarea {
            min-height: 120px;
            resize: vertical;
        }
        .comment-submit {
            background-color: var(--dark-color);
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: 4px;
            cursor: pointer;
            transition: var(--transition);
            width: 100%;
        }
        .comment-submit:hover {
            background-color: #1a252f;
        }
        .site-footer {
            background-color: var(--dark-color);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h3 {
            color: white;
            font-size: 1.3rem;
            margin-bottom: 1.5rem;
        }
        .friend-links {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }
        .friend-link {
            color: var(--accent-color);
            text-decoration: none;
            transition: var(--transition);
        }
        .friend-link:hover {
            color: white;
            padding-left: 0.5rem;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: rgba(255,255,255,0.7);
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2rem;
            }
            .article-content {
                padding: 1.5rem;
            }
            .main-container {
                padding: 0 15px;
            }
        }
        @media (max-width: 480px) {
            h1 {
                font-size: 1.7rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            .header-container {
                padding: 0 15px;
            }
        }
        .btn {
            display: inline-block;
            padding: 0.8rem 1.5rem;
            background-color: var(--primary-color);
            color: white;
            text-decoration: none;
            border-radius: 4px;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            font-weight: 500;
        }
        .btn:hover {
            background-color: #3d8b40;
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(0,0,0,0.15);
        }
        .btn-secondary {
            background-color: var(--secondary-color);
        }
        .btn-secondary:hover {
            background-color: #0b7dda;
        }
        .stat-box {
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            padding: 1.5rem;
            border-radius: 8px;
            margin: 1.5rem 0;
            text-align: center;
        }
        .stat-number {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--primary-color);
            display: block;
        }
        .stat-label {
            font-size: 0.9rem;
            color: var(--text-light);
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .tooltip {
            position: relative;
            display: inline-block;
            border-bottom: 1px dotted var(--text-light);
            cursor: help;
        }
        .tooltip .tooltiptext {
            visibility: hidden;
            width: 200px;
            background-color: var(--dark-color);
            color: white;
            text-align: center;
            padding: 0.5rem;
            border-radius: 4px;
            position: absolute;
            z-index: 1;
            bottom: 125%;
            left: 50%;
            margin-left: -100px;
            opacity: 0;
            transition: opacity 0.3s;
            font-size: 0.9rem;
        }
        .tooltip:hover .tooltiptext {
            visibility: visible;
            opacity: 1;
        }
        .emoji {
            font-size: 1.2em;
            margin: 0 0.2rem;
        }
        .content-block {
            margin-bottom: 2rem;
        }
        .key-point {
            background-color: rgba(33, 150, 243, 0.05);
            border-left: 4px solid var(--secondary-color);
            padding: 1rem;
            margin: 1.5rem 0;
        }
        .quote {
            font-style: italic;
            color: var(--text-light);
            border-left: 3px solid var(--accent-color);
            padding-left: 1.5rem;
            margin: 2rem 0;
        }
        .quote-author {
            text-align: right;
            font-weight: 600;
            color: var(--dark-color);
            margin-top: 0.5rem;
        }
        .table-container {
            overflow-x: auto;
            margin: 2rem 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            margin: 1rem 0;
        }
        th, td {
            padding: 1rem;
            text-align: left;
            border-bottom: 1px solid var(--border-color);
        }
        th {
            background-color: var(--light-color);
            font-weight: 600;
        }
        tr:hover {
            background-color: rgba(0,0,0,0.02);
        }