:root {
            --primary-color: #1a5f7a;
            --secondary-color: #57cc99;
            --accent-color: #ffd166;
            --dark-color: #2d3047;
            --light-color: #f8f9fa;
            --text-color: #333;
            --text-light: #666;
            --border-color: #dee2e6;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
            --border-radius: 8px;
            --container-width: 1200px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--text-color);
            background-color: #fff;
            overflow-x: hidden;
        }
        a {
            color: var(--primary-color);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary-color);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .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 {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--accent-color);
            text-transform: uppercase;
            letter-spacing: 2px;
            font-family: Georgia, serif;
            display: flex;
            align-items: center;
        }
        .my-logo i {
            margin-right: 10px;
            color: var(--secondary-color);
        }
        .my-logo:hover {
            color: white;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: white;
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a:hover {
            color: var(--accent-color);
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background-color: var(--secondary-color);
            transition: var(--transition);
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            cursor: pointer;
            background: transparent;
            border: none;
            padding: 5px;
        }
        .hamburger span {
            width: 25px;
            height: 3px;
            background-color: white;
            margin: 3px 0;
            border-radius: 2px;
            transition: var(--transition);
        }
        .breadcrumb {
            background-color: var(--light-color);
            padding: 1rem 0;
            border-bottom: 1px solid var(--border-color);
            font-size: 0.9rem;
        }
        .breadcrumb ul {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '/';
            margin-left: 0.5rem;
            color: var(--text-light);
        }
        .main-content {
            padding: 3rem 0;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            max-width: 100%;
        }
        .article-content h1 {
            font-size: 2.8rem;
            margin-bottom: 1.5rem;
            color: var(--dark-color);
            line-height: 1.2;
        }
        .article-content h2 {
            font-size: 2rem;
            margin: 2.5rem 0 1.2rem;
            color: var(--primary-color);
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--secondary-color);
        }
        .article-content h3 {
            font-size: 1.6rem;
            margin: 2rem 0 1rem;
            color: var(--dark-color);
        }
        .article-content h4 {
            font-size: 1.3rem;
            margin: 1.5rem 0 0.8rem;
            color: var(--text-color);
        }
        .article-content p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .article-content strong {
            color: var(--primary-color);
            font-weight: 700;
        }
        .article-content em {
            color: var(--text-light);
        }
        .featured-image {
            margin: 2rem 0;
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .featured-image figcaption {
            text-align: center;
            font-style: italic;
            padding: 0.8rem;
            background-color: var(--light-color);
            color: var(--text-light);
            font-size: 0.9rem;
        }
        .inline-link {
            font-weight: 600;
            border-bottom: 1px dotted var(--primary-color);
        }
        .inline-link:hover {
            border-bottom-style: solid;
        }
        .highlight-box {
            background-color: #f0f9ff;
            border-left: 5px solid var(--primary-color);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .quote {
            font-size: 1.2rem;
            font-style: italic;
            color: var(--primary-color);
            text-align: center;
            padding: 2rem;
            background-color: var(--light-color);
            border-radius: var(--border-radius);
            margin: 2.5rem 0;
            position: relative;
        }
        .quote::before,
        .quote::after {
            content: '"';
            font-size: 3rem;
            color: var(--secondary-color);
            position: absolute;
            opacity: 0.3;
        }
        .quote::before {
            top: 10px;
            left: 20px;
        }
        .quote::after {
            bottom: 10px;
            right: 20px;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 1.5rem;
            margin: 2.5rem 0;
        }
        .stat-card {
            background: linear-gradient(135deg, var(--primary-color), #2a9d8f);
            color: white;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            text-align: center;
            box-shadow: var(--shadow);
        }
        .stat-card .number {
            font-size: 2.5rem;
            font-weight: 800;
            display: block;
            margin-bottom: 0.5rem;
        }
        .search-module {
            background-color: var(--light-color);
            padding: 2rem;
            border-radius: var(--border-radius);
            margin-bottom: 2.5rem;
            box-shadow: var(--shadow);
        }
        .search-module h3 {
            margin-top: 0;
        }
        .search-form {
            display: flex;
            margin-top: 1rem;
        }
        .search-form input {
            flex: 1;
            padding: 0.8rem 1rem;
            border: 2px solid var(--border-color);
            border-right: none;
            border-radius: var(--border-radius) 0 0 var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        .search-form input:focus {
            outline: none;
            border-color: var(--primary-color);
        }
        .search-form button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-form button:hover {
            background-color: var(--secondary-color);
        }
        .user-interaction {
            background-color: var(--light-color);
            padding: 2.5rem;
            border-radius: var(--border-radius);
            margin-top: 3rem;
            box-shadow: var(--shadow);
        }
        .user-interaction h2 {
            margin-top: 0;
        }
        .rating-form,
        .comment-form {
            margin-top: 2rem;
        }
        .stars {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            margin: 1rem 0;
        }
        .stars input {
            display: none;
        }
        .stars label {
            cursor: pointer;
            font-size: 2rem;
            color: #ddd;
            transition: var(--transition);
            margin-right: 5px;
        }
        .stars input:checked ~ label,
        .stars label:hover,
        .stars label:hover ~ label {
            color: var(--accent-color);
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        .form-control {
            width: 100%;
            padding: 0.8rem;
            border: 2px solid var(--border-color);
            border-radius: var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-control:focus {
            outline: none;
            border-color: var(--primary-color);
        }
        textarea.form-control {
            min-height: 150px;
            resize: vertical;
        }
        .submit-btn {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0.8rem 2rem;
            border-radius: var(--border-radius);
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }
        .submit-btn:hover {
            background-color: var(--secondary-color);
            transform: translateY(-2px);
        }
        .sidebar {
            position: sticky;
            top: 120px;
            align-self: start;
        }
        .sidebar-widget {
            background-color: var(--light-color);
            padding: 1.8rem;
            border-radius: var(--border-radius);
            margin-bottom: 2rem;
            box-shadow: var(--shadow);
        }
        .sidebar-widget h3 {
            margin-top: 0;
            color: var(--primary-color);
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--border-color);
        }
        .related-links ul {
            list-style: none;
        }
        .related-links li {
            margin-bottom: 0.8rem;
            padding-bottom: 0.8rem;
            border-bottom: 1px dashed var(--border-color);
        }
        .related-links li:last-child {
            margin-bottom: 0;
            border-bottom: none;
        }
        .update-time {
            font-size: 0.9rem;
            color: var(--text-light);
            text-align: center;
            background-color: #fff8e1;
            padding: 0.8rem;
            border-radius: var(--border-radius);
            border: 1px solid #ffecb3;
        }
        .update-time i {
            color: var(--accent-color);
            margin-right: 5px;
        }
        .site-footer {
            background-color: var(--dark-color);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .footer-widget h4 {
            color: var(--accent-color);
            margin-bottom: 1.5rem;
            font-size: 1.3rem;
        }
        .footer-widget ul {
            list-style: none;
        }
        .footer-widget li {
            margin-bottom: 0.8rem;
        }
        .footer-widget a {
            color: #ccc;
        }
        .footer-widget a:hover {
            color: white;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            margin-top: 2rem;
            padding-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #ccc;
            font-size: 0.9rem;
        }
        friend-link a {
            color: var(--secondary-color);
            font-weight: 600;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #aaa;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: flex;
            }
            .main-nav ul {
                position: fixed;
                top: 80px;
                left: -100%;
                width: 100%;
                height: calc(100vh - 80px);
                background-color: var(--dark-color);
                flex-direction: column;
                align-items: center;
                padding-top: 3rem;
                transition: var(--transition);
                z-index: 999;
            }
            .main-nav.active ul {
                left: 0;
            }
            .main-nav ul li {
                margin: 1.5rem 0;
            }
            .article-content h1 {
                font-size: 2.2rem;
            }
            .article-content h2 {
                font-size: 1.8rem;
            }
            .article-content h3 {
                font-size: 1.4rem;
            }
            .quote {
                padding: 1.5rem;
                font-size: 1.1rem;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .user-interaction {
                padding: 1.5rem;
            }
            .search-form {
                flex-direction: column;
            }
            .search-form input {
                border-radius: var(--border-radius);
                border-right: 2px solid var(--border-color);
                margin-bottom: 10px;
            }
            .search-form button {
                border-radius: var(--border-radius);
                padding: 0.8rem;
            }
        }
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-on-scroll {
            animation: fadeInUp 0.8s ease-out forwards;
        }