:root {
            --primary-color: #2c5aa0;
            --secondary-color: #4CAF50;
            --accent-color: #FF9800;
            --text-dark: #333;
            --text-light: #666;
            --bg-light: #f9f9f9;
            --bg-section: #fff;
            --border-color: #e1e1e1;
            --font-heading: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            --font-body: 'Georgia', 'Times New Roman', serif;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-body);
            color: var(--text-dark);
            line-height: 1.8;
            background-color: var(--bg-light);
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a {
            color: var(--primary-color);
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: var(--accent-color);
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: var(--bg-section);
            box-shadow: 0 2px 10px rgba(0,0,0,0.05);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
            border-bottom: 1px solid var(--border-color);
        }
        .my-logo {
            font-family: var(--font-heading);
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--primary-color);
            letter-spacing: -0.5px;
        }
        .my-logo span {
            color: var(--secondary-color);
        }
        .search-form {
            display: flex;
            max-width: 400px;
            width: 100%;
        }
        .search-form input {
            flex-grow: 1;
            padding: 12px 15px;
            border: 2px solid var(--border-color);
            border-radius: 30px 0 0 30px;
            font-size: 1rem;
            outline: none;
        }
        .search-form button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0 25px;
            border-radius: 0 30px 30px 0;
            cursor: pointer;
            transition: background-color 0.3s;
        }
        .search-form button:hover {
            background-color: #1e4070;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: var(--primary-color);
            cursor: pointer;
        }
        nav {
            padding: 15px 0;
        }
        .nav-links {
            display: flex;
            list-style: none;
            justify-content: center;
            gap: 30px;
        }
        .nav-links a {
            font-family: var(--font-heading);
            font-weight: 600;
            font-size: 1.05rem;
            padding: 8px 0;
            position: relative;
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--accent-color);
            transition: width 0.3s ease;
        }
        .nav-links a:hover::after {
            width: 100%;
        }
        .breadcrumb {
            padding: 15px 0;
            font-size: 0.9rem;
            color: var(--text-light);
            border-bottom: 1px solid var(--border-color);
        }
        .breadcrumb a {
            color: var(--text-light);
        }
        .breadcrumb a:hover {
            color: var(--primary-color);
        }
        main {
            flex: 1;
            padding: 40px 0;
        }
        article {
            background-color: var(--bg-section);
            padding: 40px;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.03);
            margin-bottom: 40px;
        }
        h1, h2, h3, h4 {
            font-family: var(--font-heading);
            color: var(--text-dark);
            margin-top: 2rem;
            margin-bottom: 1rem;
            line-height: 1.3;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary-color);
            border-bottom: 3px solid var(--accent-color);
            padding-bottom: 15px;
            margin-top: 0;
        }
        h2 {
            font-size: 2.2rem;
            color: #444;
            padding-left: 15px;
            border-left: 5px solid var(--secondary-color);
        }
        h3 {
            font-size: 1.8rem;
            color: #555;
        }
        h4 {
            font-size: 1.4rem;
            color: #666;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
            font-size: 1.1rem;
        }
        .intro {
            font-size: 1.3rem;
            color: var(--text-light);
            font-style: italic;
            padding: 20px;
            background-color: #f0f7ff;
            border-radius: 8px;
            margin: 30px 0;
        }
        .highlight {
            background-color: #fff9e6;
            padding: 25px;
            border-left: 5px solid var(--accent-color);
            margin: 30px 0;
        }
        .highlight p:last-child {
            margin-bottom: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            margin: 30px auto;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            transition: transform 0.3s ease;
        }
        img:hover {
            transform: scale(1.01);
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: var(--text-light);
            margin-top: -20px;
            margin-bottom: 30px;
        }
        ul, ol {
            margin-left: 30px;
            margin-bottom: 1.5rem;
        }
        li {
            margin-bottom: 0.5rem;
        }
        strong {
            color: var(--primary-color);
            font-weight: 700;
        }
        .related-links {
            background-color: #f5f9ff;
            padding: 25px;
            border-radius: 8px;
            margin: 40px 0;
        }
        .related-links h3 {
            margin-top: 0;
        }
        .related-links ul {
            list-style: none;
            margin-left: 0;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 15px;
        }
        .related-links li a {
            display: block;
            padding: 12px 15px;
            background-color: white;
            border-radius: 5px;
            border: 1px solid var(--border-color);
            transition: all 0.3s;
        }
        .related-links li a:hover {
            border-color: var(--primary-color);
            box-shadow: 0 3px 8px rgba(44, 90, 160, 0.1);
        }
        .user-interaction {
            background-color: var(--bg-section);
            padding: 40px;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.03);
            margin-bottom: 40px;
        }
        .interaction-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin-top: 30px;
        }
        .comment-box, .rating-box {
            background-color: #f9f9f9;
            padding: 25px;
            border-radius: 8px;
        }
        .comment-box h3, .rating-box h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .comment-box form, .rating-box form {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .form-group {
            display: flex;
            flex-direction: column;
        }
        .form-group label {
            margin-bottom: 8px;
            font-weight: 600;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            padding: 12px;
            border: 1px solid var(--border-color);
            border-radius: 5px;
            font-family: inherit;
            font-size: 1rem;
        }
        .form-group textarea {
            min-height: 150px;
            resize: vertical;
        }
        .stars {
            display: flex;
            gap: 10px;
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
        }
        .stars i:hover,
        .stars i.active {
            color: #FFD700;
        }
        .submit-btn {
            background-color: var(--secondary-color);
            color: white;
            border: none;
            padding: 15px;
            border-radius: 5px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background-color 0.3s;
        }
        .submit-btn:hover {
            background-color: #3d8b40;
        }
        footer {
            background-color: #2a2a2a;
            color: #ccc;
            padding: 50px 0 20px;
            margin-top: auto;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo {
            font-family: var(--font-heading);
            font-size: 2rem;
            color: white;
            margin-bottom: 20px;
        }
        .footer-section h4 {
            color: white;
            margin-bottom: 20px;
            font-size: 1.3rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        .footer-links a {
            color: #aaa;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background-color: #333;
            padding: 15px;
            border-radius: 5px;
            margin-bottom: 10px;
            border-left: 4px solid var(--accent-color);
        }
        friend-link a {
            color: #ddd;
            font-weight: 600;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #444;
            font-size: 0.9rem;
            color: #888;
        }
        .update-time {
            text-align: right;
            font-size: 0.9rem;
            color: var(--text-light);
            font-style: italic;
            margin-top: 30px;
            padding-top: 20px;
            border-top: 1px dashed var(--border-color);
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.4rem; }
            h2 { font-size: 2rem; }
            article, .user-interaction { padding: 30px; }
        }
        @media (max-width: 768px) {
            .header-top {
                flex-wrap: wrap;
                gap: 15px;
            }
            .search-form {
                order: 3;
                max-width: 100%;
            }
            .hamburger {
                display: block;
            }
            .nav-links {
                display: none;
                flex-direction: column;
                gap: 0;
                width: 100%;
                background-color: var(--bg-section);
                position: absolute;
                top: 100%;
                left: 0;
                box-shadow: 0 5px 10px rgba(0,0,0,0.1);
                padding: 20px 0;
            }
            .nav-links.active {
                display: flex;
            }
            .nav-links li {
                text-align: center;
                padding: 12px 0;
                border-bottom: 1px solid var(--border-color);
            }
            h1 { font-size: 2rem; }
            h2 { font-size: 1.8rem; }
            article, .user-interaction { padding: 20px; }
            .interaction-grid {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 480px) {
            .container { padding: 0 15px; }
            h1 { font-size: 1.8rem; }
            .intro { font-size: 1.1rem; padding: 15px; }
        }