:root {
            --primary-color: #2ecc71;
            --secondary-color: #27ae60;
            --accent-color: #e74c3c;
            --dark-color: #2c3e50;
            --light-color: #ecf0f1;
            --text-color: #333;
            --gray-color: #95a5a6;
            --shadow: 0 4px 12px rgba(0,0,0,0.1);
            --border-radius: 8px;
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: #f9f9f9;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: var(--secondary-color);
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent-color);
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: var(--dark-color);
            color: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary-color);
            text-transform: uppercase;
            letter-spacing: 2px;
        }
        .my-logo span {
            color: white;
        }
        .my-logo:hover {
            color: white;
        }
        .my-logo:hover span {
            color: var(--primary-color);
        }
        nav {
            display: flex;
            align-items: center;
        }
        .nav-links {
            display: flex;
            list-style: none;
        }
        .nav-links li {
            margin-left: 30px;
        }
        .nav-links a {
            color: white;
            font-weight: 600;
            padding: 5px 0;
            border-bottom: 2px solid transparent;
        }
        .nav-links a:hover {
            border-bottom-color: var(--primary-color);
            color: var(--primary-color);
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: white;
        }
        .breadcrumb {
            background-color: #34495e;
            padding: 10px 0;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: var(--light-color);
        }
        .breadcrumb a:hover {
            color: var(--primary-color);
        }
        .breadcrumb span {
            color: var(--gray-color);
            margin: 0 8px;
        }
        main {
            padding: 40px 0;
            background-color: white;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            margin: 30px auto;
        }
        .content-container {
            padding: 0 30px;
        }
        h1 {
            color: var(--dark-color);
            font-size: 2.8rem;
            margin-bottom: 20px;
            line-height: 1.2;
            border-left: 6px solid var(--primary-color);
            padding-left: 15px;
        }
        h2 {
            color: var(--secondary-color);
            font-size: 2.2rem;
            margin: 40px 0 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid #eee;
        }
        h3 {
            color: var(--dark-color);
            font-size: 1.8rem;
            margin: 30px 0 15px;
        }
        h4 {
            color: #555;
            font-size: 1.4rem;
            margin: 25px 0 10px;
        }
        p {
            margin-bottom: 20px;
            font-size: 1.1rem;
            line-height: 1.8;
        }
        .lead {
            font-size: 1.3rem;
            color: var(--dark-color);
            font-weight: 500;
            background-color: #f8f9fa;
            padding: 20px;
            border-radius: var(--border-radius);
            border-left: 4px solid var(--primary-color);
        }
        .highlight {
            background-color: #fff9e6;
            padding: 25px;
            border-radius: var(--border-radius);
            border: 1px solid #ffeb99;
            margin: 30px 0;
        }
        .highlight h3 {
            color: #e67e22;
            margin-top: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            margin: 30px auto;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: var(--gray-color);
            margin-top: -20px;
            margin-bottom: 30px;
        }
        ul, ol {
            margin: 20px 0 20px 30px;
        }
        li {
            margin-bottom: 10px;
        }
        strong {
            color: var(--dark-color);
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        .quote {
            border-left: 5px solid var(--accent-color);
            padding: 20px 30px;
            margin: 30px 0;
            background-color: #fdf2f2;
            font-style: italic;
            color: #555;
        }
        .quote-author {
            text-align: right;
            font-weight: bold;
            color: var(--accent-color);
            margin-top: 10px;
        }
        .search-box {
            background-color: #f1f8ff;
            padding: 30px;
            border-radius: var(--border-radius);
            margin: 40px 0;
            text-align: center;
        }
        .search-box h3 {
            margin-top: 0;
            color: #2980b9;
        }
        .search-form {
            display: flex;
            max-width: 600px;
            margin: 20px auto 0;
        }
        .search-input {
            flex-grow: 1;
            padding: 15px;
            border: 2px solid #ddd;
            border-radius: var(--border-radius) 0 0 var(--border-radius);
            font-size: 1rem;
        }
        .search-btn {
            background-color: var(--secondary-color);
            color: white;
            border: none;
            padding: 0 25px;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            cursor: pointer;
            font-size: 1rem;
            transition: var(--transition);
        }
        .search-btn:hover {
            background-color: var(--primary-color);
        }
        .rating-section, .comments-section {
            background-color: #f9f9f9;
            padding: 30px;
            border-radius: var(--border-radius);
            margin: 40px 0;
        }
        .rating-form, .comment-form {
            display: grid;
            gap: 20px;
            margin-top: 20px;
        }
        .stars {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 5px;
        }
        .stars input {
            display: none;
        }
        .stars label {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .stars label:hover,
        .stars label:hover ~ label,
        .stars input:checked ~ label {
            color: #ffcc00;
        }
        .form-group {
            display: flex;
            flex-direction: column;
        }
        .form-group label {
            margin-bottom: 8px;
            font-weight: 600;
        }
        .form-control {
            padding: 12px 15px;
            border: 1px solid #ddd;
            border-radius: var(--border-radius);
            font-size: 1rem;
            font-family: inherit;
        }
        textarea.form-control {
            min-height: 150px;
            resize: vertical;
        }
        .submit-btn {
            background-color: var(--secondary-color);
            color: white;
            border: none;
            padding: 15px 30px;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-size: 1.1rem;
            font-weight: 600;
            transition: var(--transition);
            justify-self: start;
        }
        .submit-btn:hover {
            background-color: var(--primary-color);
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        .comment {
            border-bottom: 1px solid #eee;
            padding: 20px 0;
        }
        .comment:last-child {
            border-bottom: none;
        }
        .comment-header {
            display: flex;
            justify-content: space-between;
            margin-bottom: 10px;
            font-size: 0.9rem;
            color: var(--gray-color);
        }
        .comment-author {
            font-weight: bold;
            color: var(--dark-color);
        }
        .update-time {
            text-align: right;
            color: var(--gray-color);
            font-style: italic;
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid #eee;
        }
        footer {
            background-color: var(--dark-color);
            color: white;
            padding: 50px 0 20px;
            margin-top: 50px;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
        }
        .footer-logo {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary-color);
            margin-bottom: 20px;
            display: block;
        }
        .footer-links h4 {
            color: white;
            margin-bottom: 20px;
            font-size: 1.2rem;
        }
        .footer-links ul {
            list-style: none;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: #bdc3c7;
        }
        .footer-links a:hover {
            color: var(--primary-color);
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background-color: #34495e;
            padding: 15px;
            border-radius: var(--border-radius);
            margin: 20px 0;
        }
        friend-link a {
            color: var(--primary-color);
            font-weight: 600;
        }
        friend-link a:hover {
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            margin-top: 30px;
            border-top: 1px solid #34495e;
            color: #95a5a6;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.4rem; }
            h2 { font-size: 2rem; }
            h3 { font-size: 1.6rem; }
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .nav-links {
                position: fixed;
                top: 80px;
                left: 0;
                width: 100%;
                background-color: var(--dark-color);
                flex-direction: column;
                align-items: center;
                padding: 20px 0;
                clip-path: polygon(0 0, 100% 0, 100% 0, 0 0);
                transition: var(--transition);
            }
            .nav-links.active {
                clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
            }
            .nav-links li {
                margin: 15px 0;
            }
            .header-container {
                padding: 15px 20px;
            }
            .content-container {
                padding: 0 20px;
            }
            .search-form {
                flex-direction: column;
            }
            .search-input {
                border-radius: var(--border-radius);
                margin-bottom: 10px;
            }
            .search-btn {
                border-radius: var(--border-radius);
                padding: 15px;
            }
        }