* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        :root {
            --primary: #2c3e50;
            --secondary: #3498db;
            --accent: #e74c3c;
            --light: #ecf0f1;
            --dark: #2c3e50;
            --gray: #7f8c8d;
            --success: #27ae60;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: #f9f9f9;
            color: #333;
            line-height: 1.7;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a {
            color: var(--secondary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .text-center { text-align: center; }
        .bold { font-weight: 700; }
        .italic { font-style: italic; }
        .highlight {
            background-color: #fffacd;
            padding: 2px 5px;
            border-radius: 3px;
        }
        .section-padding {
            padding: 60px 0;
        }
        .site-header {
            background-color: var(--primary);
            color: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: white;
            display: flex;
            align-items: center;
        }
        .my-logo i {
            color: var(--secondary);
            margin-right: 10px;
        }
        .my-logo:hover {
            color: var(--light);
        }
        .search-form {
            display: flex;
            width: 300px;
        }
        .search-input {
            flex-grow: 1;
            padding: 10px 15px;
            border: none;
            border-radius: 4px 0 0 4px;
            font-size: 1rem;
        }
        .search-btn {
            background-color: var(--secondary);
            color: white;
            border: none;
            padding: 10px 20px;
            border-radius: 0 4px 4px 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-btn:hover {
            background-color: #2980b9;
        }
        .main-nav {
            background-color: #34495e;
        }
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            position: relative;
        }
        .nav-menu {
            display: flex;
            list-style: none;
        }
        .nav-item {
            position: relative;
        }
        .nav-link {
            color: white;
            padding: 18px 20px;
            display: block;
            font-weight: 600;
        }
        .nav-link:hover {
            background-color: var(--secondary);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 10px;
        }
        .breadcrumb {
            padding: 15px 0;
            background-color: #f1f1f1;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb li:not(:last-child)::after {
            content: ">";
            margin: 0 10px;
            color: var(--gray);
        }
        .breadcrumb a {
            color: var(--gray);
        }
        .breadcrumb a:hover {
            color: var(--secondary);
        }
        .main-content {
            flex: 1;
            padding: 30px 0;
        }
        .article-header {
            margin-bottom: 40px;
            border-bottom: 3px solid var(--secondary);
            padding-bottom: 20px;
        }
        .article-header h1 {
            font-size: 2.8rem;
            color: var(--primary);
            margin-bottom: 15px;
            line-height: 1.2;
        }
        .meta-info {
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--gray);
            font-size: 0.95rem;
            flex-wrap: wrap;
            gap: 15px;
        }
        .update-time {
            background-color: #e3f2fd;
            padding: 5px 10px;
            border-radius: 4px;
        }
        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        @media (max-width: 992px) {
            .content-wrapper {
                grid-template-columns: 1fr;
            }
        }
        .article-body {
            background: white;
            padding: 40px;
            border-radius: 10px;
            box-shadow: var(--shadow);
        }
        .article-body h2 {
            color: var(--primary);
            font-size: 2rem;
            margin: 35px 0 15px;
            padding-bottom: 8px;
            border-bottom: 2px dashed #eee;
        }
        .article-body h3 {
            color: var(--dark);
            font-size: 1.6rem;
            margin: 30px 0 15px;
        }
        .article-body h4 {
            color: var(--gray);
            font-size: 1.3rem;
            margin: 25px 0 10px;
        }
        .article-body p {
            margin-bottom: 20px;
            font-size: 1.1rem;
            text-align: justify;
        }
        .article-body ul, .article-body ol {
            margin-bottom: 20px;
            padding-left: 30px;
        }
        .article-body li {
            margin-bottom: 8px;
        }
        .featured-img {
            width: 100%;
            margin: 30px 0;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 6px 15px rgba(0,0,0,0.1);
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: var(--gray);
            margin-top: 8px;
            font-size: 0.9rem;
        }
        .quote-box {
            border-left: 5px solid var(--secondary);
            background-color: #f8f9fa;
            padding: 25px;
            margin: 30px 0;
            font-style: italic;
            font-size: 1.2rem;
            color: #555;
        }
        .info-box {
            background-color: #e8f4fc;
            border: 1px solid var(--secondary);
            border-radius: 8px;
            padding: 25px;
            margin: 30px 0;
        }
        .info-box h4 {
            margin-top: 0;
            color: var(--secondary);
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }
        .sidebar-widget {
            background: white;
            padding: 25px;
            border-radius: 8px;
            box-shadow: var(--shadow);
        }
        .sidebar-widget h3 {
            color: var(--primary);
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid #eee;
        }
        .rating-widget form {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }
        .stars {
            display: flex;
            justify-content: center;
            gap: 10px;
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            margin-bottom: 10px;
        }
        .stars .star:hover,
        .stars .star.active {
            color: #ffc107;
        }
        .rating-widget input, .rating-widget textarea {
            padding: 12px;
            border: 1px solid #ccc;
            border-radius: 4px;
            font-size: 1rem;
        }
        .rating-widget button {
            background-color: var(--success);
            color: white;
            border: none;
            padding: 12px;
            border-radius: 4px;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .rating-widget button:hover {
            background-color: #219653;
        }
        .related-links {
            list-style: none;
            padding: 0;
        }
        .related-links li {
            margin-bottom: 12px;
            padding-bottom: 12px;
            border-bottom: 1px dotted #eee;
        }
        .related-links li:last-child {
            border-bottom: none;
        }
        .related-links a {
            display: block;
            padding: 8px 5px;
            border-radius: 4px;
        }
        .related-links a:hover {
            background-color: #f0f7ff;
            padding-left: 10px;
        }
        .comments-section {
            margin-top: 50px;
        }
        .comment-form {
            display: flex;
            flex-direction: column;
            gap: 20px;
            background: white;
            padding: 30px;
            border-radius: 8px;
            box-shadow: var(--shadow);
            margin-bottom: 40px;
        }
        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }
        @media (max-width: 768px) {
            .form-row {
                grid-template-columns: 1fr;
            }
        }
        .comment-form input, .comment-form textarea {
            padding: 15px;
            border: 1px solid #ccc;
            border-radius: 4px;
            font-size: 1rem;
            width: 100%;
        }
        .comment-form textarea {
            min-height: 150px;
            resize: vertical;
        }
        .comment-form button {
            background-color: var(--secondary);
            color: white;
            border: none;
            padding: 15px 30px;
            border-radius: 4px;
            cursor: pointer;
            font-size: 1.1rem;
            font-weight: 600;
            transition: var(--transition);
            align-self: flex-start;
        }
        .comment-form button:hover {
            background-color: #2980b9;
        }
        .comment-list {
            display: flex;
            flex-direction: column;
            gap: 25px;
        }
        .comment {
            background: white;
            padding: 25px;
            border-radius: 8px;
            box-shadow: 0 3px 10px rgba(0,0,0,0.05);
            border-left: 4px solid var(--secondary);
        }
        .comment-header {
            display: flex;
            justify-content: space-between;
            margin-bottom: 15px;
            flex-wrap: wrap;
            gap: 10px;
        }
        .comment-author {
            font-weight: 700;
            color: var(--primary);
        }
        .comment-date {
            color: var(--gray);
            font-size: 0.9rem;
        }
        .site-footer {
            background-color: var(--primary);
            color: white;
            padding: 50px 0 20px;
            margin-top: 60px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 40px;
            margin-bottom: 40px;
        }
        @media (max-width: 768px) {
            .footer-content {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 480px) {
            .footer-content {
                grid-template-columns: 1fr;
            }
        }
        .footer-widget h4 {
            color: white;
            margin-bottom: 25px;
            font-size: 1.3rem;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-widget h4::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 40px;
            height: 3px;
            background-color: var(--secondary);
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        .footer-links a {
            color: #bdc3c7;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background-color: #34495e;
            padding: 15px;
            border-radius: 6px;
            margin: 10px 0;
            color: #bdc3c7;
        }
        friend-link a {
            color: white;
            font-weight: 600;
        }
        friend-link a:hover {
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #34495e;
            color: #bdc3c7;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .nav-menu {
                position: fixed;
                left: -100%;
                top: 100px;
                flex-direction: column;
                background-color: var(--primary);
                width: 100%;
                text-align: center;
                transition: 0.3s;
                box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
                z-index: 999;
            }
            .nav-menu.active {
                left: 0;
            }
            .nav-item {
                margin: 0;
            }
            .hamburger {
                display: block;
            }
            .search-form {
                width: 200px;
            }
            .article-header h1 {
                font-size: 2.2rem;
            }
            .article-body {
                padding: 25px;
            }
        }
        @media (max-width: 768px) {
            .header-top {
                flex-direction: column;
                gap: 20px;
            }
            .search-form {
                width: 100%;
            }
            .article-header h1 {
                font-size: 1.9rem;
            }
            .section-padding {
                padding: 40px 0;
            }
        }