:root {
            --primary: #2ecc71;
            --secondary: #e74c3c;
            --dark: #2c3e50;
            --light: #ecf0f1;
            --accent: #f39c12;
            --gray: #7f8c8d;
            --shadow: 0 4px 12px rgba(0,0,0,0.1);
            --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: 1.7;
            color: #333;
            background-color: #f9f9f9;
            overflow-x: hidden;
        }
        .site-header {
            background: linear-gradient(135deg, var(--dark) 0%, #1a2530 100%);
            color: white;
            padding: 1rem 0;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
            transition: var(--transition);
        }
        .my-logo:hover {
            transform: scale(1.05);
            color: #27ae60;
        }
        .my-logo i {
            font-size: 2.5rem;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: var(--light);
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            transition: var(--transition);
        }
        .main-nav a:hover,
        .main-nav a.active {
            background-color: var(--primary);
            color: white;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .breadcrumb {
            background-color: #e8f5e9;
            padding: 1rem 20px;
            margin-bottom: 2rem;
        }
        .breadcrumb ol {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .breadcrumb li {
            display: flex;
            align-items: center;
        }
        .breadcrumb a {
            color: var(--dark);
            text-decoration: none;
            transition: var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--primary);
            text-decoration: underline;
        }
        .breadcrumb i {
            margin: 0 8px;
            color: var(--gray);
        }
        .main-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
        }
        @media (max-width: 992px) {
            .main-container {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background: white;
            padding: 3rem;
            border-radius: 12px;
            box-shadow: var(--shadow);
        }
        h1 {
            color: var(--dark);
            font-size: 2.8rem;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 4px solid var(--primary);
            padding-bottom: 1rem;
        }
        h2 {
            color: var(--dark);
            font-size: 2rem;
            margin: 2.5rem 0 1rem;
            padding-top: 1rem;
            border-top: 2px solid #eee;
        }
        h3 {
            color: #27ae60;
            font-size: 1.6rem;
            margin: 2rem 0 1rem;
        }
        h4 {
            color: var(--accent);
            font-size: 1.3rem;
            margin: 1.8rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.3rem;
            color: var(--dark);
            font-weight: 600;
            background-color: #f8fffa;
            padding: 1.5rem;
            border-left: 5px solid var(--primary);
            border-radius: 0 8px 8px 0;
            margin-bottom: 2.5rem;
        }
        .highlight {
            background-color: #fff9e6;
            padding: 2rem;
            border-radius: 8px;
            border: 2px dashed var(--accent);
            margin: 2rem 0;
        }
        .tip {
            background-color: #e8f7ff;
            padding: 1.5rem;
            border-radius: 8px;
            margin: 1.5rem 0;
            position: relative;
            padding-left: 4rem;
        }
        .tip::before {
            content: '\f05a';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            position: absolute;
            left: 1.5rem;
            top: 1.5rem;
            color: #3498db;
            font-size: 1.5rem;
        }
        img {
            max-width: 100%;
            height: auto;
            border-radius: 8px;
            box-shadow: 0 6px 16px rgba(0,0,0,0.1);
            margin: 2rem auto;
            display: block;
            transition: var(--transition);
        }
        img:hover {
            transform: scale(1.01);
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: var(--gray);
            margin-top: -1rem;
            margin-bottom: 2rem;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .widget {
            background: white;
            padding: 1.8rem;
            border-radius: 10px;
            box-shadow: var(--shadow);
        }
        .widget h3 {
            color: var(--dark);
            font-size: 1.4rem;
            margin-top: 0;
            padding-bottom: 0.8rem;
            border-bottom: 2px solid #eee;
        }
        .search-form {
            display: flex;
            margin-top: 1rem;
        }
        .search-input {
            flex: 1;
            padding: 12px 15px;
            border: 2px solid #ddd;
            border-radius: 6px 0 0 6px;
            font-size: 1rem;
            outline: none;
            transition: var(--transition);
        }
        .search-input:focus {
            border-color: var(--primary);
        }
        .search-btn {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 6px 6px 0;
            cursor: pointer;
            transition: var(--transition);
            font-size: 1.1rem;
        }
        .search-btn:hover {
            background-color: #27ae60;
        }
        .rating-form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .stars {
            display: flex;
            gap: 5px;
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
        }
        .stars i:hover,
        .stars i:hover ~ i {
            color: #ffcc00;
        }
        .rating-form input,
        .rating-form textarea {
            padding: 12px;
            border: 1px solid #ddd;
            border-radius: 6px;
            font-family: inherit;
            font-size: 1rem;
        }
        .rating-form button {
            background-color: var(--accent);
            color: white;
            border: none;
            padding: 12px;
            border-radius: 6px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }
        .rating-form button:hover {
            background-color: #e67e22;
        }
        .comment-form {
            display: flex;
            flex-direction: column;
            gap: 1.2rem;
        }
        .comment-form input,
        .comment-form textarea {
            padding: 14px;
            border: 1px solid #ddd;
            border-radius: 6px;
            font-family: inherit;
            font-size: 1rem;
        }
        .comment-form textarea {
            min-height: 120px;
            resize: vertical;
        }
        .comment-form button {
            background-color: var(--secondary);
            color: white;
            border: none;
            padding: 14px;
            border-radius: 6px;
            font-weight: 600;
            font-size: 1.1rem;
            cursor: pointer;
            transition: var(--transition);
        }
        .comment-form button:hover {
            background-color: #c0392b;
        }
        .internal-links {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin: 2rem 0;
        }
        .internal-links a {
            background-color: #f0f7ff;
            color: var(--dark);
            text-decoration: none;
            padding: 10px 18px;
            border-radius: 30px;
            font-weight: 600;
            border: 1px solid #cce0ff;
            transition: var(--transition);
        }
        .internal-links a:hover {
            background-color: var(--primary);
            color: white;
            transform: translateY(-3px);
        }
        .site-footer {
            background-color: var(--dark);
            color: white;
            margin-top: 4rem;
            padding: 3rem 20px;
        }
        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 3rem;
        }
        .footer-section h4 {
            color: var(--primary);
            font-size: 1.4rem;
            margin-bottom: 1.5rem;
        }
        friend-link {
            display: block;
            margin: 1rem 0;
            color: #ddd;
            text-decoration: none;
            transition: var(--transition);
            padding: 8px 0;
            border-bottom: 1px solid #3a4a5d;
        }
        friend-link:hover {
            color: var(--primary);
            padding-left: 10px;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #3a4a5d;
            color: #bdc3c7;
            font-size: 0.95rem;
        }
        .update-time {
            background-color: #fff3cd;
            color: #856404;
            padding: 12px 20px;
            border-radius: 6px;
            margin: 2rem 0;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-weight: 600;
        }
        .update-time i {
            font-size: 1.2rem;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .main-nav ul {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background-color: var(--dark);
                padding: 1rem;
                box-shadow: var(--shadow);
            }
            .main-nav.active ul {
                display: flex;
            }
            .main-nav a {
                display: block;
                padding: 1rem;
                border-radius: 6px;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.4rem;
            }
            .article-content {
                padding: 2rem 1.5rem;
            }
            .header-container {
                padding: 0 15px;
            }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .article-content {
            animation: fadeIn 0.8s ease-out;
        }