* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary-color: #2a5c3d; 
            --secondary-color: #8b4513; 
            --accent-color: #c19a6b; 
            --text-color: #333;
            --light-bg: #f8f5f0;
            --dark-bg: #1a1a1a;
            --border-color: #ddd;
            --hover-color: #1e4a2f;
            --font-main: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            --font-heading: Georgia, 'Times New Roman', Times, serif;
            --spacing-xs: 0.5rem;
            --spacing-sm: 1rem;
            --spacing-md: 2rem;
            --spacing-lg: 3rem;
            --spacing-xl: 5rem;
            --border-radius: 8px;
            --box-shadow: 0 4px 12px rgba(0,0,0,0.08);
            --transition: all 0.3s ease;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-main);
            color: var(--text-color);
            line-height: 1.7;
            background-color: var(--light-bg);
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--spacing-sm);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--border-radius);
        }
        .site-header {
            background-color: white;
            box-shadow: var(--box-shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: var(--spacing-sm) 0;
        }
        .my-logo {
            font-family: var(--font-heading);
            font-size: 2.2rem;
            font-weight: bold;
            color: var(--primary-color);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
            transition: var(--transition);
        }
        .my-logo:hover {
            color: var(--hover-color);
            transform: scale(1.02);
        }
        .my-logo i {
            color: var(--accent-color);
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: var(--spacing-md);
        }
        .main-nav a {
            text-decoration: none;
            color: var(--text-color);
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
            transition: var(--transition);
        }
        .main-nav a:hover {
            color: var(--primary-color);
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--primary-color);
            transition: width 0.3s ease;
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            cursor: pointer;
            gap: 4px;
        }
        .hamburger span {
            width: 25px;
            height: 3px;
            background-color: var(--primary-color);
            border-radius: 2px;
            transition: var(--transition);
        }
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(7px, -6px);
        }
        .breadcrumb {
            background-color: #f0ede6;
            padding: var(--spacing-sm) 0;
            margin-bottom: var(--spacing-md);
        }
        .breadcrumb ul {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .breadcrumb li {
            display: flex;
            align-items: center;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '/';
            margin-left: 0.5rem;
            color: #888;
        }
        .breadcrumb a {
            color: var(--secondary-color);
            text-decoration: none;
            transition: var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--primary-color);
            text-decoration: underline;
        }
        main {
            flex: 1;
            padding: var(--spacing-md) 0;
        }
        .article-header {
            margin-bottom: var(--spacing-xl);
            text-align: center;
            padding-bottom: var(--spacing-lg);
            border-bottom: 2px solid var(--accent-color);
        }
        h1 {
            font-family: var(--font-heading);
            font-size: clamp(2.2rem, 5vw, 3.5rem);
            color: var(--primary-color);
            margin-bottom: var(--spacing-sm);
            line-height: 1.2;
        }
        .article-meta {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: var(--spacing-md);
            color: #666;
            font-size: 0.9rem;
            margin-top: var(--spacing-md);
        }
        .last-updated {
            background-color: #e8f4ea;
            padding: 0.5rem 1rem;
            border-radius: 20px;
            font-weight: 600;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: var(--spacing-lg);
        }
        article {
            background-color: white;
            padding: var(--spacing-lg);
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
        }
        h2 {
            font-family: var(--font-heading);
            color: var(--secondary-color);
            margin: var(--spacing-lg) 0 var(--spacing-sm);
            padding-bottom: 0.5rem;
            border-bottom: 1px solid var(--border-color);
            font-size: 2rem;
        }
        h3 {
            color: var(--primary-color);
            margin: var(--spacing-md) 0 var(--spacing-xs);
            font-size: 1.6rem;
        }
        h4 {
            color: var(--accent-color);
            margin: var(--spacing-sm) 0 var(--spacing-xs);
            font-size: 1.3rem;
        }
        p {
            margin-bottom: var(--spacing-sm);
            text-align: justify;
        }
        .intro {
            font-size: 1.2rem;
            color: #444;
            background-color: #f9f7f3;
            padding: var(--spacing-sm);
            border-left: 4px solid var(--accent-color);
            margin-bottom: var(--spacing-md);
        }
        emoji {
            font-style: normal;
            margin-right: 5px;
        }
        .highlight {
            background-color: #fff9e6;
            padding: 2px 6px;
            border-radius: 4px;
            font-weight: 600;
        }
        .key-point {
            background-color: #f0f7ff;
            border-left: 4px solid #4a90e2;
            padding: var(--spacing-sm);
            margin: var(--spacing-sm) 0;
        }
        .image-container {
            margin: var(--spacing-lg) auto;
            text-align: center;
        }
        .image-container figcaption {
            margin-top: 0.5rem;
            font-style: italic;
            color: #666;
            font-size: 0.9rem;
        }
        aside {
            background-color: white;
            padding: var(--spacing-md);
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            height: fit-content;
            position: sticky;
            top: 120px;
        }
        .sidebar-widget {
            margin-bottom: var(--spacing-lg);
        }
        .sidebar-widget h3 {
            font-size: 1.3rem;
            margin-bottom: var(--spacing-sm);
            color: var(--secondary-color);
        }
        .search-form {
            display: flex;
            margin-bottom: var(--spacing-sm);
        }
        .search-form input {
            flex: 1;
            padding: 0.8rem;
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius) 0 0 var(--border-radius);
            font-size: 1rem;
        }
        .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(--hover-color);
        }
        .rating-widget, .comment-widget {
            background-color: #f9f9f9;
            padding: var(--spacing-sm);
            border-radius: var(--border-radius);
        }
        .stars {
            display: flex;
            gap: 5px;
            margin: var(--spacing-xs) 0;
        }
        .stars i {
            color: #ffc107;
            cursor: pointer;
            transition: var(--transition);
        }
        .stars i:hover {
            transform: scale(1.2);
        }
        textarea, input[type="text"], input[type="email"] {
            width: 100%;
            padding: 0.8rem;
            margin-bottom: var(--spacing-sm);
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius);
            font-family: var(--font-main);
        }
        .btn {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
            display: inline-block;
            text-decoration: none;
            text-align: center;
        }
        .btn:hover {
            background-color: var(--hover-color);
            transform: translateY(-2px);
        }
        .btn-block {
            display: block;
            width: 100%;
        }
        footer {
            background-color: var(--dark-bg);
            color: #eee;
            margin-top: var(--spacing-xl);
            padding: var(--spacing-xl) 0 var(--spacing-md);
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: var(--spacing-lg);
        }
        .footer-widget h3 {
            color: #fff;
            margin-bottom: var(--spacing-sm);
            font-size: 1.3rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.7rem;
        }
        .footer-links a {
            color: #ccc;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--accent-color);
            padding-left: 5px;
        }
        friend-link {
            display: inline-block;
            background-color: #333;
            color: #fff;
            padding: 0.5rem 1rem;
            margin: 0.3rem;
            border-radius: 4px;
            text-decoration: none;
            transition: var(--transition);
        }
        friend-link:hover {
            background-color: var(--primary-color);
        }
        .copyright {
            text-align: center;
            margin-top: var(--spacing-lg);
            padding-top: var(--spacing-md);
            border-top: 1px solid #444;
            color: #aaa;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
            aside {
                position: static;
            }
        }
        @media (max-width: 768px) {
            .main-nav {
                position: fixed;
                top: 80px;
                left: -100%;
                width: 100%;
                background-color: white;
                box-shadow: var(--box-shadow);
                padding: var(--spacing-md);
                transition: left 0.5s ease;
                z-index: 999;
            }
            .main-nav.active {
                left: 0;
            }
            .main-nav ul {
                flex-direction: column;
                gap: var(--spacing-sm);
            }
            .hamburger {
                display: flex;
            }
            .header-container {
                padding: 1rem 0;
            }
            article, aside {
                padding: var(--spacing-md);
            }
            .article-meta {
                flex-direction: column;
                gap: var(--spacing-sm);
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.7rem;
            }
            h3 {
                font-size: 1.4rem;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 var(--spacing-xs);
            }
            article, aside {
                padding: var(--spacing-sm);
            }
            .btn {
                padding: 0.7rem 1rem;
            }
        }