:root {
            --primary-green: #6aaa64;
            --secondary-yellow: #c9b458;
            --dark-gray: #787c7e;
            --light-gray: #d3d6da;
            --bg-white: #ffffff;
            --text-dark: #121212;
            --text-light: #f8f9fa;
            --accent-blue: #3498db;
            --spacing-xs: 0.5rem;
            --spacing-sm: 1rem;
            --spacing-md: 2rem;
            --spacing-lg: 4rem;
            --border-radius: 5px;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --max-content-width: 1200px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            font-size: 16px;
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.7;
            color: var(--text-dark);
            background-color: var(--bg-white);
            overflow-x: hidden;
        }
        a {
            color: var(--accent-blue);
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: var(--primary-green);
        }
        .site-header {
            background-color: var(--bg-white);
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
            padding: var(--spacing-sm) 0;
        }
        .header-container {
            max-width: var(--max-content-width);
            margin: 0 auto;
            padding: 0 var(--spacing-sm);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary-green);
            letter-spacing: -0.5px;
        }
        .my-logo span {
            color: var(--secondary-yellow);
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: var(--spacing-md);
        }
        .main-nav a {
            font-weight: 600;
            color: var(--text-dark);
            padding: 0.5rem;
            border-radius: var(--border-radius);
        }
        .main-nav a:hover,
        .main-nav a:focus {
            background-color: var(--light-gray);
            color: var(--primary-green);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: var(--dark-gray);
            cursor: pointer;
        }
        .breadcrumb {
            max-width: var(--max-content-width);
            margin: var(--spacing-sm) auto;
            padding: 0 var(--spacing-sm);
            font-size: 0.9rem;
            color: var(--dark-gray);
        }
        .breadcrumb a {
            color: var(--dark-gray);
        }
        .main-content {
            max-width: var(--max-content-width);
            margin: 0 auto;
            padding: var(--spacing-md) var(--spacing-sm);
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: var(--spacing-lg);
        }
        .article-content {
            grid-column: 1 / 2;
        }
        .sidebar {
            grid-column: 2 / 3;
        }
        h1 {
            font-size: 2.8rem;
            line-height: 1.2;
            margin-bottom: var(--spacing-md);
            color: var(--text-dark);
        }
        h2 {
            font-size: 2rem;
            margin-top: var(--spacing-lg);
            margin-bottom: var(--spacing-sm);
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--light-gray);
            color: var(--primary-green);
        }
        h3 {
            font-size: 1.5rem;
            margin-top: var(--spacing-md);
            margin-bottom: var(--spacing-xs);
            color: var(--secondary-yellow);
        }
        h4 {
            font-size: 1.2rem;
            margin-top: var(--spacing-sm);
            margin-bottom: var(--spacing-xs);
            color: var(--dark-gray);
        }
        p {
            margin-bottom: var(--spacing-sm);
            text-align: justify;
        }
        strong {
            font-weight: 700;
            color: var(--text-dark);
        }
        em {
            font-style: italic;
        }
        blockquote {
            border-left: 4px solid var(--primary-green);
            padding-left: var(--spacing-sm);
            margin: var(--spacing-md) 0;
            font-style: italic;
            color: var(--dark-gray);
            background-color: #f9f9f9;
            padding: var(--spacing-sm);
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .highlight-box {
            background-color: #f0f7ff;
            border-left: 4px solid var(--accent-blue);
            padding: var(--spacing-sm);
            margin: var(--spacing-md) 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .article-image {
            width: 100%;
            max-width: 800px;
            height: auto;
            margin: var(--spacing-md) auto;
            display: block;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .search-box, .comment-form, .rating-form {
            background-color: #f8f9fa;
            padding: var(--spacing-md);
            border-radius: var(--border-radius);
            margin-bottom: var(--spacing-md);
            box-shadow: var(--shadow);
        }
        .form-group {
            margin-bottom: var(--spacing-sm);
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        input[type="text"],
        input[type="email"],
        textarea,
        select {
            width: 100%;
            padding: 0.75rem;
            border: 1px solid var(--light-gray);
            border-radius: var(--border-radius);
            font-size: 1rem;
            transition: border 0.3s;
        }
        input:focus,
        textarea:focus,
        select:focus {
            outline: none;
            border-color: var(--primary-green);
        }
        button[type="submit"] {
            background-color: var(--primary-green);
            color: white;
            border: none;
            padding: 0.75rem 1.5rem;
            border-radius: var(--border-radius);
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background-color 0.3s;
        }
        button[type="submit"]:hover {
            background-color: #5a9954;
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 0.5rem;
            margin: 0.5rem 0;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 1.8rem;
            color: var(--light-gray);
            cursor: pointer;
            transition: color 0.2s;
        }
        .star-rating input:checked ~ label,
        .star-rating label:hover,
        .star-rating label:hover ~ label {
            color: var(--secondary-yellow);
        }
        .sidebar-widget {
            background-color: #f8f9fa;
            padding: var(--spacing-md);
            border-radius: var(--border-radius);
            margin-bottom: var(--spacing-md);
            box-shadow: var(--shadow);
        }
        .widget-title {
            font-size: 1.3rem;
            margin-bottom: var(--spacing-sm);
            color: var(--primary-green);
            border-bottom: 1px solid var(--light-gray);
            padding-bottom: 0.5rem;
        }
        .related-links {
            list-style: none;
        }
        .related-links li {
            margin-bottom: 0.75rem;
            padding-left: 1.5rem;
            position: relative;
        }
        .related-links li:before {
            content: "🔗";
            position: absolute;
            left: 0;
            top: 0.2rem;
        }
        .site-footer {
            background-color: #1a1a1a;
            color: var(--text-light);
            padding: var(--spacing-lg) 0 var(--spacing-md);
            margin-top: var(--spacing-lg);
        }
        .footer-container {
            max-width: var(--max-content-width);
            margin: 0 auto;
            padding: 0 var(--spacing-sm);
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: var(--spacing-md);
        }
        .footer-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary-green);
            margin-bottom: var(--spacing-sm);
        }
        .footer-links a {
            color: #ccc;
            display: block;
            margin-bottom: 0.5rem;
        }
        .footer-links a:hover {
            color: var(--primary-green);
        }
        friend-link {
            display: block;
            margin: 0.5rem 0;
            color: var(--accent-blue);
        }
        .copyright {
            text-align: center;
            padding-top: var(--spacing-md);
            margin-top: var(--spacing-md);
            border-top: 1px solid #333;
            color: #aaa;
            font-size: 0.9rem;
        }
        .update-time {
            font-style: italic;
            color: var(--dark-gray);
            background-color: #f9f9f9;
            padding: var(--spacing-xs) var(--spacing-sm);
            border-radius: var(--border-radius);
            display: inline-block;
            margin-bottom: var(--spacing-sm);
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
            .sidebar {
                grid-column: 1 / 2;
            }
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.7rem;
            }
            .main-nav ul {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background-color: var(--bg-white);
                box-shadow: var(--shadow);
                padding: var(--spacing-sm);
            }
            .main-nav.active ul {
                display: flex;
            }
            .hamburger {
                display: block;
            }
            .header-container {
                flex-wrap: wrap;
            }
            .footer-container {
                grid-template-columns: 1fr;
                text-align: center;
            }
        }