:root {
            --primary-dark: #2c5530;
            --primary-medium: #5a7d5c;
            --primary-light: #b5c8a9;
            --accent-warm: #d4a762;
            --accent-cool: #8aa1b1;
            --text-dark: #222;
            --text-medium: #444;
            --text-light: #666;
            --bg-light: #f8f5f0;
            --bg-card: #fffef9;
            --shadow: 0 4px 12px rgba(40, 54, 24, 0.08);
            --radius: 8px;
            --transition: all 0.3s ease;
            font-size: 16px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--text-medium);
            background-color: var(--bg-light);
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        a {
            color: var(--primary-medium);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
            text-decoration: underline;
        }
        h1, h2, h3, h4 {
            color: var(--primary-dark);
            font-weight: 700;
            line-height: 1.3;
            margin-top: 1.5em;
            margin-bottom: 0.5em;
        }
        h1 { font-size: 2.8rem; }
        h2 { font-size: 2.2rem; border-bottom: 2px solid var(--accent-warm); padding-bottom: 0.3em; }
        h3 { font-size: 1.8rem; }
        h4 { font-size: 1.4rem; color: var(--primary-medium); }
        p {
            margin-bottom: 1.2em;
            text-align: justify;
        }
        strong { color: var(--primary-dark); }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
        }
        .site-header {
            padding: 1.5rem 0;
            border-bottom: 1px solid var(--primary-light);
            margin-bottom: 2rem;
            background-color: var(--bg-card);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 5px rgba(0,0,0,0.05);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-family: 'Georgia', serif;
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary-dark);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo:hover {
            text-decoration: none;
            color: var(--accent-warm);
        }
        .my-logo i {
            color: var(--accent-warm);
            font-size: 2rem;
        }
        .main-nav {
            display: flex;
            align-items: center;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .nav-links a {
            font-weight: 600;
            color: var(--text-dark);
            padding: 0.5rem 1rem;
            border-radius: var(--radius);
        }
        .nav-links a:hover {
            background-color: var(--primary-light);
            color: var(--primary-dark);
            text-decoration: none;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: var(--primary-dark);
            cursor: pointer;
        }
        .breadcrumb {
            padding: 1rem 0;
            font-size: 0.9rem;
            color: var(--text-light);
            margin-bottom: 2rem;
            border-bottom: 1px dashed var(--primary-light);
        }
        .breadcrumb a {
            color: var(--text-medium);
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin-bottom: 3rem;
        }
        @media (max-width: 900px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        .article-body {
            background-color: var(--bg-card);
            padding: 2.5rem;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .sidebar-widget {
            background-color: var(--bg-card);
            padding: 1.5rem;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .sidebar-widget h3 {
            font-size: 1.3rem;
            margin-top: 0;
            margin-bottom: 1rem;
            color: var(--primary-medium);
        }
        .search-form {
            display: flex;
        }
        .search-form input {
            flex-grow: 1;
            padding: 0.8rem 1rem;
            border: 1px solid var(--primary-light);
            border-right: none;
            border-radius: var(--radius) 0 0 var(--radius);
            font-size: 1rem;
        }
        .search-form button {
            background-color: var(--primary-medium);
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 var(--radius) var(--radius) 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-form button:hover {
            background-color: var(--primary-dark);
        }
        .rating-widget, .comment-widget {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .star-rating {
            display: flex;
            gap: 0.3rem;
            font-size: 1.8rem;
            color: #ffc107;
            margin-bottom: 0.5rem;
        }
        .rating-form, .comment-form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .rating-form select, .comment-form input, .comment-form textarea {
            padding: 0.8rem;
            border: 1px solid var(--primary-light);
            border-radius: var(--radius);
            font-family: inherit;
            font-size: 1rem;
        }
        .comment-form textarea {
            min-height: 120px;
            resize: vertical;
        }
        .form-submit {
            background-color: var(--accent-warm);
            color: white;
            border: none;
            padding: 1rem;
            border-radius: var(--radius);
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }
        .form-submit:hover {
            background-color: var(--primary-dark);
        }
        .article-intro {
            font-size: 1.2rem;
            color: var(--text-dark);
            background: linear-gradient(to right, var(--primary-light), transparent);
            padding: 1.5rem;
            border-left: 5px solid var(--accent-warm);
            margin-bottom: 2.5rem;
            border-radius: 0 var(--radius) var(--radius) 0;
        }
        .key-takeaways {
            background-color: #f0f7f0;
            padding: 1.8rem;
            border-radius: var(--radius);
            margin: 2.5rem 0;
            border: 1px solid var(--primary-light);
        }
        .key-takeaways h3 {
            margin-top: 0;
            color: var(--primary-dark);
        }
        .key-takeaways ul {
            padding-left: 1.5rem;
        }
        .key-takeaways li {
            margin-bottom: 0.8rem;
        }
        .article-image {
            max-width: 100%;
            height: auto;
            border-radius: var(--radius);
            margin: 2rem auto;
            display: block;
            box-shadow: var(--shadow);
            border: 5px solid white;
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: var(--text-light);
            margin-top: 0.5rem;
            font-size: 0.95rem;
        }
        .content-link {
            background-color: #f8f8f8;
            padding: 0.2rem 0.5rem;
            border-radius: 4px;
            border: 1px dashed var(--accent-cool);
        }
        .content-link:hover {
            background-color: #e8f0f8;
            text-decoration: none;
        }
        .update-time {
            display: inline-block;
            background-color: var(--accent-warm);
            color: white;
            padding: 0.3rem 1rem;
            border-radius: 20px;
            font-size: 0.9rem;
            margin: 2rem 0;
            font-weight: 600;
        }
        .site-footer {
            background-color: var(--primary-dark);
            color: #e0e0e0;
            padding: 3rem 0;
            margin-top: 4rem;
            border-radius: var(--radius) var(--radius) 0 0;
        }
        .footer-container {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 2rem;
        }
        .footer-section {
            flex: 1;
            min-width: 250px;
        }
        .footer-section h3 {
            color: var(--primary-light);
            font-size: 1.3rem;
            margin-bottom: 1.5rem;
            border-bottom: 1px solid var(--primary-medium);
            padding-bottom: 0.5rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #c0c0c0;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            margin: 1rem 0;
            padding: 1rem;
            background-color: rgba(255,255,255,0.1);
            border-radius: var(--radius);
            border-left: 4px solid var(--accent-warm);
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid var(--primary-medium);
            font-size: 0.9rem;
            color: #aaa;
            grid-column: 1 / -1;
        }
        @media (max-width: 768px) {
            :root { font-size: 15px; }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            .header-container {
                flex-direction: column;
                align-items: flex-start;
                gap: 1rem;
            }
            .main-nav {
                width: 100%;
                justify-content: space-between;
            }
            .nav-links {
                display: none;
                flex-direction: column;
                width: 100%;
                gap: 0;
                margin-top: 1rem;
            }
            .nav-links.active {
                display: flex;
            }
            .nav-links li {
                width: 100%;
            }
            .nav-links a {
                display: block;
                padding: 1rem;
                border-bottom: 1px solid #eee;
            }
            .hamburger {
                display: block;
            }
            .article-body {
                padding: 1.5rem;
            }
            .sidebar-widget {
                padding: 1.2rem;
            }
        }