:root {
            --primary-color: #1a365d; 
            --secondary-color: #d4af37; 
            --accent-color: #c53030; 
            --light-color: #f7fafc;
            --dark-color: #2d3748;
            --text-color: #2d3748;
            --text-light: #718096;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
            --border-radius: 8px;
            --max-width: 1200px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--text-color);
            background-color: var(--light-color);
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a {
            color: var(--primary-color);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent-color);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background-color: #fff;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .my-logo {
            font-family: Georgia, serif;
            font-size: 2.2rem;
            font-weight: bold;
            color: var(--primary-color);
            display: flex;
            align-items: center;
        }
        .my-logo span:first-child { color: var(--secondary-color); }
        .my-logo span:last-child { color: var(--accent-color); }
        .my-logo:hover {
            transform: scale(1.02);
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 30px;
        }
        .main-nav a {
            font-weight: 600;
            padding: 8px 12px;
            border-radius: var(--border-radius);
        }
        .main-nav a:hover {
            background-color: var(--primary-color);
            color: white;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: var(--primary-color);
            cursor: pointer;
        }
        .breadcrumb {
            background-color: #edf2f7;
            padding: 12px 0;
            margin-bottom: 30px;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 10px;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '›';
            margin-left: 10px;
            color: var(--text-light);
        }
        .search-container {
            background: linear-gradient(135deg, var(--primary-color), #2a4365);
            color: white;
            padding: 40px 0;
            text-align: center;
            margin-bottom: 40px;
            border-radius: var(--border-radius);
        }
        .search-form {
            max-width: 600px;
            margin: 20px auto 0;
            display: flex;
        }
        .search-form input {
            flex-grow: 1;
            padding: 15px 20px;
            border: none;
            border-radius: var(--border-radius) 0 0 var(--border-radius);
            font-size: 1rem;
        }
        .search-form button {
            background-color: var(--secondary-color);
            color: var(--primary-color);
            border: none;
            padding: 0 25px;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            cursor: pointer;
            font-weight: bold;
            transition: var(--transition);
        }
        .search-form button:hover {
            background-color: #e6c340;
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            flex-grow: 1;
            padding-bottom: 40px;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        article {
            background: white;
            padding: 40px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        h1 {
            color: var(--primary-color);
            font-size: 2.8rem;
            margin-bottom: 20px;
            line-height: 1.2;
            border-bottom: 3px solid var(--secondary-color);
            padding-bottom: 15px;
        }
        h2 {
            color: var(--primary-color);
            font-size: 2rem;
            margin: 40px 0 20px;
            padding-top: 10px;
            border-top: 1px solid #e2e8f0;
        }
        h3 {
            color: var(--dark-color);
            font-size: 1.6rem;
            margin: 30px 0 15px;
        }
        h4 {
            color: var(--text-light);
            font-size: 1.3rem;
            margin: 25px 0 12px;
        }
        p {
            margin-bottom: 1.5em;
            text-align: justify;
        }
        .intro {
            font-size: 1.2rem;
            font-weight: 500;
            color: var(--primary-color);
            background-color: #ebf8ff;
            padding: 20px;
            border-left: 5px solid var(--secondary-color);
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            margin-bottom: 30px;
        }
        .highlight {
            background-color: #fffacd;
            padding: 3px 6px;
            border-radius: 3px;
            font-weight: 600;
        }
        .quote {
            font-style: italic;
            border-left: 4px solid var(--secondary-color);
            padding-left: 20px;
            margin: 30px;
            color: var(--text-light);
        }
        .img-container {
            margin: 30px auto;
            text-align: center;
            max-width: 800px;
        }
        .img-container img {
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .img-container img:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.15);
        }
        .img-caption {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-top: 10px;
            font-style: italic;
        }
        ul, ol {
            margin-left: 30px;
            margin-bottom: 1.5em;
        }
        .internal-links {
            background-color: #f0fff4;
            padding: 25px;
            border-radius: var(--border-radius);
            margin: 30px 0;
            border: 1px solid #c6f6d5;
        }
        .internal-links h3 {
            margin-top: 0;
            color: #22543d;
        }
        .internal-links ul {
            list-style: none;
            margin: 0;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 10px;
        }
        .internal-links li {
            margin-bottom: 8px;
        }
        .internal-links a {
            display: block;
            padding: 10px 15px;
            background-color: white;
            border-radius: 5px;
            border: 1px solid #9ae6b4;
        }
        .internal-links a:hover {
            background-color: #c6f6d5;
        }
        .sidebar {
            background: white;
            padding: 25px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            align-self: start;
        }
        .sidebar-widget {
            margin-bottom: 30px;
        }
        .sidebar-widget h3 {
            font-size: 1.4rem;
            margin-bottom: 15px;
            color: var(--primary-color);
            padding-bottom: 8px;
            border-bottom: 2px solid var(--secondary-color);
        }
        .user-interaction {
            background: white;
            padding: 40px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            margin-top: 40px;
        }
        .form-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
        }
        @media (max-width: 768px) {
            .form-grid {
                grid-template-columns: 1fr;
            }
        }
        .form-group {
            margin-bottom: 20px;
        }
        label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
        }
        input, textarea, select {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid #cbd5e0;
            border-radius: var(--border-radius);
            font-family: inherit;
            font-size: 1rem;
        }
        textarea {
            min-height: 150px;
            resize: vertical;
        }
        .stars {
            display: flex;
            gap: 10px;
            font-size: 1.8rem;
            color: #e2e8f0;
            margin: 10px 0;
        }
        .stars input {
            display: none;
        }
        .stars label {
            cursor: pointer;
            transition: var(--transition);
        }
        .stars label:hover,
        .stars label:hover ~ label {
            color: #f6e05e;
        }
        .stars input:checked ~ label {
            color: #f6e05e;
        }
        .btn {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 15px 30px;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-weight: bold;
            font-size: 1rem;
            transition: var(--transition);
            display: inline-block;
            text-align: center;
        }
        .btn:hover {
            background-color: var(--accent-color);
            transform: translateY(-3px);
        }
        .btn-gold {
            background-color: var(--secondary-color);
            color: var(--primary-color);
        }
        .site-footer {
            background-color: var(--primary-color);
            color: white;
            padding: 50px 0 20px;
            margin-top: 60px;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-widget h3 {
            color: var(--secondary-color);
            margin-bottom: 20px;
            font-size: 1.4rem;
        }
        friend-link {
            display: block;
            margin-bottom: 10px;
        }
        friend-link a {
            color: #cbd5e0;
        }
        friend-link a:hover {
            color: white;
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #4a5568;
            color: #a0aec0;
            font-size: 0.9rem;
        }
        .update-time {
            background-color: #fefcbf;
            color: #744210;
            padding: 10px 15px;
            border-radius: var(--border-radius);
            margin: 20px 0;
            display: inline-block;
            font-weight: 600;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .main-nav {
                position: fixed;
                top: 80px;
                left: 0;
                width: 100%;
                background-color: white;
                box-shadow: var(--shadow);
                transform: translateY(-150%);
                opacity: 0;
                transition: var(--transition);
                visibility: hidden;
            }
            .main-nav.active {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }
            .main-nav ul {
                flex-direction: column;
                padding: 20px;
                gap: 10px;
            }
            .main-nav a {
                display: block;
                padding: 15px;
                border: 1px solid #e2e8f0;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            article, .sidebar, .user-interaction {
                padding: 25px;
            }
        }