:root {
            --primary: #4a6fa5; 
            --secondary: #e8b923; 
            --accent: #8b4513; 
            --light: #f8f5e9;
            --dark: #2c3e50;
            --success: #7bc043;
            --shadow: 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: var(--light);
            background-image: url('data:image/svg+xml;utf8,<svg width="100" height="100" viewBox="0 0 100 100" xmlns="http://www.w3.org/2000/svg"><path d="M0,0 L100,0 L100,100 Z" fill="%234a6fa5" opacity="0.03"/></svg>');
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent);
            text-decoration: underline;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, var(--dark) 0%, var(--primary) 100%);
            color: white;
            padding: 1rem 0;
            box-shadow: 0 4px 12px var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-family: 'Georgia', serif;
            font-size: 2.2rem;
            font-weight: bold;
            color: var(--secondary);
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
            letter-spacing: 1px;
        }
        .my-logo span {
            color: white;
            font-weight: normal;
        }
        .my-logo:hover {
            transform: scale(1.02);
            text-decoration: none;
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: #f1f1f1;
            font-size: 0.9rem;
            border-bottom: 1px solid #ddd;
        }
        .breadcrumb a {
            color: var(--accent);
        }
        .breadcrumb i {
            margin: 0 8px;
            color: #888;
        }
        nav {
            display: flex;
            align-items: center;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .nav-links a {
            color: white;
            font-weight: 500;
            padding: 0.5rem 0;
            border-bottom: 2px solid transparent;
        }
        .nav-links a:hover, .nav-links a.active {
            color: var(--secondary);
            border-bottom-color: var(--secondary);
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 5px;
        }
        .search-container {
            margin: 2rem 0;
            background: white;
            padding: 1.5rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px var(--shadow);
        }
        .search-form {
            display: flex;
            gap: 10px;
        }
        .search-form input {
            flex: 1;
            padding: 12px 15px;
            border: 2px solid #ddd;
            border-radius: 6px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .search-form input:focus {
            border-color: var(--primary);
            outline: none;
            box-shadow: 0 0 0 3px rgba(74, 111, 165, 0.2);
        }
        .search-form button {
            background: var(--primary);
            color: white;
            border: none;
            padding: 0 25px;
            border-radius: 6px;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .search-form button:hover {
            background: var(--dark);
        }
        main {
            padding: 2rem 0;
        }
        article {
            background: white;
            border-radius: 12px;
            padding: 2.5rem;
            box-shadow: 0 5px 20px var(--shadow);
            margin-bottom: 2rem;
        }
        h1 {
            color: var(--dark);
            font-size: 2.8rem;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid var(--secondary);
            padding-bottom: 15px;
        }
        h2 {
            color: var(--primary);
            font-size: 2rem;
            margin: 2.5rem 0 1.2rem 0;
            padding-bottom: 8px;
            border-bottom: 1px dashed #ddd;
        }
        h3 {
            color: var(--accent);
            font-size: 1.6rem;
            margin: 2rem 0 1rem 0;
        }
        h4 {
            color: #555;
            font-size: 1.3rem;
            margin: 1.5rem 0 0.8rem 0;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .intro {
            font-size: 1.2rem;
            color: var(--dark);
            background: #f9f7f0;
            padding: 1.5rem;
            border-left: 5px solid var(--secondary);
            border-radius: 0 8px 8px 0;
            margin-bottom: 2.5rem;
        }
        .highlight {
            background: linear-gradient(120deg, rgba(232, 185, 35, 0.15) 0%, rgba(232, 185, 35, 0.05) 100%);
            padding: 1.8rem;
            border-radius: 10px;
            margin: 2rem 0;
            border-left: 4px solid var(--secondary);
        }
        .highlight p:last-child {
            margin-bottom: 0;
        }
        .article-img {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: 10px;
            margin: 2rem auto;
            display: block;
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
            transition: var(--transition);
        }
        .article-img:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 25px rgba(0,0,0,0.2);
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: #666;
            margin-top: 0.5rem;
            font-size: 0.95rem;
        }
        ul, ol {
            margin-left: 2rem;
            margin-bottom: 1.5rem;
        }
        li {
            margin-bottom: 0.5rem;
        }
        .content-link {
            font-weight: 600;
            border-bottom: 1px dotted var(--primary);
        }
        .content-link:hover {
            border-bottom-style: solid;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            margin: 2rem 0;
            box-shadow: 0 0 10px var(--shadow);
        }
        th {
            background: var(--primary);
            color: white;
            padding: 1rem;
            text-align: left;
        }
        td {
            padding: 1rem;
            border-bottom: 1px solid #eee;
        }
        tr:nth-child(even) {
            background: #f9f9f9;
        }
        tr:hover {
            background: #f1f5f9;
        }
        .interaction-section {
            background: #f8f9fa;
            border-radius: 10px;
            padding: 2rem;
            margin: 3rem 0;
            border: 1px solid #e9ecef;
        }
        .interaction-section h3 {
            margin-top: 0;
            color: var(--primary);
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #555;
        }
        input, textarea, select {
            width: 100%;
            padding: 12px;
            border: 1px solid #ced4da;
            border-radius: 6px;
            font-family: inherit;
            font-size: 1rem;
            transition: var(--transition);
        }
        input:focus, textarea:focus, select:focus {
            border-color: var(--primary);
            outline: none;
            box-shadow: 0 0 0 3px rgba(74, 111, 165, 0.2);
        }
        .rating {
            display: flex;
            gap: 10px;
            margin: 1rem 0;
        }
        .rating input {
            display: none;
        }
        .rating label {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .rating label:hover,
        .rating label:hover ~ label,
        .rating input:checked ~ label {
            color: var(--secondary);
        }
        button[type="submit"] {
            background: var(--primary);
            color: white;
            border: none;
            padding: 12px 30px;
            border-radius: 6px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition);
        }
        button[type="submit"]:hover {
            background: var(--dark);
            transform: translateY(-2px);
        }
        footer {
            background: var(--dark);
            color: #ddd;
            padding: 3rem 0 2rem;
            margin-top: 3rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        .footer-section h4 {
            color: white;
            margin-bottom: 1.5rem;
            font-size: 1.3rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #bbb;
        }
        .footer-links a:hover {
            color: var(--secondary);
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background: rgba(255,255,255,0.05);
            padding: 1rem;
            border-radius: 6px;
            margin-bottom: 0.8rem;
            border-left: 3px solid var(--secondary);
        }
        friend-link a {
            color: white;
            font-weight: 500;
        }
        .copyright {
            text-align: center;
            margin-top: 3rem;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: #aaa;
            font-size: 0.9rem;
        }
        .update-time {
            font-style: italic;
            color: #888;
            font-size: 0.9rem;
            text-align: right;
            margin-top: 2rem;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.4rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.4rem; }
            .nav-links {
                gap: 1.5rem;
            }
        }
        @media (max-width: 768px) {
            .header-container {
                flex-wrap: wrap;
            }
            .hamburger {
                display: block;
                order: 1;
            }
            .my-logo {
                order: 0;
                font-size: 1.8rem;
            }
            nav {
                order: 2;
                flex-basis: 100%;
                margin-top: 1rem;
                display: none;
            }
            .nav-active {
                display: block;
            }
            .nav-links {
                flex-direction: column;
                gap: 0;
                background: rgba(44, 62, 80, 0.98);
                border-radius: 8px;
                padding: 1rem 0;
            }
            .nav-links li {
                text-align: center;
                padding: 0.8rem;
                border-bottom: 1px solid rgba(255,255,255,0.1);
            }
            .nav-links li:last-child {
                border-bottom: none;
            }
            article {
                padding: 1.5rem;
            }
            .footer-container {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 576px) {
            .container {
                padding: 0 15px;
            }
            h1 { font-size: 2rem; }
            h2 { font-size: 1.6rem; }
            .search-form {
                flex-direction: column;
            }
            .search-form button {
                padding: 12px;
            }
            .rating label {
                font-size: 1.8rem;
            }
        }
        @media print {
            header, footer, .search-container, .interaction-section, .breadcrumb {
                display: none;
            }
            body {
                background: white;
                color: black;
            }
            article {
                box-shadow: none;
                padding: 0;
            }
            a {
                color: black;
                text-decoration: underline;
            }
        }