:root {
            --ucl-blue: #00529F;
            --ucl-silver: #C0C0C0;
            --ucl-black: #111;
            --ucl-white: #F5F5F5;
            --accent-gold: #D4AF37;
            --text-primary: #333;
            --text-secondary: #666;
            --bg-light: #fafafa;
            --border-color: #e0e0e0;
            --shadow: 0 4px 12px rgba(0, 82, 159, 0.1);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.8;
            color: var(--text-primary);
            background-color: var(--bg-light);
            max-width: 1920px;
            margin: 0 auto;
            overflow-x: hidden;
        }
        .site-header {
            background: linear-gradient(135deg, var(--ucl-blue) 0%, var(--ucl-black) 100%);
            color: var(--ucl-white);
            padding: 1rem 2rem;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            max-width: 1400px;
            margin: 0 auto;
        }
        .my-logo {
            font-family: 'Impact', 'Arial Black', sans-serif;
            font-size: 2.5rem;
            font-weight: bold;
            text-decoration: none;
            color: var(--ucl-white);
            display: flex;
            align-items: center;
            gap: 10px;
            transition: var(--transition);
        }
        .my-logo:hover {
            color: var(--accent-gold);
            transform: scale(1.03);
        }
        .my-logo i {
            color: var(--accent-gold);
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: var(--ucl-white);
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .main-nav a:hover {
            background-color: rgba(255, 255, 255, 0.15);
            color: var(--accent-gold);
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: var(--ucl-white);
            cursor: pointer;
        }
        .breadcrumb {
            background-color: rgba(255, 255, 255, 0.05);
            padding: 0.8rem 2rem;
            font-size: 0.9rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .breadcrumb a {
            color: var(--ucl-silver);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            color: var(--accent-gold);
            text-decoration: underline;
        }
        .search-container {
            padding: 2rem;
            background: linear-gradient(to right, #f8f9fa, #e9ecef);
            text-align: center;
            border-bottom: 2px solid var(--border-color);
        }
        .search-form {
            max-width: 600px;
            margin: 0 auto;
            display: flex;
            gap: 0;
            box-shadow: var(--shadow);
            border-radius: 50px;
            overflow: hidden;
        }
        .search-input {
            flex: 1;
            padding: 1rem 1.5rem;
            border: none;
            font-size: 1.1rem;
            outline: none;
        }
        .search-btn {
            background-color: var(--ucl-blue);
            color: white;
            border: none;
            padding: 1rem 2rem;
            font-weight: bold;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-btn:hover {
            background-color: var(--accent-gold);
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            max-width: 1400px;
            margin: 2rem auto;
            padding: 0 2rem;
        }
        .article-container {
            background: white;
            border-radius: 12px;
            padding: 3rem;
            box-shadow: var(--shadow);
        }
        .article-header {
            border-bottom: 3px solid var(--ucl-blue);
            padding-bottom: 2rem;
            margin-bottom: 3rem;
        }
        h1 {
            font-size: 3.2rem;
            color: var(--ucl-blue);
            margin-bottom: 1.5rem;
            line-height: 1.2;
        }
        .article-meta {
            display: flex;
            justify-content: space-between;
            color: var(--text-secondary);
            font-size: 0.95rem;
            margin-bottom: 1rem;
        }
        .update-time {
            color: #d9534f;
            font-weight: bold;
        }
        h2 {
            font-size: 2.2rem;
            color: var(--ucl-black);
            margin: 3rem 0 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--ucl-silver);
        }
        h3 {
            font-size: 1.8rem;
            color: var(--ucl-blue);
            margin: 2.5rem 0 1rem;
        }
        h4 {
            font-size: 1.4rem;
            color: var(--text-secondary);
            margin: 2rem 0 1rem;
        }
        p {
            margin-bottom: 1.8rem;
            font-size: 1.15rem;
            text-align: justify;
        }
        .intro-text {
            font-size: 1.3rem;
            color: var(--ucl-blue);
            font-weight: 500;
            background: #f0f8ff;
            padding: 1.5rem;
            border-left: 5px solid var(--accent-gold);
            border-radius: 0 8px 8px 0;
            margin-bottom: 2.5rem;
        }
        .highlight {
            background: linear-gradient(120deg, #fffacd 0%, #fffacd 100%);
            padding: 0.2rem 0.5rem;
            border-radius: 3px;
            font-weight: 600;
        }
        .feature-img {
            width: 100%;
            max-height: 500px;
            object-fit: cover;
            border-radius: 12px;
            margin: 2rem 0;
            box-shadow: 0 8px 25px rgba(0,0,0,0.15);
            border: 5px solid white;
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: var(--text-secondary);
            margin-top: -1rem;
            margin-bottom: 2rem;
            font-size: 0.95rem;
        }
        .content-link {
            color: var(--ucl-blue);
            text-decoration: none;
            font-weight: 600;
            border-bottom: 2px dotted var(--ucl-blue);
            transition: var(--transition);
        }
        .content-link:hover {
            color: var(--accent-gold);
            border-bottom: 2px solid var(--accent-gold);
        }
        blockquote {
            border-left: 5px solid var(--accent-gold);
            padding: 1.5rem 2rem;
            margin: 2.5rem 0;
            background: #f9f9f9;
            font-style: italic;
            font-size: 1.25rem;
            color: var(--text-primary);
            border-radius: 0 8px 8px 0;
        }
        ul, ol {
            margin-left: 2rem;
            margin-bottom: 1.8rem;
        }
        li {
            margin-bottom: 0.8rem;
        }
        .stats-box {
            background: linear-gradient(to bottom right, #e3f2fd, #f3e5f5);
            padding: 2rem;
            border-radius: 12px;
            margin: 2.5rem 0;
            border-left: 6px solid var(--ucl-blue);
        }
        .stats-box h3 {
            margin-top: 0;
            color: #5e35b1;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .sidebar-widget {
            background: white;
            padding: 1.8rem;
            border-radius: 12px;
            box-shadow: var(--shadow);
        }
        .widget-title {
            font-size: 1.4rem;
            color: var(--ucl-blue);
            margin-bottom: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--border-color);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .related-links {
            list-style: none;
            margin-left: 0;
        }
        .related-links li {
            margin-bottom: 1rem;
            padding-bottom: 1rem;
            border-bottom: 1px dashed var(--border-color);
        }
        .related-links a {
            color: var(--text-primary);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
            transition: var(--transition);
        }
        .related-links a:hover {
            color: var(--ucl-blue);
            transform: translateX(5px);
        }
        .video-container {
            position: relative;
            padding-bottom: 56.25%;
            height: 0;
            overflow: hidden;
            border-radius: 8px;
            margin-top: 1rem;
        }
        .video-container iframe {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            border: none;
        }
        .interaction-section {
            margin-top: 4rem;
            background: white;
            border-radius: 12px;
            padding: 3rem;
            box-shadow: var(--shadow);
        }
        .interaction-tabs {
            display: flex;
            border-bottom: 2px solid var(--border-color);
            margin-bottom: 2rem;
        }
        .tab-btn {
            padding: 1rem 2rem;
            background: none;
            border: none;
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-secondary);
            cursor: pointer;
            transition: var(--transition);
            position: relative;
        }
        .tab-btn.active {
            color: var(--ucl-blue);
        }
        .tab-btn.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 3px;
            background-color: var(--ucl-blue);
        }
        .tab-content {
            display: none;
        }
        .tab-content.active {
            display: block;
        }
        .form-group {
            margin-bottom: 1.8rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: var(--text-primary);
        }
        input, textarea, select {
            width: 100%;
            padding: 1rem;
            border: 2px solid var(--border-color);
            border-radius: 8px;
            font-size: 1rem;
            transition: var(--transition);
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: var(--ucl-blue);
            box-shadow: 0 0 0 3px rgba(0, 82, 159, 0.2);
        }
        .rating-stars {
            display: flex;
            gap: 10px;
            font-size: 2rem;
            color: #ddd;
            margin: 1rem 0;
        }
        .rating-stars .star {
            cursor: pointer;
            transition: var(--transition);
        }
        .rating-stars .star:hover,
        .rating-stars .star.active {
            color: var(--accent-gold);
        }
        .submit-btn {
            background: linear-gradient(to right, var(--ucl-blue), #0066cc);
            color: white;
            border: none;
            padding: 1rem 2.5rem;
            font-size: 1.1rem;
            font-weight: bold;
            border-radius: 50px;
            cursor: pointer;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .submit-btn:hover {
            background: linear-gradient(to right, #0066cc, var(--accent-gold));
            transform: translateY(-3px);
            box-shadow: 0 7px 14px rgba(0, 82, 159, 0.3);
        }
        .site-footer {
            background: var(--ucl-black);
            color: var(--ucl-white);
            padding: 3rem 2rem 1.5rem;
            margin-top: 4rem;
        }
        .footer-content {
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 3rem;
            margin-bottom: 3rem;
        }
        .footer-logo {
            font-family: 'Impact', sans-serif;
            font-size: 2.2rem;
            margin-bottom: 1rem;
            color: var(--ucl-white);
        }
        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            margin: 1.5rem 0;
        }
        .friend-link {
            background: rgba(255, 255, 255, 0.08);
            padding: 0.8rem 1.5rem;
            border-radius: 6px;
            transition: var(--transition);
        }
        .friend-link a {
            color: var(--ucl-silver);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .friend-link:hover {
            background: rgba(255, 255, 255, 0.15);
            transform: translateY(-3px);
        }
        .friend-link:hover a {
            color: var(--accent-gold);
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: var(--ucl-silver);
            font-size: 0.9rem;
        }
        @media (max-width: 1024px) {
            .main-content {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            h1 {
                font-size: 2.8rem;
            }
            h2 {
                font-size: 2rem;
            }
        }
        @media (max-width: 768px) {
            .header-container {
                flex-wrap: wrap;
            }
            .hamburger {
                display: block;
            }
            .main-nav {
                width: 100%;
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.5s ease;
            }
            .main-nav.active {
                max-height: 500px;
                margin-top: 1rem;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 0;
            }
            .main-nav li {
                width: 100%;
            }
            .main-nav a {
                padding: 1rem;
                border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            }
            .article-container, .interaction-section {
                padding: 2rem;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            .intro-text {
                font-size: 1.1rem;
            }
            .footer-content {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
        }
        @media print {
            .site-header, .search-container, .sidebar, .interaction-section, .site-footer {
                display: none;
            }
            body {
                background: white;
                color: black;
                font-size: 12pt;
            }
            .main-content {
                grid-template-columns: 1fr;
                margin: 0;
                padding: 0;
            }
            a {
                color: black;
                text-decoration: underline;
            }
            h1, h2, h3, h4 {
                color: black;
            }
        }