:root {
            --primary: #FF9800;
            --secondary: #2196F3;
            --dark: #2C3E50;
            --light: #F5F7FA;
            --success: #4CAF50;
            --text: #333333;
            --text-light: #666666;
            --border: #E0E0E0;
            --shadow: 0 4px 12px rgba(0,0,0,0.08);
            --radius: 8px;
            --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: 1.7;
            color: var(--text);
            background-color: var(--light);
            overflow-x: hidden;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, var(--dark) 0%, #1a2530 100%);
            color: white;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 15px rgba(0,0,0,0.1);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 20px;
        }
        .my-logo {
            font-family: 'Arial Black', sans-serif;
            font-size: 28px;
            background: linear-gradient(to right, var(--primary), #FFC107);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            text-decoration: none;
            font-weight: 900;
            letter-spacing: 1px;
            transition: var(--transition);
        }
        .my-logo:hover {
            transform: scale(1.05);
        }
        .my-logo span {
            color: var(--secondary);
            -webkit-text-fill-color: var(--secondary);
        }
        .desktop-nav {
            display: flex;
            gap: 30px;
        }
        @media (max-width: 992px) {
            .desktop-nav {
                display: none;
            }
        }
        .desktop-nav a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            font-size: 16px;
            padding: 8px 12px;
            border-radius: var(--radius);
            transition: var(--transition);
        }
        .desktop-nav a:hover {
            background-color: rgba(255,255,255,0.1);
            color: var(--primary);
        }
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 24px;
            cursor: pointer;
            padding: 5px;
        }
        @media (max-width: 992px) {
            .mobile-menu-btn {
                display: block;
            }
        }
        .mobile-nav {
            display: none;
            flex-direction: column;
            background-color: var(--dark);
            padding: 20px;
            border-top: 1px solid rgba(255,255,255,0.1);
        }
        .mobile-nav.active {
            display: flex;
        }
        .mobile-nav a {
            color: white;
            text-decoration: none;
            padding: 12px 15px;
            border-bottom: 1px solid rgba(255,255,255,0.05);
            transition: var(--transition);
        }
        .mobile-nav a:hover {
            background-color: rgba(255,255,255,0.05);
            padding-left: 20px;
        }
        .breadcrumb {
            background-color: rgba(255,255,255,0.05);
            padding: 12px 20px;
            font-size: 14px;
        }
        .breadcrumb a {
            color: #BBBBBB;
            text-decoration: none;
            transition: var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb i {
            margin: 0 8px;
            font-size: 12px;
        }
        .search-section {
            background: linear-gradient(to right, var(--secondary), #1976D2);
            padding: 40px 20px;
            text-align: center;
            margin-bottom: 40px;
        }
        .search-container {
            max-width: 700px;
            margin: 0 auto;
        }
        .search-title {
            color: white;
            margin-bottom: 20px;
            font-size: 28px;
        }
        .search-form {
            display: flex;
            box-shadow: var(--shadow);
            border-radius: 50px;
            overflow: hidden;
        }
        .search-input {
            flex: 1;
            padding: 18px 25px;
            border: none;
            font-size: 16px;
            outline: none;
        }
        .search-btn {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 0 30px;
            cursor: pointer;
            font-size: 18px;
            transition: var(--transition);
        }
        .search-btn:hover {
            background-color: #F57C00;
        }
        main {
            padding: 30px 0;
        }
        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        @media (max-width: 768px) {
            .content-wrapper {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background-color: white;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 40px;
            overflow: hidden;
        }
        .article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 30px;
            padding-bottom: 20px;
            border-bottom: 1px solid var(--border);
            color: var(--text-light);
            font-size: 14px;
        }
        .update-time {
            color: var(--primary);
            font-weight: 600;
        }
        h1 {
            font-size: 42px;
            line-height: 1.3;
            margin-bottom: 25px;
            color: var(--dark);
            position: relative;
            padding-bottom: 15px;
        }
        h1:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 80px;
            height: 4px;
            background: linear-gradient(to right, var(--primary), var(--secondary));
            border-radius: 2px;
        }
        h2 {
            font-size: 32px;
            margin: 40px 0 20px;
            color: var(--dark);
            padding-bottom: 10px;
            border-bottom: 1px solid var(--border);
        }
        h3 {
            font-size: 24px;
            margin: 30px 0 15px;
            color: var(--dark);
        }
        h4 {
            font-size: 20px;
            margin: 25px 0 12px;
            color: var(--dark);
        }
        p {
            margin-bottom: 20px;
            text-align: justify;
        }
        .intro-text {
            font-size: 18px;
            background-color: #F0F7FF;
            padding: 20px;
            border-left: 4px solid var(--secondary);
            border-radius: 0 var(--radius) var(--radius) 0;
            margin-bottom: 30px;
        }
        .highlight {
            background-color: #FFF9E6;
            padding: 3px 6px;
            border-radius: 3px;
            font-weight: 600;
        }
        .key-points {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 20px;
            margin: 30px 0;
        }
        .point-card {
            background: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
            padding: 20px;
            border-radius: var(--radius);
            border-left: 4px solid var(--primary);
            transition: var(--transition);
        }
        .point-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow);
        }
        .point-card i {
            color: var(--primary);
            font-size: 24px;
            margin-bottom: 10px;
        }
        .feature-image {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: var(--radius);
            margin: 30px auto;
            display: block;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .feature-image:hover {
            transform: scale(1.01);
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: var(--text-light);
            margin-top: 10px;
            font-size: 14px;
        }
        .content-link {
            color: var(--secondary);
            text-decoration: none;
            font-weight: 600;
            transition: var(--transition);
            border-bottom: 1px dotted transparent;
        }
        .content-link:hover {
            color: var(--primary);
            border-bottom-color: var(--primary);
        }
        blockquote {
            background: linear-gradient(to right, rgba(33, 150, 243, 0.05), transparent);
            border-left: 4px solid var(--secondary);
            padding: 20px 25px;
            margin: 30px 0;
            font-style: italic;
            border-radius: 0 var(--radius) var(--radius) 0;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            margin: 30px 0;
        }
        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: 1fr;
            }
        }
        .stat-box {
            background: linear-gradient(135deg, var(--secondary), #0D47A1);
            color: white;
            padding: 25px;
            border-radius: var(--radius);
            text-align: center;
            transition: var(--transition);
        }
        .stat-box:hover {
            transform: translateY(-5px);
        }
        .stat-number {
            font-size: 42px;
            font-weight: 900;
            margin-bottom: 10px;
        }
        .stat-label {
            font-size: 16px;
            opacity: 0.9;
        }
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            margin: 30px 0;
            box-shadow: var(--shadow);
            border-radius: var(--radius);
            overflow: hidden;
        }
        .comparison-table th {
            background-color: var(--dark);
            color: white;
            padding: 15px;
            text-align: left;
        }
        .comparison-table td {
            padding: 15px;
            border-bottom: 1px solid var(--border);
        }
        .comparison-table tr:nth-child(even) {
            background-color: #F9F9F9;
        }
        .comparison-table tr:hover {
            background-color: #F0F7FF;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }
        .sidebar-widget {
            background-color: white;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 25px;
        }
        .widget-title {
            font-size: 20px;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--primary);
            color: var(--dark);
        }
        .related-links {
            list-style: none;
        }
        .related-links li {
            margin-bottom: 12px;
            padding-bottom: 12px;
            border-bottom: 1px solid var(--border);
        }
        .related-links a {
            color: var(--text);
            text-decoration: none;
            transition: var(--transition);
            display: flex;
            align-items: center;
        }
        .related-links a:hover {
            color: var(--primary);
            padding-left: 5px;
        }
        .related-links i {
            color: var(--primary);
            margin-right: 10px;
            font-size: 14px;
        }
        .download-box {
            background: linear-gradient(135deg, var(--primary), #FF5722);
            color: white;
            text-align: center;
            padding: 30px;
            border-radius: var(--radius);
        }
        .download-btn {
            display: inline-block;
            background-color: white;
            color: var(--primary);
            padding: 15px 30px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 900;
            margin-top: 20px;
            transition: var(--transition);
            box-shadow: 0 4px 15px rgba(0,0,0,0.2);
        }
        .download-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(0,0,0,0.25);
        }
        .user-interaction {
            margin-top: 50px;
            padding-top: 40px;
            border-top: 2px solid var(--border);
        }
        .rating-section, .comment-section {
            background-color: white;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 30px;
            margin-bottom: 30px;
        }
        .rating-title, .comment-title {
            display: flex;
            align-items: center;
            margin-bottom: 25px;
            color: var(--dark);
        }
        .rating-title i, .comment-title i {
            margin-right: 10px;
            color: var(--primary);
        }
        .star-rating {
            display: flex;
            gap: 5px;
            margin-bottom: 20px;
        }
        .star {
            font-size: 28px;
            color: #DDDDDD;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover, .star.active {
            color: #FFC107;
        }
        .rating-form, .comment-form {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .form-group {
            display: flex;
            flex-direction: column;
        }
        .form-label {
            margin-bottom: 8px;
            font-weight: 600;
        }
        .form-input, .form-textarea {
            padding: 15px;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            font-family: inherit;
            font-size: 16px;
            transition: var(--transition);
        }
        .form-input:focus, .form-textarea:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(255, 152, 0, 0.1);
        }
        .form-textarea {
            min-height: 150px;
            resize: vertical;
        }
        .submit-btn {
            background: linear-gradient(to right, var(--primary), #FF5722);
            color: white;
            border: none;
            padding: 16px 30px;
            border-radius: var(--radius);
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            align-self: flex-start;
        }
        .submit-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 15px rgba(255, 87, 34, 0.3);
        }
        footer {
            background-color: var(--dark);
            color: #BBBBBB;
            padding: 50px 0 20px;
            margin-top: 60px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 40px;
            margin-bottom: 40px;
        }
        @media (max-width: 992px) {
            .footer-content {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 576px) {
            .footer-content {
                grid-template-columns: 1fr;
            }
        }
        .footer-column h3 {
            color: white;
            font-size: 20px;
            margin-bottom: 25px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--primary);
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        .footer-links a {
            color: #BBBBBB;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--primary);
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background-color: rgba(255,255,255,0.05);
            padding: 20px;
            border-radius: var(--radius);
            margin-top: 15px;
        }
        friend-link a {
            color: var(--primary) !important;
            font-weight: 600;
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 14px;
        }
        .copyright a {
            color: var(--primary);
            text-decoration: none;
        }
        .text-center {
            text-align: center;
        }
        .mb-30 {
            margin-bottom: 30px;
        }
        .mt-30 {
            margin-top: 30px;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        .strong {
            font-weight: 900;
            color: var(--dark);
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 32px;
            }
            h2 {
                font-size: 26px;
            }
            h3 {
                font-size: 22px;
            }
            .article-content {
                padding: 25px;
            }
            .search-title {
                font-size: 22px;
            }
            .search-input {
                padding: 15px 20px;
            }
        }