:root {
            --primary-color: #2563eb;
            --primary-light: #3b82f6;
            --secondary-color: #06b6d4;
            --text-dark: #1e293b;
            --text-light: #64748b;
            --bg-light: #f8fafc;
            --white: #ffffff;
            --border-color: #e2e8f0;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
            --radius: 8px;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
            color: var(--text-dark);
            background-color: var(--white);
            line-height: 1.6;
            overflow-x: hidden;
        }
        
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        /* 导航栏 */
        header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            transition: background-color 0.3s, box-shadow 0.3s;
        }
        
        header.scrolled {
            background-color: var(--white);
            box-shadow: var(--shadow);
        }
        
        .navbar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        .logo img {
            height: 40px;
        }
        
        .logo-text {
            font-size: 1.5rem;
            font-weight: 700;
            background: linear-gradient(90deg, #2563eb, #06b6d4);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        
        .nav-links {
            display: flex;
            gap: 25px;
        }
        
        .nav-links a {
            text-decoration: none;
            color: var(--white);
            font-weight: 500;
            transition: color 0.3s;
        }
        
        header.scrolled .nav-links a {
            color: var(--text-dark);
        }
        
        .nav-links a:hover {
            color: var(--primary-color);
        }
        
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--white);
        }
        
        header.scrolled .mobile-menu-btn {
            color: var(--text-dark);
        }
        
        /* Banner区域 */
        .banner {
            height: 100vh;
            display: flex;
            align-items: center;
            position: relative;
            background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
            overflow: hidden;
        }
        
        .banner::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 50%;
            height: 100%;
            background: url('ailwbj.jpg') no-repeat center center;
            background-size: cover;
            clip-path: polygon(20% 0, 100% 0, 100% 100%, 0% 100%);
        }
        
        .banner-content {
            flex: 0 0 50%;
            max-width: 50%;
            padding-right: 40px;
            position: relative;
            z-index: 2;
        }
        
        .banner-title {
            font-size: 3rem;
            font-weight: 800;
            margin-bottom: 20px;
            line-height: 1.2;
            background: linear-gradient(90deg, #2563eb, #06b6d4);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        
        .banner-desc {
            font-size: 1.2rem;
            color: var(--text-light);
            margin-bottom: 30px;
            min-height: 60px;
        }
        
        .banner-buttons {
            display: flex;
            gap: 15px;
        }
        
        .btn {
            padding: 12px 24px;
            border-radius: var(--radius);
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
            text-decoration: none;
            display: inline-block;
        }
        
        .btn-primary {
            background-color: var(--primary-color);
            color: var(--white);
            border: none;
        }
        
        .btn-primary:hover {
            background-color: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: 0 10px 20px rgba(37, 99, 235, 0.2);
        }
        
        .btn-secondary {
            background-color: transparent;
            color: var(--primary-color);
            border: 2px solid var(--primary-color);
        }
        
        .btn-secondary:hover {
            background-color: rgba(37, 99, 235, 0.1);
            transform: translateY(-2px);
        }
        
        /* 核心系统 */
        .section {
            padding: 80px 0;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 50px;
        }
        
        .section-title h2 {
            font-size: 2.5rem;
            margin-bottom: 15px;
            color: var(--text-dark);
        }
        
        .section-title p {
            color: var(--text-light);
            max-width: 700px;
            margin: 0 auto;
            font-size: 1.1rem;
        }
        
        .system-tabs {
            display: flex;
            justify-content: center;
            margin-bottom: 40px;
            border-bottom: 1px solid var(--border-color);
        }
        
        .tab-btn {
            padding: 15px 30px;
            background: none;
            border: none;
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-light);
            cursor: pointer;
            position: relative;
            transition: color 0.3s;
        }
        
        .tab-btn.active {
            color: var(--primary-color);
        }
        
        .tab-btn.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 0;
            width: 100%;
            height: 3px;
            background-color: var(--primary-color);
            border-radius: 3px 3px 0 0;
        }
        
        .system-content {
            display: none;
        }
        
        .system-content.active {
            display: block;
        }
        
        .features-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }
        
        .feature-card {
            background: var(--white);
            border-radius: var(--radius);
            padding: 25px;
            box-shadow: var(--shadow);
            transition: transform 0.3s;
            border: 1px solid var(--border-color);
        }
        
        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
        }
        
        .feature-icon {
            font-size: 2rem;
            margin-bottom: 15px;
            color: var(--primary-color);
        }
        
        .feature-title {
            font-size: 1.2rem;
            margin-bottom: 15px;
            color: var(--text-dark);
        }
        
        .feature-desc {
            color: var(--text-light);
        }
        
        /* 分隔页 */
        .divider {
            background: linear-gradient(135deg, #2563eb 0%, #06b6d4 100%);
            padding: 80px 0;
            text-align: center;
            color: var(--white);
        }
        
        .divider h3 {
            font-size: 2.2rem;
            margin-bottom: 15px;
        }
        
        .divider p {
            max-width: 700px;
            margin: 0 auto;
            font-size: 1.1rem;
            opacity: 0.9;
        }
        
        /* 论文模板 */
        .tabs {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 30px;
            justify-content: center;
        }
        
        .tab {
            padding: 8px 16px;
            background: var(--bg-light);
            border: none;
            border-radius: 20px;
            cursor: pointer;
            transition: all 0.3s;
        }
        
        .tab.active {
            background: var(--primary-color);
            color: var(--white);
        }
        
        .templates-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        
        .template-card {
            background: var(--white);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: transform 0.3s;
            border: 1px solid var(--border-color);
        }
        
        .template-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
        }
        
        .template-img {
            height: 180px;
            width: 100%;
            object-fit: cover;
        }
        
        .template-content {
            padding: 20px;
        }
        
        .template-title {
            font-size: 1.1rem;
            margin-bottom: 10px;
            color: var(--text-dark);
        }
        
        .template-desc {
            color: var(--text-light);
            margin-bottom: 15px;
            font-size: 0.9rem;
        }
        
        .template-btn {
            display: block;
            text-align: center;
            background: var(--primary-color);
            color: var(--white);
            padding: 8px 0;
            border-radius: var(--radius);
            text-decoration: none;
            font-weight: 500;
            transition: background 0.3s;
        }
        
        .template-btn:hover {
            background: var(--primary-light);
        }
        
        /* 资讯区域 */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        
        .news-card {
            background: var(--white);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: transform 0.3s;
            border: 1px solid var(--border-color);
        }
        
        .news-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
        }
        
        .news-img {
            height: 180px;
            width: 100%;
            object-fit: cover;
        }
        
        .news-content {
            padding: 20px;
        }
        
        .news-title {
            font-size: 1.1rem;
            margin-bottom: 10px;
            color: var(--text-dark);
        }
        
        .news-desc {
            color: var(--text-light);
            margin-bottom: 15px;
            font-size: 0.9rem;
        }
        
        .news-btn {
            display: inline-block;
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 500;
            transition: color 0.3s;
        }
        
        .news-btn:hover {
            color: var(--primary-light);
        }
        
        /* 底部区域 */
        footer {
            background-color: var(--text-dark);
            color: var(--white);
            padding: 60px 0 20px;
        }
        
        .footer-content {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 40px;
            margin-bottom: 40px;
        }
        
        .footer-column h3 {
            font-size: 1.2rem;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 10px;
        }
        
        .footer-column h3::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 40px;
            height: 2px;
            background-color: var(--primary-color);
        }
        
        .footer-links {
            list-style: none;
        }
        
        .footer-links li {
            margin-bottom: 10px;
        }
        
        .footer-links a {
            color: #cbd5e1;
            text-decoration: none;
            transition: color 0.3s;
        }
        
        .footer-links a:hover {
            color: var(--white);
        }
        
        .kf-img {
            max-width: 150px;
            margin-top: 10px;
            border-radius: var(--radius);
        }
        
        .friend-links {
            text-align: center;
            padding: 20px 0;
            border-top: 1px solid #334155;
            border-bottom: 1px solid #334155;
            margin-bottom: 20px;
        }
        
        .friend-links a {
            color: #cbd5e1;
            text-decoration: none;
            margin: 0 10px;
            transition: color 0.3s;
        }
        
        .friend-links a:hover {
            color: var(--white);
        }
        
        .copyright {
            text-align: center;
            color: #94a3b8;
            font-size: 0.9rem;
        }
        
        /* 响应式设计 */
        @media (max-width: 992px) {
            .features-grid,
            .templates-grid,
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .footer-content {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .banner-title {
                font-size: 2.5rem;
            }
        }
        
        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background-color: var(--white);
                flex-direction: column;
                padding: 20px;
                box-shadow: var(--shadow);
            }
            
            .nav-links.active {
                display: flex;
            }
            
            .nav-links a {
                color: var(--text-dark);
                padding: 10px 0;
            }
            
            .mobile-menu-btn {
                display: block;
            }
            
            .banner {
                flex-direction: column;
                text-align: center;
                height: auto;
                padding: 120px 0 60px;
            }
            
            .banner::before {
                display: none;
            }
            
            .banner-content {
                flex: 1;
                max-width: 100%;
                padding-right: 0;
            }
            
            .banner-buttons {
                justify-content: center;
            }
            
            .features-grid,
            .templates-grid,
            .news-grid {
                grid-template-columns: 1fr;
            }
            
            .footer-content {
                grid-template-columns: 1fr;
            }
            
            .banner-title {
                font-size: 2rem;
            }
        }
        
        /* 打字机效果 */
        .typewriter {
            overflow: hidden;
            white-space: normal;
            animation: typing 3.5s steps(40, end);
        }
        
        @keyframes typing {
            from { opacity: 0; }
            to { opacity: 1; }
        }
		        /* 保留原有样式，只添加修改部分 */
        
        .templates-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        
        .template-card {
            background: var(--white);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: transform 0.3s;
            border: 1px solid var(--border-color);
            display: none; /* 默认隐藏所有卡片 */
        }
        
        .template-card.active {
            display: block; /* 激活的卡片显示 */
        }
        
        .show-more-container {
            text-align: center;
            margin-top: 40px;
            display: none; /* 默认隐藏"显示更多"按钮 */
        }
        
        .show-more-btn {
            background: var(--primary-color);
            color: var(--white);
            border: none;
            padding: 12px 30px;
            border-radius: var(--radius);
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
        }
        
        .show-more-btn:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
        }