* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Microsoft YaHei', 'Segoe UI', Tahoma, sans-serif;
        }
        
        body {
            background-color: #f5f7fa;
            color: #333;
            line-height: 1.6;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
		
		a {
		color: #ffffff;
		text-decoration: none;
		}
		a:focus,a:hover {
			color: #ffffff;
			text-decoration: none;
			/* text-decoration: underline */
		}
		
		.pt-10 {
			padding-top:10px;
		}
		
		.pt-20 {
			padding-top:20px;
		}
        
		.pt-30 {
			padding-top:30px;
		}
		
        /* 头部样式 */
        header {
            background: linear-gradient(135deg, #1a4b8c 0%, #2b6cb0 100%);
            color: white;
            padding: 20px 0;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .logo h1 {
            font-size: 2.2rem;
            font-weight: 700;
            letter-spacing: 1px;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
        }
        
        .logo p {
            font-size: 1rem;
            opacity: 0.9;
            margin-top: 5px;
        }
        
        nav ul {
            display: flex;
            list-style: none;
        }
        
        nav ul li {
            margin-left: 30px;
        }
        
        nav ul li a {
            color: white;
            text-decoration: none;
            font-weight: 500;
            font-size: 1.1rem;
            transition: all 0.3s ease;
            padding: 8px 12px;
            border-radius: 4px;
        }
        
        nav ul li a:hover {
            background-color: rgba(255, 255, 255, 0.1);
        }
        
        /* 主要内容样式 */
        .main-content {
            padding: 40px 0;
            text-align: center;
        }
        
        .overview {
            margin-bottom: 40px;
        }
        
        .overview h2 {
            font-size: 2rem;
            color: #1a4b8c;
            margin-bottom: 20px;
            position: relative;
            display: inline-block;
            padding-bottom: 10px;
        }
        
        .overview h2:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 3px;
            background: linear-gradient(90deg, #1a4b8c, #2b6cb0);
        }
        
        .overview-img {
            width: 100%;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
            transition: transform 0.3s ease;
            margin: 30px 0;
            height: 500px;
            background: linear-gradient(120deg, #1a4b8c 0%, #2b6cb0 50%, #38a169 100%);
            display: flex;
            justify-content: center;
            align-items: center;
            color: white;
            font-size: 2.5rem;
            font-weight: bold;
            text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.3);
            background-image: url('/images/dlhaidc.jpg');
            background-size: cover;
            background-position: center;
        }
        
        .overview-img:hover {
            transform: translateY(-5px);
        }
        
        .overview-img .img-placeholder {
            background: rgba(0, 0, 0, 0.6);
            padding: 20px 40px;
            border-radius: 10px;
        }
        
        .intro {
            max-width: 1200px;
            margin: 0 auto;
            font-size: 1.1rem;
            color: #444;
            line-height: 1.8;
            text-align: left;
        }
        
        /* 特性展示 */
        .features {
            display: flex;
            justify-content: space-between;
            margin: 60px 0;
            flex-wrap: wrap;
        }
        
        .feature {
            flex: 0 0 calc(33.333% - 30px);
            background: white;
            padding: 30px;
            border-radius: 12px;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
            margin-bottom: 30px;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        
        .feature:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        
        .feature i {
            font-size: 3rem;
            color: #2b6cb0;
            margin-bottom: 20px;
        }
        
        .feature h3 {
            font-size: 1.5rem;
            margin-bottom: 15px;
            color: #1a4b8c;
        }
        
        /* 底部样式 */
        footer {
            background: linear-gradient(135deg, #1a4b8c 0%, #2b6cb0 100%);
            color: white;
            padding: 40px 0 20px;
            margin-top: 40px;
        }
        
        .footer-content {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            margin-bottom: 30px;
        }
        
        .footer-section {
            flex: 0 0 calc(25% - 30px);
            margin-bottom: 20px;
        }
        
        .footer-section h3 {
            font-size: 1.3rem;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 10px;
        }
        
        .footer-section h3:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 40px;
            height: 2px;
            background-color: rgba(255, 255, 255, 0.5);
        }
        
        .footer-section a {
            color: #a3bffa;
            text-decoration: none;
            transition: color 0.3s;
        }
        
        .footer-section a:hover {
            color: white;
        }
        
        .social-icons {
            margin-top: 15px;
        }
        
        .social-icons i {
            font-size: 1.5rem;
            margin-right: 15px;
            cursor: pointer;
            transition: transform 0.3s;
        }
        
        .social-icons i:hover {
            transform: scale(1.2);
        }
        
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.9rem;
            opacity: 0.8;
        }
        
        /* 二维码弹窗 */
        .qrcode-modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.7);
            z-index: 2000;
            justify-content: center;
            align-items: center;
        }
        
        .qrcode-content {
            background: white;
            padding: 30px;
            border-radius: 12px;
            text-align: center;
            box-shadow: 0 5px 30px rgba(0, 0, 0, 0.3);
            position: relative;
            animation: modalFadeIn 0.3s;
        }
        
        .qrcode-content img {
            width: 200px;
            height: 200px;
            margin-bottom: 15px;
            border: 1px solid #eee;
        }
        
        .qrcode-content p {
            color: #333;
            font-weight: 500;
        }
        
        .close-btn {
            position: absolute;
            top: 10px;
            right: 15px;
            font-size: 1.5rem;
            cursor: pointer;
            color: #999;
            transition: color 0.3s;
        }
        
        .close-btn:hover {
            color: #333;
        }
        
        @keyframes modalFadeIn {
            from {
                opacity: 0;
                transform: translateY(-50px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        /* 响应式设计 - 特别优化移动端间距 */
        @media (max-width: 1200px) {
            .container {
                padding: 0 30px;
            }
        }
        
        @media (max-width: 992px) {
            .feature {
                flex: 0 0 calc(50% - 20px);
            }
            
            .footer-section {
                flex: 0 0 calc(50% - 20px);
            }
            
            .overview-img {
                height: 400px;
            }
        }
        
        @media (max-width: 768px) {
            .container {
                padding: 0 25px;
            }
            
            .header-content {
                flex-direction: column;
                text-align: center;
            }
            
            nav ul {
                margin-top: 20px;
                justify-content: center;
                flex-wrap: wrap;
            }
            
            nav ul li {
                margin: 5px 10px;
            }
            
            .feature {
                flex: 0 0 100%;
                margin: 0 0 25px 0;
                padding: 20px;
            }
            
            .footer-section {
                flex: 0 0 100%;
                text-align: center;
                margin-bottom: 30px;
                padding: 5px 15px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.1);
                padding-bottom: 20px;
                margin-bottom: 20px;
                display: flex;
                flex-direction: column;
                align-items: center;
                justify-content: center;
            }
            
            .footer-section:last-child {
                border-bottom: none;
                padding-bottom: 0;
                margin-bottom: 0;
            }
            
            .footer-section h3:after {
                left: 50%;
                transform: translateX(-50%);
            }
            
            .overview-img {
                height: 300px;
                font-size: 1.5rem;
                margin: 20px 0;
            }
            
            .overview h2 {
                font-size: 1.8rem;
                padding: 0 15px 10px;
            }
            
            .intro {
                padding: 0 15px;
                font-size: 1rem;
            }
            
            .features {
                margin: 40px 0;
            }
        }
        
        @media (max-width: 480px) {
            .container {
                padding: 0 20px;
            }
            
            .logo h1 {
                font-size: 1.8rem;
            }
            
            nav ul li a {
                font-size: 1rem;
                padding: 6px 8px;
            }
            
            .overview-img {
                height: 250px;
                font-size: 1.2rem;
                margin: 15px 0;
            }
            
            .overview h2 {
                font-size: 1.6rem;
            }
            
            .intro {
                padding: 0 10px;
                font-size: 0.95rem;
            }
            
            .feature {
                padding: 15px;
                margin: 0 0 20px 0;
            }
            
            .feature i {
                font-size: 2.5rem;
            }
            
            .feature h3 {
                font-size: 1.3rem;
            }
            
            .footer-content {
                margin-bottom: 20px;
            }
            
            .footer-section {
                padding: 5px 10px;
            }
        }