@charset "utf-8";
        /* 全局样式 */
        :root {
            --primary: #005BAA;
            --secondary: #FF6B00;
            --light: #F5F7FA;
            --dark: #222222;
            --gray: #888888;
        }
/* 基础重置与全局样式 */
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: "Microsoft YaHei", sans-serif; line-height: 1.6; color: #333; }
.container { width: 90%; max-width: 1200px; margin: 0 auto; }

/* 页眉与导航 */
header { background: #fff; box-shadow: 0 2px 5px rgba(0,0,0,0.1); padding: 1rem 0; position: sticky; top: 0; z-index: 100; }
.header-container { display: flex; justify-content: space-between; align-items: center; }
.logo { font-size: 1.8rem; font-weight: bold; color: #e8491d; } /* 公司Logo位置 */

        nav ul {
            display: flex;
            list-style: none;
        }
        
        nav ul li {
            margin-left: 30px;
            position: relative;
        }
        
        nav ul li a {
            color: var(--dark);
            text-decoration: none;
            font-weight: 500;
            font-size: 16px;
            transition: color 0.3s;
            padding: 5px 0;
        }
        
        nav ul li a::after{
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background-color: var(--secondary);
            transition: width 0.3s;
        }
        
        nav ul li a:hover::after {
            width: 100%;
        }
        
        nav ul li a.active {
            color: var(--primary);
        }
        
        nav ul li a.active::after {
            width: 100%;
        }

        /* 页脚 */
        footer {
            background-color: var(--dark);
            color: white;
            padding: 60px 0;
            margin-top: 60px;
        }
        
        .footer-content {
            display: flex;
            justify-content: space-between;
        }
        
        .footer-section {
            flex: 1;
            margin-right: 40px;
        }
        
        .footer-section h3 {
            color: var(--secondary);
            margin-bottom: 20px;
        }
        
        .footer-section p {
            margin-bottom: 15px;
            color: #aaa;
        }
        
        .footer-section a {
            color: #aaa;
            text-decoration: none;
            transition: color 0.3s;
            display: block;
            margin-bottom: 10px;
        }
        
        .footer-section a:hover {
            color: var(--secondary);
        }
        
        .copyright {
            text-align: center;
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid #444;
            color: #888;
        }
        
		/*新增的   手机menu*/
		/* 移动菜单按钮样式 */
		.mobile-menu-btn {
			display: none;
			cursor: pointer;
			width: 30px;
			height: 20px;
			flex-direction: column;
			justify-content: space-between;
		}
		
		.mobile-menu-btn span {
			display: block;
			width: 100%;
			height: 3px;
			background-color: var(--dark);
			transition: all 0.3s ease;
		}
		
		/* 移动导航菜单 */
		.mobile-nav {
			display: none;
			position: fixed;
			top: 80px;
			left: 0;
			width: 100%;
			background-color: #fff;
			box-shadow: 0 5px 10px rgba(0,0,0,0.1);
			z-index: 99;
		}
		
		.mobile-nav ul {
			flex-direction: column;
			padding: 20px 0;
		}
		
		.mobile-nav ul li {
			margin: 0;
			text-align: center;
		}
		
		.mobile-nav ul li a {
			display: block;
			padding: 15px 0;
			border-bottom: 1px solid #eee;
		}
				
		
		
        /* 响应式设计 */
        @media (max-width: 768px) {
            .header-content {
                flex-direction: column;
                text-align: center;
            }
            
            nav ul {
                margin-top: 20px;
                justify-content: center;
            }
            
            nav ul li {
                margin: 0 15px;
            }
            
            .about-content {
                flex-direction: column;
            }
            
            .contact-content {
                flex-direction: column;
            }
			/*手机menu新增的*/
			.desktop-nav {
				display: none;
			}
			
			.mobile-menu-btn {
				display: flex;
			}
			
			.mobile-nav.active {
				display: block;
			}
			
			/* 汉堡菜单动画 */
			.mobile-menu-btn.active span:nth-child(1) {
				transform: translateY(8px) rotate(45deg);
			}
			
			.mobile-menu-btn.active span:nth-child(2) {
				opacity: 0;
			}
			
			.mobile-menu-btn.active span:nth-child(3) {
				transform: translateY(-8px) rotate(-45deg);
			}
			
			
			
        }