nav {
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #fff;
	font-size:14px;
    padding: 10px 0;
}

.logo {
    display: flex;
    align-items: center;
    margin-right: 150px;
}

.logo img {
    width: 180px;
    height: auto;
    margin-right: 10px;
}

.main-nav {
    list-style: none;
    display: flex;
    margin: 0;
    padding: 0;
}

.main-nav li {
    position: relative;
    margin: 0 40px;
	font-weight:bold;
}

.main-nav a {
    text-decoration: none;
	font:20px/30px; 
    color: #333;
    padding: 10px 0;
    display: block;
}

.main-nav a:hover {
    color: blue;
}

.has-dropdown:hover > .dropdown {
    display: block;
}


.dropdown {
    display: none;
    position: absolute;
    top: 100%;
    left: -100%;
    background-color: #FFFFFF;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
    min-width: 220px;
	font-size:14px;
    z-index: 1;
	list-style-type: none;
	padding-left: 0;
}


.dropdown li {
	height: auto;
    margin: 0;
	background-color: #f6f6f6;
}

.dropdown a {
	width: 100%;
    color: #333;
    text-align: center;
    display: block;
}

.dropdown a:hover {
    background-color:#20337f;
    color: #fff;
}





        footer {
            background-color: #012060;
            color: #fff;
            padding:10px 0; margin:0;
		    text-align: center;
        }

        /* 新增样式，用于包裹包含图标和文字的每一项 */
       .contact-item {
            display: inline-flex;
            align-items: center;
            justify-content: center;
			font-size:14px;
            margin: 0 10px;
		   
        }
		
		.contact-item a{
			text-decoration: none;
		}

        /* 新增样式，用于设置图标大小 */
       .contact-icon {
            width: 20px;
            height: 20px;
            margin-right: 5px;
        }
		
		.contact-second-line{
			margin-top: 10px;
		}

        footer p {
            margin: 5px 0;
        }


/* 手机导航样式 */
@media (max-width : 762px ){
    nav {
        flex-direction: column;
        padding: 10px;
    }
    
    .logo {
        margin-right: 0;
        margin-bottom: 15px;
    }
    
    .main-nav {
        flex-direction: column;
        width: 100%;
        display: none; /* 默认隐藏导航 */
    }
    
    .main-nav li {
        margin: 5px 0;
        text-align: center;
    }
    
    .dropdown {
        position: static;
        box-shadow: none;
        background-color: #f8f9fa;
    }
    
    /* 汉堡菜单 */
    .menu-toggle {
        display: block;
        position: absolute;
        top: 20px;
        right: 20px;
        cursor: pointer;
    }

       /* 一级菜单样式 */
    .main-nav > li > a {
        font-size: 17px !important;
        font-weight: 600;
        color: #20337f !important;
        background-color: #f8f8f8;
        border-radius: 6px;
        margin: 4px 0;
        padding: 14px 20px !important;
    }


}

/* 桌面端样式 */
@media (min-width: 769px) {
    /* 强制显示桌面导航 */
    .main-nav {
        display: flex !important;
    }
    
    /* 强制隐藏汉堡菜单 */
    .menu-toggle {
        display: none !important;
    }
    
    /* 修复下拉菜单定位 */
    .dropdown {
        left: 50% !important;
        transform: translateX(-50%);
    }
}