* {
    padding: 0;
    margin: 0;
}

ul,
ol {
    list-style: none;
}

a {
    text-decoration: none;
}
body{
	background-image: url("../img/page_bg.png");
	background-size: cover; /* 或 contain */  
 /* 防止图片重复 */  
    background-position: center;
}
.header {
    width: 100%;
    min-width: 1300px;
    height: 105px;
    background: radial-gradient(circle, aliceblue, lightskyblue); 
    color: black;
}

.header .all {
    width: 1600px;
    height: 105px;
    margin: 0 auto;
}

.header .all .left {
    float: left;
    margin-left: 130px;
	width: 500px;
}

.header .all .left img {
    padding: 15px 20px;
    height: 75px;
    float: left;
}

.header .all .right {
    float: right;
}

.header .all .right ul {
    margin-right: 50px;
}

.header .all .right ul li {
    height: 105px;
    box-sizing: border-box;
    float: left;
    text-align: center;
    padding: 0 30px;
    font-size: 18px;
    line-height: 105px;
}

.header .all .right ul li a {
    color: black;
}

.header .all .right ul li:hover {
    border-bottom: 4px solid rgb(28, 152, 190);
}