//代码样式
.header{
    width: 100%;
    height: 555rpx;
    background:linear-gradient(to top, rgb(255, 255, 255,.8) 10%,transparent),url('https://wx-img-gpdk.oss-cn-beijing.aliyuncs.com/new/WechatIMG2295.png') ;
    background: -o-linear-gradient(to top, rgb(255, 255, 255,.8) 10%,transparent),url('https://wx-img-gpdk.oss-cn-beijing.aliyuncs.com/new/WechatIMG2295.png');
    background: -moz-linear-gradient(to top, rgb(255, 255, 255,.8) 10%,transparent),url('https://wx-img-gpdk.oss-cn-beijing.aliyuncs.com/new/WechatIMG2295.png');
    background: -webkit-linear-gradient(to top, rgb(255, 255, 255,.8) 10%,transparent),url('https://wx-img-gpdk.oss-cn-beijing.aliyuncs.com/new/WechatIMG2295.png');
    background-size: cover;
    background-repeat: no-repeat;
    position: relative;
}
//