body{
    background: url(https://img2018.cnblogs.com/blog/1715500/201907/1715500-20190730181355691-771252863.gif) no-repeat 100% 0;
}
#container{
    width: 100% !important;
    background: rgb(27 130 148 / 57%);
}
#banner {
    height: 100px;
    background: linear-gradient(45deg, #4e8fe4, transparent);
}
#content{
    padding: 20px;
    border: 1px solid lightseagreen;
    background: linear-gradient(107deg, #ccedf1, transparent);
}
#nav-main{
    background: url(images/back_navmain.gif) transparent no-repeat;
}
#leftsidebar{
    background: linear-gradient(90deg, #89e6ed, #abcfe8);
}
#nav-main a:link, #nav-main a:visited{
    color: #ebebeb;
}