*{
    margin: 0;
    padding: 0;
}
.zkrb_header{
    width: 100%;
    height: 420px;
}
.zkrb_header img{
    width: 100%;
    height: 420px;
}
.zkrb_nav{
    width: 1200px;
    height: 50px;
    margin: 0 auto;
    line-height: 50px;
    border-bottom:2px solid #ccc;
    display: flex;
}
.zkrb_nav .zkrb_nav_title{
    color: #999;
    width: 500px;
    justify-content: flex-start;
    display: flex;
}
.zkrb_nav .zkrb_nav_title span:hover{
    color: #0F9932;
}
.zkrb_content{
    width: 1200px;
    margin: 0 auto;
}
.zkrb_content img{
    max-width: 1000px;
}