Sharepoint SearchBox

#SRSB select.ms-sbscopes
{
    height: 24px;
    line-height: 24px;
    width: 78px !important;
}
        
#SRSB input.ms-sbplain
{
    height: 20px;
    width: 100px !important;
}
#SRSB .ms-sbgo.ms-sbcell > a
{
    background-image: url("/_layouts/CIMC.EIP.NGPortal.UI/images/searchbtn.png") !important;
    background-repeat: no-repeat !important;
    display: block;
    height: 24px;
    width: 68px;
}
#SRSB .ms-sbgo.ms-sbcell > a > img
{
    display: none;
}

 这段css能够足够的的解决在主页的搜索框，可以定制自己的搜索框，希望对你们有帮助，效果如下：

修改以前

修改以后