.btn btn-danger{
     width: 160px;
    height: 50px;
}
.mainbody {
    background-image: url('../Images/4.jpg');
}
#logo{
    height:100px;
}
.login-box-plain{
    border-radius:15px;   
    height:430px;
    padding:20px;
    padding-left:30px;
    background-color:rgba(255,255,255,0.5);
  
}
.bigintro{
    text-align:center;
    line-height:normal;
}
.form-group{
    margin-top:30px;
}
.form-actions{
    margin-top:20px;
    margin-left:0px;
   border-radius:10px; 
   
   padding:10px;
   padding-left:15px;
}
.form-actions a{
    color: #fff;
    width: 98%;
    height: 40px;
    background-color: #ca1515;
    display: block;
    text-align: center;
    font-family: "微软雅黑";
    font-size:18px;
    line-height:40px;
     border-radius:5px; 

}
.checkbox{
    margin-left:20px
}