.protocol_box{
    padding:0 0.35rem;
    width:100%;
    box-sizing: border-box;
}
.protocol_box h4{
    line-height:0.9rem;
    font-size:0.3rem;
    color:#4e4b4c;
}
.protocol_box p{
    font-size:0.24rem;
    line-height:0.4rem;
    color:#4e4b4c;
    margin-bottom:0.15rem;
}
.protocol_box div{
    font-size:0.24rem;
    line-height:0.35rem;
    color:#4e4b4c;
    padding-left:0.2rem;
    margin-bottom:0.15rem;
}