@media screen and (max-width: 640px){
.sig-bnr{
    text-align:center;
}
.sig-bnr img{
    width:100%;
}
}
.work-text-css{
    color:#F2A500;
    font-weight:bold;
    font-size:120%;
}
.top-text-box {
text-align: center;
}
.top-text-center{
text-align: left;
display: inline-block;
}