.logo{
width:45%;}
.jsfz {
  width: 100%;
  height: 200px;

  position: relative;}
.jsfz a {
position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50% ,-50%);
  color: #fff;
  font-size: 48px;
  font-weight: bold;}
@media screen and (max-width: 1024px) {
.jsfz {
  height: 249px;}
.jsfz a {
  font-size: 50px;}
}
@media screen and (max-width: 768px) {
  .jsfz {
    height: 188px;}
.jsfz a {
  font-size: 38px;}
}
@media screen and (max-width: 480px) {
  .jsfz {
    height: 130px;}
.jsfz a {
  font-size: 26px;}
}
/*123*/