@media (max-width: 767px) {  
  .font_size1{ font-size: 17px !important;}
  .font_size2{ font-size: 14px !important;}
  .product{height: auto !important;}
  .product .product-img{padding:0px;margin-bottom:0px}
}
@media (min-width: 767px) {  
  .font_size1{ visibility:visible !important;display: initial!important;}
}

body{
  font-family: SourceHanSansCN;
}