@media screen and (min-width:1400px) {
  .whycp_t{ margin-top: 30px; } 
  .whycp_i{ margin-top: 30px;}
}
.reading_csa{
  display: block;
  margin: 10px auto;
  min-height: 40px;
  line-height: 40px;
  background: #5b94d9;
  border:1px solid #5b94d9;
  text-align: center;
  border-radius: 5px;
  color: #ffffff;
  width: 80%;
  font-size: 16px;
}

.reading_csa:hover{
  color: #5b94d9;
  background: #ffffff;
}