section {
  max-width: 300px;
  margin: 0 auto;
}
a.btn_03 {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 50px;
  position: relative;
  background: #228bc8;
  border: 1px solid #228bc8;
  border-radius: 30px;
  box-sizing: border-box;
  padding: 0 45px 0 25px;
  color: #fff;
  font-size: 16px;
  letter-spacing: 0.1em;
  line-height: 1.3;
  text-align: left;
  text-decoration: none;
  transition-duration: 0.3s;
}
a.btn_03:before {
  content: '';
  width: 8px;
  height: 8px;
  border: 0;
  border-top: 2px solid #fff;
  border-right: 2px solid #fff;
  transform: rotate(45deg);
  position: absolute;
  top: 50%;
  right: 25px;
  margin-top: -6px;
}
a.btn_03:hover {
  background: #fff;
  color: #228bc8;
}
a.btn_03:hover:before {
  border-top: 2px solid #228bc8;
  border-right: 2px solid #228bc8;
}