#problem .lazy {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  margin-top: 60px;
  text-align: center;
}
#problem .lazy .item {
  padding: 25px 14px;
  border-radius: 20px;
  background-color: #ffffff;
  box-shadow: 0px 0px 15px 0px rgba(35, 24, 21, 0.42);
  margin-bottom: 1rem;
}
#problem .lazy .item h4 {
  padding: 25px 0;
  font-size: 26px;
  font-weight: 700;
  color: #1f1f1f;
}
#problem .lazy .item p {
  color: #3f3f3f;
  font-size: 16px;
  margin-bottom: 14px;
}
#problem .lazy .item a {
  display: block;
  border-radius: 10px;
  background-image: -webkit-linear-gradient(90deg, #ff1913 0%, #ff5d5d 100%);
  box-shadow: 0px 2px 4px 0px rgba(110, 31, 28, 0.5);
  color: white;
  width: 219px;
  height: 44px;
  line-height: 44px;
  font-size: 20px;
}
@media screen and (max-width: 1200px) {
  #problem .lazy {
    justify-content: center;
    margin-top: 1rem;
  }
  #problem .lazy .item a {
    margin: 0 auto;
  }
}