.duilian_con button {
  background-color: #ea2;
  background-image: radial-gradient(circle at 50% 50%, #ea5 0%, #d80 70%);
}

.duilian_con button:hover {
  background-image: radial-gradient(circle at 40% 40%, #f85 0%, #d70 50%);
}

.duilian_con button:focus,
.duilian_con button:active {
  background-image: radial-gradient(circle at 50% 50%, #f50 0%, #c30 50%);
}

.footer {
  background-image: linear-gradient(to bottom, #fffaf0 0%, #fffff3 10% 65%, #fffcf3 90%, #fffdf5 100%);
}