.select {
  border-bottom: 2px solid; /* 下边框 */
  border-image: linear-gradient(
      90deg,
      rgba(250, 173, 20, 0) 0%,
      rgba(250, 173, 20, 1) 51.46%,
      rgba(125, 87, 10, 0) 100%
    )
    1; /* 边框渐变 */
  background-image: radial-gradient(circle at 49% 238%, #faad14, transparent 70%); /* 背景渐变 */
  color: rgba(253, 230, 198, 1);
}