基础按钮样式

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 40px; padding: 0 16px; border: 0; border-radius: 10px;
  background: #0e7490; color: #fff; cursor: pointer;
}
.btn:hover { background: #0891b2; }
.btn:focus-visible { outline: 2px solid #22d3ee; outline-offset: 2px; }