相关疑难解决方法(0)

button {
  background: none;
  border: 0;
  box-sizing: border-box;
  margin: 1em;
  padding: 1em 2em;
  box-shadow: inset 0 0 0 2px #f45e61;
  color: #f45e61;
  font-size: inherit;
  font-weight: 700;
  position: relative;
  vertical-align: middle;
}
button::before, button::after {
  box-sizing: inherit;
  content: " ";
  position: absolute;
  width: 100%;
  height: 100%;
}
.draw {
  transition: color 0.25s;
}
.draw::before, .draw::after {
  border: 2px solid transparent;
  width: 0;
  height: 0;
  transition: width 1.25s ease-out 1.25s, height 1.25s ease-out 1.25s;

}
.draw::before {
  top: 0;
  left: 0;
} …