style.css

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: #18191f;
}
.ulClass {
  position: relative;
  display: flex;
}
.ulClass li {
  list-style: none;
}
.ulClass li label {
  position: relative;
}

.ulClass li label input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  cursor: pointer;
}

.ulClass li label .icon {
  position: relative;
  width: 60px;
  height: 60px;
  background: #18191f;
  color: #555555;
  font-size: 24px;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  margin: 0 10px;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: -1px -1px 4px rgba(255, 255, 255, 0.05),
    4px 4px 6px rgba(0, 0, 0, 0.2),
    inset -1px -1px 4px rgba(255, 255, 255, 0.05),
    inset 1px 1px 1px rgba(0, 0, 0, 0.1);
}

.ulClass li label .icon:before {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: calc(100% - 5px);
  height: calc(50% - 2px);
  border-top-left-radius: 8px;
  border-top-right-radius: 8px;
  background: rgba(255, 255, 255, 0.05);
}
/* input[type="checkbox"]:checked :前后不要有空格！否则没效果 */
.ulClass li label input[type="checkbox"]:checked ~ .icon {
  box-shadow: inset 0px 0px 4px rgba(255, 255, 255, 0.05),
    inset 4px 4px 6px rgba(0, 0, 0, 0.2);
}
/* .fa 导入的图标库的样式 */
/* 当点击时图标发光 */
.ulClass li label input[type="checkbox"]:checked ~ .icon .fa {
  color: #00f3ff;
  text-shadow: 0 0 15px #00f3ff, 0 0 25px #00f3ff;
  animation: shine 3s linear infinite;
}
@keyframes shine {
  0% {
    filter: hue-rotate(0deg);
  }
  100% {
    filter: hue-rotate(360deg);
  }
}