CSS 实现钟表

<div className="roundAnim">
    {/* 刻度 */}
    <div className="scale"></div>
    <div className="s"></div>
    <div className="m"></div>
    <div className="h"></div>
    <div className="point"></div>
</div>

@property --angle {
  syntax: '<angle>';
  inherits: false;
  initial-value: 0deg;
}

.roundAnim {
  position: relative;
  width: 200px;
  height: 200px;
  border: 4px solid #000;
  border-radius: 50%;
}
.roundAnim .s,
.roundAnim .m,
.roundAnim .h,
.roundAnim .point {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}
.roundAnim .s {
  transform: rotate(var(--angle));
  animation: propertyRotate 60s infinite steps(60);
}
.roundAnim .m {
  transform: rotate(var(--angle));
  animation: propertyRotate 3600s infinite steps(360);
}
.roundAnim .h {
  transform: rotate(var(--angle));
  animation: propertyRotate 86400s infinite steps(86400);
}
.roundAnim .point::before {
  content: ' ';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 10px;
  height: 10px;
  background-color: #000;
  border-radius: 50%;
}
.roundAnim .s::before {
  content: ' ';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 2px;
  height: 160px;
  background: linear-gradient(
    180deg,
    #000 0%,
    #000 50%,
    transparent 50%,
    transparent 100%
  );
  border-radius: 2px;
}
.roundAnim .m::before {
  content: ' ';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 3px;
  height: 120px;
  background: linear-gradient(
    180deg,
    #000 0%,
    #000 50%,
    transparent 50%,
    transparent 100%
  );
  border-radius: 2px;
}
.roundAnim .h::before {
  content: ' ';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 5px;
  height: 100px;
  background: linear-gradient(
    180deg,
    #000 0%,
    #000 50%,
    transparent 50%,
    transparent 100%
  );
  border-radius: 2px;
}

.scale {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100%;
  height: 100%;
  background: repeating-conic-gradient(
      from -0.5deg,
      #333 0 1deg,
      transparent 0deg 30deg
    ),
    repeating-conic-gradient(from -0.5deg, #ccc 0 1deg, transparent 0deg 6deg);
  border-radius: 50%;
  -webkit-mask: radial-gradient(transparent 88px, red 0);
}

@keyframes propertyRotate {
  100% {
    --angle: 360deg;
  }
}