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              <div class="clock-bg">
  <span id="wu"></span>
  <div class="clock">
      <div class="hours-con"> 
        <div class="hours"></div>
      </div>
       <div class="minutes-con">
        <div class="minutes"></div>
      </div>
      <div class="seconds-con">
        <div class="seconds"></div>
      </div>
  </div>
  <span class="address">上海</span>
</div>
            
          
!
            
              body {
  font: 12px/1.2 "Microsfot YaHei";
  color: #333;
  background: #151513;
  width: 100vw;
  height: 100vh;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.clock-bg {
  width: 150px;
  height: 150px;
  border-radius: 10px;
  background-image: linear-gradient(
    to bottom,
    #484848 0%,
    #393939 25%,
    #494949 50%,
    #494949 50%,
    #040404 50%,
    #0d0d0d 75%,
    #11110f 100%
  );
  border: 2px solid #010101;
  display: flex;
  display:-webkit-flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}
.clock {
  width: 100px;
  height: 100px;
  background: #fff
    url(https://cssanimation.rocks/images/posts/clocks/ios_clock.svg)
    no-repeat
    center
    center;
  margin: 6px 0;
  position: relative;
  border-radius: 50%;
  background-size: 80%;
  box-shadow: 0 0 2px rgba(67, 67, 67, 0.3);
}
.address {
  color: #fff;
  text-shadow: 0 0 1px rgba(0, 0, 0, 0.2);
}
#wu {
  color: #101010;
  text-shadow: 0 0 1px rgba(255, 255, 255, 0.2);
}

.clock::after {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: 10;
  transform: translate(-50%, -50%);
  -webkit-transform: translate(-50%, -50%);
  -moz-transform: translate(-50%, -50%);
  -o-transform: translate(-50%, -50%);
  -ms-transform: translate(-50%, -50%);
  background: #e43c39;
  border: 2px solid #fff;
  box-shadow: 0 0 0 1px #454449;
  content: "";
  display: block;
}
.hours-con, .minutes-con, .seconds-con {
  position: absolute;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
}
/*时针*/
.hours {
  position: absolute;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-bottom: 30px solid #000;
  top: 22%;
  left: 50%;
  margin-left: -4px;
  transform-origin: 50% 100%;
  -webkit-transform-origin: 50% 100%;
  -moz-transform-origin: 50% 100%;
  -ms-transform-origin: 50% 100%;
  -o-transform-origin: 50% 100%;
}
/*分针*/
.minutes {
  position: absolute;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-bottom: 40px solid #000;
  top: 10%;
  left: 50%;
  margin-left: -4px;
  transform-origin: 50% 100%;
  -webkit-transform-origin: 50% 100%;
  -moz-transform-origin: 50% 100%;
  -ms-transform-origin: 50% 100%;
  -o-transform-origin: 50% 100%;
}
.seconds-con {
  z-index: 12;
}
.seconds {
  position: absolute;
  width: 2px;
  height: 48%;
  top: 2%;
  left: 50%;
  background: #e43c39;
  transform-origin: 50% 100%;
  -webkit-transform-origin: 50% 100%;
  -moz-transform-origin: 50% 100%;
  -ms-transform-origin: 50% 100%;
  -o-transform-origin: 50% 100%;
}

.hours-con {
  animation: rotate 43200s infinite linear;
  -webkit-animation: rotate 43200s infinite linear;
  -moz--animation: rotate 43200s infinite linear;
  -ms-animation: rotate 43200s infinite linear;
  -o-animation: rotate 43200s infinite linear;
}
/* .minutes-con{
  animation: rotate 3600s infinite steps(60);
}
.seconds-con{
    animation: rotate 60s infinite steps(60);
} */ /*完全用css实现时钟转动,但是会有分针和秒针的误差*/
.minutes-con {
  transition: transform 0.3s cubic-bezier(.4, 2.08, .55, .44);
  -webkit-transition: transform 0.3s cubic-bezier(.4, 2.08, .55, .44);
  -moz-transition: transform 0.3s cubic-bezier(.4, 2.08, .55, .44);
  -o-transition: transform 0.3s cubic-bezier(.4, 2.08, .55, .44);
  -ms-transition: transform 0.3s cubic-bezier(.4, 2.08, .55, .44);
}
.seconds-con {
  transition: transform 0.2s cubic-bezier(.4, 2.08, .55, .44);
  -webkit-transition: transform 0.2s cubic-bezier(.4, 2.08, .55, .44);
  -moz-transition: transform 0.2s cubic-bezier(.4, 2.08, .55, .44);
  -ms-transition: transform 0.2s cubic-bezier(.4, 2.08, .55, .44);
  -o-transition: transform 0.2s cubic-bezier(.4, 2.08, .55, .44);
}

@keyframes rotate {
  to {
    transform: rotate(360deg);
    -webkit-transform: rotate(360deg);
    -moz-transform: rotate(360deg);
    -ms-transform: rotate(360deg);
    -o-transform: rotate(360deg);
  }
}

            
          
!
            
              window.onload=function(){
	init();
	function init(){
		initLocalClocks();
		setUpMinuteHands();
		moveSecondHands();
	}


	//初始化表盘刻度
	function initLocalClocks() {
		var date=new Date; 
		var hour=date.getHours();
		var min=date.getMinutes();
		var sec=date.getSeconds();
    
    var wu=document.getElementById("wu");
    if(hour>=12){
        wu.innerText="下午";
    }else{
        wu.innerText="上午";
    }

		//为了能测试秒针每跳到12刻度时分针的转动
		// var hour=1;
		// var min=4;
		// var sec=3; 

		// var hourHand=document.querySelector(".hours");
		// var minHand=document.querySelector(".minutes");
		// var secHand=document.querySelector(".seconds");
 
	 	
	 	// hourHand.style.transform='rotate(+'+hour*30+min/2+'deg)';
	 	// minHand.style.transform='rotate(+'+min*6+'deg)';
	 	// secHand.style.transform='rotate(+'+sec*6+'deg)';


	 	var hands=[
	 	{
	 		hand:'hours',
	 		angle:hour*30+min/2
	 	},
	 	{
	 		hand:'minutes',
	 		angle:min*6
	 	},
	 	{
	 		hand:'seconds',
	 		angle:sec*6
	 	}
	 	]

	 	

	 	for(var i=0;i<hands.length;i++){ 
	 		var elements=document.querySelectorAll("."+hands[i].hand);  

	 		for(var j=0;j<elements.length;j++){
	 			elements[j].style.transform='rotate(+'+hands[i].angle+'deg)';
	 			elements[j].style.WebkitTransform='rotate('+hands[i].angle+'deg)'; 


	 			//获取秒针初始时候的位置,以便下面操作秒针到达12刻度时候,分针才转动
	 			if (hands[i].hand === 'minutes') {
					elements[j].parentNode.setAttribute('data-second-angle', hands[i + 1].angle); 
				}    
	 		}
	 	} 
 
	}
	

	//设置秒针和分针转动,无需设置时针的转动,css已解决
	
	function moveSecondHands(){
		var secCons=document.querySelectorAll(".seconds-con"); 
		setInterval(function(){
			for(var i=0;i<secCons.length;i++){
				if(secCons[i].angle===undefined){
					secCons[i].angle=6;
				}else{
					secCons[i].angle+=6;
				}
				secCons[i].style.transform="rotate("+secCons[i].angle+"deg)";
				secCons[i].style.webkitTransform="rotate("+secCons[i].angle+"deg)";
			} 
		},1000)
	}

	function moveMinuteHands(containers){  
		//先把分针转到延迟后的正时刻
		for(var i=0;i<containers.length;i++){
			containers[i].style.webkitTransform = 'rotateZ(6deg)';
    		containers[i].style.transform = 'rotateZ(6deg)';
		}
		//分针进行正常的转动
		setInterval(function(){
			for(var i=0;i<containers.length;i++){
				if(containers[i].angle===undefined){
					containers[i].angle=12;  //注意是在上一个刻度之前,即从4转到6
				}else{
					containers[i].angle+=6;
				}
				containers[i].style.transform="rotate("+containers[i].angle+"deg)";
				containers[i].style.webkitTransform="rotate("+containers[i].angle+"deg)";
			} 
		},60000)
	}


	function setUpMinuteHands(){
		var minCons=document.querySelectorAll(".minutes-con"); 
		var angle=minCons[0].getAttribute('data-second-angle');
		var delay=(360-angle)/6*1000;
		if(angle>0){
			setTimeout(function(){
				 moveMinuteHands(minCons);
			},delay)
		}  
	}

}
            
          
!
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