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<!DOCTYPE html>
<html>
<head> 
<meta charset="utf-8">
<meta http-equiv="Cache-Control" content="no-siteapp" />
<meta http-equiv="Cache-Control" content="no-transform" />
<meta name="applicable-device" content="pc,mobile">
<meta name="viewport"  content="width=device-width, initial-scale=1" />
<title>桌面时钟_在线极简时钟同步</title>
<meta name="keywords" content="桌面时钟,在线时钟,极简时钟,时钟同步" />
<meta name="description" content="北京时间网提供桌面时钟，在线极简同步时钟。" />
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<style type="text/css">
a:link {
	color: #FFF;
}
a:visited {
	color: #FFF;
}
a:hover {
	color: #F90;
}
a:active {
	color: #FFF;
}
body {
	/* background: #fff; */
}

.clock {
	position: absolute;
	opacity: 1
}

.fill .clock {
	left: 50%;
	top: 50%
}

.centre {
	position: absolute;
	top: 50%;
	left: 50%;
	width: 0;
	height: 0
}

.expand {
	position: absolute;
	top: 0;
	left: 0;
	transform: translate(-50%, -50%)
}

.anchor {
	position: absolute;
	top: 0;
	left: 0;
	width: 0;
	height: 0
}

.element {
	position: absolute;
	top: 0;
	left: 0
}

.round {
	border-radius: 296px
}

.circle-1 {
	/* background: #fff; */
	background: #000;
	width: 12px;
	height: 12px
}

.circle-2 {
	background: #fa9f22;
	width: 8px;
	height: 8px
}

.circle-3 {
	background: #ccc;
	width: 4px;
	height: 4px
}

.second {
	transform: rotate(180deg)
}

.minute {
	transform: rotate(54deg)
}

.second-hand {
	width: 2px;
	height: 164px;
	background: #fa9f22;
	transform: translate(-50%, -100%) translateY(24px)
}

.hour {
	transform: rotate(304.5deg)
}

.thin-hand {
	width: 4px;
	height: 50px;
	background: #000;
	transform: translate(-50%, -100%)
}

.fat-hand {
	width: 10px;
	height: 57px;
	border-radius: 10px;
	background: #000;
	transform: translate(-50%, -100%) translateY(-18px)
}

.minute-hand {
	height: 112px
}

.hour-text {
	position: absolute;
	font: 40px Hei, Helvetica, Arial, sans-serif;
	color: #000;
	transform: translate(-50%, -50%)
}

.hour-10 {
	padding-left: .4ex
}

.hour-11 {
	padding-left: .25ex
}

.minute-text {
	position: absolute;
	font: 12px Avenir Next, Helvetica, Arial, sans-serif;
	color: #000;
	transform: translate(-50%, -50%)
}

.minute-line {
	background: #000;
	width: 1px;
	height: 9px;
	transform: translate(-50%, -100%) translateY(-131px);
	opacity: .34
}
</style>
</head> 
<body> 
<div class="fill">
<div class="reference"></div>
<div class="clock" id="utility-clock">
<div class="centre">
<div class="dynamic"></div>
<div class="expand round circle-1"></div>
<div class="anchor hour">
<div class="element thin-hand"></div>
<div class="element fat-hand"></div>
</div>
<div class="anchor minute">
<div class="element thin-hand"></div>
<div class="element fat-hand minute-hand"></div>
</div>
<div class="anchor second">
<div class="element second-hand"></div>
</div>
<div class="expand round circle-2"></div>
<div class="expand round circle-3"></div>
</div>
</div>
</div>
<script>
var clock = document.querySelector('#utility-clock')
utilityClock(clock)
if (clock.parentNode.classList.contains('fill')) autoResize(clock, 295 + 32)

function utilityClock(container) {
	var dynamic = container.querySelector('.dynamic')
	var hourElement = container.querySelector('.hour')
	var minuteElement = container.querySelector('.minute')
	var secondElement = container.querySelector('.second')
	var minute = function(n) {
		return n % 5 == 0 ? minuteText(n) : minuteLine(n)
	}
	var minuteText = function(n) {
		var element = document.createElement('div')
		element.className = 'minute-text'
		element.innerHTML = (n < 10 ? '0' : '') + n
		position(element, n / 60, 135)
		dynamic.appendChild(element)
	}
	var minuteLine = function(n) {
		var anchor = document.createElement('div')
		anchor.className = 'anchor'
		var element = document.createElement('div')
		element.className = 'element minute-line'
		rotate(anchor, n)
		anchor.appendChild(element)
		dynamic.appendChild(anchor)
	}
	var hour = function(n) {
		var element = document.createElement('div')
		element.className = 'hour-text hour-' + n
		element.innerHTML = n
		position(element, n / 12, 105)
		dynamic.appendChild(element)
	}
	var position = function(element, phase, r) {
		var theta = phase * 2 * Math.PI
		element.style.top = (-r * Math.cos(theta)).toFixed(1) + 'px'
		element.style.left = (r * Math.sin(theta)).toFixed(1) + 'px'
	}
	var rotate = function(element, second) {
		element.style.transform = element.style.webkitTransform = 'rotate(' + (second * 6) + 'deg)'
	}
	var animate = function() {
		var now = new Date()
		var time = now.getHours() * 3600 +
			now.getMinutes() * 60 +
			now.getSeconds() * 1 +
			now.getMilliseconds() / 1000
		rotate(secondElement, time)
		rotate(minuteElement, time / 60)
		rotate(hourElement, time / 60 / 12)
		requestAnimationFrame(animate)
	}
	for (var i = 1; i <= 60; i++) minute(i)
	for (var i = 1; i <= 12; i++) hour(i)
	animate()
}

function autoResize(element, nativeSize) {
	var update = function() {
		var scale = Math.min(window.innerWidth, window.innerHeight) / nativeSize
		element.style.transform = element.style.webkitTransform = 'scale(' + scale.toFixed(3) + ')'
	}
	update()
	window.addEventListener('resize', update)
}
</script>
<script language="javascript" type="text/javascript" src="//www.beijing-time.org/t.js"></script>
</body>
</html>