【设计】拟物时钟-夜间模式切换

先看效果：

HTML代码：

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>拟物时钟-夜间模式切换</title>
<link rel="stylesheet" href="style.css">
</head>

<body>
<div class="clock">
        <div class="hour">
                <div class="hr" id="hr"></div>
        </div>
        <div class="min">
                <div class="mn" id="mn"></div>
        </div>
        <div class="sec">
                <div class="sc" id="sc"></div>
        </div>
</div>
<div class="toggleClass" onclick="toggleClass()"></div>
<script type="text/javascript">
        function toggleClass(){
            const body = document.querySelector('body');
            body.classList.toggle('light');
        }

        const deg = 6;
        const hr = document.querySelector('#hr');
        const mn = document.querySelector('#mn');
        const sc = document.querySelector('#sc');
        setInterval(() => {
            let day = new Date();
            let hh = day.getHours() * 30;
            let mm = day.getMinutes() * deg;
            let ss = day.getSeconds() * deg;
            hr.style.transform = `rotateZ(${hh+(mm/12)}deg)`;
            mn.style.transform = `rotateZ(${mm}deg)`;
            sc.style.transform = `rotateZ(${ss}deg)`;

        })

    </script>
</body>
</html>

CSS

* {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
}
body {
        display: flex;
        justify-content: center;
        align-items: center;
        min-height: 100vh;
        background: #091921;
}
body.light {
        background: #d1dae3;
}
.clock {
        width: 350px;
        height: 350px;
        display: flex;
        justify-content: center;
        align-items: center;
        background: #091921 url(clock.PNG);
        background-size: cover;
        border: 4px solid #091921;
        border-radius: 50%;
        box-shadow: 0 -15px 15px rgba(255, 255, 255, .05), inset 0 -15px 15px rgba(255, 255, 255, .05), 0 15px 15px rgba(0, 0, 0, .3), inset 0 15px 15px rgba(0, 0, 0, .3);
}
body.light .clock {
        background: #d1dae3 url(clock.PNG);
        background-size: cover;
        border: 4px solid #cad3dc;
        box-shadow: -8px -8px 15px rgba(255, 255, 255, .5), inset -9px -8px 15px rgba(255, 255, 255, .5), 10px 10px 10px rgba(0, 0, 0, .1), inset 10px 10px 10px rgba(0, 0, 0, .1);
}
.clock::before {
        content: '';
        position: absolute;
        width: 15px;
        height: 15px;
        background: #fff;
        border-radius: 50%;
        z-index: 100000;
}
body.light .clock::before {
        background: #008eff;
}
.hour, .min, .sec {
        position: absolute;
}
.hour, .hr {
        width: 160px;
        height: 160px;
}
.min, .mn {
        width: 190px;
        height: 190px;
}
.sec, .sc {
        width: 230px;
        height: 230px;
}
.hr, .mn, .sc {
        display: flex;
        justify-content: center;
        position: absolute;
        border-radius: 50%;
}
.hr::before {
        content: '';
        position: absolute;
        width: 8px;
        height: 80px;
        background: #ff105e;
        z-index: 10;
        border-radius: 6px 6px 0 0;
}
.mn::before {
        content: '';
        position: absolute;
        width: 4px;
        height: 90px;
        background: #fff;
        z-index: 11;
        border-radius: 6px 6px 0 0;
}
body.light .mn::before {
        background: #091921;
}
.sc::before {
        content: '';
        position: absolute;
        width: 2px;
        height: 150px;
        background: #008eff;
        z-index: 12;
        border-radius: 6px 6px 0 0;
}
.toggle {
        position: absolute;
        top: 30px;
        right: 150px;
        width: 20px;
        height: 20px;
        font-size: 18px;
        border-radius: 50%;
        background: #d1dae3;
        color: #d1dae3;
        font-family: consolas;
        cursor: pointer;
        left: 25px;
        white-space: nowrap;
}
.toggleClass {
        position: absolute;
        top: 30px;
        right: 150px;
        width: 20px;
        height: 20px;
        font-size: 18px;
        border-radius: 50%;
        background: #d1dae3;
        color: #d1dae3;
        font-family: concolas;
        cursor: pointer;
        display: flex;
        align-items: center;
}
.toggleClass:before {
        position: absolute;
        left: 25px;
        content: "日间模式";
        white-space: nowrap;
}
body.light .toggleClass {
        background: #091921;
        color: #091921;
}
body.light .toggleClass:before {
        content: "夜间模式";
}