<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>天地阴阳</title><style>* {padding: 0;margin: 0;box-sizing: border-box;}html, body {height: 100%;}.container {height: 100%;display: flex;flex-direction: column;position: relative;}.sky {flex: 1;background: linear-gradient(to bottom, #87CEEB, #E0F6FF);}.earth {height: 50%;background: linear-gradient(to bottom, #90EE90, #228B22);}.box {position: absolute;left: 50%;top: 50%;transform: translate(-50%, -50%);width: 300px;height: 300px;border-radius: 50%;box-shadow: 0 0 30px rgba(0, 0, 0, 0.3);animation: rotate 8s linear infinite;transform-origin: center center;backdrop-filter: blur(5px);}.semi-circle {position: absolute;height: 100%;width: 50%;}.left {left: 0;background: #000;border-radius: 150px 0 0 150px;width: 50%;}.right {right: 0;background: #fff;border-radius: 0 150px 150px 0;width: 50%;}.box {position: absolute;left: 50%;top: 50%;transform: translate(-50%, -50%);width: 300px;height: 300px;border-radius: 50%;box-shadow: 0 0 30px rgba(0, 0, 0, 0.3);animation: rotate 8s linear infinite;transform-origin: center center;backdrop-filter: blur(5px);background: rgba(255, 255, 255, 0.8); }.circle {position: absolute;left: 25%;width: 50%;height: 50%;border-radius: 50%;display: flex;align-items: center;justify-content: center;}.top-circle {top: 0;background: #000; }.bottom-circle {bottom: 0;background: #fff; }.small-circle {width: 30px;height: 30px;border-radius: 50%;}.white { background: #fff; } .black { background: #000; } @keyframes rotate {from { transform: translate(-50%, -50%) rotate(0deg); }to { transform: translate(-50%, -50%) rotate(360deg); }}.box:hover {animation-play-state: paused;box-shadow: 0 0 40px rgba(0, 0, 0, 0.4);}</style>
</head>
<body><div class="container"><div class="sky"></div><div class="earth"></div><div class="box"><div class="semi-circle left"></div><div class="semi-circle right"></div><div class="circle top-circle"><span class="small-circle white"></span></div><div class="circle bottom-circle"><span class="small-circle black"></span></div></div></div>
</body>
</html>
![Altium Designer 24 PCB编辑器[设计]栏找不到[规则]选项而只有[Constraints Manager]选项](http://pic.xiahunao.cn/nshx/Altium Designer 24 PCB编辑器[设计]栏找不到[规则]选项而只有[Constraints Manager]选项)