主要使用border-radius屬性實現圓，半圓，定位坐標覆蓋部分模塊。
半圓：
width: 50%; height: 100%;
border-radius:100% 0 0 100% /50% 0 0 50%;
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>太極圖</title> <style type="text/css"> .taiji{position: relative; width: 200px; height: 200px; border-radius: 50%; background-color: #fff;border:solid 1px #ccc; animation: spin 6s linear infinite;/*動畫設置*/} .tj_1{position: absolute; top: 0px; width: 50%; height: 100%;} .tj_big1{left: 0px; border-radius:100% 0 0 100% /50% 0 0 50%; background: #000;} .tj_big2{right: 0px; border-radius:0 100% 100% 0 / 0 50% 50% 0; background: #fff;} .tj_2{position: absolute; width: 50%; height: 50%; left: 25%; border-radius: 50%;} .tj_s1{bottom: 0px; background: #fff;} .tj_s2{top: 0px; background: #000;} .tj_ss{position: absolute; width: 25%; height: 25%; left: 37.5%;border-radius: 50%;} .tj_w{top:37.5%;background: #000;} .tj_b{top:37.5%;background: #fff;} /*動畫方法*/ @keyframes spin { 0% { transform:rotate(0deg); } 100% { transform:rotate(360deg); } } </style> </head> <body> <div class="taiji"> <div class="tj_1 tj_big1"></div> <div class="tj_1 tj_big2"></div> <div class="tj_2 tj_s1"> <div class="tj_ss tj_w"></div> </div> <div class="tj_2 tj_s2"> <div class="tj_ss tj_b"></div> </div> </div> </body> </html>