来源于GPT4o：代码来源
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<head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>渐变色上半圆</title><style>body {display: flex;justify-content: center;align-items: center;height: 100vh;margin: 0;background-color: #f0f0f0;}.half-circle {width: 200px;height: 100px;background: linear-gradient(to bottom, #ff7e5f, #feb47b); /* 渐变色从上到下 */border-top-left-radius: 100px;border-top-right-radius: 100px;/* 隐藏下半部分 */border-bottom-left-radius: 0;border-bottom-right-radius: 0;}</style>
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