<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
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<title>无标题文档</title>
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div {
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border-top: 40px solid #ff0000;
border-left: 10px solid transparent;
border-right: 5px solid transparent;
}
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<body>
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时间： 2024-08-17 14:21:20