代码示例：（保存进test.html）
<!DOCTYPE HTML><html><head><style>
body {text-align:center;}
label {cursor:pointer;font-weight:bold;}
#shit:checked ~ #menu {display:block;}
#shit, #menu {display:none;}</style></head><body><label for="shit">开关菜单</label><input type="checkbox" /><div><a href="" target="_blank">[选项1]</a><br /><a href="" target="_blank">[选项2]</a><br /><a href="" target="_blank">[选项3]</a><br /></div></body></html>
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