因layui存在跨版本的兼容性问题，回退到2.7.0-rc4版本

CoreCms.Net.Web.Admin/wwwroot/lib/layui/css/modules/code.css

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-html #layuicss-skincodecss{display:none;position:absolute;width:1989px}.layui-code-view{display:block;position:relative;margin:10px 0;padding:0;border:1px solid #eee;border-left-width:6px;background-color:#fafafa;color:#333;font-family:Courier New;font-size:12px}.layui-code-h3{position:relative;padding:0 10px;height:40px;line-height:40px;border-bottom:1px solid #eee;font-size:12px}.layui-code-h3 a{position:absolute;right:10px;top:0;color:#999}.layui-code-view .layui-code-ol{position:relative;overflow:auto}.layui-code-view .layui-code-ol li{position:relative;margin-left:45px;line-height:20px;padding:0 10px;border-left:1px solid #e2e2e2;list-style-type:decimal-leading-zero;*list-style-type:decimal;background-color:#fff}.layui-code-view .layui-code-ol li:first-child{padding-top:10px}.layui-code-view .layui-code-ol li:last-child{padding-bottom:10px}.layui-code-view pre{margin:0}.layui-code-notepad{border:1px solid #0c0c0c;border-left-color:#3f3f3f;background-color:#0c0c0c;color:#c2be9e}.layui-code-notepad .layui-code-h3{border-bottom:none}.layui-code-notepad .layui-code-ol li{background-color:#3f3f3f;border-left:none}.layui-code-demo .layui-code{visibility:visible!important;margin:-15px;border-top:none;border-right:none;border-bottom:none}.layui-code-demo .layui-tab-content{padding:15px;border-top:none}
+html #layuicss-skincodecss{display:none;position:absolute;width:1989px}.layui-code-h3,.layui-code-view{position:relative;font-size:12px}.layui-code-view{display:block;margin:10px 0;padding:0;border:1px solid #eee;border-left-width:6px;background-color:#FAFAFA;color:#333;font-family:Courier New}.layui-code-h3{padding:0 10px;height:40px;line-height:40px;border-bottom:1px solid #eee}.layui-code-h3 a{position:absolute;right:10px;top:0;color:#999}.layui-code-view .layui-code-ol{position:relative;overflow:auto}.layui-code-view .layui-code-ol li{position:relative;margin-left:45px;line-height:20px;padding:0 10px;border-left:1px solid #e2e2e2;list-style-type:decimal-leading-zero;*list-style-type:decimal;background-color:#fff}.layui-code-view .layui-code-ol li:first-child{padding-top:10px}.layui-code-view .layui-code-ol li:last-child{padding-bottom:10px}.layui-code-view pre{margin:0}.layui-code-notepad{border:1px solid #0C0C0C;border-left-color:#3F3F3F;background-color:#0C0C0C;color:#C2BE9E}.layui-code-notepad .layui-code-h3{border-bottom:none}.layui-code-notepad .layui-code-ol li{background-color:#3F3F3F;border-left:none}.layui-code-demo .layui-code{visibility:visible!important;margin:-15px;border-top:none;border-right:none;border-bottom:none}.layui-code-demo .layui-tab-content{padding:15px;border-top:none}