居中问题：
尝试了一般的居中方法，无效果
display: flex;justify-content: center;align-items: center;
放到导航栏下面不居中
放到页面底部还是不居中
Code
<iframe id="demo_sanshui" src="demo_sanshui.html" width="120%" height="100%" scrolling="no" frameborder="0"></iframe>
HTML
<!DOCTYPE html>
<html lang="en"><head><meta charset="UTF-8" /><meta name="viewport" content="width=device-width, initial-scale=1.0" /><title>Document</title><link rel="stylesheet" href="./css/daoshi1.css" /><!-- 继承（相对定位） --><script>window.parent.$(function() { // 使用 vindow.parent 调用父级 jqueryvar head = document.getElementsByTagName("head").item(0);var linkList = window.parent.document.getElementsByTagName("link"); // 获取父窗口 link 标签对象列表for (var i = 0; i < linkList.length; i++) {var _link = document.createElement("link");_link.rel = 'stylesheet';_link.type = 'text/css';_link.href = linkList[i].href;head.appendChild(_link);}});</script>
</head><body><div class="column_wrapper" id="" data-spm=""><div class="nav2_ind04" id=""><div class="textTab" id="nav02" data-spm="EuhLU9mTLz1p" data-spm-max-idx="2"><div class="left"><h3><a href="#" target="_blank" data-spm-anchor-id="C28340.PdNvWY0LYxCP.EuhLU9mTLz1p.1">精彩呈现</a></h3></div><div class="clear"></div></div><div class="content" id="zbds_top" data-spm="EuhLU9mTLz1p"><div class="con"><ul style="margin-left: 0px"><li><div class="li_con"><div class="img"><a href="table.html" target="_blank"><img h5-src="" src="./images/san.png" /><i>山水</i></a></div><div class="title" id="time0"><a href="" target="_blank">#三板片区综合服务站 02-23</a></div><div class="brief" id="title_0"><a title="三板村“攻略”" href="https://www.jianpian.cn/a/cb4vwu5?sc=groupmessage&s_uid=2937179&a_uid=2937179&sd=1" target="_blank">三板村“攻略”</a></div></div><span class="li_line"></span></li><li><div class="li_con"><div class="img"><a href="#" target="_blank"><img h5-src="" src="./images/Flamingo.png" /><i>鸟兽</i></a></div><div class="title" id="time1"><ahref="https://mp.weixin.qq.com/s/2Z3NfYj3eszgSWagNTsCLw"target="_blank">#方志广东 2021-06-04</a></div><div class="brief" id="title_1"><atitle="新闻调查"href="https://mp.weixin.qq.com/s/2Z3NfYj3eszgSWagNTsCLw"target="_blank">千鸟翔集的岭南水乡</a></div></div><span class="li_line"></span></li><li><div class="li_con"><div class="img"><a href="" target="_blank"><img h5-src="" src="./images/政策解读.png" /><i>政策</i></a></div><div class="title" id="time2"><ahref="http://dara.gd.gov.cn/snnyxxlb/content/post_3130231.html"target="_blank">#南方日报 2020-11-19</a></div><div class="brief" id="title_2"><atitle="古村焕新记"href="http://dara.gd.gov.cn/snnyxxlb/content/post_3130231.html"target="_blank">古村焕新记</a></div></div><span class="li_line"></span></li><li><div class="li_con"><div class="img"><a href="#" target="_blank"><imgh5-src="./images/皮划艇.png"src="./images/皮划艇.png"/><i>人文</i></a></div><div class="title" id="time3"><ahref="https://www.sohu.com/a/722923449_121106875"target="_blank">#珠海金湾 2023-09-23</a></div><div class="brief" id="title_3"><atitle="开门大吉-2023-43"href="https://www.sohu.com/a/722923449_121106875"target="_blank">丰收盛会水乡欢腾</a></div></div><span class="li_line"></span></li><!-- 新增一个主题，但无法显示（失败） --><!-- <li><div class="li_con"><div class="img"><a href="" target="_blank"><img h5-src="" src="./images/政策解读.png" /><i>改变</i></a></div><div class="title" id="time4"><ahref="http://dara.gd.gov.cn/snnyxxlb/content/post_3130231.html"target="_blank">#南方日报 2020-11-19</a></div><div class="brief" id="title_4"><atitle="古村焕新记"href="http://dara.gd.gov.cn/snnyxxlb/content/post_3130231.html"target="_blank">古村焕新记</a></div></div><span class="li_line"></span></li> --></ul></div></div></div></div><script>window.parent.$(function () { // 使用 vindow.parent 调用父级 jqueryvar body = document.getElementsByTagName("body").item(0);var scriptList = window.parent.document.getElementsByTagName("script"); // 获取父窗口 script 标签对象列表for (var i =0 ; i < scriptList.length; i++) {var _script = document.createElement("script");_script.type = 'text/script';_script.src = scriptList[i].src;body.appendChild(_script);}});</script></body>
</html>
CSS
* {-webkit-text-size-adjust: none;text-size-adjust: none;-webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}body,
div,
p,
ul,
ol,
dl,
dt,
dd,
li,
form,
input,
table,
img,
h1,
h2,
h3,
h4,
h5,
h6 {margin: 0;padding: 0;
}body {color: #222222;background: #fff;margin-top: 0;font-family: PingFangSC-Regular, Helvetica, Arial, Microsoft Yahei, sans-serif;margin: 0 auto;min-width: 1022px;background-repeat: no-repeat;background-position: center center;
}a {color: #222222;text-decoration: none;/*outline: none;*/
}ul,
ol {list-style-type: none;
}em,
b,
i {font-style: normal;
}ul:after,
ol:after {clear: both;content: ".";display: block;font-size: 0;height: 0;line-height: 0;visibility: hidden;
}.clear {height: 0px;line-height: 0;font-size: 0;overflow: hidden;clear: both;
}/*默认分辨率小于1279 ，内容宽度962*/.column_wrapper {width: 1500px;margin: 0 auto;clear: both;position: relative;
}/*标题栏*/.textTab {clear: both;padding-bottom: 10px;
}/* 直播导视 */.nav2_ind04 .content {border-top: 2px solid #e5e5e5;padding: 0px 28px;position: relative;
}.nav2_ind04 .content .con ul li {padding: 28px 0px 26px 0;float: left;position: relative;
}.nav2_ind04 .content .con {position: relative;z-index: 1;overflow: hidden;
}.nav2_ind04 .content .con ul {width: 99999px;
}.nav2_ind04 .content .con ul li .img i {font-size: 18px;color: #000000;line-height: 21px;font-weight: bold;margin-left: 10px;
}.nav2_ind04 .content .con ul li .img a {width: 100%;display: block;line-height: 21px;
}.nav2_ind04 .content .con ul li .title {font-size: 14px;line-height: 24px;margin: 5px auto 10px 0px;color: #222222;
}.nav2_ind04 .content .con ul li .title a {color: #222222;
}.nav2_ind04 .content .con ul li .brief {font-size: 14px;line-height: 24px;color: #222222;height: 42px;
}.nav2_ind04 .content .con ul li .li_line {background: #0084ff;width: 186px;height: 2px;position: absolute;bottom: 0;left: 20px;display: none;
}.nav2_ind04 .content .con ul li .brief a {color: #222222;display: block;width: 100%;height: 100%;line-height: 24px;
}.nav2_ind04 .content .con ul li .li_con {border-right: 1px solid #e7e7e7;padding: 8px 20px 0px 20px;height: 104px;width: 186px;
}
![[HCIE] IPSec-VPN (IKE自动模式)](https://img-blog.csdnimg.cn/6fe35169573e49659bbf4a457236cf5b.png)
