<div class="ssmic"> <div class="czjz"> <form action="{pboot:scaction}" method="get" > <input type="text" name="keyword" > <button type="submit">搜索</button> </form> </div> </div> .ssmic { width: 1200px; height: 1000px; display: flex; flex-wrap: nowrap; align-content: center; justify-content: center; align-items: center; }
在这里实现垂直居中必须要给一个高度
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