对我的视图的约束不起作用。如何才能使我的标签文本保持在指南的范围内？

.box {
  width: 200px;
  padding: 10px;
  border: 1px solid #000;
  margin: 10px;
}

.container {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 200px;
  height: 200px;
  border: 1px solid #000;
}

.box {
  max-width: 100%;
  overflow-wrap: break-word;
}

<div class="container">
  <div class="box">这是一个很长的标签文本，需要保持在指南的范围内。</div>
</div>

.container {
  display: grid;
  place-items: center;
  width: 200px;
  height: 200px;
  border: 1px solid #000;
}

.box {
  max-width: 100%;
  overflow-wrap: break-word;
}

<div class="container">
  <div class="box">这是一个很长的标签文本，需要保持在指南的范围内。</div>
</div>

.clearfix::after {
  content: "";
  display: table;
  clear: both;
}

.box {
  float: left;
  width: 100px;
  height: 100px;
  border: 1px solid #000;
}

<div class="clearfix">
  <div class="box">Box 1</div>
  <div class="box">Box 2</div>
</div>