如何在iPhones和所有web浏览器中居中显示css菜单

<div class="container">
  <ul class="menu">
    <li>菜单项1</li>
    <li>菜单项2</li>
    <li>菜单项3</li>
  </ul>
</div>

.container {
  display: flex;
  justify-content: center;
}

.menu {
  list-style: none;
  display: flex;
  justify-content: center;
}

.menu li {
  margin: 0 10px;
}

<div class="container">
  <ul class="menu">
    <li>菜单项1</li>
    <li>菜单项2</li>
    <li>菜单项3</li>
  </ul>
</div>

.container {
  position: relative;
}

.menu {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  list-style: none;
  display: flex;
}

.menu li {
  margin: 0 10px;
}