SOURCE

<iframe frameborder="0" src="https://v.qq.com/txp/iframe/player.html?vid=e32673ut4t2" allowFullScreen="allowfullscreen"></iframe>

<!-- <iframe marginheight="0" frameborder="0" allowfullscreen="" scrolling="no" src="https://v.qq.com/iframe/player.html?vid=y3246tlvxnz" style="font-family: -apple-system-font, BlinkMacSystemFont, &quot;Helvetica Neue&quot;, &quot;PingFang SC&quot;, &quot;Hiragino Sans GB&quot;, &quot;Microsoft YaHei UI&quot;, &quot;Microsoft YaHei&quot;, Arial, sans-serif; text-align: center; width: 100%; height: 100%; max-height: 100%; border-width: initial; border-style: none; overflow: hidden; box-sizing: border-box;"></iframe> -->

#d1
{
  width: 50px;
  height: 50px;
  background-color: aqua;
  display: inline-block;
}
#d2
{
  width: 100px;
  height: 50px;
  background-color: black;
  float: left;
  clear: both;
}
#d3
{
  width: 150px;
  height: 50px;
  background-color: orange;
  float: left;
}
#d4
{
  width: 300px;
  height: 50px;
  background-color: yellow;
  /*  clear:both;*/
}