元素环绕

效果如图: 代码实现: <style> *{ margin: 0; padding: 0; box-sizing: border-box; } .surround-box, .center-point{ position: absolute; top: 50%; left: 50%; width: 20px; height: 20px; margin-left: -10px;...

效果如图: 代码实现: <style>*{margin:0;padding:0;box-sizing:border-box;}.surround-box,.center-point{position:absolute;top:50%;left:50%;width:20px;height:20px;margin-left:-10px;margin-top:-10px...