正方形根据各种屏幕自适应 按比例布局

html部分： <div><span>1</span></div> <div><span>2</span></div> <div><span>3</span></div> <div><span>4</span></div> <div><span>5</span></div> <div><span>6</span></div> <div><span>7</span></div> <div><span

>>阅读原文<<