*{margin:0;padding:0;}
body{width:100%;max-width:640px;min-width:320px;background:#ccc}
.exclamationCircle{display:inline-block; position:relative;width:90px;height:90px;border:5px solid #fff; border-radius:50%}
.exclamationCircle:before{content: '';position: absolute;width: 20px;height: 45px;background: #fff;left: 50%;margin-left: -10px;top: 8%;border-radius: 60% 60% 90% 90%; }
.exclamationCircle:after{content: '';position: absolute;width: 20px;height: 20px;background: #fff;border-radius: 50%;left: 50%;margin-left: -10px;bottom: 10px;}