字体图标使用

自己总结的：
打开这里提到的阿里链接http://at.alicdn.com/t/font_2269940_s3bmewe0hbn.css

↓最方便做法 ——拥有content和font-family即可

.nav .dropdown dd ul li::after {
    content: "e809";
    font-family: "iconfont";
    /*font-size: 1px;
    color: #fff;
    position: absolute;
    right: 5px;*/
}

@font-face {font-family: "iconfont";
  src: url('//at.alicdn.com/t/font_2269940_s3bmewe0hbn.eot?t=1608266658007'); /* IE9 */
  src: url('//at.alicdn.com/t/font_2269940_s3bmewe0hbn.eot?t=1608266658007#iefix') format('embedded-opentype'), /* IE6-IE8 */
  url('data:application/x-font-woff2;charset=utf-8;base64,d09GMgABAAAAAAPAAAsAAAAACCgAAANxAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAHEIGVgCDHAqDZIMpATYCJAMQCwoABCAFhG0HRxsaBxHVmwXJfh6UcTlLcEoILneXNu5sGmXU977j4Wvsf+fu3vf+ftckmhSaaCUx3SQRLZLxkpmuIVFJEsVC8f9/f3UHem9hVSWhfc0skQw1qM1u9OlW+vtte5qVtJCw+Kt2zyc7BcYb40sAXBxOmxNsvtV2HGvQ3hx1AcYBBTTGsChewAVSzg1jF7TE0wT6LNkWJ32DSWiSOSkQN5MTo6Fl7LKhOjShW7EyIR6CQCt13BM8CD4f3+2EGBSdCubMs5d94uDoJ9U7Ca+ULRXmIUAxnRdsHRXbSOJqpf+8GqW2VX3qb9IBmqbwSfWm9U7CslB5FH2zApTBf150wawcAHswXfmk6vApfGrlU/kiUT7ASQkaRvEMwAvAlAUSYVjM2GVQwuf7vVWj67vLtBN7ejg9WgnRLj0NmvFzOn02cZ0FoZyybqREd7v7ofrO0i6MZV2avTB02rBnXKaHOxX0Tq+eEEyiGEwhioY6Mhg/PV+20DBXOssgGnMckCEONm6S1XoYTNuzyESmZ2auT4PsrNeiuwfKZ2ga3pPIR+ntA8qAr1zrW2jVTH789qGPsoKv9yrxcNhLsoSP5tGSYapwRjSO5jXmUVvFm2v5oR5P2Z/laR89B2RhHhvA8vQON4i8IjUqg6WaRFSpRYk2lS+iIm3j3TzGpUSlxsJC5NT1FDNiKsouAV6WYpchogrKKIaOkiXQKa4ZdLHDWRumQbGUKLO9jzoF/y2Pj+ZWCdx/fSU3k19f9yl4Gs5DKvhfVv55JYD6rpxDrZyfH/sd8WvxHans8d0wH+A9lxwLQv/LEobJ/46is+I3Kjo2paYyHZmK2pHrF6WbhkFBnz78vBxjPk4RnCTxhsYVEIoei1A1y8jEbkNHvz3oao5Any1n1vcbd0sVKQE23QcQRjyHYsgbqEa8RSb2A3RM+QldI8GDPudCfcd+q3rE5sioBC3oP0RDi7Nd0oTVN/T7pDitClgv5C1GYWj7fPaKC/IUc7aPH0UcOKYZLuA8nCaClSmhkTaIrIeuc1U3ag3NRePIqAQt0H8QDS3Oay9N4f039PukuKGhKvtC3mL3YNDqOyCv+qVTw61cs338SMQBxzSDC/DiZKUIrNXDEhpphQGJ9aBDrVxXfbu8cX7DHdDHvC6jRI2Mjup2UEtWcag87d/dBCwLtqIAAAAA') format('woff2'),
  url('//at.alicdn.com/t/font_2269940_s3bmewe0hbn.woff?t=1608266658007') format('woff'),
  url('//at.alicdn.com/t/font_2269940_s3bmewe0hbn.ttf?t=1608266658007') format('truetype'), /* chrome, firefox, opera, Safari, Android, iOS 4.2+ */
  url('//at.alicdn.com/t/font_2269940_s3bmewe0hbn.svg?t=1608266658007#iconfont') format('svg'); /* iOS 4.1- */
}

.iconfont {
  font-family: "iconfont" !important;
 /* font-size: 16px;注释掉比较方便*/
  font-style: normal;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.icon-zhankai1:before {
  content: "e809";
}

.icon-gouwuche:before {
  content: "e611";
}

.icon-zhankai:before {
  content: "e690";
}

这样方便修改before，after，color，font-size之类的属性

.icon-zhankai1::after {
    content: "e809";
    margin-left: 11px;
}

.icon-gouwuche:before {
    content: "e611";
    color: #c81623;
    font-size: 20px;
}

.icon-zhankai:before {
    content: "e690";
}