/* 超小设备（手机，小于 768px） */
@media (min-width: 0) {
  .com-a {
    padding-top: 24px;
    background-color: #f4f8fc;
    padding-bottom: 80px;
    text-align: center;
  }
  .com-a .container > .c-title {
    font-size: 24px;
    color: #222;
  }
  .com-a .container > .c-sub-title {
    font-size: 16px;
    color: #999999;
  }
}
@media (max-width: 767px) {
  .com-a .c-box {
    margin-top: 60px;
  }
  .com-a .c-box .c-item {
    position: relative;
  }
  .com-a .c-box .c-item img {
    display: block;
    margin: 0 auto;
    width: 170px;
    height: 170px;
  }
  .com-a .c-box .c-item .c-title {
    font-size: 18px;
    color: #222;
  }
  .com-a .c-box .c-item .c-sub-title {
    color: #999999;
  }
  .com-a .c-box .c-item .c-btn-box {
    margin-top: 18px;
  }
  .com-a .c-box .c-item .c-btn {
    padding: 10px 15px;
    -webkit-border-radius: 20px;
       -moz-border-radius: 20px;
            border-radius: 20px;
    background-color: #4f72ec;
    color: #fff;
  }
  .com-a .c-box .c-item:last-child {
    margin-top: 60px;
  }
}
/* 小型设备（平板电脑，768px 起） */
@media (min-width: 768px) {
  .com-a .c-box {
    display: -webkit-box;
    display: -webkit-flex;
    display: -moz-box;
    display: -ms-flexbox;
    display: flex;
    margin-top: 60px;
  }
  .com-a .c-box .c-item {
    -webkit-box-flex: 1;
    -webkit-flex: 1;
       -moz-box-flex: 1;
        -ms-flex: 1;
            flex: 1;
    min-width: 0;
    position: relative;
  }
  .com-a .c-box .c-item img {
    display: block;
    margin: 0 auto;
    width: 170px;
    height: 170px;
  }
  .com-a .c-box .c-item .c-title {
    font-size: 18px;
    color: #222;
  }
  .com-a .c-box .c-item .c-sub-title {
    color: #999999;
  }
  .com-a .c-box .c-item .c-btn-box {
    margin-top: 18px;
  }
  .com-a .c-box .c-item .c-btn {
    padding: 10px 15px;
    -webkit-border-radius: 20px;
       -moz-border-radius: 20px;
            border-radius: 20px;
    background-color: #4f72ec;
    color: #fff;
  }
  .com-a .c-box .c-item:before {
    content: "";
    position: absolute;
    right: 0;
    top: 10%;
    bottom: 10%;
    border-right: 1px solid #e5e5e5;
  }
  .com-a .c-box .c-item:last-child:before {
    display: none;
  }
}