CSS引导列超出行?

      <div class="row">

        <div class="col-md-4">
          <div class="ticket_statistic_box">
            <div class="row">
              <div class="col-sm-5 iconarea">
                <span class="   fa fa-briefcase ticket-icon"></span>
              </div>
              <div class="col-sm-6">
                <div class="ticket_statistic_box_information">
                  <span>Total</span>
                  <span>0</span>
                </div>
              </div>
            </div>
          </div>
        </div>

      </div>

.iconarea 到白色,这是行中票证统计框的左侧部分,结果如下:

看看左边,再看看右边,它应该只填充背景部分 .ticket_statistic_box ,但它到外面去了?

.ticket_statistic_box {
  height: 100px;
  background-color: rgba(0, 0, 0, 0.3);
  display: block;
  margin-top: 10px;
  text-align: center;
}

.ticket_statistic_box span.ticket-icon {
  line-height: 110px;
}

.ticket_statistic_box_information span {
  display: block;
  padding: 0;
}

.ticket_statistic_box_information span:first-child {
  font-weight: bold;
  font-size: 20px;
  text-align: center;
  margin-top: 15px;
}

.ticket_statistic_box_information span:last-child {
  font-weight: bold;
  font-size: 30px;
  text-align: center;
  color: #eda248;
}

.ticket-icon {
  color: #eda248;
  font-weight: lighter;
  font-size: 50pt;
}

.iconarea {
  background-color: white;
}

我犯了什么严重的错误吗?