*{ box-sizing: border-box ;}
html,body,p{ margin: 0;padding: 0;}
html{padding-bottom:20px;}
a{ text-decoration: none;}
.flex {display: flex;}
.flex-wrap{display: flex;flex-wrap: wrap;align-content: flex-start;}
.flex-end{display: flex;justify-content: flex-end;align-items: center;}
/* flex垂直排列 */
.flex-col {display: flex;flex-direction: column;}
/* flex全居中 */
.flex-center {display: flex;align-items: center;justify-content: center;}
/* flex竖向全居中 */
.flex-center-col {display: flex;flex-direction: column;align-items: center;justify-content: center;}
/* flex垂直居中 */
.flex-center-y {display: flex;align-items: center;}
/* flex水平居中 */
.flex-center-x {display: flex;justify-content: center;}
/* flex左右靠边 */
.flex-between {display: flex;align-items: center;justify-content: space-between;}
/* 水平均匀分布 */
.flex-around{display: flex;justify-content: space-around;align-items: center;}

section .inner{
  width: 1140px;
  margin:  0 auto;
  padding: 60px 0;
}
section .title{
  padding: 0 0 45px 0;
}
section .title p{
  font-size: 45px;
  font-weight: bold;
  position: relative;
}
section .title span{
  font-size: 18px;
  color: #666666;
  margin-top: 10px;
}
section .title p::after{
  content: '';
  position: absolute;
  width: calc(100% + 30px);
  left: 0;
  right: 0;
  margin-left: -15px;
  bottom: -3px;
  background: rgba(20,165,116,.3);
  z-index: 0;
  height: 20px;

}