.index-about-box{
  width: 1720px;
  max-width: 100%;
  display: block;
  margin: 0 auto;
  height: 700px;
  overflow: hidden;
  position: relative;
}

.index-about-img-box{
  width: 100%;
  height: 100%;
  display: block;
  position: relative;
  background-color: #000;
}
.index-about-bg{
  width: 100%;
  height: 120%;
  display: block;
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center;
  transition: all .5s ease;
  opacity: 0.4;
  position: relative;
}
.index-about-mask{
  width: 100%;
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  display: block;
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center;
  background-image: url(../img/front/about-mask.jpg);
  opacity: 0.05;
}
.index-about-info-box{
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  display:         flex;
   display: -webkit-flex;
          align-items: center;
  -webkit-align-items: center;
          justify-content: center;
  -webkit-justify-content: center;
   flex-direction:column;
  -webkit-flex-direction:column;
}
.index-about-title{
  font-size: 20px;
  color: #FFF;
  text-align: center;
  letter-spacing: 1px;
  margin-bottom: 10px;
}
.index-about-p{
  font-size: 16px;
  color: #FFF;
  letter-spacing: 1px;
  margin-top: 5px;
}