.n_banner .text .p {
  max-width: 400px;
}
.ctn1 {
  padding: 9vw 0 10vw;
  background: url(/static/img/develop/bg1.jpg) no-repeat;
  background-size: cover;
}
.ctn1 .s-title h2 {
  text-align: center;
}
.ctn1 .text {
  width: 100%;
  color: #777;
  margin: 0 auto;
  line-height: 1.8;
  margin-top: 3vw;
}
.ctn2 {
  padding: 6vw 0 7vw;
}
.ctn2 .s-title h2 {
  text-align: center;
}
.ctn2 .s-title .p{
    margin-top:10px;color:#777;margin-right: auto;margin-left: auto;
}
.ctn2 .cont{margin-top:3vw;}
.ctn2 .ctn-list {
  margin-top: 3vw;
}
.ctn2 .ctn-list ul {
  display: flex;
  flex-wrap: wrap;
}
.ctn2 .ctn-list ul li {
  width: 32.7%;
  background: #f5f6f7;
  padding: 2vw 2vw 3vw;
  margin-top: 12px;
}
.ctn2 .ctn-list ul li .title {
  display: flex;
  align-items: center;
}
.ctn2 .ctn-list ul li .title img {
  flex-shrink: 0;
  transition: all 0.5s;
  -webkit-transition: all 0.5s;
  -moz-transition: all 0.5s;
  -ms-transition: all 0.5s;
}
.ctn2 .ctn-list ul li .title h2 {
  margin-left: 8px;
}
.ctn2 .ctn-list ul li p {
  margin-top: 20px;
  color: #777;
  line-height: 1.6;
  text-align: justify;
}
.ctn2 .ctn-list ul li:nth-child(1) {
  margin-right: 1%;
}
.ctn2 .ctn-list ul li:nth-child(2) {
  width: 66.3%;
}
.ctn2 .ctn-list ul li:nth-child(3) {
  margin-right: 0.95%;
}
.ctn2 .ctn-list ul li:nth-child(4) {
  margin-right: 0.95%;
}
.ctn2 .ctn-list ul li:nth-child(6) {
  margin-right: 0.95%;
}
.ctn2 .ctn-list ul li:nth-child(7) {
  margin-right: 0.95%;
}
.ctn2 .ctn-list ul li:nth-child(9) {
  margin-right: 0.95%;
}
.ctn2 .ctn-list ul li:hover .title img {
  transform: scale(1.05);
  -webkit-transform: scale(1.05);
  -moz-transform: scale(1.05);
  -ms-transform: scale(1.05);
}
.ctn3 {
  padding: 6vw 0 7vw;
  background: url(/static/img/develop/bg2.jpg) no-repeat;
  background-size: cover;
}
.ctn3 .s-title h2 {
  text-align: center;
}
.ctn3 .text {
  width: 100%;
  color: #777;
  margin: 0 auto;
  line-height: 1.8;
  margin-top:3vw;
}
.ctn3 .text p img{width:100%;}
.ctn4 {
  padding: 9vw 0;
}
.ctn4 .con .tu {
  width: 100%;
  position: relative;
  cursor: pointer;
}
.ctn4 .con .tu video {
  width: 100%;
}
.ctn4 .con .tu:hover span {
  color: #fff;
}
@media screen and (max-width: 1440px) {
  .ctn4 .con .tu span {
    font-size: 50px;
  }
}
@media screen and (max-width: 1024px) {
  .ctn1 .text {
    width: 100%;
  }
  .ctn3 .text {
    width: 100%;
  }
}
@media screen and (max-width: 768px) {
  .ctn1 {
    padding: 40px 0;
  }
  .ctn1 .text {
    font-size: 16px;
    margin-top:20px;
  }
  .ctn3 .text{
      margin-top:20px;
  }
  .ctn2 {
    padding: 40px 0;
  }
  .ctn2 .ctn-list {
    margin-top: 0;
  }
  .ctn2 .ctn-list ul li {
    width: 100%!important;
    margin-right: 0!important;
    margin-top: 20px;
    padding: 20px 20px 30px;
  }
  .ctn2 .ctn-list ul li .title img {
    transform: scale(0.8);
    -webkit-transform: scale(0.8);
    -moz-transform: scale(0.8);
    -ms-transform: scale(0.8);
  }
  .ctn2 .ctn-list ul li p {
    margin-top: 14px;
  }
  .ctn4 {
    padding: 40px 0;
  }
  .ctn4 .con .tu span {
    font-size: 40px;
  }
}
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