.sec {
  width: 100%;
  overflow: hidden;
}
.sec .title {
  margin: 70px 0 100px;
}
.sec .title h1{
  text-align: center;
}
.sec .img {
  width: 100%;
  display: flex;
  justify-content: center;
  margin-bottom: 109px;
}
.section2 {
  width: 100%;
  background: #F5F5F7;
  overflow: hidden;
}
.section2 .joke {
  margin: 95px 0 146px;
  position: relative;
}
.section2 .joke .swiper {
  width: 145%;
  position: relative;
  left: 50%;
  transform: translateX(-50%);
}
.section2 .joke .swiper .swiper-slide img {
  width: 100%;
  transform: scale(0.78);
  transition: 1s;
}
.section2 .joke .swiper .swiper-slide-active img{
transform: scale(1);
}
.section2 .joke .swiper .swiper-slide p {
  font-size: 16px;
  font-family: Helvetica;
  font-weight: 400;
  color: #666666;
  text-align: center;
  opacity: 0;
  margin-top: 31px;
}
.section2 .joke .swiper .swiper-slide-active p {
  opacity: 1;
  transition: 0.6s;
}
.section2 .joke .button {
  display: flex;
  position: absolute;
  bottom: -10px;
  left: 67%;
  z-index: 2;
}
.section2 .joke .button .circle{
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid #CCCCCC;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
}
.section2 .joke .button .circle .iconfont {
  font-size: 14px;
  color: #666666;
}
.section2 .joke .button .circle:nth-child(1) {
  margin-right: 10px;
}
.section2 .joke .button .circle:nth-child(1) .iconfont {
  transform: rotate(-180deg);
}
@media screen and (max-width: 1700px) {
  .sec .img {
    width: 90%;
    margin: 0 auto 109px;
  }
  .sec .img img {
    width: 100%;
  }
}
@media screen and (max-width: 1024px) {
  .sec .title h1 {
    font-size: 24px;
  }
  .sec .title {
    margin: 40px 0;
  }
  .section2 .joke {
    width: 90%;
    margin: 40px auto;
  }
  .section2 .joke .swiper {
    width: 100%;
  }
  .section2 .joke .button {
    position: unset;
    justify-content: center;
  }
}