.details-kv {
  background: url(../images/challenge/kv-challenge.jpg) center center no-repeat;
  background-size: cover;
}
.main {
  padding-top: 131px;
  position: relative;
}
.tab {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  padding: 20px 0 35px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  background: #fff;
  z-index: 99;
}
.tab.active {
  position: fixed;
}
.tab ul {
  display: flex;
}
.tab ul li {
  width: 50%;
  border: 1px solid #b3b3b3;
  font-size: 21px;
  padding: 22px 0;
  text-align: center;
  cursor: pointer;
}
.tab ul li:first-child {
  border-right: 0;
}
.tab ul li:last-child {
  border-left: 0;
}
.tab ul li.active {
  color: #fff;
  background: url(../images/challenge/tab-bg.jpg) no-repeat;
  background-size: 100% 100%;
  font-weight: 700;
  border: 0;
}
.news {
  padding: 70px 0 80px;
  background: url(../images/challenge/news-bg.jpg) center center no-repeat;
  background-size: cover;
}
.news .title {
  padding: 0 0 30px;
}
.news ul {
  display: flex;
}
.news ul li {
  width: 50%;
}
.news ul li.text {
  padding-right: 50px;
}
.news ul li.text p {
  font-size: 16px;
  line-height: 1.8;
  padding-bottom: 20px;
}
.news ul li .img-box {
  overflow: hidden;
}
.news ul li .img-box img {
  width: 100%;
  transition: all 0.5s;
}
.news ul li .img-box img:hover {
  transform: scale(1.1);
}
.convoy {
  background: url(../images/challenge/convoy-bg.jpg) center center no-repeat;
  background-size: cover;
  height: 312px;
  text-align: center;
}
.convoy .convoy-box {
  display: inline-block;
  text-align: left;
}
.convoy .convoy-box .title {
  padding-bottom: 0;
}
.convoy .convoy-box .title h2 {
  margin-bottom: 20px;
}
.convoy .convoy-box p {
  font-size: 16px;
  line-height: 1.6;
}
.convoy .convoy-box p span {
  display: block;
}
.convoy .convoy-box .more-url {
  margin-top: 15px;
}
.common-box .all-box {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  padding-top: 20px;
}
.common-box p {
  font-size: 16px;
  line-height: 1.4;
  text-align: center;
  padding: 35px 0 25px;
}
.common-box p span {
  display: block;
}
.program {
  padding-bottom: 80px;
  background: url(../images/challenge/program-bg.jpg) center center no-repeat;
  background-size: cover;
}
.program .program-box {
  padding-top: 20px;
}
.vdi {
  padding-bottom: 80px;
  background: url(../images/challenge/vdi-bg.jpg) center center no-repeat;
  background-size: cover;
}
.vdi .program-box {
  padding-top: 10px;
}
@media (max-width: 1250px) {
  .common-box .all-box img {
    width: 100%;
  }
  .news ul li.text {
    padding-right: 30px;
  }
  .news ul li.text p {
    font-size: 14px;
    line-height: 1.6;
  }
}
@media (max-width: 992px) {
  .details-kv {
    background: url(../images/challenge/kv-challenge-m.jpg) center center no-repeat;
    background-size: cover;
  }
  .main {
    padding-top: 101px;
  }
  .common-box .all-box {
    padding-top: 20px;
  }
  .common-box p {
    font-size: 14px;
    padding: 25px 0 15px;
  }
  .tab {
    padding: 15px 0 25px;
  }
  .tab ul li {
    font-size: 18px;
    padding: 17px 0;
  }
  .news {
    padding: 0 0 50px;
  }
  .news .title {
    padding: 8.66vw 0 5.06vw;
  }
  .news ul {
    flex-wrap: wrap;
  }
  .news ul li {
    width: 100%;
  }
  .news ul li.text {
    padding-right: 0;
    padding-bottom: 30px;
  }
  .news ul li.text p {
    font-size: 16px;
    line-height: 1.6;
    padding-bottom: 20px;
  }
  .program,
  .vdi {
    padding-bottom: 50px;
  }
}
@media (max-width: 992px) {
  .main {
    padding-top: 80px;
  }
  .common-box .all-box {
    padding-top: 20px;
  }
  .common-box p {
    font-size: 14px;
    padding: 25px 0 15px;
  }
  .tab {
    padding: 15px 0 17px;
  }
  .tab ul li {
    font-size: 13px;
    padding: 5px 0;
  }
  .tab ul li span {
    display: block;
  }
  .news {
    padding: 0 0 6.66vw;
    background: url(../images/challenge/news-bg-m.jpg) center center no-repeat;
    background-size: cover;
  }
  .news .title {
    padding: 8.66vw 0 5.06vw;
  }
  .news ul {
    flex-direction: column-reverse;
  }
  .news ul li {
    width: 100%;
  }
  .news ul li.text {
    padding: 5.33vw 0 0;
  }
  .news ul li.text p {
    font-size: 3.2vw;
    line-height: 1.6;
    padding-bottom: 0;
  }
  .convoy {
    background: url(../images/challenge/convoy-bg-m.jpg) center center no-repeat;
    background-size: cover;
    height: 86.93vw;
    padding: 0 15px;
  }
  .convoy .convoy-box .title {
    padding-top: 6.4vw;
    padding-bottom: 0;
  }
  .convoy .convoy-box .title h2 {
    margin-bottom: 10px;
  }
  .convoy .convoy-box p {
    font-size: 3.2vw;
  }
  .convoy .convoy-box p span {
    display: inline;
  }
  .convoy .convoy-box .more-url {
    margin-top: 8px;
  }
  .common-box .all-box {
    display: block;
  }
  .common-box p {
    font-size: 3.2vw;
    text-align: left;
    padding: 35px 0 25px;
  }
  .common-box p span {
    display: inline;
  }
  .program {
    padding-bottom: 5.33vw;
    background: url(../images/challenge/program-bg-m.jpg) center center no-repeat;
    background-size: cover;
  }
  .program .program-box {
    padding-top: 0;
  }
  .program .program-box p {
    padding: 13px 0;
  }
  .vdi {
    padding-bottom: 5.33vw;
    background: url(../images/challenge/vdi-bg-m.jpg) center center no-repeat;
    background-size: cover;
  }
  .vdi .vdi-box {
    padding-top: 0;
  }
  .vdi .vdi-box p {
    padding: 20px 0 15px;
  }
}