.bg-img {
  opacity: 0;
  width: 100%;
  max-width: 100%;
  min-width: 1200px;
}

header {
  position: relative;
  text-align: center;
  height: 720px;
}
header .head {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
}
header .head .img {
  display: inline-block;
}
header .content {
  height: 100%;
}
header h1 {
  position: absolute;
  top: 34px;
  left: 0;
}
header h1 img {
  height: 42px;
}
header h1 .img2 {
  display: none;
}
header .img {
  display: inline-block;
  vertical-align: top;
}
header .t {
  font-size: 20px;
  color: #fff;
  line-height: 20px;
  padding: 22px 0 0 10px;
  display: inline-block;
  vertical-align: top;
}
header .banner-text {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: #fff;
}
header .banner-text .t1 {
  font-size: 80px;
  line-height: 112px;
}
header .banner-text .t2 {
  font-size: 80px;
  line-height: 112px;
}

.video-warp .tit {
  display: none;
}

.nav {
  position: absolute;
  top: 22px;
  right: 0;
  font-size: 24px;
  line-height: 34px;
  z-index: 2;
}
.nav ul {
  display: flex;
}
.nav li {
  padding: 0 40px;
}
.nav a {
  color: #fff;
  position: relative;
  transition: all 0.3s ease;
}
.nav a::before {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 24px;
  width: 0;
  height: 8px;
  background-color: #FFDE02;
  transition: all 0.3s ease;
  transform: translateX(-50%);
  z-index: -1;
}
.nav a:hover {
  color: #fff;
}
.nav a:hover::before {
  width: 100%;
}

.case-warp {
  padding-top: 80px;
}

.case-list ul {
  display: flex;
  flex-wrap: wrap;
  gap: 60px;
}
.case-list ul li {
  width: calc((100% - 120px) / 3);
}
.case-list .case-box {
  overflow: hidden;
  width: 100%;
  height: 100%;
  display: flex;
  position: relative;
  color: #000;
}
.case-list .case-box img {
  width: 100%;
}
.case-list .case-box .tit {
  position: absolute;
  left: 30px;
  bottom: 40px;
}
.case-list .case-box .tit span {
  display: inline-block;
  position: relative;
}
.case-list .case-box .tit span::after {
  position: absolute;
  left: 0;
  width: 0;
  bottom: -4px;
  content: "";
  height: 8px;
  background-color: #FFDE02;
  transition: all 0.5s;
}
.case-list .case-box .name {
  font-size: 28px;
  line-height: 40px;
}
.case-list .case-box .desc {
  font-size: 24px;
  line-height: 32px;
}
.case-list .case-box:hover img {
  transform: scale(1.1);
  transition: all 0.5s;
}
.case-list .case-box:hover .tit span::after {
  width: 100%;
}

.case-more {
  text-align: center;
  padding: 90px 0 100px 0;
}
.case-more a {
  border: 1px #979797 solid;
  width: 180px;
  height: 50px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: #333;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}
.case-more a::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: #979797;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.3s ease;
  z-index: -1;
}
.case-more a:hover {
  color: #fff;
  border-color: #979797;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}
.case-more a:hover::before {
  transform: scaleX(1);
  transform-origin: left;
}

.customer-warp {
  padding-bottom: 105px;
}
.customer-warp .title {
  text-align: center;
  font-size: 32px;
  line-height: 46px;
  color: #000;
  font-weight: bold;
  padding-bottom: 40px;
}
.customer-warp .customer-list ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0px;
}
.customer-warp .customer-list ul li {
  width: 25%;
  text-align: center;
}
.customer-warp .customer-list img {
  width: 80%;
}
.customer-warp .customer-list img:hover {
  transform: translateY(-10px);
  transition: all 0.5s;
}

footer {
  background-color: #000;
}

.footer-logo {
  padding: 40px 0 110px 0;
}

.footer-info {
  display: flex;
  justify-content: space-between;
}
.footer-info .t1 {
  font-size: 24px;
  line-height: 48px;
  color: #fff;
}
.footer-info .r span {
  padding-left: 30px;
}
.footer-info .r span img {
  width: 30px;
}

.cp {
  padding: 40px 0 100px 0;
  font-size: 16px;
  color: #9a9a9a;
}

@media screen and (max-width: 750px) {
  header h1 {
    left: 50px;
    z-index: 9;
  }
  header h1 .img {
    display: inline-block;
  }
  .menu {
    position: absolute;
    top: 38px;
    right: 30px;
    width: 50px;
    height: 50px;
    z-index: 9;
  }
  .menu::before {
    content: "";
    position: absolute;
    left: 8px;
    right: 8px;
    top: 15px;
    height: 3px;
    background-color: #fff;
    transition: all 0.3s ease;
  }
  .menu::after {
    content: "";
    position: absolute;
    left: 8px;
    right: 8px;
    top: 35px;
    height: 3px;
    background-color: #fff;
    transition: all 0.3s ease;
  }
  .menu i {
    position: absolute;
    left: 10px;
    right: 10px;
    top: 25px;
    height: 3px;
    background-color: #fff;
    pointer-events: none;
  }
  .menu.close::before {
    transform: rotate(45deg);
    top: 25px;
    background-color: #1a1a1a;
  }
  .menu.close::after {
    transform: rotate(-45deg);
    top: 25px;
    background-color: #1a1a1a;
  }
  .menu.close i {
    display: none;
  }
  .video-warp {
    position: relative;
  }
  .video-warp {
    position: relative;
    padding-bottom: 70px;
  }
  .video-warp .tit {
    position: absolute;
    left: 0;
    bottom: 0;
    right: 0;
    font-size: 32px;
    padding-top: 40px;
    height: 90px;
    color: #000;
    text-align: center;
    background-color: #fff;
    border-radius: 20px 20px 0 0;
    display: block;
  }
  .video {
    height: auto;
    width: 100%;
  }
  header {
    height: auto;
  }
  header h1 .img2 {
    display: none;
  }
  header .open .img {
    display: none;
  }
  header .open .img2 {
    display: inline-block;
  }
  header .open .t {
    color: #000;
  }
  .nav {
    display: none;
  }
  .nav.open {
    display: block;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgb(255, 255, 255);
    padding: 100px 0 0 10px;
  }
  .nav.open ul {
    flex-direction: column;
  }
  .nav.open ul li {
    text-align: left;
    font-size: 36px;
  }
  .nav.open ul a {
    display: block;
    color: #000;
    padding: 31px 0;
  }
  .case-warp {
    padding-top: 10px;
  }
  .case-list {
    padding: 0 15px;
  }
  .case-list ul {
    gap: 60px;
    justify-content: space-between;
  }
  .case-list ul li {
    width: calc(50% - 30px);
  }
  .customer-warp .customer-list ul li {
    width: 33%;
  }
}