.main-1 .content {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}
.main-1 .item {
  box-shadow: 0px 10px 20px 0px rgba(199, 199, 199, 0.2);
}
.main-1 .item .img-auto {
  overflow: hidden;
}
.main-1 .item .img-auto::before {
  padding-top: calc(100% / 400 * 244);
}
.main-1 .item .img-auto .i {
  position: absolute;
  bottom: 0.7rem;
  right: 0.7rem;
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 50%;
  background-color: var(--color-c1);
}
.main-1 .item .img-auto .i img {
  width: 30%;
}
.main-1 .item .txt {
  padding: 1.5rem;
  background-color: #fff;
}
.main-1 .item .txt p {
  font-size: 1rem;
}
.main-1 .item:hover .img-auto > img {
  transform: scale(1.04);
}
.main-1 .item:hover .txt p {
  color: var(--color-c1);
}
.main-2 .content {
  display: flex;
  align-items: flex-start;
  gap: 3.3rem;
}
.main-2 .open .link i {
  transform: rotate(-180deg);
  color: var(--color-c1);
}
.main-2 .list {
  flex-shrink: 0;
  width: 24.2rem;
  padding: 2rem 2.5rem;
  background-color: #f6f3f4;
}
.main-2 .list .link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
  border-bottom: 1px solid var(--color-c1);
}
.main-2 .list .link span {
  font-size: 1.2rem;
}
.main-2 .list .submenu {
  padding: 1rem 0;
}
.main-2 .list .submenu a {
  display: block;
  font-size: 0.8rem;
  margin-bottom: 1rem;
  color: #666;
}
.main-2 .list .submenu a:hover,
.main-2 .list .submenu a.active {
  color: var(--color-c1);
}
.main-2 .con {
  flex: 1;
}
.main-2 .con li {
  margin-bottom: 0.5rem;
}
.main-2 .con .open .link i::before {
  transform: rotate(0deg);
  border-color: var(--color-c1);
}
.main-2 .con .link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem;
  background-color: #f7f7f7;
}
.main-2 .con .link span {
  font-size: 1.1rem;
  color: #666;
}
.main-2 .con .link i {
  position: relative;
  width: 0.9rem;
  border-bottom: 2px solid #333;
}
.main-2 .con .link i::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  border-bottom: 2px solid #333;
  transform: rotate(90deg);
  transform-origin: 50% 50%;
  transition: all ease 0.3s;
}
.main-2 .con .submenu {
  padding: 1rem 2rem;
  border-top: 1px solid #edebeb;
  background-color: #f7f7f7;
}
.main-2 .con .submenu,
.main-2 .con .submenu * {
  color: #666666;
  line-height: 1.8;
}
body.preview-open {
  overflow: hidden;
}
.image-preview {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.45);
  z-index: 9999;
  transition: none;
}
.image-preview .preview-panel {
  position: relative;
  width: 100vw;
  height: 100vh;
  padding: 2rem 6.8rem 4.3rem;
  background-color: #fff;
}
.image-preview .preview-title {
  position: relative;
  z-index: 2;
  font-size: 1.6rem;
}
.image-preview .preview-close {
  position: absolute;
  top: 2rem;
  right: 1.6rem;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.4rem;
  height: 2.4rem;
  padding: 0;
  border: 0;
  background-color: #999;
  cursor: pointer;
  z-index: 3;
}
.image-preview .preview-close i {
  color: #fff;
  font-size: 1.5rem;
  font-weight: normal;
}
.image-preview .preview-video {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: calc(100% - 2rem);
  margin-top: 1rem;
}
.image-preview .preview-video video {
  display: block;
  max-width: 100%;
  max-height: 100%;
  background-color: #000;
}
@media (max-width: 768px) {
  .image-preview .preview-panel {
    padding: 1.2rem 1rem 2rem;
  }
  .image-preview .preview-title {
    padding-right: 3rem;
    font-size: 1.1rem;
  }
  .image-preview .preview-close {
    top: 1rem;
    right: 0.8rem;
  }
  .main-1 .content {
    grid-template-columns: 1fr;
    gap: var(--padding);
  }
  .main-1 .item .txt {
    padding: 1rem;
  }
  .main-2 .content {
    flex-direction: column;
    gap: 1rem;
  }
  .main-2 .list {
    width: 100%;
    padding: 1rem;
  }
  .main-2 .list .link span {
    font-size: 1rem;
  }
  .main-2 .con {
    flex: none;
    width: 100%;
  }
  .main-2 .con .link span {
    font-size: 1rem;
  }
  .main-2 .con .submenu {
    padding: 1rem;
  }
}