#relation-offer .headline {
  font-weight: 600;
  text-align: center;
}
#relation-offer .offer_list {
  display: flex;
}
@media screen and (min-width: 851px) {
  #relation-offer {
    padding: 60px 0;
  }
  #relation-offer .headline {
    margin: 0 auto 60px;
    font-size: 22px;
  }
  #relation-offer .offer_list {
    width: 730px;
    margin: 0 auto;
  }
}
@media screen and (max-width: 850px) {
  #relation-offer {
    padding: 40px 0;
  }
  #relation-offer .headline {
    margin: 0 auto 40px;
    font-size: 15px;
  }
  #relation-offer .offer_list {
    width: 100%;
    padding: 0 20px;
    box-sizing: border-box;
  }
}
@media screen and (max-width: 550px) {
  #relation-offer .offer_list {
    flex-wrap: wrap;
  }
}

/* item */
#relation-offer .item {
  flex: 1;
  position: relative;
}
#relation-offer .item .image_wrap {
  position: relative;
  overflow: hidden;
}
#relation-offer .item .image {
  padding-top: 100%;
  transition: transform 0.75s ease;
}
#relation-offer .item a:hover .image {
  transform: scale(1.2);
}
#relation-offer .item .category a {
  display: block;
  background: #fff;
  box-sizing: border-box;
  color: #000;
  font-size: .75rem;
  text-align: center;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 2;
  transition: all .2s;
}
#relation-offer .item .category a:hover {
  background: #efefef;
}
#relation-offer .item .title_area {
  margin-top: 15px;
}
#relation-offer .item .title {
  color: #000;
  font-weight: 500;
  line-height: 1.8;
}
#relation-offer .item .tags {
  margin-top: 10px;
  font-size: 0;
}
#relation-offer .item .form-list__submit {
  display: inline-block;
  margin: 5px 5px 0 0;
  padding: 5px 8px;
  background: #666;
  cursor: pointer;
  color: #fff;
  font-size: .75rem;
  transition: all .2s;
}
#relation-offer .item .form-list__submit:hover {
  background: #333;
}
#relation-offer .item .form-list__submit.sub {
  background: #eee;
  color: #000;
}
#relation-offer .item .form-list__submit.sub:hover {
  background: #ccc;
}
@media screen and (min-width: 851px) {
  #relation-offer .item + .item {
    margin-left: 2rem;
  }
  #relation-offer .item .category a {
    min-width: 120px;
    padding: .75rem 1.25rem;
    line-height: 1rem;
  }
  #relation-offer .item .title {
    font-size: 1rem;
  }
}
@media screen and (max-width: 850px) {
  #relation-offer .item + .item {
    margin-left: 1.25rem;
  }
  #relation-offer .item .category a {
    min-width: 100px;
    padding: .5rem 1.25rem;
    line-height: .875rem;
  }
  #relation-offer .item .title {
    font-size: .875rem;
  }
}
@media screen and (min-width: 451px) and (max-width: 550px) {
  #relation-offer .item {
    flex: none;
    width: -webkit-calc(50% - 10px);
    width: calc(50% - 10px);
  }
  #relation-offer .item:nth-of-type(2n - 1) {
    margin-left: 0;
  }
  #relation-offer .item:nth-of-type(n + 3) {
    margin-top: 20px;
  }
}
@media screen and (max-width: 450px) {
  #relation-offer .item {
    flex: none;
    width: 100%;
  }
  #relation-offer .item + .item {
    margin: 30px auto 0;
  }
  #relation-offer .item .image {
    padding-top: 60%;
  }
}