/* B1 */
.box {
  margin: 0 auto;
}

/* B3 */
.tab__button {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  -ms-flex-wrap: wrap;
      flex-wrap: wrap;
  padding-top: 40px;
}
@media only screen and (max-width: 736px) {
  .tab__button__wrap {
    width: 100%;
    overflow-x: scroll;
    overflow-y: hidden;
  }
}
@media only screen and (max-width: 736px) {
  .tab__button {
    display: table;
    min-width: 100%;
    white-space: nowrap;
    padding-bottom: 0;
  }
}
.tab__button li {
  list-style-type: none;
  font-size: 1.125em;
  margin: 0 25px 0;
}
@media only screen and (max-width: 736px) {
  .tab__button li {
    display: table-cell;
    text-align: center;
  }
}
.tab__button li a {
  display: block;
  padding-bottom: 15px;
  color: #666;
  text-decoration: none;
}
.tab__button li a.active {
  padding-bottom: 15px;
  color: #c00;
  border-bottom: solid 4px #c00;
}
@media only screen and (max-width: 736px) {
  .tab__button li a.active {
    padding: 0 20px 15px;
    border-width: 2px;
  }
}
@media only screen and (min-width: 737px) {
  .tab__button li a:hover {
    color: #c00;
    border-bottom: solid 4px #c00;
  }
}
@media only screen and (max-width: 736px) {
  .tab__button li a {
    padding: 0 20px 15px;
    border-bottom: solid 2px #ebeced;
  }
}
.tab__contents .tab__child {
  display: none;
}
.tab__contents .tab__child.active {
  display: block;
  -webkit-animation-duration: 0.5s;
          animation-duration: 0.5s;
  -webkit-animation-name: fade-in;
          animation-name: fade-in;
}

@keyframes fade-in {
  0% {
    display: none;
    opacity: 0;
  }
  1% {
    display: block;
    opacity: 0;
  }
  100% {
    display: block;
    opacity: 1;
  }
}
@-webkit-keyframes fade-in {
  0% {
    display: none;
    opacity: 0;
  }
  1% {
    display: block;
    opacity: 0;
  }
  100% {
    display: block;
    opacity: 1;
  }
}
/* B4 */
.accordion__button {
  position: relative;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  padding-left: 30px;
  padding-right: 40px;
  margin: 0 auto;
  border: solid 1px #ebeced;
  min-height: 80px;
  color: #000;
}
.accordion__button::after {
  content: '';
  -webkit-transition: all .4s;
  transition: all .4s;
  content: "";
  display: block;
  position: absolute;
  width: 25px;
  height: 14px;
  top: 50%;
  margin-top: -7px;
  right: 20px;
  background: url(https://www.honda.com.cn/history/images/ico_filter_search.png) left top no-repeat;
}
.accordion__button.active::after {
  -webkit-transform: rotate(-180deg);
  transform: rotate(-180deg);
  -webkit-transition: all .4s;
  transition: all .4s;
}
@media only screen and (min-width: 737px) {
  .accordion__button {
    max-width: 1280px;
    text-decoration: none;
  }
}
@media only screen and (min-width: 737px) and (min-width: 737px) {
  .accordion__button:hover {
    text-decoration: underline;
  }
}

.accordion__contents {
  height: 0;
  overflow: hidden;
}
.accordion__contents.active {
  height: auto;
}

/* B5 */
@media only screen and (max-width: 736px) {
  .spmore {
    position: relative;
    height: 160px;
    overflow: hidden;
  }
  .spmore::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 40px;
    background: -webkit-gradient(linear, left top, left bottom, from(transparent), to(#fff));
    background: linear-gradient(transparent, #fff);
  }
  .spmore.active::after {
    display: none;
  }
  .spmore__btn {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-pack: center;
        -ms-flex-pack: center;
            justify-content: center;
    -webkit-box-align: center;
        -ms-flex-align: center;
            align-items: center;
    width: 42.2535211268%;
    height: 50px;
    margin: 25px auto;
    border: solid 1px #ccc;
    color: #666;
    text-decoration: none;
    border-radius: 5px;
  }
}