.papers-head {
  text-align: center;
  padding-bottom: 70px;
}

.papers-head__lead {
  font-size: 1.8rem;
  line-height: 2.1;
  margin: 33px 0 0;
}

.article-detail .papers-head {
  padding-bottom: 15px;
}

.article-detail .papers-head .papers-tab {
  margin-bottom: 0;
}

.papers-tab {
  -webkit-box-shadow: 5px 5px 30px 0 rgba(0, 0, 0, 0.2);
          box-shadow: 5px 5px 30px 0 rgba(0, 0, 0, 0.2);
  margin: -30px 0 65px;
}

.papers-tab__list {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: justify;
      -ms-flex-pack: justify;
          justify-content: space-between;
}

.papers-tab__list li {
  -webkit-box-flex: 1;
      -ms-flex: 1;
          flex: 1;
}

.papers-tab__list li a {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  height: 82px;
  text-align: center;
  line-height: 1.4;
  color: #fff;
  position: relative;
}

.papers-tab__list li a::before {
  content: "";
  display: block;
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  background: #000;
  opacity: 0.5;
  -webkit-transition: opacity 0.3s;
  transition: opacity 0.3s;
}

.papers-tab__list li a:hover {
  opacity: 1;
}

.papers-tab__list li a:hover::before {
  opacity: 0;
}

.papers-tab__list li.is-active a::before {
  display: none;
}

.papers-tab__list li.is-current a::before {
  display: none;
}

.papers-tab__list li.is-current a::after {
  content: "";
  display: block;
  width: 8px;
  height: 8px;
  border-bottom: solid 1px #fff;
  border-right: solid 1px #fff;
  -webkit-transform: rotate(45deg);
          transform: rotate(45deg);
  position: absolute;
  bottom: 10px;
  left: 0;
  right: 0;
  margin: auto;
}

.papers-tab__list li.-all a {
  background: #fff;
  color: #333;
}

.papers-tab__list li.-opinion a {
  background-color: #162a89;
}

.papers-tab__list li.-reports a {
  background-color: #c8a226;
}

.papers-tab__list li.-vision a {
  background-color: #8eb66e;
}

.papers-tab__list li.-note a {
  background-color: #4882af;
}

.papers-tab__list li.-paper a {
  background-color: #cf664c;
}

.papers-tab__list li.-data a {
  background-color: #b63d3d;
}

.papers-tab__list li.-others a {
  background-color: #582929;
}

.papers-headline {
  display: inline-block;
  padding: 0 0 0 81px;
  position: relative;
  line-height: 1.6;
}

.papers-headline i {
  position: absolute;
  left: 0;
  top: -16px;
  width: 61px;
  height: 61px;
}

.papers-headline i img {
  width: 100%;
  height: 100%;
}

.papers-headline .-jp {
  font-size: 1.6rem;
  letter-spacing: 0.04em;
  margin-bottom: 10px;
}

.papers-headline .-en {
  letter-spacing: 0.2em;
  font-size: 3.4rem;
  font-weight: 500;
  line-height: 1.0;
}

.papers-headline.-all {
  padding: 0;
}

.papers-main {
  padding: 50px 0 80px;
  position: relative;
}

.papers-main .articles__select {
  margin-top: -5px;
  margin-bottom: 30px;
  position: relative;
  z-index: 1;
}

.papers-main .articles__pagenation:nth-child(2) {
  margin: 0 0 30px;
  position: absolute;
  width: 100%;
  top: 50px;
  left: 0;
  right: 0;
}

.papers-main .article-box {
  clear: both;
}

.papers-main.-opinion {
  background: -webkit-gradient(linear, left top, right top, from(#eff6fd), to(#d2e4f6));
  background: linear-gradient(to right, #eff6fd 0%, #d2e4f6 100%);
}

.papers-main.-vision {
  background: -webkit-gradient(linear, left top, right top, from(#ecf5e5), to(#d1ebbd));
  background: linear-gradient(to right, #ecf5e5 0%, #d1ebbd 100%);
}

.papers-main.-reports {
  background: -webkit-gradient(linear, left top, right top, from(#fcfbe8), to(#f9f6bf));
  background: linear-gradient(to right, #fcfbe8 0%, #f9f6bf 100%);
}

.papers-main.-note {
  background: -webkit-gradient(linear, left top, right top, from(#e7f8fb), to(#d2eff6));
  background: linear-gradient(to right, #e7f8fb 0%, #d2eff6 100%);
}

.papers-main.-paper {
  background: -webkit-gradient(linear, left top, right top, from(#fef6eb), to(#f6d9bd));
  background: linear-gradient(to right, #fef6eb 0%, #f6d9bd 100%);
}

.papers-main.-data {
  background: -webkit-gradient(linear, left top, right top, from(#faeaea), to(#fcd4d4));
  background: linear-gradient(to right, #faeaea 0%, #fcd4d4 100%);
}

.papers-main.-others {
  background: -webkit-gradient(linear, left top, right top, from(#f6ecec), to(#e7cdc9));
  background: linear-gradient(to right, #f6ecec 0%, #e7cdc9 100%);
}

@media only screen and (max-width: 768px) {
  .papers-head {
    padding-bottom: 23px;
  }
  .papers-head__lead {
    text-align: left;
    font-size: 1.6rem;
    line-height: 1.9375;
    margin: 24px 0 0;
  }
  .papers-tab {
    margin: 0 -15px 38px;
    overflow: auto;
    position: relative;
    z-index: 1;
  }
  .papers-tab__list {
    -webkit-box-pack: start;
        -ms-flex-pack: start;
            justify-content: flex-start;
    white-space: nowrap;
  }
  .papers-tab__list li {
    -webkit-box-flex: 0;
        -ms-flex: none;
            flex: none;
    -ms-flex-negative: 0;
        flex-shrink: 0;
    z-index: 0;
  }
  .papers-tab__list li a {
    height: 60px;
    padding: 0 15px 2px;
  }
  .papers-tab__list li.is-current a::after {
    display: none;
  }
  .papers-tab__list li.-all {
    width: 75px;
  }
  .papers-tab__list li.-all a {
    font-weight: 700;
  }
  .papers-headline .-jp {
    font-size: 1.4rem;
  }
  .papers-headline .-en {
    font-size: 3.0rem;
  }
  .papers-headline {
    padding: 0 0 0 50px;
  }
  .papers-headline i {
    top: -12px;
    width: 40.5px;
    height: 40.5px;
  }
  .papers-headline .-en {
    display: none;
  }
  .papers-headline .-jp {
    font-size: 2.0rem;
    font-weight: 700;
    line-height: 1.0;
  }
  .papers-headline.-all .-en {
    display: block;
  }
  .papers-main {
    padding: 30px 0 80px;
  }
  .papers-main .c-column {
    margin: 0;
  }
  .papers-main .articles__select {
    margin: 0 15px;
    float: none;
  }
  .papers-main .articles__select + .articles__pagenation {
    margin-top: 25px;
  }
  .papers-main .articles__pagenation:nth-child(2) {
    position: static;
  }
}