.reserve {
  display: inline-block;
  color: #fff;
  background: #f1668d;
  padding: .55em .95em;
}

.research-hero {
  position: relative;
  min-height: 360px;
  overflow: hidden;
  background: #4a4042;
}

.research-hero > img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 48%;
}

.research-hero_overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(43, 33, 36, .82) 0%, rgba(43, 33, 36, .48) 48%, rgba(43, 33, 36, .12) 100%);
}

.research-hero_inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: 360px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 64px 32px;
  color: #fff;
}

.research-hero_inner p {
  margin-bottom: 10px;
  color: #f4b3c5;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .2em;
}

.research-hero_inner h2 {
  font-family: serif;
  font-size: clamp(36px, 5vw, 60px);
  font-weight: 500;
  letter-spacing: .08em;
  line-height: 1.2;
}

.research-hero_inner span {
  margin-top: 16px;
  font-size: 16px;
  letter-spacing: .08em;
}

.research-tabs {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  max-width: 900px;
  margin: 0 auto;
  border-right: 1px solid #ddd;
  border-left: 1px solid #ddd;
}

.research-tabs a {
  padding: 19px 12px;
  border-bottom: 1px solid #ddd;
  background: #f5f3f3;
  color: #333;
  font-size: 15px;
  font-weight: 500;
  text-align: center;
  text-decoration: none;
}

.research-tabs a + a {
  border-left: 1px solid #ddd;
}

.research-tabs a.is-current {
  border-bottom-color: #f1668d;
  background: #fff;
  color: #f1668d;
  box-shadow: inset 0 -3px 0 #f1668d;
}

.research-breadcrumb {
  display: flex;
  gap: 10px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 28px;
  color: #777;
  font-size: 13px;
}

.research-breadcrumb a {
  color: #777;
}

.research-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 36px 28px 110px;
}

.research-intro {
  max-width: 820px;
  margin-bottom: 56px;
}

.research-intro_en {
  margin-bottom: 8px;
  color: #f1668d;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .2em;
}

.research-intro h2 {
  position: relative;
  margin-bottom: 28px;
  padding-bottom: 20px;
  color: #333;
  font-size: clamp(30px, 4vw, 46px);
  font-weight: 500;
  letter-spacing: .06em;
}

.research-intro h2::after {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 56px;
  height: 4px;
  background: #f1668d;
  content: "";
}

.research-intro > p:last-child {
  color: #555;
  font-size: 16px;
  line-height: 1.9;
}

.research-layout {
  display: grid;
  grid-template-columns: 230px minmax(0, 1fr);
  gap: 56px;
  align-items: start;
}

.research-filter {
  position: sticky;
  top: 24px;
}

.research-filter_group + .research-filter_group {
  margin-top: 36px;
}

.research-filter h3 {
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 2px solid #333;
  color: #333;
  font-size: 15px;
  font-weight: 700;
}

.research-filter_buttons {
  display: grid;
  gap: 1px;
  background: #ddd;
  border: 1px solid #ddd;
}

.research-filter button {
  width: 100%;
  padding: 12px 14px;
  border: 0;
  background: #fff;
  color: #555;
  font: inherit;
  font-size: 14px;
  text-align: left;
  cursor: pointer;
  transition: background .2s ease, color .2s ease;
}

.research-filter button:hover,
.research-filter button:focus-visible {
  background: #fff3f6;
  color: #b94164;
}

.research-filter button.is-active {
  background: #f1668d;
  color: #fff;
  font-weight: 700;
}

.research-count {
  margin-bottom: 14px;
  color: #666;
  font-size: 14px;
  text-align: right;
}

.research-count strong {
  color: #333;
  font-size: 20px;
}

.research-list {
  border-top: 1px solid #d8d8d8;
}

.research-item {
  border-bottom: 1px solid #d8d8d8;
}

.research-item[hidden] {
  display: none;
}

.research-item > a {
  position: relative;
  display: block;
  padding: 28px 56px 28px 4px;
  color: #333;
  text-decoration: none;
  transition: background .2s ease, padding-left .2s ease;
}

.research-item > a::after {
  position: absolute;
  top: 50%;
  right: 12px;
  width: 12px;
  height: 12px;
  border-top: 2px solid #f1668d;
  border-right: 2px solid #f1668d;
  content: "";
  transform: translateY(-50%) rotate(45deg);
}

.research-item > a:hover,
.research-item > a:focus-visible {
  padding-left: 14px;
  background: #fff8fa;
}

.research-item_meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 11px;
}

.research-item_meta time {
  color: #777;
  font-size: 13px;
}

.research-item_meta span {
  display: inline-block;
  padding: 3px 10px;
  border: 1px solid #e6a3b6;
  border-radius: 20px;
  color: #b94164;
  font-size: 11px;
  font-weight: 700;
}

.research-item h3 {
  color: #333;
  font-size: 20px;
  font-weight: 500;
  line-height: 1.65;
}

.research-item p {
  margin-top: 8px;
  color: #777;
  font-size: 13px;
  line-height: 1.7;
}

.research-item_link {
  display: inline-block;
  margin-top: 12px;
  color: #b94164;
  font-size: 12px;
  font-weight: 700;
}

.research-empty {
  padding: 50px 20px;
  border-top: 1px solid #ddd;
  border-bottom: 1px solid #ddd;
  color: #777;
  text-align: center;
}

.research-note {
  margin-top: 72px;
  padding: 28px 32px;
  border-left: 4px solid #f1668d;
  background: #fff5f7;
}

.research-note h3 {
  margin-bottom: 10px;
  color: #333;
  font-size: 16px;
  font-weight: 700;
}

.research-note p {
  color: #666;
  font-size: 13px;
  line-height: 1.8;
}

@media (max-width: 767px) {
  .research-hero,
  .research-hero_inner {
    min-height: 280px;
  }

  .research-hero_overlay {
    background: linear-gradient(90deg, rgba(43, 33, 36, .78), rgba(43, 33, 36, .3));
  }

  .research-hero_inner {
    padding: 44px 22px;
  }

  .research-hero_inner span {
    font-size: 13px;
  }

  .research-tabs {
    grid-template-columns: 1fr;
  }

  .research-tabs a {
    padding: 13px 10px;
  }

  .research-tabs a + a {
    border-left: 0;
  }

  .research-breadcrumb {
    padding: 18px 20px;
  }

  .research-main {
    padding: 28px 20px 72px;
  }

  .research-intro {
    margin-bottom: 38px;
  }

  .research-intro > p:last-child {
    font-size: 14px;
  }

  .research-layout {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .research-filter {
    position: static;
  }

  .research-filter_buttons {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .research-filter button {
    text-align: center;
  }

  .research-item > a {
    padding: 24px 38px 24px 2px;
  }

  .research-item h3 {
    font-size: 17px;
  }

  .research-note {
    margin-top: 50px;
    padding: 22px 20px;
  }
}