.home-page {
  background:
    radial-gradient(circle at 8% 17%, rgba(172, 205, 187, .18), transparent 25rem),
    radial-gradient(circle at 92% 42%, rgba(126, 177, 202, .18), transparent 28rem),
    var(--paper);
}

.hero {
  position: relative;
  min-height: 650px;
  overflow: hidden;
  padding: clamp(68px, 8vw, 106px) 0 clamp(70px, 8vw, 102px);
  background: linear-gradient(130deg, rgba(250, 252, 250, .98), rgba(233, 242, 246, .94));
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(14, 46, 77, .22), transparent);
}

.hero-wash {
  position: absolute;
  border-radius: 50%;
  filter: blur(2px);
  pointer-events: none;
}

.hero-wash-one {
  width: 560px;
  height: 560px;
  top: -310px;
  left: -180px;
  background: rgba(172, 202, 177, .22);
}

.hero-wash-two {
  width: 470px;
  height: 470px;
  right: -180px;
  bottom: -260px;
  background: rgba(110, 164, 194, .2);
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, .95fr) minmax(420px, 1.05fr);
  align-items: center;
  gap: clamp(54px, 7vw, 96px);
}

.hero-copy { padding-left: clamp(0px, 2vw, 22px); }

.hero-society {
  margin: 0 0 24px;
  color: var(--navy-700);
  font-size: clamp(1.25rem, 1.8vw, 1.55rem);
  font-weight: 800;
  line-height: 1.6;
  letter-spacing: .06em;
}

.hero .eyebrow {
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: .14em;
}

.hero-eyebrow-row {
  display: flex;
  align-items: center;
  gap: 11px;
  margin: 0 0 24px;
}

.hero-eyebrow-row .eyebrow { margin: 0; }

.hero-eyebrow-logo {
  display: block;
  width: 56px;
  height: auto;
  flex: 0 0 auto;
  object-fit: contain;
}

.hero h1 {
  display: flex;
  align-items: baseline;
  gap: .16em;
  margin: 0;
  color: var(--navy-900);
  font-family: var(--font-serif);
  font-size: clamp(4.35rem, 8vw, 7.35rem);
  font-weight: 600;
  line-height: .98;
  letter-spacing: .05em;
}

.hero h1 small {
  color: var(--green-700);
  font-size: .36em;
  font-weight: 600;
}

.hero-subtitle {
  margin: 24px 0 0;
  color: var(--navy-700);
  font-family: var(--font-serif);
  font-size: clamp(1.25rem, 2.1vw, 1.72rem);
  font-weight: 700;
  letter-spacing: .15em;
  text-align: center;
}

.hero-subtitle-en {
  margin: 10px 0 0;
  color: var(--ink-soft);
  font-size: clamp(.92rem, 1.35vw, 1.08rem);
  font-weight: 650;
  line-height: 1.55;
  letter-spacing: .035em;
  text-align: center;
}

.hero-subtitle-en span { display: block; }

.hero-lead {
  margin: 28px 0 0;
  color: var(--ink-soft);
  font-size: 1rem;
  font-weight: 500;
  line-height: 2;
}

.hero-facts {
  margin: 31px 0 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.hero-facts div {
  display: grid;
  grid-template-columns: 68px 1fr;
  gap: 18px;
  padding: 13px 0;
}

.hero-facts div + div { border-top: 1px solid var(--line); }

.hero-facts dt {
  color: var(--green-700);
  font-size: .92rem;
  font-weight: 800;
}

.hero-facts dd {
  margin: 0;
  color: var(--ink);
  font-size: 1.06rem;
  font-weight: 700;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
  margin-top: 34px;
}

.hero-actions .button { min-width: 190px; }

.hero-visual {
  position: relative;
  padding: 0 30px 34px 0;
}

.venue-photo {
  position: relative;
  overflow: hidden;
  margin: 0;
  aspect-ratio: 4 / 5;
  background: #d7e3e7;
  border-radius: 48% 48% 30px 30px;
  box-shadow: 0 30px 68px rgba(7, 29, 49, .22);
}

.venue-photo::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 58%, rgba(7, 29, 49, .13));
}

.venue-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero-badge {
  position: absolute;
  right: 0;
  bottom: 0;
  display: grid;
  min-width: 170px;
  padding: 20px 22px;
  color: var(--white);
  background: var(--navy-900);
  border-radius: 50%;
  box-shadow: 0 18px 38px rgba(7, 29, 49, .24);
  text-align: center;
}

.hero-badge span {
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .16em;
}

.hero-badge strong {
  font-size: 1.34rem;
  letter-spacing: .05em;
}

.hero-badge small {
  color: var(--blue-300);
  font-size: .66rem;
  font-weight: 800;
  letter-spacing: .18em;
}

.home-shell {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 42px;
  align-items: stretch;
  padding-top: 64px;
  padding-bottom: 56px;
}

.home-sidebar { min-width: 0; }

.sidebar-sticky {
  position: sticky;
  top: calc(var(--header-height) + 24px);
  display: grid;
  gap: 20px;
}

.sidebar-card {
  padding: 24px;
  background: rgba(255, 255, 255, .94);
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: var(--shadow-soft);
}

.sidebar-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding-bottom: 13px;
  border-bottom: 1px solid var(--line);
}

.sidebar-heading h2 {
  margin: 0;
  color: var(--navy-900);
  font-family: var(--font-serif);
  font-size: 1.34rem;
  font-weight: 700;
}

.sidebar-heading span {
  color: var(--green-700);
  font-size: .68rem;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.news-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.news-list li {
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.news-list time {
  display: block;
  margin-bottom: 3px;
  color: var(--green-700);
  font-size: .8rem;
  font-weight: 800;
}

.news-list a {
  display: block;
  color: var(--ink);
  font-size: .92rem;
  font-weight: 650;
  line-height: 1.7;
}

.news-list a:hover {
  color: var(--navy-700);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.text-link {
  display: inline-flex;
  gap: 8px;
  margin-top: 17px;
  color: var(--navy-700);
  font-size: .84rem;
  font-weight: 800;
}

.news-mobile-archive { display: none; }

.news-more-arrow {
  display: inline-block;
  transition: transform .2s ease;
}

.social-card {
  padding: 24px 18px 20px;
  background: linear-gradient(145deg, rgba(255, 255, 255, .98), rgba(234, 243, 247, .96));
}

.sns-links {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.sns-link {
  display: block;
  width: 100%;
  padding: 0;
  overflow: visible;
  background: transparent;
  border: 0;
  border-radius: 0;
  box-shadow: none;
  transition: transform .2s ease, filter .2s ease;
}

.sns-link:hover {
  transform: translateY(-2px);
  filter: brightness(1.03) saturate(1.03);
}

.sns-banner-image {
  width: 100%;
  height: auto;
  object-fit: contain;
  border-radius: 0;
}

.home-main { min-width: 0; }

.poster-section { margin: 0 0 52px; }

.poster-section img {
  width: min(100%, 700px);
  height: auto;
  margin-inline: auto;
  background: var(--white);
  border-radius: 14px;
  box-shadow: 0 22px 52px rgba(9, 42, 68, .15);
}

.greeting-section {
  background: linear-gradient(135deg, rgba(255, 255, 255, .98), rgba(234, 243, 247, .94));
}

.greeting-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(220px, .65fr);
  gap: clamp(36px, 5vw, 64px);
  align-items: start;
}

.greeting-copy {
  grid-column: 1;
  color: var(--ink-soft);
  font-size: 1rem;
  line-height: 1.95;
}

.greeting-copy p {
  margin-top: 0;
  margin-bottom: 20px;
}

.president-photo {
  grid-column: 2;
  grid-row: 1;
  width: 100%;
  max-width: 320px;
  margin: 0 auto;
}

.president-photo img {
  width: 100%;
  height: auto;
  object-fit: contain;
  object-position: center top;
  border-radius: 18px;
  box-shadow: 0 16px 34px rgba(13, 42, 66, .13);
}

.lead-text {
  color: var(--navy-900);
  font-family: var(--font-serif);
  font-size: 1.24rem;
  font-weight: 700;
  line-height: 1.9;
}

.signature {
  margin-top: 30px !important;
  color: var(--navy-900);
  font-weight: 800;
  text-align: right;
}

.news-archive-wrap { padding-bottom: 90px; }

.news-archive-section {
  margin-bottom: 0;
  scroll-margin-top: calc(var(--header-height) + 28px);
}

.news-archive-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 28px;
}

.news-archive-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.news-archive-list li {
  display: grid;
  grid-template-columns: 125px minmax(0, 1fr);
  gap: 28px;
  align-items: baseline;
  padding: 20px 4px;
  border-bottom: 1px solid var(--line);
}

.news-archive-list time {
  color: var(--green-700);
  font-size: .82rem;
  font-weight: 800;
}

.news-archive-list a {
  display: block;
  color: var(--ink);
  font-size: .98rem;
  font-weight: 650;
  line-height: 1.7;
}

.news-archive-list a:hover {
  color: var(--navy-700);
  text-decoration: underline;
  text-underline-offset: 4px;
}

@media (max-width: 1120px) {
  .hero-grid {
    grid-template-columns: minmax(0, .9fr) minmax(360px, 1.1fr);
    gap: 46px;
  }

  .home-shell {
    grid-template-columns: 245px minmax(0, 1fr);
    gap: 30px;
  }
}

@media (max-width: 900px) {
  .hero {
    min-height: auto;
    padding-top: 62px;
  }

  .hero-grid { grid-template-columns: 1fr; }
  .hero-copy { max-width: 680px; }

  .hero-visual {
    width: min(100%, 620px);
    margin-inline: auto;
  }

  .venue-photo {
    aspect-ratio: 5 / 4;
    border-radius: 30px;
  }

  .home-shell { grid-template-columns: 1fr; }

  .sidebar-sticky {
    position: static;
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 720px) {
  .hero h1 { font-size: clamp(3.8rem, 18vw, 6rem); }
  .hero-subtitle { letter-spacing: .1em; }
  .hero-visual { padding: 0 14px 25px 0; }

  .hero-badge {
    min-width: 145px;
    padding: 16px 18px;
  }

  .sidebar-sticky { grid-template-columns: 1fr; }

  .news-mobile-enabled .news-archive-wrap { display: none; }

  .news-card.is-expanded .news-list { display: none; }

  .news-card.is-expanded .news-mobile-archive {
    display: block;
    margin-top: 4px;
  }

  .news-mobile-archive .news-archive-list {
    border-top: 0;
  }

  .news-mobile-archive .news-archive-list li {
    grid-template-columns: 1fr;
    gap: 4px;
    padding: 16px 0;
  }

  .news-mobile-archive .news-archive-list li:first-child {
    padding-top: 16px;
  }

  .news-mobile-enabled .news-more-arrow {
    transform: rotate(90deg);
  }

  .news-mobile-enabled .news-card.is-expanded .news-more-arrow {
    transform: rotate(-90deg);
  }

  .greeting-layout { grid-template-columns: 1fr; }

  .president-photo {
    grid-column: 1;
    grid-row: 1;
    width: min(100%, 240px);
  }

  .greeting-copy {
    grid-column: 1;
    grid-row: 2;
  }

  .news-archive-list li {
    grid-template-columns: 1fr;
    gap: 5px;
  }
}

@media (max-width: 520px) {
  .hero { padding: 46px 0 60px; }
  .hero-society { font-size: 1.08rem; }

  .hero .eyebrow {
    font-size: .9rem;
  }

  .hero-eyebrow-row {
    gap: 9px;
    margin-bottom: 20px;
  }

  .hero-eyebrow-logo { width: 44px; }

  .hero-subtitle-en {
    margin-top: 8px;
    font-size: .86rem;
    line-height: 1.55;
  }

  .hero h1 { font-size: clamp(3.3rem, 19vw, 5rem); }

  .hero-actions {
    display: grid;
    gap: 14px;
  }

  .hero-actions .button {
    width: 100%;
    min-width: 0;
  }

  .hero-facts div { grid-template-columns: 52px 1fr; }
  .venue-photo { aspect-ratio: 4 / 5; }

  .home-shell {
    padding-top: 42px;
    padding-bottom: 0;
  }

  .poster-section { margin-bottom: 32px; }
  .poster-section img { border-radius: 8px; }
  .lead-text { font-size: 1.1rem; }
  .news-archive-wrap { padding-bottom: 64px; }
}