@layer page {
  /* Entrance-first home page added after the base home stylesheet. */
  .home-page {
    --home-teal: #0f766e;
    --home-teal-deep: #0a4f4a;
    --home-teal-soft: #edf8f6;
  }

  .home-page .hc-hero {
    padding: 72px 0 0;
    border-bottom: 0;
    background:
      radial-gradient(circle at 12% 10%, rgba(94, 234, 212, 0.12), transparent 28%),
      linear-gradient(135deg, #071a31 0%, #10385b 58%, #0f5e68 100%);
  }

  .hc-hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(330px, 0.72fr);
    gap: clamp(36px, 6vw, 76px);
    align-items: center;
  }

  .hc-hero-copy {
    padding-bottom: 56px;
  }

  .home-page .hc-hero h1 {
    max-width: 760px;
    font-size: clamp(2.35rem, 5.1vw, 4.25rem);
    letter-spacing: -0.03em;
  }

  .home-page .hc-hero .hc-lead {
    max-width: 760px;
    font-size: clamp(1.02rem, 1.6vw, 1.2rem);
  }

  .hc-hero-note {
    margin: 16px 0 0;
    font-size: 0.84rem;
  }

  .hc-quick-check {
    border-top: 5px solid var(--home-gold);
    border-radius: 0 0 18px 18px;
    background: #fff;
    padding: 28px;
    box-shadow: 0 22px 50px rgba(1, 15, 30, 0.24);
    color: var(--home-ink);
  }

  .home-page .hc-quick-check p,
  .home-page .hc-quick-check h2 {
    color: inherit;
  }

  .home-page .hc-quick-check .hc-quick-label {
    margin: 0 0 7px;
    color: #8a6500;
    font-size: 0.73rem;
    font-weight: 900;
    letter-spacing: 0.12em;
  }

  .home-page .hc-quick-check h2 {
    margin: 0 0 18px;
    font-family: "Noto Serif JP", serif;
    font-size: clamp(1.35rem, 2vw, 1.72rem);
    line-height: 1.5;
  }

  .hc-quick-check ul {
    display: grid;
    gap: 10px;
    margin: 0 0 22px;
    padding: 0;
    list-style: none;
  }

  .hc-quick-check li {
    position: relative;
    padding: 11px 12px 11px 40px;
    border: 1px solid #dce7ea;
    border-radius: 10px;
    background: #f8fbfb;
    font-size: 0.91rem;
    font-weight: 700;
    line-height: 1.55;
  }

  .hc-quick-check li::before {
    content: "?";
    position: absolute;
    top: 50%;
    left: 12px;
    display: grid;
    width: 20px;
    height: 20px;
    place-items: center;
    border-radius: 50%;
    background: var(--home-teal);
    color: #fff;
    font-size: 0.76rem;
    transform: translateY(-50%);
  }

  .home-page .hc-quick-check > a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-radius: 10px;
    background: var(--home-teal);
    padding: 14px 16px;
    color: #fff;
    font-weight: 900;
    text-decoration: none;
  }

  .home-page .hc-quick-check > p {
    margin: 12px 0 0;
    text-align: center;
    font-size: 0.8rem;
  }

  .hc-quick-check > p a {
    color: #315b67;
    text-underline-offset: 0.16em;
  }

  .hc-term-strip {
    padding: 0;
  }

  .hc-term-strip dl {
    display: grid;
    grid-template-columns: 1fr 1fr;
    margin: 0;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    background: rgba(3, 18, 33, 0.34);
  }

  .hc-term-strip dl > div {
    display: grid;
    grid-template-columns: 118px 1fr;
    gap: 16px;
    align-items: center;
    padding: 22px 28px;
  }

  .hc-term-strip dl > div + div {
    border-left: 1px solid rgba(255, 255, 255, 0.18);
  }

  .hc-term-strip dt {
    color: #f6d56b;
    font-weight: 900;
  }

  .hc-term-strip dd {
    margin: 0;
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.9rem;
    line-height: 1.7;
  }

  .home-page .hc-section {
    padding: 78px 0;
  }

  .home-page .hc-audience {
    background: #f6f9fb;
  }

  .hc-card-grid-three {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .home-page .hc-card-grid-three .hc-card {
    min-height: 260px;
    padding: 30px;
  }

  .home-page .hc-card-grid-three .hc-card h3 {
    margin-top: 18px;
    font-size: 1.28rem;
  }

  .home-page .hc-card-grid-three .hc-card p {
    flex: 1;
    font-size: 0.96rem;
  }

  .home-page .hc-card-grid-three .hc-card {
    display: flex;
    flex-direction: column;
  }

  .hc-research-link {
    margin: 24px 0 0;
    text-align: right;
  }

  .hc-research-link a {
    color: #315b67;
    font-weight: 800;
    text-underline-offset: 0.2em;
  }

  .hc-core {
    background: #fff;
  }

  .hc-core-head {
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.7fr);
    gap: 48px;
    align-items: end;
  }

  .home-page .hc-core-head h2 {
    margin-bottom: 0;
  }

  .hc-core-head > p {
    margin: 0 0 4px;
    color: var(--home-muted);
    line-height: 1.9;
  }

  .hc-core-conclusion {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 18px;
    align-items: center;
    margin: 34px 0 30px;
    border: 1px solid #b9d9d5;
    border-left: 6px solid var(--home-teal);
    border-radius: 0 14px 14px 0;
    background: var(--home-teal-soft);
    padding: 20px 22px;
  }

  .hc-core-conclusion > span {
    border-radius: 999px;
    background: var(--home-teal-deep);
    padding: 5px 11px;
    color: #fff;
    font-size: 0.75rem;
    font-weight: 900;
  }

  .hc-core-conclusion p {
    margin: 0;
    color: #193f3b;
    font-size: 1.03rem;
    line-height: 1.8;
  }

  .hc-logic-line {
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 22px;
    margin: 0;
    padding: 0;
    list-style: none;
  }

  .hc-logic-line li {
    position: relative;
    display: grid;
    min-height: 112px;
    place-content: center;
    gap: 5px;
    border: 1px solid #c8dbdf;
    border-radius: 14px;
    background: #fbfdfd;
    padding: 16px 10px;
    text-align: center;
  }

  .hc-logic-line li:not(:last-child)::after {
    content: "→";
    position: absolute;
    top: 50%;
    right: -19px;
    z-index: 2;
    color: #83999d;
    font-weight: 900;
    transform: translateY(-50%);
  }

  .hc-logic-line small {
    color: #9a7208;
    font-weight: 900;
  }

  .hc-logic-line strong {
    color: #173d43;
    font-size: 0.94rem;
    line-height: 1.5;
  }

  .hc-core-foot {
    display: flex;
    flex-wrap: wrap;
    gap: 14px 28px;
    align-items: center;
    margin-top: 28px;
    padding-top: 24px;
    border-top: 1px solid var(--home-line);
  }

  .hc-core-foot > div {
    display: flex;
    gap: 9px;
    align-items: center;
  }

  .hc-core-foot p {
    margin: 0;
    color: var(--home-muted);
    font-size: 0.83rem;
  }

  .hc-source-badge {
    display: inline-flex;
    align-items: center;
    width: fit-content;
    border-radius: 999px;
    padding: 5px 10px;
    font-size: 0.72rem;
    font-weight: 900;
    line-height: 1.2;
  }

  .hc-source-badge--primary {
    background: #fff3c6;
    color: #755600;
  }

  .hc-source-badge--analysis {
    background: #dff4f0;
    color: #0a5b55;
  }

  .home-page .hc-core-link {
    margin-left: auto;
    border-radius: 999px;
    background: var(--home-navy);
    padding: 12px 18px;
    color: #fff;
    font-weight: 900;
    text-decoration: none;
  }

  .hc-evidence {
    background: #f7f4ec;
  }

  .hc-evidence-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }

  .hc-evidence-card {
    border: 1px solid #ded8c9;
    border-top: 5px solid #c59a26;
    border-radius: 14px;
    background: #fff;
    padding: 28px;
  }

  .hc-evidence-card--analysis {
    border-top-color: var(--home-teal);
  }

  .hc-evidence-card h3 {
    margin: 16px 0 14px;
    color: var(--home-navy);
    font-family: "Noto Serif JP", serif;
    font-size: 1.28rem;
  }

  .hc-evidence-card ul {
    display: grid;
    gap: 8px;
    margin: 0 0 22px;
    padding-left: 1.2em;
    color: #475569;
    line-height: 1.7;
  }

  .hc-evidence-links {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
  }

  .hc-evidence-links a {
    border: 1px solid #cfd9dd;
    border-radius: 999px;
    padding: 8px 12px;
    color: #174f5c;
    font-size: 0.84rem;
    font-weight: 900;
    text-decoration: none;
  }

  .hc-archive-feature {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 34px;
    align-items: center;
    margin-top: 22px;
    border-radius: 16px;
    background: var(--home-navy-deep);
    padding: 32px;
    color: #fff;
  }

  .hc-archive-kicker {
    margin: 0 0 6px;
    color: #f3cf5c;
    font-size: 0.74rem;
    font-weight: 900;
    letter-spacing: 0.12em;
  }

  .hc-archive-feature h3 {
    margin: 0 0 9px;
    color: #fff;
    font-family: "Noto Serif JP", serif;
    font-size: 1.35rem;
  }

  .hc-archive-feature p:last-child {
    max-width: 760px;
    margin: 0;
    color: rgba(255, 255, 255, 0.82);
    line-height: 1.8;
  }

  .hc-archive-actions {
    display: grid;
    gap: 10px;
  }

  .hc-archive-actions a {
    border: 1px solid rgba(255, 255, 255, 0.28);
    border-radius: 9px;
    background: rgba(255, 255, 255, 0.09);
    padding: 11px 14px;
    color: #fff;
    font-size: 0.86rem;
    font-weight: 900;
    text-align: center;
    text-decoration: none;
  }

  .hc-issues {
    background: #fff;
  }

  .hc-research-base {
    background: var(--home-navy);
    color: #fff;
  }

  .hc-research-base .hc-kicker {
    color: var(--home-gold-light);
  }

  .home-page .hc-research-base h2 {
    color: #fff;
  }

  .home-page .hc-research-base .hc-section-lead {
    color: rgba(255, 255, 255, 0.76);
  }

  .hc-research-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .hc-research-grid > a {
    border: 1px solid rgba(255, 255, 255, 0.19);
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.08);
    padding: 26px;
    color: #fff;
    text-decoration: none;
  }

  .hc-research-grid strong {
    display: block;
    color: var(--home-gold-light);
    font-family: "Noto Serif JP", serif;
    font-size: 1.8rem;
  }

  .hc-research-grid span {
    display: block;
    margin-top: 3px;
    font-size: 0.75rem;
    font-weight: 900;
    letter-spacing: 0.08em;
  }

  .hc-research-grid p {
    margin: 14px 0 0;
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
    line-height: 1.75;
  }

  .hc-tools {
    background: #fff;
  }

  .hc-updates {
    background: #f6f9fb;
  }

  @media (max-width: 1020px) {
    .hc-hero-grid,
    .hc-core-head {
      grid-template-columns: 1fr;
    }

    .hc-quick-check {
      margin-bottom: 42px;
    }

    .hc-term-strip dl {
      grid-template-columns: 1fr;
    }

    .hc-term-strip dl > div + div {
      border-top: 1px solid rgba(255, 255, 255, 0.18);
      border-left: 0;
    }

    .hc-card-grid-three {
      grid-template-columns: 1fr 1fr;
    }

    .hc-card-grid-three .hc-card:last-child {
      grid-column: 1 / -1;
    }

    .hc-logic-line {
      grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .hc-logic-line li:nth-child(3)::after {
      display: none;
    }

    .hc-archive-feature {
      grid-template-columns: 1fr;
    }

    .hc-archive-actions {
      grid-template-columns: 1fr 1fr;
    }
  }

  @media (max-width: 680px) {
    .home-page .hc-hero {
      padding-top: 48px;
    }

    .hc-hero-copy {
      padding-bottom: 16px;
    }

    .hc-quick-check {
      padding: 22px 18px;
    }

    .hc-term-strip dl > div {
      grid-template-columns: 1fr;
      gap: 3px;
      padding: 17px 19px;
    }

    .home-page .hc-section {
      padding: 54px 0;
    }

    .hc-card-grid-three,
    .hc-evidence-grid,
    .hc-research-grid {
      grid-template-columns: 1fr;
    }

    .hc-card-grid-three .hc-card:last-child {
      grid-column: auto;
    }

    .home-page .hc-card-grid-three .hc-card {
      min-height: 0;
      padding: 24px 21px;
    }

    .hc-research-link {
      text-align: left;
    }

    .hc-core-conclusion {
      grid-template-columns: 1fr;
    }

    .hc-logic-line {
      grid-template-columns: 1fr;
      gap: 28px;
    }

    .hc-logic-line li {
      min-height: 88px;
    }

    .hc-logic-line li:not(:last-child)::after {
      top: auto;
      right: 50%;
      bottom: -25px;
      content: "↓";
      transform: translateX(50%);
    }

    .hc-core-foot {
      align-items: stretch;
    }

    .hc-core-foot > div {
      width: 100%;
      align-items: flex-start;
    }

    .home-page .hc-core-link {
      width: 100%;
      margin-left: 0;
      text-align: center;
    }

    .hc-evidence-card,
    .hc-archive-feature {
      padding: 23px 20px;
    }

    .hc-archive-actions {
      grid-template-columns: 1fr;
    }
  }
}