:root {
  --ink: #121416;
  --muted: #5f666d;
  --line: #dfe5e2;
  --paper: #fbfaf6;
  --white: #fff;
  --mint: #cdeee2;
  --mint-strong: #5cc0a4;
  --coral: #ef755f;
  --yellow: #f3c95e;
  --blue: #7bb6d9;
  --shadow: 0 22px 70px rgba(18, 20, 22, .12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Inter", "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  letter-spacing: 0;
  line-height: 1.9;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px 28px;
  border-bottom: 1px solid rgba(18, 20, 22, .08);
  background: rgba(251, 250, 246, .9);
  backdrop-filter: blur(18px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 260px;
}

.brand img {
  width: 300px;
  max-width: 34vw;
  height: auto;
  object-fit: contain;
}

.brand strong {
  font-size: 12px;
  line-height: 1.25;
  letter-spacing: .08em;
  color: var(--muted);
  white-space: nowrap;
}

.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 9px 14px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--white);
  font-weight: 900;
  cursor: pointer;
}

.mega-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
  align-items: center;
}

.mega-nav details {
  position: relative;
}

.mega-nav summary {
  list-style: none;
  padding: 8px 10px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  cursor: pointer;
  border: 1px solid transparent;
}

.mega-nav summary::-webkit-details-marker {
  display: none;
}

.mega-nav summary::after {
  content: "+";
  margin-left: 6px;
  color: var(--coral);
}

.mega-nav details[open] summary {
  color: var(--ink);
  border-color: var(--ink);
  background: var(--white);
}

.mega-nav details[open] summary::after {
  content: "-";
}

.mega-nav details > div {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  z-index: 40;
  width: min(420px, 88vw);
  padding: 10px;
  border: 1px solid var(--ink);
  background: rgba(255,255,255,.98);
  box-shadow: var(--shadow);
}

.mega-nav a {
  display: block;
  padding: 12px;
  color: var(--ink);
  border: 1px solid var(--line);
  background: var(--paper);
}

.mega-nav a + a {
  margin-top: 8px;
}

.mega-nav a span {
  display: inline-block;
  margin-bottom: 6px;
  color: var(--coral);
  font-size: 11px;
  font-weight: 900;
}

.mega-nav a strong {
  display: block;
  font-size: 13px;
  line-height: 1.45;
}

.mega-nav .clinic-link {
  padding: 9px 12px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--white);
  font-size: 12px;
  font-weight: 900;
}

.mega-nav a:hover {
  color: var(--ink);
  border-color: var(--coral);
}

.mega-nav .clinic-link:hover {
  color: var(--white);
  opacity: .8;
}

.mega-nav summary {
  padding: 8px 10px;
  font-size: 12px;
}
main {
  overflow: hidden;
}

.hero {
  position: relative;
  min-height: calc(100vh - 78px);
  display: grid;
  align-items: end;
  padding: 8vw 6vw 6vw;
  isolation: isolate;
}

.hero img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -2;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(251,250,246,.96), rgba(251,250,246,.76) 42%, rgba(251,250,246,.08));
  z-index: -1;
}

.hero-copy {
  max-width: 850px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--coral);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.15;
  letter-spacing: 0;
}

h1 {
  max-width: 980px;
  font-size: clamp(42px, 7vw, 98px);
  font-weight: 900;
}

h2 {
  font-size: clamp(28px, 4vw, 56px);
  font-weight: 900;
}

h3 {
  font-size: clamp(22px, 3vw, 38px);
}

.hero-copy p:not(.eyebrow),
.lead {
  max-width: 760px;
  margin: 24px 0 0;
  color: #293035;
  font-size: clamp(16px, 2vw, 21px);
  line-height: 1.9;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 18px;
  border: 1px solid var(--ink);
  font-weight: 800;
  transition: transform .2s ease, background .2s ease, color .2s ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button.primary {
  background: var(--ink);
  color: var(--white);
}

.button.ghost {
  background: rgba(255,255,255,.5);
}

.hero-actions,
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.pillar-intro,
.content-section,
.faq-section,
.related-grid,
.topics,
.lead-block,
.check-panel,
.cta-band {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.case-banner {
  width: min(1120px, calc(100% - 40px));
  margin: 20px auto 42px;
}

.case-banner a {
  position: relative;
  display: grid;
  min-height: 210px;
  overflow: hidden;
  border: 1px solid var(--ink);
  background: var(--ink);
}

.case-banner img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .88;
  transition: transform .25s ease, opacity .25s ease;
}

.case-banner div {
  position: relative;
  z-index: 1;
  align-self: center;
  width: min(680px, calc(100% - 48px));
  margin-left: 24px;
  padding: 22px;
  background: rgba(255,255,255,.82);
  backdrop-filter: blur(8px);
}

.case-banner span {
  display: inline-flex;
  margin-bottom: 10px;
  padding: 6px 10px;
  background: var(--ink);
  color: var(--white);
  font-size: 12px;
  font-weight: 900;
}

.case-banner strong {
  display: block;
  font-size: clamp(22px, 3vw, 34px);
  line-height: 1.25;
}

.case-banner small {
  display: block;
  margin-top: 8px;
  color: var(--muted);
}

.case-banner a:hover img {
  transform: scale(1.03);
  opacity: 1;
}

.pillar-intro {
  display: grid;
  grid-template-columns: minmax(220px, 360px) 1fr;
  gap: 40px;
  padding: 90px 0;
  border-bottom: 1px solid var(--line);
}

.pillar-intro p,
.content-section p,
.faq-section p,
.check-panel p,
.cta-band p {
  color: #31383d;
  font-size: 17px;
}

.method-grid {
  width: min(1240px, calc(100% - 40px));
  margin: 0 auto 60px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--ink);
  border-left: 1px solid var(--ink);
}

.method-grid article {
  min-height: 280px;
  padding: 28px;
  border-right: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  background: var(--white);
}

.visual-ribbon {
  width: min(1240px, calc(100% - 40px));
  margin: 0 auto 72px;
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 16px;
}

.visual-ribbon figure {
  margin: 0;
  border: 1px solid var(--ink);
  background: var(--white);
}

.visual-ribbon img {
  width: 100%;
  height: 360px;
  object-fit: cover;
}

.visual-ribbon figure:nth-child(2) img {
  height: 300px;
}

.visual-ribbon figcaption {
  padding: 14px 16px;
  color: var(--muted);
  font-size: 13px;
}

.method-grid span,
.topic-heading span {
  color: var(--coral);
  font-weight: 900;
}

.nico-gallery {
  width: min(1240px, calc(100% - 40px));
  margin: 0 auto 74px;
  display: grid;
  grid-template-columns: 1.1fr .95fr .95fr;
  gap: 16px;
  align-items: stretch;
}

.nico-gallery > div {
  grid-row: span 2;
  padding: 34px;
  border: 1px solid var(--ink);
  background: var(--white);
}

.nico-gallery > div h2 {
  font-size: clamp(32px, 4.6vw, 64px);
}

.nico-gallery > div p:not(.eyebrow) {
  margin-top: 22px;
  color: var(--muted);
  font-size: 16px;
}

.nico-gallery figure {
  margin: 0;
  border: 1px solid var(--ink);
  background: var(--white);
  overflow: hidden;
}

.nico-gallery figure.wide {
  grid-column: span 2;
}

.nico-gallery img {
  width: 100%;
  height: 250px;
  object-fit: cover;
}

.nico-gallery figure.wide img {
  height: 320px;
}

.nico-gallery figcaption {
  padding: 12px 14px;
  color: var(--muted);
  font-size: 13px;
}

.topics {
  padding: 70px 0;
}

.topic-band {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 28px;
  padding: 30px 0;
  border-top: 1px solid var(--line);
}

.topic-heading {
  position: sticky;
  top: 98px;
  align-self: start;
}

.cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.card {
  min-height: 190px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 16px;
  padding: 22px;
  border: 1px solid var(--ink);
  background: var(--white);
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  background: #f7fffb;
}

.card span {
  width: fit-content;
  padding: 4px 8px;
  background: var(--mint);
  font-size: 12px;
  font-weight: 800;
}

.card strong {
  font-size: 19px;
  line-height: 1.5;
}

.card small {
  color: var(--muted);
}

.lead-block {
  padding: 86px 0 40px;
}

.lead-block h1 {
  font-size: clamp(36px, 6vw, 78px);
}

.keyword-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 26px;
}

.keyword-row span {
  padding: 7px 10px;
  border: 1px solid var(--line);
  background: var(--white);
  font-size: 13px;
}

.check-panel {
  display: grid;
  grid-template-columns: 320px 1fr 150px;
  gap: 24px;
  align-items: start;
  margin-top: 30px;
  margin-bottom: 70px;
  padding: 28px;
  border: 1px solid var(--ink);
  background: var(--mint);
}

.check-panel form {
  display: grid;
  gap: 10px;
}

.check-panel label {
  display: grid;
  grid-template-columns: 22px 1fr;
  gap: 10px;
  padding: 12px;
  background: rgba(255,255,255,.62);
}

.check-panel input {
  width: 18px;
  height: 18px;
  accent-color: var(--coral);
}

.check-panel output {
  display: grid;
  place-items: center;
  min-height: 120px;
  border: 1px solid var(--ink);
  background: var(--white);
  text-align: center;
  font-weight: 900;
  line-height: 1.5;
  transition: background .2s ease, color .2s ease, transform .2s ease;
}

.check-panel output.is-yellow {
  background: #ffe58a;
  color: #3a2c00;
  transform: translateY(-2px);
}

.check-panel output.is-red {
  background: #dc3f34;
  color: var(--white);
  transform: translateY(-2px);
}

.check-panel output strong {
  display: block;
  padding: 4px 8px;
  font-size: 14px;
}

.check-panel output a {
  display: inline-flex;
  margin-top: 10px;
  padding: 8px 10px;
  border: 1px solid currentColor;
  background: rgba(255,255,255,.45);
  font-size: 12px;
  font-weight: 900;
}

.check-panel.is-yellow {
  background: #fff2b8;
}

.check-panel.is-red {
  background: #f7c9c4;
}

.content-section {
  padding: 48px 0;
  border-top: 1px solid var(--line);
}

.content-section h2 {
  max-width: 900px;
  margin-bottom: 24px;
}

.content-section p {
  max-width: 880px;
  margin: 0 0 18px;
}

.conclusion {
  padding-top: 64px;
}

.sibling-banner {
  width: min(1120px, calc(100% - 40px));
  margin: -38px auto 64px;
}

.sibling-banner a {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 18px;
  align-items: center;
  padding: 22px;
  border: 1px solid var(--ink);
  background: linear-gradient(135deg, var(--white), #eafbf3 55%, #fff1d0);
  box-shadow: 10px 10px 0 var(--ink);
}

.sibling-banner span {
  width: fit-content;
  padding: 7px 10px;
  background: var(--ink);
  color: var(--white);
  font-size: 12px;
  font-weight: 900;
}

.sibling-banner strong {
  display: block;
  font-size: clamp(22px, 3vw, 34px);
  line-height: 1.25;
}

.sibling-banner small {
  grid-column: 2;
  color: var(--muted);
  font-size: 14px;
}

.article-figure {
  width: min(1120px, calc(100% - 40px));
  margin: 34px auto 70px;
  border: 1px solid var(--ink);
  background: var(--white);
}

.article-figure img {
  width: 100%;
  aspect-ratio: 16 / 7;
  object-fit: cover;
}

.article-figure figcaption {
  padding: 14px 18px;
  color: var(--muted);
  font-size: 13px;
}

.faq-section {
  padding: 70px 0;
}

details {
  border-top: 1px solid var(--ink);
  background: rgba(255,255,255,.55);
}

details:last-child {
  border-bottom: 1px solid var(--ink);
}

summary {
  cursor: pointer;
  padding: 20px 0;
  font-weight: 900;
  font-size: 18px;
}

details p {
  max-width: 840px;
  margin: 0;
  padding: 0 0 24px;
}

.cta-band {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: center;
  margin-top: 30px;
  margin-bottom: 80px;
  padding: 34px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--white);
}

.cta-band p {
  color: rgba(255,255,255,.78);
}

.cta-band .eyebrow {
  color: var(--yellow);
}

.cta-band .button {
  border-color: var(--white);
}

.cta-band .primary {
  background: var(--white);
  color: var(--ink);
}

.related-grid {
  padding: 40px 0 80px;
}

.top-card {
  background: var(--yellow);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 30px;
  padding: 40px 28px;
  border-top: 1px solid var(--ink);
  background: var(--white);
}

.site-footer p {
  max-width: 760px;
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 900px) {
  .site-header {
    align-items: center;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 12px;
  }

  .brand {
    min-width: 0;
    flex: 1;
  }

  .brand img {
    width: 220px;
    max-width: 56vw;
  }

  .brand strong {
    display: none;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .mega-nav {
    display: none;
    width: 100%;
    max-height: calc(100vh - 88px);
    overflow: auto;
    justify-content: stretch;
    gap: 8px;
    padding: 10px;
    border: 1px solid var(--ink);
    background: rgba(255,255,255,.96);
    box-shadow: var(--shadow);
  }

  .site-header.is-menu-open .mega-nav {
    display: grid;
    grid-template-columns: 1fr;
  }

  .mega-nav details {
    position: static;
    border: 1px solid var(--line);
    background: var(--paper);
  }

  .mega-nav summary {
    padding: 14px;
    color: var(--ink);
    font-size: 15px;
    border: 0;
  }

  .mega-nav details[open] summary {
    border: 0;
    border-bottom: 1px solid var(--line);
  }

  .mega-nav details > div {
    position: static;
    width: 100%;
    padding: 10px;
    border: 0;
    background: var(--white);
    box-shadow: none;
  }

  .mega-nav .clinic-link {
    text-align: center;
  }

  .sibling-banner {
    margin: 24px auto 52px;
  }

  .sibling-banner a {
    grid-template-columns: 1fr;
    gap: 12px;
    padding: 18px;
    box-shadow: 6px 6px 0 var(--ink);
  }

  .sibling-banner span {
    width: fit-content;
  }

  .sibling-banner strong {
    font-size: 24px;
    line-height: 1.35;
    word-break: keep-all;
    overflow-wrap: anywhere;
  }

  .sibling-banner small {
    grid-column: auto;
    font-size: 14px;
    line-height: 1.7;
    word-break: keep-all;
    overflow-wrap: anywhere;
  }

  .card {
    min-height: 150px;
  }

  .card strong,
  .card small {
    word-break: keep-all;
    overflow-wrap: anywhere;
  }

  .check-panel output {
    min-height: 100px;
  }

  .check-panel output a {
    display: flex;
    justify-content: center;
    width: min(100%, 260px);
    margin-inline: auto;
    line-height: 1.45;
  }

  .hero {
    min-height: 720px;
  }

  .hero::after {
    background: linear-gradient(180deg, rgba(251,250,246,.98), rgba(251,250,246,.78), rgba(251,250,246,.26));
  }

  .pillar-intro,
  .topic-band,
  .check-panel,
  .cta-band {
    grid-template-columns: 1fr;
  }

  .method-grid,
  .visual-ribbon,
  .nico-gallery,
  .cards {
    grid-template-columns: 1fr;
  }

  .nico-gallery > div,
  .nico-gallery figure.wide {
    grid-column: auto;
    grid-row: auto;
  }

  .nico-gallery img,
  .nico-gallery figure.wide img {
    height: 260px;
  }

  .visual-ribbon img,
  .visual-ribbon figure:nth-child(2) img {
    height: 260px;
  }

  .topic-heading {
    position: static;
  }

  .site-footer {
    flex-direction: column;
  }
}

@media (max-width: 520px) {
  .site-header {
    padding: 14px 16px;
  }

  .pillar-intro,
  .content-section,
  .faq-section,
  .related-grid,
  .topics,
  .lead-block,
  .check-panel,
  .cta-band {
    width: min(100% - 28px, 1120px);
  }

  .hero {
    padding: 90px 18px 34px;
  }

  .button {
    width: 100%;
  }

  .article-figure {
    width: calc(100% - 28px);
  }

  .sibling-banner {
    width: calc(100% - 28px);
  }

  .sibling-banner a {
    padding: 16px;
  }

  .sibling-banner strong {
    font-size: 22px;
  }

  .case-banner div {
    width: calc(100% - 28px);
    margin: 14px;
    padding: 16px;
  }

  .case-banner strong {
    font-size: 22px;
  }
}