html { scroll-behavior: smooth; }

body {
  background: var(--paper);
  color: var(--sumi);
}

.service-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  background: rgba(246, 241, 232, 0.9);
  border-bottom: 1px solid var(--line-soft);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.service-header__row {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 18px clamp(20px, 4vw, 48px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.service-header__brand img { width: 210px; display: block; }

.service-header__nav {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 13px;
  letter-spacing: 0.12em;
}

.service-header__nav a {
  color: var(--sumi-soft);
  text-decoration: none;
  border: 0;
}

.service-header__nav .home-link {
  padding: 13px 20px;
  border: 1px solid var(--line);
  color: var(--sumi);
}

.service-hero {
  position: relative;
  padding: clamp(150px, 16vw, 220px) 0 clamp(76px, 9vw, 128px);
  background: var(--paper-deep);
  overflow: hidden;
}

.service-hero::after {
  content: "";
  position: absolute;
  right: -16vw;
  bottom: -24vw;
  width: min(720px, 72vw);
  height: min(720px, 72vw);
  background: url('../../assets/motifs/annual-ring.svg') center/contain no-repeat;
  opacity: 0.16;
  pointer-events: none;
}

.service-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: clamp(48px, 8vw, 110px);
  align-items: end;
}

.service-eyebrow {
  font-family: var(--font-serif-en);
  font-size: 12px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--yakisugi);
  margin-bottom: 28px;
}

.service-title {
  font-family: var(--font-serif-jp);
  font-size: clamp(40px, 5vw, 72px);
  font-weight: 500;
  line-height: 1.45;
  letter-spacing: 0.1em;
  margin: 0;
}

.service-lead {
  color: var(--sumi-soft);
  font-size: clamp(15px, 1.25vw, 17px);
  line-height: 2.15;
  letter-spacing: 0.04em;
  margin: 0 0 36px;
}

.service-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.service-tag {
  display: inline-flex;
  padding: 8px 14px;
  border: 1px solid var(--line);
  color: var(--sumi-soft);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.service-anchor {
  background: var(--paper);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.service-anchor__row {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 18px clamp(20px, 4vw, 48px);
  display: flex;
  justify-content: center;
  gap: 28px;
  flex-wrap: wrap;
}

.service-anchor a {
  font-family: var(--font-serif-jp);
  color: var(--sumi-soft);
  text-decoration: none;
  border: 0;
  font-size: 13px;
  letter-spacing: 0.12em;
}

.service-section { padding: clamp(80px, 11vw, 150px) 0; }
.service-section--deep { background: var(--paper-deep); }

.service-section__head {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: clamp(36px, 6vw, 88px);
  align-items: start;
  margin-bottom: clamp(44px, 6vw, 76px);
}

.service-section h2 {
  font-family: var(--font-serif-jp);
  font-size: clamp(28px, 3vw, 42px);
  font-weight: 500;
  line-height: 1.55;
  letter-spacing: 0.08em;
  margin: 0;
}

.service-section__head p {
  color: var(--sumi-soft);
  line-height: 2;
  margin: 0;
}

.service-problem {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.service-problem--single {
  grid-template-columns: 1fr;
}

.service-problem__panel {
  background: var(--paper-light);
  padding: clamp(30px, 5vw, 56px);
}

.service-problem__panel h3 {
  font-family: var(--font-serif-jp);
  font-size: 21px;
  font-weight: 500;
  letter-spacing: 0.08em;
  line-height: 1.6;
  margin: 0 0 22px;
}

.service-problem__panel ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.service-problem__panel li {
  position: relative;
  padding: 12px 0 12px 18px;
  color: var(--sumi-soft);
  line-height: 1.9;
  border-bottom: 1px solid var(--line-soft);
}

.service-problem__panel li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 27px;
  width: 8px;
  height: 1px;
  background: var(--sugi);
}

.service-reason {
  margin-top: 0;
  padding: clamp(30px, 5vw, 56px);
  border: 1px solid var(--line);
  background: var(--paper);
}

.service-reason h3 {
  font-family: var(--font-serif-jp);
  font-size: clamp(22px, 2.4vw, 32px);
  font-weight: 500;
  line-height: 1.65;
  letter-spacing: 0.08em;
  margin: 0 0 18px;
}

.service-reason p {
  max-width: 46em;
  color: var(--sumi-soft);
  line-height: 2;
  margin: 0;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.service-card {
  background: var(--paper-light);
  padding: clamp(30px, 4vw, 52px);
  min-height: 260px;
}

.service-card .num {
  display: block;
  font-family: var(--font-serif-en);
  font-style: italic;
  font-size: 22px;
  letter-spacing: 0.22em;
  color: var(--yakisugi);
  margin-bottom: 28px;
}

.service-card h3 {
  font-family: var(--font-serif-jp);
  font-size: 21px;
  font-weight: 500;
  line-height: 1.6;
  letter-spacing: 0.08em;
  margin: 0 0 18px;
}

.service-card p {
  color: var(--sumi-soft);
  font-size: 14px;
  line-height: 2;
  margin: 0;
}

.service-point {
  display: grid;
  grid-template-columns: 0.52fr 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin-top: clamp(36px, 5vw, 64px);
}

.service-point + .service-point { margin-top: 28px; }

.service-point__label {
  background: var(--paper-deep);
  padding: clamp(32px, 5vw, 58px);
}

.service-point__label .point {
  display: block;
  font-family: var(--font-serif-en);
  font-size: 12px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--yakisugi);
  margin-bottom: 26px;
}

.service-point__label h3 {
  font-family: var(--font-serif-jp);
  font-size: clamp(24px, 2.8vw, 36px);
  font-weight: 500;
  line-height: 1.55;
  letter-spacing: 0.08em;
  margin: 0;
}

.service-point__body {
  background: var(--paper-light);
  padding: clamp(32px, 5vw, 58px);
}

.service-point__body p {
  color: var(--sumi-soft);
  line-height: 2;
  margin: 0 0 22px;
}

.service-point__body ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 28px;
}

.service-point__body li {
  position: relative;
  padding: 12px 0 12px 18px;
  color: var(--sumi-soft);
  font-size: 14px;
  line-height: 1.9;
  border-bottom: 1px solid var(--line-soft);
}

.service-point__body li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 27px;
  width: 8px;
  height: 1px;
  background: var(--sugi);
}

.service-flow {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.service-flow__item {
  background: var(--paper);
  padding: clamp(28px, 4vw, 44px);
}

.service-flow__item .step {
  font-family: var(--font-serif-en);
  font-size: 12px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--yakisugi);
}

.service-flow__item h3 {
  font-family: var(--font-serif-jp);
  font-size: 18px;
  font-weight: 500;
  letter-spacing: 0.08em;
  margin: 24px 0 14px;
}

.service-flow__item p {
  color: var(--sumi-soft);
  font-size: 13px;
  line-height: 1.9;
  margin: 0;
}

.service-note {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.service-note__panel {
  background: var(--paper-light);
  padding: clamp(32px, 5vw, 60px);
}

.service-note__panel h3 {
  font-family: var(--font-serif-jp);
  font-size: 22px;
  font-weight: 500;
  letter-spacing: 0.08em;
  margin: 0 0 18px;
}

.service-note__panel p,
.service-note__panel li {
  color: var(--sumi-soft);
  font-size: 14px;
  line-height: 2;
}

.service-note__panel ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.service-note__panel li {
  position: relative;
  padding: 10px 0 10px 18px;
  border-bottom: 1px solid var(--line-soft);
}

.service-note__panel li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 25px;
  width: 8px;
  height: 1px;
  background: var(--sugi);
}

.service-faq {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.service-faq__item {
  background: var(--paper-light);
  padding: clamp(26px, 4vw, 42px);
}

.service-faq__item summary {
  font-family: var(--font-serif-jp);
  font-size: 18px;
  font-weight: 500;
  line-height: 1.7;
  letter-spacing: 0.06em;
  margin: 0;
  cursor: pointer;
  list-style: none;
  color: var(--sumi);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.service-faq__item summary::-webkit-details-marker { display: none; }

.service-faq__item summary::after {
  content: "+";
  font-family: var(--font-serif-en);
  font-size: 24px;
  line-height: 1;
  color: var(--yakisugi);
  flex: 0 0 auto;
}

.service-faq__item[open] summary::after {
  content: "−";
}

.service-faq__item p {
  color: var(--sumi-soft);
  font-size: 14px;
  line-height: 2;
  margin: 16px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line-soft);
}

.service-cta {
  background: var(--yakisugi);
  color: var(--paper);
  text-align: center;
  padding: clamp(72px, 10vw, 120px) 0;
}

.service-cta h2 {
  color: var(--paper);
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 400;
  letter-spacing: 0.1em;
  margin: 0 0 20px;
}

.service-cta p {
  color: var(--hinoki-soft);
  line-height: 2;
  margin: 0 auto 40px;
  max-width: 34em;
}

.service-actions {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

.service-button {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  padding: 18px 30px;
  border: 1px solid var(--paper);
  background: var(--paper);
  color: var(--sumi);
  text-decoration: none;
  letter-spacing: 0.1em;
  font-size: 14px;
}

.service-button--ghost {
  background: transparent;
  color: var(--paper);
  border-color: var(--hinoki);
}

.service-footer {
  background: var(--sumi);
  color: var(--line-soft);
  padding: 42px 0;
  font-size: 12px;
  letter-spacing: 0.08em;
}

.service-footer__row {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.service-footer a {
  color: var(--line-soft);
  text-decoration: none;
  border: 0;
}

@media (max-width: 920px) {
  .service-header__nav { display: none; }
  .service-header__brand img { width: 180px; }
  .service-hero__grid,
  .service-section__head,
  .service-problem,
  .service-point,
  .service-note { grid-template-columns: 1fr; }
  .service-grid { grid-template-columns: 1fr; }
  .service-flow { grid-template-columns: 1fr; }
  .service-point__body ul { grid-template-columns: 1fr; }
}