*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --c-navy: #1e3247;
  --c-text: #2b3a4a;
  --c-muted: #55677a;
  --c-sky: #eaf3fa;
  --c-pale: #f4f8fb;
  --c-accent: #4f81a9;
  --c-line: rgba(30, 50, 71, 0.12);
  --c-white: #ffffff;
  --ease-out: cubic-bezier(0.22, 0.61, 0.36, 1);
  --font-serif: "Shippori Mincho", "Noto Serif JP", serif;
  --font-sans: "Noto Sans JP", sans-serif;
  --gutter: clamp(1rem, 3vw, 2.5rem);
  --header-h: clamp(4.25rem, 7vw, 5.5rem);
  --tile-gap: clamp(0.375rem, 0.7vw, 0.625rem);
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
}

body {
  font-family: var(--font-sans);
  color: var(--c-text);
  background: var(--c-white);
  -webkit-font-smoothing: antialiased;
}

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

ul {
  list-style: none;
}

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

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--c-white);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  height: var(--header-h);
  padding-inline: var(--gutter);
  transition: box-shadow 0.3s var(--ease-out);
}

.site-header.is-scrolled {
  box-shadow: 0 6px 20px rgba(30, 50, 71, 0.08);
}

.logo {
  display: inline-flex;
  width: fit-content;
  max-width: 244px;
  line-height: 0;
}

.logo__img {
  display: block;
  width: min(244px, 100%);
  height: auto;
  object-fit: contain;
  /* 素材の背景が白（非透過）のため */
  mix-blend-mode: multiply;
}

.global-nav {
  display: flex;
  align-items: center;
  gap: clamp(1.5rem, 3vw, 2.75rem);
}

.global-nav__links {
  display: flex;
  gap: clamp(1.25rem, 2.6vw, 2.5rem);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--c-navy);
}

.global-nav__links a {
  position: relative;
  padding-block: 0.25rem;
}

.global-nav__links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.35s ease;
}

.global-nav__links a:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.sns-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.sns-link svg {
  width: 0.85em;
  height: 0.85em;
  flex-shrink: 0;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: square;
  stroke-linejoin: miter;
}

@media (min-width: 861px) {
  .global-nav__links {
    align-items: center;
  }

  .global-nav__cta a {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.75rem 1.5rem;
    border-radius: 999px;
    background: var(--c-navy);
    color: var(--c-white);
    transition:
      background-color 0.3s ease,
      transform 0.3s ease,
      box-shadow 0.3s ease;
  }

  .global-nav__cta a::after {
    display: none;
  }

  .global-nav__cta a:hover {
    background: #2c4560;
    transform: translateY(-1px);
    box-shadow: 0 8px 20px rgba(30, 50, 71, 0.2);
  }
}

.menu-btn {
  position: relative;
  z-index: 2;
  display: none;
  place-content: center;
  gap: 8px;
  width: 2.875rem;
  height: 2.875rem;
  border: 0;
  background: none;
  cursor: pointer;
}

.menu-btn__line {
  display: block;
  width: 1.75rem;
  height: 1px;
  background: #101820;
  transition: transform 0.35s var(--ease-out);
}

.site-header.is-open .menu-btn__line:nth-child(1) {
  transform: translateY(4.75px) rotate(45deg);
}

.site-header.is-open .menu-btn__line:nth-child(2) {
  transform: translateY(-4.75px) rotate(-45deg);
}

/* ---------- Hero ---------- */

.hero {
  width: 100%;
  max-width: 1920px;
  margin-inline: auto;
  padding: 0 var(--gutter) var(--gutter);
}

.hero__grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  grid-template-rows: repeat(6, minmax(0, 1fr));
  grid-template-areas:
    "sea    sea    sea    sea    sea    dining dining dining dining leaf   leaf   leaf"
    "sea    sea    sea    sea    sea    dining dining dining dining leaf   leaf   leaf"
    "house  house  house  house  text   text   text   text   text   street street street"
    "house  house  house  house  text   text   text   text   text   street street street"
    "living living living living text   text   text   text   text   street street street"
    "living living living living bridge bridge bridge bridge bridge bridge bridge bridge";
  gap: var(--tile-gap);
  height: calc(100svh - var(--header-h) - var(--gutter));
  min-height: 560px;
  max-height: 900px;
}

.hero__tile {
  position: relative;
  overflow: hidden;
  border-radius: 2px;
  background: var(--c-sky);
  animation: tile-reveal 1.1s cubic-bezier(0.22, 0.61, 0.36, 1) both;
  animation-delay: calc(var(--i) * 0.08s);
}

.hero__tile img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 1.2s cubic-bezier(0.22, 0.61, 0.36, 1);
}

.hero__tile:hover img {
  transform: scale(1.04);
}

.hero__tile--sea {
  grid-area: sea;
}

.hero__tile--sea img {
  object-position: 45% 70%;
}

.hero__tile--dining {
  grid-area: dining;
}

.hero__tile--dining img {
  object-position: 50% 55%;
}

.hero__tile--leaf {
  grid-area: leaf;
}

.hero__tile--leaf img {
  object-position: 75% 50%;
}

.hero__tile--house {
  grid-area: house;
}

.hero__tile--house img {
  object-position: 60% 40%;
}

.hero__tile--living {
  grid-area: living;
}

.hero__tile--living img {
  object-position: 65% 50%;
}

.hero__tile--street {
  grid-area: street;
}

.hero__tile--bridge {
  grid-area: bridge;
}

.hero__tile--bridge img {
  object-position: 50% 52%;
}

.hero__content {
  grid-area: text;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  text-align: center;
  color: var(--c-navy);
}

.hero__title {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(1.5rem, 2.6vw, 2.5rem);
  line-height: 1.6;
  letter-spacing: 0.12em;
}

.hero__title-line {
  display: block;
}

.hero__lead {
  margin-top: clamp(1.5rem, 2.4vw, 2.25rem);
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(1.3125rem, 1.65vw, 1.5rem);
  line-height: 2;
  letter-spacing: 0.14em;
  color: var(--c-muted);
}

@keyframes tile-reveal {
  from {
    opacity: 0;
    clip-path: inset(0 0 100% 0);
  }
  to {
    opacity: 1;
    clip-path: inset(0 0 0 0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .hero__tile {
    animation: none;
  }

  .hero__tile img {
    transition: none;
  }
}

/* ---------- Responsive ---------- */

@media (max-width: 860px) {
  /* ページトップボタン(z-index: 20)より前面に出す */
  .site-header.is-open {
    z-index: 30;
  }

  .site-header .logo {
    position: relative;
    z-index: 2;
  }

  .site-header .logo__img {
    width: min(244px, 78vw);
    height: auto;
  }

  .global-nav__links {
    position: fixed;
    inset: 0;
    z-index: 1;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2.25rem;
    background: var(--c-white);
    font-family: var(--font-serif);
    font-size: 1.25rem;
    letter-spacing: 0.16em;
    opacity: 0;
    visibility: hidden;
    transition:
      opacity 0.4s var(--ease-out),
      visibility 0.4s;
  }

  .site-header.is-open .global-nav__links {
    opacity: 1;
    visibility: visible;
  }

  .global-nav__links li {
    transform: translateY(12px);
    transition: transform 0.5s var(--ease-out);
  }

  .site-header.is-open .global-nav__links li {
    transform: none;
  }

  .menu-btn {
    display: grid;
  }

  .hero__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    grid-template-rows: 38vw 30vw auto 34vw;
    grid-template-areas:
      "sea    sea"
      "dining leaf"
      "text   text"
      "house  street";
    height: auto;
    min-height: 0;
    max-height: none;
  }

  .hero__tile--living,
  .hero__tile--bridge {
    display: none;
  }

  .hero__content {
    padding: 1.25rem 1rem;
  }

  .hero__title {
    font-size: clamp(1.5rem, 6.4vw, 2rem);
    letter-spacing: 0.08em;
  }
}

/* ---------- Common ---------- */

.container {
  width: min(100% - var(--gutter) * 2, 1000px);
  margin-inline: auto;
}

.container--narrow {
  width: min(100% - var(--gutter) * 2, 820px);
}

section:not(.hero) {
  padding-block: clamp(5rem, 10vw, 8.5rem);
}

.section-label {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.28em;
  color: var(--c-accent);
}

.section-label--light {
  color: rgba(255, 255, 255, 0.8);
}

.section-head {
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
  text-align: center;
}

.section-title {
  margin-top: 0.875rem;
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(1.5rem, 2.6vw, 2.125rem);
  line-height: 1.5;
  letter-spacing: 0.12em;
  color: var(--c-navy);
}

.section-head .section-title::after {
  content: "";
  display: block;
  width: 2rem;
  height: 1px;
  margin: 1.5rem auto 0;
  background: var(--c-navy);
  opacity: 0.4;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding-bottom: 0.375rem;
  border-bottom: 1px solid currentColor;
  font-size: 0.875rem;
  letter-spacing: 0.08em;
  color: var(--c-navy);
  transition: gap 0.3s var(--ease-out);
}

.text-link:hover {
  gap: 1.125rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 1.25rem;
  min-width: 17rem;
  padding: 1.125rem 2.25rem;
  border-radius: 999px;
  background: var(--c-white);
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--c-navy);
  transition:
    transform 0.3s var(--ease-out),
    box-shadow 0.3s var(--ease-out);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(10, 25, 40, 0.25);
}

.btn__arrow {
  transition: transform 0.3s var(--ease-out);
}

.btn:hover .btn__arrow {
  transform: translateX(4px);
}

.sp-only {
  display: none;
}

.js .reveal {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 1s var(--ease-out),
    transform 1s var(--ease-out);
}

.js .reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- Message ---------- */

.message__inner {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  gap: clamp(3rem, 6vw, 5.5rem);
}

.message__title {
  writing-mode: vertical-rl;
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: clamp(1.75rem, 2.6vw, 2.25rem);
  line-height: 1.5;
  letter-spacing: 0.14em;
  color: var(--c-navy);
}

.message__body {
  padding-top: 0.25rem;
  font-size: 1rem;
  line-height: 2.2;
  letter-spacing: 0.06em;
  color: var(--c-text);
}

.message__body p + p {
  margin-top: 1.25em;
}

.message__follow {
  display: flex;
  justify-content: center;
  margin-top: clamp(3rem, 6vw, 4.5rem);
}

.follow-btn {
  position: relative;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  width: min(100%, 34rem);
  padding: 1.25rem 2rem 1.25rem 1.25rem;
  border: 1px solid var(--c-navy);
  border-radius: 999px;
  overflow: hidden;
  isolation: isolate;
  color: var(--c-navy);
  transition: color 0.5s var(--ease-out);
}

.follow-btn::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: var(--c-navy);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.5s var(--ease-out);
}

.follow-btn:hover {
  color: var(--c-white);
}

.follow-btn:hover::before {
  transform: scaleX(1);
  transform-origin: left;
}

.follow-btn__icon {
  display: grid;
  place-content: center;
  flex-shrink: 0;
  width: 3.75rem;
  height: 3.75rem;
  border-radius: 50%;
  background: linear-gradient(45deg, #f9ce34 0%, #ee2a7b 50%, #6228d7 100%);
  color: var(--c-white);
}

.follow-btn__icon svg {
  width: 2.625rem;
  height: 2.625rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
}

.follow-btn__dot {
  fill: currentColor;
  stroke: none;
}

.follow-btn__text {
  display: grid;
  gap: 0.35rem;
  flex: 1;
}

.follow-btn__label {
  font-family: var(--font-serif);
  font-size: clamp(0.9375rem, 1.6vw, 1.125rem);
  font-weight: 500;
  letter-spacing: 0.14em;
}

.follow-btn__id {
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  opacity: 0.7;
}

.follow-btn__arrow svg {
  display: block;
  width: 1.75rem;
  height: 0.875rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.2;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform 0.5s var(--ease-out);
}

.follow-btn:hover .follow-btn__arrow svg {
  transform: translateX(6px);
}

/* ---------- Service ---------- */

.service {
  background: var(--c-pale);
}

.service__list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(0.5rem, 1vw, 0.875rem);
}

.service-tile {
  position: relative;
  aspect-ratio: 3 / 4;
  overflow: hidden;
  border-radius: 2px;
  background: var(--c-navy);
  color: var(--c-white);
}

.service-tile:nth-child(2) {
  transition-delay: 0.08s;
}

.service-tile:nth-child(3) {
  transition-delay: 0.16s;
}

.service-tile:nth-child(4) {
  transition-delay: 0.24s;
}

.service-tile:nth-child(5) {
  transition-delay: 0.32s;
}

.service-tile:nth-child(6) {
  transition-delay: 0.4s;
}

.service-tile__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 1.2s var(--ease-out);
}

/* 写真の上でも白文字が読めるよう下側を暗くする */
.service-tile::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(18, 34, 50, 0) 20%,
    rgba(18, 34, 50, 0.55) 52%,
    rgba(18, 34, 50, 0.88) 100%
  );
  transition: opacity 0.6s var(--ease-out);
}

.service-tile__body {
  position: absolute;
  inset: auto 0 0;
  z-index: 1;
  padding: clamp(1rem, 1.7vw, 1.5rem);
}

.service-tile__num {
  display: block;
  font-size: 0.6875rem;
  letter-spacing: 0.2em;
  opacity: 0.85;
}

.service-tile__title {
  margin-top: 0.5rem;
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(1.125rem, 1.5vw, 1.5rem);
  letter-spacing: 0.08em;
}

.service-tile__text {
  margin-top: 0.75rem;
  font-size: 0.8125rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.88);
  transition: transform 0.6s var(--ease-out);
}

.service-tile:hover .service-tile__img {
  transform: scale(1.06);
}

.service-tile:hover .service-tile__text {
  transform: translateY(-4px);
}

/* ---------- Expertise ---------- */

.expertise__list {
  display: grid;
  gap: clamp(1.25rem, 2.5vw, 2rem);
  max-width: 1000px;
  margin-inline: auto;
}

.case {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 3fr);
  gap: clamp(1.75rem, 4vw, 3.5rem);
  align-items: center;
  padding: clamp(1.5rem, 3vw, 2.5rem);
  border: 1px solid var(--c-line);
  border-radius: 2px;
  background: var(--c-white);
}

.case__visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 1;
  overflow: hidden;
  border-radius: 2px;
  background: linear-gradient(150deg, #eef4f9 0%, #d9e6f1 100%);
}

.case__kanji {
  display: flex;
  align-items: center;
  justify-content: center;
  padding-inline: 0.5rem;
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(1.375rem, 2.4vw, 2rem);
  line-height: 1.3;
  letter-spacing: 0.12em;
  color: var(--c-navy);
  opacity: 0.85;
  text-align: center;
}

.case__en {
  position: absolute;
  right: 0.75rem;
  bottom: 0.625rem;
  font-size: 0.5625rem;
  letter-spacing: 0.2em;
  color: var(--c-accent);
}

.case__question {
  margin-top: 0;
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(1.25rem, 2.1vw, 1.625rem);
  line-height: 1.7;
  letter-spacing: 0.06em;
  color: var(--c-navy);
  word-break: auto-phrase;
}

.case__answer {
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--c-line);
  font-size: 0.9375rem;
  line-height: 2;
  letter-spacing: 0.03em;
}

.case__answer-label {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  margin-bottom: 0.5rem;
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--c-navy);
}

.case__answer-label::before {
  content: "";
  width: 1.25rem;
  height: 1px;
  background: currentColor;
}

/* ---------- Company ---------- */

.company,
.office {
  background: var(--c-pale);
}

.company__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 3fr);
  gap: clamp(2rem, 5vw, 5rem);
}

.company__head .section-title {
  margin-top: 0.875rem;
}

.company__table {
  border-top: 1px solid var(--c-navy);
}

.company__row {
  display: grid;
  grid-template-columns: 9rem minmax(0, 1fr);
  gap: 1.5rem;
  padding-block: 1.5rem;
  border-bottom: 1px solid var(--c-line);
  font-size: 0.9375rem;
  line-height: 1.9;
}

.company__row dt {
  font-weight: 500;
  color: var(--c-navy);
}

/* ---------- Office ---------- */

.office {
  padding-top: 0 !important;
}

.office__block {
  border-radius: 2px;
  overflow: hidden;
  background: var(--c-white);
}

.office__top {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
}

.office-card {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 1.25rem;
  padding: clamp(2rem, 4vw, 3.5rem);
}

.office-card__title {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 1.375rem;
  letter-spacing: 0.12em;
  color: var(--c-navy);
}

.office-card__address,
.office-card__tel {
  font-size: 0.9375rem;
  line-height: 1.9;
}

.office-card .text-link {
  align-self: flex-start;
  margin-top: 0.5rem;
}

.office__photo {
  overflow: hidden;
  min-height: 360px;
  background: var(--c-sky);
}

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

.office__map {
  width: 100%;
  height: 360px;
}

.office__map iframe {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
  filter: grayscale(0.35);
}

/* ---------- Contact ---------- */

.contact {
  position: relative;
  overflow: hidden;
  color: var(--c-white);
  text-align: center;
  background: var(--c-navy);
}

.contact__bg {
  position: absolute;
  inset: 0;
}

.contact__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.28;
}

.contact__inner {
  position: relative;
}

.contact__title {
  margin-top: 1rem;
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(1.625rem, 3vw, 2.375rem);
  letter-spacing: 0.12em;
}

.contact__text {
  margin-block: 1.75rem 2.5rem;
  font-size: 0.9375rem;
  line-height: 2;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.88);
}

.contact__note {
  margin-top: 1.75rem;
  font-size: 0.75rem;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.7);
}

.contact__note a {
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- Privacy ---------- */

section.privacy {
  padding-block: clamp(3.5rem, 6vw, 5rem);
}

.privacy__details {
  border-block: 1px solid var(--c-line);
}

.privacy__details summary {
  position: relative;
  padding: 1.5rem 2.5rem 1.5rem 0;
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 1.0625rem;
  letter-spacing: 0.1em;
  color: var(--c-navy);
  cursor: pointer;
  list-style: none;
}

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

.privacy__details summary::before,
.privacy__details summary::after {
  content: "";
  position: absolute;
  top: 50%;
  right: 0.5rem;
  width: 0.875rem;
  height: 1px;
  background: currentColor;
  transition: transform 0.3s var(--ease-out);
}

.privacy__details summary::after {
  transform: rotate(90deg);
}

.privacy__details[open] summary::after {
  transform: rotate(0deg);
}

.privacy__body {
  padding-bottom: 2rem;
  font-size: 0.875rem;
  line-height: 2;
}

.privacy__body ol {
  margin-block: 1.25rem;
  padding-left: 1.5em;
}

.privacy__body li + li {
  margin-top: 0.75rem;
}

.privacy__body strong {
  display: block;
  font-weight: 500;
  color: var(--c-navy);
}

.privacy__date {
  text-align: right;
  color: var(--c-muted);
}

/* ---------- Footer ---------- */

.footer {
  padding-top: clamp(2.5rem, 4vw, 3rem);
  padding-bottom: 1.5rem;
  background: var(--c-pale);
  color: var(--c-navy);
}

.footer__main {
  display: flex;
  align-items: center;
  gap: 2rem clamp(2rem, 5vw, 3.5rem);
  padding-bottom: 1.75rem;
  border-bottom: 1px solid var(--c-line);
}

.footer__brand {
  display: grid;
  gap: 0.6rem;
  flex-shrink: 0;
  transition: opacity 0.3s ease;
}

.footer__brand:hover {
  opacity: 0.6;
}

.footer__name {
  font-family: var(--font-serif);
  font-size: clamp(1.25rem, 2vw, 1.5rem);
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: 0.08em;
}

.footer__name-en {
  font-family: var(--font-serif);
  font-size: 0.625rem;
  letter-spacing: 0.3em;
}

.footer__links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
}

.footer__links li {
  display: flex;
  align-items: center;
}

.footer__links li + li::before {
  content: "";
  width: 1px;
  height: 0.9rem;
  margin-inline: clamp(1.25rem, 3vw, 2.25rem);
  background: var(--c-line);
}

.footer__links a {
  transition: opacity 0.3s ease;
}

.footer__links a:hover {
  opacity: 0.6;
}

.footer__sns {
  display: grid;
  place-content: center;
  flex-shrink: 0;
  width: 3rem;
  height: 3rem;
  margin-left: auto;
  border: 1px solid currentColor;
  border-radius: 50%;
  position: relative;
  transition: opacity 0.3s ease;
}

.footer__sns::before {
  content: "";
  position: absolute;
  top: 50%;
  left: clamp(-3rem, -4vw, -2rem);
  width: 1px;
  height: 2.75rem;
  background: var(--c-line);
  transform: translateY(-50%);
}

.footer__sns svg {
  width: 1.8rem;
  height: 1.8rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
}

.footer__sns-dot {
  fill: currentColor;
  stroke: none;
}

.footer__sns:hover {
  opacity: 0.55;
}

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 1.25rem;
}

.footer__copy {
  font-family: var(--font-serif);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
}

.footer__top {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-family: var(--font-serif);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  transition: opacity 0.3s ease;
}

.footer__top:hover {
  opacity: 0.6;
}

.footer__top svg {
  width: 0.75rem;
  height: 1.25rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.2;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform 0.3s var(--ease-out);
}

.footer__top:hover svg {
  transform: translateY(-3px);
}

.page-top {
  position: fixed;
  right: clamp(1rem, 2.5vw, 2rem);
  bottom: clamp(1rem, 2.5vw, 2rem);
  z-index: 20;
  display: grid;
  place-content: center;
  justify-items: center;
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 6px 20px rgba(30, 50, 71, 0.12);
  font-size: 0.5625rem;
  letter-spacing: 0.12em;
  color: var(--c-navy);
  transition:
    transform 0.3s var(--ease-out),
    opacity 0.3s ease,
    visibility 0.3s;
}

.page-top.is-hidden {
  opacity: 0;
  visibility: hidden;
}

.page-top:hover {
  transform: translateY(-3px);
}

.page-top svg {
  width: 1rem;
  height: 1rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

@media (prefers-reduced-motion: reduce) {
  .js .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

@media (max-width: 1024px) {
  .service__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .service-tile {
    aspect-ratio: 4 / 3;
  }
}

@media (max-width: 860px) {
  .case {
    grid-template-columns: minmax(0, 1fr);
    gap: 1.5rem;
  }

  .case__visual {
    aspect-ratio: 16 / 6;
  }
}

@media (max-width: 860px) {
  .message__inner {
    flex-direction: column;
    align-items: stretch;
    gap: 2rem;
  }

  .message__title {
    width: fit-content;
    margin: 0 auto;
    font-size: clamp(1.5rem, 6vw, 1.875rem);
    letter-spacing: 0.08em;
  }

  .message__body p + p {
    margin-top: 0.8rem;
  }

  .company__grid,
  .office__top {
    grid-template-columns: minmax(0, 1fr);
  }

  .company__row {
    grid-template-columns: minmax(0, 1fr);
    gap: 0.25rem;
    padding-block: 1rem;
  }

  .office__photo {
    min-height: 0;
    aspect-ratio: 16 / 10;
  }

  .office__map {
    height: 280px;
  }

  .sp-only {
    display: inline;
  }

  .footer__main {
    flex-direction: column;
    text-align: center;
  }

  .footer__brand {
    justify-items: center;
  }

  .footer__links {
    justify-content: center;
    row-gap: 0.75rem;
  }

  .footer__sns {
    margin-left: 0;
  }

  .footer__sns::before {
    display: none;
  }
}

@media (max-width: 560px) {
  section:not(.hero) {
    padding-block: 3rem;
  }

  .follow-btn {
    gap: 1rem;
    padding: 0.875rem 1.25rem 0.875rem 0.875rem;
  }

  .follow-btn__icon {
    width: 3rem;
    height: 3rem;
  }

  .follow-btn__icon svg {
    width: 2.25rem;
    height: 2.25rem;
  }

  .follow-btn__label {
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    white-space: nowrap;
  }

  .follow-btn__arrow svg {
    width: 1.25rem;
  }

  .footer__links {
    font-size: 0.75rem;
  }

  .footer__links li + li::before {
    margin-inline: 0.75rem;
  }

  .message__body {
    font-size: 0.9375rem;
    line-height: 2;
    letter-spacing: 0.02em;
  }

  .message__body br {
    display: none;
  }

  .service__list {
    gap: 0.5rem;
  }

  .service-tile {
    aspect-ratio: 3 / 4;
  }

  .service-tile__body {
    padding: 1rem;
  }

  .service-tile__num {
    font-size: 0.5625rem;
  }

  .service-tile__title {
    font-size: 1.25rem;
  }

  .service-tile__text {
    font-size: 0.75rem;
  }

  .case__visual {
    aspect-ratio: 16 / 6;
  }

  .section-title {
    font-size: 1.375rem;
    letter-spacing: 0.06em;
  }

  .case__question {
    font-size: 1.125rem;
    letter-spacing: 0.02em;
  }

  .case__question br {
    display: none;
  }

  .btn {
    min-width: 0;
    width: 100%;
  }
}