:root {
  --ink: #151820;
  --muted: #5d6573;
  --paper: #fbfaf7;
  --line: #e6e1d8;
  --ton: #16a7e8;
  --mint: #42d5b8;
  --sakura: #f6a9b9;
  --gold: #f2bb4a;
  --coral: #ff7f62;
  --white: #ffffff;
  --shadow: 0 24px 70px rgba(21, 24, 32, 0.13);
}

* {
  box-sizing: border-box;
}

html {
  max-width: 100%;
  overflow-x: hidden;
  scroll-behavior: smooth;
}

body {
  max-width: 100%;
  overflow-x: hidden;
  margin: 0;
  font-family: Inter, "Noto Sans JP", system-ui, sans-serif;
  color: var(--ink);
  background:
    linear-gradient(rgba(251, 250, 247, 0.86), rgba(251, 250, 247, 0.9)),
    url("assets/japan-four-seasons-bg.png") top center / 100% auto no-repeat,
    linear-gradient(90deg, rgba(21, 24, 32, 0.035) 1px, transparent 1px),
    linear-gradient(rgba(21, 24, 32, 0.035) 1px, transparent 1px),
    var(--paper);
  background-size: auto, 100% auto, 42px 42px, 42px 42px, auto;
  background-repeat: no-repeat, no-repeat, repeat, repeat, no-repeat;
  padding-top: 74px;
}

body.lang-ja [data-i18n="en"],
body.lang-en [data-i18n="ja"] {
  display: none !important;
}

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

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 18px;
  min-height: 74px;
  padding: 12px clamp(18px, 4vw, 54px);
  border-bottom: 1px solid rgba(230, 225, 216, 0.9);
  background: rgba(251, 250, 247, 0.88);
  backdrop-filter: blur(18px);
  overflow: hidden;
}

.site-header > * {
  min-width: 0;
}

.header-tools {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.78);
}

.lang-button {
  min-height: 36px;
  border: 0;
  border-radius: 999px;
  padding: 0 13px;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 0.82rem;
  font-weight: 900;
  cursor: pointer;
}

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

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
  letter-spacing: 0;
}

.brand img,
footer img {
  width: 40px;
  height: 40px;
  border-radius: 50%;
}

.quick-links {
  display: flex;
  justify-content: center;
  gap: 8px;
  color: var(--muted);
  font-weight: 800;
  font-size: 0.92rem;
  min-width: 0;
}

.quick-link {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0 16px;
  background: rgba(255, 255, 255, 0.82);
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
}

.quick-link svg {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.quick-link:hover {
  transform: translateY(-2px);
  border-color: var(--ink);
  background: var(--white);
}

.quick-link.buy {
  border-color: var(--ink);
  background: var(--ton);
  color: var(--white);
  box-shadow: 4px 4px 0 var(--ink);
}

.header-cta,
.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 0 20px;
  font-weight: 900;
  border: 1px solid var(--ink);
}

.header-cta {
  background: var(--ink);
  color: var(--white);
  box-shadow: 6px 6px 0 var(--gold);
}

.hero {
  min-height: calc(100svh - 75px);
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(340px, 0.98fr);
  align-items: center;
  gap: clamp(28px, 5vw, 80px);
  padding: clamp(34px, 6vw, 90px) clamp(18px, 5vw, 78px) 42px;
}

.hero-copy {
  max-width: 100%;
  min-width: 0;
}

.season-hero {
  position: relative;
}

.season-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at 12% 20%, rgba(246, 169, 185, 0.24), transparent 28%),
    radial-gradient(circle at 84% 18%, rgba(22, 167, 232, 0.14), transparent 30%);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--coral);
  font-size: 0.82rem;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 680px;
  margin-bottom: 22px;
  font-size: clamp(2rem, 4.4vw, 3.5rem);
  line-height: 0.98;
  letter-spacing: 0;
}

h1 [data-i18n] {
  display: block;
}

h2 {
  margin-bottom: 18px;
  max-width: 980px;
  font-size: clamp(2rem, 4.1vw, 4rem);
  line-height: 1.12;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 1.12rem;
  letter-spacing: 0;
}

.hero-lead {
  max-width: 650px;
  margin-bottom: 14px;
  color: var(--ink);
  font-size: clamp(1.08rem, 2vw, 1.42rem);
  line-height: 1.7;
  font-weight: 800;
  overflow-wrap: anywhere;
}

.hero-lead.en,
.hero-lead.sub,
.section-heading p,
.split p,
.story-text p,
.community-band p,
.risk-note {
  color: var(--muted);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.button.primary {
  background: var(--ton);
  color: var(--white);
  box-shadow: 6px 6px 0 var(--ink);
}

.button.secondary {
  background: var(--white);
  color: var(--ink);
  box-shadow: 6px 6px 0 var(--mint);
}

.hero-visual {
  position: relative;
  align-self: stretch;
  min-height: 560px;
  border: 1px solid var(--line);
  border-radius: 30px;
  overflow: hidden;
  background: #111722;
  box-shadow: var(--shadow);
}

.hero > *,
.story-grid > *,
.split > *,
.community-band > * {
  min-width: 0;
}

.hero-scene {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.blink-eye {
  position: absolute;
  top: 39.7%;
  z-index: 2;
  width: 8.8%;
  height: 4.2%;
  border-radius: 999px;
  background: rgba(7, 8, 12, 0.96);
  box-shadow: inset 0 -1px 0 rgba(226, 181, 138, 0.22);
  opacity: 0;
  transform: scaleY(0);
  transform-origin: center;
  filter: blur(0.35px);
  transition: opacity 70ms ease, transform 70ms ease;
  pointer-events: none;
}

.blink-eye.left {
  left: 36.9%;
}

.blink-eye.right {
  left: 64.1%;
}

.blink-eye.is-blinking {
  opacity: 1;
  transform: scaleY(1);
}

.signal-panel {
  position: absolute;
  left: 22px;
  right: 22px;
  bottom: 22px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.signal-panel a {
  min-height: 54px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid rgba(255, 255, 255, 0.45);
  border-radius: 18px;
  color: var(--white);
  background: rgba(21, 24, 32, 0.66);
  backdrop-filter: blur(12px);
  font-size: 0.88rem;
  font-weight: 900;
  text-align: center;
}

.signal-panel svg {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.signal-panel a:hover {
  border-color: rgba(255, 255, 255, 0.9);
  background: rgba(21, 24, 32, 0.82);
}

.section-pad {
  padding: clamp(72px, 10vw, 140px) clamp(18px, 5vw, 78px);
}

.section-heading {
  max-width: 860px;
  margin-bottom: 36px;
}

.section-heading p {
  max-width: 760px;
  font-size: 1.05rem;
  line-height: 1.85;
  font-weight: 700;
}

.story-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.75fr);
  gap: 28px;
  align-items: stretch;
}

.story-text,
.quote-block,
.pillars article,
.steps a {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 18px 55px rgba(21, 24, 32, 0.08);
}

.story-text {
  padding: clamp(24px, 4vw, 48px);
  border-radius: 24px;
  font-size: 1.15rem;
  line-height: 1.9;
  font-weight: 800;
}

.quote-block {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: 280px;
  padding: 32px;
  border-radius: 24px;
  color: var(--white);
  background: linear-gradient(135deg, #151820, #233142);
}

.quote-block p {
  color: var(--sakura);
  font-weight: 900;
}

.quote-block strong {
  max-width: 360px;
  font-size: clamp(1.7rem, 3vw, 2.8rem);
  line-height: 1.1;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(320px, 1.05fr);
  gap: clamp(28px, 5vw, 70px);
  align-items: center;
}

.split.reverse {
  grid-template-columns: minmax(320px, 1fr) minmax(0, 0.95fr);
}

.split img {
  width: 100%;
  aspect-ratio: 1 / 0.82;
  object-fit: cover;
  border-radius: 28px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.hero-visual,
.community-band img,
.moment-gallery img,
.split img {
  will-change: transform;
}

.community-band img,
.split img {
  animation: soft-float 7.5s ease-in-out infinite;
}

.moment-gallery figure:nth-child(odd) img {
  animation: soft-float 6.8s ease-in-out infinite;
}

.moment-gallery figure:nth-child(even) img {
  animation: soft-float-alt 7.2s ease-in-out infinite;
}

#concept .split img {
  aspect-ratio: 16 / 9;
}

.split p {
  font-size: 1.08rem;
  line-height: 1.9;
  font-weight: 700;
}

.pillars {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-top: 48px;
}

.pillars article {
  min-height: 230px;
  padding: 24px;
  border-radius: 22px;
}

.pillar-icon {
  display: inline-flex;
  width: 52px;
  height: 52px;
  align-items: center;
  justify-content: center;
  margin-bottom: 28px;
  border-radius: 50%;
  background: var(--gold);
  border: 1px solid var(--ink);
  color: var(--ink);
  font-weight: 900;
}

.pillars p,
.steps small {
  color: var(--muted);
  line-height: 1.7;
  font-weight: 700;
}

.community-band {
  display: grid;
  grid-template-columns: minmax(260px, 0.82fr) minmax(0, 1.18fr);
  gap: clamp(24px, 4vw, 58px);
  align-items: center;
  padding: clamp(24px, 5vw, 58px);
  border: 1px solid var(--ink);
  border-radius: 34px;
  background: var(--white);
  box-shadow: 10px 10px 0 var(--sakura);
}

.community-band img {
  border-radius: 24px;
  width: 100%;
  max-height: 520px;
  object-fit: contain;
}

.community-band p {
  font-size: 1.08rem;
  line-height: 1.9;
  font-weight: 700;
}

.note {
  padding: 18px 20px;
  border-left: 5px solid var(--ton);
  background: #eef9fd;
  color: var(--ink) !important;
  border-radius: 0 16px 16px 0;
}

.moments {
  background: #f3f0ea;
}

.moment-gallery {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr 1.1fr 0.9fr;
  gap: 18px;
  align-items: end;
}

.moment-gallery figure {
  margin: 0;
}

.moment-gallery img {
  width: 100%;
  aspect-ratio: 1 / 1.22;
  object-fit: cover;
  border-radius: 22px;
  border: 1px solid var(--line);
  box-shadow: 0 18px 48px rgba(21, 24, 32, 0.14);
}

.moment-gallery figure:nth-child(2),
.moment-gallery figure:nth-child(4) {
  transform: translateY(28px);
}

figcaption {
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 900;
  text-align: center;
  text-transform: uppercase;
}

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.steps a {
  display: grid;
  gap: 12px;
  min-height: 210px;
  padding: 24px;
  border-radius: 22px;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.steps a:hover {
  transform: translateY(-4px);
  box-shadow: 0 24px 65px rgba(21, 24, 32, 0.14);
}

.steps a > span {
  width: 46px;
  height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: var(--mint);
  color: var(--ink);
  font-weight: 900;
}

.steps strong {
  font-size: 1.1rem;
}

.risk-note {
  max-width: 920px;
  margin: 24px 0 0;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.72);
  font-size: 0.95rem;
  line-height: 1.8;
  font-weight: 700;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-top: 32px;
}

.timeline span {
  min-height: 54px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--ink);
  background: var(--white);
  font-size: 0.9rem;
  font-weight: 900;
}

.timeline span:first-child {
  border-radius: 16px 0 0 16px;
}

.timeline span:last-child {
  border-radius: 0 16px 16px 0;
  background: var(--gold);
}

.final-cta {
  padding: clamp(72px, 10vw, 140px) 18px;
  color: var(--white);
  text-align: center;
  background: #151820;
}

.final-cta p {
  margin-bottom: 12px;
  color: var(--sakura);
  font-weight: 900;
}

.final-cta h2 {
  max-width: 940px;
  margin-inline: auto;
}

.final-cta .hero-actions {
  justify-content: center;
}

footer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 24px 18px;
  border-top: 1px solid #303540;
  color: #b8bec8;
  background: #151820;
  font-size: 0.9rem;
  font-weight: 700;
}

@media (max-width: 980px) {
  .site-header {
    grid-template-columns: auto 1fr;
    min-height: 112px;
    align-items: start;
  }

  .header-tools {
    justify-self: end;
  }

  body {
    padding-top: 112px;
  }

  .quick-links {
    grid-column: 1 / -1;
    order: 3;
    justify-content: flex-start;
    width: 100%;
    overflow-x: auto;
    padding-bottom: 2px;
    scrollbar-width: none;
  }

  .quick-links::-webkit-scrollbar {
    display: none;
  }

  .hero,
  .story-grid,
  .split,
  .split.reverse,
  .community-band {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: 0;
  }

  .hero-visual {
    min-height: 460px;
  }

  .pillars,
  .steps,
  .moment-gallery {
    grid-template-columns: repeat(2, 1fr);
  }

  .moment-gallery figure:nth-child(2),
  .moment-gallery figure:nth-child(4) {
    transform: none;
  }
}

@media (max-width: 620px) {
  .site-header {
    grid-template-columns: auto 1fr;
    padding: 12px 14px;
    gap: 10px;
  }

  .brand span {
    display: none;
  }

  .header-cta {
    display: none;
  }

  .header-tools {
    gap: 0;
  }

  .lang-switch {
    margin-left: auto;
  }

  .lang-button {
    min-height: 34px;
    padding-inline: 10px;
    font-size: 0.78rem;
  }

  .quick-link {
    min-height: 38px;
    padding: 0 12px;
    font-size: 0.82rem;
    white-space: nowrap;
  }

  .quick-link:not(.buy) {
    width: 42px;
    padding-inline: 0;
  }

  .quick-link:not(.buy) span {
    display: none;
  }

  .quick-link svg {
    width: 16px;
    height: 16px;
  }

  h1 {
    max-width: 350px;
    font-size: clamp(1.78rem, 7.1vw, 1.95rem);
    line-height: 1.08;
  }

  h2 {
    font-size: clamp(1.95rem, 9vw, 2.65rem);
    line-height: 1.16;
  }

  .hero {
    padding-top: 26px;
    padding-inline: 24px;
  }

  .hero-visual {
    min-height: 380px;
    border-radius: 24px;
  }

  .signal-panel {
    grid-template-columns: 1fr;
  }

  .pillars,
  .steps,
  .moment-gallery,
  .timeline {
    grid-template-columns: 1fr;
  }

  .community-band {
    box-shadow: 6px 6px 0 var(--sakura);
  }

  footer {
    align-items: flex-start;
    text-align: left;
  }
}

@keyframes soft-float {
  0%,
  100% {
    transform: translateY(0) rotate(0deg);
  }
  50% {
    transform: translateY(-10px) rotate(0.4deg);
  }
}

@keyframes soft-float-alt {
  0%,
  100% {
    transform: translateY(0) rotate(0deg);
  }
  50% {
    transform: translateY(8px) rotate(-0.35deg);
  }
}

@keyframes living-float {
  0%,
  100% {
    transform: scale(1) translateY(0);
  }
  50% {
    transform: scale(1.018) translateY(-6px);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
  }
}