:root {
  --ink: #181613;
  --muted: #6c655d;
  --paper: #f3efe7;
  --paper-deep: #e6ded0;
  --stone: #a59a8c;
  --olive: #374235;
  --copper: #9a6f4d;
  --line: rgba(24, 22, 19, 0.16);
  --white: #fffaf0;
  --header-height: 76px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family:
    "Noto Sans SC",
    "Microsoft YaHei",
    "PingFang SC",
    Arial,
    sans-serif;
  line-height: 1.6;
  text-rendering: geometricPrecision;
  overflow-x: hidden;
}

body.nav-open {
  overflow: hidden;
}

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

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

button,
input,
textarea {
  font: inherit;
}

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(22px, 4.4vw, 64px);
  color: var(--white);
  transition:
    background 240ms ease,
    color 240ms ease,
    border-color 240ms ease;
}

.site-header.is-scrolled {
  background: rgba(243, 239, 231, 0.91);
  color: var(--ink);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}

.brand {
  display: grid;
  gap: 0;
  letter-spacing: 0;
}

.brand span {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.22rem;
  line-height: 1;
}

.brand small {
  margin-top: 5px;
  color: currentColor;
  font-size: 0.6rem;
  opacity: 0.66;
  text-transform: uppercase;
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: clamp(20px, 3vw, 40px);
  font-size: 0.86rem;
}

.desktop-nav a {
  opacity: 0.76;
  transition: opacity 180ms ease;
}

.desktop-nav a:hover {
  opacity: 1;
}

.menu-button {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 0;
  background: transparent;
  color: currentColor;
}

.menu-button span {
  display: block;
  width: 24px;
  height: 1px;
  margin: 7px auto;
  background: currentColor;
  transition:
    transform 200ms ease,
    opacity 200ms ease;
}

.menu-button[aria-expanded="true"] span:first-child {
  transform: translateY(4px) rotate(35deg);
}

.menu-button[aria-expanded="true"] span:last-child {
  transform: translateY(-4px) rotate(-35deg);
}

.mobile-nav {
  position: fixed;
  z-index: 18;
  inset: 0;
  display: grid;
  place-content: center;
  gap: 28px;
  background: rgba(24, 22, 19, 0.94);
  color: var(--white);
  font-size: 1.4rem;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-10px);
  transition:
    opacity 220ms ease,
    transform 220ms ease;
}

.mobile-nav.is-open {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  align-items: end;
  overflow: hidden;
  color: var(--white);
}

.hero-media,
.hero-shade {
  position: absolute;
  inset: 0;
}

.hero-media {
  background:
    linear-gradient(90deg, rgba(18, 17, 15, 0.78), rgba(18, 17, 15, 0.32) 42%, rgba(18, 17, 15, 0.14)),
    url("./assets/scene-hero-web.jpg") center / cover;
  transform: scale(1.04);
  animation: heroIn 1200ms ease forwards;
}

.hero-shade {
  background:
    linear-gradient(0deg, rgba(24, 22, 19, 0.66), transparent 42%),
    radial-gradient(circle at 72% 36%, rgba(255, 244, 220, 0.16), transparent 30%);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(690px, calc(100% - 40px));
  margin: 0 0 clamp(112px, 15vh, 164px) clamp(20px, 8vw, 110px);
}

.eyebrow,
.section-kicker {
  margin: 0 0 16px;
  color: var(--copper);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #dcc4aa;
}

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

h1,
h2 {
  font-family: Georgia, "Times New Roman", "Songti SC", "STSong", "Noto Serif SC", serif;
  font-weight: 400;
  letter-spacing: 0;
}

h1 {
  max-width: 680px;
  margin-bottom: 22px;
  font-size: clamp(3rem, 7.6vw, 6.6rem);
  line-height: 0.98;
}

.hero-copy {
  max-width: 520px;
  margin-bottom: 30px;
  color: rgba(255, 250, 240, 0.84);
  font-size: clamp(0.95rem, 1.12vw, 1.08rem);
}

.hero-actions,
.section-head,
.contact-inner,
.site-footer {
  display: flex;
  align-items: center;
}

.hero-actions {
  gap: 14px;
  flex-wrap: wrap;
}

.button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  border: 1px solid currentColor;
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.9rem;
  transition:
    transform 180ms ease,
    background 180ms ease,
    color 180ms ease,
    border-color 180ms ease;
}

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

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

.button.ghost {
  color: var(--white);
  background: rgba(255, 250, 240, 0.08);
  backdrop-filter: blur(10px);
}

.button.soft {
  border-color: rgba(255, 250, 240, 0.34);
  background: rgba(255, 250, 240, 0.18);
  color: var(--white);
  backdrop-filter: blur(10px);
}

.button.soft:hover {
  border-color: rgba(255, 250, 240, 0.72);
  background: rgba(255, 250, 240, 0.26);
}

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

.button.dark:hover {
  background: #2a251f;
  border-color: #2a251f;
}

.hero-proof {
  position: absolute;
  z-index: 2;
  left: clamp(20px, 8vw, 110px);
  right: clamp(20px, 8vw, 110px);
  bottom: 30px;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 250, 240, 0.3);
  color: rgba(255, 250, 240, 0.78);
  font-size: 0.82rem;
}

.section-pad {
  padding: clamp(74px, 10vw, 128px) clamp(20px, 6vw, 86px);
}

.intro {
  background: var(--paper);
}

.intro-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.75fr);
  gap: clamp(36px, 7vw, 92px);
  align-items: start;
}

.intro h2,
.section-head h2,
.craft-panel h2,
.capacity h2,
.editorial h2,
.contact h2 {
  margin-bottom: 0;
  font-size: clamp(1.95rem, 3.55vw, 4.05rem);
  line-height: 1.08;
}

.intro-copy {
  color: var(--muted);
  font-size: 0.98rem;
}

.material-spotlight {
  background: #eee7dc;
}

.section-head {
  justify-content: space-between;
  gap: 42px;
  margin-bottom: clamp(38px, 5.4vw, 66px);
}

.section-head p {
  max-width: 400px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.94rem;
}

.material-layout {
  display: grid;
  grid-template-columns: minmax(300px, 0.88fr) minmax(320px, 1.12fr);
  gap: clamp(34px, 6vw, 86px);
  align-items: start;
}

.material-feature {
  position: sticky;
  top: 104px;
}

.material-feature img {
  aspect-ratio: 4 / 5;
  object-fit: cover;
  filter: saturate(0.78) contrast(1.03) brightness(0.95);
}

.material-feature div {
  display: grid;
  gap: 8px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.material-feature p {
  margin-bottom: 0;
  color: var(--muted);
}

.material-feature h3 {
  max-width: 390px;
  margin-bottom: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.35rem, 2vw, 2.08rem);
  font-weight: 400;
  line-height: 1.16;
}

.material-list {
  display: grid;
}

.material-row {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 24px;
  padding: 30px 0;
  border-top: 1px solid var(--line);
}

.material-row:last-child {
  border-bottom: 1px solid var(--line);
}

.material-row span {
  color: var(--copper);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.2rem;
}

.material-title-line {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 10px;
}

.material-row h3 {
  margin-bottom: 0;
  font-size: clamp(1.28rem, 1.9vw, 1.95rem);
  font-weight: 500;
}

.material-link {
  flex: 0 0 auto;
  padding: 8px 15px 9px;
  border: 1px solid rgba(94, 77, 58, 0.26);
  border-radius: 999px;
  color: #5c4938;
  font-size: 0.78rem;
  line-height: 1;
  text-decoration: none;
  transition:
    border-color 180ms ease,
    background 180ms ease,
    color 180ms ease,
    transform 180ms ease;
}

.material-link:hover {
  border-color: var(--copper);
  background: rgba(164, 113, 72, 0.12);
  color: var(--ink);
  transform: translateY(-1px);
}

.material-row p {
  max-width: 640px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.94rem;
}

.craft {
  display: grid;
  grid-template-columns: minmax(320px, 0.96fr) minmax(360px, 1.04fr);
  gap: clamp(34px, 6vw, 92px);
  align-items: center;
  background: #e8dfd2;
  color: var(--ink);
}

.craft-media {
  position: relative;
  min-height: 560px;
  overflow: hidden;
}

.craft-media img {
  width: 100%;
  height: 100%;
  min-height: 560px;
  object-fit: cover;
  filter: saturate(0.68) contrast(1.04) brightness(0.96);
}

.craft-media::after {
  position: absolute;
  inset: 0;
  content: "";
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(24, 23, 20, 0.04), rgba(24, 23, 20, 0.16)),
    linear-gradient(90deg, rgba(255, 250, 240, 0.12), transparent 48%);
}

.craft-panel {
  align-self: center;
  max-width: 620px;
  padding: clamp(18px, 3vw, 40px) 0;
}

.craft-panel .section-kicker {
  color: var(--copper);
}

.craft-panel h2 {
  max-width: 560px;
  font-size: clamp(2rem, 3vw, 3.25rem);
  line-height: 1.08;
  letter-spacing: 0;
}

.editorial p,
.contact p {
  color: rgba(255, 250, 240, 0.72);
}

.craft-panel > p {
  max-width: 540px;
  margin: 24px 0 40px;
  color: #625b50;
  font-size: 0.98rem;
  line-height: 1.9;
}

.quality-list {
  display: grid;
  gap: 0;
  margin: 0;
  border-top: 1px solid rgba(94, 77, 58, 0.2);
}

.quality-list div {
  display: grid;
  grid-template-columns: minmax(170px, 0.42fr) minmax(0, 0.58fr);
  gap: 28px;
  padding: 23px 0;
  border-bottom: 1px solid rgba(94, 77, 58, 0.2);
}

.quality-list dt {
  margin-bottom: 0;
  color: #211f1b;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.08rem, 1.35vw, 1.34rem);
  font-weight: 400;
  line-height: 1.25;
}

.quality-list dd {
  margin: 0;
  color: #6d655c;
  font-size: 0.9rem;
  line-height: 1.75;
}

.capacity {
  background: #e9e1d4;
}

.capacity-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.capacity-card {
  position: relative;
  display: grid;
  grid-template-rows: minmax(300px, 42vh) auto;
  background: rgba(255, 250, 240, 0.42);
  overflow: hidden;
}

.capacity-card img {
  grid-row: 1;
  height: 100%;
  object-fit: cover;
  filter: grayscale(0.25) contrast(1.08) saturate(0.64) brightness(0.78);
}

.capacity-card::after {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: min(42vh, 500px);
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(24, 22, 19, 0.08), transparent 35%, rgba(24, 22, 19, 0.26)),
    radial-gradient(circle at 72% 14%, rgba(255, 250, 240, 0.16), transparent 30%);
}

.capacity-card .warehouse-image {
  object-position: center;
  filter: grayscale(0.2) contrast(1.08) saturate(0.62) brightness(0.8);
}

.capacity-card div {
  position: relative;
  z-index: 1;
  grid-row: 2;
  padding: clamp(24px, 4vw, 42px);
  background: rgba(255, 250, 240, 0.5);
}

.capacity-card span {
  display: block;
  margin-bottom: 14px;
  color: var(--copper);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.capacity-card h3 {
  max-width: 540px;
  margin-bottom: 14px;
  font-family: Georgia, "Times New Roman", "Noto Serif SC", serif;
  font-size: clamp(1.45rem, 2.05vw, 2.28rem);
  font-weight: 400;
  line-height: 1.13;
}

.capacity-card p {
  max-width: 660px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.93rem;
}

.capacity-card:hover img,
.material-feature:hover img {
  filter: saturate(0.82) contrast(1.06) brightness(0.92);
}

.metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: clamp(28px, 5vw, 62px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.metrics div {
  min-height: 148px;
  display: grid;
  align-content: center;
  gap: 8px;
  padding: 24px;
  border-right: 1px solid var(--line);
}

.metrics div:last-child {
  border-right: 0;
}

.metrics strong {
  color: var(--ink);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.65rem, 3.2vw, 3.35rem);
  font-weight: 400;
  line-height: 1;
}

.metrics span {
  color: var(--muted);
}

.home-versions {
  display: grid;
  grid-template-columns: minmax(320px, 1.02fr) minmax(360px, 0.98fr);
  gap: clamp(36px, 7vw, 96px);
  align-items: center;
  background: #efe8dc;
}

.home-version-media {
  position: relative;
  min-height: 520px;
  background: #d7c5ad;
  overflow: hidden;
}

.home-version-media img {
  position: relative;
  z-index: 1;
  height: 100%;
  min-height: 520px;
  object-fit: cover;
  object-position: center;
  filter: saturate(0.88) contrast(1.02) brightness(0.94);
}

.home-version-media::after {
  position: absolute;
  inset: 0;
  content: "";
  z-index: 2;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(24, 22, 19, 0.02), rgba(24, 22, 19, 0.18)),
    radial-gradient(circle at 18% 18%, rgba(255, 250, 240, 0.2), transparent 34%);
}

.home-version-copy {
  max-width: 640px;
}

.home-version-copy h2 {
  margin-bottom: 24px;
  font-size: clamp(1.9rem, 3.4vw, 3.85rem);
  line-height: 1.12;
}

.home-version-copy p {
  max-width: 560px;
  color: var(--muted);
}

.version-points {
  display: grid;
  gap: 12px;
  margin: 28px 0 30px;
  padding: 0;
  list-style: none;
  color: #5f574d;
  font-size: 0.94rem;
}

.version-points li {
  padding-top: 12px;
  border-top: 1px solid rgba(94, 77, 58, 0.2);
}

.spaces {
  background: var(--paper);
}

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

.space-card {
  position: relative;
  min-height: 440px;
  overflow: hidden;
  color: var(--white);
}

.space-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(24, 22, 19, 0.58), transparent 48%);
}

.space-card img {
  height: 100%;
  min-height: 440px;
  object-fit: cover;
  filter: saturate(0.74) contrast(1.03) brightness(0.92);
  transition: transform 600ms ease;
}

.space-card:hover img {
  transform: scale(1.045);
}

.space-card h3 {
  position: absolute;
  z-index: 1;
  left: 24px;
  right: 24px;
  bottom: 22px;
  margin-bottom: 0;
  font-size: clamp(1.2rem, 1.6vw, 1.55rem);
  font-weight: 500;
}

.editorial {
  position: relative;
  overflow: hidden;
  background: var(--olive);
  color: var(--white);
}

.editorial-copy {
  max-width: 980px;
}

.editorial p {
  max-width: 620px;
  margin-top: 22px;
  font-size: 0.96rem;
}

.editorial-lines {
  position: absolute;
  right: clamp(20px, 7vw, 110px);
  bottom: clamp(40px, 8vw, 120px);
  display: grid;
  gap: 18px;
  width: min(28vw, 300px);
}

.editorial-lines span {
  height: 1px;
  background: rgba(255, 250, 240, 0.26);
  transform-origin: right;
}

.editorial-lines span:nth-child(2) {
  width: 76%;
  justify-self: end;
}

.editorial-lines span:nth-child(3) {
  width: 52%;
  justify-self: end;
}

.contact {
  background: var(--paper-deep);
}

.contact-inner {
  justify-content: space-between;
  gap: clamp(34px, 7vw, 92px);
  align-items: flex-start;
}

.contact-inner > div {
  max-width: 720px;
}

.contact p {
  max-width: 560px;
  margin-top: 24px;
  color: var(--muted);
}

.contact-form {
  width: min(480px, 100%);
  display: grid;
  gap: 18px;
}

.contact-form label {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-size: 0.9rem;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  border: 0;
  border-bottom: 1px solid rgba(24, 22, 19, 0.28);
  border-radius: 0;
  background: transparent;
  color: var(--ink);
  outline: none;
  padding: 11px 0 13px;
  resize: vertical;
}

.contact-form input:focus,
.contact-form textarea:focus {
  border-color: var(--copper);
}

.form-button {
  justify-self: start;
  margin-top: 6px;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  padding: 28px clamp(20px, 6vw, 86px);
  background: var(--ink);
  color: rgba(255, 250, 240, 0.72);
}

.footer-brand span {
  color: var(--white);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.2rem;
}

.footer-brand p {
  margin-bottom: 0;
  margin-top: 8px;
}

.footer-contact {
  display: flex;
  align-items: center;
  gap: clamp(18px, 3vw, 42px);
}

.footer-contact div {
  display: grid;
  gap: 6px;
}

.footer-contact small {
  color: rgba(255, 250, 240, 0.48);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.footer-contact strong,
.footer-contact a {
  color: var(--white);
  font-size: 1rem;
  font-weight: 500;
  text-decoration: none;
}

.version-header {
  color: var(--ink);
}

.versions-page {
  background: var(--paper);
}

.versions-page .reveal {
  opacity: 1;
  transform: none;
}

.versions-hero {
  padding-top: calc(var(--header-height) + clamp(58px, 8vw, 106px));
  background: #eee7dc;
}

.versions-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(320px, 1.05fr);
  gap: clamp(34px, 7vw, 96px);
  align-items: end;
}

.versions-hero h1 {
  margin-bottom: 0;
  color: var(--ink);
  font-size: clamp(2.8rem, 6.6vw, 6rem);
}

.versions-hero p {
  max-width: 620px;
  color: var(--muted);
  font-size: 0.96rem;
}

.versions-hero p:last-child {
  margin-bottom: 0;
}

.version-system {
  background: #e7dece;
}

.version-grid {
  display: grid;
  gap: 20px;
}

.version-card {
  display: grid;
  grid-template-columns: minmax(280px, 0.78fr) minmax(0, 1.22fr);
  min-height: 440px;
  background: rgba(255, 250, 240, 0.48);
}

.version-cover {
  position: relative;
  overflow: hidden;
  background: #ddd4c6;
}

.version-cover img {
  height: 100%;
  min-height: 440px;
  object-fit: cover;
  filter: saturate(0.78) contrast(1.04) brightness(0.94);
  transition: transform 600ms ease;
}

.version-cover::after {
  position: absolute;
  inset: 0;
  content: "";
  pointer-events: none;
  background: linear-gradient(180deg, rgba(24, 22, 19, 0.04), rgba(24, 22, 19, 0.18));
}

.version-card:hover .version-cover img {
  transform: scale(1.035);
}

.version-copy {
  display: grid;
  align-content: center;
  padding: clamp(28px, 5vw, 62px);
}

.version-copy span {
  margin-bottom: 14px;
  color: var(--copper);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.version-copy h2 {
  margin-bottom: 18px;
  font-size: clamp(1.55rem, 2.6vw, 3rem);
  line-height: 1.16;
}

.version-copy p {
  max-width: 720px;
  margin-bottom: 28px;
  color: var(--muted);
  font-size: 0.96rem;
}

.version-detail-link {
  justify-self: start;
  padding: 10px 18px 11px;
  border: 1px solid rgba(94, 77, 58, 0.28);
  border-radius: 999px;
  color: #5c4938;
  font-size: 0.82rem;
}

.version-next {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.7fr);
  gap: clamp(30px, 6vw, 84px);
  background: var(--paper);
}

.version-next h2 {
  max-width: 780px;
  margin-bottom: 0;
  font-size: clamp(1.8rem, 3.5vw, 3.75rem);
  line-height: 1.12;
}

.version-next p {
  align-self: end;
  max-width: 520px;
  margin-bottom: 0;
  color: var(--muted);
}

.version-detail-page {
  background: var(--paper);
}

.version-detail-hero {
  padding-top: calc(var(--header-height) + clamp(42px, 7vw, 96px));
  background: #eee7dc;
}

.back-link {
  display: inline-flex;
  margin-bottom: 28px;
  color: var(--copper);
  font-size: 0.82rem;
}

.version-detail-grid {
  display: grid;
  grid-template-columns: minmax(300px, 0.82fr) minmax(0, 1.18fr);
  gap: clamp(32px, 6vw, 86px);
  align-items: center;
}

.version-detail-grid img {
  aspect-ratio: 4 / 5;
  height: 100%;
  max-height: 720px;
  object-fit: cover;
  filter: saturate(0.78) contrast(1.04) brightness(0.94);
}

.version-detail-grid h1 {
  margin-bottom: 22px;
  color: var(--ink);
  font-size: clamp(2.3rem, 5vw, 5.2rem);
}

.version-detail-grid p {
  max-width: 620px;
  color: var(--muted);
}

.version-product-link {
  margin-top: 28px;
}

.version-placeholder {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.7fr);
  gap: clamp(30px, 6vw, 84px);
  background: var(--paper);
}

.version-placeholder h2 {
  max-width: 760px;
  margin-bottom: 0;
  font-size: clamp(1.8rem, 3.5vw, 3.75rem);
  line-height: 1.12;
}

.version-placeholder p {
  align-self: end;
  max-width: 520px;
  margin-bottom: 0;
  color: var(--muted);
}

.version-gallery {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  background: #e7dece;
}

.version-gallery-item {
  position: relative;
  margin: 0;
  overflow: visible;
  background: rgba(255, 250, 240, 0.46);
}

.version-gallery-item img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: contain;
  filter: saturate(0.92) contrast(1.03) brightness(0.96);
}

.version-gallery-item.is-focus-top img {
  object-position: center top;
}

.version-gallery-item figcaption {
  position: absolute;
  left: 18px;
  bottom: 16px;
  color: rgba(255, 250, 240, 0.88);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.12rem;
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition:
    opacity 700ms ease,
    transform 700ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes heroIn {
  from {
    transform: scale(1.08);
  }
  to {
    transform: scale(1.04);
  }
}

@media (max-width: 980px) {
  .desktop-nav {
    display: none;
  }

  .menu-button {
    display: block;
  }

  .intro-grid,
  .material-layout,
  .craft,
  .capacity-grid,
  .home-versions,
  .contact-inner,
  .versions-hero-grid,
  .version-card,
  .version-next,
  .version-detail-grid,
  .version-placeholder {
    grid-template-columns: 1fr;
  }

  .contact-inner {
    display: grid;
  }

  .material-feature {
    position: relative;
    top: auto;
  }

  .craft {
    padding-left: 0;
    padding-right: 0;
  }

  .craft-panel {
    padding: 56px 20px 0;
  }

  .quality-list div {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .space-strip {
    grid-template-columns: 1fr;
  }

  .metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .metrics div:nth-child(2) {
    border-right: 0;
  }

  .space-card,
  .space-card img {
    min-height: 360px;
  }
}

@media (max-width: 680px) {
  :root {
    --header-height: 62px;
  }

  body {
    width: 100%;
    max-width: 100vw;
    line-height: 1.68;
    font-size: 15px;
  }

  main,
  section,
  .section-pad,
  .intro-grid,
  .section-head,
  .material-layout,
  .material-list,
  .material-row,
  .craft,
  .capacity-grid,
  .home-versions,
  .metrics,
  .space-strip,
  .contact-inner {
    width: 100%;
    max-width: 100%;
    min-width: 0;
    overflow-x: hidden;
  }

  .site-header {
    padding: 0 24px;
  }

  .brand span {
    font-size: 1.08rem;
  }

  .brand small {
    font-size: 0.56rem;
  }

  .menu-button {
    width: 40px;
    height: 40px;
  }

  .mobile-nav {
    gap: 22px;
    font-size: 1.18rem;
  }

  .hero {
    min-height: 620px;
  }

  .hero-content {
    width: calc(100% - 48px);
    margin: 0 24px 132px;
  }

  .hero-media {
    background:
      linear-gradient(180deg, rgba(18, 17, 15, 0.18), rgba(18, 17, 15, 0.82)),
      linear-gradient(90deg, rgba(18, 17, 15, 0.48), rgba(18, 17, 15, 0.08)),
      url("./assets/scene-hero-web.jpg") 58% center / cover;
  }

  h1 {
    font-size: clamp(2.75rem, 14vw, 4.2rem);
    line-height: 1.02;
  }

  h1,
  h2,
  .material-feature h3,
  .capacity-card h3,
  .metrics strong {
    font-family: "Noto Sans SC", "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
    font-weight: 500;
    max-width: 100%;
    overflow-wrap: anywhere;
  }

  .hero-content.reveal {
    opacity: 1;
    transform: none;
  }

  .eyebrow,
  .section-kicker {
    margin-bottom: 12px;
    font-size: 0.62rem;
    letter-spacing: 0.1em;
  }

  .hero-copy {
    max-width: 310px;
    margin-bottom: 24px;
    font-size: 0.92rem;
    line-height: 1.82;
  }

  .hero-actions {
    gap: 9px;
  }

  .button {
    min-height: 40px;
    padding: 0 15px;
    font-size: 0.8rem;
  }

  .hero-proof {
    left: 24px;
    right: 24px;
    bottom: 18px;
    display: grid;
    grid-template-columns: 1fr;
    gap: 7px;
    padding-top: 14px;
    font-size: 0.76rem;
  }

  .section-pad {
    padding: 54px 24px;
  }

  .section-head {
    display: grid;
    gap: 14px;
    margin-bottom: 30px;
  }

  .section-head p,
  .intro-copy,
  .material-row p,
  .capacity-card p,
  .editorial p,
  .contact p {
    font-size: 0.9rem;
    line-height: 1.78;
  }

  .intro h2,
  .section-head h2,
  .craft-panel h2,
  .capacity h2,
  .editorial h2,
  .contact h2 {
    font-size: 1.46rem;
    line-height: 1.38;
    max-width: 15em;
  }

  .intro-grid {
    gap: 22px;
  }

  .intro-grid > *,
  .section-head > *,
  .material-layout > *,
  .craft > *,
  .capacity-grid > *,
  .home-versions > *,
  .contact-inner > * {
    min-width: 0;
  }

  .intro h2,
  .section-head h2,
  .craft-panel h2,
  .capacity h2,
  .editorial h2,
  .contact h2,
  .section-head p,
  .intro-copy p,
  .material-row p,
  .capacity-card p,
  .home-version-copy p,
  .editorial p,
  .contact p {
    max-width: 100%;
    word-break: break-all;
    overflow-wrap: anywhere;
    white-space: normal;
  }

  .intro-copy,
  .section-head p,
  .material-row p,
  .craft-panel > p,
  .quality-list dd,
  .capacity-card p,
  .home-version-copy p,
  .editorial p,
  .contact p {
    max-width: 22.5rem;
  }

  .intro-copy,
  .intro-copy p,
  .section-head p,
  .material-row > div,
  .material-row p,
  .craft-panel,
  .quality-list,
  .quality-list dt,
  .quality-list dd,
  .capacity-card div,
  .capacity-card p,
  .home-version-copy,
  .home-version-copy p,
  .editorial-copy,
  .contact-inner > div {
    width: 100%;
    max-width: 100%;
    min-width: 0;
  }

  .intro h2,
  .section-head h2,
  .craft-panel h2,
  .capacity h2,
  .editorial h2,
  .contact h2 {
    display: block;
    width: 100%;
  }

  .material-feature img {
    aspect-ratio: 1.12 / 1;
  }

  .material-feature div {
    padding-top: 16px;
  }

  .material-feature h3 {
    font-size: 1.12rem;
    line-height: 1.45;
  }

  .material-row {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 22px 0;
  }

  .material-row span {
    display: block;
    font-size: 0.98rem;
  }

  .material-title-line {
    display: grid;
    grid-template-columns: 1fr;
    align-items: start;
    gap: 10px;
    margin-bottom: 8px;
  }

  .material-row h3 {
    font-size: 1.08rem;
    line-height: 1.35;
  }

  .material-link {
    justify-self: start;
    min-height: 34px;
    padding: 7px 12px 8px;
    font-size: 0.72rem;
  }

  .material-row p {
    max-width: none;
  }

  .craft-media,
  .craft-media img {
    min-height: 300px;
  }

  .craft-media {
    order: 2;
    margin-top: 28px;
  }

  .craft-panel {
    order: 1;
    padding: 0;
  }

  .craft-panel > p {
    margin: 16px 0 24px;
    font-size: 0.88rem;
    line-height: 1.72;
  }

  .quality-list div {
    padding: 18px 0;
    gap: 6px;
  }

  .quality-list dt {
    font-size: 0.98rem;
    line-height: 1.42;
  }

  .quality-list dd {
    font-size: 0.86rem;
    line-height: 1.64;
  }

  .capacity-card {
    grid-template-rows: 220px auto;
    background: rgba(255, 250, 240, 0.5);
  }

  .capacity-card::after {
    display: none;
  }

  .capacity-card img {
    height: 100%;
    min-height: 210px;
    filter: grayscale(0.12) contrast(1.04) saturate(0.72) brightness(0.9);
  }

  .capacity-card div {
    padding: 22px 20px 26px;
    background: #f3efe7;
  }

  .capacity-card span {
    margin-bottom: 10px;
    font-size: 0.68rem;
  }

  .capacity-card h3 {
    font-size: 1.24rem;
    line-height: 1.32;
  }

  .metrics {
    grid-template-columns: 1fr;
    margin-top: 28px;
  }

  .metrics div,
  .metrics div:nth-child(2) {
    min-height: auto;
    padding: 18px 0;
    gap: 4px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .metrics strong {
    font-size: 1.72rem;
  }

  .metrics span {
    font-size: 0.88rem;
  }

  .home-versions {
    gap: 28px;
    padding-top: 58px;
    padding-bottom: 58px;
  }

  .home-version-media {
    min-height: 280px;
    order: 2;
  }

  .home-version-media img {
    min-height: 280px;
  }

  .home-version-copy {
    order: 1;
  }

  .home-version-copy h2 {
    max-width: 15em;
    font-family: "Noto Sans SC", "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
    font-size: 1.42rem;
    font-weight: 500;
    line-height: 1.34;
  }

  .home-version-copy p,
  .version-points {
    max-width: 22.5rem;
    font-size: 0.9rem;
    line-height: 1.78;
    word-break: break-all;
    overflow-wrap: anywhere;
  }

  .version-points {
    gap: 10px;
    margin: 22px 0 24px;
  }

  .version-points li {
    padding-top: 10px;
  }

  .space-card,
  .space-card img {
    min-height: 270px;
  }

  .space-strip {
    gap: 12px;
  }

  .space-card h3 {
    left: 18px;
    right: 18px;
    bottom: 18px;
    font-size: 1.02rem;
  }

  .editorial {
    padding-top: 62px;
    padding-bottom: 66px;
  }

  .contact-inner {
    gap: 28px;
  }

  .contact p {
    margin-top: 14px;
  }

  .contact-form {
    gap: 14px;
  }

  .contact-form label {
    font-size: 0.84rem;
  }

  .contact-form input,
  .contact-form textarea {
    font-size: 0.95rem;
  }

  .form-button {
    width: 100%;
  }

  .versions-hero {
    padding-top: calc(var(--header-height) + 52px);
  }

  .versions-hero h1 {
    font-family: "Noto Sans SC", "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
    font-size: 2.2rem;
    font-weight: 500;
    line-height: 1.14;
  }

  .versions-hero p,
  .version-copy p,
  .version-next p {
    max-width: 22.5rem;
    color: var(--muted);
    font-size: 0.9rem;
    line-height: 1.78;
    word-break: break-all;
    overflow-wrap: anywhere;
  }

  .version-system {
    padding-top: 24px;
    padding-bottom: 24px;
  }

  .version-grid {
    gap: 18px;
  }

  .version-card {
    min-height: auto;
    background: rgba(255, 250, 240, 0.46);
  }

  .version-cover img {
    min-height: 260px;
    max-height: 360px;
  }

  .version-copy {
    padding: 24px 20px 28px;
    overflow: hidden;
  }

  .version-copy span {
    margin-bottom: 10px;
    font-size: 0.66rem;
  }

  .version-copy h2 {
    margin-bottom: 12px;
    font-family: "Noto Sans SC", "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
    font-size: 1.24rem;
    font-weight: 500;
    line-height: 1.35;
  }

  .version-copy p {
    max-width: 100%;
    margin-bottom: 18px;
  }

  .version-detail-link {
    min-height: 36px;
    padding: 8px 14px;
    font-size: 0.76rem;
  }

  .version-next h2 {
    max-width: 15em;
    font-family: "Noto Sans SC", "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
    font-size: 1.42rem;
    font-weight: 500;
    line-height: 1.34;
  }

  .version-detail-hero {
    padding-top: calc(var(--header-height) + 38px);
  }

  .back-link {
    margin-bottom: 22px;
    font-size: 0.78rem;
  }

  .version-detail-grid {
    gap: 24px;
  }

  .version-detail-grid img {
    aspect-ratio: 1.1 / 1;
    max-height: 360px;
  }

  .version-detail-grid h1,
  .version-placeholder h2 {
    max-width: 15em;
    font-family: "Noto Sans SC", "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
    font-size: 1.56rem;
    font-weight: 500;
    line-height: 1.28;
  }

  .version-detail-grid p,
  .version-placeholder p {
    max-width: 22.5rem;
    color: var(--muted);
    font-size: 0.9rem;
    line-height: 1.78;
    word-break: break-all;
    overflow-wrap: anywhere;
  }

  .version-gallery {
    grid-template-columns: 1fr;
    gap: 18px;
    padding-top: 28px;
    padding-bottom: 28px;
  }

  .version-gallery-item img {
    width: 100%;
    height: auto;
  }

  .version-gallery-item figcaption {
    left: 14px;
    bottom: 12px;
    font-size: 0.96rem;
  }

  .metrics div:last-child {
    border-bottom: 0;
  }

  .editorial-lines {
    display: none;
  }

  .site-footer {
    display: grid;
    gap: 22px;
    padding: 26px 20px;
    font-size: 0.82rem;
  }

  .footer-brand p {
    overflow-wrap: anywhere;
  }

  .footer-contact {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: end;
    gap: 14px;
  }
}