/* ==========================================================================
   JIAHE CENTURY — corporate site
   Design tokens, layout, components. No external dependencies.
   ========================================================================== */

/* ---------- fonts ---------- */
@font-face {
  font-family: 'JC Serif';
  src: url('../fonts/noto-serif-sc-600.woff2') format('woff2');
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'JC Serif';
  src: url('../fonts/noto-serif-sc-400.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'JC Display';
  src: url('../fonts/playfair-400.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'JC Display';
  src: url('../fonts/playfair-500.woff2') format('woff2');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 88px; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
ul, ol, dl, dd, figure, blockquote { margin: 0; padding: 0; }
li { list-style: none; }
h1, h2, h3, h4, p { margin: 0; }
::selection { background: var(--brand); color: var(--ink); }
:focus-visible { outline: 2px solid var(--brand); outline-offset: 4px; }

/* ---------- tokens ---------- */
:root {
  --ink: #14130F;
  --ink-2: #1B1915;
  --paper: #F8F4EC;
  --sand: #EDE6D8;
  --gold: #A9793C;
  --brand: #FFC61A;
  --muted: #6B6458;
  --line: rgba(20, 19, 15, .15);
  --line-2: rgba(20, 19, 15, .08);
  --line-light: rgba(255, 255, 255, .16);

  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "HarmonyOS Sans SC",
          "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", "Segoe UI", Arial, sans-serif;
  --serif: "JC Serif", "Songti SC", "STSong", "Source Han Serif SC", "Noto Serif SC", "SimSun", serif;
  --display: "JC Display", "JC Serif", "Times New Roman", serif;

  --wrap: 1280px;
  --gutter: clamp(22px, 5vw, 72px);
  --ease: cubic-bezier(.22, .7, .18, 1);
}

/* ---------- helpers ---------- */
.wrap { width: min(var(--wrap), 100% - var(--gutter) * 2); margin-inline: auto; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip-link {
  position: fixed; top: -100px; left: 8px; z-index: 999;
  background: var(--brand); color: var(--ink); padding: 10px 16px;
  transition: top .2s;
}
.skip-link:focus { top: 8px; }

/* ==========================================================================
   HEADER
   ========================================================================== */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  color: #fff;
  border-bottom: 1px solid transparent;
  transition: background .45s var(--ease), color .45s var(--ease), border-color .45s var(--ease);
}
.nav[data-scrolled="true"] {
  background: rgba(248, 244, 236, .93);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  backdrop-filter: saturate(160%) blur(14px);
  color: var(--ink);
  border-bottom-color: var(--line-2);
}
.nav__inner {
  width: min(1420px, 100% - var(--gutter) * 2);
  margin-inline: auto;
  height: 78px;
  display: flex; align-items: center; justify-content: space-between; gap: 28px;
}
.brand { display: inline-flex; align-items: center; gap: 12px; }
.brand__logo { height: 46px; width: auto; display: block; }
.brand__logo--color { display: none; }
.nav[data-scrolled="true"] .brand__logo--white { display: none; }
.nav[data-scrolled="true"] .brand__logo--color { display: block; }
.brand__mark {
  width: 38px; height: auto; flex: none;
  filter: brightness(0) invert(1);
  transition: filter .45s var(--ease);
}
.brand__text { display: flex; flex-direction: column; line-height: 1.15; }
.brand__text b {
  font-family: var(--display);
  font-size: 15px; font-weight: 500; letter-spacing: .16em;
}
.brand__text i {
  font-style: normal; font-size: 9px; letter-spacing: .22em;
  opacity: .62; margin-top: 4px;
}

.nav__links { display: flex; align-items: center; gap: clamp(18px, 2.2vw, 36px); }
.nav__links a {
  position: relative; font-size: 14px; letter-spacing: .08em; padding: 6px 0;
  opacity: .82; transition: opacity .3s;
}
.nav__links a::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: 0; height: 1px;
  background: currentColor; transform: scaleX(0); transform-origin: right;
  transition: transform .45s var(--ease);
}
.nav__links a:hover, .nav__links a.is-active { opacity: 1; }
.nav__links a:hover::after, .nav__links a.is-active::after { transform: scaleX(1); transform-origin: left; }

.nav__actions { display: flex; align-items: center; gap: 18px; }
.lang {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12px; letter-spacing: .08em; opacity: .55; transition: opacity .3s;
}
.lang:hover { opacity: .9; }
.lang [data-lang-opt] { transition: opacity .3s, color .3s; opacity: .55; }
.lang__sep { opacity: .3; }
html[data-lang="zh"] .lang [data-lang-opt="zh"],
html[data-lang="en"] .lang [data-lang-opt="en"] { opacity: 1; font-weight: 600; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  border: 1px solid currentColor; font-size: 13px; letter-spacing: .1em;
  padding: 14px 26px; transition: background .4s var(--ease), color .4s var(--ease), border-color .4s var(--ease);
}
.btn svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 1.4; transition: transform .4s var(--ease); }
.btn:hover svg { transform: translateX(4px); }
.btn--solid { background: var(--brand); border-color: var(--brand); color: var(--ink); }
.btn--solid:hover { background: #fff; border-color: #fff; }
.btn--ghost { padding: 11px 20px; font-size: 12px; border-color: rgba(255, 255, 255, .35); }
.btn--ghost:hover { background: #fff; color: var(--ink); border-color: #fff; }
.nav[data-scrolled="true"] .btn--ghost { border-color: var(--line); color: var(--ink); }
.nav[data-scrolled="true"] .btn--ghost:hover { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.btn--text {
  border: 0; padding: 14px 0 12px; position: relative; font-size: 13px; color: inherit;
}
.btn--text::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: 6px; height: 1px;
  background: currentColor; opacity: .35;
}
.btn--text:hover::after { opacity: 1; }

.burger { display: none; width: 30px; height: 20px; position: relative; }
.burger span {
  position: absolute; left: 0; width: 100%; height: 1px; background: currentColor;
  transition: transform .4s var(--ease), opacity .3s;
}
.burger span:first-child { top: 4px; }
.burger span:last-child { bottom: 4px; width: 68%; }
.menu-open .burger span:first-child { transform: translateY(5px) rotate(45deg); }
.menu-open .burger span:last-child { width: 100%; transform: translateY(-6px) rotate(-45deg); }

/* mobile menu */
.menu {
  position: fixed; inset: 0; z-index: 90;
  background: var(--ink); color: var(--paper);
  transform: translateY(-100%); visibility: hidden;
  transition: transform .7s var(--ease), visibility .7s;
  display: flex; align-items: center;
  overflow-y: auto;
}
.menu.is-open { transform: none; visibility: visible; }
.menu__inner { width: min(640px, 100% - var(--gutter) * 2); margin: auto; padding: 100px 0 40px; }
.menu__links { display: flex; flex-direction: column; }
.menu__links a {
  display: flex; align-items: baseline; gap: 18px;
  padding: 14px 0; border-bottom: 1px solid rgba(255, 255, 255, .1);
}
.menu__links span { font-family: var(--display); font-size: 11px; letter-spacing: .2em; color: var(--brand); opacity: .8; }
.menu__links b { font-family: var(--serif); font-size: 26px; font-weight: 400; }
.menu__foot { display: flex; align-items: center; justify-content: space-between; margin-top: 40px; font-size: 12px; letter-spacing: .06em; }
.menu__foot a { opacity: .6; }

/* ==========================================================================
   HERO
   ========================================================================== */
.hero {
  position: relative; min-height: 100svh; background: var(--ink); color: #fff;
  display: flex; flex-direction: column; justify-content: flex-end;
  padding: 150px 0 clamp(36px, 5vw, 64px);
  overflow: hidden;
}
.hero__media { position: absolute; inset: 0 0 0 auto; width: 43%; overflow: hidden; }
.hero__media img {
  width: 100%; height: 100%; object-fit: cover; object-position: 58% 38%;
  transform: scale(1.06); will-change: transform;
}
.hero__media::after {
  content: ''; position: absolute; inset: 0;
  background:
    linear-gradient(90deg, var(--ink) 0%, rgba(20, 19, 15, .72) 26%, rgba(20, 19, 15, .05) 62%, rgba(20, 19, 15, .28) 100%),
    linear-gradient(0deg, rgba(20, 19, 15, .55) 0%, rgba(20, 19, 15, 0) 42%);
}
.hero__inner {
  position: relative; z-index: 3;
  width: min(var(--wrap), 100% - var(--gutter) * 2); margin-inline: auto;
  display: grid; grid-template-columns: repeat(12, 1fr);
}
.hero__copy { grid-column: 1 / 8; }
.eyebrow {
  display: flex; align-items: center; gap: 12px;
  font-size: 11px; letter-spacing: .24em; text-transform: uppercase;
  color: rgba(255, 255, 255, .66);
}
.eyebrow .dot { width: 5px; height: 5px; border-radius: 50%; background: var(--brand); flex: none; }
.hero__title {
  font-family: var(--serif); font-weight: 600;
  font-size: clamp(42px, 5.9vw, 88px); line-height: 1.06; letter-spacing: .01em;
  margin: clamp(22px, 3vw, 34px) 0 0;
}
.hero__title em {
  font-style: normal; color: var(--brand);
  position: relative; display: inline-block;
}
.hero__lede {
  max-width: 30em; margin-top: clamp(24px, 3vw, 36px);
  font-size: clamp(14px, 1.15vw, 16px); line-height: 2;
  color: rgba(255, 255, 255, .62);
}
.hero__actions { display: flex; align-items: center; gap: clamp(20px, 3vw, 40px); margin-top: clamp(28px, 3.5vw, 44px); flex-wrap: wrap; }
.hero__actions .btn--text { color: rgba(255, 255, 255, .8); }

.hero__stats {
  grid-column: 1 / 7;
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 18px; margin-top: clamp(44px, 7vh, 84px);
  padding-top: 22px; border-top: 1px solid rgba(255, 255, 255, .16);
}
.hero__stats dt { font-size: 11px; letter-spacing: .14em; color: rgba(255, 255, 255, .45); }
.hero__stats dd {
  margin: 8px 0 0; font-family: var(--display);
  font-size: clamp(24px, 2.6vw, 36px); line-height: 1; letter-spacing: .01em;
}
.hero__stats dd small { font-size: .5em; margin-left: 3px; color: var(--brand); }

.hero__vertical {
  position: absolute; right: 26px; top: 50%; transform: translateY(-50%);
  writing-mode: vertical-rl; font-size: 10px; letter-spacing: .42em;
  color: rgba(255, 255, 255, .32); z-index: 3;
}
.hero__scroll {
  grid-column: 1 / 7;
  display: inline-flex; align-items: center; gap: 14px;
  margin-top: clamp(30px, 4vh, 46px);
  font-size: 9px; letter-spacing: .28em;
  color: rgba(255, 255, 255, .38); width: max-content;
}
.hero__scroll i {
  display: block; width: 46px; height: 1px; position: relative;
  background: rgba(255, 255, 255, .2); overflow: hidden;
}
.hero__scroll i::after {
  content: ''; position: absolute; inset: 0; width: 16px; background: var(--brand);
  animation: scrollHint 2.6s var(--ease) infinite;
}
@keyframes scrollHint {
  0% { transform: translateX(-16px); opacity: 0; }
  35% { opacity: 1; }
  100% { transform: translateX(46px); opacity: 0; }
}

/* ==========================================================================
   SHARED SECTION PIECES
   ========================================================================== */
.section { position: relative; padding: clamp(80px, 9vw, 140px) 0; }
.section--paper { background: var(--paper); }
.section--sand { background: var(--sand); }
.section--ink { background: var(--ink); color: #fff; }

.section-head {
  display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  gap: clamp(24px, 5vw, 80px); align-items: end;
  margin-bottom: clamp(44px, 6vw, 76px);
}
.section-head__note {
  font-size: 14px; line-height: 2; color: var(--muted); max-width: 30em;
  padding-bottom: 6px;
}
.section--ink .section-head__note { color: rgba(255, 255, 255, .55); }
.section-head--center { display: block; text-align: center; }
.section-head--center .section-num { margin-bottom: 18px; }

.section-num {
  font-family: var(--display); font-size: 12px; letter-spacing: .34em;
  color: var(--gold); margin-bottom: 16px;
}
.section-num--light { color: var(--brand); }
.section-label { font-size: 15px; letter-spacing: .22em; font-weight: 600; }
.section-label-en { font-size: 10px; letter-spacing: .28em; color: var(--muted); margin-top: 8px; }

.display {
  font-family: var(--serif); font-weight: 600;
  font-size: clamp(30px, 4vw, 54px); line-height: 1.28; letter-spacing: .005em;
  text-wrap: balance;
}
.display em { font-style: normal; color: var(--gold); }
.display--light { color: #fff; }
.display--light em { color: var(--brand); }

.section-aside { position: sticky; top: 120px; align-self: start; }
.section-mark { width: 42px; height: auto; opacity: .18; margin-top: 40px; filter: grayscale(1) brightness(.4); }

.reveal { opacity: 0; transform: translateY(30px); transition: opacity 1s var(--ease), transform 1s var(--ease); }
.reveal.is-in { opacity: 1; transform: none; }

/* ==========================================================================
   ABOUT
   ========================================================================== */
.about__grid {
  display: grid; grid-template-columns: 190px minmax(0, 1fr) minmax(0, .82fr);
  gap: clamp(28px, 4.4vw, 64px); align-items: start;
}
.about__body { padding-top: 4px; }
.about__text { margin-top: clamp(28px, 3.6vw, 44px); display: grid; gap: 20px; max-width: 34em; }
.about__text p { font-size: 15px; line-height: 2.1; color: #39352D; }
.about__text p:first-child { font-size: 16px; color: var(--ink); }
.about__sign { display: flex; align-items: center; gap: 18px; margin-top: 40px; }
.about__sign-line { width: 56px; height: 1px; background: var(--gold); flex: none; }
.about__sign p { font-family: var(--display); font-size: 14px; letter-spacing: .04em; color: var(--muted); font-style: italic; }

.about__figure { margin-top: clamp(16px, 3vw, 48px); }
.about__figure img { width: 100%; aspect-ratio: 4 / 4.6; object-fit: cover; }
.about__figure figcaption {
  margin-top: 14px; font-size: 10px; letter-spacing: .2em; color: var(--muted);
}

/* ==========================================================================
   BUSINESS
   ========================================================================== */
.biz { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, .66fr); gap: clamp(28px, 4vw, 64px); }
.biz__list { border-top: 1px solid var(--line-light); }
.biz-row {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr) 34px;
  grid-template-areas: "idx main arrow" "idx desc arrow";
  column-gap: 20px; row-gap: 10px;
  padding: clamp(22px, 2.6vw, 30px) 0;
  border-bottom: 1px solid var(--line-light);
  transition: background .5s var(--ease), padding .5s var(--ease);
}
.biz-row:hover { background: rgba(255, 255, 255, .035); }
.biz-row__idx { grid-area: idx; font-family: var(--display); font-size: 12px; letter-spacing: .12em; color: var(--gold); padding-top: 8px; }
.biz-row__main { grid-area: main; }
.biz-row__main h3 { font-size: clamp(20px, 2vw, 26px); font-weight: 500; letter-spacing: .02em; }
.biz-row__en { font-size: 9px; letter-spacing: .28em; color: rgba(255, 255, 255, .38); margin-top: 9px; }
.biz-row__desc {
  grid-area: desc; font-size: 13.5px; line-height: 1.95;
  color: rgba(255, 255, 255, .5); max-width: 34em;
  transition: color .5s var(--ease);
}
.biz-row:hover .biz-row__desc, .biz-row.is-active .biz-row__desc { color: rgba(255, 255, 255, .78); }
.biz-row__arrow { grid-area: arrow; align-self: center; color: rgba(255, 255, 255, .25); transition: color .4s, transform .4s var(--ease); }
.biz-row__arrow svg { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 1.2; }
.biz-row:hover .biz-row__arrow, .biz-row.is-active .biz-row__arrow { color: var(--brand); transform: translateX(4px); }

.biz__media { position: sticky; top: 110px; aspect-ratio: 4 / 5; overflow: hidden; background: #000; }
.biz__media img {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
  opacity: 0; transform: scale(1.06);
  transition: opacity .9s var(--ease), transform 1.4s var(--ease);
}
.biz__media img.is-active { opacity: 1; transform: none; }
.biz__media-rule { position: absolute; inset: 14px; border: 1px solid rgba(255, 255, 255, .18); pointer-events: none; }

/* ==========================================================================
   TICKER
   ========================================================================== */
.ticker {
  background: var(--brand); color: var(--ink); overflow: hidden;
  border-block: 1px solid rgba(20, 19, 15, .12);
}
.ticker__track {
  display: flex; align-items: center; gap: 42px; width: max-content;
  padding: 13px 0; animation: marquee 46s linear infinite;
}
.ticker span { font-size: 12px; letter-spacing: .3em; font-weight: 600; white-space: nowrap; }
.ticker i { font-size: 7px; font-style: normal; opacity: .38; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ==========================================================================
   BRANDS
   ========================================================================== */
.flagship {
  display: grid; grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
  gap: clamp(28px, 4.6vw, 72px); align-items: center;
  margin-bottom: clamp(56px, 7vw, 104px);
}
.flagship__figure { overflow: hidden; }
.flagship__figure img { width: 100%; aspect-ratio: 4 / 4.3; object-fit: cover; transition: transform 1.6s var(--ease); }
.flagship__figure:hover img { transform: scale(1.04); }
.flagship__kicker { font-size: 10px; letter-spacing: .3em; color: var(--gold); }
.flagship__logos { display: flex; gap: 14px; margin-top: 22px; }
.flagship__logos img {
  width: 76px; height: 76px; object-fit: contain;
  transition: transform .5s var(--ease);
}
.flagship__logos img:hover { transform: translateY(-3px) scale(1.05); }
.flagship__name {
  font-family: var(--serif); font-weight: 600;
  font-size: clamp(30px, 3.6vw, 50px); line-height: 1.25; margin-top: 18px;
}
.flagship__name span { color: var(--gold); font-family: var(--display); font-size: .72em; }
.flagship__en { font-family: var(--display); font-size: 11px; letter-spacing: .24em; color: var(--muted); margin-top: 12px; }
.flagship__body > p:not(.flagship__kicker):not(.flagship__name):not(.flagship__en) {
  margin-top: 24px; font-size: 14.5px; line-height: 2.1; color: #39352D; max-width: 36em;
}
.flagship__list { margin-top: 30px; display: grid; gap: 14px; }
.flagship__list li { display: flex; gap: 18px; align-items: baseline; border-top: 1px solid var(--line-2); padding-top: 14px; }
.flagship__list b { font-family: var(--display); font-size: 15px; color: var(--gold); font-weight: 500; }
.flagship__list span { font-size: 13.5px; color: var(--muted); }

.brand-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line); border-left: 1px solid var(--line);
}
.brand-card {
  border-right: 1px solid var(--line); border-bottom: 1px solid var(--line);
  padding: 26px 24px 30px; position: relative; min-height: 268px;
  display: flex; flex-direction: column;
  transition: background .5s var(--ease), color .5s var(--ease);
}
.brand-card::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: 0; height: 2px;
  background: var(--brand); transform: scaleX(0); transform-origin: left;
  transition: transform .55s var(--ease);
}
.brand-card:hover { background: var(--ink); color: var(--paper); }
.brand-card:hover::after { transform: scaleX(1); }
.brand-card__top { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; }
.brand-card__logo {
  width: 64px; height: 64px; flex: none;
  object-fit: contain;
  transition: transform .55s var(--ease), filter .55s var(--ease);
  will-change: transform;
}
.brand-card:hover .brand-card__logo { transform: scale(1.12) rotate(-3deg); filter: drop-shadow(0 10px 18px rgba(0, 0, 0, .28)); }
.brand-card__logo--ph {
  display: grid; place-items: center; border-radius: 50%;
  border: 1px dashed rgba(20, 19, 15, .28);
  font-family: var(--serif); font-size: 26px; font-weight: 600;
  color: rgba(20, 19, 15, .34); background: transparent;
  transition: border-color .5s, color .5s, transform .55s var(--ease);
}
.brand-card:hover .brand-card__logo--ph { border-color: rgba(255, 198, 26, .55); color: var(--brand); transform: scale(1.08); }
.brand-card__idx { font-family: var(--display); font-size: 10px; letter-spacing: .2em; color: var(--gold); padding-top: 4px; }
.brand-card h4 {
  margin-top: 22px; font-size: 18px; font-weight: 600; line-height: 1.5; letter-spacing: .01em;
}
.brand-card h4 small { display: block; font-size: 10px; font-weight: 400; letter-spacing: .18em; opacity: .6; margin-top: 6px; }
.brand-card__cat { margin-top: 12px; font-size: 10.5px; letter-spacing: .14em; color: var(--muted); transition: color .5s; }
.brand-card:hover .brand-card__cat { color: var(--brand); }
.brand-card__desc { margin-top: auto; padding-top: 16px; font-size: 12.5px; line-height: 1.9; color: var(--muted); transition: color .5s; }
.brand-card:hover .brand-card__desc { color: rgba(248, 244, 236, .68); }

/* ==========================================================================
   FOOTPRINT
   ========================================================================== */
.footprint__top {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(24px, 4vw, 64px); align-items: end;
  padding-bottom: clamp(28px, 4vw, 44px); border-bottom: 1px solid var(--line);
}
.footprint__num {
  display: block; font-family: var(--display);
  font-size: clamp(84px, 12vw, 172px); line-height: .82; letter-spacing: -.02em;
}
.footprint__unit { margin-top: 18px; font-size: 13px; letter-spacing: .16em; color: var(--muted); }
.footprint__meta { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.footprint__stat b { display: block; font-family: var(--display); font-size: clamp(30px, 3.4vw, 44px); font-weight: 400; line-height: 1; }
.footprint__stat span { display: block; margin-top: 12px; font-size: 11px; letter-spacing: .12em; color: var(--muted); }

.footprint__claim {
  font-family: var(--serif); font-weight: 600;
  font-size: clamp(24px, 3.2vw, 42px); line-height: 1.4;
  margin: clamp(40px, 5vw, 64px) 0 clamp(24px, 3vw, 34px);
}
.footprint__claim em { font-style: normal; color: var(--gold); }

.province-list { display: flex; flex-wrap: wrap; gap: 10px; }
.province-list li {
  border: 1px solid var(--line); border-radius: 999px;
  padding: 9px 20px; font-size: 12.5px; letter-spacing: .1em;
  transition: background .4s var(--ease), color .4s var(--ease), border-color .4s var(--ease);
}
.province-list li:hover { background: var(--ink); color: var(--paper); border-color: var(--ink); }

.footprint__strip {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px;
  margin-top: clamp(44px, 6vw, 72px);
}
.footprint__strip img { width: 100%; aspect-ratio: 1 / 1.05; object-fit: cover; filter: saturate(.92); transition: filter .6s, transform 1.2s var(--ease); }
.footprint__strip img:hover { filter: saturate(1.05); transform: translateY(-4px); }

/* ==========================================================================
   MILESTONES
   ========================================================================== */
.timeline {
  display: grid; grid-template-columns: repeat(6, 1fr); gap: clamp(16px, 2vw, 30px);
  position: relative; margin-top: 20px;
}
.timeline::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: rgba(255, 255, 255, .18);
}
.timeline li { position: relative; padding-top: 34px; }
.timeline li::before {
  content: ''; position: absolute; top: -3.5px; left: 0; width: 7px; height: 7px;
  border-radius: 50%; background: var(--brand);
}
.timeline__year { font-family: var(--display); font-size: clamp(26px, 2.6vw, 34px); letter-spacing: .02em; }
.timeline h3 { margin: 16px 0 10px; font-size: 15px; font-weight: 500; letter-spacing: .06em; }
.timeline p { font-size: 12.5px; line-height: 1.95; color: rgba(255, 255, 255, .48); }

/* ==========================================================================
   HONORS
   ========================================================================== */
.honors__grid {
  display: grid; grid-template-columns: 200px minmax(0, 1fr);
  gap: clamp(28px, 4.4vw, 72px); align-items: start;
}
.honors__badge {
  margin-top: 44px; font-size: 13px; line-height: 1.8; letter-spacing: .08em;
  color: var(--muted); border-left: 2px solid var(--gold); padding-left: 16px;
}
.honors__badge b { color: var(--ink); font-weight: 600; }
.honor-list { margin-top: clamp(24px, 3vw, 40px); border-top: 1px solid var(--line); }
.honor-list li {
  display: grid; grid-template-columns: 88px minmax(0, 1fr);
  column-gap: 24px; padding: 22px 0; border-bottom: 1px solid var(--line);
  align-items: baseline;
}
.honor-list span { font-family: var(--display); font-size: 12px; letter-spacing: .12em; color: var(--gold); }
.honor-list b { font-size: 16px; font-weight: 500; line-height: 1.7; }
.honor-list i { display: block; grid-column: 2; margin-top: 6px; font-style: normal; font-size: 9px; letter-spacing: .18em; color: var(--muted); }

/* ==========================================================================
   CULTURE
   ========================================================================== */
.values {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: clamp(20px, 3vw, 40px);
  margin-bottom: clamp(56px, 7vw, 100px);
}
.value { border-top: 1px solid var(--line); padding-top: 24px; }
.value > span { font-family: var(--display); font-size: 11px; letter-spacing: .2em; color: var(--gold); }
.value h3 { margin: 22px 0 12px; font-size: 17px; font-weight: 600; letter-spacing: .06em; }
.value p { font-size: 13.5px; line-height: 2; color: var(--muted); }

.founder {
  display: grid; grid-template-columns: minmax(0, .62fr) minmax(0, 1fr);
  gap: clamp(28px, 4.6vw, 72px); align-items: start;
  border-top: 1px solid var(--line); padding-top: clamp(36px, 5vw, 64px);
}
.founder__figure { overflow: hidden; background: #ddd; }
.founder__figure img { width: 100%; aspect-ratio: 4 / 4.5; object-fit: cover; object-position: 50% 22%; transition: transform 1.4s var(--ease); }
.founder__figure:hover img { transform: scale(1.03); }
.founder__kicker { font-size: 10px; letter-spacing: .3em; color: var(--gold); }
.founder__name { font-family: var(--serif); font-size: clamp(28px, 3vw, 40px); font-weight: 600; margin-top: 16px; }
.founder__name small { font-family: var(--display); font-size: .42em; letter-spacing: .2em; color: var(--muted); margin-left: 10px; }
.founder blockquote { margin-top: 26px; border-left: 2px solid var(--brand); padding-left: 22px; }
.founder blockquote p { font-family: var(--serif); font-size: clamp(18px, 2vw, 24px); line-height: 1.75; }
.founder__roles {
  margin-top: 30px; display: grid; grid-template-columns: 1fr 1fr; gap: 2px 32px;
}
.founder__roles li {
  font-size: 12.5px; line-height: 1.9; color: var(--muted);
  padding: 9px 0; border-bottom: 1px solid var(--line-2);
}

/* ==========================================================================
   PARTNERS
   ========================================================================== */
.partner-group { margin-bottom: clamp(36px, 4.5vw, 64px); }
.partner-group__title {
  display: flex; align-items: baseline; gap: 16px;
  font-size: 14px; font-weight: 600; letter-spacing: .12em; margin-bottom: 20px;
}
.partner-group__title i { font-style: normal; font-size: 9px; letter-spacing: .26em; color: var(--muted); font-weight: 400; }
.partner-list {
  display: grid; grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line); border-left: 1px solid var(--line);
}
.partner-list li {
  border-right: 1px solid var(--line); border-bottom: 1px solid var(--line);
  padding: 20px 22px; font-size: 14px; letter-spacing: .06em;
  display: flex; align-items: center; min-height: 66px;
  transition: background .4s var(--ease), color .4s var(--ease);
}
.partner-list li:hover { background: var(--ink); color: var(--paper); }
.partner-list--wide { grid-template-columns: repeat(7, 1fr); }
.partner-list--wide li { padding: 20px 14px; }

/* logo wall */
.partner-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line); border-left: 1px solid var(--line);
}
.partner-grid li {
  border-right: 1px solid var(--line); border-bottom: 1px solid var(--line);
  min-height: 116px; padding: 26px 30px;
  display: grid; place-items: center;
  transition: background .45s var(--ease);
}
.partner-grid img {
  max-width: 100%; max-height: 56px; width: auto; height: auto;
  object-fit: contain;
  mix-blend-mode: multiply;
  filter: grayscale(1) contrast(1.12) opacity(.74);
  transition: filter .5s var(--ease), transform .5s var(--ease);
}
.partner-grid li:hover { background: rgba(20, 19, 15, .035); }
.partner-grid li:hover img { filter: none; transform: scale(1.06); }
.partner-grid--wide { grid-template-columns: repeat(7, 1fr); }
.partner-grid--wide li { min-height: 104px; padding: 22px 18px; }
.partner-grid--wide img { max-height: 46px; }

/* ==========================================================================
   CONTACT
   ========================================================================== */
.contact { overflow: hidden; }
.contact__wrap {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.02fr);
  gap: clamp(40px, 6vw, 96px); align-items: start;
}
.eyebrow--light { color: rgba(255, 255, 255, .6); margin-bottom: 24px; }
.contact__lead .display { margin-bottom: 0; }
.contact__mail {
  display: inline-block; margin-top: clamp(30px, 4vw, 46px);
  font-family: var(--display); font-size: clamp(20px, 2.2vw, 30px); letter-spacing: .01em;
  border-bottom: 1px solid rgba(255, 255, 255, .28); padding-bottom: 6px;
  transition: color .3s, border-color .3s;
}
.contact__mail:hover { color: var(--brand); border-color: var(--brand); }
.contact__addr { margin-top: 22px; font-size: 12.5px; line-height: 2; color: rgba(255, 255, 255, .42); }

.contact__topics { display: grid; }
.contact__topics article {
  display: grid; grid-template-columns: 46px minmax(0, 1fr);
  column-gap: 20px; row-gap: 8px;
  padding: 24px 0; border-top: 1px solid var(--line-light);
}
.contact__topics article:last-child { border-bottom: 1px solid var(--line-light); }
.contact__topics span { grid-row: 1 / 3; font-family: var(--display); font-size: 11px; letter-spacing: .16em; color: var(--gold); padding-top: 4px; }
.contact__topics h3 { font-size: 16px; font-weight: 500; letter-spacing: .08em; }
.contact__topics p { font-size: 13px; line-height: 1.95; color: rgba(255, 255, 255, .5); max-width: 30em; }

/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer { background: #0D0C09; color: rgba(255, 255, 255, .55); padding: clamp(48px, 6vw, 76px) 0 32px; }
.footer__inner {
  display: grid; grid-template-columns: minmax(0, 1.2fr) auto;
  gap: 40px clamp(28px, 6vw, 80px); align-items: start;
}
.brand--footer { color: #fff; }
.brand--footer .brand__logo { height: 48px; width: auto; }
.brand--footer .brand__text i { opacity: .5; }
.footer__slogan { margin-top: 24px; font-family: var(--serif); font-size: 14px; letter-spacing: .08em; color: rgba(255, 255, 255, .45); }
.footer__nav { display: flex; flex-wrap: wrap; gap: 10px 28px; font-size: 12px; letter-spacing: .1em; }
.footer__nav a { transition: color .3s; }
.footer__nav a:hover { color: var(--brand); }
.footer__meta {
  grid-column: 1 / -1; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 10px 24px;
  margin-top: clamp(28px, 4vw, 48px); padding-top: 24px; border-top: 1px solid rgba(255, 255, 255, .1);
  font-size: 11px; letter-spacing: .06em; color: rgba(255, 255, 255, .35);
}

.to-top {
  position: fixed; right: 22px; bottom: 22px; z-index: 80;
  width: 46px; height: 46px; border-radius: 50%;
  background: var(--ink); color: var(--paper);
  display: grid; place-items: center;
  opacity: 0; pointer-events: none; transform: translateY(10px);
  transition: opacity .4s, transform .4s var(--ease), background .3s;
}
.to-top.is-on { opacity: 1; pointer-events: auto; transform: none; }
.to-top:hover { background: var(--brand); color: var(--ink); }
.to-top svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.4; }

/* ==========================================================================
   LANGUAGE-SPECIFIC TYPOGRAPHY
   Latin display text uses Playfair; Chinese keeps the Song-style serif.
   ========================================================================== */
html[data-lang="en"] .hero__title,
html[data-lang="en"] .display,
html[data-lang="en"] .flagship__name,
html[data-lang="en"] .founder__name,
html[data-lang="en"] .about__sign p,
html[data-lang="en"] .footer__slogan { font-family: var(--display); font-weight: 400; }
html[data-lang="en"] .hero__title { font-size: clamp(34px, 4.5vw, 66px); line-height: 1.08; letter-spacing: -.012em; }
html[data-lang="en"] .display { font-size: clamp(28px, 3.5vw, 48px); line-height: 1.2; letter-spacing: -.005em; }
html[data-lang="en"] .flagship__name { font-size: clamp(28px, 3.2vw, 44px); }
html[data-lang="en"] .section-label { letter-spacing: .16em; font-size: 13px; }
html[data-lang="en"] .hero__lede { max-width: 33em; line-height: 1.85; }
html[data-lang="en"] .brand__text b { letter-spacing: .13em; }
html[data-lang="en"] .hero__title em { letter-spacing: -.01em; }

/* first-paint entrance for the hero */
@keyframes rise {
  from { opacity: 0; transform: translateY(26px); }
  to { opacity: 1; transform: none; }
}
.hero__copy > * { animation: rise 1.05s var(--ease) both; }
.hero__copy > *:nth-child(1) { animation-delay: .08s; }
.hero__copy > *:nth-child(2) { animation-delay: .16s; }
.hero__copy > *:nth-child(3) { animation-delay: .28s; }
.hero__copy > *:nth-child(4) { animation-delay: .38s; }
.hero__stats { animation: rise 1.05s var(--ease) .5s both; }
.hero__scroll { animation: rise 1s var(--ease) .7s both; }

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */
@media (max-width: 1180px) {
  .nav__links { gap: 18px; }
  .nav__links a { font-size: 13px; }
  .brand__logo { height: 42px; }
  .about__grid { grid-template-columns: 150px minmax(0, 1fr) minmax(0, .8fr); }
  .partner-grid--wide { grid-template-columns: repeat(4, 1fr); }
}

@media (max-width: 1024px) {
  .nav__links, .nav__cta { display: none; }
  .burger { display: block; }
  .nav__inner { height: 70px; }

  .hero__media { width: 62%; }
  .hero__copy { grid-column: 1 / -1; }
  .hero__stats { grid-column: 1 / -1; grid-template-columns: repeat(2, 1fr); max-width: 520px; gap: 22px 18px; }
  .hero__vertical { display: none; }
  .hero__title { font-size: clamp(42px, 8vw, 76px); }

  .section-head { grid-template-columns: 1fr; align-items: start; }
  .section-head__note { padding-bottom: 0; }

  .about__grid { grid-template-columns: 1fr; }
  .section-aside { position: static; display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
  .section-aside .section-num { margin-bottom: 0; }
  .section-aside .section-label-en { margin-top: 0; }
  .section-mark { display: none; }
  .about__figure { margin-top: 36px; }
  .about__figure img { aspect-ratio: 16 / 10; }

  .biz { grid-template-columns: 1fr; }
  .biz__media { display: none; }

  .flagship { grid-template-columns: 1fr; }
  .flagship__figure img { aspect-ratio: 16 / 10; }

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

  .footprint__top { grid-template-columns: 1fr; }
  .footprint__strip { grid-template-columns: repeat(2, 1fr); }

  .timeline { grid-template-columns: repeat(3, 1fr); row-gap: 40px; }
  .timeline::before { display: none; }
  .timeline li { padding-top: 26px; border-top: 1px solid rgba(255, 255, 255, .16); }
  .timeline li::before { top: -3.5px; }

  .honors__grid { grid-template-columns: 1fr; }
  .honors__badge { margin-top: 0; margin-bottom: 8px; }

  .values { grid-template-columns: repeat(2, 1fr); row-gap: 36px; }
  .founder { grid-template-columns: minmax(0, .7fr) minmax(0, 1fr); }

  .partner-list { grid-template-columns: repeat(3, 1fr); }
  .partner-grid { grid-template-columns: repeat(3, 1fr); }
  .partner-grid--wide { grid-template-columns: repeat(4, 1fr); }
  .contact__wrap { grid-template-columns: 1fr; gap: 48px; }
}

@media (max-width: 720px) {
  :root { --gutter: 22px; }
  .nav__inner { height: 68px; }
  .brand__logo { height: 36px; }
  .brand__text b { font-size: 13px; }
  .brand__text i { font-size: 8px; letter-spacing: .16em; }
  .brand__mark { width: 30px; }

  .hero { min-height: 100svh; padding: 104px 0 40px; justify-content: center; }
  .hero__media { width: 100%; inset: 0; }
  .hero__media img { object-position: 58% 34%; }
  .hero__media::after {
    background:
      linear-gradient(180deg, rgba(20, 19, 15, .82) 0%, rgba(20, 19, 15, .42) 34%, rgba(20, 19, 15, .86) 76%, var(--ink) 100%);
  }
  .hero__media-caption { display: none; }
  .hero__title { font-size: clamp(38px, 11.4vw, 60px); }
  .hero__lede { font-size: 13.5px; line-height: 1.95; }
  .hero__stats { grid-template-columns: repeat(2, 1fr); gap: 20px 16px; margin-top: 40px; }
  .hero__stats dd { font-size: 26px; }
  .hero__scroll { display: none; }
  .hero__actions { gap: 22px; }
  .btn { padding: 13px 22px; }

  .section { padding: 64px 0; }
  .display { font-size: clamp(26px, 7.4vw, 36px); }
  .about__text p { font-size: 14px; line-height: 2; }
  .about__text p:first-child { font-size: 15px; }
  .about__figure img { aspect-ratio: 4 / 4.4; }

  .biz-row { grid-template-columns: 40px minmax(0, 1fr); grid-template-areas: "idx main" "idx desc"; }
  .biz-row__arrow { display: none; }
  .biz-row__desc { font-size: 13px; }

  .ticker__track { gap: 26px; }
  .ticker span { font-size: 10.5px; letter-spacing: .22em; }

  .brand-grid { grid-template-columns: 1fr; }
  .brand-card { min-height: 0; padding: 22px 20px 24px; }
  .brand-card__logo { width: 54px; height: 54px; }
  .brand-card__logo--ph { font-size: 22px; }
  .brand-card h4 { margin-top: 16px; }
  .brand-card__desc { padding-top: 12px; }

  .footprint__meta { grid-template-columns: repeat(3, 1fr); gap: 14px; }
  .footprint__stat span { font-size: 10px; letter-spacing: .06em; }
  .footprint__strip { gap: 6px; }
  .province-list li { padding: 8px 15px; font-size: 12px; }

  .timeline { grid-template-columns: 1fr; row-gap: 0; }
  .timeline li { padding: 22px 0 22px 0; border-top: 1px solid rgba(255, 255, 255, .14); }
  .timeline li::before { display: none; }
  .timeline p { font-size: 12.5px; }

  .values { grid-template-columns: 1fr; row-gap: 0; }
  .value { padding: 22px 0; border-top: 1px solid var(--line); }
  .value h3 { margin: 12px 0 8px; }

  .founder { grid-template-columns: 1fr; }
  .founder__figure img { aspect-ratio: 4 / 4.2; }
  .founder__roles { grid-template-columns: 1fr; }

  .partner-list { grid-template-columns: repeat(2, 1fr); }
  .partner-list li { padding: 15px 16px; font-size: 13px; min-height: 56px; }
  .partner-grid, .partner-grid--wide { grid-template-columns: repeat(2, 1fr); }
  .partner-grid li { min-height: 94px; padding: 18px 20px; }
  .partner-grid img { max-height: 40px; }
  .partner-grid--wide li { min-height: 86px; }

  .contact__wrap { grid-template-columns: 1fr; gap: 36px; }
  .contact__topics article { padding: 20px 0; }

  .footer__inner { grid-template-columns: 1fr; }
  .brand--footer .brand__logo { height: 38px; }
  .footer__nav { margin-top: 8px; }
  .to-top { right: 14px; bottom: 14px; width: 40px; height: 40px; }
}

/* ---------- motion & print ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}

@media print {
  .nav, .menu, .to-top, .hero__scroll, .ticker { display: none !important; }
  body { background: #fff; }
  .section { padding: 24px 0; }
}