/* =========================================================================
   ErosolarAI — 丰碑 · THE STELE
   A sovereign monument. Restraint is the flex.
   No build step. Vanilla CSS. Fully legible without JavaScript.
   ========================================================================= */

:root {
  /* Palette ---------------------------------------------------------- */
  /* PLA-flag theme: red field + gold star */
  --mono-black: #0A0406;   /* the unlit stone — red-black */
  --nocturne:   #240709;   /* elevated surfaces — deep red */
  --gilt:       #E3B23A;   /* gold (PLA-flag gold): inscription, rules, spine */
  --gilt-soft:  #C79A39;
  --ivory:      #F3ECD9;   /* fully-lit reading text */
  --cinnabar:   #EE1C25;   /* PLA red — the seal */
  --coral:      #FF5747;   /* the one ceremonial warmth */
  --mist:       #9C8E86;   /* sub-inscription, engraved/dim (warm gray) */
  --hairline:   #3F1417;   /* borders, grid, seam track (dark red) */
  --pla-red:    #EE1C25;   /* 中国人民解放军军旗 — flag red */
  --pla-gold:   #FFDE00;   /* flag gold */

  /* Type ------------------------------------------------------------- */
  --f-display: "Cinzel", "Times New Roman", serif;
  --f-body:    "Cormorant Garamond", Georgia, "Times New Roman", serif;
  --f-mono:    "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  --f-zh:      "Noto Serif SC", "Songti SC", "STSong", serif;

  /* A blurred low-quality placeholder for the hero, inlined */
  --lqip: url("data:image/webp;base64,UklGRtgAAABXRUJQVlA4IMwAAABwBQCdASoYACAAPu1oqk+ppaOiKA1RMB2JZACdM0xGz4u/jLTj5xDj95Gkl7BqQghiRXgAAP7aUe992gpM1G4tXyFqngi+/d4/01isdDbJZ1OspNW7QI3quQd14aGlS8jZikuKz0NNaSye94PMXqyBMYwcP+HWJJfQRgx7/tC3wGffdRPota21p+jb2RsoM71GZP2WIfY3uIpcBYI8TPE5edoA1S7n2OtrxEFnjmQ/y0TAvQJTy3kApDj5XY8aflibpt3V0roGNSZIAAA==");

  --ease-settle: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-thud:   cubic-bezier(0.7, 0, 0.3, 1);
}

/* Reset ------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--mono-black);
  color: var(--ivory);
  font-family: var(--f-body);
  font-size: clamp(1.05rem, 1.2vw, 1.25rem);
  line-height: 1.6;
  letter-spacing: .005em;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
:lang(zh-Hans) { font-family: var(--f-zh); line-height: 1.8; }
img, picture, canvas { display: block; max-width: 100%; }
a { color: inherit; }
h1, h2, h3, p, dl, dd, blockquote, figure { margin: 0; }

/* Utilities --------------------------------------------------------- */
.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: -200px; left: 50%; transform: translateX(-50%);
  z-index: 999; background: var(--nocturne); color: var(--ivory);
  border: 1px solid var(--gilt); padding: .7rem 1.2rem; border-radius: 2px;
  font-family: var(--f-mono); font-size: .8rem; letter-spacing: .08em;
  transition: top .3s var(--ease-settle);
}
.skip-link:focus { top: 1rem; }

:focus-visible {
  outline: 2px solid var(--gilt);
  outline-offset: 3px;
  border-radius: 1px;
}

/* Scroll-reveal -- default visible (no-JS safe); JS may add .reveal-armed */
.reveal { opacity: 1; transform: none; }
.reveal-armed .reveal {
  opacity: 0;
  transform: translateY(34px);
  transition: opacity 1.4s var(--ease-settle), transform 1.4s var(--ease-settle);
}
.reveal-armed .reveal.in { opacity: 1; transform: none; }

/* ============================ Language switch ============================ */
.lang-switch {
  position: fixed; top: 1.1rem; right: 1.2rem; z-index: 50;
  display: flex; align-items: center; gap: .5rem;
  font-family: var(--f-mono); font-size: .72rem; letter-spacing: .12em;
  background: color-mix(in oklab, var(--mono-black) 72%, transparent);
  backdrop-filter: blur(8px);
  border: 1px solid var(--hairline); border-radius: 999px;
  padding: .42rem .85rem;
}
.lang-switch--foot {
  position: static; margin: 2rem auto 0; width: max-content;
  background: none; backdrop-filter: none;
}
.lang-btn {
  background: none; border: 0; color: var(--mist); cursor: pointer;
  font: inherit; letter-spacing: inherit;
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 28px; min-width: 28px; padding: .35rem .5rem;
  transition: color .5s var(--ease-settle);
}
.lang-btn[aria-pressed="true"] { color: var(--gilt); }
.lang-btn:hover { color: var(--ivory); }
.lang-sep { color: var(--hairline); }

/* ============================ 序 · THE APPROACH ============================ */
.approach {
  position: relative; min-height: 100svh; overflow: hidden;
  display: grid; place-items: center; text-align: center;
  isolation: isolate;
}
.approach__sky {
  position: absolute; inset: 0; z-index: -2;
  background:
    radial-gradient(120% 80% at 18% 88%, rgba(238,28,37,.34), transparent 46%),
    radial-gradient(120% 90% at 78% 96%, rgba(255,222,0,.10), transparent 40%),
    linear-gradient(180deg, #0a0204 0%, #2a0709 45%, #3e0a0d 72%, #0a0204 100%);
}
.approach__crown {
  position: absolute; inset: 0; z-index: -1;
  display: block;
}
/* Scrim: darken the centre so the live wordmark reads cleanly over the
   manifesto already inscribed on the building, which recedes to texture. */
.approach::after {
  content: ""; position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background: radial-gradient(78% 44% at 50% 50%, rgba(7,7,12,.9) 0%, rgba(7,7,12,.66) 36%, rgba(7,7,12,0) 72%);
}
.approach__crown img {
  width: 100%; height: 100%; object-fit: cover; object-position: 50% 6%;
  opacity: .8;
  -webkit-mask-image: linear-gradient(180deg, transparent 0, #000 14%, #000 52%, transparent 84%);
          mask-image: linear-gradient(180deg, transparent 0, #000 14%, #000 52%, transparent 84%);
  animation: crown-rise 2.6s var(--ease-settle) both;
}
@keyframes crown-rise { from { opacity: 0; transform: scale(1.06); } to { opacity: .9; transform: scale(1); } }

.approach__plate { position: relative; z-index: 1; padding: 1.5rem; transform: translateY(8vh); }
.wordmark { line-height: 1; }
.wordmark__en {
  display: block; font-family: var(--f-display); font-weight: 700;
  font-size: clamp(1.4rem, 8vw, 7rem); letter-spacing: .12em;
  color: var(--ivory); text-indent: .12em; white-space: nowrap;
  text-shadow: 0 0 36px rgba(198,160,82,.32);
  animation: ignite-in 2.2s .5s var(--ease-settle) both;
}
.wordmark__zh {
  display: block; font-family: var(--f-zh); font-weight: 900;
  font-size: clamp(1.6rem, 5.5vw, 4rem); letter-spacing: .35em; text-indent: .35em;
  color: var(--gilt); margin-top: .35rem;
  animation: ignite-in 2.2s .9s var(--ease-settle) both;
}
@keyframes ignite-in { from { opacity: 0; filter: blur(6px); } to { opacity: 1; filter: blur(0); } }

.approach__tag {
  margin-top: 2.2rem; animation: ignite-in 2.2s 1.4s var(--ease-settle) both;
}
.approach__tag > span { display: block; }
.approach__tag [lang="zh-Hans"] {
  font-family: var(--f-zh); letter-spacing: .5em; text-indent: .5em;
  color: var(--gilt-soft); font-size: clamp(.9rem, 2.4vw, 1.3rem);
}
.approach__tag-en {
  font-family: var(--f-mono); font-size: .72rem; letter-spacing: .42em;
  text-indent: .42em; color: var(--mist); margin-top: .7rem; text-transform: uppercase;
}

.descend {
  position: absolute; bottom: 2.2rem; left: 50%; transform: translateX(-50%);
  z-index: 1; text-decoration: none; color: var(--gilt);
  font-family: var(--f-zh); font-size: 1.1rem; letter-spacing: .2em;
  display: grid; justify-items: center; gap: .7rem; opacity: .85;
  animation: breathe 6s ease-in-out infinite;
}
.descend__tick { width: 1px; height: 46px; background: linear-gradient(var(--gilt), transparent); }
@keyframes breathe { 0%,100% { opacity: .55; } 50% { opacity: 1; } }

/* Hero download CTA — the Helia browser, offered at the top of the monument. */
.hero-dl {
  display: inline-grid; justify-items: center; gap: .45rem;
  margin-top: clamp(1.8rem, 4vw, 2.6rem); padding: .95rem 2rem;
  text-decoration: none; color: var(--ivory);
  border: 1px solid var(--gilt); border-radius: 999px;
  background: color-mix(in oklab, var(--mono-black) 52%, transparent);
  backdrop-filter: blur(8px);
  transition: background .5s var(--ease-settle), transform .5s var(--ease-settle), box-shadow .5s var(--ease-settle);
  animation: ignite-in 2.2s 1.8s var(--ease-settle) both;
}
.hero-dl:hover {
  background: color-mix(in oklab, var(--gilt) 16%, var(--mono-black));
  transform: translateY(-2px);
  box-shadow: 0 14px 44px -18px rgba(198,160,82,.65);
}
.hero-dl:focus-visible { outline: 2px solid var(--gilt); outline-offset: 4px; }
.hero-dl__label { display: grid; gap: .12rem; }
.hero-dl__label [lang="zh-Hans"] { font-family: var(--f-zh); font-weight: 500; font-size: clamp(1rem, 2.6vw, 1.25rem); letter-spacing: .12em; color: var(--gilt); }
.hero-dl__label [lang="en"] { font-family: var(--f-display); font-size: clamp(.68rem, 1.8vw, .82rem); letter-spacing: .22em; text-transform: uppercase; color: var(--ivory); }
.hero-dl__meta { font-family: var(--f-mono); font-size: .56rem; letter-spacing: .1em; color: var(--mist); text-transform: uppercase; }
.hero-dl__alt {
  display: block; margin-top: .9rem; text-decoration: underline;
  text-decoration-color: var(--hairline); text-underline-offset: 4px;
  font-family: var(--f-mono); font-size: .62rem; letter-spacing: .14em; text-transform: uppercase; color: var(--mist);
  animation: ignite-in 2.2s 2s var(--ease-settle) both;
}
.hero-dl__alt:hover { color: var(--gilt); }

/* ============================ Chamber titles ============================ */
.chamber-title { text-align: center; margin-bottom: clamp(2rem, 6vw, 4.5rem); line-height: 1; }
.chamber-title__zh {
  display: block; font-family: var(--f-zh); font-weight: 900;
  font-size: clamp(2.2rem, 8vw, 5rem); letter-spacing: .28em; text-indent: .28em;
  color: var(--gilt);
}
.chamber-title__en {
  display: block; font-family: var(--f-display); font-weight: 400;
  font-size: clamp(.8rem, 2.4vw, 1.15rem); letter-spacing: .42em; text-indent: .42em;
  text-transform: uppercase; color: var(--mist); margin-top: 1.1rem;
}
.chamber-title--light .chamber-title__en { color: var(--mist); }

/* ============================ 题献 · THE DEDICATION ============================ */
.dedication {
  padding: clamp(5rem, 14vw, 11rem) 6vw clamp(4rem, 10vw, 8rem);
  background:
    radial-gradient(80% 50% at 50% 0%, rgba(42,7,9,.6), transparent 70%),
    var(--mono-black);
}
.facade {
  position: relative; width: min(92vw, 520px); aspect-ratio: 1086 / 1448;
  margin: 0 auto; border: 1px solid var(--hairline);
  background-image: var(--lqip); background-size: cover; background-position: center;
  box-shadow: 0 40px 120px -40px rgba(0,0,0,.9), inset 0 0 120px rgba(0,0,0,.6);
  overflow: hidden; touch-action: pan-y;
}
.facade__img, .facade__img img { position: absolute; inset: 0; width: 100%; height: 100%; }
.facade__img img { object-fit: cover; opacity: .82; }
.facade::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(180deg, rgba(7,7,12,.1) 0%, rgba(7,7,12,.05) 40%, rgba(7,7,12,.85) 100%);
}

.cartouche {
  position: absolute; left: 0; right: 0; top: 8%; z-index: 2;
  display: grid; justify-items: center; gap: .35rem; padding: 0 6%;
  text-align: center; text-shadow: 0 2px 18px rgba(0,0,0,.85);
  will-change: clip-path;
}
.cartouche__name {
  font-family: var(--f-display); font-weight: 700; color: var(--ivory);
  font-size: clamp(1.1rem, 4.4vw, 1.9rem); letter-spacing: .12em;
}
.cartouche--zh .cartouche__name { font-family: var(--f-zh); font-weight: 900; color: var(--gilt); letter-spacing: .22em; }
.cartouche__line { font-family: var(--f-mono); font-size: clamp(.6rem, 2vw, .78rem); letter-spacing: .2em; color: var(--gilt-soft); }
.cartouche--zh .cartouche__line { font-family: var(--f-zh); letter-spacing: .14em; }
.cartouche__rule { width: 42%; height: 1px; background: var(--gilt); opacity: .7; margin-top: .4rem; }
.cartouche--en { clip-path: inset(0 calc(100% - var(--seam, 50%)) 0 0); }
.cartouche--zh { clip-path: inset(0 0 0 var(--seam, 50%)); }

.seam {
  position: absolute; top: 0; bottom: 0; left: var(--seam, 50%); z-index: 3;
  width: 2px; margin-left: -1px; background: var(--gilt);
  box-shadow: 0 0 16px rgba(198,160,82,.6);
  cursor: ew-resize; touch-action: none;
}
.seam__handle {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  color: var(--gilt); font-size: 1.1rem; line-height: 1;
  width: 40px; height: 40px; display: grid; place-items: center;
  background: color-mix(in oklab, var(--mono-black) 78%, transparent);
  border: 1px solid var(--gilt); border-radius: 50%;
  text-shadow: 0 0 10px rgba(198,160,82,.8);
}
.seam:focus-visible { outline: none; }
.seam:focus-visible .seam__handle { outline: 2px solid var(--ivory); outline-offset: 3px; }

.doctrine {
  max-width: 40ch; margin: clamp(2.5rem, 7vw, 4.5rem) auto 0; text-align: center;
}
.doctrine > span { display: block; }
.doctrine__en { font-family: var(--f-display); font-size: clamp(.95rem, 2.6vw, 1.3rem); letter-spacing: .14em; color: var(--ivory); text-transform: uppercase; }
.doctrine__zh { font-family: var(--f-zh); font-size: clamp(.9rem, 2.2vw, 1.1rem); color: var(--mist); margin-top: 1rem; }

/* ============================ 碑文 · THE INSCRIPTION ============================ */
/* isolation:isolate contains the sticky background's stacking context so it
   can never bleed into the chambers that follow. */
.inscription { position: relative; background: var(--mono-black); isolation: isolate; }
.inscription__bg {
  position: sticky; top: 0; height: 100vh; height: 100svh; margin-bottom: -100vh; margin-bottom: -100svh;
  z-index: 0; overflow: hidden;
  background-image: var(--lqip); background-size: cover; background-position: center;
}
.inscription__img {
  width: 100%; height: 132%; object-fit: cover; object-position: 50% 30%;
  opacity: .42; transform: translateY(0); will-change: transform;
}
.inscription__vignette {
  position: absolute; inset: 0;
  background:
    radial-gradient(120% 70% at 50% 40%, transparent 30%, rgba(7,7,12,.55) 78%),
    linear-gradient(180deg, rgba(7,7,12,.7) 0%, rgba(7,7,12,.25) 30%, rgba(7,7,12,.35) 70%, rgba(7,7,12,.85) 100%);
}
.ember { position: absolute; inset: 0; width: 100%; height: 100%; mix-blend-mode: screen; opacity: 0; transition: opacity 2s var(--ease-settle); }
.ember.on { opacity: .55; }

.inscription__text {
  position: relative; z-index: 1;
  max-width: 64ch; margin: 0 auto; padding: 56vh 7vw 60vh;
}
.inscription__head { text-align: center; margin-bottom: 18vh; }
.inscription__sub { font-family: var(--f-body); font-style: italic; color: var(--mist); font-size: 1.1rem; }

/* The plumb-line spine + floor markers */
.manifesto { position: relative; }
.manifesto::before {
  content: ""; position: absolute; left: -2.4rem; top: 0; bottom: 0; width: 1px;
  background: linear-gradient(180deg, transparent, var(--gilt) 12%, var(--gilt) 88%, transparent);
  opacity: .5;
}
.movement { position: relative; margin: 0 0 30vh; }
.movement:last-child { margin-bottom: 6vh; }
.movement::before {
  content: attr(data-marker); position: absolute; left: -2.4rem; top: -2.4rem;
  transform: translateX(-100%) translateX(-.8rem);
  font-family: var(--f-mono); font-size: .66rem; letter-spacing: .14em;
  color: var(--gilt-soft); white-space: nowrap; opacity: .8;
}
.movement::after {
  content: attr(data-elev); position: absolute; left: -2.4rem; bottom: 0;
  transform: translateX(-100%) translateX(-.8rem);
  font-family: var(--f-mono); font-size: .62rem; letter-spacing: .1em;
  color: var(--mist); white-space: nowrap; opacity: .6;
}

.salutation {
  font-family: var(--f-display); font-weight: 700;
  font-size: clamp(1.8rem, 7vw, 4.6rem); letter-spacing: .1em; color: var(--ivory);
  display: flex; align-items: baseline; flex-wrap: wrap; gap: .5em;
  margin-bottom: 1.6rem; text-shadow: 0 0 30px rgba(198,160,82,.25);
}
.salutation--quiet { font-size: clamp(1.1rem, 4vw, 2rem); letter-spacing: .22em; color: var(--gilt); }
.salutation__zh { font-family: var(--f-zh); font-weight: 500; font-size: .42em; letter-spacing: .1em; color: var(--mist); }
.seal-mark {
  width: .62em; height: .62em; align-self: center; border: 2px solid var(--cinnabar);
  background: color-mix(in oklab, var(--cinnabar) 22%, transparent);
  transform: rotate(45deg) scale(.4); opacity: 0;
  transition: opacity .6s var(--ease-settle), transform .6s var(--ease-thud);
}
.movement.lit .seal-mark { opacity: .9; transform: rotate(45deg) scale(1); }

.inscribed { margin: 0; }
.line {
  font-family: var(--f-body); font-weight: 500;
  font-size: clamp(1.35rem, 2.4vw, 2rem); line-height: 1.55;
  color: var(--ivory); margin: 0 0 .5em; position: relative;
  text-shadow: 0 0 24px rgba(198,160,82,.22);
}
.line b { font-weight: 600; color: var(--gilt); font-style: normal; }
.line--zh { font-family: var(--f-zh); font-weight: 500; line-height: 1.85; }

/* line underline rule — only present under active lighting.
   Driven by transform:scaleX (compositor-only) — never width (layout). */
.line::after {
  content: ""; position: absolute; left: 0; bottom: -.18em; height: 1px; width: 100%;
  background: linear-gradient(90deg, var(--gilt), transparent);
  transform: scaleX(0); transform-origin: left center; opacity: 0;
}

/* Emphasis swap: the inactive language becomes the quiet sub-inscription */
html[data-lang="en"] .line--zh { font-size: clamp(1rem, 1.7vw, 1.32rem); opacity: .72; }
html[data-lang="zh"] .manifesto .line:not(.line--zh) { font-size: clamp(1rem, 1.7vw, 1.32rem); opacity: .72; }

/* JS lighting: engrave-dim, then ignite by --t (latched). No-JS = stays fully lit. */
.inscription.lighting-on .line {
  color: color-mix(in oklab, var(--mist), var(--ivory) calc(var(--t, 0) * 100%));
  text-shadow: 0 0 calc(var(--t, 0) * 26px) rgba(198,160,82, calc(var(--t, 0) * .55));
}
.inscription.lighting-on .line::after { opacity: 1; transform: scaleX(var(--t, 0)); transition: transform .25s linear; }
.inscription.lighting-on .line b { color: color-mix(in oklab, var(--gilt-soft), var(--gilt) calc(var(--t, 0) * 100%)); }

.sun-glyph {
  display: inline-block; width: .7em; height: .7em; margin-left: .35em; border-radius: 50%;
  background: radial-gradient(circle, var(--gilt) 38%, transparent 60%);
  box-shadow: 0 0 0 1.5px var(--gilt), 0 0 14px rgba(198,160,82,.7);
  vertical-align: -.02em;
}

.marginalia {
  position: absolute; right: -1rem; top: 5rem; transform: translateX(100%);
  display: grid; grid-template-columns: auto; gap: .15rem .6rem; text-align: right;
  font-family: var(--f-mono); width: max-content;
}
.marginalia__fig { color: var(--gilt); font-size: 1.05rem; letter-spacing: .04em; }
.marginalia__lbl { color: var(--mist); font-size: .62rem; letter-spacing: .08em; margin-bottom: .6rem; text-transform: uppercase; }

/* ============================ 三则 · THE THREE TENETS ============================ */
.tenets { padding: clamp(3rem, 8vw, 7rem) 6vw; position: relative; z-index: 1; background: var(--mono-black); }
.tenet {
  min-height: 86svh; display: grid; place-content: center; justify-items: center;
  text-align: center; gap: 1.4rem; position: relative;
}
.tenet__glyph {
  font-family: var(--f-zh); font-weight: 900; font-size: clamp(7rem, 30vw, 20rem);
  line-height: .9; color: transparent;
  -webkit-text-stroke: 1.4px var(--gilt); text-stroke: 1.4px var(--gilt);
  opacity: .9; text-shadow: 0 0 60px rgba(198,160,82,.12);
}
.tenet__name { display: grid; gap: .4rem; }
.tenet__name [lang="zh-Hans"] { font-family: var(--f-zh); font-weight: 900; font-size: clamp(1.6rem, 5vw, 2.6rem); letter-spacing: .2em; text-indent: .2em; color: var(--ivory); }
.tenet__name [lang="en"] { font-family: var(--f-display); font-size: clamp(.78rem, 2vw, 1rem); letter-spacing: .4em; text-indent: .4em; text-transform: uppercase; color: var(--gilt); }
.tenet__line { max-width: 30ch; }
.tenet__line > span { display: block; }
.tenet__line [lang="en"] { font-family: var(--f-body); font-size: clamp(1.2rem, 2.4vw, 1.6rem); color: var(--ivory); }
.tenet__line [lang="zh-Hans"] { font-family: var(--f-zh); font-size: 1.05rem; color: var(--mist); margin-top: .6rem; }

/* ============================ 立 · THE STANDING ============================ */
.standing {
  padding: clamp(6rem, 16vw, 12rem) 7vw; max-width: 58ch; margin: 0 auto; text-align: center;
  position: relative; z-index: 1; background: var(--mono-black);
}
.standing__head > span { display: block; }
.standing__en { font-family: var(--f-display); font-weight: 400; font-size: clamp(1.5rem, 4.6vw, 3rem); line-height: 1.3; letter-spacing: .04em; color: var(--ivory); text-transform: uppercase; }
.standing__zh { font-family: var(--f-zh); font-weight: 500; font-size: clamp(1.1rem, 3vw, 1.6rem); color: var(--gilt); margin-top: 1.2rem; line-height: 1.6; }
.standing__body { margin-top: 2.6rem; }
.standing__body > span { display: block; }
.standing__body [lang="zh-Hans"] { color: var(--mist); margin-top: 1.4rem; font-size: .96em; }

/* ============================ 座 · THE SEAT ============================ */
.seat { padding: clamp(4rem, 12vw, 9rem) 6vw; position: relative; z-index: 1; background: var(--mono-black); }
.seat__grid {
  display: grid; gap: clamp(2rem, 5vw, 4rem); align-items: center;
  grid-template-columns: 1fr; max-width: 1000px; margin: 0 auto;
}
.seat__img { border: 1px solid var(--hairline); background-image: var(--lqip); background-size: cover; box-shadow: 0 30px 90px -40px #000; }
.seat__img img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 1086/1448; opacity: .92; }
.dossier { font-family: var(--f-mono); display: grid; gap: 1.3rem; }
.dossier > div { display: grid; gap: .35rem; border-bottom: 1px solid var(--hairline); padding-bottom: 1.1rem; }
.dossier dt { font-size: .66rem; letter-spacing: .26em; color: var(--gilt); }
.dossier dd { font-size: 1rem; letter-spacing: .04em; color: var(--ivory); }
.dossier dd [lang="zh-Hans"] { font-family: var(--f-zh); color: var(--mist); margin-left: .4rem; }
.seat__promise { text-align: center; margin-top: clamp(3rem, 8vw, 5rem); }
.seat__promise > span { display: block; }
.seat__promise [lang="en"] { font-family: var(--f-display); font-weight: 700; font-size: clamp(2rem, 8vw, 4.5rem); letter-spacing: .14em; text-indent: .14em; color: var(--ivory); }
.seat__promise [lang="zh-Hans"] { font-family: var(--f-zh); font-weight: 900; font-size: clamp(1.4rem, 5vw, 2.4rem); letter-spacing: .2em; color: var(--gilt); margin-top: 1rem; }

@media (min-width: 760px) {
  .seat__grid { grid-template-columns: minmax(0, 38%) 1fr; }
}

/* ============================ 印 · THE SEAL ============================ */
.seal-chamber {
  min-height: 92svh; display: grid; place-content: center; justify-items: center;
  text-align: center; gap: 1.6rem; padding: clamp(4rem, 12vw, 9rem) 6vw;
  position: relative; z-index: 1;
  background: radial-gradient(70% 50% at 50% 40%, rgba(42,7,9,.5), var(--mono-black) 75%), var(--mono-black);
}
.seal-stamp {
  width: clamp(110px, 24vw, 160px); aspect-ratio: 1; display: grid; place-items: center;
  border: 3px solid var(--cinnabar); border-radius: 8px;
  color: var(--cinnabar);
  box-shadow: 0 0 0 1px rgba(200,54,44,.3) inset;
}
.seal-armed .seal-stamp { opacity: 0; transform: scale(1.18); }
.seal-armed .seal-stamp.pressed {
  opacity: 1; transform: scale(1);
  transition: opacity .6s var(--ease-thud), transform .6s var(--ease-thud), box-shadow .8s var(--ease-settle);
  box-shadow: 0 0 0 1px rgba(200,54,44,.3) inset, 0 0 60px rgba(224,122,95,.4);
}
.seal-stamp__char { font-family: var(--f-zh); font-weight: 900; font-size: clamp(2.4rem, 7vw, 3.6rem); line-height: .95; letter-spacing: 0; }
.seal-sign { font-family: var(--f-body); font-style: italic; font-size: 1.3rem; color: var(--mist); }
.seal-tag > span { display: block; }
.seal-tag [lang="zh-Hans"] { font-family: var(--f-zh); font-weight: 500; letter-spacing: .42em; text-indent: .42em; color: var(--gilt); font-size: clamp(1rem, 3vw, 1.5rem); }
.seal-tag [lang="en"] { font-family: var(--f-mono); letter-spacing: .34em; text-indent: .34em; color: var(--mist); font-size: .7rem; margin-top: .8rem; text-transform: uppercase; }

.colophon { margin-top: 2.5rem; display: grid; gap: .5rem; font-family: var(--f-mono); font-size: .74rem; letter-spacing: .06em; color: var(--mist); }
.colophon__line [lang="zh-Hans"] { font-family: var(--f-zh); }
.colophon a { color: var(--gilt-soft); text-decoration-color: var(--hairline); text-underline-offset: 3px; }
.colophon a:hover { color: var(--gilt); }

/* ===== Shared bilingual body for the new chambers ====================== *
 * Both languages are always present (no-JS legibility + SEO). The inactive
 * language recedes to a quiet sub-inscription, mirroring 碑文. The active
 * language inherits the parent's size/colour; only the inactive is overridden. */
.bi > [lang] { display: block; }
.bi > [lang="en"] { font-family: var(--f-body); }
.bi > [lang="zh-Hans"] { font-family: var(--f-zh); margin-top: .55em; line-height: 1.85; }
html[data-lang="en"] .bi > [lang="zh-Hans"] { color: var(--mist); font-size: .88em; }
html[data-lang="zh"]  .bi > [lang="en"] { color: var(--mist); font-size: .88em; }

/* ============================ 谬政 · THE FOLLIES ============================ */
.follies {
  position: relative; z-index: 1;
  background:
    radial-gradient(95% 60% at 50% 0%, rgba(42,7,9,.6), transparent 72%),
    var(--mono-black);
  padding: clamp(5rem, 14vw, 11rem) 7vw clamp(4rem, 10vw, 8rem);
}
.follies__inner { max-width: 64ch; margin: 0 auto; }
.follies__intro { max-width: 60ch; margin: 0 auto clamp(3rem, 9vw, 6rem); text-align: center; }
.follies__intro [lang="en"] { font-style: italic; font-size: clamp(1.1rem, 2.3vw, 1.45rem); color: var(--ivory); line-height: 1.5; }
.follies__intro [lang="zh-Hans"] { color: var(--mist); }

.folly { position: relative; padding: clamp(1.8rem, 5vw, 2.6rem) 0; border-top: 1px solid var(--hairline); }
.folly:first-of-type { border-top: 0; }
.folly__rubric {
  display: flex; flex-wrap: wrap; align-items: baseline; gap: .45rem 1rem;
  font-family: var(--f-mono); font-size: .64rem; letter-spacing: .14em;
  text-transform: uppercase; color: var(--gilt-soft); margin-bottom: 1.1rem;
}
.folly__when { color: var(--mist); }
.folly__elev { color: var(--mist); opacity: .65; margin-left: auto; }
.folly__tag {
  font-family: var(--f-mono); font-size: .58rem; letter-spacing: .2em; text-transform: uppercase;
  color: var(--coral); padding: .18rem .5rem; border-radius: 2px;
  border: 1px solid color-mix(in oklab, var(--cinnabar) 55%, transparent);
}
.folly__head {
  font-family: var(--f-display); font-weight: 700; color: var(--ivory);
  font-size: clamp(1.5rem, 4.6vw, 2.4rem); letter-spacing: .03em; line-height: 1.12;
  display: flex; align-items: baseline; flex-wrap: wrap; gap: .55em; margin-bottom: 1.1rem;
}
.folly__head [lang="zh-Hans"] { font-family: var(--f-zh); font-weight: 900; font-size: .6em; letter-spacing: .12em; color: var(--gilt); }
.folly--forecast .folly__head [lang="en"] { color: var(--coral); }
.folly__body { font-size: clamp(1.12rem, 2.1vw, 1.42rem); line-height: 1.62; color: var(--ivory); }
.folly__body p { margin: 0; }
.folly__refs {
  margin-top: 1.3rem; font-family: var(--f-mono); font-size: .72rem; letter-spacing: .05em;
  display: flex; flex-wrap: wrap; gap: .4rem 1rem;
}
.folly__refs a { color: var(--gilt-soft); text-decoration-color: var(--hairline); text-underline-offset: 3px; }
.folly__refs a:hover { color: var(--gilt); }

/* ============================ 作品 · THE WORKS ============================ */
.works { position: relative; z-index: 1; background: var(--mono-black); padding: clamp(4rem, 12vw, 9rem) 7vw; }
.works__inner { max-width: 72ch; margin: 0 auto; }
.works__intro { max-width: 56ch; margin: 0 auto clamp(2.5rem, 7vw, 4.5rem); text-align: center; }
.works__intro [lang="en"] { font-style: italic; font-size: clamp(1.08rem, 2.2vw, 1.4rem); color: var(--ivory); }
.works__intro [lang="zh-Hans"] { color: var(--mist); }

.work { border-top: 1px solid var(--hairline); padding: clamp(1.8rem, 5vw, 2.6rem) 0; }
.work__marker {
  display: flex; justify-content: space-between; gap: 1rem;
  font-family: var(--f-mono); font-size: .64rem; letter-spacing: .16em;
  text-transform: uppercase; color: var(--gilt-soft);
}
.work__elev { color: var(--mist); opacity: .65; }
.work__name { display: flex; align-items: baseline; flex-wrap: wrap; gap: .6em; margin: 1rem 0 1.1rem; }
.work__name [lang="en"] { font-family: var(--f-display); font-weight: 700; font-size: clamp(1.45rem, 4.4vw, 2.2rem); letter-spacing: .03em; color: var(--ivory); }
.work__name [lang="zh-Hans"] { font-family: var(--f-zh); font-weight: 900; font-size: clamp(1.05rem, 3vw, 1.45rem); letter-spacing: .14em; color: var(--gilt); }
.work__body { font-size: clamp(1.05rem, 2vw, 1.3rem); line-height: 1.6; color: var(--ivory); }
.work__links {
  margin-top: 1.2rem; font-family: var(--f-mono); font-size: .74rem; letter-spacing: .04em;
  display: flex; flex-wrap: wrap; gap: .5rem 1.3rem;
}
.work__links a {
  color: var(--gilt-soft); text-decoration: underline; text-decoration-color: var(--hairline);
  text-underline-offset: 3px; display: inline-flex; align-items: baseline; gap: .4em;
}
.work__links a::before { content: "\2192"; color: var(--mist); }
.work__links a:hover { color: var(--gilt); }

/* ============================ 求 · THE PURSUIT ============================ */
.pursuit {
  position: relative; z-index: 1;
  background: radial-gradient(70% 50% at 50% 100%, rgba(224,122,95,.06), transparent 62%), var(--mono-black);
  padding: clamp(5rem, 14vw, 11rem) 7vw;
}
.pursuit__inner { max-width: 56ch; margin: 0 auto; text-align: center; }
.pursuit__intro { margin: 0 auto clamp(2.5rem, 8vw, 5rem); }
.pursuit__intro [lang="en"] { font-family: var(--f-display); font-weight: 400; font-size: clamp(1.15rem, 3.2vw, 1.85rem); letter-spacing: .04em; line-height: 1.4; color: var(--ivory); text-transform: uppercase; }
.pursuit__intro [lang="zh-Hans"] { color: var(--gilt); }

.aspire { margin: 0 auto clamp(3rem, 8vw, 5rem); max-width: 46ch; }
.aspire:last-child { margin-bottom: 0; }
.aspire__marker { font-family: var(--f-mono); font-size: .64rem; letter-spacing: .18em; text-transform: uppercase; color: var(--gilt-soft); }
.aspire__head { display: grid; gap: .35rem; margin: .9rem 0 1.2rem; }
.aspire__head [lang="zh-Hans"] { font-family: var(--f-zh); font-weight: 900; font-size: clamp(1.6rem, 5vw, 2.4rem); letter-spacing: .2em; text-indent: .2em; color: var(--ivory); }
.aspire__head [lang="en"] { font-family: var(--f-display); font-size: clamp(.78rem, 2vw, 1rem); letter-spacing: .36em; text-indent: .36em; text-transform: uppercase; color: var(--gilt); }
.aspire__body { font-size: clamp(1.08rem, 2.1vw, 1.4rem); line-height: 1.6; color: var(--ivory); }

/* ============================ 抗癌 · AGAINST CANCER ============================ */
.oncology {
  position: relative; z-index: 1;
  background: radial-gradient(80% 55% at 50% 0%, rgba(42,7,9,.5), transparent 70%), var(--mono-black);
  padding: clamp(5rem, 14vw, 11rem) 7vw;
}
.oncology__inner { max-width: 62ch; margin: 0 auto; }
.oncology__sub { max-width: 54ch; margin: 0 auto clamp(2.5rem, 7vw, 4rem); text-align: center; }
.oncology__sub [lang="en"] { font-style: italic; font-size: clamp(1.1rem, 2.3vw, 1.45rem); color: var(--ivory); line-height: 1.5; }
.oncology__sub [lang="zh-Hans"] { color: var(--mist); }
.oncology__lead { font-size: clamp(1.12rem, 2.1vw, 1.42rem); line-height: 1.6; color: var(--ivory); margin: 0 0 clamp(1.8rem, 4vw, 2.4rem); }
.levers { list-style: none; margin: 0 0 clamp(1.8rem, 4vw, 2.6rem); padding: 0; display: grid; gap: 1rem; counter-reset: lever; }
.levers li { position: relative; padding-left: 2.8rem; display: flex; flex-wrap: wrap; align-items: baseline; gap: .2rem .6em; }
.levers li::before {
  counter-increment: lever; content: counter(lever);
  position: absolute; left: 0; top: 0; width: 1.8rem; height: 1.8rem;
  display: grid; place-items: center; font-family: var(--f-mono); font-size: .72rem; color: var(--gilt);
  border: 1px solid var(--hairline); border-radius: 50%;
}
.lever__en { font-family: var(--f-display); font-size: clamp(1rem, 2.3vw, 1.28rem); letter-spacing: .02em; color: var(--ivory); }
.lever__zh { font-family: var(--f-zh); color: var(--gilt-soft); font-size: .92em; }
.oncology__ai { font-size: clamp(1.06rem, 2vw, 1.3rem); line-height: 1.62; color: var(--ivory); }
.oncology__ai b { color: var(--gilt); font-weight: 600; }
.oncology__link { margin-top: 1.4rem; font-family: var(--f-mono); font-size: .74rem; letter-spacing: .06em; }
.oncology__link a { color: var(--gilt-soft); text-decoration-color: var(--hairline); text-underline-offset: 3px; }
.oncology__link a:hover { color: var(--gilt); }

/* ---- Founder name in the seal + colophon disambiguation + footer nav (SEO) ---- */
.seal-sign > span { display: block; }
.seal-sign [lang="zh-Hans"] { font-family: var(--f-zh); font-size: .8em; font-style: normal; color: var(--mist); margin-top: .25rem; }
.colophon__founder { max-width: 62ch; margin: .5rem auto 0; line-height: 1.6; }
.colophon__founder > span { display: block; }
.colophon__founder [lang="zh-Hans"] { font-family: var(--f-zh); margin-top: .3rem; }
.colophon__founder a, .footnav a { color: var(--gilt-soft); }
.colophon__founder a { text-decoration-color: var(--hairline); text-underline-offset: 2px; }
.colophon__founder a:hover, .footnav a:hover { color: var(--gilt); }
.footnav { margin: 1.6rem auto 0; display: flex; flex-wrap: wrap; justify-content: center; gap: .4rem 1.2rem; font-family: var(--f-mono); font-size: .7rem; letter-spacing: .1em; text-transform: uppercase; }
.footnav a { text-decoration: none; }

/* ============================ 创始人 · THE FOUNDER (entity home) ============================ */
.founder { margin: clamp(3rem, 8vw, 5rem) auto 0; max-width: 52ch; text-align: center; border-top: 1px solid var(--hairline); padding-top: clamp(2.2rem, 6vw, 3.2rem); }
.founder__marker { font-family: var(--f-mono); font-size: .64rem; letter-spacing: .2em; text-transform: uppercase; color: var(--gilt-soft); }
.founder__name { display: grid; gap: .3rem; margin: .85rem 0 1.2rem; }
.founder__name [lang="en"] { font-family: var(--f-display); font-weight: 700; font-size: clamp(1.6rem, 5vw, 2.4rem); letter-spacing: .04em; color: var(--ivory); }
.founder__name [lang="zh-Hans"] { font-family: var(--f-zh); font-size: clamp(.8rem, 2vw, 1rem); letter-spacing: .26em; text-indent: .26em; color: var(--gilt); }
.founder__bio { font-size: clamp(1.02rem, 2vw, 1.22rem); line-height: 1.6; color: var(--ivory); }
.founder__links { margin-top: 1.3rem; font-family: var(--f-mono); font-size: .72rem; letter-spacing: .05em; display: flex; flex-wrap: wrap; justify-content: center; gap: .5rem 1.2rem; }
.founder__links a { color: var(--gilt-soft); text-decoration-color: var(--hairline); text-underline-offset: 3px; }
.founder__links a:hover { color: var(--gilt); }

/* ============================ 立此存照 · ON THE RECORD ============================ */
.docket { position: relative; z-index: 1; background: var(--mono-black); padding: clamp(4rem, 12vw, 9rem) 7vw; text-align: center; }
.docket__line { max-width: 56ch; margin: 0 auto; font-size: clamp(1.15rem, 2.5vw, 1.6rem); line-height: 1.55; }
.docket__line [lang="en"] { font-family: var(--f-body); font-style: italic; color: var(--ivory); }
.docket__line [lang="zh-Hans"] { color: var(--mist); }
.docket__sign { margin-top: 1.6rem; }
.docket__sign > span { display: block; }
.docket__sign [lang="en"] { font-family: var(--f-display); letter-spacing: .1em; color: var(--gilt); }
.docket__sign [lang="zh-Hans"] { font-family: var(--f-zh); font-size: .82em; color: var(--gilt-soft); margin-top: .25rem; }

/* ============================ Responsive ============================ */
/* The right-gutter marginalia needs ~110px of clear space beside the column;
   hide it until the viewport is wide enough that it cannot overflow. */
@media (max-width: 820px) {
  .marginalia { display: none; }
}
@media (max-width: 560px) {
  .manifesto::before, .movement::before, .movement::after { display: none; }
  .inscription__text { padding-left: 7vw; padding-right: 7vw; }
  .lang-switch { top: .8rem; right: .8rem; }
  .approach__plate { transform: translateY(4vh); padding: 1rem; }
}

/* ============================ Reduced motion & contrast ============================ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
  .approach__crown img, .wordmark__en, .wordmark__zh, .approach__tag, .descend { animation: none; }
  /* manifesto stays permanently, fully lit; lighting-on is never applied by JS */
}
@media (prefers-contrast: more) {
  :root { --mist: #b8bdd6; --hairline: #4a4f78; }
  .cartouche__line { color: var(--ivory); }
}