/* =========================================================
   运佳.STUDIO — Personal Site
   Design system: paper + coral + cyan, Swiss editorial × riso
   ========================================================= */

:root {
  /* ink */
  --ink: #0C1626;
  --ink-2: #101E34;
  --ink-3: #1A2C48;
  /* paper */
  --paper: #F1EEE7;
  --paper-2: #E7E3D8;
  --paper-3: #FBFAF6;
  /* brand */
  --coral: #FF5A47;
  --coral-deep: #E03A26;
  /* large type on the paper ground needs more contrast than the UI accent */
  --coral-display: #D2321B;
  --cyan: #00DFE8;
  --cyan-deep: #0097A3;
  /* type */
  --muted: #6E7581;
  --muted-2: #8B9099;
  --line: rgba(12, 22, 38, 0.16);
  --line-soft: rgba(12, 22, 38, 0.09);
  --dark-line: rgba(241, 238, 231, 0.2);
  --dark-muted: #97A0B0;
  /* motion */
  --ease: cubic-bezier(.22, 1, .36, 1);
  --ease-io: cubic-bezier(.65, 0, .35, 1);
  /* layout */
  --pad: clamp(16px, 3.4vw, 52px);
  --maxw: 1560px;
  /* fonts */
  --f-display: "Anton", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --f-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
            "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --f-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--f-sans);
  font-synthesis: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body.is-locked { overflow: hidden; }

a { color: inherit; text-decoration: none; }
button, input { color: inherit; font: inherit; }
button { border: 0; background: none; cursor: pointer; }
img, svg { display: block; max-width: 100%; }

a:focus-visible, button:focus-visible {
  outline: 2px solid var(--coral);
  outline-offset: 3px;
  border-radius: 3px;
}

::selection { background: var(--cyan); color: var(--ink); }

/* ---------- shared type helpers ---------- */
.mono {
  font-family: var(--f-mono);
  font-size: clamp(9.5px, 0.72vw, 11px);
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.muted { color: var(--muted); }
.shell { width: 100%; max-width: var(--maxw); margin: 0 auto; padding-inline: var(--pad); }

/* =========================================================
   1. GRAIN + OVERLAYS
   ========================================================= */
.grain {
  position: fixed;
  inset: -50%;
  z-index: 9000;
  pointer-events: none;
  opacity: .38;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='220' height='220'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.82' numOctaves='4' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.34'/%3E%3C/svg%3E");
  animation: grainShift 700ms steps(3) infinite;
}
@keyframes grainShift {
  0%   { transform: translate(0, 0); }
  33%  { transform: translate(-2%, 1.5%); }
  66%  { transform: translate(1.5%, -1%); }
  100% { transform: translate(0, 0); }
}

/* vignette on dark bands */
.grain--dark {
  opacity: .3;
  mix-blend-mode: overlay;
}

/* =========================================================
   2. CUSTOM CURSOR
   ========================================================= */
.cursor-dot, .cursor-ring {
  position: fixed;
  top: 0; left: 0;
  z-index: 9500;
  pointer-events: none;
  border-radius: 999px;
  will-change: transform;
}
.cursor-dot {
  width: 6px; height: 6px;
  margin: -3px 0 0 -3px;
  background: var(--coral);
  transition: opacity 200ms ease, width 200ms var(--ease), height 200ms var(--ease), margin 200ms var(--ease);
}
.cursor-ring {
  width: 34px; height: 34px;
  margin: -17px 0 0 -17px;
  border: 1px solid rgba(12, 22, 38, .45);
  background: rgba(255, 255, 255, .12);
  backdrop-filter: blur(2px);
  transition: opacity 200ms ease, width 260ms var(--ease), height 260ms var(--ease),
              margin 260ms var(--ease), background-color 240ms ease, border-color 240ms ease;
}
body.cursor-dark .cursor-ring { border-color: rgba(241, 238, 231, .5); background: rgba(255,255,255,.06); }
body.cursor-dark .cursor-dot { background: var(--cyan); }
body.cursor-hot .cursor-ring {
  width: 74px; height: 74px; margin: -37px 0 0 -37px;
  background: rgba(255, 90, 71, .14);
  border-color: var(--coral);
}
body.cursor-hot .cursor-dot { width: 0; height: 0; margin: 0; }
@media (hover: none), (pointer: coarse) {
  .cursor-dot, .cursor-ring { display: none; }
}

/* =========================================================
   3. SCROLL PROGRESS
   ========================================================= */
.progress {
  position: fixed;
  top: 0; left: 0;
  z-index: 8000;
  width: 100%; height: 3px;
  transform-origin: 0 50%;
  transform: scaleX(0);
  background: linear-gradient(90deg, var(--coral), var(--cyan));
  will-change: transform;
}

/* =========================================================
   4. PRELOADER
   ========================================================= */
.preloader {
  position: fixed;
  inset: 0;
  z-index: 9800;
  display: grid;
  place-items: center;
  background: var(--ink);
  color: var(--paper);
  transition: opacity 500ms ease, visibility 500ms;
}
.preloader__inner {
  display: grid;
  justify-items: center;
  gap: 26px;
  width: min(90vw, 520px);
  text-align: center;
}
/* on the dark loader the navy type would vanish — invert keeps the brand hues */
.preloader__mark {
  width: clamp(180px, 40vw, 300px);
  filter: invert(1) saturate(1.2);
  opacity: .96;
}
.preloader__bar {
  position: relative;
  width: 100%; height: 2px;
  background: rgba(241, 238, 231, .16);
  overflow: hidden;
}
.preloader__bar i {
  position: absolute; inset: 0;
  background: linear-gradient(90deg, var(--coral), var(--cyan));
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 180ms linear;
}
.preloader__row {
  display: flex; align-items: center; justify-content: space-between;
  width: 100%;
  font-family: var(--f-mono); font-size: 10px; letter-spacing: .18em; text-transform: uppercase;
  color: var(--dark-muted);
}
.preloader.is-done { opacity: 0; visibility: hidden; }
.preloader.is-done .preloader__inner { transform: translateY(-26px); transition: transform 600ms var(--ease); }

/* =========================================================
   5. NAV
   ========================================================= */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 7000;
  display: flex; align-items: center; justify-content: space-between;
  gap: 22px;
  padding: 14px var(--pad);
  transform: translateY(-102%);
  transition: transform 700ms var(--ease) 120ms, background-color 320ms ease, border-color 320ms ease, backdrop-filter 320ms ease;
  border-bottom: 1px solid transparent;
}
.nav.is-stuck {
  background: rgba(241, 238, 231, .82);
  backdrop-filter: blur(16px) saturate(1.3);
  border-bottom-color: var(--line-soft);
}
.nav.is-hidden { transform: translateY(-102%); }
.nav.is-ready { transform: translateY(0); }

.brandmark {
  display: flex; align-items: center; gap: 10px;
  padding: 5px 14px 5px 6px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(251, 250, 246, .5);
  transition: background-color 260ms ease, border-color 260ms ease, color 260ms ease, transform 260ms var(--ease);
}
.brandmark:hover { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.brandmark:hover .brandmark__img { transform: scale(1.1) rotate(-5deg); }
.brandmark__img {
  width: 32px; height: 32px; object-fit: contain;
  transition: transform 520ms var(--ease);
}
.brandmark__txt { display: grid; gap: 2px; line-height: 1; }
.brandmark__txt b { font-size: 12.5px; font-weight: 700; letter-spacing: -.01em; white-space: nowrap; }
.brandmark__txt small {
  font-family: var(--f-mono); font-size: 8.5px; letter-spacing: .17em;
  text-transform: uppercase; color: var(--muted);
  transition: color 260ms ease;
}
.brandmark:hover .brandmark__txt small { color: rgba(241,238,231,.7); }

.nav__links { display: flex; align-items: center; gap: 4px; }
.nav__link {
  position: relative;
  padding: 9px 15px;
  border-radius: 999px;
  font-size: 12.5px;
  letter-spacing: -.01em;
  overflow: hidden;
  isolation: isolate;
}
.nav__link::before {
  content: "";
  position: absolute; inset: 0;
  z-index: -1;
  background: var(--ink);
  transform: translateY(101%);
  transition: transform 380ms var(--ease);
}
.nav__link:hover::before, .nav__link.is-active::before { transform: translateY(0); }
.nav__link:hover, .nav__link.is-active { color: var(--paper); }
.nav__link i {
  display: inline-block; margin-right: 6px;
  font-family: var(--f-mono); font-size: 9px; font-style: normal;
  opacity: .55; vertical-align: 1px;
}

.nav__right { display: flex; align-items: center; gap: 10px; }

/* ---------- language switch ---------- */
.lang {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(251, 250, 246, .6);
  isolation: isolate;
}
.lang__pill {
  position: absolute;
  z-index: 0;
  top: 3px; bottom: 3px; left: 3px;
  width: calc(50% - 3px);
  border-radius: 999px;
  background: var(--ink);
  transform: translateX(0);
  transition: transform 420ms var(--ease), background-color 320ms ease;
}
.lang[data-active="en"] .lang__pill {
  background: var(--coral);
  transform: translateX(100%);
}
.lang__btn {
  position: relative;
  z-index: 1;
  min-width: 38px;
  padding: 7px 10px;
  border-radius: 999px;
  font-family: var(--f-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .08em;
  line-height: 1;
  color: var(--muted);
  text-align: center;
  transition: color 300ms ease;
  will-change: transform;
}
.lang__btn:hover { color: var(--ink); }
.lang__btn.is-on { color: var(--paper); }
.lang__btn.is-on:hover { color: var(--paper); }
@media (max-width: 900px) { .lang__btn { min-width: 32px; padding: 7px 7px; font-size: 10px; } }

.nav__cta {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 16px;
  border-radius: 999px;
  background: var(--coral);
  color: #fff;
  font-size: 12.5px; font-weight: 500;
  white-space: nowrap;
  transition: background-color 240ms ease, transform 240ms var(--ease);
}
.nav__cta:hover { background: var(--ink); }
.nav__cta span { transition: transform 320ms var(--ease); }
.nav__cta:hover span { transform: translate(3px, -3px); }

@media (max-width: 900px) {
  .nav__link i { display: none; }
  .nav__link { padding: 9px 11px; }
  .nav__cta { padding: 9px 13px; }
}
@media (max-width: 560px) {
  .brandmark__txt small { display: none; }
  .nav__links { gap: 0; }
  .nav__link { font-size: 11.5px; padding: 8px 9px; }
}

/* =========================================================
   6. HERO
   ========================================================= */
.hero {
  position: relative;
  padding: clamp(118px, 15vh, 172px) 0 0;
  overflow: hidden;
}
.hero__bg {
  position: absolute; inset: 0;
  pointer-events: none;
  background:
    radial-gradient(58% 46% at 84% 6%, rgba(0, 223, 232, .20), transparent 62%),
    radial-gradient(52% 44% at 6% 22%, rgba(255, 90, 71, .16), transparent 64%);
}
.hero__grid-lines {
  position: absolute; inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: calc(100% / 6) 100%;
  opacity: .85;
  -webkit-mask-image: linear-gradient(180deg, transparent, #000 22%, #000 68%, transparent);
          mask-image: linear-gradient(180deg, transparent, #000 22%, #000 68%, transparent);
}

@keyframes floatY { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-13px); } }

.btn {
  position: relative;
  display: inline-flex; align-items: center; gap: 11px;
  padding: 0 20px;
  height: 48px;
  border: 1px solid var(--ink);
  border-radius: 999px;
  background: transparent;
  font-size: 13.5px; font-weight: 500;
  overflow: hidden;
  isolation: isolate;
  transition: color 300ms ease, border-color 300ms ease;
  will-change: transform;
}
.btn > * { position: relative; z-index: 1; }
.btn::before {
  content: "";
  position: absolute; inset: 0; z-index: 0;
  border-radius: inherit;
  background: var(--ink);
  transform: translateY(100%);
  transition: transform 420ms var(--ease);
}
.btn:hover { color: var(--paper); }
.btn:hover::before { transform: translateY(0); }
.btn--solid { background: var(--ink); color: var(--paper); }
.btn--solid::before { background: var(--coral); }
.btn--solid:hover { color: #fff; border-color: var(--coral); }
.btn--ghost { border-color: var(--line); }
.btn--ghost::before { background: var(--cyan); }
.btn--ghost:hover { color: var(--ink); border-color: var(--cyan); }
.btn__arrow { transition: transform 360ms var(--ease); }
.btn:hover .btn__arrow { transform: translate(3px, -3px); }

@media (max-width: 980px) {
  .hero__grid-lines { background-size: calc(100% / 3) 100%; }
}

/* =========================================================
   7. MARQUEE
   ========================================================= */
.marquee {
  position: relative;
  display: flex;
  width: max-content;
  will-change: transform;
}
.marquee__band {
  position: relative;
  overflow: hidden;
  border-block: 1px solid var(--ink);
  background: var(--coral);
  color: #fff;
  padding: 13px 0;
}
.marquee__band--dark { background: var(--ink); color: var(--cyan); border-color: var(--ink); }
.marquee__track { display: flex; }
.marquee__item {
  display: inline-flex; align-items: center; gap: clamp(18px, 2.4vw, 40px);
  padding-right: clamp(18px, 2.4vw, 40px);
  font-family: var(--f-display);
  font-size: clamp(19px, 2.05vw, 32px);
  line-height: 1;
  letter-spacing: -.01em;
  white-space: nowrap;
}
.marquee__item em { font-style: normal; opacity: .55; }
.marquee__item--alt { font-family: var(--f-mono); font-size: clamp(10px, .95vw, 14px); letter-spacing: .24em; }

/* =========================================================
   8. SECTION SHELL
   ========================================================= */
.sec { position: relative; padding: clamp(70px, 9vw, 148px) 0; }
.sec--tight { padding: clamp(54px, 6vw, 96px) 0; }
.sec--dark {
  background: var(--ink);
  color: var(--paper);
}
.sec--dark .muted { color: var(--dark-muted); }
.sec--dark .mono { color: var(--dark-muted); }

.sec-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) minmax(0, .82fr);
  align-items: end;
  gap: clamp(16px, 3vw, 44px);
  padding-bottom: clamp(20px, 2.4vw, 30px);
  border-bottom: 1px solid var(--line);
  margin-bottom: clamp(26px, 3.4vw, 52px);
}
.sec--dark .sec-head { border-bottom-color: var(--dark-line); }
.sec-head__idx { color: var(--coral-display); }
.sec--dark .sec-head__idx { color: var(--cyan); }
.sec-head__title {
  margin: 0;
  font-size: clamp(34px, 5.2vw, 82px);
  font-weight: 800;
  line-height: .9;
  letter-spacing: -.05em;
}
.sec-head__title span { display: inline-block; will-change: transform; }
.sec-head__desc { margin: 0; max-width: 46ch; font-size: 13.5px; line-height: 1.55; color: var(--muted); }
@media (max-width: 880px) {
  .sec-head { grid-template-columns: 1fr; align-items: start; gap: 14px; }
  .sec-head__desc { max-width: none; }
}

/* reveal base */
[data-reveal] { will-change: transform, opacity; }
.js-reveal { opacity: 0; transform: translateY(26px); }
.js-reveal.is-in {
  opacity: 1; transform: none;
  transition: opacity 760ms var(--ease) var(--rd, 0ms), transform 760ms var(--ease) var(--rd, 0ms);
}

/* =========================================================
   9. SPLIT HERO — text left, portrait right
   ========================================================= */
.hero--split {
  min-height: clamp(580px, 94vh, 940px);
  padding: clamp(108px, 13vh, 148px) 0 clamp(30px, 4.5vh, 56px);
  display: flex;
  flex-direction: column;
}

.hero__split {
  position: static; /* the portrait anchors to the section so it can bleed full-height */
  display: flex;
  align-items: center;
  flex: 1 1 auto;
  width: 100%;
  min-width: 0;
}

.hero__text {
  position: relative;
  z-index: 3;
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: min(62%, 980px);
  min-width: 0;
}

.hero__kicker {
  display: inline-flex; align-items: center; gap: 12px;
  font-size: clamp(12.5px, 1.05vw, 16px);
  letter-spacing: .1em;
  color: var(--muted);
}
.hero__kicker i {
  width: 44px; height: 2px; flex: 0 0 auto;
  background: var(--coral);
}

.hero__claim {
  margin: clamp(18px, 2.2vw, 32px) 0 0;
  /* sized so the longest line ("变成能运行的系统。") clears the text column in one line */
  font-size: clamp(42px, 5.4vw, 90px);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: 0;
}
.hero__claim em {
  font-style: normal;
  color: var(--coral-display);
}

/* line-by-line masked entrance for the claim */
/* no `display` here — the [data-lang-only] rules own that, and they sit later in the file */
.hero__claim [data-ch-line] {
  overflow: hidden;
  padding-bottom: .1em;
  margin-bottom: -.1em;
}
.hero__claim [data-ch-line] > i {
  display: block;
  font-style: normal;
  will-change: transform, opacity;
}
/* only hides once JS has armed the animation, so a script failure still shows the text */
.hero__claim.armed [data-ch-line] > i {
  opacity: 0;
  transform: translateY(105%);
}
.hero__claim.armed.is-in [data-ch-line] > i {
  opacity: 1;
  transform: translateY(0);
  transition:
    transform 1050ms cubic-bezier(.16, 1, .3, 1) var(--ld, 0ms),
    opacity 760ms ease var(--ld, 0ms);
}

.hero__disciplines {
  margin: clamp(20px, 2.4vw, 36px) 0 0;
  font-size: clamp(14px, 1.35vw, 20px);
  font-weight: 500;
  letter-spacing: -.01em;
  color: #4A5260;
}
.hero__disciplines i { font-style: normal; color: var(--coral-display); margin: 0 .1em; }

/* ---------- portrait: full bleed, dissolving into the paper on its left ---------- */
.hero__portrait {
  position: absolute;
  z-index: 1;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(64%, 1080px);
  margin: 0;
  border-radius: 0;
  overflow: hidden;
  background:
    radial-gradient(120% 90% at 78% 12%, rgba(255, 255, 255, .95), transparent 58%),
    linear-gradient(152deg, #F0E7DB 0%, #E7DED2 46%, #DCE5E6 100%);
  will-change: transform;
}
/* the figure fades instead of rising, leaving `transform` free for scroll parallax */
.hero__portrait.js-reveal { transform: none; }

/* two gradients do the blending: the photo's own left edge is masked away, then a
   paper scrim sits on top so the headline always lands on calm ground */
.hero__photo {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: 26% 0%;
  -webkit-mask-image: linear-gradient(90deg, transparent 0%, #000 24%);
          mask-image: linear-gradient(90deg, transparent 0%, #000 24%);
  opacity: 0;
  transform: scale(1.09);
  filter: blur(12px) saturate(.82);
  transition:
    opacity 1500ms var(--ease-io) 140ms,
    transform 2200ms var(--ease),
    filter 1700ms var(--ease-io) 140ms;
}
.hero__portrait.has-photo .hero__photo {
  opacity: 1;
  transform: scale(1);
  filter: blur(0) saturate(1);
}

.hero__portrait::after {
  content: "";
  position: absolute; inset: 0;
  z-index: 2;
  pointer-events: none;
  background: linear-gradient(90deg,
    var(--paper) 0%,
    rgba(241, 238, 231, .96) 16%,
    rgba(241, 238, 231, .72) 30%,
    rgba(241, 238, 231, .22) 44%,
    transparent 56%);
  opacity: .5;
  transition: opacity 1400ms var(--ease-io) 220ms;
}
.hero__portrait.has-photo::after { opacity: 1; }

.hero__portrait-fallback {
  position: absolute; inset: 0;
  display: grid; place-items: center;
  transition:
    opacity 760ms cubic-bezier(.4, 0, 1, 1),
    transform 1000ms cubic-bezier(.4, 0, 1, 1),
    filter 900ms cubic-bezier(.4, 0, 1, 1);
}
.hero__portrait-fallback img {
  width: 56%;
  max-width: 300px;
  filter: drop-shadow(0 14px 30px rgba(12, 22, 38, .16));
  animation: floatY 9s ease-in-out infinite;
}
/* the mark dissolves and drifts back, so the photo reads as a cross-fade
   rather than one layer being swapped for another */
.hero__portrait.has-photo .hero__portrait-fallback {
  opacity: 0;
  transform: scale(.93) translateY(-10px);
  filter: blur(6px);
}

/* ---------- three-up service strip ---------- */
.hero__services {
  position: relative;
  z-index: 3; /* the full-bleed photo sits at z-index 1 — stay above it */
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  max-width: min(58%, 900px);
  border-top: 1px solid var(--line);
  margin-top: clamp(28px, 4vh, 56px);
}
/* Latin service names are long — ease them so the three columns stay level */
body[data-lang="en"] .hero__services b { font-size: clamp(13.5px, 1.2vw, 18px); }
body[data-lang="en"] .hero__services { max-width: min(66%, 1020px); }
.hero__services a {
  display: flex; align-items: center; gap: 14px;
  padding: clamp(20px, 2.4vw, 34px) clamp(10px, 1.6vw, 26px);
  border-right: 1px solid var(--line);
  transition: background-color 300ms ease;
}
.hero__services a:first-child { padding-left: 0; }
.hero__services a:last-child { border-right: 0; }
.hero__services a:hover { background: rgba(255, 90, 71, .05); }
.hero__svc-idx { color: var(--coral-display); }
.hero__services b {
  font-size: clamp(15px, 1.45vw, 22px);
  font-weight: 700;
  letter-spacing: -.035em;
  white-space: nowrap;
}
.hero__services i {
  margin-left: auto;
  font-style: normal;
  font-size: clamp(15px, 1.4vw, 20px);
  color: var(--cyan-deep);
  transition: transform 340ms var(--ease), color 300ms ease;
}
.hero__services a:hover i { transform: translateX(5px); color: var(--coral); }

@media (max-width: 980px) {
  .hero--split { padding-top: 92px; min-height: 0; }
  .hero__split { flex-direction: column; align-items: stretch; gap: 22px; }
  .hero__text { max-width: none; }
  /* stacked: the photo goes back to being a card under the headline */
  .hero__portrait {
    position: relative;
    top: auto; right: auto; bottom: auto;
    width: 100%;
    min-height: 300px;
    aspect-ratio: 4 / 3;
    border-radius: 18px;
  }
  .hero__photo {
    -webkit-mask-image: none;
            mask-image: none;
  }
  .hero__portrait::after {
    background: linear-gradient(200deg, rgba(255, 255, 255, .3), transparent 48%);
  }
  .hero__services a { padding-inline: 12px; }
  .hero__services a:first-child { padding-left: 0; }
}
@media (max-width: 560px) {
  .hero__claim { font-size: 10vw; }
  .hero__services { grid-template-columns: 1fr; max-width: none; }
  .hero__services a {
    border-right: 0;
    border-bottom: 1px solid var(--line-soft);
    padding-inline: 0;
  }
  .hero__services a:last-child { border-bottom: 0; }
}

/* =========================================================
   9b. STUDIO / 业务线索引
   ========================================================= */
.lines { display: grid; gap: 10px; }

.line {
  position: relative;
  display: grid;
  grid-template-columns: 3px 76px minmax(0, 1fr) auto;
  align-items: start;
  gap: clamp(14px, 2vw, 34px);
  padding: clamp(20px, 2.4vw, 32px) clamp(18px, 2.2vw, 32px);
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--paper-3);
  overflow: hidden;
  isolation: isolate;
  transition: border-color 400ms ease, color 320ms ease, box-shadow 500ms var(--ease);
  will-change: transform;
}
.line::after {
  content: "";
  position: absolute; inset: 0; z-index: -1;
  background: var(--ink);
  transform: translateY(101%);
  transition: transform 520ms var(--ease);
}
.line:hover { border-color: var(--ink); box-shadow: 0 18px 44px rgba(12, 22, 38, .1); }
.line:hover::after { transform: translateY(0); }
.line:hover .line__idx,
.line:hover .line__count span { color: rgba(241, 238, 231, .55); }
.line:hover .line__count b { color: var(--cyan); }
.line:hover .line__en { color: rgba(241, 238, 231, .6); }
.line:hover .line__en em { color: var(--cyan); }
.line:hover .line__desc { color: #C6CBD3; }
.line:hover .line__tags li { border-color: rgba(241, 238, 231, .3); color: #DDE1E7; }
.line:hover .line__cn { color: var(--paper); }

.line__bar {
  position: absolute; left: 0; top: 0; bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--coral), var(--cyan));
  transform: scaleY(0);
  transform-origin: 50% 0;
  transition: transform 620ms var(--ease) var(--rd, 0ms);
}
.line.is-in .line__bar { transform: scaleY(1); }

.line__idx { grid-column: 2; color: var(--coral-display); padding-top: 4px; }
.line__body { grid-column: 3; min-width: 0; }
.line__count b {
  display: block;
  font-family: var(--f-display);
  font-size: clamp(24px, 2.6vw, 40px);
  font-weight: 400;
  line-height: 1;
  color: var(--coral-display);
  -webkit-text-stroke: .0045em currentColor;
  transition: color 320ms ease;
}
.line__cn {
  margin: 0;
  font-size: clamp(24px, 3vw, 46px);
  font-weight: 800;
  line-height: 1.04;
  letter-spacing: -.05em;
  transition: color 320ms ease;
}
.line__en {
  display: block;
  margin: 10px 0 0;
  font-family: var(--f-mono);
  font-size: clamp(9.5px, .78vw, 11.5px);
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--muted);
  transition: color 320ms ease;
}
.line__en em { font-style: normal; color: var(--coral-display); }
.line__desc {
  margin: 14px 0 0;
  max-width: 58ch;
  font-size: 14px;
  line-height: 1.6;
  color: #3D4552;
  transition: color 320ms ease;
}
.line__tags {
  display: flex; flex-wrap: wrap; gap: 6px;
  margin: 18px 0 0; padding: 0; list-style: none;
}
.line__tags li {
  padding: 5px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 11.5px;
  color: #4A5260;
  transition: border-color 320ms ease, color 320ms ease;
}
.line__count {
  grid-column: 4;
  text-align: right;
  padding-top: 2px;
}
.line__count span {
  display: block; margin-top: 8px;
  font-family: var(--f-mono); font-size: 9px;
  letter-spacing: .14em; text-transform: uppercase;
  color: var(--muted);
}
@media (max-width: 900px) {
  .line { grid-template-columns: 3px 44px minmax(0, 1fr); }
  .line__count { display: none; }
}

.sec-head--sub { margin-top: clamp(38px, 4.4vw, 72px); }
.sec-head__title--sm { font-size: clamp(26px, 3vw, 48px); }

/* =========================================================
   10. CASES / 精选交付
   ========================================================= */
.case { margin-bottom: clamp(16px, 1.8vw, 26px); }
.case__row {
  display: grid;
  grid-template-columns: minmax(0, .88fr) minmax(0, 1.12fr);
  border: 1px solid var(--line);
  border-radius: 20px;
  overflow: hidden;
  background: var(--paper-3);
  transition: border-color 380ms ease, box-shadow 500ms var(--ease);
  will-change: transform;
}
.case--flip .case__row { grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr); }
.case__row:hover { border-color: rgba(12, 22, 38, .4); box-shadow: 0 26px 60px rgba(12, 22, 38, .12); }

.case__info {
  position: relative;
  display: flex; flex-direction: column;
  padding: clamp(22px, 2.6vw, 40px);
  gap: 16px;
}
.case--flip .case__info { order: 2; }
.case__top { display: flex; align-items: center; justify-content: space-between; gap: 14px; flex-wrap: wrap; }
.case__idx { color: var(--coral-display); }
.case__name {
  margin: 4px 0 0;
  font-size: clamp(34px, 4.2vw, 72px);
  font-weight: 800;
  line-height: .88;
  letter-spacing: -.055em;
}
.case__name em { font-style: normal; color: var(--coral-display); }
.case__en {
  font-family: var(--f-mono);
  font-size: 11px; letter-spacing: .26em; text-transform: uppercase;
  color: var(--muted);
}
.case__desc { margin: 0; max-width: 44ch; font-size: 14.5px; line-height: 1.6; color: #3D4552; }

.case__media {
  position: relative;
  min-height: clamp(320px, 33vw, 560px);
  overflow: hidden;
  border-left: 1px solid var(--line);
}
.case--flip .case__media { order: 1; border-left: 0; border-right: 1px solid var(--line); }
.case--a .case__media { background: linear-gradient(146deg, #F2DCD8 0%, #EED6D3 46%, #D6EBEF 100%); }
.case--b .case__media { background: linear-gradient(146deg, #D6EBEF 0%, #CFE6EA 44%, #EFDCD6 100%); }
.case--c .case__media { background: linear-gradient(146deg, #F2E1D2 0%, #EFDDD0 48%, #D9E4F2 100%); }

.case__media::after {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(320px 320px at var(--mx, 50%) var(--my, 50%), rgba(255,255,255,.5), transparent 70%);
  opacity: 0; transition: opacity 420ms ease;
  pointer-events: none;
}
.case__row:hover .case__media::after { opacity: 1; }

@media (max-width: 900px) {
  .case__row, .case--flip .case__row { grid-template-columns: 1fr; }
  .case--flip .case__info { order: 2; }
  .case--flip .case__media { order: 1; border-right: 0; border-bottom: 1px solid var(--line); }
  .case__media, .case--flip .case__media {
    min-height: 320px;
    border-left: 0; border-right: 0;
    border-bottom: 1px solid var(--line);
  }
}

/* ---------- 其余交付索引 ---------- */
.ledger { margin-top: clamp(34px, 4.4vw, 70px); }
.ledger__head {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: 18px; flex-wrap: wrap;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}
.ledger__title { color: var(--coral-display); }
.ledger__list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 0; padding: 0; list-style: none;
}
.ledger__list li {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr) minmax(0, 1.05fr);
  align-items: baseline;
  gap: 14px;
  padding: 15px 18px 15px 0;
  border-bottom: 1px solid var(--line-soft);
  transition: background-color 300ms ease, padding-left 340ms var(--ease);
}
.ledger__list li:nth-child(2n) {
  padding-right: 0; padding-left: 22px;
  border-left: 1px solid var(--line-soft);
}
.ledger__list li:hover { background: rgba(255, 90, 71, .06); padding-left: 12px; }
.ledger__list li:nth-child(2n):hover { padding-left: 34px; }
.ledger__y { color: var(--coral-display); }
.ledger__list b { font-size: 14px; font-weight: 600; letter-spacing: -.02em; }
.ledger__list span:last-child { color: var(--muted); font-size: 12px; line-height: 1.45; }
@media (max-width: 900px) {
  .ledger__list { grid-template-columns: 1fr; }
  .ledger__list li { grid-template-columns: 56px minmax(0, 1fr); padding-right: 0; }
  .ledger__list li:nth-child(2n) { padding-left: 0; border-left: 0; }
  .ledger__list span:last-child { grid-column: 2; }
  .ledger__list li:nth-child(2n):hover { padding-left: 12px; }
}

/* =========================================================
   11. ABOUT THE STUDIO / 关于工作室
   ========================================================= */
.about-studio {
  display: grid;
  grid-template-columns: minmax(0, 1.34fr) minmax(0, .66fr);
  gap: clamp(22px, 3.4vw, 66px);
  align-items: start;
  margin-top: clamp(58px, 7vw, 116px);
  padding-top: clamp(40px, 5vw, 78px);
  border-top: 1px solid var(--dark-line);
}
.about-studio__big {
  margin: 0;
  max-width: 22ch;
  font-size: clamp(23px, 2.7vw, 44px);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -.045em;
}
.about-studio__body { display: grid; gap: 15px; margin-top: clamp(22px, 2.6vw, 36px); }
.about-studio__body p { margin: 0; max-width: 62ch; font-size: 14.5px; line-height: 1.72; color: #C6CBD3; }
.about-studio__side { display: grid; gap: 12px; }
/* scoped to the dark section so the light .fact-card base cannot win on order */
.sec--dark .fact-card {
  background: rgba(255, 255, 255, .035);
  border-color: var(--dark-line);
}
.sec--dark .fact-card:hover {
  border-color: var(--cyan);
  background: rgba(0, 223, 232, .07);
  box-shadow: none;
}
.sec--dark .fact-card__k { color: var(--dark-muted); }
.sec--dark .fact-card__v { color: var(--paper); }
.sec--dark .fact-card__v small { color: var(--dark-muted); }
@media (max-width: 900px) { .about-studio { grid-template-columns: 1fr; } }

/* =========================================================
   11. SHARED PARTS USED BY CASES
   ========================================================= */
.proj__tags { display: flex; flex-wrap: wrap; gap: 6px; }
.proj__tags span {
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--f-mono);
  font-size: 9px; letter-spacing: .1em; text-transform: uppercase;
  color: var(--muted);
  white-space: nowrap;
  transition: background-color 260ms ease, color 260ms ease;
}
.case__row:hover .proj__tags span { background: var(--paper-2); color: var(--ink); }

.proj__facts {
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0; margin: 4px 0 0;
  border-top: 1px solid var(--line-soft);
}
.proj__facts div { padding: 13px 12px 13px 0; border-bottom: 1px solid var(--line-soft); }
.proj__facts div:nth-child(even) { padding-left: 12px; border-left: 1px solid var(--line-soft); }
.proj__facts dt {
  color: var(--muted); font-family: var(--f-mono);
  font-size: 9.5px; letter-spacing: .1em; text-transform: uppercase;
}
.proj__facts dd { margin: 7px 0 0; font-size: 12.5px; font-weight: 500; line-height: 1.35; }

.proj__foot {
  display: flex; align-items: center; justify-content: space-between;
  gap: 14px; margin-top: auto; padding-top: 12px;
}
.proj__year {
  color: var(--muted);
  font-family: var(--f-mono); font-size: 10px; letter-spacing: .16em;
}
.proj__link {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 10px 16px;
  border: 1px solid var(--ink);
  border-radius: 999px;
  font-size: 12.5px; font-weight: 600;
  cursor: pointer;
  transition: background-color 300ms ease, color 300ms ease;
}
.proj__link:hover { background: var(--ink); color: var(--paper); }
.proj__link span { transition: transform 320ms var(--ease); }
.proj__link:hover span { transform: translate(3px, -3px); }

/* key visuals are full-bleed; a feathered mask dissolves the edges into the
   card ground instead of leaving a hard rectangular cut */
.proj__art {
  position: absolute;
  inset: 0;
  transform: scale(1);
  transition: transform 900ms var(--ease);
  -webkit-mask-image: radial-gradient(112% 108% at 50% 50%, #000 58%, rgba(0,0,0,.25) 82%, transparent 100%);
          mask-image: radial-gradient(112% 108% at 50% 50%, #000 58%, rgba(0,0,0,.25) 82%, transparent 100%);
}
.case__row:hover .proj__art { transform: scale(1.04); }
.proj__art img { width: 100%; height: 100%; object-fit: cover; object-position: center; }

.proj__note {
  position: absolute;
  left: clamp(14px, 1.6vw, 24px);
  bottom: clamp(14px, 1.6vw, 24px);
  right: clamp(14px, 1.6vw, 24px);
  display: flex; align-items: center; justify-content: space-between; gap: 14px;
  padding: 12px 16px;
  border-radius: 12px;
  background: rgba(251, 250, 246, .84);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(12, 22, 38, .12);
  transform: translateY(6px);
  opacity: .9;
  transition: transform 480ms var(--ease), opacity 480ms ease;
}
.case__row:hover .proj__note { transform: none; opacity: 1; }
.proj__note small { color: var(--muted); font-size: 11.5px; line-height: 1.4; }
.proj__note b { font-size: 13px; font-weight: 700; letter-spacing: -.02em; }

/* =========================================================
   12. FACT CARDS
   ========================================================= */
.fact-card {
  padding: 18px 18px 20px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--paper-3);
  transition: border-color 300ms ease, transform 420ms var(--ease), box-shadow 420ms var(--ease);
  will-change: transform;
}
.fact-card:hover {
  border-color: var(--ink);
  transform: translateY(-4px);
  box-shadow: 0 16px 34px rgba(12, 22, 38, .09);
}
.fact-card__k { color: var(--muted); }
.fact-card__v {
  margin: 12px 0 0;
  font-size: 15.5px; font-weight: 600; line-height: 1.35; letter-spacing: -.02em;
}
.fact-card__v small {
  display: block; margin-top: 6px;
  color: var(--muted); font-size: 12px; font-weight: 400; letter-spacing: 0;
  line-height: 1.5;
}

/* =========================================================
   13. DARK BAND
   ========================================================= */
.dark-band { position: relative; overflow: hidden; background: var(--ink); color: var(--paper); }
.dark-band__glow {
  position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(44% 40% at 78% 8%, rgba(0, 223, 232, .17), transparent 64%),
    radial-gradient(46% 42% at 10% 88%, rgba(255, 90, 71, .18), transparent 66%);
}
.dark-band__grid {
  position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(241,238,231,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(241,238,231,.045) 1px, transparent 1px);
  background-size: 58px 58px;
  -webkit-mask-image: radial-gradient(80% 70% at 50% 40%, #000, transparent 82%);
          mask-image: radial-gradient(80% 70% at 50% 40%, #000, transparent 82%);
}
.dark-band__shell { position: relative; z-index: 1; }
.sec--dark .muted { color: var(--dark-muted); }
.sec--dark .mono { color: var(--dark-muted); }
.sec--dark .sec-head__idx { color: var(--cyan); }

/* =========================================================
   14. AI MANAGEMENT LOOP
   ========================================================= */
.loop {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  gap: clamp(20px, 3vw, 54px);
  align-items: center;
  margin-top: clamp(30px, 4vw, 62px);
  padding: clamp(22px, 3vw, 44px);
  border: 1px solid var(--dark-line);
  border-radius: 22px;
  background: rgba(255, 255, 255, .022);
}
.loop__copy h3 {
  margin: 0;
  font-size: clamp(26px, 3.4vw, 52px);
  font-weight: 800; line-height: .98; letter-spacing: -.05em;
}
.loop__copy h3 em { font-style: normal; color: var(--cyan); }
.loop__copy p { margin: 16px 0 0; max-width: 52ch; color: #B9BFC9; font-size: 13.5px; line-height: 1.65; }
.loop__steps { display: grid; gap: 8px; margin-top: 24px; }
.loop__step {
  display: flex; align-items: center; gap: 13px;
  padding: 12px 15px;
  border: 1px solid var(--dark-line);
  border-radius: 12px;
  background: rgba(9, 15, 26, .5);
  transition: border-color 340ms ease, background-color 340ms ease, transform 380ms var(--ease);
}
.loop__step:hover { border-color: rgba(0, 223, 232, .5); background: rgba(0, 223, 232, .07); transform: translateX(6px); }
.loop__step b {
  width: 26px; height: 26px; flex: 0 0 auto;
  display: grid; place-items: center;
  border-radius: 999px;
  background: var(--coral); color: #fff;
  font-family: var(--f-mono); font-size: 11px;
}
.loop__step span { font-size: 14px; font-weight: 600; }
.loop__step small {
  margin-left: auto;
  color: var(--dark-muted);
  font-family: var(--f-mono); font-size: 9.5px; letter-spacing: .1em; text-transform: uppercase;
}
.loop__viz { position: relative; display: grid; place-items: center; }
.loop__viz svg { width: 100%; max-width: 440px; height: auto; overflow: visible; }
.loop__spin { transform-origin: 50% 50%; animation: spin 26s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.loop__spin--rev { animation: spin 34s linear infinite reverse; }
.loop__pulse { animation: loopPulse 3.4s ease-in-out infinite; transform-origin: 50% 50%; }
@keyframes loopPulse { 0%, 100% { transform: scale(1); opacity: .9; } 50% { transform: scale(1.045); opacity: 1; } }
@media (max-width: 980px) { .loop { grid-template-columns: 1fr; } }

/* =========================================================
   15. CONTACT
   ========================================================= */
.contact-card {
  position: relative;
  padding: clamp(26px, 3.4vw, 56px);
  border-radius: 24px;
  overflow: hidden;
  background: var(--ink);
  color: var(--paper);
  isolation: isolate;
}
.contact-card__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 224px;
  align-items: center;
  gap: clamp(28px, 5vw, 76px);
}
.contact-card__content { min-width: 0; }
.contact-qr {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 9px;
  text-align: center;
}
.contact-qr__image {
  width: 208px;
  aspect-ratio: 1;
  padding: 9px;
  border-radius: 8px;
  background: #fff;
}
.contact-qr__image img { display: block; width: 100%; height: 100%; object-fit: contain; }
.contact-qr strong { color: var(--paper); font-size: 14px; font-weight: 700; }
.contact-qr > span { color: rgba(241,238,231,.68); font-size: 11px; }
.contact-card__bg {
  position: absolute; inset: 0; z-index: -1;
  background:
    radial-gradient(50% 70% at 88% 10%, rgba(0, 223, 232, .3), transparent 62%),
    radial-gradient(50% 70% at 6% 96%, rgba(255, 90, 71, .34), transparent 64%);
}
.contact-card__bubbles { position: absolute; inset: 0; z-index: -1; opacity: .14; pointer-events: none; }
.contact-card__bubbles rect,
.contact-card__bubbles path {
  transform-box: fill-box;
  transform-origin: center;
  animation: bubbleDrift 13s ease-in-out infinite;
}
.contact-card__bubbles rect:nth-child(2) { animation-delay: -3.5s; animation-duration: 16s; }
.contact-card__bubbles rect:nth-child(4) { animation-delay: -7s;   animation-duration: 18s; }
.contact-card__bubbles rect:nth-child(5) { animation-delay: -1.5s; animation-duration: 15s; }
.contact-card__bubbles rect:nth-child(6) { animation-delay: -9s;   animation-duration: 19s; }
@keyframes bubbleDrift {
  0%, 100% { transform: translateY(0)    rotate(0deg); }
  33%      { transform: translateY(-14px) rotate(3deg); }
  66%      { transform: translateY(9px)   rotate(-2.5deg); }
}
.contact-card__top {
  display: flex; align-items: center; justify-content: space-between;
  gap: 20px; flex-wrap: wrap;
}
.contact-card h2 {
  margin: clamp(20px, 2.6vw, 34px) 0 0;
  max-width: 20ch;
  font-size: clamp(34px, 5.6vw, 92px);
  font-weight: 800; line-height: .92; letter-spacing: -.055em;
}
.contact-card h2 em { font-style: normal; color: var(--cyan); }
.contact-card__sub {
  margin: 20px 0 0; max-width: 58ch;
  color: rgba(241, 238, 231, .72); font-size: 14px; line-height: 1.6;
}
.contact-card__mail {
  display: inline-flex; align-items: center; gap: 12px;
  margin-top: 28px;
  padding-bottom: 6px;
  border-bottom: 1.5px solid var(--cyan);
  font-family: var(--f-mono);
  font-size: clamp(14px, 1.8vw, 24px);
  letter-spacing: -.01em;
  transition: color 300ms ease, border-color 300ms ease;
}
.contact-card__mail:hover { color: var(--coral); border-color: var(--coral); }
.contact-card__acts { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 30px; }
.contact-card .btn { border-color: rgba(241, 238, 231, .5); color: var(--paper); }
.contact-card .btn::before { background: var(--coral); }
.contact-card .btn:hover { color: #fff; border-color: var(--coral); }
.contact-card .btn--ghost::before { background: var(--cyan); }
.contact-card .btn--ghost:hover { color: var(--ink); border-color: var(--cyan); }

.contact-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 12px;
}
.contact-list__item {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--paper-3);
  transition: border-color 300ms ease, transform 340ms var(--ease), background-color 300ms ease;
}
.contact-list__item:hover { border-color: var(--ink); background: #fff; transform: translateY(-3px); }
.contact-list__item span {
  color: var(--muted);
  font-family: var(--f-mono); font-size: 9.5px; letter-spacing: .14em; text-transform: uppercase;
}
.contact-list__item b { font-size: 13.5px; font-weight: 600; letter-spacing: -.01em; }
@media (max-width: 760px) { .contact-list { grid-template-columns: 1fr; } }
@media (max-width: 760px) {
  .contact-card__layout { grid-template-columns: 1fr; gap: 28px; }
  .contact-qr {
    display: grid;
    grid-template-columns: 160px minmax(0, 1fr);
    justify-items: start;
    align-items: center;
    gap: 7px 16px;
    max-width: 360px;
    text-align: left;
  }
  .contact-qr__image { grid-row: span 2; width: 160px; padding: 7px; }
}

/* =========================================================
   16. FOOTER
   ========================================================= */
.footer {
  padding: clamp(46px, 6vw, 90px) 0 26px;
  border-top: 1px solid var(--line);
  margin-top: clamp(40px, 5vw, 76px);
}
.footer__word {
  display: block;
  font-family: var(--f-display);
  font-size: clamp(58px, 15.2vw, 250px);
  line-height: .8;
  letter-spacing: -.03em;
  text-align: center;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--line);
  transition: color 400ms ease, -webkit-text-stroke-color 400ms ease;
  user-select: none;
  white-space: nowrap;
}
.footer:hover .footer__word { color: var(--coral-display); -webkit-text-stroke-color: var(--coral-display); }
.footer__row {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: 16px;
  margin-top: 30px;
  padding-top: 20px;
  border-top: 1px solid var(--line-soft);
  color: var(--muted);
}
.footer__nav { display: flex; flex-wrap: wrap; gap: 18px; }
.footer__nav a { position: relative; font-size: 12.5px; }
.footer__nav a::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -3px;
  height: 1px; background: var(--coral);
  transform: scaleX(0); transform-origin: 100% 50%;
  transition: transform 380ms var(--ease);
}
.footer__nav a:hover::after { transform: scaleX(1); transform-origin: 0 50%; }
.footer__legal {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 10px;
  margin-top: 14px;
  color: var(--muted);
  font-size: 12px;
}
.footer__icp {
  padding: 7px 10px;
  border: 1px solid var(--line);
  border-radius: 4px;
  transition: color 200ms ease, border-color 200ms ease;
}
.footer__icp:hover { color: var(--ink); border-color: var(--muted); }
.to-top {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 10px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 12px;
  transition: background-color 300ms ease, color 300ms ease, border-color 300ms ease, transform 300ms var(--ease);
}
.to-top:hover { background: var(--ink); color: var(--paper); border-color: var(--ink); transform: translateY(-3px); }
.to-top span { transition: transform 320ms var(--ease); }
.to-top:hover span { transform: translateY(-3px); }

/* =========================================================
   17. TOAST
   ========================================================= */
.toast {
  position: fixed;
  right: 50%; bottom: 26px;
  z-index: 9600;
  display: flex; align-items: center; gap: 11px;
  max-width: min(420px, calc(100vw - 28px));
  padding: 11px 18px 11px 12px;
  border-radius: 999px;
  background: var(--ink);
  color: var(--paper);
  font-size: 12.5px;
  box-shadow: 0 20px 50px rgba(12, 22, 38, .3);
  opacity: 0; pointer-events: none;
  transform: translate(50%, 22px);
  transition: opacity 280ms ease, transform 420ms var(--ease);
}
.toast.is-on { opacity: 1; transform: translate(50%, 0); }
.toast > b {
  width: 26px; height: 26px; flex: 0 0 auto;
  display: grid; place-items: center;
  border-radius: 999px;
  background: var(--cyan); color: var(--ink);
  font-size: 13px; font-weight: 700;
}
.toast p { margin: 0; font-size: 12.5px; line-height: 1.35; }

/* =========================================================
   16. LANGUAGE VARIANTS
   ========================================================= */

/* hero display type: one CJK claim vs one Latin claim */
/* the .hero__name lockup was replaced by .hero__claim in the split hero */

/* bilingual blocks: only the active variant is rendered */
[data-lang-only] { display: none; }
body[data-lang="zh"] [data-lang-only="zh"],
body[data-lang="en"] [data-lang-only="en"] { display: block; }

/* English runs longer — tighten the display sizes a notch */
body[data-lang="en"] .sec-head__title { font-size: clamp(30px, 4.4vw, 68px); }
body[data-lang="en"] .sec-head__desc { max-width: 52ch; }
body[data-lang="en"] .about__statement { font-size: clamp(20px, 2.35vw, 40px); }
body[data-lang="en"] .proj__name { font-size: clamp(32px, 3.9vw, 64px); }
body[data-lang="en"] .proj__desc { max-width: 46ch; }
body[data-lang="en"] .about__body p { max-width: 66ch; }
body[data-lang="en"] .tl__body p { max-width: 70ch; }
body[data-lang="en"] .loop__copy p { max-width: 52ch; }
body[data-lang="en"] .contact-card h2 { max-width: 20ch; }
body[data-lang="en"] .contact-card__sub { max-width: 58ch; }
body[data-lang="en"] .cap p { font-size: 13.2px; }
body[data-lang="en"] .marquee__item { font-size: clamp(17px, 1.8vw, 28px); }
body[data-lang="en"] .matrix__head h3 { font-size: clamp(21px, 2.6vw, 40px); }
body[data-lang="en"] .fact-card__v { font-size: 14.5px; }
/* Latin headlines run much longer than the CJK claim — ease the size back */
body[data-lang="en"] .hero__claim { font-size: clamp(30px, 3.9vw, 62px); }

@media (max-width: 560px) {
  body[data-lang="en"] .sec-head__title { font-size: 30px; }
  body[data-lang="en"] .hero__claim { font-size: 7.6vw; }
  body[data-lang="en"] .about__statement { font-size: 25px; }
  body[data-lang="en"] .proj__name { font-size: 36px; }
  body[data-lang="en"] .contact-card h2 { font-size: 34px; }
}


@media (max-width: 560px) {
  .hero { padding-top: 104px; }
  .contact-card { border-radius: 18px; }
  .footer__word { font-size: 13vw; -webkit-text-stroke-width: 1px; }
  .footer__legal { justify-content: flex-start; font-size: 11px; }
  /* tighten the bar so the contact affordance survives, then drop its label */
  .nav { gap: 8px; padding: 12px var(--pad); }
  .nav__link { padding: 8px 10px; font-size: 12px; }
  .lang__btn { min-width: 28px; padding: 6px 6px; font-size: 9.5px; }
  .nav__cta {
    display: inline-flex;
    width: 32px; height: 32px;
    padding: 0; gap: 0;
    justify-content: center;
  }
  .nav__cta span:first-child { display: none; }
  /* icon-only brandmark keeps room for 4 links + the language switch */
  .brandmark { padding: 3px; gap: 0; border-radius: 12px; }
  .brandmark__img { width: 28px; height: 28px; }
  .brandmark__txt { display: none; }
  .contact-card__mail { font-size: 13px; }
}

@media (max-width: 380px) {
  .nav__link { padding: 8px 7px; font-size: 11px; }
  .brandmark__txt b { font-size: 11px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    transition-delay: 0ms !important;
  }
  .js-reveal { opacity: 1; transform: none; }
  /* the scroll-driven word-reveal carries no meaning without motion */
  .about__statement .w { opacity: 1; }
  .cursor-dot, .cursor-ring { display: none; }
  .grain { animation: none; }
}