/* MATILA demo v2 — Space Grotesk + Manrope (same families as the live matila.net), scroll-driven motion. */
@font-face { font-family: "Space Grotesk Variable"; font-style: normal; font-display: swap; font-weight: 300 700;
  src: url("../fonts/space-grotesk-latin-ext-wght.woff2") format("woff2-variations"), url("../fonts/space-grotesk-latin-ext-wght.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF; }
@font-face { font-family: "Space Grotesk Variable"; font-style: normal; font-display: swap; font-weight: 300 700;
  src: url("../fonts/space-grotesk-latin-wght.woff2") format("woff2-variations"), url("../fonts/space-grotesk-latin-wght.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }
@font-face { font-family: "Manrope Variable"; font-style: normal; font-display: swap; font-weight: 200 800;
  src: url("../fonts/manrope-latin-ext-wght.woff2") format("woff2-variations"), url("../fonts/manrope-latin-ext-wght.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF; }
@font-face { font-family: "Manrope Variable"; font-style: normal; font-display: swap; font-weight: 200 800;
  src: url("../fonts/manrope-latin-wght.woff2") format("woff2-variations"), url("../fonts/manrope-latin-wght.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }

:root {
  --ink: #08090b;
  --ink-2: #101114;
  --ink-3: #16181c;
  --paper: #f1f0ec;
  --white: #ffffff;
  --text: #0e0f11;
  --muted: #5d5f63;
  --muted-d: rgba(255, 255, 255, .62);
  --dim: rgba(255, 255, 255, .42);
  --line: rgba(8, 9, 11, .12);
  --line-d: rgba(255, 255, 255, .11);
  --accent: #9fd9e8;          /* cool light, used sparingly (live site lineage) */
  --accent-l: #47707c;
  --cjk: "PingFang SC", "Source Han Sans SC", "Noto Sans SC", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
  --display: "Space Grotesk Variable", "Space Grotesk", "Helvetica Neue", Arial, var(--cjk);
  --sans: "Manrope Variable", "Manrope", "Helvetica Neue", Arial, var(--cjk);
  --pad: clamp(20px, 4.4vw, 64px);
  --max: 1360px;
  --sec: clamp(96px, 11vw, 168px);
  --ease: cubic-bezier(.2, .7, .1, 1);
  --ease-out: cubic-bezier(.16, 1, .3, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 72px; }
html.motion { scroll-behavior: smooth; }
body { margin: 0; font: 400 17px/1.62 var(--sans); color: var(--text); background: var(--ink); -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; overflow-x: clip; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
button { font: inherit; color: inherit; cursor: pointer; }
h1, h2, h3, p, figure, blockquote, dl, dd, ol, ul { margin: 0; }
ol, ul { padding: 0; list-style: none; }
[hidden] { display: none !important; }
.sr-only { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip-link { position: fixed; left: 12px; top: 12px; transform: translateY(-200%); z-index: 200; background: #fff; color: #000; padding: 10px 14px; border-radius: 6px; }
.skip-link:focus { transform: none; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
[data-theme="light"] :focus-visible { outline-color: var(--accent-l); }

.wrap { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 var(--pad); }

/* ---------- Type ---------- */
.display, .hero__title { font-family: var(--display); font-weight: 500; letter-spacing: -.045em; line-height: .96; }
.display em, .hero__title em { font-style: normal; color: var(--dim); }
[data-theme="light"] .display em { color: rgba(8, 9, 11, .38); }
.h2 { font-size: clamp(42px, 5.8vw, 88px); }
.h3 { font-size: clamp(30px, 3.2vw, 46px); line-height: 1.02; letter-spacing: -.035em; }
.label { font-family: var(--display); font-size: 12px; font-weight: 500; letter-spacing: .2em; text-transform: uppercase; color: var(--muted); display: flex; align-items: center; gap: 12px; }
.label::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--accent-l); box-shadow: 0 0 0 4px rgba(71, 112, 124, .14); }
.label--dark { color: var(--muted-d); }
.label--dark::before { background: var(--accent); box-shadow: 0 0 0 4px rgba(159, 217, 232, .14), 0 0 12px rgba(159, 217, 232, .6); }
.num { font-family: var(--display); font-variant-numeric: tabular-nums; }

/* Chinese: CJK stack for headings, no negative tracking. */
html:lang(zh-Hans) body { letter-spacing: .01em; }
html:lang(zh-Hans) .display, html:lang(zh-Hans) .hero__title { font-family: var(--display); font-weight: 600; letter-spacing: .01em; line-height: 1.16; }
html:lang(zh-Hans) .h2 { font-size: clamp(34px, 4.4vw, 64px); }
html:lang(zh-Hans) .h3 { font-size: clamp(26px, 2.6vw, 38px); }
html:lang(zh-Hans) .hero__title { font-size: clamp(46px, 6.2vw, 100px); }
html:lang(zh-Hans) .label { letter-spacing: .14em; }
html:lang(zh-Hans) .quote { font-size: clamp(28px, 3vw, 44px); }

/* ---------- Buttons & links ---------- */
.btn { display: inline-flex; align-items: center; gap: 12px; min-height: 52px; padding: 0 26px; border-radius: 999px; border: 1px solid transparent; font-family: var(--display); font-size: 13px; font-weight: 500; letter-spacing: .12em; text-transform: uppercase; text-decoration: none; transition: background .3s, color .3s, border-color .3s, box-shadow .4s; will-change: transform; }
html:lang(zh-Hans) .btn { letter-spacing: .06em; font-size: 14px; }
.btn > * { pointer-events: none; }
.btn svg { transition: transform .35s var(--ease); }
.btn:hover svg { transform: translateY(2px); }
.btn small { font-size: 12px; opacity: .6; letter-spacing: .1em; }
.btn--light { background: #f3f4f5; color: var(--ink); }
.btn--light:hover { background: #fff; box-shadow: 0 10px 40px rgba(159, 217, 232, .22); }
.btn--dark { background: var(--ink); color: #fff; }
.btn--dark:hover { background: #1d2024; box-shadow: 0 14px 40px rgba(8, 9, 11, .2); }
.btn--ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,.3); }
.btn--ghost:hover { border-color: #fff; }
.btn--sm { min-height: 42px; padding: 0 20px; font-size: 12px; }
.link { background: none; border: 0; padding: 4px 0; font-family: var(--display); font-size: 13px; font-weight: 500; letter-spacing: .12em; text-transform: uppercase; text-decoration: none; position: relative; }
.link::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 1px; background: currentColor; transform-origin: right; transition: transform .5s var(--ease); }
.link:hover::after { transform: scaleX(0); }
.link--dark { color: rgba(255,255,255,.86); }
.link--dark:hover { color: #fff; }

/* ---------- Generic reveals (motion only) ---------- */
.motion .reveal { opacity: 0; transform: translate3d(0, 28px, 0); transition: opacity 1s var(--ease-out), transform 1.1s var(--ease-out); transition-delay: var(--rd, 0ms); }
.motion .reveal.in { opacity: 1; transform: none; }
.motion .reveal--mask { opacity: 1; clip-path: inset(0 0 100% 0); transform: translate3d(0, .35em, 0); transition: clip-path 1.2s var(--ease-out), transform 1.2s var(--ease-out); transition-delay: var(--rd, 0ms); }
.motion .reveal--mask.in { clip-path: inset(0 0 0 0); transform: none; }
.reveal--mask { padding-bottom: .12em; margin-bottom: -.12em; }
/* Image clip reveal */
.clip { position: relative; }
.clip__in { overflow: hidden; }
.motion .clip__in { clip-path: inset(9% 7% 9% 7% round 28px); transition: clip-path 1.5s var(--ease-out); }
.motion .clip__in > img { transform: scale(1.16); transition: transform 1.8s var(--ease-out); }
.motion .clip.in .clip__in { clip-path: inset(0 0 0 0 round 4px); }
.motion .clip.in .clip__in > img { transform: none; }
.motion .clip figcaption { opacity: 0; transition: opacity 1s .6s; }
.motion .clip.in figcaption { opacity: 1; }

/* ---------- Intro ---------- */
.intro { position: fixed; inset: 0; z-index: 150; background: var(--ink); display: none; place-items: center; transition: opacity .7s ease, visibility .7s; }
.js .intro.is-on { display: grid; }
.intro.is-out { opacity: 0; visibility: hidden; }
.intro__canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.intro__line { position: absolute; left: 0; right: 0; top: calc(50% + clamp(56px, 9vw, 110px)); text-align: center; font-family: var(--display); font-size: 12px; letter-spacing: .32em; text-transform: uppercase; color: rgba(255,255,255,.62); opacity: 0; transition: opacity 1s ease .2s; }
html:lang(zh-Hans) .intro__line { letter-spacing: .3em; font-size: 15px; }
.intro.is-formed .intro__line { opacity: 1; }
.intro__skip { position: absolute; right: var(--pad); bottom: calc(28px + env(safe-area-inset-bottom)); background: none; border: 1px solid rgba(255,255,255,.25); color: rgba(255,255,255,.8); border-radius: 999px; padding: 10px 20px; font-family: var(--display); font-size: 12px; letter-spacing: .16em; text-transform: uppercase; }
.intro__skip:hover { border-color: #fff; color: #fff; }
.intro__bar { position: absolute; left: var(--pad); bottom: calc(48px + env(safe-area-inset-bottom)); width: 120px; height: 1px; background: rgba(255,255,255,.15); }
.intro__bar span { display: block; height: 100%; width: 0; background: rgba(255,255,255,.8); }

/* ---------- Header ---------- */
.header { position: fixed; inset: 0 0 auto; z-index: 100; transition: background .4s, backdrop-filter .4s, border-color .4s, transform .5s var(--ease); border-bottom: 1px solid transparent; }
.header.is-solid { background: rgba(8, 9, 11, .72); -webkit-backdrop-filter: blur(18px) saturate(1.4); backdrop-filter: blur(18px) saturate(1.4); border-color: var(--line-d); }
.header__progress { position: absolute; left: 0; right: 0; bottom: -1px; height: 1px; background: var(--accent); transform-origin: left; transform: scaleX(0); opacity: .8; }
.header__inner { max-width: var(--max); margin: 0 auto; padding: 0 var(--pad); height: 72px; display: flex; align-items: center; gap: 32px; }
.header__logo { position: relative; display: block; }
.header__logo img { height: 22px; width: auto; transition: opacity .35s; }
.header__logo .logo-d { position: absolute; left: 0; top: 0; opacity: 0; }
.header.is-light.is-solid { background: rgba(250, 250, 248, .8); border-color: var(--line); }
.header.is-light .header__progress { background: var(--accent-l); }
.header.is-light.is-solid .logo-w { opacity: 0; }
.header.is-light.is-solid .logo-d { opacity: 1; }
.header.is-light.is-solid .nav a { color: rgba(8,9,11,.6); }
.header.is-light.is-solid .nav a:hover, .header.is-light.is-solid .nav a.is-current { color: var(--ink); }
.header.is-light.is-solid .nav a::after { background: var(--ink); }
.header.is-light.is-solid .lang, .header.is-light.is-solid .lang button { color: rgba(8,9,11,.5); }
.header.is-light.is-solid .lang button[aria-pressed="true"] { color: var(--ink); }
.header.is-light.is-solid .header__cta { background: var(--ink); color: #fff; }
.header.is-light.is-solid .menu-btn__l { background: var(--ink); }
.nav { display: flex; gap: 32px; margin: 0 auto; }
.nav a { font-family: var(--display); font-size: 12px; font-weight: 500; text-transform: uppercase; letter-spacing: .16em; color: rgba(255,255,255,.7); text-decoration: none; position: relative; padding: 6px 0; transition: color .25s; }
html:lang(zh-Hans) .nav a { font-size: 14px; letter-spacing: .08em; }
.nav a::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 1px; background: #fff; transform: scaleX(0); transform-origin: left; transition: transform .45s var(--ease); }
.nav a:hover, .nav a.is-current { color: #fff; }
.nav a:hover::after, .nav a.is-current::after { transform: scaleX(1); }
.header__tools { display: flex; align-items: center; gap: 20px; margin-left: auto; }
.nav + .header__tools { margin-left: 0; }
.lang { display: flex; align-items: center; gap: 6px; color: rgba(255,255,255,.4); font-size: 13px; }
.lang button { background: none; border: 0; padding: 6px 4px; color: rgba(255,255,255,.55); font-family: var(--display); font-size: 12px; letter-spacing: .12em; }
.lang button[aria-pressed="true"] { color: #fff; }
.lang button:hover { color: #fff; }
.menu-btn { display: none; width: 44px; height: 44px; background: none; border: 0; position: relative; margin-right: -10px; }
.menu-btn__l { position: absolute; left: 12px; right: 12px; height: 1.5px; background: #fff; transition: transform .35s var(--ease), top .35s var(--ease); }
.menu-btn__l:nth-of-type(2) { top: 18px; }
.menu-btn__l:nth-of-type(3) { top: 25px; }
.menu-btn[aria-expanded="true"] .menu-btn__l:nth-of-type(2) { top: 21.5px; transform: rotate(45deg); }
.menu-btn[aria-expanded="true"] .menu-btn__l:nth-of-type(3) { top: 21.5px; transform: rotate(-45deg); }

.mmenu { position: fixed; inset: 0; z-index: 90; background: var(--ink); color: #fff; padding: 100px var(--pad) calc(32px + env(safe-area-inset-bottom)); display: flex; flex-direction: column; justify-content: space-between; opacity: 0; transition: opacity .35s ease; overflow-y: auto; }
.mmenu.is-open { opacity: 1; }
.mmenu[hidden] { display: none; }
.mmenu__nav { display: flex; flex-direction: column; }
.mmenu__nav a { font-family: var(--display); font-weight: 500; letter-spacing: -.035em; font-size: 38px; line-height: 1.25; text-decoration: none; padding: 6px 0; border-bottom: 1px solid var(--line-d); }
.motion .mmenu__nav a { opacity: 0; transform: translate3d(0, 16px, 0); transition: opacity .6s var(--ease-out), transform .7s var(--ease-out); }
.motion .mmenu.is-open .mmenu__nav a { opacity: 1; transform: none; }
.mmenu__nav a:nth-child(2) { transition-delay: 40ms; } .mmenu__nav a:nth-child(3) { transition-delay: 80ms; } .mmenu__nav a:nth-child(4) { transition-delay: 120ms; } .mmenu__nav a:nth-child(5) { transition-delay: 160ms; } .mmenu__nav a:nth-child(6) { transition-delay: 200ms; }
html:lang(zh-Hans) .mmenu__nav a { font-size: 28px; line-height: 1.6; letter-spacing: .02em; }
.mmenu__foot { display: flex; flex-direction: column; gap: 18px; margin-top: 32px; }
.lang--lg button { font-size: 14px; padding: 10px 18px; border: 1px solid var(--line-d); border-radius: 999px; }
.lang--lg { gap: 10px; }
.lang--lg button[aria-pressed="true"] { background: #fff; color: var(--ink); border-color: #fff; }
.mmenu__mail { color: var(--muted-d); font-size: 15px; }

/* ---------- Cursor glow (desktop, dark sections) ---------- */
[data-glow] { position: relative; }
.cglow { position: absolute; left: 0; top: 0; width: 720px; height: 720px; margin: -360px 0 0 -360px; border-radius: 50%; pointer-events: none; z-index: 0;
  background: radial-gradient(closest-side, rgba(159, 217, 232, .085), rgba(159, 217, 232, .03) 55%, transparent);
  opacity: 0; transition: opacity .6s ease; will-change: transform; }
[data-glow].is-hot > .cglow, .story__sticky.is-hot > .cglow { opacity: 1; }

/* ---------- Hero ---------- */
.hero { background: var(--ink); color: #fff; padding-top: 72px; overflow: clip; isolation: isolate; }
.hero__bg { position: absolute; inset: 0; pointer-events: none; z-index: -1; }
.hero__halo { position: absolute; width: 72vw; height: 72vw; max-width: 1100px; max-height: 1100px; right: -12vw; top: 50%; margin-top: -36vw; border-radius: 50%;
  background: radial-gradient(closest-side, rgba(120, 140, 170, .22), rgba(80, 96, 128, .08) 55%, transparent); }
.hero__rings { position: absolute; right: 2vw; top: 54%; width: 64vw; max-width: 980px; aspect-ratio: 1 / .32; transform: translateY(-50%); border-radius: 50%; border: 1px solid rgba(255,255,255,.06); }
.hero__rings::after { content: ""; position: absolute; inset: 14% 12%; border-radius: 50%; border: 1px solid rgba(159, 217, 232, .08); }
.motion .hero__rings { animation: ringIn 2.4s var(--ease-out) .6s both; }
@keyframes ringIn { from { opacity: 0; transform: translateY(-50%) scale(.85); } to { opacity: 1; transform: translateY(-50%); } }
.hero__grid { position: relative; display: grid; grid-template-columns: minmax(0, 5.4fr) minmax(0, 6.6fr); align-items: center; min-height: min(calc(100svh - 72px - 124px), 820px); gap: 24px; }
.hero__copy { position: relative; z-index: 2; padding: 48px 0; will-change: transform, opacity; }
.hero__title { font-size: clamp(60px, 7.6vw, 124px); margin: 28px 0 30px; letter-spacing: -.06em; line-height: .9; }
.hero__title .ln { display: block; overflow: hidden; padding: 0 .06em .08em 0; margin-bottom: -.08em; }
.hero__title .ln > span { display: inline-block; }
.hero__lead { font-size: clamp(16px, 1.3vw, 18px); color: var(--muted-d); max-width: 32em; }
.hero__actions { display: flex; align-items: center; gap: 28px; flex-wrap: wrap; margin-top: 40px; }
.hero__media { position: relative; align-self: stretch; display: flex; align-items: center; justify-content: center; margin-right: calc(var(--pad) * -1); will-change: transform; }
.hero__device { position: relative; width: 100%; max-width: calc(min(86svh, 900px) * 1700 / 1544); }
.hero__device img { width: 100%; height: auto; }
/* Light sweep: masked by the product's own alpha so only the device catches the light. */
.sweep { position: absolute; inset: 0; pointer-events: none; overflow: hidden;
  -webkit-mask-image: url("../img/hero-obsidian-1000.webp"); mask-image: url("../img/hero-obsidian-1000.webp");
  -webkit-mask-size: 100% 100%; mask-size: 100% 100%; mix-blend-mode: screen; }
.sweep::before { content: ""; position: absolute; top: -20%; bottom: -20%; left: 0; width: 34%;
  background: linear-gradient(100deg, transparent 0%, rgba(210, 236, 255, .0) 20%, rgba(220, 240, 255, .55) 50%, rgba(210, 236, 255, 0) 80%, transparent);
  transform: translate3d(-120%, 0, 0) skewX(-14deg); }
.motion .sweep::before { animation: sweep 7s var(--ease) 2.2s infinite; }
@keyframes sweep { 0% { transform: translate3d(-120%, 0, 0) skewX(-14deg); } 38%, 100% { transform: translate3d(330%, 0, 0) skewX(-14deg); } }

/* Hero entrance (motion only, starts when html gets .ready after the opening) */
.motion .hero__in { opacity: 0; transform: translate3d(0, 24px, 0); }
.motion .hero__title .ln > span { transform: translate3d(0, 110%, 0) rotate(2deg); transform-origin: left top; }
.motion .hero__device { opacity: 0; transform: translate3d(0, 6%, 0) scale(1.08); }
.motion.ready .hero__in { opacity: 1; transform: none; transition: opacity 1.1s var(--ease-out), transform 1.2s var(--ease-out); transition-delay: calc(var(--i) * 110ms + 150ms); }
.motion.ready .hero__title .ln > span { transform: none; transition: transform 1.25s var(--ease-out); }
.motion.ready .hero__title .ln:nth-child(1) > span { transition-delay: .2s; }
.motion.ready .hero__title .ln:nth-child(2) > span { transition-delay: .34s; }
.motion.ready .hero__device { opacity: 1; transform: none; transition: opacity 1.6s var(--ease-out) .1s, transform 2.2s var(--ease-out) .1s; }

.hero__foot { position: relative; z-index: 2; display: flex; align-items: flex-end; gap: 32px; }
.figures { flex: 1; display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line-d); }
.figures > div { padding: 24px 24px 32px 0; }
.figures > div + div { padding-left: 24px; border-left: 1px solid var(--line-d); }
.figures dt { font-family: var(--display); font-size: 12px; letter-spacing: .16em; text-transform: uppercase; color: var(--muted-d); }
.figures dd { font-family: var(--display); font-weight: 400; font-size: clamp(30px, 2.8vw, 44px); letter-spacing: -.04em; line-height: 1.1; margin-top: 10px; font-variant-numeric: tabular-nums; }
.figures dd small { font-size: .42em; letter-spacing: .04em; color: var(--muted-d); margin-left: 2px; }
html:lang(zh-Hans) .figures dt { letter-spacing: .06em; font-size: 13px; }
.scroll-cue { display: flex; flex-direction: column; align-items: center; gap: 12px; padding-bottom: 32px; font-family: var(--display); font-size: 12px; letter-spacing: .24em; text-transform: uppercase; color: var(--dim); writing-mode: vertical-rl; }
html:lang(zh-Hans) .scroll-cue { font-size: 12px; letter-spacing: .3em; }
.scroll-cue i { width: 1px; height: 54px; background: rgba(255,255,255,.14); position: relative; overflow: hidden; }
.scroll-cue i::after { content: ""; position: absolute; inset: 0; background: var(--accent); transform: translateY(-100%); }
.motion .scroll-cue i::after { animation: cue 2.2s var(--ease) infinite; }
@keyframes cue { 0% { transform: translateY(-100%); } 60%, 100% { transform: translateY(100%); } }

/* ---------- Sections ---------- */
.section { padding: var(--sec) 0; position: relative; }
.section--paper { background: var(--paper); }
.section--white { background: var(--white); }
.section--ink { background: var(--ink); color: #fff; }
.head { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: 24px; align-items: end; margin-bottom: clamp(56px, 7vw, 104px); }
.head .label { grid-column: 1 / -1; }
.head .h2 { grid-column: 1 / span 7; }
.head__body { grid-column: 9 / -1; color: var(--muted); max-width: 30em; }

/* ---------- Story (pinned) ---------- */
.story { background: var(--ink); color: #fff; overflow: clip; }
.story__head { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: 24px; align-items: end; padding-top: var(--sec); padding-bottom: clamp(24px, 4vw, 56px); }
.story__head .label { grid-column: 1 / -1; }
.story__head .h2 { grid-column: 1 / span 7; }
.story__head .head__body { grid-column: 9 / -1; color: var(--muted-d); }
.story__track { position: relative; }
.story__sticky { position: relative; overflow: hidden; padding: 40px 0 64px; }
.story__rings { position: absolute; left: 30%; top: 50%; width: min(80vh, 760px); aspect-ratio: 1; transform: translate(-50%, -50%); border-radius: 50%; border: 1px solid rgba(255,255,255,.05); pointer-events: none;
  background: radial-gradient(closest-side, rgba(110, 130, 160, .16), transparent 70%); }
.story__rings::before, .story__rings::after { content: ""; position: absolute; inset: 12%; border-radius: 50%; border: 1px dashed rgba(159, 217, 232, .08); }
.story__rings::after { inset: 26%; border-style: solid; border-color: rgba(255,255,255,.05); }
.motion .story__rings::before { animation: spin 60s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.story__grid { position: relative; display: grid; grid-template-columns: minmax(0, 6fr) minmax(0, 6fr); gap: clamp(32px, 5vw, 96px); align-items: center; }
.story__visual { position: relative; display: grid; place-items: center; height: min(74vh, 760px); }
.motion .story__float { -webkit-mask-image: linear-gradient(to bottom, #000 82%, transparent); mask-image: linear-gradient(to bottom, #000 82%, transparent); overflow: hidden; width: 100%; }
.story__float { height: 100%; display: grid; place-items: center; will-change: transform; }
.story__device { position: relative; height: 100%; aspect-ratio: 800 / 1254; transition: transform 1.2s var(--ease-out); transform-origin: 50% 20%; }
.story__device img { width: 100%; height: 100%; object-fit: contain; }
.story__ring { position: absolute; left: 28.5%; top: 3.6%; width: 44%; height: 24.4%; border-radius: 14px; border: 1px solid var(--accent); box-shadow: 0 0 24px rgba(159, 217, 232, .35), inset 0 0 18px rgba(159, 217, 232, .15); opacity: 0; transform: scale(1.1); transition: opacity .6s, transform .8s var(--ease-out); }
.story[data-step="3"] .story__device { transform: scale(1.55) translateY(14%); }
.story[data-step="3"] .story__ring { opacity: 1; transform: none; transition-delay: .5s; }
.lens { position: absolute; right: 0; bottom: 6%; width: clamp(150px, 15vw, 230px); aspect-ratio: 1; transition: opacity .6s, transform .9s var(--ease-out); }
.lens__win { position: absolute; inset: 6px; border-radius: 50%; overflow: hidden; background: var(--ink-2); box-shadow: 0 24px 60px rgba(0,0,0,.55), 0 0 0 1px rgba(255,255,255,.08); }
.lens__win img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0; transform: scale(1.2); transition: opacity .8s var(--ease-out), transform 1.4s var(--ease-out); }
.lens__win img.is-active { opacity: 1; transform: none; }
.lens__arc { position: absolute; inset: 0; width: 100%; height: 100%; transform: rotate(-90deg); }
.lens__arc circle { fill: none; stroke: var(--accent); stroke-width: .8; stroke-dasharray: 100; stroke-dashoffset: calc(100 - var(--lp, 0) * 100); opacity: .85; }
.story[data-step="3"] .lens { opacity: 0; transform: scale(.85); }
.story__steps { position: relative; min-height: 360px; padding-left: 40px; }
.story__rail { position: absolute; left: 0; top: 6px; bottom: 6px; width: 1px; background: var(--line-d); }
.story__rail span { position: absolute; inset: 0; background: var(--accent); transform-origin: top; transform: scaleY(0); box-shadow: 0 0 10px rgba(159, 217, 232, .6); }
.step { position: absolute; left: 40px; right: 0; top: 50%; transform: translate3d(0, calc(-50% + 30px), 0); opacity: 0; visibility: hidden; transition: opacity .6s var(--ease-out), transform .9s var(--ease-out), visibility 0s .9s; }
.step.is-active { opacity: 1; visibility: visible; transform: translate3d(0, -50%, 0); transition: opacity .9s var(--ease-out) .12s, transform 1.1s var(--ease-out) .12s, visibility 0s; }
.step.is-past { transform: translate3d(0, calc(-50% - 30px), 0); }
.step__tag { display: flex; gap: 14px; font-family: var(--display); font-size: 12px; letter-spacing: .2em; text-transform: uppercase; color: var(--muted-d); }
.step__tag span:first-child { color: var(--accent); }
.step__big { font-family: var(--display); font-weight: 400; font-size: clamp(64px, 7.4vw, 124px); letter-spacing: -.06em; line-height: .95; margin: 22px 0 26px; white-space: nowrap; font-variant-numeric: tabular-nums; }
.step__big small { font-size: .3em; letter-spacing: -.01em; color: var(--muted-d); }
.step__h { font-family: var(--display); font-weight: 500; font-size: clamp(22px, 1.9vw, 28px); letter-spacing: -.02em; line-height: 1.2; margin-bottom: 14px; }
.step__p { color: var(--muted-d); max-width: 30em; }
.story__nav { position: relative; margin-top: 8px; }
.story__dots { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line-d); }
.story__dots button { width: 100%; display: flex; gap: 12px; align-items: baseline; background: none; border: 0; padding: 18px 12px 4px 0; text-align: left; color: rgba(255,255,255,.4); font-family: var(--display); font-size: 12px; letter-spacing: .16em; text-transform: uppercase; position: relative; transition: color .4s; }
.story__dots button::before { content: ""; position: absolute; left: 0; right: 12px; top: -1px; height: 1px; background: #fff; transform: scaleX(0); transform-origin: left; transition: transform .7s var(--ease-out); }
.story__dots button[aria-current="step"] { color: #fff; }
.story__dots button[aria-current="step"]::before { transform: scaleX(1); }
.story__dots button:hover { color: rgba(255,255,255,.8); }
html:lang(zh-Hans) .story__dots button { letter-spacing: .06em; font-size: 13px; }
/* Pinned mode (motion + JS only) */
.motion .story__track { height: 420vh; }
.motion .story__sticky { position: sticky; top: 0; height: 100vh; height: 100svh; display: flex; flex-direction: column; justify-content: center; padding: 72px 0 24px; }
/* Static mode (reduced motion / no JS): steps as a list. */
html:not(.motion) .story__steps { min-height: 0; padding-left: 0; display: grid; gap: 40px; }
html:not(.motion) .step { position: static; opacity: 1; visibility: visible; transform: none; padding-left: 24px; border-left: 1px solid var(--line-d); }
html:not(.motion) .story__rail, html:not(.motion) .lens, html:not(.motion) .story__nav { display: none; }
html:not(.motion) .story__visual { position: sticky; top: 90px; align-self: start; }

/* ---------- Interface preview ---------- */
.ui-sec { padding-top: clamp(48px, 6vw, 96px); overflow: clip; }
.ui { position: relative; z-index: 1; padding-top: clamp(48px, 6vw, 80px); border-top: 1px solid var(--line-d); display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(32px, 5vw, 80px); align-items: center; }
.ui__intro .h3 { margin: 22px 0 20px; }
.ui__intro p { color: var(--muted-d); max-width: 30em; }
.ui__note { margin-top: 20px; font-size: 14px; padding-left: 14px; border-left: 1px solid var(--accent); color: rgba(255,255,255,.55) !important; }
.ui__demo { display: grid; grid-template-columns: 220px 1fr; gap: clamp(28px, 4vw, 56px); align-items: center; background: linear-gradient(160deg, rgba(255,255,255,.04), rgba(255,255,255,.01)); border: 1px solid var(--line-d); border-radius: 20px; padding: clamp(24px, 3.4vw, 48px); }
.screen { aspect-ratio: 3 / 4.1; border-radius: 18px; background: linear-gradient(160deg, #1a1630, #0d0c16 60%); border: 8px solid #1b1c1f; box-shadow: 0 0 0 1px #2b2c30, 0 30px 60px rgba(0,0,0,.5); padding: 16px 14px 14px; display: flex; flex-direction: column; color: #fff; position: relative; overflow: hidden; font-family: var(--display); }
.screen__top { display: flex; justify-content: space-between; font-size: 13px; color: rgba(255,255,255,.7); }
.screen__val { font-size: 62px; font-weight: 300; line-height: 1.05; margin-top: 8px; font-variant-numeric: tabular-nums; letter-spacing: -.04em; }
.screen__mode { display: flex; align-items: center; gap: 8px; font-size: 13px; color: rgba(255,255,255,.8); margin-top: 6px; }
.screen__mode i { width: 7px; height: 7px; border-radius: 50%; background: #9d8cff; box-shadow: 0 0 10px #9d8cff; }
.motion .screen[data-mode="pulse"] .screen__mode i { animation: blink 1s steps(2, start) infinite; }
@keyframes blink { 50% { opacity: .15; } }
.screen__bars { display: flex; gap: 4px; align-items: flex-end; height: 40px; margin-top: auto; margin-bottom: 12px; }
.screen__bars span { flex: 1; background: rgba(157, 140, 255, .22); border-radius: 2px; height: 100%; transition: background .3s; }
.screen__bars span.on { background: #8f7cf6; }
.screen__btns { display: grid; grid-template-columns: 1fr 1fr; border-radius: 6px; overflow: hidden; font-size: 13px; text-align: center; }
.screen__btns span { padding: 8px 0; background: rgba(255,255,255,.08); }
.screen__btns span.on { background: #7e6be8; }
.ui__controls { display: flex; flex-direction: column; gap: 26px; min-width: 0; }
.ctl__head { display: flex; justify-content: space-between; align-items: baseline; font-size: 14px; color: var(--muted-d); margin-bottom: 12px; letter-spacing: .03em; }
.ctl__head output { font-family: var(--display); font-size: 28px; letter-spacing: -.03em; color: #fff; font-variant-numeric: tabular-nums; }
.ctl__row { display: grid; grid-template-columns: 44px 1fr 44px; gap: 12px; align-items: center; }
.step-btn { width: 44px; height: 44px; border-radius: 50%; border: 1px solid var(--line-d); background: none; font-size: 20px; line-height: 1; transition: border-color .3s, background .3s; }
.step-btn:hover { border-color: #fff; background: rgba(255,255,255,.06); }
input[type=range] { -webkit-appearance: none; appearance: none; width: 100%; background: transparent; height: 44px; margin: 0; }
input[type=range]::-webkit-slider-runnable-track { height: 2px; background: linear-gradient(to right, var(--accent) var(--p, 33%), rgba(255,255,255,.18) var(--p, 33%)); }
input[type=range]::-webkit-slider-thumb { -webkit-appearance: none; width: 22px; height: 22px; border-radius: 50%; background: #fff; margin-top: -10px; box-shadow: 0 2px 10px rgba(0,0,0,.4), 0 0 0 6px rgba(159, 217, 232, .12); }
input[type=range]::-moz-range-track { height: 2px; background: rgba(255,255,255,.18); }
input[type=range]::-moz-range-progress { height: 2px; background: var(--accent); }
input[type=range]::-moz-range-thumb { width: 22px; height: 22px; border: 0; border-radius: 50%; background: #fff; }
.ctl__scale { display: flex; justify-content: space-between; padding: 0 56px; font-size: 12px; color: rgba(255,255,255,.4); font-family: var(--display); }
.seg { display: grid; grid-template-columns: 1fr 1fr; border: 1px solid var(--line-d); border-radius: 999px; padding: 4px; }
.seg button { background: none; border: 0; border-radius: 999px; min-height: 42px; font-size: 15px; color: rgba(255,255,255,.7); transition: background .3s, color .3s; }
.seg button[aria-pressed="true"] { background: #fff; color: var(--ink); }
.schem { width: 100%; height: auto; }
.schem__head { fill: #2a2b2f; }
.schem__surface { stroke: rgba(255,255,255,.35); stroke-dasharray: 3 4; }
.schem line.n { stroke: #c9d6db; stroke-width: 1.5; transition: all .5s var(--ease); }
.schem__cap { font-size: 13px; color: rgba(255,255,255,.45); margin-top: -14px; }
.ui__foot { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-top: -14px; }
.ui__foot .schem__cap { margin-top: 0; }
.snd { flex: none; display: inline-flex; align-items: center; gap: 6px; min-height: 32px; padding: 0 10px 0 8px; border: 1px solid transparent; border-radius: 999px; background: none; color: rgba(255,255,255,.45); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; font-family: var(--display); transition: color .3s, border-color .3s; }
.snd:hover, .snd:focus-visible { color: #fff; border-color: var(--line-d); }
.snd svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 1.4; stroke-linecap: round; stroke-linejoin: round; }
.snd .snd__off { display: none; }
.snd[aria-pressed="false"] .snd__on { display: none; }
.snd[aria-pressed="false"] .snd__off { display: inline; }

/* ---------- System ---------- */
.system { display: grid; grid-template-columns: minmax(0, 7.4fr) minmax(0, 4.6fr); gap: clamp(32px, 5vw, 80px); align-items: center; }
.system__media img { width: 100%; }
.system__media figcaption, .about__media figcaption { margin-top: 14px; font-size: 14px; color: var(--muted); }
.parts { border-top: 1px solid var(--line); }
.parts li { display: grid; grid-template-columns: 52px 1fr; gap: 12px; padding: 28px 0; border-bottom: 1px solid var(--line); position: relative; }
.parts li::after { content: ""; position: absolute; left: 0; right: 0; bottom: -1px; height: 1px; background: var(--ink); transform: scaleX(0); transform-origin: left; transition: transform .8s var(--ease-out); }
.parts li:hover::after { transform: scaleX(1); }
.parts__n { font-family: var(--display); font-size: 14px; letter-spacing: .1em; color: var(--accent-l); line-height: 1.9; }
.parts h3 { font-family: var(--display); font-size: 22px; font-weight: 500; letter-spacing: -.02em; margin-bottom: 6px; }
.parts p { color: var(--muted); font-size: 16px; }
.duo { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: clamp(64px, 8vw, 120px); }
.duo__item { background: #fff; border-radius: 20px; overflow: hidden; }
.duo__img { overflow: hidden; }
.duo__img img { width: 100%; aspect-ratio: 1100 / 772; object-fit: cover; transition: transform 1.2s var(--ease-out); }
.duo__item:hover .duo__img img { transform: scale(1.04); }
.duo__item figcaption { padding: 4px 28px 28px; display: flex; flex-direction: column; gap: 4px; }
.duo__item strong { font-family: var(--display); font-weight: 500; font-size: 19px; letter-spacing: -.015em; }
.duo__item span { color: var(--muted); font-size: 15.5px; }
@supports (animation-timeline: view()) {
  .motion .system__media .clip__in { animation: none; }
  .motion .system__media img { animation: drift linear both; animation-timeline: view(); animation-range: entry 0% exit 100%; }
  @keyframes drift { from { translate: 0 -3%; } to { translate: 0 3%; } }
}

/* Card tilt / lift (desktop pointer) */
.card { transition: transform .7s var(--ease-out), box-shadow .7s var(--ease-out); transform: perspective(900px) rotateX(var(--ry, 0deg)) rotateY(var(--rx, 0deg)) translate3d(0, var(--lift, 0px), 0); }
.motion .card.reveal { transition: opacity 1s var(--ease-out), transform 1.1s var(--ease-out), box-shadow .7s var(--ease-out); }
.motion .card.reveal.in { transform: perspective(900px) rotateX(var(--ry, 0deg)) rotateY(var(--rx, 0deg)) translate3d(0, var(--lift, 0px), 0); }
.fine .card.is-tilt { --lift: -6px; box-shadow: 0 30px 60px rgba(8, 9, 11, .12); transition: transform .25s ease-out, box-shadow .7s var(--ease-out), opacity 1s; }

/* ---------- Gallery strip ---------- */
.gallery { background: var(--ink); color: #fff; padding: 0 0 var(--sec); overflow: clip; }
.ticker { border-bottom: 1px solid var(--line-d); overflow: hidden; padding: 22px 0; position: relative; z-index: 1; }
.ticker__run { display: flex; width: max-content; }
.ticker__run span { font-family: var(--display); font-size: clamp(22px, 2.4vw, 34px); letter-spacing: -.03em; color: rgba(255,255,255,.5); padding: 0 28px; display: flex; align-items: center; gap: 28px; white-space: nowrap; }
.ticker__run span b { font-weight: inherit; }
.ticker__run span::after { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); opacity: .7; margin-left: 28px; }
.motion .ticker__run { animation: ticker 38s linear infinite; }
.ticker:hover .ticker__run { animation-play-state: paused; }
@keyframes ticker { to { transform: translate3d(-50%, 0, 0); } }
.gallery__head { position: relative; z-index: 1; padding-top: clamp(80px, 9vw, 140px); margin-bottom: clamp(40px, 5vw, 72px); display: flex; flex-direction: column; gap: 24px; }
.gallery__viewport { position: relative; z-index: 1; overflow: hidden; }
.gallery__track { display: flex; gap: clamp(14px, 1.6vw, 24px); padding: 0 var(--pad); width: max-content; will-change: transform; }
.tile { width: clamp(240px, 26vw, 380px); flex: none; }
.tile__img { border-radius: 18px; overflow: hidden; aspect-ratio: 4 / 5; background: #fff; }
.tile__img img { width: 100%; height: 100%; object-fit: cover; transition: transform 1.2s var(--ease-out); }
.tile:hover .tile__img img { transform: scale(1.05); }
.tile p { display: flex; gap: 14px; margin-top: 14px; font-family: var(--display); font-size: 12px; letter-spacing: .16em; text-transform: uppercase; color: var(--muted-d); }
.tile p span:first-child { color: var(--accent); }
html:lang(zh-Hans) .tile p { letter-spacing: .06em; font-size: 13px; }
.fine .gallery .card.is-tilt { box-shadow: none; }
html:not(.motion) .gallery__viewport { overflow-x: auto; }

/* ---------- Finishes ---------- */
.finishes-sec { overflow: clip; isolation: isolate; }
.finishes__glow { position: absolute; inset: 0; z-index: -1; pointer-events: none; }
.finishes__glow span { position: absolute; inset: 0; opacity: 0; transition: opacity 1.4s var(--ease); }
.finishes__glow span[data-finish="obsidian"] { background: radial-gradient(48% 60% at 28% 52%, #dfe3ea, #f4f5f7 60%, #fff); }
.finishes__glow span[data-finish="pearl"] { background: radial-gradient(48% 60% at 28% 52%, #eceae6, #f8f7f5 60%, #fff); }
.finishes__glow span[data-finish="champagne"] { background: radial-gradient(48% 60% at 28% 52%, #efe3cf, #faf6ef 60%, #fff); }
.finishes-sec[data-finish="obsidian"] .finishes__glow span[data-finish="obsidian"],
.finishes-sec[data-finish="pearl"] .finishes__glow span[data-finish="pearl"],
.finishes-sec[data-finish="champagne"] .finishes__glow span[data-finish="champagne"] { opacity: 1; }
.finishes { display: grid; grid-template-columns: minmax(0, 6.4fr) minmax(0, 5.6fr); gap: clamp(32px, 6vw, 112px); align-items: center; }
.finishes__stage { width: 100%; max-width: calc(86svh * 1100 / 1342); margin: 0 auto; mix-blend-mode: multiply; }
.finishes__stage .clip__in { position: relative; aspect-ratio: 1100 / 1342; }
.finishes__stage img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; opacity: 0; transform: translate3d(6%, 0, 0) rotate(3deg) scale(.96); transform-origin: 50% 90%; transition: opacity .9s var(--ease-out), transform 1.4s var(--ease-out); }
.finishes__stage img.is-active { opacity: 1; transform: none; }
.finishes__stage img.is-leaving { opacity: 0; transform: translate3d(-6%, 0, 0) rotate(-3deg) scale(.96); }
.motion .finishes__stage .clip__in > img { transform: translate3d(6%, 0, 0) rotate(3deg) scale(.96); transition: opacity .9s var(--ease-out), transform 1.4s var(--ease-out); }
.motion .finishes__stage.in .clip__in > img:not(.is-active):not(.is-leaving) { transform: translate3d(6%, 0, 0) rotate(3deg) scale(.96); }
.motion .finishes__stage .clip__in > img.is-active { transform: scale(1.1); }
.motion .finishes__stage.in .clip__in > img.is-active { transform: none; }
.motion .finishes__stage.in .clip__in > img.is-leaving { transform: translate3d(-6%, 0, 0) rotate(-3deg) scale(.96); }
.finishes__copy .h2 { margin: 24px 0 48px; }
.swatches { display: flex; gap: 10px; flex-wrap: wrap; }
.swatches button { position: relative; overflow: hidden; display: inline-flex; align-items: center; gap: 10px; min-height: 48px; padding: 0 20px 0 10px; border: 1px solid var(--line); background: rgba(255,255,255,.7); border-radius: 999px; font-family: var(--display); font-size: 14px; letter-spacing: .02em; transition: border-color .3s, background .3s; }
.swatches button:hover { border-color: rgba(0,0,0,.35); }
.swatches button[aria-pressed="true"] { border-color: var(--ink); background: #fff; }
.swatches i { width: 28px; height: 28px; border-radius: 50%; background: var(--c); box-shadow: inset 0 0 0 1px rgba(0,0,0,.12), inset 0 -6px 10px rgba(0,0,0,.12), inset 0 6px 10px rgba(255,255,255,.25); transition: transform .5s var(--ease-out); }
.swatches button[aria-pressed="true"] i { transform: scale(1.08); }
.swatch__timer { position: absolute; left: 18px; right: 18px; bottom: 6px; height: 1px; background: var(--ink); transform: scaleX(0); transform-origin: left; opacity: 0; }
.is-cycling .swatches button[aria-pressed="true"] .swatch__timer { opacity: .5; animation: timer 4.6s linear both; }
.is-cycling.is-paused .swatches button[aria-pressed="true"] .swatch__timer { animation-play-state: paused; }
@keyframes timer { to { transform: scaleX(1); } }
.finish-info { margin-top: 48px; padding-top: 32px; border-top: 1px solid var(--line); min-height: 190px; }
.finish-info > * { transition: opacity .35s ease, transform .45s var(--ease-out); }
.finish-info.is-swapping > * { opacity: 0; transform: translateY(10px); }
.finish-info__k { font-family: var(--display); font-size: 12px; letter-spacing: .18em; text-transform: uppercase; color: var(--muted); }
.finish-info__name { font-family: var(--display); font-weight: 500; letter-spacing: -.05em; font-size: clamp(48px, 5vw, 76px); line-height: 1.05; margin: 10px 0 12px; }
.finish-info__zh { font-family: var(--cjk); letter-spacing: .04em; font-weight: 500; font-size: .34em; color: var(--muted); vertical-align: middle; margin-left: 10px; }
.finish-info__line { font-size: 18px; color: var(--muted); }
.finishes__note { margin-top: 28px; font-size: 14px; color: var(--muted); }

/* ---------- About ---------- */
.about { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(32px, 7vw, 120px); align-items: center; }
.about__media .clip__in { border-radius: 4px; }
.about__media img { width: 100%; }
.quote { font-size: clamp(34px, 4vw, 60px); line-height: 1.04; margin: 26px 0 32px; }
.about__body { color: var(--muted); max-width: 36em; }
.who { margin-top: 48px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.who li { padding: 22px 22px 24px; border-radius: 18px; background: rgba(255,255,255,.6); border: 1px solid var(--line); }
.who h3 { font-family: var(--display); font-size: 19px; font-weight: 500; letter-spacing: -.015em; margin-bottom: 8px; }
.who p { font-size: 15px; color: var(--muted); }

/* ---------- Specs ---------- */
.specs { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(32px, 6vw, 112px); align-items: start; }
.specs__intro .h2 { margin: 24px 0 32px; }
.specs__disc { color: var(--muted); font-size: 15.5px; max-width: 30em; margin-bottom: 36px; }
.spec-table { width: 100%; border-collapse: collapse; font-size: 17px; }
.spec-table tr { border-bottom: 1px solid var(--line); transition: background .3s; }
.spec-table tr:hover { background: rgba(8, 9, 11, .025); }
.spec-table tr:first-child { border-top: 1px solid var(--ink); }
.spec-table th { text-align: left; font-weight: 400; color: var(--muted); padding: 20px 24px 20px 0; width: 48%; vertical-align: top; }
.spec-table td { padding: 20px 0; font-family: var(--display); font-weight: 500; letter-spacing: -.005em; font-variant-numeric: tabular-nums; }
html:lang(zh-Hans) .spec-table td { font-family: var(--display); }
.motion .spec-table.reveal tr { opacity: 0; transform: translate3d(0, 12px, 0); transition: opacity .7s var(--ease-out), transform .8s var(--ease-out); }
.motion .spec-table.reveal.in tr { opacity: 1; transform: none; }
.spec-table tr:nth-child(2) { transition-delay: 50ms; } .spec-table tr:nth-child(3) { transition-delay: 100ms; } .spec-table tr:nth-child(4) { transition-delay: 150ms; } .spec-table tr:nth-child(5) { transition-delay: 200ms; } .spec-table tr:nth-child(6) { transition-delay: 250ms; } .spec-table tr:nth-child(7) { transition-delay: 300ms; } .spec-table tr:nth-child(8) { transition-delay: 350ms; } .spec-table tr:nth-child(9) { transition-delay: 400ms; }
.motion .spec-table.reveal { opacity: 1; transform: none; }
.faq { margin-top: clamp(80px, 9vw, 140px); display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); column-gap: clamp(32px, 6vw, 112px); }
.faq__title { grid-column: 1; grid-row: 1 / span 3; font-family: var(--display); font-weight: 500; letter-spacing: -.035em; font-size: clamp(30px, 3vw, 44px); }
html:lang(zh-Hans) .faq__title { letter-spacing: .01em; font-size: clamp(24px, 2.4vw, 34px); }
.faq details { grid-column: 2; border-bottom: 1px solid var(--line); }
.faq details:first-of-type { border-top: 1px solid var(--line); }
.faq summary { list-style: none; cursor: pointer; padding: 22px 40px 22px 0; font-family: var(--display); font-size: 18px; font-weight: 500; letter-spacing: -.01em; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 4px; top: 18px; font-size: 24px; font-weight: 300; transition: transform .4s var(--ease-out); }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { padding: 0 40px 24px 0; color: var(--muted); }
.motion .faq details[open] p { animation: fadeDown .5s var(--ease-out); }
@keyframes fadeDown { from { opacity: 0; transform: translateY(-6px); } to { opacity: 1; transform: none; } }

/* ---------- Contact ---------- */
.contact { overflow: clip; isolation: isolate; }
.contact__grid { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(40px, 7vw, 120px); align-items: start; }
.contact__intro .h2 { margin: 24px 0 28px; }
.contact__intro > p { color: var(--muted-d); max-width: 28em; }
.contact__direct { margin-top: 44px; display: flex; flex-direction: column; gap: 6px; font-size: 14px; color: var(--muted-d); }
.contact__direct a { font-family: var(--display); font-size: 22px; letter-spacing: -.02em; color: #fff; text-decoration: none; border-bottom: 1px solid rgba(255,255,255,.3); align-self: flex-start; padding-bottom: 2px; transition: border-color .3s; }
.contact__direct a:hover { border-color: var(--accent); }
.form-card { background: linear-gradient(160deg, rgba(255,255,255,.045), rgba(255,255,255,.015)); border: 1px solid var(--line-d); border-radius: 20px; padding: clamp(24px, 3.4vw, 48px); }
form { display: grid; grid-template-columns: 1fr 1fr; gap: 22px 20px; }
.field { display: flex; flex-direction: column; gap: 8px; min-width: 0; border: 0; padding: 0; margin: 0; }
.field--full { grid-column: 1 / -1; }
.field label, .field legend { font-size: 14px; color: var(--muted-d); letter-spacing: .02em; padding: 0; }
.field legend { margin-bottom: 10px; }
.field input[type=text], .field input[type=email], .field textarea { width: 100%; background: transparent; border: 0; border-bottom: 1px solid rgba(255,255,255,.22); color: #fff; font: inherit; font-size: 17px; padding: 10px 0; border-radius: 0; transition: border-color .25s; }
.field textarea { resize: vertical; min-height: 96px; }
.field input:focus, .field textarea:focus { outline: none; border-color: var(--accent); }
.field textarea::placeholder { color: rgba(255,255,255,.32); }
.field.has-error input, .field.has-error input:focus { border-color: #e59b8f; }
.err { display: none; font-size: 14px; color: #f0b2a8; }
.field.has-error .err { display: block; }
.chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chips label { position: relative; }
.chips input { position: absolute; opacity: 0; inset: 0; cursor: pointer; }
.chips span { display: inline-flex; align-items: center; min-height: 42px; padding: 0 16px; border-radius: 999px; border: 1px solid var(--line-d); font-size: 15px; color: rgba(255,255,255,.75); transition: all .25s; }
.chips label:hover span { border-color: rgba(255,255,255,.4); }
.chips input:checked + span { background: #fff; color: var(--ink); border-color: #fff; }
.chips input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 2px; }
.form__foot { display: flex; align-items: center; gap: 24px; flex-wrap: wrap; margin-top: 8px; }
.form__note { font-size: 14px; color: rgba(255,255,255,.5); max-width: 26em; }
.done { outline: none; }
.motion .done:not([hidden]) { animation: fadeDown .7s var(--ease-out); }
.done__mark { display: grid; place-items: center; width: 48px; height: 48px; border-radius: 50%; border: 1px solid var(--accent); color: var(--accent); margin-bottom: 24px; }
.done .h3 { margin-bottom: 16px; }
.done > p { color: var(--muted-d); }
.done__text { white-space: pre-wrap; word-break: break-word; font: 14px/1.6 var(--sans); color: rgba(255,255,255,.75); background: rgba(255,255,255,.04); border: 1px solid var(--line-d); border-radius: 10px; padding: 18px; margin: 24px 0; max-height: 260px; overflow: auto; }
.done__actions { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }

/* ---------- Footer ---------- */
.footer { background: var(--ink); color: rgba(255,255,255,.7); border-top: 1px solid var(--line-d); padding: 72px 0 calc(32px + env(safe-area-inset-bottom)); font-size: 15px; }
.footer__grid { display: grid; grid-template-columns: 2fr 1.4fr 1fr; gap: 40px 32px; }
.footer__brand img { height: 26px; width: auto; }
.footer__brand p { margin-top: 18px; font-family: var(--display); font-size: 12px; letter-spacing: .2em; color: rgba(255,255,255,.45); }
.footer__k { font-family: var(--display); font-size: 12px; letter-spacing: .2em; text-transform: uppercase; color: rgba(255,255,255,.4); margin-bottom: 12px; }
.footer__col p + p { margin-top: 4px; }
.footer__col a { text-decoration: none; border-bottom: 1px solid rgba(255,255,255,.25); }
.footer__col a:hover { color: #fff; }
.footer__legal { grid-column: 1 / -1; font-size: 14px; color: rgba(255,255,255,.45); padding: 32px 30% 0 0; border-top: 1px solid var(--line-d); }
.footer__base { grid-column: 1 / -1; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: 13px; color: rgba(255,255,255,.4); }
.footer__base a { text-decoration: none; }
.footer__base a:hover { color: #fff; }

/* ---------- Responsive ---------- */
@media (max-width: 1180px) {
  .nav { gap: 22px; }
  .header__inner { gap: 24px; }
}
@media (max-width: 1024px) {
  .nav, .header__tools > .lang, .header__cta { display: none; }
  .menu-btn { display: block; }
  .nav + .header__tools { margin-left: auto; }
  .head .h2, .story__head .h2 { grid-column: 1 / span 10; }
  .head__body, .story__head .head__body { grid-column: 1 / span 9; }
  .ui { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .footer__brand { grid-column: 1 / -1; }
  .story__grid { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }
  .scroll-cue { display: none; }
}
@media (max-width: 860px) {
  body { font-size: 16px; }
  .footer__legal { padding-right: 0; }
  .hero__grid { grid-template-columns: 1fr; min-height: 0; gap: 0; }
  .hero__copy { padding: 36px 0 0; }
  .hero__title { font-size: clamp(52px, 14.6vw, 84px); margin: 22px 0 22px; }
  html:lang(zh-Hans) .hero__title { font-size: clamp(42px, 11.6vw, 64px); }
  .hero__actions { margin-top: 28px; gap: 22px; }
  .hero__media { margin: 0 calc(var(--pad) * -1); }
  .hero__device { max-width: calc(56svh * 1700 / 1544); margin: 0 auto; }
  .hero__halo { width: 140vw; height: 140vw; right: -40vw; top: 70%; margin-top: -70vw; }
  .hero__rings { width: 120vw; right: -10vw; top: 76%; }
  .figures { grid-template-columns: 1fr 1fr; }
  .figures > div { padding: 18px 12px 20px 0; }
  .figures > div + div { padding-left: 0; border-left: 0; }
  .figures > div:nth-child(even) { padding-left: 18px; border-left: 1px solid var(--line-d); }
  .figures > div:nth-child(n+3) { border-top: 1px solid var(--line-d); }
  .head, .story__head { grid-template-columns: 1fr; }
  .head .h2, .head__body, .story__head .h2, .story__head .head__body { grid-column: 1; }
  .system, .finishes, .about, .specs, .contact__grid, .faq { grid-template-columns: 1fr; }
  .duo { grid-template-columns: 1fr; gap: 16px; }
  .duo__item figcaption { padding: 0 20px 22px; }
  .ui__demo { grid-template-columns: 1fr; justify-items: stretch; }
  .screen { width: min(220px, 62%); margin: 0 auto; }
  .finishes__stage { max-width: calc(60svh * 1100 / 1342); }
  .finishes__copy .h2 { margin: 20px 0 32px; }
  .finish-info { margin-top: 32px; min-height: 0; }
  .who { grid-template-columns: 1fr; margin-top: 36px; }
  .about__media { max-width: 520px; }
  .faq__title { grid-row: auto; margin-bottom: 20px; }
  .faq details { grid-column: 1; }
  form { grid-template-columns: 1fr; }
  .spec-table { font-size: 16px; }
  .spec-table th { width: 50%; padding-right: 16px; }
  .tile { width: 68vw; }
  /* Story on small screens: visual on top, copy below, inside the pinned frame. */
  .story__grid { grid-template-columns: 1fr; gap: 12px; align-items: start; }
  .story__visual { height: 40svh; }
  .lens { width: 112px; right: 4%; bottom: 0; }
  .story__steps { min-height: 0; padding-left: 22px; }
  .motion .story__steps { height: calc(100svh - 72px - 40svh - 96px); min-height: 250px; }
  .step { left: 22px; top: 0; transform: translate3d(0, 24px, 0); }
  .step.is-active { transform: none; }
  .step.is-past { transform: translate3d(0, -24px, 0); }
  .step__big { font-size: clamp(48px, 13vw, 72px); margin: 12px 0 14px; }
  .step__h { font-size: 20px; margin-bottom: 8px; }
  .step__p { font-size: 15px; line-height: 1.55; }
  .story__nav { display: none; }
  .motion .story__sticky { padding: 80px 0 16px; justify-content: flex-start; }
  .story__rings { left: 50%; top: 32%; width: 90vw; }
  html:not(.motion) .story__visual { position: relative; top: 0; height: 52svh; }
}
@media (max-width: 420px) {
  .h2 { font-size: 44px; }
  html:lang(zh-Hans) .h2 { font-size: 34px; }
  .mmenu__nav a { font-size: 34px; }
  .swatches button { padding: 0 14px 0 8px; font-size: 13px; }
  .footer__grid { grid-template-columns: 1fr; }
  .step__p { font-size: 14.5px; }
}
@media (max-height: 640px) and (min-width: 861px) {
  .step__big { font-size: clamp(56px, 6vw, 90px); margin: 14px 0 16px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; }
}