/* Beehive Cluster website. One dark theme (deep space, honey accent), system fonts, no external requests.
   Radius rule: media and panels 20px, small media 12px, every interactive control is a full pill.
   Z-index scale: 10 canvas layers, 40 sticky chapter bar, 50 site nav, 60 mobile menu. */

:root {
  --bg: #08070b;
  --bg-raise: #0f0c11;
  --bg-card: #141016;
  --line: rgba(255, 232, 196, 0.09);
  --line-strong: rgba(255, 232, 196, 0.17);
  --text: #f5ecdc;
  --text-2: #bdb09c;
  --text-3: #92877a;
  --honey: #ffc14d;
  --honey-2: #ffdc85;
  --honey-ink: #1c1306;
  --honey-glow: rgba(255, 176, 60, 0.16);
  --radius: 20px;
  --radius-sm: 12px;
  --max: 1240px;
  --narrow: 820px;
  --gutter: clamp(16px, 4vw, 40px);
  --nav-h: 64px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-padding-top: calc(var(--nav-h) + 24px); }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 var(--font);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
:lang(zh) body { line-height: 1.75; }
img, video, canvas, svg { display: block; max-width: 100%; }
img { height: auto; }
a { color: inherit; text-decoration: none; }
p { margin: 0; }
h1, h2, h3, h4 { margin: 0; font-weight: 680; color: var(--text); text-wrap: balance; }
p, li, dd { text-wrap: pretty; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
:focus-visible { outline: 2px solid var(--honey); outline-offset: 3px; border-radius: 6px; }
::selection { background: rgba(255, 193, 77, 0.32); color: #fff8ea; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: 16px; top: -60px; z-index: 70; background: var(--honey); color: var(--honey-ink); padding: 10px 16px; border-radius: 999px; font-weight: 600; }
.skip:focus { top: 12px; }

.wrap { width: 100%; max-width: var(--max); margin-inline: auto; padding-inline: var(--gutter); }
.wrap-narrow { max-width: calc(var(--narrow) + 2 * var(--gutter)); }
.section { padding-block: clamp(88px, 12vw, 160px); position: relative; }
.section-tight { padding-block: clamp(64px, 8vw, 104px); }

/* Type */
.display { font-size: clamp(52px, 8.4vw, 116px); line-height: 0.98; letter-spacing: -0.045em; font-weight: 720; }
.h2 { font-size: clamp(34px, 4.8vw, 62px); line-height: 1.04; letter-spacing: -0.034em; }
.h3 { font-size: clamp(21px, 1.9vw, 26px); line-height: 1.22; letter-spacing: -0.018em; font-weight: 650; }
.lede { font-size: clamp(18px, 1.6vw, 21px); line-height: 1.55; color: var(--text-2); max-width: 60ch; }
.muted { color: var(--text-2); }
.faint { color: var(--text-3); }
.small { font-size: 14px; line-height: 1.55; }
.honey { color: var(--honey); }
.eyebrow { display: inline-flex; align-items: center; gap: 10px; font-size: 13px; font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase; color: var(--honey); margin-bottom: 20px; }
:lang(zh) .display, :lang(zh) .h2, :lang(zh) .h3 { letter-spacing: 0; line-height: 1.16; }
:lang(zh) .display { font-size: clamp(46px, 7.2vw, 100px); line-height: 1.08; }
/* Chinese headlines break at punctuation and spaces, not inside a word; overflow-wrap still saves narrow screens. */
:lang(zh) :is(.display, .h2, .h3, .mf-line, .statement, .phero h1) { word-break: keep-all; overflow-wrap: anywhere; }
:lang(zh) .eyebrow { letter-spacing: 0.08em; }
.stack-sm > * + * { margin-top: 12px; }
.stack > * + * { margin-top: 20px; }
.stack-lg > * + * { margin-top: 32px; }
.center { text-align: center; }
.center .lede { margin-inline: auto; }

/* Icons (Phosphor, inlined at build time) */
.i { width: 1.15em; height: 1.15em; flex: none; fill: currentColor; }
.i-lg { width: 28px; height: 28px; }

/* Buttons: one pill system */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  height: 50px; padding: 0 24px; border-radius: 999px; white-space: nowrap;
  font-size: 16px; font-weight: 620; letter-spacing: -0.01em;
  transition: transform 0.25s var(--ease), background-color 0.25s var(--ease), border-color 0.25s var(--ease), color 0.25s var(--ease);
}
.btn:active { transform: scale(0.98); }
.btn-primary { background: var(--honey); color: var(--honey-ink); }
.btn-primary:hover { background: var(--honey-2); }
.btn-ghost { background: rgba(255, 240, 215, 0.05); color: var(--text); box-shadow: inset 0 0 0 1px var(--line-strong); }
.btn-ghost:hover { background: rgba(255, 240, 215, 0.1); }
.btn-sm { height: 36px; padding: 0 16px; font-size: 14px; }
.btn .meta { font-weight: 500; opacity: 0.62; font-variant-numeric: tabular-nums; }
.btns { display: flex; flex-wrap: wrap; gap: 12px; }
.link { display: inline-flex; align-items: center; gap: 6px; color: var(--honey); font-weight: 600; }
.link .i { transition: transform 0.25s var(--ease); }
.link:hover .i { transform: translateX(3px); }

/* Navigation */
.nav { position: fixed; inset: 0 0 auto 0; z-index: 50; height: var(--nav-h); transition: background-color 0.3s var(--ease), box-shadow 0.3s var(--ease); }
.nav.solid, .nav.open { background: rgba(10, 8, 12, 0.74); -webkit-backdrop-filter: blur(18px) saturate(1.4); backdrop-filter: blur(18px) saturate(1.4); box-shadow: 0 1px 0 var(--line); }
.nav-in { height: 100%; display: flex; align-items: center; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 680; letter-spacing: -0.02em; font-size: 17px; }
.brand img { width: 30px; height: 30px; }
.nav-links { display: flex; gap: 26px; margin-left: 12px; font-size: 15px; color: var(--text-2); }
.nav-links a { transition: color 0.2s; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--text); }
.nav-end { margin-left: auto; display: flex; align-items: center; gap: 14px; }
.langs { display: inline-flex; align-items: center; gap: 2px; height: 36px; padding: 3px; border-radius: 999px; font-size: 13px; box-shadow: inset 0 0 0 1px var(--line); }
.langs .i { width: 15px; height: 15px; margin: 0 3px 0 7px; color: var(--text-3); }
.langs a, .langs span { height: 30px; display: inline-flex; align-items: center; padding: 0 11px; border-radius: 999px; }
.langs a { color: var(--text-2); transition: color 0.2s, background-color 0.2s; }
.langs a:hover { color: var(--text); background: rgba(255, 240, 215, 0.07); }
.langs .on { color: var(--text); font-weight: 620; background: rgba(255, 240, 215, 0.13); }
.menu-btn { display: none; width: 40px; height: 40px; border-radius: 999px; align-items: center; justify-content: center; box-shadow: inset 0 0 0 1px var(--line-strong); }
.menu-btn .i { width: 20px; height: 20px; }
.menu-btn .close { display: none; }
.nav.open .menu-btn .open-i { display: none; }
.nav.open .menu-btn .close { display: block; }
.menu { display: none; }
@media (max-width: 900px) {
  .nav-links, .nav-end .btn { display: none; }
  .menu-btn { display: inline-flex; }
  .menu { position: fixed; inset: var(--nav-h) 0 auto 0; z-index: 60; background: rgba(10, 8, 12, 0.96); -webkit-backdrop-filter: blur(18px); backdrop-filter: blur(18px); border-bottom: 1px solid var(--line); padding: 8px var(--gutter) 28px; }
  .nav.open + .menu { display: block; }
  .menu a:not(.btn) { display: block; padding: 14px 0; font-size: 20px; font-weight: 600; border-bottom: 1px solid var(--line); }
  .menu .btn { margin-top: 20px; width: 100%; }
}

/* Hero */
.hero { position: relative; min-height: 100dvh; display: flex; align-items: center; overflow: hidden; isolation: isolate; }
.sky { position: absolute; inset: 0; z-index: -1; }
.sky canvas { width: 100%; height: 100%; }
.sky::after { content: ""; position: absolute; inset: auto 0 0 0; height: 30%; background: linear-gradient(to bottom, transparent, var(--bg)); pointer-events: none; }
.hero-in { padding-top: calc(var(--nav-h) + 40px); padding-bottom: 72px; width: 100%; }
.hero-copy { max-width: 600px; }
.hero-brand { display: inline-flex; align-items: center; gap: 12px; color: var(--text-2); font-size: 15px; font-weight: 560; margin-bottom: 28px; }
.hero-brand img { width: 40px; height: 40px; }
.hero .lede { margin-top: 28px; max-width: 30em; }
.hero .btns { margin-top: 40px; }
@media (max-width: 820px) {
  .hero { align-items: flex-end; }
  .hero-in { padding-top: 46vh; padding-bottom: 56px; }
}

/* Product reveal */
.window { position: relative; border-radius: 0.8% / 1.28%; overflow: hidden; background: #1a1610; box-shadow: 0 0 0 1px var(--line-strong), 0 50px 140px -40px rgba(255, 168, 50, 0.22), 0 30px 80px -30px rgba(0, 0, 0, 0.8); }
.window img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; }
.reveal-head { max-width: 760px; margin-bottom: clamp(40px, 6vw, 72px); }
.reveal-head .lede { margin-top: 20px; }

/* Scroll-linked motion where the browser supports it; an IntersectionObserver fallback adds .in elsewhere */
.js .rv { opacity: 0; transform: translateY(28px); transition: opacity 1s var(--ease), transform 1s var(--ease); }
.js .rv.in { opacity: 1; transform: none; }
.js .rv-d1 { transition-delay: 0.08s; } .js .rv-d2 { transition-delay: 0.16s; } .js .rv-d3 { transition-delay: 0.24s; }
@supports (animation-timeline: view()) {
  @media (prefers-reduced-motion: no-preference) {
    .rise { animation: rise linear both; animation-timeline: view(); animation-range: entry 0% cover 42%; }
    @keyframes rise { from { transform: translateY(80px) scale(0.9); opacity: 0.35; } to { transform: none; opacity: 1; } }
  }
}

/* Film */
.film-grid { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 28px; align-items: start; margin-top: clamp(40px, 5vw, 64px); }
.player { position: relative; border-radius: var(--radius); overflow: hidden; background: #000; box-shadow: 0 0 0 1px var(--line-strong), 0 40px 120px -40px rgba(255, 168, 50, 0.2); aspect-ratio: 16 / 9; }
.player video { width: 100%; height: 100%; object-fit: cover; background: #000; }
.player-cover { position: absolute; inset: 0; display: grid; place-items: end start; padding: clamp(16px, 2.6vw, 32px); background: center / cover no-repeat; transition: opacity 0.4s var(--ease); }
.player-cover::before { content: ""; position: absolute; inset: 0; background: linear-gradient(to top, rgba(8, 7, 11, 0.55), rgba(8, 7, 11, 0) 40%); }
.player.playing .player-cover { opacity: 0; pointer-events: none; }
.play { position: relative; display: inline-flex; align-items: center; gap: 14px; height: 64px; padding: 0 28px 0 12px; border-radius: 999px; background: rgba(20, 16, 22, 0.66); -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px); box-shadow: inset 0 0 0 1px rgba(255, 232, 196, 0.22); font-weight: 620; font-size: 17px; transition: transform 0.3s var(--ease), background-color 0.3s; }
.play:hover { transform: scale(1.04); background: rgba(30, 24, 30, 0.8); }
.play-dot { width: 44px; height: 44px; border-radius: 999px; background: var(--honey); color: var(--honey-ink); display: grid; place-items: center; }
.play-dot .i { width: 20px; height: 20px; margin-left: 2px; }
@media (max-width: 600px) { .play { height: 46px; padding: 0 18px 0 7px; gap: 10px; font-size: 15px; } .play-dot { width: 32px; height: 32px; } .play-dot .i { width: 15px; height: 15px; } }
.chapters { list-style: none; margin: 0; padding: 0; border-left: 1px solid var(--line); }
.chapters button { display: grid; grid-template-columns: 52px 1fr; gap: 4px; width: 100%; text-align: left; padding: 11px 0 11px 20px; margin-left: -1px; border-left: 2px solid transparent; color: var(--text-2); font-size: 15px; line-height: 1.35; transition: color 0.2s, border-color 0.2s; }
.chapters button:hover { color: var(--text); }
.chapters button[aria-current="true"] { color: var(--text); border-left-color: var(--honey); }
.chapters time { font: 13px/1.6 var(--mono); color: var(--text-3); font-variant-numeric: tabular-nums; }
.film-note { margin-top: 16px; }
@media (max-width: 980px) {
  .film-grid { grid-template-columns: 1fr; }
  .chapters { display: flex; gap: 8px; overflow-x: auto; border: 0; padding-bottom: 6px; scrollbar-width: none; }
  .chapters::-webkit-scrollbar { display: none; }
  .chapters li { flex: none; }
  .chapters button { display: flex; gap: 8px; padding: 0 14px; height: 36px; align-items: center; margin: 0; border: 0; border-radius: 999px; box-shadow: inset 0 0 0 1px var(--line); white-space: nowrap; font-size: 14px; }
  .chapters button[aria-current="true"] { box-shadow: inset 0 0 0 1px var(--honey); }
  .chapters time { font-size: 12px; }
}

/* Manifesto */
.manifesto { max-width: 1060px; }
.mf-line { font-size: clamp(30px, 4.6vw, 64px); line-height: 1.12; letter-spacing: -0.03em; font-weight: 660; color: var(--text); }
.mf-line + .mf-line { margin-top: 0.42em; }
.mf-line.last { color: var(--honey); }
:lang(zh) .mf-line { letter-spacing: 0; line-height: 1.3; }
.js .mf-line { opacity: 0.2; transition: opacity 0.8s var(--ease); }
.js .mf-line.in { opacity: 1; }
@supports (animation-timeline: view()) {
  @media (prefers-reduced-motion: no-preference) {
    .js .mf-line { transition: none; animation: lit linear both; animation-timeline: view(); animation-range: cover 18% cover 42%; }
    @keyframes lit { from { opacity: 0.18; } to { opacity: 1; } }
  }
}
.before-after { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: clamp(64px, 8vw, 104px); }
.before-after figure { margin: 0; }
.before-after img { border-radius: var(--radius); aspect-ratio: 16 / 10; object-fit: cover; width: 100%; box-shadow: 0 0 0 1px var(--line); }
.before-after figcaption { margin-top: 14px; font-size: 15px; color: var(--text-2); }
.before-after figcaption strong { color: var(--text); font-weight: 620; }
@media (max-width: 720px) { .before-after { grid-template-columns: 1fr; } }

/* Bento */
.bento { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 16px; margin-top: clamp(40px, 5vw, 64px); }
.cell { position: relative; display: flex; flex-direction: column; background: var(--bg-card); border-radius: var(--radius); box-shadow: inset 0 0 0 1px var(--line); overflow: hidden; }
.cell-a { grid-column: span 4; } .cell-b { grid-column: span 2; } .cell-c { grid-column: span 2; } .cell-d { grid-column: span 4; }
.cell-body { padding: 30px 32px 0; }
.cell-body .h3 { margin-bottom: 10px; }
.cell-body p { color: var(--text-2); font-size: 16px; }
.cell-body .faint { margin-top: 10px; }
.cell-art { margin-top: auto; padding-top: 24px; }
.cell-art img { width: 100%; object-fit: cover; }
.cell-a .cell-art img, .cell-d .cell-art img { aspect-ratio: 2.1 / 1; }
.cell-b .cell-art img, .cell-c .cell-art img { aspect-ratio: 1.15 / 1; }
.num { display: inline-grid; place-items: center; width: 26px; height: 26px; border-radius: 999px; background: rgba(255, 193, 77, 0.14); color: var(--honey); font: 600 13px/1 var(--mono); margin-bottom: 18px; }
@media (max-width: 900px) { .bento { grid-template-columns: 1fr; } .cell-a, .cell-b, .cell-c, .cell-d { grid-column: auto; } .cell-b .cell-art img, .cell-c .cell-art img { aspect-ratio: 1.6 / 1; } .cell-body { padding: 26px 24px 0; } }

/* Sticky steps */
.steps { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr); gap: clamp(40px, 6vw, 88px); margin-top: clamp(24px, 4vw, 48px); }
.steps-media { position: sticky; top: calc(var(--nav-h) + 8vh); align-self: start; }
.steps-media .window { aspect-ratio: 16 / 10; }
.steps-media .window img { position: absolute; inset: 0; height: 100%; opacity: 0; transition: opacity 0.6s var(--ease), transform 0.8s var(--ease); transform: scale(1.02); }
.steps-media .window img.on { opacity: 1; transform: none; }
.step { min-height: 76vh; display: flex; flex-direction: column; justify-content: center; transition: opacity 0.5s var(--ease); }
.js .step { opacity: 0.32; }
.js .step.on { opacity: 1; }
.step .h3 { margin-bottom: 14px; }
.step p { color: var(--text-2); }
.step-img { display: none; }
@media (max-width: 900px) {
  .steps { grid-template-columns: 1fr; }
  .steps-media { display: none; }
  .step { min-height: 0; padding-block: 28px; }
  .js .step { opacity: 1; }
  .step-img { display: block; margin-bottom: 24px; }
}

/* Tabs */
.tabs-list { display: flex; justify-content: center; flex-wrap: wrap; gap: 8px; margin-top: 40px; }
.tab { height: 42px; padding: 0 18px; border-radius: 999px; font-size: 15px; font-weight: 560; color: var(--text-2); box-shadow: inset 0 0 0 1px var(--line); transition: color 0.2s, background-color 0.2s, box-shadow 0.2s; white-space: nowrap; }
.tab:hover { color: var(--text); }
.tab[aria-selected="true"] { color: var(--text); background: rgba(255, 193, 77, 0.1); box-shadow: inset 0 0 0 1px rgba(255, 193, 77, 0.5); }
.panel { margin-top: 40px; }
.panel[hidden] { display: none; }
.panel .window, .panel .art { max-width: 1080px; margin-inline: auto; }
.panel .art { border-radius: var(--radius); overflow: hidden; box-shadow: 0 0 0 1px var(--line-strong); }
.panel .art img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; }
.panel-text { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 40px; max-width: 1080px; margin: 36px auto 0; }
.panel-text p { color: var(--text-2); }
.panel-text .h3 { margin-bottom: 12px; }
.note { font-size: 15px; line-height: 1.6; color: var(--text-2); border-left: 2px solid rgba(255, 193, 77, 0.55); padding: 2px 0 2px 18px; }
.note strong { color: var(--text); font-weight: 620; }
@media (max-width: 800px) { .tabs-list { flex-wrap: nowrap; justify-content: flex-start; overflow-x: auto; scrollbar-width: none; margin-inline: calc(-1 * var(--gutter)); padding-inline: var(--gutter); } .tabs-list::-webkit-scrollbar { display: none; } .panel-text { grid-template-columns: 1fr; gap: 24px; } }

/* Devices collage */
.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr); gap: clamp(40px, 6vw, 96px); align-items: center; }
.ticks { list-style: none; padding: 0; margin: 32px 0 0; display: grid; gap: 16px; }
.ticks li { display: grid; grid-template-columns: 24px 1fr; gap: 12px; color: var(--text-2); }
.ticks .i { color: var(--honey); margin-top: 4px; }
.collage { position: relative; padding-bottom: 22%; }
.collage .back { border-radius: var(--radius); overflow: hidden; box-shadow: 0 0 0 1px var(--line); }
.collage .back img { width: 100%; aspect-ratio: 1.55 / 1; object-fit: cover; }
.collage .front { position: absolute; right: -4%; bottom: 0; width: 72%; }
@media (max-width: 900px) { .split { grid-template-columns: 1fr; } .collage .front { right: 0; } }

/* Privacy statement */
.statement { font-size: clamp(42px, 7vw, 96px); line-height: 1; letter-spacing: -0.045em; font-weight: 720; }
:lang(zh) .statement { letter-spacing: 0; line-height: 1.12; }
.statement span { display: block; }
.facts { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 40px 32px; margin-top: clamp(56px, 7vw, 88px); text-align: left; }
.fact .i { width: 30px; height: 30px; color: var(--honey); margin-bottom: 18px; }
.fact h3 { font-size: 18px; font-weight: 640; margin-bottom: 8px; letter-spacing: -0.01em; }
.fact p { font-size: 15px; color: var(--text-2); }
@media (max-width: 980px) { .facts { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .facts { grid-template-columns: 1fr; } }

/* Marquee */
.marquee { overflow: hidden; margin-top: 48px; -webkit-mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent); mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent); }
.marquee-track { display: flex; width: max-content; }
.marquee-group { display: flex; align-items: center; gap: 40px; padding-right: 40px; }
.marquee-group span { font-size: clamp(24px, 3vw, 38px); font-weight: 640; letter-spacing: -0.02em; color: var(--text-3); white-space: nowrap; }
.marquee-group .i { width: 16px; height: 16px; color: rgba(255, 193, 77, 0.6); }
@media (prefers-reduced-motion: no-preference) {
  .marquee-track { animation: slide 46s linear infinite; }
  .marquee:hover .marquee-track { animation-play-state: paused; }
  @keyframes slide { to { transform: translateX(-50%); } }
}
@media (prefers-reduced-motion: reduce) { .marquee-track { width: auto; flex-wrap: wrap; justify-content: center; } .marquee-group[aria-hidden] { display: none; } .marquee-group { flex-wrap: wrap; justify-content: center; row-gap: 12px; } .marquee { -webkit-mask-image: none; mask-image: none; } }

/* Get it */
.get { position: relative; text-align: center; border-radius: 28px; padding: clamp(48px, 7vw, 88px) var(--gutter); background: radial-gradient(120% 90% at 50% 0%, rgba(255, 178, 64, 0.12), transparent 60%), var(--bg-raise); box-shadow: inset 0 0 0 1px var(--line); }
.get-icon { width: 128px; height: 128px; margin: 0 auto 28px; filter: drop-shadow(0 20px 50px rgba(255, 170, 50, 0.35)); }
.price { font-size: clamp(40px, 5vw, 56px); font-weight: 720; letter-spacing: -0.03em; margin-top: 18px; }
.price-note { color: var(--text-2); margin-top: 6px; }
.get .btns { justify-content: center; margin-top: 32px; }
.specs { display: grid; grid-template-columns: 1fr 1fr; gap: 0 48px; max-width: 900px; margin: clamp(48px, 6vw, 72px) auto 0; text-align: left; }
.spec { display: grid; grid-template-columns: 120px 1fr; gap: 16px; padding: 18px 0; border-top: 1px solid var(--line); font-size: 15px; }
.spec dt { color: var(--text); font-weight: 620; }
.spec dd { margin: 0; color: var(--text-2); }
@media (max-width: 760px) { .specs { grid-template-columns: 1fr; } .spec { grid-template-columns: 1fr; gap: 4px; } }

/* FAQ */
.faq { max-width: 880px; margin: clamp(32px, 4vw, 48px) auto 0; }
.qa { border-bottom: 1px solid var(--line); }
.qa summary { list-style: none; display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 24px 0; cursor: pointer; font-size: clamp(17px, 1.5vw, 19px); font-weight: 620; letter-spacing: -0.01em; }
.qa summary::-webkit-details-marker { display: none; }
.qa summary .i { color: var(--text-3); transition: transform 0.3s var(--ease), color 0.2s; width: 20px; height: 20px; }
.qa[open] summary .i { transform: rotate(45deg); color: var(--honey); }
.qa .answer { padding: 0 48px 26px 0; color: var(--text-2); }
.qa .answer > * + * { margin-top: 12px; }
.qa .answer a { color: var(--honey); }
.faq-more { text-align: center; margin-top: 40px; }

/* Closing band */
.closing { position: relative; text-align: center; overflow: hidden; padding-block: clamp(120px, 16vw, 220px); isolation: isolate; }
.closing-bg { position: absolute; inset: 0; z-index: -1; background: center / cover no-repeat; opacity: 0.55; }
.closing-bg::after { content: ""; position: absolute; inset: 0; background: radial-gradient(60% 70% at 50% 50%, rgba(8, 7, 11, 0.2), var(--bg) 92%); }
.closing .btns { justify-content: center; margin-top: 36px; }

/* Sub-page hero */
.phero { position: relative; overflow: hidden; isolation: isolate; padding: calc(var(--nav-h) + clamp(72px, 10vw, 128px)) 0 clamp(56px, 7vw, 88px); }
.phero .sky::after { height: 50%; }
.phero h1 { font-size: clamp(44px, 6.6vw, 88px); line-height: 1.02; letter-spacing: -0.04em; font-weight: 720; max-width: 15ch; }
:lang(zh) .phero h1 { letter-spacing: 0; line-height: 1.14; max-width: 16em; }
.phero .lede { margin-top: 24px; }

/* Chapter bar (features, FAQ) */
.chapbar { position: sticky; top: var(--nav-h); z-index: 40; background: rgba(8, 7, 11, 0.82); -webkit-backdrop-filter: blur(16px); backdrop-filter: blur(16px); border-block: 1px solid var(--line); }
.chapbar .wrap { display: flex; gap: 6px; overflow-x: auto; scrollbar-width: none; padding-block: 10px; }
.chapbar .wrap::-webkit-scrollbar { display: none; }
.chapbar a { flex: none; height: 34px; display: inline-flex; align-items: center; padding: 0 14px; border-radius: 999px; font-size: 14px; color: var(--text-2); white-space: nowrap; transition: color 0.2s, background-color 0.2s; }
.chapbar a:hover { color: var(--text); }
.chapbar a.on { color: var(--text); background: rgba(255, 193, 77, 0.12); }

/* Feature chapters */
.chapter { padding-block: clamp(80px, 10vw, 128px); border-top: 1px solid var(--line); }
.chapter:first-of-type { border-top: 0; }
.chapter-head { max-width: 780px; }
.chapter-head .lede { margin-top: 18px; }
.chapter-fig { margin: clamp(40px, 5vw, 56px) 0 0; }
.chapter-fig figcaption { margin-top: 14px; font-size: 14px; color: var(--text-3); }
.chapter-fig .art { border-radius: var(--radius); overflow: hidden; box-shadow: 0 0 0 1px var(--line); }
.chapter-fig .art img { width: 100%; aspect-ratio: 2 / 1; object-fit: cover; }
.chapter.side .chapter-body { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.3fr); gap: clamp(32px, 5vw, 72px); align-items: start; margin-top: clamp(40px, 5vw, 56px); }
.chapter.side .chapter-fig { margin: 0; position: sticky; top: calc(var(--nav-h) + 80px); }
.flist { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 36px 40px; margin-top: clamp(40px, 5vw, 56px); }
.chapter.side .flist { grid-template-columns: 1fr; margin-top: 0; gap: 30px; }
.fitem { display: grid; grid-template-columns: 36px 1fr; gap: 14px; }
.fitem .i { width: 24px; height: 24px; color: var(--honey); margin-top: 2px; }
.fitem h3 { font-size: 18px; font-weight: 640; letter-spacing: -0.01em; margin-bottom: 6px; }
.fitem p { font-size: 16px; color: var(--text-2); }
.chapter .note { margin-top: 40px; max-width: 760px; }
@media (max-width: 900px) { .chapter.side .chapter-body { grid-template-columns: 1fr; } .chapter.side .chapter-fig { position: static; } .flist { grid-template-columns: 1fr; } }

/* Long-form pages (privacy, press) */
.prose { max-width: 760px; }
.prose h2 { font-size: clamp(28px, 3.2vw, 40px); line-height: 1.12; letter-spacing: -0.03em; margin: 72px 0 18px; }
:lang(zh) .prose h2 { letter-spacing: 0; }
.prose h2:first-child { margin-top: 0; }
.prose h3 { font-size: 19px; margin: 32px 0 10px; letter-spacing: -0.01em; }
.prose p, .prose li { color: var(--text-2); }
.prose p + p { margin-top: 16px; }
.prose ul { padding-left: 1.2em; margin: 14px 0 0; }
.prose li + li { margin-top: 10px; }
.prose li::marker { color: var(--honey); }
.prose a { color: var(--honey); text-decoration: underline; text-decoration-color: rgba(255, 193, 77, 0.4); text-underline-offset: 3px; }
.prose strong { color: var(--text); font-weight: 620; }

.flow { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr; align-items: stretch; gap: 14px; margin: clamp(40px, 5vw, 56px) 0; }
.flow-box { border-radius: var(--radius); padding: 24px; background: var(--bg-card); box-shadow: inset 0 0 0 1px var(--line); }
.flow-box.gate { box-shadow: inset 0 0 0 1px rgba(255, 193, 77, 0.55); background: radial-gradient(100% 100% at 50% 0%, rgba(255, 193, 77, 0.1), transparent 70%), var(--bg-card); }
.flow-box .i { width: 28px; height: 28px; color: var(--honey); margin-bottom: 14px; }
.flow-box h3 { font-size: 18px; margin-bottom: 8px; }
.flow-box p { font-size: 15px; color: var(--text-2); }
.flow-arrow { display: grid; place-items: center; color: var(--text-3); }
.flow-arrow .i { width: 22px; height: 22px; }
@media (max-width: 860px) { .flow { grid-template-columns: 1fr; } .flow-arrow { transform: rotate(90deg); padding-block: 2px; } }

.shorts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin-top: 8px; }
.short { padding: 28px; border-radius: var(--radius); background: var(--bg-card); box-shadow: inset 0 0 0 1px var(--line); }
.short .i { width: 26px; height: 26px; color: var(--honey); margin-bottom: 16px; }
.short h3 { font-size: 19px; margin-bottom: 8px; }
.short p { color: var(--text-2); font-size: 16px; }
@media (max-width: 720px) { .shorts { grid-template-columns: 1fr; } }

/* Press kit */
.downloads { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin-top: 32px; }
.dl { display: flex; flex-direction: column; border-radius: var(--radius); overflow: hidden; background: var(--bg-card); box-shadow: inset 0 0 0 1px var(--line); transition: box-shadow 0.25s var(--ease), transform 0.25s var(--ease); }
.dl:hover { box-shadow: inset 0 0 0 1px rgba(255, 193, 77, 0.5); transform: translateY(-2px); }
.dl-thumb { aspect-ratio: 16 / 10; background: #0c0a0e center / cover no-repeat; display: grid; place-items: center; }
.dl-thumb img { width: 46%; }
.dl-body { padding: 20px 22px 22px; display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; }
.dl-body h3 { font-size: 17px; margin-bottom: 4px; }
.dl-body p { font-size: 14px; color: var(--text-3); }
.dl-body .i { color: var(--honey); width: 22px; height: 22px; margin-top: 2px; }
@media (max-width: 900px) { .downloads { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .downloads { grid-template-columns: 1fr; } }
.copybox { position: relative; border-radius: var(--radius); padding: 26px 28px; background: var(--bg-card); box-shadow: inset 0 0 0 1px var(--line); margin-top: 18px; }
.copybox p { color: var(--text-2); padding-right: 92px; }
.copybox .btn { position: absolute; top: 18px; right: 18px; }
@media (max-width: 560px) { .copybox p { padding-right: 0; padding-bottom: 52px; } .copybox .btn { top: auto; bottom: 18px; } }
.factsheet { display: grid; grid-template-columns: 1fr 1fr; gap: 0 48px; margin-top: 24px; }
.swatches { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; margin-top: 24px; }
.swatch { border-radius: var(--radius-sm); overflow: hidden; box-shadow: inset 0 0 0 1px var(--line); }
.swatch i { display: block; height: 84px; }
.swatch div { padding: 12px 14px; font-size: 14px; }
.swatch code { font: 13px var(--mono); color: var(--text-3); }
@media (max-width: 760px) { .factsheet { grid-template-columns: 1fr; } .swatches { grid-template-columns: 1fr 1fr; } }

/* Footer */
.footer { border-top: 1px solid var(--line); padding: 64px 0 40px; font-size: 14px; color: var(--text-2); }
.footer-top { display: grid; grid-template-columns: 1.4fr repeat(3, minmax(0, 1fr)); gap: 40px; }
.footer h3 { font-size: 13px; font-weight: 620; color: var(--text); margin-bottom: 14px; }
.footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.footer a:hover { color: var(--text); }
.footer .brand { margin-bottom: 14px; }
.footer-legal { margin-top: 56px; padding-top: 24px; border-top: 1px solid var(--line); display: grid; gap: 10px; color: var(--text-3); font-size: 13px; line-height: 1.6; }
@media (max-width: 860px) { .footer-top { grid-template-columns: 1fr 1fr; } .footer-top > :first-child { grid-column: 1 / -1; } }

/* 404 */
.lost { min-height: 100dvh; display: flex; align-items: center; position: relative; overflow: hidden; isolation: isolate; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
  .js .rv { opacity: 1; transform: none; }
  .js .mf-line { opacity: 1; }
}