:root {
  --c-bg: #FFFFFF;
  --c-panel: #F4F4F3;
  --c-panel-2: #ECECEA;
  --c-border: #E3E3E1;
  --c-accent: #93F25A;
  --c-accent-hi: #B4F78A;
  --c-accent-dark: #2F7D12;
  --c-text: #121312;
  --c-muted: #5E625F;
  --c-success: #2E9E4F;
  --c-warn: #C98A0B;
  --c-error: #D2392B;
  --ink-950: #0C0D0D;
  --ink-panel-a: #161717;
  --ink-panel-b: #101111;
  --ink-ring: #1D1F1E;
  --ink-window: #1A1C1B;
  --ink-window-line: #2B2D2C;
  --ink-menu: #232524;
  --ink-menu-line: #3A3D3B;
  --ink-menu-on: #2E312F;
  --ink-slab-0: #050606;
  --ink-slab-1: #0E0F0F;
  --ink-chip-line: #2F3130;
  --ink-hover: #1B1C1C;
  --on-dark: #FFFFFF;
  --on-dark-2: #C9CCCA;
  --on-dark-muted: #8E928F;
  --on-dark-faint: #6A6E6C;
  --line-on-accent: rgba(18, 19, 18, .16);
  --veil-color: rgba(5, 6, 6, .72);
  --c-clear: transparent;
  --font-display: "Inter", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Inter", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --fs-xs: 12px;
  --fs-meta: 12.5px;
  --fs-menu: 13.5px;
  --fs-sm: 14px;
  --fs-nav: 15px;
  --fs-button: 16px;
  --fs-body: 17px;
  --fs-brand: 18px;
  --fs-lead: 20px;
  --fs-h3: 24px;
  --fs-h2: clamp(26px, 2.6vw, 36px);
  --fs-h1: clamp(34px, 3.4vw, 48px);
  --fs-device-label: 11px;
  --fw-normal: 400;
  --fw-medium: 500;
  --fw-semibold: 600;
  --fw-bold: 700;
  --fw-brand: 800;
  --fw-display: 900;
  --lh-body: 1.6;
  --lh-prose: 1.85;
  --lh-title: 1.1;
  --ls-display: -.035em;
  --ls-cjk: -.02em;
  --ls-button: -.005em;
  --ls-mono: .01em;
  --ls-label: .04em;
  --r-cut: 32px;
  --r-panel: 32px;
  --r-section: 36px;
  --r-window: 28px;
  --r-card: 24px;
  --r-menu: 20px;
  --r-item: 10px;
  --r-btn: 12px;
  --r-focus: 6px;
  --r-small: 3px;
  --r-pill: 999px;
  --r-round: 50%;
  --gutter: 64px;
  --head-h: 76px;
  --reading-width: 840px;
  --content-width: 1152px;
  --header-width: 1280px;
  --section-space: 112px;
  --dev-scale: 1;
  --dev-tilt: -2deg;
  --sub-tilt: 4deg;
  --ease: cubic-bezier(.2, .65, .3, 1);
  --time-fast: .18s;
  --time-reveal: .6s;
  --focus-ring: 2px solid var(--c-accent-dark);
  --paper-window: 12px 12px 0 0 var(--ink-slab-0);
  --paper-menu: 10px 10px 0 0 var(--ink-slab-1);
  --paper-accent: 10px 10px 0 0 var(--c-accent-dark);
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 24px; }
html.nav-open { overflow: hidden; }
body {
  margin: 0;
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
button, a { -webkit-tap-highlight-color: var(--c-clear); }
button { color: inherit; }
img, svg { vertical-align: middle; }
img { max-width: 100%; height: auto; }
svg { flex-shrink: 0; }
p, ul, ol, dl, blockquote, figure { margin: 0; }
h1, h2, h3, h4 { margin: 0; font-family: var(--font-display); text-wrap: balance; }
h1 { font-size: var(--fs-h1); font-weight: var(--fw-display); line-height: var(--lh-title); letter-spacing: var(--ls-cjk); }
h2 { font-size: var(--fs-h2); font-weight: var(--fw-display); line-height: 1.2; letter-spacing: var(--ls-cjk); }
h3 { font-size: var(--fs-h3); font-weight: var(--fw-bold); line-height: 1.35; letter-spacing: var(--ls-cjk); }
:focus-visible { outline: var(--focus-ring); outline-offset: 3px; border-radius: var(--r-focus); }
[hidden] { display: none !important; }
code, pre { font-family: var(--font-mono); }
code { overflow-wrap: anywhere; }
pre {
  max-width: 100%;
  min-width: 0;
  overflow-x: auto;
  padding: 24px;
  border-radius: var(--r-card);
  background: var(--ink-window);
  color: var(--on-dark-2);
  font-size: var(--fs-sm);
  line-height: 1.8;
  tab-size: 2;
}
pre code { overflow-wrap: normal; word-break: normal; white-space: pre; }
.wrap {
  width: 100%;
  max-width: calc(var(--content-width) + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.reading { max-width: calc(var(--reading-width) + var(--gutter) * 2); }
.section { padding-top: var(--section-space); padding-bottom: var(--section-space); }
.section-heading { max-width: 24em; margin: 0 auto 56px; text-align: center; }
.section-heading p { margin-top: 18px; color: var(--c-muted); }
.section-white { background: var(--c-bg); color: var(--c-text); }
.accent-section {
  margin-inline: var(--gutter);
  padding: 80px 48px;
  border-radius: var(--r-section);
  background: var(--c-accent);
  color: var(--c-text);
}
.panel-card, .card {
  min-width: 0;
  padding: 32px;
  border: 1px solid var(--c-border);
  border-radius: var(--r-card);
  background: var(--c-bg);
  color: var(--c-text);
}
.panel-card { border-radius: var(--r-panel); background: var(--c-panel); color: var(--c-text); }
.card p + p, .panel-card p + p { margin-top: 16px; }
.card h3 + p { margin-top: 16px; }
.grid-pair { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.grid-pair > *, .wrap > *, .prose > *, .prose div { min-width: 0; }
.stack { display: grid; gap: 24px; }
.flow > * + * { margin-top: 24px; }
.muted { color: var(--c-muted); }
.mono { font-family: var(--font-mono); }
.keep { white-space: nowrap; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}
.prose { min-width: 0; line-height: var(--lh-prose); }
.prose p + p, .prose ul, .prose ol, .prose pre, .prose .callout { margin-top: 24px; }
.prose h2 { margin-top: 64px; margin-bottom: 24px; }
.prose h3 { margin-top: 36px; margin-bottom: 16px; }
.prose li + li { margin-top: 12px; }
.prose a { color: var(--c-accent-dark); text-decoration: underline; text-underline-offset: 4px; }
.prose :not(pre) > code { background: var(--c-panel); color: var(--c-text); border-radius: var(--r-small); padding: 2px 5px; font-size: .9em; }
.actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 54px;
  max-width: 100%;
  padding: 12px 26px;
  border: 1.5px solid var(--c-clear);
  border-radius: var(--r-btn);
  font-size: var(--fs-button);
  font-weight: var(--fw-bold);
  line-height: 1.4;
  letter-spacing: var(--ls-button);
  text-align: center;
  transition: background-color var(--time-fast) ease, border-color var(--time-fast) ease;
}
.btn svg { width: 18px; height: 18px; flex-shrink: 0; }
.btn-main { background: var(--c-accent); color: var(--c-text); }
.btn-main:hover, .btn-main.is-hover { background: var(--c-accent-hi); color: var(--c-text); }
.btn-main:active, .btn-main.is-pressed { background: var(--c-accent-dark); color: var(--on-dark); }
.btn-secondary { border-color: var(--c-text); background: var(--c-bg); color: var(--c-text); }
.btn-secondary:hover { background: var(--c-panel-2); color: var(--c-text); }
.btn-dark { background: var(--c-text); color: var(--on-dark); }
.btn-dark:hover { background: var(--ink-menu); color: var(--on-dark); }
.btn-ghost { border-color: var(--on-dark); background: var(--c-clear); color: var(--on-dark); font-weight: var(--fw-semibold); }
.btn-ghost:hover { background: var(--ink-hover); color: var(--on-dark); }
.btn:disabled, .btn[aria-disabled="true"] { background: var(--c-panel-2); color: var(--c-muted); border-color: var(--c-border); cursor: not-allowed; }
.btn.is-focus { outline: var(--focus-ring); outline-offset: 3px; }
.reveal { opacity: 1; transform: none; }
.reveal-pending .reveal:not(.shown) { opacity: 0; transform: translateY(18px); }
.reveal-pending .reveal { transition: opacity var(--time-reveal) var(--ease), transform var(--time-reveal) var(--ease); }
.reveal.shown { opacity: 1; transform: none; }

/* 独立的宽页头，不复用正文版心。 */
#site-header { position: relative; z-index: 30; background: var(--ink-950); color: var(--on-dark); }
.topnav {
  position: relative;
  z-index: 30;
  display: flex;
  align-items: center;
  gap: 40px;
  width: 100%;
  max-width: min(100%, calc(var(--header-width) + var(--gutter) * 2));
  min-height: var(--head-h);
  margin-inline: auto;
  padding-inline: var(--gutter);
  background: var(--ink-950);
  color: var(--on-dark);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  font-family: var(--font-display);
  font-weight: var(--fw-brand);
  font-size: var(--fs-brand);
  letter-spacing: var(--ls-cjk);
  color: var(--on-dark);
  white-space: nowrap;
}
.brand img { width: 32px; height: 32px; flex-shrink: 0; }
.desktop-nav { min-width: 0; margin-left: auto; }
.topnav-links {
  display: flex;
  align-items: center;
  gap: 34px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.topnav-links a {
  display: block;
  padding-block: 12px;
  font-size: var(--fs-nav);
  font-weight: var(--fw-medium);
  color: var(--on-dark-muted);
  white-space: nowrap;
  transition: color var(--time-fast) ease;
}
.topnav-links a:hover { color: var(--on-dark); }
.topnav-links a[aria-current="page"] { color: var(--on-dark); font-weight: var(--fw-bold); }
.header-tools { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.language-picker { position: relative; }
.lang {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-height: 38px;
  padding: 6px 16px;
  border: 1px solid var(--ink-chip-line);
  border-radius: var(--r-pill);
  background: var(--ink-950);
  color: var(--on-dark-2);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  white-space: nowrap;
}
.lang:hover { border-color: var(--on-dark-faint); color: var(--on-dark); }
.lang-arrow { font-size: var(--fs-device-label); color: var(--on-dark-muted); }
.lang-short { display: none; }
.language-list {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  z-index: 35;
  min-width: 180px;
  padding: 8px;
  border: 1px solid var(--ink-menu-line);
  border-radius: var(--r-menu);
  background: var(--ink-menu);
  color: var(--on-dark);
  list-style: none;
}
.language-list a { display: flex; align-items: center; min-height: 44px; padding: 10px 16px; border-radius: var(--r-item); }
.language-list a:hover, .language-list a[aria-current="true"] { background: var(--ink-menu-on); color: var(--c-accent); }
.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  padding: 8px;
  border: 1px solid var(--ink-chip-line);
  border-radius: var(--r-btn);
  background: var(--ink-950);
  color: var(--on-dark);
}
.menu-toggle svg { width: 22px; height: 22px; }
.mobile-drawer {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  z-index: 34;
  max-height: calc(100dvh - var(--head-h));
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 16px var(--gutter) 32px;
  background: var(--ink-950);
  color: var(--on-dark);
  border-top: 1px solid var(--ink-chip-line);
}
.mobile-drawer ul { list-style: none; margin: 0; padding: 0; }
.mobile-drawer a { display: flex; align-items: center; width: 100%; min-height: 48px; padding: 12px 8px; }
.mobile-drawer a[aria-current] { color: var(--c-accent); font-weight: var(--fw-bold); }
.drawer-languages { margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--ink-chip-line); }
.nav-veil { position: fixed; inset: var(--head-h) 0 0; z-index: 20; border: 0; background: var(--veil-color); color: var(--on-dark); }

/* 拍板首屏：分屏画布与静态桌面菜单。 */
.stage {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 47%;
  grid-template-rows: var(--head-h) 1fr;
  height: max(760px, calc(100vh - 16px));
  overflow-x: clip;
  background: var(--ink-950);
  color: var(--on-dark);
}
.stage > #site-header, .stage > .topnav { grid-column: 1 / -1; grid-row: 1; }
.copy {
  grid-column: 1;
  grid-row: 2;
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 0 56px 64px var(--gutter);
}
.copy-main { margin: auto 0; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 32px;
  max-width: 100%;
  padding: 4px 14px 4px 12px;
  border: 1px solid var(--ink-chip-line);
  border-radius: var(--r-pill);
  font-family: var(--font-mono);
  font-size: var(--fs-meta);
  letter-spacing: var(--ls-mono);
  color: var(--on-dark-2);
}
.eyebrow i { width: 8px; height: 8px; border-radius: var(--r-round); background: var(--c-accent); flex-shrink: 0; }
.eyebrow b { font-weight: var(--fw-normal); color: var(--on-dark-muted); }
.title {
  margin: 28px 0 0;
  font-size: clamp(30px, 3.4vw, 48px);
  line-height: var(--lh-title);
  letter-spacing: var(--ls-display);
  color: var(--on-dark);
}
.title-strong { display: block; font-weight: var(--fw-display); }
.title-light { display: block; font-weight: var(--fw-normal); color: var(--on-dark-2); letter-spacing: var(--ls-cjk); }
.lede { margin-top: 22px; max-width: 33em; font-size: var(--fs-body); line-height: 1.75; color: var(--on-dark-muted); }
.lede strong {
  font-weight: var(--fw-semibold);
  color: var(--on-dark);
  background-image: linear-gradient(var(--c-accent), var(--c-accent));
  background-size: 100% 2px;
  background-repeat: no-repeat;
  background-position: 0 100%;
  padding-bottom: 1px;
}
.platforms { display: flex; flex-wrap: wrap; gap: 10px; margin: 30px 0 0; padding: 0; list-style: none; }
.platforms a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 38px;
  padding: 6px 15px 6px 12px;
  border: 1px solid var(--ink-chip-line);
  border-radius: var(--r-pill);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--on-dark-2);
}
.platforms a:hover { border-color: var(--c-accent); color: var(--on-dark); }
.platforms svg { width: 16px; height: 16px; flex-shrink: 0; color: var(--on-dark); }
.facts {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  margin: 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--ink-window-line);
  font-family: var(--font-mono);
  font-size: var(--fs-meta);
  color: var(--on-dark-muted);
  list-style: none;
}
.facts li { display: inline-flex; align-items: center; gap: 9px; padding: 0 20px; border-left: 1px solid var(--ink-window-line); white-space: nowrap; }
.facts li:first-child { padding-left: 0; border-left: 0; }
.facts i { width: 6px; height: 6px; border-radius: var(--r-round); background: var(--c-success); flex-shrink: 0; }
.facts em { font-style: normal; color: var(--on-dark-2); }
.panel {
  grid-column: 2;
  grid-row: 2;
  position: relative;
  margin-top: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
  padding-bottom: 32px;
  border-radius: var(--r-panel) 0 0 0;
  background: linear-gradient(180deg, var(--ink-panel-a) 0%, var(--ink-panel-b) 100%);
  color: var(--on-dark);
  overflow: hidden;
}
.panel-rings { position: absolute; width: 980px; height: 980px; top: -300px; right: -330px; pointer-events: none; }
.panel-rings circle { fill: none; stroke: var(--ink-ring); stroke-width: 1; }
.device { position: relative; flex-shrink: 0; width: 600px; height: 550px; margin-top: -8px; transform: rotate(var(--dev-tilt)) scale(var(--dev-scale)); }
.desk {
  position: absolute;
  left: 0;
  top: 0;
  width: 500px;
  height: 462px;
  border-radius: var(--r-window);
  background: var(--ink-window);
  color: var(--on-dark-2);
  border: 1px solid var(--ink-window-line);
  box-shadow: var(--paper-window);
}
.desk-bar { position: relative; height: 40px; border-bottom: 1px solid var(--ink-window-line); }
.desk-act { position: absolute; left: 14px; top: 6px; display: inline-flex; align-items: center; height: 28px; padding: 0 12px; border-radius: var(--r-pill); font-size: var(--fs-meta); font-weight: var(--fw-semibold); color: var(--on-dark-2); }
.tray { position: absolute; right: 14px; top: 6px; display: flex; gap: 6px; }
.tray span { display: inline-flex; align-items: center; justify-content: center; width: 28px; height: 28px; border-radius: var(--r-pill); color: var(--on-dark-muted); }
.tray svg { width: 15px; height: 15px; }
.tray .tray-app { width: 40px; background: var(--ink-menu-on); color: var(--c-accent); }
.tray .tray-app svg { width: 17px; height: 17px; }
.menu {
  position: absolute;
  left: 96px;
  top: 50px;
  width: 316px;
  padding: 8px;
  border-radius: var(--r-menu);
  background: var(--ink-menu);
  color: var(--on-dark-2);
  border: 1px solid var(--ink-menu-line);
  box-shadow: var(--paper-menu);
}
.menu-caret { position: absolute; left: 262px; top: -7px; width: 12px; height: 12px; background: var(--ink-menu); color: var(--on-dark); border-top: 1px solid var(--ink-menu-line); border-left: 1px solid var(--ink-menu-line); border-radius: var(--r-small) 0 0 0; transform: rotate(45deg); }
.menu-label { height: 28px; display: flex; align-items: flex-end; padding: 0 12px 6px; font-family: var(--font-mono); font-size: var(--fs-device-label); letter-spacing: var(--ls-label); color: var(--on-dark-muted); }
.menu-item { display: flex; align-items: center; gap: 10px; height: 34px; padding: 0 12px; border-radius: var(--r-item); font-size: var(--fs-menu); color: var(--on-dark-2); }
.menu-tick { display: inline-flex; width: 16px; height: 16px; flex-shrink: 0; color: var(--c-accent); }
.menu-tick svg { width: 16px; height: 16px; }
.menu-item.is-on { background: var(--ink-menu-on); color: var(--on-dark); font-weight: var(--fw-semibold); }
.menu-rule { height: 1px; margin: 8px 4px; background: var(--ink-menu-line); color: var(--on-dark); }
.menu-tun { display: flex; align-items: center; gap: 12px; height: 40px; padding: 0 12px; font-size: var(--fs-menu); font-weight: var(--fw-semibold); color: var(--on-dark); }
.toggle { position: relative; width: 36px; height: 20px; flex-shrink: 0; border-radius: var(--r-pill); background: var(--c-accent); color: var(--c-text); }
.toggle::after { content: ""; position: absolute; top: 3px; right: 3px; width: 14px; height: 14px; border-radius: var(--r-round); background: var(--ink-950); color: var(--on-dark); }
.subs { position: absolute; left: 336px; top: 322px; width: 256px; padding: 18px 20px 10px; border-radius: var(--r-card); background: var(--c-accent); color: var(--c-text); box-shadow: var(--paper-accent); transform: rotate(var(--sub-tilt)); }
.subs-head { display: flex; align-items: center; justify-content: space-between; padding-bottom: 12px; border-bottom: 1px solid var(--line-on-accent); font-family: var(--font-display); font-size: var(--fs-body); font-weight: var(--fw-display); letter-spacing: var(--ls-cjk); }
.subs-head svg { width: 16px; height: 16px; }
.subs-row { display: flex; align-items: center; gap: 10px; min-height: 42px; font-size: var(--fs-menu); font-weight: var(--fw-semibold); border-bottom: 1px solid var(--line-on-accent); }
.subs-row:last-child { border-bottom: 0; }
.subs-row svg { width: 15px; height: 15px; flex-shrink: 0; }
.after { position: relative; z-index: 2; margin-top: calc(var(--r-cut) * -1); background: var(--c-bg); color: var(--c-text); border-radius: var(--r-cut) var(--r-cut) 0 0; padding: 112px var(--gutter) 128px; text-align: center; }
.after h2 { margin: 0 auto; max-width: 18em; }
.after p { margin: 18px auto 0; max-width: 34em; font-size: var(--fs-body); line-height: 1.75; color: var(--c-muted); }
.stage :focus-visible { outline-color: var(--c-accent); }

/* 页脚 */
.site-footer { padding-top: 72px; padding-bottom: 32px; background: var(--ink-950); color: var(--on-dark-2); }
.footer-grid { display: grid; grid-template-columns: 1.3fr .8fr 1fr; gap: 56px; }
.footer-grid > * { min-width: 0; }
.footer-brand p { max-width: 25em; margin-top: 20px; font-size: var(--fs-nav); color: var(--on-dark-muted); }
.footer-title { margin-bottom: 20px; font-size: var(--fs-sm); font-weight: var(--fw-bold); color: var(--on-dark); }
.footer-links { display: grid; gap: 6px; margin: 0; padding: 0; list-style: none; }
.footer-links a { display: inline-block; padding-block: 6px; font-size: var(--fs-nav); }
.site-footer a:hover { color: var(--c-accent); }
.footer-languages { display: flex; flex-wrap: wrap; gap: 8px 24px; margin-top: 48px; }
.footer-languages a { min-height: 44px; display: inline-flex; align-items: center; font-size: var(--fs-sm); }
.footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px; margin-top: 24px; padding-top: 24px; border-top: 1px solid var(--ink-window-line); font-size: var(--fs-sm); color: var(--on-dark-muted); }
.site-footer :focus-visible, #site-header :focus-visible { outline-color: var(--c-accent); }

@media (max-width: 1360px) {
  :root { --dev-scale: .9; }
  .topnav-links { gap: 26px; }
}
@media (max-width: 1080px) {
  .desktop-nav { display: none; }
  .header-tools { margin-left: auto; }
  .menu-toggle { display: inline-flex; }
}
@media (min-width: 1081px) {
  .mobile-drawer, .nav-veil { display: none !important; }
}
@media (max-width: 1220px) {
  :root { --dev-scale: .8; --gutter: 40px; }
  .copy { padding-right: 36px; }
  .topnav { gap: 28px; }
  .topnav-links { gap: 20px; }
}
@media (max-height: 820px) and (min-width: 1081px) {
  :root { --dev-scale: .84; }
}
@media (max-width: 1080px) {
  :root { --dev-scale: .86; }
  .stage { grid-template-columns: minmax(0, 1fr); grid-template-rows: var(--head-h) auto auto; height: auto; }
  .copy { padding: 48px var(--gutter) 40px; }
  .copy-main { margin: 0; }
  .facts { margin-top: 40px; }
  .panel { grid-column: 1; grid-row: 3; margin: 0 var(--gutter); height: 600px; padding-bottom: 40px; border-radius: var(--r-panel) var(--r-panel) 0 0; }
  .footer-grid { gap: 32px; }
}
@media (max-width: 768px) {
  :root { --fs-h1: 30px; --section-space: 80px; }
  .title { font-size: 30px; }
  .grid-pair { grid-template-columns: minmax(0, 1fr); }
  .footer-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .footer-brand { grid-column: 1 / -1; }
  .accent-section { padding: 56px 24px; }
}
@media (max-width: 640px) {
  :root { --gutter: 20px; --dev-scale: .54; --fs-h1: 28px; }
  .topnav { gap: 12px; }
  .brand { gap: 8px; font-size: var(--fs-nav); }
  .brand img { width: 28px; height: 28px; }
  .lang { padding-inline: 12px; min-height: 44px; }
  .lang-full { display: none; }
  .lang-short { display: inline; }
  .header-tools { margin-left: auto; gap: 8px; }
  .title { font-size: 28px; }
  .lede { font-size: var(--fs-button); }
  .btn { min-height: 50px; padding: 12px 20px; font-size: var(--fs-nav); }
  .panel { height: 400px; padding-bottom: 36px; }
  .device { transform: scale(var(--dev-scale)); }
  .subs, .tilt, [data-tilt] { transform: none; }
  .facts li { padding: 6px 14px 6px 0; border-left: 0; }
  .platforms { gap: 8px; }
  .platforms a { padding-inline: 10px; font-size: var(--fs-xs); }
  .after { padding: 80px var(--gutter) 96px; }
  .after h2 { font-size: var(--fs-h2); }
  .card, .panel-card { padding: 24px; }
  .section-heading { margin-bottom: 36px; }
  .footer-grid { grid-template-columns: minmax(0, 1fr); }
  .footer-brand { grid-column: auto; }
}
@media (max-width: 359px) {
  :root { --gutter: 16px; --dev-scale: .45; }
  .brand { font-size: var(--fs-sm); gap: 6px; }
  .brand img { width: 24px; height: 24px; }
  .topnav { gap: 8px; }
  .header-tools { gap: 4px; }
  .lang { padding-inline: 10px; }
  .title { font-size: 26px; }
  .copy { padding-top: 32px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
  .reveal-pending .reveal:not(.shown) { opacity: 1; transform: none; }
}