:root {
  --bg: #ffffff;
  --bg-panel: #f6f8fb;
  --bg-panel-2: #eef1f6;
  --border: #e3e8ef;
  --border-soft: #edf1f6;
  --border-strong: #d2d9e4;
  --accent: #6b2bf2;
  --accent-dark: #4a17c2;
  --accent-soft: rgba(107,43,242,.08);
  --accent-shadow: rgba(74,23,194,.38);
  --text: #101b3c;
  --text-muted: #55667f;
  --text-faint: #8a97ab;
  --success: #12a26b;
  --success-ink: #08764b;
  --success-soft: rgba(18,162,107,.18);
  --warn: #e8890c;
  --warn-ink: #8b5105;
  --error: #d92d4b;
  --on-accent: #ffffff;
  --on-accent-line: rgba(255,255,255,.2);
  --flow-1: #ff8a1f;
  --flow-2: #ff4f9a;
  --flow-3: #a35bff;
  --flow-4: #6b2bf2;
  --glass-fill: rgba(255,255,255,.6);
  --glass-line: rgba(255,255,255,.92);
  --glass-hi: rgba(255,255,255,.78);
  --glass-mid: rgba(255,255,255,.5);
  --glass-lo: rgba(255,255,255,.32);
  --device-ink: #0c1122;
  --silver-1: #f4f6f9;
  --silver-2: #d6dce5;
  --silver-3: #a6afbd;
  --silver-4: #7e8899;
  --silver-edge: rgba(126,136,153,.45);
  --ink-shadow-1: rgba(16,27,60,.05);
  --ink-shadow-2: rgba(16,27,60,.12);
  --ink-shadow-3: rgba(16,27,60,.22);
  --floor: rgba(16,27,60,.22);
  --clear: transparent;
  --font-display: "Inter","Noto Sans SC",-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-body: "Inter","Noto Sans SC",-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-mono: "JetBrains Mono",ui-monospace,"SF Mono",Menlo,Consolas,monospace;
  --weight-normal: 400;
  --weight-medium: 500;
  --weight-strong: 600;
  --r-card: 8px;
  --r-btn: 6px;
  --r-pill: 999px;
  --r-shot: 8px;
  --r-tag: 6px;
  --r-mark: 8px;
  --r-device: 26px;
  --r-bezel: 23px;
  --r-screen: 19px;
  --r-key: 2px;
  --tracking-display: -.02em;
  --shell: 1200px;
  --reading: 800px;
  --header-shell: 1280px;
  --gutter: 32px;
  --nav-h: 64px;
  --tag-tilt: -9deg;
  --ease-soft: cubic-bezier(.22,.61,.36,1);
  --duration-fast: .16s;
  --duration-reveal: .55s;
  --shadow-card: 0 1px 1px var(--ink-shadow-1),0 8px 22px -10px var(--ink-shadow-2);
  --shadow-pop: 0 2px 6px var(--ink-shadow-1),0 18px 40px -16px var(--ink-shadow-3);
  --shadow-cta: inset 0 1px 0 var(--on-accent-line),0 1px 2px var(--ink-shadow-2),0 8px 18px -8px var(--accent-shadow);
  --shadow-tag: inset 0 1px 0 var(--glass-hi),0 3px 0 -1px var(--glass-mid),0 14px 30px -14px var(--accent-shadow),0 2px 6px -2px var(--ink-shadow-2);
  --gradient-flow: linear-gradient(92deg,var(--flow-1) 0%,var(--flow-2) 38%,var(--flow-3) 72%,var(--flow-4) 100%);
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 24px); }
html.nav-open { overflow: hidden; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
::selection { background: var(--accent-soft); color: var(--text); }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
button:disabled { cursor: not-allowed; }
img, svg { max-width: 100%; }
svg { flex-shrink: 0; }
img { vertical-align: middle; }
[hidden] { display: none !important; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: var(--r-btn); }
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: var(--weight-normal);
  letter-spacing: var(--tracking-display);
  line-height: 1.25;
  text-wrap: balance;
}
h1 { font-size: clamp(34px,2.2vw + 16px,48px); line-height: 1.15; }
h2 { font-size: clamp(24px,1vw + 18px,32px); }
h3 { font-size: 22px; }
p { margin-top: 0; }
strong { font-weight: var(--weight-strong); }
code, pre, kbd { font-family: var(--font-mono); }
code { overflow-wrap: anywhere; font-size: .9em; }
pre {
  max-width: 100%;
  min-width: 0;
  overflow-x: auto;
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: var(--r-card);
  background: var(--bg-panel);
  color: var(--text);
  font-size: 13px;
  -webkit-overflow-scrolling: touch;
}
pre code { white-space: pre; overflow-wrap: normal; font-size: inherit; }
hr { border: 0; border-top: 1px solid var(--border); margin-block: 32px; }
.shell, .wrap {
  width: 100%;
  max-width: calc(var(--shell) + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.reading { max-width: calc(var(--reading) + var(--gutter) * 2); }
.section { padding-top: 80px; padding-bottom: 80px; }
.section--panel { background: var(--bg-panel); color: var(--text); }
.section-title { margin: 0 0 28px; max-width: 900px; }
.section-title__lead { color: var(--text); }
.section-title__tail, .muted { color: var(--text-muted); }
.keep { white-space: nowrap; }
.prose { min-width: 0; }
.prose p, .prose li { line-height: 1.85; }
.prose h2 { margin-top: 56px; }
.prose h3 { margin-top: 32px; }
.prose a:not(.btn):not(.app-store-button) { color: var(--accent-dark); text-decoration: underline; text-underline-offset: 3px; }
.prose > :first-child { margin-top: 0; }
.grid { display: grid; gap: 24px; }
.grid--two { grid-template-columns: repeat(2,minmax(0,1fr)); }
.grid--three { grid-template-columns: repeat(3,minmax(0,1fr)); }
.grid > *, .flex > *, .bento > * { min-width: 0; }
.stack > * + * { margin-top: 24px; }
.skip {
  position: absolute;
  left: 16px;
  top: -60px;
  z-index: 100;
  padding: 8px 14px;
  background: var(--text);
  color: var(--on-accent);
  border-radius: var(--r-btn);
  font-size: 14px;
}
.skip:focus { top: 12px; }
.btn {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  gap: 9px;
  min-height: 44px;
  padding: 10px 18px;
  border: 1px solid var(--clear);
  border-radius: var(--r-btn);
  font-size: 15px;
  font-weight: var(--weight-medium);
  line-height: 1.4;
  text-align: center;
  transition: background var(--duration-fast),border-color var(--duration-fast),color var(--duration-fast);
}
.btn svg { width: 16px; height: 16px; }
.btn--primary { background: var(--accent); color: var(--on-accent); box-shadow: var(--shadow-cta); }
.btn--primary:hover, .btn--primary.is-hover { background: var(--accent-dark); color: var(--on-accent); }
.btn--ghost { background: var(--bg); color: var(--accent-dark); border-color: var(--border-strong); box-shadow: var(--shadow-card); }
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn--text { background: var(--clear); color: var(--accent-dark); padding-inline: 0; }
.btn:disabled, .btn[aria-disabled="true"] { background: var(--bg-panel-2); color: var(--text-muted); border-color: var(--border); box-shadow: none; }
.btn[aria-disabled="true"] { pointer-events: none; }
.btn.is-focus { outline: 2px solid var(--accent); outline-offset: 3px; }
.card, .panel {
  min-width: 0;
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: var(--r-card);
  background: var(--bg);
  color: var(--text);
  box-shadow: var(--shadow-card);
}
.card h3, .panel h3 { margin-top: 0; }
.card p:last-child, .panel p:last-child { margin-bottom: 0; }
.panel--soft { background: var(--bg-panel); color: var(--text); }
.reveal { opacity: 1; transform: none; }
.reveal.is-waiting { opacity: 0; transform: translateY(16px); }
.reveal.shown { opacity: 1; transform: none; transition: opacity var(--duration-reveal) var(--ease-soft),transform var(--duration-reveal) var(--ease-soft); }

/* 页头使用独立宽版心，不继承正文阅读宽度。 */
#site-header { position: sticky; top: 0; z-index: 40; }
.topbar { height: var(--nav-h); background: var(--bg); color: var(--text); border-bottom: 1px solid var(--border); }
.topbar__row {
  position: relative;
  display: flex;
  align-items: center;
  gap: 32px;
  height: 100%;
  width: 100%;
  max-width: min(100%,calc(var(--header-shell) + var(--gutter) * 2));
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.brand { display: inline-flex; align-items: center; gap: 11px; flex-shrink: 0; }
.brand__mark { width: 30px; height: 30px; flex-shrink: 0; border-radius: var(--r-pill); }
.brand__placeholder {
  display: block;
  width: 30px;
  height: 30px;
  flex-shrink: 0;
  border-radius: var(--r-mark);
  border: 1px solid var(--border-strong);
  background: var(--bg-panel-2);
  color: var(--text);
  box-shadow: inset 0 1px 0 var(--glass-hi),0 1px 2px var(--ink-shadow-1);
}
.brand__name { font-size: 15px; font-weight: var(--weight-medium); letter-spacing: -.01em; }
.brand__tag { padding-left: 11px; border-left: 1px solid var(--border); font-size: 12px; line-height: 1; color: var(--text-muted); }
.nav { min-width: 0; height: 100%; }
.nav > ul { display: flex; align-items: center; list-style: none; margin: 0; padding: 0; gap: 2px; height: 100%; }
.nav > ul > li { height: 100%; flex-shrink: 0; }
.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  height: var(--nav-h);
  padding: 0 12px;
  border: 0;
  background: var(--clear);
  color: var(--text-muted);
  font-size: 14.5px;
  white-space: nowrap;
}
.nav-link:hover, .nav-link[aria-current="page"] { color: var(--text); }
.nav-link[aria-current="page"] { font-weight: var(--weight-medium); }
.nav-link[aria-current="page"]::after { content: ""; position: absolute; left: 12px; right: 12px; bottom: -1px; height: 2px; border-radius: var(--r-pill); background: var(--accent); }
.nav-link svg { width: 10px; height: 10px; }
.nav-more, .language-picker { position: relative; }
.nav-more__panel, .language-panel {
  position: absolute;
  top: calc(100% + 8px);
  width: 280px;
  padding: 8px;
  border: 1px solid var(--border);
  border-radius: var(--r-card);
  background: var(--bg);
  color: var(--text);
  box-shadow: var(--shadow-pop);
  z-index: 5;
}
.nav-more__panel { left: -4px; }
.nav-more__label { display: block; padding: 6px 10px 4px; color: var(--text-muted); font-size: 12px; }
.nav-more__item { display: block; min-height: 44px; padding: 8px 10px; border-radius: var(--r-btn); }
.nav-more__item:hover, .language-panel a:hover { background: var(--bg-panel); color: var(--text); }
.nav-more__item b { display: block; font-size: 14px; font-weight: var(--weight-medium); }
.nav-more__item span { display: block; font-size: 12.5px; color: var(--text-muted); line-height: 1.45; }
.topbar__tools { display: flex; align-items: center; gap: 8px; margin-left: auto; flex-shrink: 0; }
.lang {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 34px;
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: var(--r-btn);
  background: var(--bg);
  color: var(--text-muted);
  font-size: 14px;
  white-space: nowrap;
}
.lang svg { width: 15px; height: 15px; }
.lang__short { display: none; }
.language-panel { width: 180px; right: 0; }
.language-panel a { display: block; min-height: 44px; padding: 10px 12px; border-radius: var(--r-btn); font-size: 14px; }
.language-panel a[aria-current="true"] { color: var(--accent-dark); background: var(--accent-soft); }
.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  border: 1px solid var(--border);
  border-radius: var(--r-btn);
  background: var(--bg);
  color: var(--text);
}
.menu-toggle svg { width: 20px; height: 20px; }
.mobile-drawer { display: none; }
.menu-veil { position: fixed; inset: var(--nav-h) 0 0; z-index: -1; border: 0; background: var(--ink-shadow-3); color: var(--text); }
.preview-menu { position: relative; }
.preview-menu summary { list-style: none; cursor: pointer; }
.preview-menu summary::-webkit-details-marker { display: none; }

/* 静态首屏：光带、规则字条与抽象设备，不模拟应用界面。 */
.hero {
  position: relative;
  overflow-x: clip;
  overflow-y: clip;
  min-height: clamp(620px,calc(100vh - var(--nav-h) - 70px),800px);
  display: flex;
  align-items: center;
}
.hero-guides { position: absolute; inset: 0; pointer-events: none; }
.hero-guides::before {
  content: "";
  position: absolute;
  inset-block: 0;
  left: 50%;
  width: min(calc(var(--shell) + 32px),calc(100% - 32px));
  transform: translateX(-50%);
  border-inline: 1px solid var(--border-soft);
}
.hero > .shell { position: relative; z-index: 2; pointer-events: none; }
.hero-copy { max-width: 640px; padding-top: 48px; padding-bottom: 56px; pointer-events: auto; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 26px;
  padding: 4px 13px 4px 10px;
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  background: var(--bg);
  color: var(--text);
  box-shadow: 0 1px 2px var(--ink-shadow-1);
  font-size: 13px;
}
.hero-badge__dot { width: 7px; height: 7px; flex-shrink: 0; border-radius: var(--r-pill); background: var(--success); box-shadow: 0 0 0 3px var(--success-soft); }
.hero-badge__sep { color: var(--text-muted); }
.hero-title { margin: 0; font-size: clamp(34px,2.2vw + 16px,48px); line-height: 1.15; }
.hero-title__lead { color: var(--text); }
.hero-title__tail { color: var(--text-muted); }
.hero-title__grad {
  font-style: normal;
  background: var(--gradient-flow);
  color: var(--clear);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: var(--clear);
}
.hero-subtitle { max-width: 580px; margin: 16px 0 0; font-size: 22px; line-height: 1.5; color: var(--text-muted); }
.hero-cta { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-top: 32px; }
.hero-fact { max-width: 560px; margin: 26px 0 0; font-size: 15.5px; line-height: 1.75; color: var(--text-muted); }
.hero-fact strong { color: var(--text); font-weight: var(--weight-medium); }
.device-row { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 22px; list-style: none; margin: 28px 0 0; padding: 20px 0 0; border-top: 1px solid var(--border); }
.device { display: inline-flex; align-items: center; gap: 7px; font-size: 13.5px; color: var(--text); }
.device svg { width: 18px; height: 18px; color: var(--text-muted); }
.device:hover { color: var(--accent-dark); }
.store-pill { display: inline-flex; align-items: center; padding: 3px 11px; border: 1px solid var(--border-strong); border-radius: var(--r-pill); background: var(--bg-panel); color: var(--text); font-size: 12.5px; }
.stage { position: absolute; top: 0; right: 0; z-index: 1; width: min(60vw,880px); aspect-ratio: 860/780; pointer-events: none; }
.rb { position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible; }
.st-1 { stop-color: var(--flow-1); }
.st-2 { stop-color: var(--flow-2); }
.st-3 { stop-color: var(--flow-3); }
.st-4 { stop-color: var(--flow-4); }
.ribbon { fill: none; stroke: url(#hero-flow); stroke-linecap: round; }
.ribbon--1 { stroke-width: 105px; opacity: .35; }
.ribbon--2 { stroke-width: 74px; opacity: .45; }
.ribbon--3 { stroke-width: 64px; opacity: .55; }
.ribbon--4 { stroke-width: 52px; opacity: .6; }
.ribbon--5 { stroke-width: 42px; opacity: .75; }
.ribbon--6 { stroke-width: 30px; opacity: .9; }
.ribbon--7 { stroke-width: 18px; opacity: .6; }
.rb-haze { opacity: .42; }
.rule-tag {
  position: absolute;
  margin: 0;
  padding: 7px 12px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.3;
  white-space: nowrap;
  background: var(--glass-fill);
  color: var(--text);
  border: 1px solid var(--glass-line);
  border-radius: var(--r-tag);
  backdrop-filter: blur(12px) saturate(1.4);
  -webkit-backdrop-filter: blur(12px) saturate(1.4);
  box-shadow: var(--shadow-tag);
  transform: translate(-50%,-50%) rotate(var(--tag-tilt));
}
.rt-1 { left: 81.4%; top: 12.8%; }
.rt-2 { left: 75.6%; top: 24.4%; }
.rt-3 { left: 68.6%; top: 35.9%; }
.rt-4 { left: 63.4%; top: 46.2%; }
.rp--proxy { color: var(--accent-dark); font-weight: var(--weight-strong); }
.rp--direct { color: var(--success-ink); font-weight: var(--weight-strong); }
.rp--reject { color: var(--error); font-weight: var(--weight-strong); }
.iphone {
  position: absolute;
  left: 49.07%;
  top: 52.56%;
  width: 18.14%;
  aspect-ratio: 71.5/147;
  padding: 3px;
  border-radius: var(--r-device);
  background: linear-gradient(150deg,var(--silver-1),var(--silver-2) 26%,var(--silver-3) 52%,var(--silver-2) 76%,var(--silver-1));
  color: var(--text);
  box-shadow: inset 0 0 0 1px var(--silver-edge),0 2px 4px var(--ink-shadow-1),0 22px 34px -20px var(--ink-shadow-3),0 46px 70px -30px var(--accent-shadow);
}
.iphone__key { position: absolute; width: 3px; border-radius: var(--r-key); background: linear-gradient(90deg,var(--silver-4),var(--silver-3)); }
.iphone__key--action { left: -2px; top: 19%; height: 5%; }
.iphone__key--up { left: -2px; top: 27%; height: 9%; }
.iphone__key--down { left: -2px; top: 38%; height: 9%; }
.iphone__key--side { right: -2px; top: 30%; height: 14%; }
.iphone__bezel { height: 100%; padding: 5px; border-radius: var(--r-bezel); background: var(--device-ink); color: var(--on-accent); }
.iphone__screen {
  position: relative;
  height: 100%;
  overflow: hidden;
  border-radius: var(--r-screen);
  background: radial-gradient(90% 55% at 80% 2%,var(--flow-1),var(--clear) 62%),radial-gradient(80% 60% at 16% 48%,var(--flow-2),var(--clear) 66%),linear-gradient(172deg,var(--flow-1),var(--flow-2) 38%,var(--flow-3) 70%,var(--flow-4));
  color: var(--text);
}
.iphone__screen::before { content: ""; position: absolute; inset: 0; background: radial-gradient(70% 38% at 22% 8%,var(--glass-mid),var(--clear) 72%); }
.iphone__island { position: absolute; top: 8px; left: 50%; width: 32%; height: 15px; transform: translateX(-50%); border-radius: var(--r-pill); background: var(--device-ink); }
.iphone__lines { position: absolute; left: 14%; right: 14%; bottom: 17%; display: flex; flex-direction: column; gap: 9px; }
.iphone__lines span { display: block; height: 6px; border-radius: var(--r-pill); }
.iphone__lines span:nth-child(1) { width: 74%; background: var(--glass-hi); }
.iphone__lines span:nth-child(2) { width: 56%; background: var(--glass-mid); }
.iphone__lines span:nth-child(3) { width: 38%; background: var(--glass-lo); }
.iphone-floor { position: absolute; left: 58.14%; top: 95%; width: 30%; height: 4%; transform: translate(-50%,-50%); background: radial-gradient(closest-side,var(--floor),var(--clear)); }
.hero-band-m { display: none; }
.store-band__inner { border-block: 1px solid var(--border); padding-top: 44px; padding-bottom: 56px; }
.store-band__note { margin: 18px 0 0; font-size: 15px; color: var(--text-muted); }
.store-band__note a { color: var(--accent-dark); text-decoration: underline; text-underline-offset: 3px; }

/* 页脚 */
.site-footer { padding-top: 60px; padding-bottom: 28px; border-top: 1px solid var(--border); background: var(--bg); color: var(--text); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1.2fr .8fr; gap: 40px; }
.footer-grid > * { min-width: 0; }
.footer-brand p { max-width: 320px; margin-top: 18px; font-size: 14px; color: var(--text-muted); }
.footer-title { margin: 0 0 16px; font-size: 14px; font-weight: var(--weight-medium); }
.footer-list { list-style: none; padding: 0; margin: 0; }
.footer-list a { display: block; padding-block: 6px; font-size: 13px; color: var(--text-muted); overflow-wrap: anywhere; }
.footer-list a:hover { color: var(--accent-dark); }
.footer-bottom { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px 24px; margin-top: 44px; padding-top: 24px; border-top: 1px solid var(--border); font-size: 12px; color: var(--text-muted); }
.footer-bottom p { margin: 0; }
.footer-legal { display: flex; flex-wrap: wrap; gap: 20px; }
.footer-legal a { text-decoration: underline; text-underline-offset: 3px; }

@media (max-width: 1279px) {
  .nav { display: none; }
  .brand__tag { display: none; }
  .menu-toggle { display: inline-flex; }
  .topbar__tools { margin-left: auto; }
  .mobile-drawer:not([hidden]) {
    position: absolute;
    display: block;
    inset-inline: 0;
    top: 100%;
    max-height: calc(100dvh - var(--nav-h));
    overflow-y: auto;
    overscroll-behavior: contain;
    padding: 16px var(--gutter) 24px;
    border-bottom: 1px solid var(--border);
    background: var(--bg);
    color: var(--text);
    box-shadow: var(--shadow-pop);
    z-index: 4;
  }
  .mobile-drawer a { display: flex; align-items: center; width: 100%; min-height: 44px; padding: 10px 12px; border-radius: var(--r-btn); font-size: 15px; }
  .mobile-drawer a:hover, .mobile-drawer a[aria-current] { background: var(--bg-panel); color: var(--accent-dark); }
  .mobile-drawer ul { list-style: none; margin: 0; padding: 0; }
  .mobile-drawer__languages { margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--border); }
  .mobile-drawer__label { margin: 0 12px 8px; font-size: 12px; color: var(--text-muted); }
}
@media (max-width: 900px) {
  :root { --gutter: 20px; }
  .topbar__row { gap: 16px; }
  .hero { display: block; min-height: 0; padding-bottom: 28px; }
  .hero-guides { display: none; }
  .hero-band-m { display: block; position: absolute; top: 0; left: 0; width: 100%; height: 150px; pointer-events: none; }
  .hero-copy { max-width: none; padding-top: 120px; padding-bottom: 0; }
  .hero-title { font-size: clamp(24px,5vw + 8px,30px); }
  .hero-subtitle { font-size: 20px; }
  .hero-fact { font-size: 15px; }
  .stage { position: relative; top: auto; right: auto; width: 100%; aspect-ratio: auto; height: 340px; margin-top: 20px; }
  .rb, .rule-tag { display: none; }
  .iphone { left: 50%; top: 12px; width: 146px; transform: translateX(-50%); }
  .iphone-floor { left: 50%; top: auto; bottom: 4px; width: 200px; height: 26px; transform: translateX(-50%); }
  .footer-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
}
@media (max-width: 768px) {
  h1 { font-size: clamp(24px,5vw,30px); }
  .grid--three { grid-template-columns: 1fr; }
  .section { padding-top: 52px; padding-bottom: 52px; }
}
@media (max-width: 640px) {
  :root { --gutter: 16px; }
  .topbar__row { gap: 8px; }
  .brand { gap: 7px; min-width: 0; }
  .brand__name { max-width: 160px; font-size: 12px; line-height: 1.35; }
  .brand__mark, .brand__placeholder { width: 26px; height: 26px; }
  .topbar__tools { margin-left: auto; gap: 5px; }
  .lang { min-height: 44px; padding-inline: 9px; gap: 5px; }
  .lang svg { display: none; }
  .lang__full { display: none; }
  .lang__short { display: inline; }
  .grid--two, .footer-grid { grid-template-columns: 1fr; }
  .card, .panel { padding: 22px; }
  .tilt, [data-tilt] { transform: none; }
  .hero-cta { margin-top: 24px; gap: 10px; }
  .hero-cta .btn { padding-inline: 14px; }
  .device-row { gap: 12px 16px; }
  .footer-grid { gap: 28px; }
  .footer-bottom { margin-top: 28px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal, .reveal.is-waiting { opacity: 1; transform: none; }
}