:root {
  color-scheme: dark;
  --bg: #0d0f0e;
  --surface: #151817;
  --surface-2: #1c201e;
  --sunken: #0f1211;
  --line: rgba(236, 244, 239, 0.09);
  --line-2: rgba(236, 244, 239, 0.16);
  --text: #eef2ef;
  --text-2: #c3cbc7;
  --muted: #9aa49f;
  --faint: #7d8782;
  --green: #5fcb86;
  --green-hover: #78d89a;
  --green-ink: #08160e;
  --amber: #f0b54a;
  --red: #e98a7c;
  --sans: "Segoe UI", "PingFang SC", "Microsoft YaHei UI", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, sans-serif;
  --mono: "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.65 var(--sans); -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
img, video { max-width: 100%; }
ul, ol { margin: 0; padding: 0; list-style: none; }
p { margin: 0; text-wrap: pretty; }
/* CJK headings break only at punctuation, never inside a phrase. */
h1, h2, h3 { margin: 0; text-wrap: balance; word-break: keep-all; overflow-wrap: anywhere; }
button { font: inherit; color: inherit; cursor: pointer; }
[hidden] { display: none !important; }
/* Until the script applies a non-default language, keep the pre-rendered Chinese out of view.
   CSS-only safety net: the page reveals itself even if the script never runs. */
html.i18n-pending body { visibility: hidden; animation: i18n-reveal 0s linear 1.5s forwards; }
@keyframes i18n-reveal { to { visibility: visible; } }
[tabindex="-1"]:focus { outline: none; }
.wrap { width: min(1180px, 100% - 40px); margin-inline: auto; }
.i { width: 18px; height: 18px; flex: none; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.i.fill { fill: currentColor; stroke: none; }
.skip { position: absolute; left: 12px; top: -48px; z-index: 20; padding: 8px 14px; border-radius: 8px; background: var(--green); color: var(--green-ink); font-weight: 600; }
.skip:focus { top: 12px; }
:focus-visible { outline: 2px solid var(--green); outline-offset: 3px; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 46px; padding: 0 22px; border-radius: 10px; border: 1px solid transparent; background: transparent; font-weight: 600; font-size: 15px; text-align: center; transition: background-color .15s, border-color .15s; }
.btn-primary { background: var(--green); color: var(--green-ink); }
.btn-primary:hover { background: var(--green-hover); }
.btn-ghost { border-color: var(--line-2); }
.btn-ghost:hover { background: var(--surface-2); }
.btn-sm { min-height: 36px; padding: 0 16px; font-size: 14px; }
.btn[aria-disabled="true"] { background: var(--surface-2); color: var(--faint); cursor: not-allowed; pointer-events: none; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 10; background: rgba(13, 15, 14, 0.86); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); border-bottom: 1px solid var(--line); }
.nav { display: flex; align-items: center; gap: 22px; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; letter-spacing: -0.01em; }
.mark { width: 28px; height: 28px; display: block; }
.nav nav { display: flex; gap: 22px; margin-left: auto; color: var(--muted); font-size: 14px; }
.nav nav a:hover { color: var(--text); }
.lang { min-height: 36px; min-width: 52px; padding: 0 12px; border: 1px solid var(--line-2); border-radius: 10px; background: transparent; font-weight: 600; font-size: 13.5px; }
.lang:hover { background: var(--surface-2); }

/* Section rail (desktop): fixed to the right edge; hover slides out a card of section names */
.rail { position: fixed; right: 0; top: 50%; z-index: 9; display: none; transform: translateY(-50%); }
.rail::before { content: ""; position: absolute; inset: 0; border: 1px solid var(--line-2); border-right: 0; border-radius: 14px 0 0 14px; background: rgba(21, 24, 23, 0.94); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); opacity: 0; transform: translateX(24px); transition: opacity .2s ease, transform .3s cubic-bezier(.2, .8, .2, 1); }
.rail:hover::before, .rail:focus-within::before { opacity: 1; transform: none; }
.rail ol { position: relative; display: flex; flex-direction: column; padding: 10px 0; }
.rail ol::after { content: ""; position: absolute; top: 14px; bottom: 14px; right: 1px; border-right: 1px solid var(--line-2); }
.rail a { position: relative; display: flex; align-items: center; justify-content: flex-end; gap: 12px; height: 32px; padding: 0 14px 0 16px; color: var(--faint); }
.rail-n { font: 600 11.5px var(--mono); letter-spacing: 0.04em; transition: color .2s; }
.rail-t { max-width: 0; overflow: hidden; white-space: nowrap; color: var(--text-2); font-size: 13.5px; opacity: 0; transform: translateX(10px); transition: max-width .3s cubic-bezier(.2, .8, .2, 1), opacity .2s ease, transform .3s cubic-bezier(.2, .8, .2, 1); }
.rail:hover .rail-t, .rail:focus-within .rail-t { max-width: 160px; opacity: 1; transform: none; }
.rail li:nth-child(2) .rail-t { transition-delay: 20ms; } .rail li:nth-child(3) .rail-t { transition-delay: 40ms; }
.rail li:nth-child(4) .rail-t { transition-delay: 60ms; } .rail li:nth-child(5) .rail-t { transition-delay: 80ms; }
.rail li:nth-child(6) .rail-t { transition-delay: 100ms; } .rail li:nth-child(7) .rail-t { transition-delay: 120ms; }
.rail li:nth-child(8) .rail-t { transition-delay: 140ms; }
.rail a:hover .rail-n, .rail a[aria-current="true"] .rail-n { color: var(--green); }
.rail a:hover .rail-t, .rail a[aria-current="true"] .rail-t { color: var(--text); }
.rail a:focus-visible { outline-offset: -2px; }
.rail-marker { position: absolute; top: 0; right: 0; z-index: 1; width: 3px; height: 32px; border-radius: 2px 0 0 2px; background: var(--green); box-shadow: 0 0 12px rgba(95, 203, 134, 0.6); transition: transform .35s cubic-bezier(.2, .8, .2, 1); }

/* Section rail (narrow screens): decorative progress dots in the right gutter */
.rail-dots { position: fixed; right: 6px; top: 50%; z-index: 9; display: flex; flex-direction: column; gap: 12px; transform: translateY(-50%); pointer-events: none; }
.rail-dot { width: 5px; height: 5px; border-radius: 50%; background: rgba(236, 244, 239, 0.22); }
.rail-dots-marker { position: absolute; top: 0; left: 0; width: 5px; height: 15px; border-radius: 3px; background: var(--green); transition: transform .35s cubic-bezier(.2, .8, .2, 1); }
@media (min-width: 1260px) {
  .rail { display: block; }
  .rail-dots { display: none; }
}

/* Shared section */
.block { padding: 104px 0; }
.kicker { color: var(--green); font-weight: 600; font-size: 14px; }
h2 { margin: 10px 0 14px; font-size: clamp(26px, 3.2vw, 38px); line-height: 1.24; letter-spacing: -0.015em; }
h3 { font-size: 18px; line-height: 1.4; }
.sub { max-width: 40em; color: var(--muted); }

/* Hero */
.hero { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); gap: 56px; align-items: center; padding: 72px 0 96px; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; color: var(--green); font-size: 14.5px; font-weight: 600; }
.eyebrow::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--green); }
h1 { margin: 18px 0 20px; font-size: clamp(30px, 3.6vw, 46px); line-height: 1.2; letter-spacing: -0.02em; font-weight: 750; }
html[lang="en"] h1 { font-size: clamp(28px, 3.1vw, 40px); }
.lead { max-width: 32em; color: var(--text-2); font-size: 17.5px; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.meta { margin-top: 18px; color: var(--muted); font-size: 13.5px; }

.hero-visual { position: relative; display: grid; grid-template-columns: minmax(0, 1fr) 210px; gap: 22px; align-items: start; }
.hv-label, .device-label { display: inline-block; margin-bottom: 10px; padding: 3px 10px; border-radius: 999px; background: var(--surface-2); color: var(--text-2); font-size: 12.5px; font-weight: 600; }
.hv-note { grid-column: 1 / -1; color: var(--faint); font-size: 12px; }

/* Device frames */
.laptop-screen { position: relative; border: 1px solid var(--line-2); border-bottom: 0; border-radius: 12px 12px 0 0; background: #121514; overflow: hidden; box-shadow: 0 30px 80px rgba(0, 0, 0, 0.5); }
.laptop-base { height: 12px; margin: 0 -14px; border-radius: 0 0 14px 14px; background: linear-gradient(#2a2f2d, #1b1f1d); border: 1px solid var(--line-2); border-top: 0; }
.win-bar { display: flex; align-items: center; gap: 6px; padding: 9px 12px; border-bottom: 1px solid var(--line); background: #171a19; }
.win-bar i { width: 9px; height: 9px; border-radius: 50%; background: #3a403d; }
.win-bar b { margin-left: 8px; color: var(--muted); font-size: 12px; font-weight: 600; }
.win-body { display: flex; flex-direction: column; gap: 10px; min-height: 250px; padding: 16px; font-size: 13.5px; }
.bubble { max-width: 85%; padding: 9px 12px; border-radius: 12px; line-height: 1.5; }
.bubble.you { align-self: flex-end; background: #26302b; }
.bubble.ai { align-self: flex-start; background: var(--surface-2); }
.bubble.done { color: var(--green); }
.bubble.new { outline: 1.5px solid var(--green); }
.tag { display: inline-block; margin: 6px 6px 0 0; padding: 1px 8px; border-radius: 999px; font-size: 11.5px; font-weight: 600; }
.tag.wait { color: var(--amber); background: rgba(240, 181, 74, 0.13); }
.tag.ok { color: var(--green); background: rgba(95, 203, 134, 0.13); }
.tag.phone { display: block; width: fit-content; margin: 0 0 6px; color: var(--green-ink); background: var(--green); }
.work { padding: 10px 12px; border-radius: 10px; border: 1px solid var(--line); background: var(--sunken); }
.work-h { display: flex; align-items: center; gap: 8px; font-weight: 600; }
.work-l { margin-top: 4px; padding-left: 22px; color: var(--muted); font-size: 13px; }
.work-l.done::before { content: "✓ "; color: var(--green); }
.work-l.wait { color: var(--amber); }
.work-l.wait::before { content: "• "; }
.spinner { width: 14px; height: 14px; flex: none; border-radius: 50%; border: 2px solid rgba(95, 203, 134, 0.25); border-top-color: var(--green); animation: spin 1s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.away { position: absolute; inset: 37px 0 0; display: flex; align-items: flex-start; justify-content: center; padding-top: 14px; background: rgba(9, 11, 10, 0.55); color: var(--text); font-size: 13px; font-weight: 600; }
.away::before { content: ""; position: absolute; inset: 0; backdrop-filter: grayscale(0.6); -webkit-backdrop-filter: grayscale(0.6); }

.phone { width: 100%; padding: 8px; border-radius: 30px; border: 1px solid var(--line-2); background: #0a0b0b; box-shadow: 0 26px 70px rgba(0, 0, 0, 0.6); }
.phone-screen { display: flex; flex-direction: column; gap: 10px; min-height: 320px; padding: 10px 12px 16px; border-radius: 23px; background: #141716; font-size: 12.5px; }
.ph-status { text-align: center; color: var(--muted); font-size: 11px; font-weight: 600; }
.ph-status.lock { margin: 14px 0 8px; color: var(--text); font-size: 34px; font-weight: 300; letter-spacing: 0.02em; }
.ph-empty { color: var(--faint); font-size: 12.5px; }
.notify { padding: 11px 12px; border-radius: 14px; border: 1px solid rgba(240, 181, 74, 0.45); background: rgba(240, 181, 74, 0.08); }
.notify-app { display: flex; align-items: center; gap: 6px; color: var(--muted); font-size: 11px; }
.mini-mark { width: 14px; height: 14px; }
.notify-t { margin-top: 4px; font-weight: 700; font-size: 13px; }
.notify-b { margin-top: 2px; color: var(--text-2); }
.notify code { display: block; margin-top: 8px; padding: 6px 8px; border-radius: 8px; background: #0b0d0c; font: 12px var(--mono); color: #efe1c4; }
.notify-acts { display: flex; gap: 6px; margin-top: 10px; }
.notify-acts > * { flex: 1; min-height: 34px; display: grid; place-items: center; border-radius: 9px; border: 1px solid var(--line-2); background: transparent; font-weight: 700; font-size: 12.5px; }
.notify-acts .ok { border-color: var(--green); background: var(--green); color: var(--green-ink); }
.notify.big .notify-acts > * { min-height: 44px; font-size: 14px; }

/* Hero interaction */
.hv-status { grid-column: 1 / -1; min-height: 3.2em; color: var(--text-2); font-size: 14.5px; }
.hero-visual .hv-note { margin-top: -6px; }
.work-l.run { display: flex; align-items: center; gap: 8px; color: var(--text); }
.work-l.strong { color: var(--green); font-weight: 700; }
.work-l.no { color: var(--red); }
.work-l.no::before { content: "✕ "; }
.bar { display: inline-block; width: 72px; height: 4px; border-radius: 2px; background: var(--line-2); overflow: hidden; }
.bar i { display: block; width: 0; height: 100%; background: var(--green); animation: fill 1.8s ease-out forwards; }
@keyframes fill { to { width: 100%; } }
.try-target { position: relative; }
.hero-visual[data-state="ask"] .try-target { animation: pulse 1.8s ease-out infinite; }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(95, 203, 134, 0.6); } 80%, 100% { box-shadow: 0 0 0 10px rgba(95, 203, 134, 0); } }
.try { position: absolute; right: -4px; top: calc(100% + 9px); padding: 3px 9px; border-radius: 8px; background: var(--text); color: var(--bg); font-size: 11.5px; font-weight: 700; white-space: nowrap; pointer-events: none; }
.try::after { content: ""; position: absolute; right: 18px; bottom: 100%; border: 5px solid transparent; border-bottom-color: var(--text); }
.hero-visual:not([data-state="ask"]) .try { display: none; }
.notify-acts button:hover { filter: brightness(1.08); }
.ph-card { display: flex; align-items: center; gap: 10px; padding: 12px; border-radius: 14px; background: var(--surface-2); font-weight: 600; }
.ph-card.ok { color: var(--green); }
.ph-card.no { border: 1px solid var(--line-2); }
.ph-card.no small { display: block; margin-top: 2px; color: var(--muted); font-weight: 400; font-size: 11.5px; }
.retry { align-self: center; min-height: 36px; padding: 0 16px; border-radius: 999px; border: 1px solid var(--line-2); background: transparent; font-weight: 600; font-size: 12.5px; }
.retry:hover { background: var(--surface-2); }

/* Guided demo */
.demo-block { padding-top: 40px; }
.demo { display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 7fr); gap: 48px; align-items: center; margin-top: 40px; padding: 32px; border-radius: 20px; border: 1px solid var(--line); background: var(--surface); }
.demo-dots { display: flex; gap: 8px; }
.demo-dots li { width: 28px; height: 4px; border-radius: 2px; background: var(--line-2); transition: background-color .2s; }
.demo-dots li.on { background: var(--green); }
.demo-caption { min-height: 190px; margin-top: 22px; }
.demo-count { color: var(--faint); font: 600 12.5px var(--mono); }
.demo-caption h3 { margin-top: 8px; font-size: 22px; line-height: 1.35; }
.demo-caption p:last-child { margin-top: 10px; color: var(--muted); font-size: 15.5px; }
.demo-nav { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.demo-stage { display: grid; grid-template-columns: minmax(0, 1fr) 200px; gap: 24px; align-items: end; }
.device { min-width: 0; transition: opacity .25s; }
.demo[data-focus="phone"] .dv-computer, .demo[data-focus="computer"] .dv-phone { opacity: 0.45; }
.ph-idle { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 10px; flex: 1; text-align: center; color: var(--text-2); }
.ph-sub { color: var(--muted); font-size: 12px; }
.ph-result { padding: 12px; border-radius: 14px; background: var(--surface-2); }
.ph-done { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 15px; }
.check { display: grid; place-items: center; width: 22px; height: 22px; border-radius: 50%; background: var(--green); color: var(--green-ink); font-size: 13px; }
.ph-result .ph-sub { margin: 6px 0 4px; }
.file { font: 12px var(--mono); color: var(--text-2); }
.add { color: var(--green); }
.del { color: var(--red); }
.ph-compose { display: flex; flex-direction: column; gap: 6px; margin-top: auto; }
.ph-compose .bubble { max-width: 100%; }
.ph-sent { align-self: flex-end; color: var(--green); font-size: 11.5px; }
.demo-note { margin-top: 12px; color: var(--faint); font-size: 12.5px; }

/* How it works */
.how { background: var(--sunken); border-block: 1px solid var(--line); }
.diagram { display: grid; grid-template-columns: minmax(0, 1fr) 180px minmax(0, 1fr); align-items: center; gap: 16px; margin-top: 40px; }
.node { padding: 24px; border-radius: 16px; border: 1px solid var(--line-2); background: var(--surface); }
.node-i { width: 34px; height: 34px; margin-bottom: 12px; fill: none; stroke: var(--green); stroke-width: 1.6; stroke-linecap: round; }
.node p { margin-top: 8px; color: var(--muted); font-size: 14.5px; }
.link { display: flex; align-items: center; gap: 8px; color: var(--green); }
.link-line { flex: 1; height: 0; border-top: 2px dashed rgba(95, 203, 134, 0.5); }
.link-label { display: flex; align-items: center; gap: 6px; flex-direction: column; text-align: center; font-size: 12.5px; font-weight: 600; }
.points { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; margin-top: 40px; }
.points li { padding-top: 16px; border-top: 1px solid var(--line); }
.points p { margin-top: 6px; color: var(--muted); font-size: 14.5px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px !important; }
.chips span { padding: 3px 10px; border-radius: 999px; border: 1px solid var(--line-2); color: var(--text); font-size: 12.5px; }

/* Use cases */
.use-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; margin-top: 40px; }
.use-grid li { padding: 22px; border-radius: 14px; border: 1px solid var(--line); background: var(--surface); }
.use-i { display: grid; place-items: center; width: 40px; height: 40px; margin-bottom: 16px; border-radius: 10px; background: rgba(95, 203, 134, 0.1); color: var(--green); }
.use-grid p { margin-top: 6px; color: var(--muted); font-size: 14.5px; }

/* Film */
.film-block { padding-top: 8px; }
.film-head { max-width: 760px; margin: 0 auto; text-align: center; }
.film-head .sub { margin: 0 auto; }
.film-frame { max-width: 920px; margin: 32px auto 0; }
.film-frame video { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; border-radius: 16px; border: 1px solid var(--line-2); background: #000; box-shadow: 0 30px 80px rgba(0, 0, 0, 0.5); }
.film-meta { margin-top: 12px; text-align: center; color: var(--faint); font-size: 13px; }
.film-meta a { color: var(--muted); text-decoration: underline; text-underline-offset: 3px; }

/* Get started */
.start-steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; margin-top: 40px; }
.start-steps li { position: relative; padding: 22px; border-radius: 14px; border: 1px solid var(--line); background: var(--surface); }
.num { display: grid; place-items: center; width: 32px; height: 32px; margin-bottom: 14px; border-radius: 50%; background: var(--green); color: var(--green-ink); font-weight: 700; }
.start-steps p { margin-top: 6px; color: var(--muted); font-size: 14.5px; }

/* Download */
.download { padding-top: 0; }
.dl-note { margin-top: 8px; max-width: 40em; color: var(--text-2); font-size: 15.5px; }
.dl { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; margin-top: 28px; }
.dl-card { display: flex; flex-direction: column; gap: 4px; padding: 26px; border-radius: 16px; border: 1px solid var(--line-2); background: var(--surface); }
.plat { display: flex; align-items: center; gap: 10px; font-size: 21px; }
.plat .i { width: 22px; height: 22px; color: var(--green); }
.dl-kind { color: var(--text-2); font-size: 14.5px; }
.dl-version { color: var(--muted); font-size: 13.5px; }
.dl-card .btn { align-self: flex-start; margin-top: 18px; }
.dl-other { margin-top: 16px; color: var(--faint); font-size: 13px; }

/* FAQ */
.faq { padding-top: 32px; }
.faq-grid { display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 7fr); gap: 48px; }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list details:first-child { border-top: 1px solid var(--line); }
.faq-list summary { display: flex; justify-content: space-between; align-items: center; gap: 16px; min-height: 60px; padding: 14px 0; font-weight: 600; cursor: pointer; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; flex: none; color: var(--muted); font: 400 22px var(--mono); }
.faq-list details[open] summary::after { content: "−"; }
.faq-list p { margin-bottom: 18px; color: var(--muted); }

/* Footer */
.site-footer { border-top: 1px solid var(--line); padding: 48px 0 32px; color: var(--faint); font-size: 13.5px; }
.foot-grid { display: grid; grid-template-columns: minmax(0, 3fr) minmax(0, 2fr) minmax(0, 6fr); gap: 40px; }
.foot-brand .brand { color: var(--text); }
.foot-brand p { margin-top: 10px; color: var(--muted); }
.foot-nav { display: flex; flex-direction: column; gap: 8px; }
.foot-nav a { color: var(--muted); }
.foot-nav a:hover { color: var(--text); }
.credits h2 { margin: 0 0 10px; color: var(--text); font-size: 15px; letter-spacing: 0; }
.credits p { color: var(--muted); }
.credits p + p { margin-top: 8px; }
.credits a { color: var(--text-2); text-decoration: underline; text-underline-offset: 3px; }
.credits-links { display: flex; flex-wrap: wrap; gap: 8px 20px; margin-top: 12px !important; }
.foot-bottom { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; gap: 8px 32px; align-items: start; margin-top: 36px; padding-top: 20px; border-top: 1px solid var(--line); font-size: 12.5px; }
.foot-tm { color: var(--faint); }
.foot-bottom a { color: var(--muted); white-space: nowrap; }

@media (max-width: 1080px) {
  .use-grid, .start-steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .demo { grid-template-columns: 1fr; gap: 28px; }
  .demo-caption { min-height: 0; }
}

@media (max-width: 900px) {
  .nav { gap: 10px; }
  .nav nav { display: none; }
  .lang { margin-left: auto; }
  .hero { grid-template-columns: 1fr; gap: 40px; padding: 32px 0 56px; }
  .lead { font-size: 16px; }
  .cta .btn { flex: 1 1 100%; }
  .hero-visual { grid-template-columns: minmax(0, 1fr) 160px; gap: 14px; }
  .hero-visual .ph-status.lock { font-size: 26px; margin: 8px 0 4px; }
  .hero-visual .win-body { min-height: 200px; padding: 12px; font-size: 12px; }
  .hero-visual .phone-screen { min-height: 250px; font-size: 11.5px; }
  .hero-visual .hv-label { font-size: 11.5px; }
  .block { padding: 68px 0; }
  .demo-block { padding-top: 24px; }
  .demo { padding: 18px; margin-inline: -4px; }
  .demo-stage { grid-template-columns: 1fr; }
  .demo[data-focus="computer"] .dv-phone, .demo[data-focus="phone"] .dv-computer { display: none; }
  .demo .dv-phone { width: min(280px, 100%); margin: 0 auto; }
  .demo .phone-screen { min-height: 340px; font-size: 13.5px; }
  .demo .win-body { min-height: 230px; }
  .demo-nav .btn { flex: 1; }
  .diagram { grid-template-columns: 1fr; }
  .link { flex-direction: column; height: 72px; }
  .link-line { width: 0; height: auto; flex: 1; border-top: 0; border-left: 2px dashed rgba(95, 203, 134, 0.5); }
  .link-label { flex-direction: row; }
  .points, .use-grid, .start-steps, .dl, .faq-grid, .foot-grid, .foot-bottom { grid-template-columns: 1fr; }
  .foot-grid { gap: 28px; }
  .foot-nav { flex-direction: row; flex-wrap: wrap; gap: 8px 18px; }
  .faq-grid { gap: 24px; }
  .film-frame { margin-top: 24px; margin-inline: -8px; }
  .dl-card .btn { align-self: stretch; }
}

@media (max-width: 420px) {
  .hero-visual { grid-template-columns: 1fr; }
  .hv-phone { width: min(230px, 80%); margin: -36px 0 0 auto; position: relative; }
  .hv-phone .hv-label { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
  .hero-visual[data-state="ask"] .try-target { box-shadow: 0 0 0 3px rgba(95, 203, 134, 0.45); }
}