:root {
  color-scheme: light;
  --page: #f5f7fc;
  --page-deep: #edf1f9;
  --surface: #fbfcff;
  --surface-strong: #f0f3fa;
  --ink: #111a33;
  --ink-soft: #26334f;
  --text: #526079;
  --muted: #748099;
  --line: rgba(27, 48, 91, .12);
  --line-strong: rgba(27, 48, 91, .2);
  --blue: #315be8;
  --blue-strong: #2447bd;
  --blue-soft: #e8eeff;
  --blue-pale: #f0f4ff;
  --red: #f43b48;
  --success: #257b67;
  --shadow-soft: 0 18px 54px rgba(30, 54, 104, .1);
  --shadow-screen: 0 28px 74px rgba(30, 54, 104, .2);
  --radius: 28px;
  --radius-small: 14px;
  --container: 1240px;
  --header-height: 72px;
  --ease-out: cubic-bezier(.16, 1, .3, 1);
  --font-sans: "Avenir Next", Avenir, "SF Pro Display", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  min-width: 320px;
  min-height: 100dvh;
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background: var(--page);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
body.menu-open { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, summary { font: inherit; }
button { color: inherit; }
p, h1, h2, h3, figure, blockquote, dl, dd { margin-top: 0; }
.container { width: min(calc(100% - 48px), var(--container)); margin-inline: auto; }
.skip-link { position: fixed; z-index: 100; top: -80px; left: 16px; padding: 10px 16px; border-radius: 10px; color: #f9fbff; background: var(--ink); }
.skip-link:focus { top: 12px; }
:focus-visible { outline: 3px solid rgba(49, 91, 232, .46); outline-offset: 4px; }

.site-header {
  position: sticky;
  z-index: 40;
  top: 0;
  height: var(--header-height);
  border-bottom: 1px solid var(--line);
  background: rgba(245, 247, 252, .94);
  backdrop-filter: blur(16px) saturate(1.1);
}
.nav-shell { width: min(calc(100% - 48px), 1320px); height: 100%; margin-inline: auto; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand { min-width: max-content; display: inline-flex; align-items: center; gap: 10px; }
.brand-mark { width: 42px; height: 42px; border-radius: 11px; object-fit: cover; }
.brand-name { color: var(--ink); font-size: 1.28rem; font-weight: 750; letter-spacing: -.04em; }
.site-nav { display: flex; align-items: center; gap: clamp(16px, 1.8vw, 26px); color: var(--ink-soft); font-size: .86rem; font-weight: 650; }
.site-nav a { min-height: 44px; display: inline-flex; align-items: center; white-space: nowrap; transition: color 180ms var(--ease-out), transform 180ms var(--ease-out); }
.site-nav a:hover { color: var(--blue); }
.site-nav .language-link { margin-inline-start: 3px; padding-inline-start: clamp(16px, 1.8vw, 26px); border-inline-start: 1px solid var(--line); color: var(--muted); }
.site-nav .nav-download { min-height: 42px; padding-inline: 19px; border-radius: var(--radius-small); color: #f9fbff; background: var(--blue); box-shadow: 0 10px 25px rgba(49, 91, 232, .2); }
.site-nav .nav-download:hover { color: #f9fbff; background: var(--blue-strong); transform: translateY(-1px); }
.menu-button { min-width: 78px; min-height: 44px; padding: 0 14px; display: none; align-items: center; justify-content: space-between; gap: 9px; border: 1px solid var(--line); border-radius: var(--radius-small); background: var(--surface); cursor: pointer; }
.menu-button i, .menu-button i::before, .menu-button i::after { width: 16px; height: 1.5px; display: block; background: var(--ink); content: ""; transition: transform 180ms var(--ease-out), opacity 180ms var(--ease-out); }
.menu-button i { position: relative; }
.menu-button i::before { position: absolute; top: -5px; }
.menu-button i::after { position: absolute; top: 5px; }
.menu-button[aria-expanded="true"] i { background: transparent; }
.menu-button[aria-expanded="true"] i::before { top: 0; transform: rotate(45deg); }
.menu-button[aria-expanded="true"] i::after { top: 0; transform: rotate(-45deg); }

.kicker { margin-bottom: 18px; color: var(--blue); font-size: .73rem; font-weight: 800; letter-spacing: .14em; line-height: 1.4; text-transform: uppercase; }
.section-heading .kicker { display: none; }
h1, h2, h3 { color: var(--ink); font-family: var(--font-sans); }
h1 { max-width: 660px; margin-bottom: 24px; font-size: clamp(3.35rem, 5.15vw, 4.8rem); font-weight: 760; letter-spacing: -.06em; line-height: 1.03; }
h1 span { display: block; color: var(--blue); }
h2 { margin-bottom: 18px; font-size: clamp(2.35rem, 4vw, 3.7rem); font-weight: 740; letter-spacing: -.052em; line-height: 1.08; }
h3 { margin-bottom: 10px; font-size: 1.28rem; font-weight: 720; letter-spacing: -.026em; line-height: 1.25; }
.section { padding: clamp(96px, 10vw, 146px) 0; }
.section-heading { max-width: 760px; margin-bottom: clamp(46px, 6vw, 76px); }
.section-heading > p:last-child { max-width: 640px; margin-bottom: 0; color: var(--text); font-size: 1.04rem; }

.button { min-height: 54px; padding: 13px 22px; display: inline-flex; align-items: center; justify-content: center; gap: 6px; border: 1px solid transparent; border-radius: var(--radius-small); font-size: .94rem; font-weight: 730; line-height: 1.25; white-space: nowrap; transition: color 180ms var(--ease-out), background 180ms var(--ease-out), border-color 180ms var(--ease-out), transform 180ms var(--ease-out), box-shadow 180ms var(--ease-out); }
.button:hover { transform: translateY(-2px); }
.button:active { transform: translateY(0) scale(.985); }
.button-primary { color: #f9fbff; background: var(--blue); box-shadow: 0 14px 32px rgba(49, 91, 232, .22); }
.button-primary:hover { color: #f9fbff; background: var(--blue-strong); box-shadow: 0 17px 38px rgba(49, 91, 232, .27); }
.button-secondary { color: var(--ink); border-color: var(--line-strong); background: rgba(251, 252, 255, .9); }
.button-secondary:hover { border-color: rgba(49, 91, 232, .35); background: var(--blue-pale); }

.hero { position: relative; min-height: calc(100dvh - var(--header-height)); padding: clamp(42px, 5.5vw, 74px) 0 58px; overflow: hidden; isolation: isolate; }
.hero::before { position: absolute; z-index: -2; inset: 0; content: ""; background: radial-gradient(circle at 85% 24%, rgba(49, 91, 232, .12), transparent 35%), radial-gradient(circle at 50% 100%, rgba(49, 91, 232, .05), transparent 36%), var(--page); }
.hero::after { position: absolute; z-index: -1; top: 5%; right: -12%; width: min(52vw, 760px); aspect-ratio: 1; border-radius: 50%; background: rgba(232, 238, 255, .72); content: ""; filter: blur(2px); }
.hero-layout { min-height: min(700px, calc(100dvh - 118px)); display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(440px, .85fr); align-items: start; gap: clamp(24px, 3vw, 44px); }
.hero-copy { position: relative; z-index: 4; padding-top: clamp(42px, 5vw, 66px); }
.hero-brandmark { width: 82px; height: 82px; margin-bottom: 30px; border-radius: 22px; box-shadow: 0 14px 38px rgba(244, 59, 72, .14); object-fit: cover; }
.hero-lead { max-width: 600px; margin-bottom: 30px; color: var(--text); font-size: clamp(1.02rem, 1.4vw, 1.2rem); line-height: 1.72; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.hero-product { position: relative; min-height: 680px; margin: 0; }
.hero-product figcaption { position: absolute; right: 3%; bottom: 0; color: var(--muted); font-size: .72rem; letter-spacing: .05em; }
.hero-screen { position: absolute; overflow: hidden; border: 1px solid rgba(255, 255, 255, .82); border-radius: 32px; background: var(--surface); box-shadow: var(--shadow-screen); }
.hero-screen img { width: 100%; height: auto; }
.hero-screen-primary { z-index: 3; top: 0; left: 22%; width: 270px; transform: rotate(-2.3deg); animation: hero-arrive-primary 760ms var(--ease-out) both; }
.hero-screen-secondary { z-index: 2; top: 68px; right: -5%; width: 216px; transform: rotate(4deg); animation: hero-arrive-secondary 850ms 80ms var(--ease-out) both; }
.hero-screen-tertiary { z-index: 1; top: 154px; left: 0; width: 196px; transform: rotate(-8deg); opacity: .94; animation: hero-arrive-tertiary 900ms 140ms var(--ease-out) both; }
@keyframes hero-arrive-primary { from { opacity: 0; transform: translateY(34px) rotate(-4deg); } to { opacity: 1; transform: translateY(0) rotate(-2.3deg); } }
@keyframes hero-arrive-secondary { from { opacity: 0; transform: translate(30px, 42px) rotate(7deg); } to { opacity: 1; transform: translate(0, 0) rotate(4deg); } }
@keyframes hero-arrive-tertiary { from { opacity: 0; transform: translate(-26px, 48px) rotate(-11deg); } to { opacity: .94; transform: translate(0, 0) rotate(-8deg); } }

.fact-rail { padding: 14px 0 36px; }
.fact-rail dl { margin: 0; padding: 22px 0; display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.fact-rail dl div { min-width: 0; padding: 5px 28px; border-inline-end: 1px solid var(--line); }
.fact-rail dl div:first-child { padding-inline-start: 0; }
.fact-rail dl div:last-child { padding-inline-end: 0; border-inline-end: 0; }
.fact-rail dt { color: var(--muted); font-size: .72rem; font-weight: 650; letter-spacing: .05em; }
.fact-rail dd { margin: 4px 0 0; color: var(--ink); font-size: 1.07rem; font-weight: 720; }

.global-social { background: var(--page); }
.global-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 18px; }
.global-card { min-width: 0; min-height: 220px; padding: clamp(28px, 3.2vw, 42px); display: flex; flex-direction: column; justify-content: flex-end; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.global-card:nth-child(1) { grid-column: 1 / span 5; background: var(--blue-pale); }
.global-card:nth-child(2) { grid-column: 6 / span 7; }
.global-card:nth-child(3) { grid-column: 1 / span 7; }
.global-card:nth-child(4) { grid-column: 8 / span 5; background: var(--surface-strong); }
.global-tag { display: block; margin-bottom: auto; padding-bottom: 30px; color: var(--blue); font-size: .74rem; font-weight: 760; }
.global-card h3 { max-width: 480px; margin-bottom: 10px; font-size: clamp(1.35rem, 2vw, 1.8rem); }
.global-card p { max-width: 540px; margin: 0; color: var(--text); font-size: .91rem; line-height: 1.7; }

.mechanism { background: var(--surface); }
.journey-map { margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); list-style: none; }
.journey-map li { min-width: 0; padding: 28px clamp(18px, 2.5vw, 34px) 6px; border-top: 1px solid var(--line-strong); border-inline-end: 1px solid var(--line); }
.journey-map li:first-child { padding-inline-start: 0; }
.journey-map li:last-child { padding-inline-end: 0; border-inline-end: 0; }
.journey-index { display: none; }
.journey-symbol { width: 70px; height: 70px; margin-bottom: 38px; position: relative; display: grid; place-items: center; border-radius: 22px; border: 1px solid rgba(49, 91, 232, .18); background: var(--blue-pale); }
.journey-map h3 { max-width: 210px; font-size: 1.16rem; }
.journey-map p { max-width: 225px; margin-bottom: 0; color: var(--text); font-size: .88rem; }
.symbol-target i { width: 34px; height: 34px; position: relative; border: 2px solid var(--blue); border-radius: 50%; }
.symbol-target i::before { position: absolute; inset: 7px; border: 2px solid var(--blue); border-radius: 50%; content: ""; }
.symbol-target i::after { position: absolute; top: 50%; left: 50%; width: 7px; height: 7px; transform: translate(-50%, -50%); border-radius: 50%; background: var(--blue); content: ""; }
.symbol-match i { width: 34px; height: 34px; position: absolute; top: 18px; border: 2px solid var(--blue); border-radius: 50%; background: var(--surface); }
.symbol-match i:first-child { left: 13px; }
.symbol-match i:last-child { right: 13px; background: var(--blue-soft); }
.symbol-confirm { display: flex; align-items: center; justify-content: center; }
.symbol-confirm i { width: 34px; height: 34px; display: grid; place-items: center; border: 2px solid var(--surface); border-radius: 50%; color: #f9fbff; background: var(--blue); font-style: normal; font-weight: 800; }
.symbol-confirm i + i { margin-inline-start: -8px; background: var(--success); }
.symbol-progress { display: flex; align-items: flex-end; justify-content: center; gap: 4px; }
.symbol-progress i { width: 8px; height: 22px; border-radius: 5px; background: var(--blue); }
.symbol-progress i:nth-child(2) { height: 30px; }
.symbol-progress i:nth-child(3) { height: 38px; }
.symbol-progress i:nth-child(4) { height: 46px; background: #9db2f5; }

.interface-section { background: var(--page); }
.interface-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 20px; }
.interface-panel { min-width: 0; min-height: 690px; padding: clamp(28px, 3.3vw, 46px); position: relative; overflow: hidden; display: flex; flex-direction: column; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.panel-companion { grid-column: span 7; background: #fff3f3; }
.panel-todo { grid-column: span 5; background: #fff8ee; }
.panel-discover { min-height: 600px; grid-column: span 4; background: #eff9f8; }
.panel-messages { min-height: 600px; grid-column: span 5; background: #fff2f3; }
.panel-profile { min-height: 600px; grid-column: span 3; background: var(--blue-pale); }
.panel-copy { position: relative; z-index: 2; max-width: 490px; }
.panel-copy > span { display: block; margin-bottom: 10px; color: var(--blue); font-size: .75rem; font-weight: 760; }
.panel-copy h3 { margin-bottom: 10px; font-size: clamp(1.5rem, 2.3vw, 2.16rem); }
.panel-copy p { max-width: 470px; margin-bottom: 0; color: var(--text); font-size: .91rem; }
.product-shot { width: min(74%, 360px); margin: 38px auto -410px; overflow: hidden; border: 1px solid rgba(255, 255, 255, .9); border-radius: 30px; box-shadow: var(--shadow-screen); transform: rotate(-1.4deg); }
.product-shot img { width: 100%; height: auto; }
.panel-todo .product-shot { width: min(82%, 320px); transform: rotate(1.8deg); }
.panel-discover .product-shot { width: min(92%, 300px); margin-bottom: -370px; transform: rotate(-1deg); }
.panel-messages .product-shot { width: min(78%, 310px); margin-bottom: -370px; transform: rotate(1deg); }
.panel-profile .product-shot { width: min(100%, 270px); margin-bottom: -375px; transform: none; }

.trust-logic { background: var(--surface); }
.trust-layout .section-heading { max-width: 720px; }
.unlock-visual { display: grid; grid-template-columns: minmax(170px, .72fr) minmax(330px, 1.56fr) minmax(170px, .72fr); align-items: center; gap: clamp(24px, 4vw, 54px); }
.unlock-step { min-width: 0; text-align: center; }
.unlock-step > span { display: block; margin-bottom: 16px; color: var(--muted); font-size: .74rem; font-weight: 700; }
.unlock-step > p { margin: 17px 0 0; font-size: .88rem; font-weight: 680; }
.identity-orb { width: clamp(126px, 15vw, 184px); aspect-ratio: 1; margin-inline: auto; overflow: hidden; border-radius: 50%; border: 1px solid var(--line); background: url("review-avatar-2.png") center / cover no-repeat, var(--blue-pale); box-shadow: var(--shadow-soft); }
.identity-orb i { display: none; }
.unlock-muted .identity-orb { opacity: .4; filter: blur(4px) saturate(.45); }
.unlock-clear .identity-orb { border-color: rgba(49, 91, 232, .3); box-shadow: 0 22px 58px rgba(49, 91, 232, .16); }
.unlock-path { min-width: 0; text-align: center; }
.unlock-path > b { display: block; margin-bottom: 20px; font-size: 1.04rem; }
.unlock-path > div { position: relative; display: grid; grid-template-columns: repeat(7, 1fr); gap: clamp(7px, 1vw, 14px); }
.unlock-path > div::before { position: absolute; top: 50%; right: 3%; left: 3%; height: 2px; transform: translateY(-50%); background: #ced8f1; content: ""; }
.unlock-path i { aspect-ratio: 1; position: relative; border: 5px solid var(--surface); border-radius: 50%; background: var(--blue); box-shadow: 0 0 0 1px rgba(49, 91, 232, .2); }
.unlock-path i:nth-child(n+5) { background: #a9b9e9; }
.unlock-path > span { display: block; margin-top: 16px; color: var(--muted); font-size: .78rem; }
.boundary-facts { margin-top: 70px; padding-top: 24px; display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); }
.boundary-facts p { margin: 0; padding: 10px 28px; display: flex; flex-direction: column; border-inline-end: 1px solid var(--line); }
.boundary-facts p:first-child { padding-inline-start: 0; }
.boundary-facts p:last-child { padding-inline-end: 0; border-inline-end: 0; }
.boundary-facts b { margin-bottom: 5px; font-size: .82rem; }
.boundary-facts span { color: var(--text); font-size: .82rem; }

.reviews { background: var(--blue-pale); }
.review-editorial { display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(360px, .92fr); gap: 20px; }
.review-featured, .review-list article { border: 1px solid var(--line); background: var(--surface); }
.review-featured { min-height: 550px; padding: clamp(34px, 5vw, 64px); display: flex; flex-direction: column; justify-content: space-between; border-radius: var(--radius); }
.quote-mark { height: 68px; color: var(--blue); font-family: Georgia, serif; font-size: 5.8rem; line-height: 1; }
.review-featured blockquote { margin: auto 0 52px; }
.review-featured blockquote p { max-width: 680px; margin: 0; font-size: clamp(1.65rem, 3.1vw, 2.45rem); font-weight: 650; letter-spacing: -.036em; line-height: 1.42; }
.review-person { display: flex; align-items: center; gap: 14px; }
.review-person img { width: 54px; height: 54px; flex: 0 0 auto; border-radius: 50%; object-fit: cover; }
.review-person h3 { margin: 0 0 2px; font-size: .97rem; }
.review-person p { margin: 0; color: var(--muted); font-size: .72rem; }
.review-list { display: grid; gap: 20px; }
.review-list article { min-height: 170px; padding: 27px 30px; display: flex; flex-direction: column; justify-content: space-between; gap: 24px; border-radius: var(--radius); }
.review-list blockquote { margin: 0; }
.review-list blockquote p { margin: 0; color: var(--ink-soft); font-size: .93rem; line-height: 1.7; }
.review-list .review-person img { width: 44px; height: 44px; }
.review-list .review-person h3 { font-size: .84rem; }
.review-list .review-person p { font-size: .66rem; }

.official-facts { background: var(--page); }
.facts-layout, .faq-layout { display: grid; grid-template-columns: minmax(290px, .72fr) minmax(0, 1.28fr); align-items: start; gap: clamp(54px, 9vw, 126px); }
.facts-layout .section-heading, .faq-layout .section-heading { position: sticky; top: calc(var(--header-height) + 38px); margin-bottom: 0; }
.facts-table { margin: 0; border-top: 1px solid var(--line-strong); }
.facts-table div { min-height: 82px; display: grid; grid-template-columns: minmax(130px, .48fr) minmax(0, 1.52fr); align-items: center; gap: 24px; border-bottom: 1px solid var(--line); }
.facts-table dt { color: var(--muted); font-size: .78rem; font-weight: 650; }
.facts-table dd { margin: 0; color: var(--ink); font-size: 1rem; font-weight: 680; overflow-wrap: anywhere; }

.faq { background: var(--surface); }
.faq-list { border-top: 1px solid var(--line-strong); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { min-height: 80px; padding: 24px 54px 24px 0; position: relative; display: flex; align-items: center; color: var(--ink); font-size: 1.01rem; font-weight: 680; line-height: 1.45; cursor: pointer; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { position: absolute; right: 4px; top: 50%; width: 36px; height: 36px; display: grid; place-items: center; transform: translateY(-50%); border: 1px solid var(--line); border-radius: 50%; color: var(--blue); content: "+"; font-size: 1.25rem; font-weight: 450; transition: transform 180ms var(--ease-out), background 180ms var(--ease-out); }
.faq-list details[open] summary::after { transform: translateY(-50%) rotate(45deg); background: var(--blue-soft); }
.faq-list details > p { max-width: 700px; margin: -4px 54px 25px 0; color: var(--text); line-height: 1.78; }

.download-section { position: relative; padding: clamp(86px, 10vw, 128px) 0; overflow: hidden; background: var(--page-deep); }
.download-section::after { position: absolute; right: max(-50px, calc((100vw - var(--container)) / 2 - 90px)); bottom: -72px; width: 260px; aspect-ratio: 1; border-radius: 70px; background: url("bifrost-logo.png?v=20260818c") center / cover no-repeat; content: ""; opacity: .23; transform: rotate(9deg); }
.download-layout { min-height: 330px; padding: clamp(38px, 6vw, 70px); position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 48px; border: 1px solid rgba(49, 91, 232, .16); border-radius: var(--radius); background: var(--surface); box-shadow: var(--shadow-soft); }
.download-layout h2 { margin-bottom: 12px; }
.download-layout > div:first-child > p:last-child { margin: 0; color: var(--text); }
.download-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.download-actions .button { min-width: 196px; min-height: 74px; padding: 13px 20px; flex-direction: column; align-items: flex-start; }
.download-actions .button b { font-size: 1rem; }
.download-actions .button span { font-size: .68rem; font-weight: 560; opacity: .82; }

.site-footer { padding: 62px 0 24px; border-top: 1px solid var(--line); background: var(--page); }
.footer-main { display: grid; grid-template-columns: 1fr 1.7fr; gap: 70px; }
.footer-brand p { margin: 15px 0 0; color: var(--muted); font-size: .86rem; }
.footer-main nav { display: flex; flex-wrap: wrap; justify-content: flex-end; align-content: flex-start; gap: 12px 28px; color: var(--text); font-size: .84rem; }
.footer-main nav a { min-height: 44px; display: inline-flex; align-items: center; }
.footer-main nav a:hover, .footer-bottom a:hover { color: var(--blue); }
.footer-bottom { margin-top: 46px; padding-top: 20px; display: flex; justify-content: space-between; gap: 24px; border-top: 1px solid var(--line); color: var(--muted); font-size: .74rem; }

[data-reveal] { opacity: 1; transform: none; }
.motion-ready [data-reveal] { opacity: 0; transform: translateY(22px); transition: opacity 650ms var(--ease-out), transform 650ms var(--ease-out); }
.motion-ready [data-reveal].is-visible { opacity: 1; transform: translateY(0); }

@media (max-width: 1120px) {
  .hero-layout { grid-template-columns: minmax(0, 1.06fr) minmax(410px, .94fr); }
  .hero-screen-primary { left: 18%; width: 248px; }
  .hero-screen-secondary { width: 198px; }
  .hero-screen-tertiary { width: 182px; }
  .panel-profile { grid-column: span 4; }
  .panel-messages { grid-column: span 4; }
}

@media (max-width: 920px) {
  :root { --header-height: 68px; }
  .container, .nav-shell { width: min(calc(100% - 32px), var(--container)); }
  .menu-button { display: inline-flex; }
  .site-nav { position: fixed; inset: var(--header-height) 0 auto; height: calc(100dvh - var(--header-height)); padding: 26px 20px 34px; display: none; flex-direction: column; align-items: stretch; gap: 0; overflow-y: auto; color: var(--ink); background: rgba(245, 247, 252, .99); }
  .site-nav.is-open { display: flex; }
  .site-nav a { min-height: 58px; padding-inline: 2px; border-bottom: 1px solid var(--line); font-size: 1.02rem; }
  .site-nav .language-link { margin: 0; padding-inline-start: 2px; border-inline-start: 0; }
  .site-nav .nav-download { min-height: 52px; margin-top: 18px; justify-content: center; border-bottom: 0; color: #f9fbff; font-size: .94rem; }
  .hero { padding-top: 48px; }
  .hero-layout { min-height: auto; grid-template-columns: 1fr; gap: 34px; }
  .hero-copy { max-width: 760px; padding-top: 0; }
  .hero-product { width: min(720px, 100%); min-height: 660px; margin-inline: auto; }
  .hero-screen-primary { left: 31%; width: 286px; }
  .hero-screen-secondary { right: 2%; width: 220px; }
  .hero-screen-tertiary { top: 155px; left: 4%; width: 210px; }
  .journey-map { grid-template-columns: 1fr 1fr; gap: 42px 0; }
  .journey-map li:nth-child(2) { border-inline-end: 0; }
  .journey-map li:nth-child(3) { padding-inline-start: 0; }
  .interface-grid { grid-template-columns: 1fr 1fr; }
  .panel-companion, .panel-todo, .panel-discover, .panel-messages, .panel-profile { min-height: 640px; grid-column: span 1; }
  .panel-profile { grid-column: 1 / -1; }
  .panel-profile .product-shot { width: min(48%, 310px); }
  .unlock-visual { grid-template-columns: 1fr; gap: 36px; }
  .unlock-path { width: min(580px, 100%); margin-inline: auto; }
  .boundary-facts { grid-template-columns: 1fr; }
  .boundary-facts p, .boundary-facts p:first-child, .boundary-facts p:last-child { padding: 16px 0; border-inline-end: 0; border-bottom: 1px solid var(--line); }
  .boundary-facts p:last-child { border-bottom: 0; }
  .review-editorial { grid-template-columns: 1fr; }
  .review-featured { min-height: 450px; }
  .review-list { grid-template-columns: repeat(3, 1fr); }
  .review-list article { min-width: 0; }
  .facts-layout, .faq-layout { grid-template-columns: 1fr; gap: 36px; }
  .facts-layout .section-heading, .faq-layout .section-heading { position: static; }
  .download-layout { grid-template-columns: 1fr; }
  .download-actions { width: 100%; }
  .download-actions .button { min-width: 0; }
}

@media (max-width: 680px) {
  h1 { font-size: clamp(1.75rem, 8.5vw, 2.45rem); }
  h2 { font-size: clamp(2.05rem, 9.8vw, 2.8rem); }
  .section { padding: 82px 0; }
  .hero { padding-top: 34px; padding-bottom: 44px; }
  .hero-brandmark { width: 68px; height: 68px; margin-bottom: 24px; border-radius: 18px; }
  .hero-lead { font-size: 1rem; }
  .hero-actions { flex-direction: column; }
  .hero-actions .button { width: 100%; }
  .hero-product { min-height: 535px; }
  .hero-screen { border-radius: 24px; }
  .hero-screen-primary { left: 25%; width: min(235px, 59vw); }
  .hero-screen-secondary { top: 58px; right: -5%; width: min(182px, 46vw); }
  .hero-screen-tertiary { top: 132px; left: -4%; width: min(170px, 43vw); }
  .hero-product figcaption { right: 0; }
  .fact-rail dl { grid-template-columns: 1fr 1fr; }
  .fact-rail dl div, .fact-rail dl div:first-child, .fact-rail dl div:last-child { padding: 14px 12px; border-inline-end: 0; border-bottom: 1px solid var(--line); }
  .fact-rail dl div:nth-child(odd) { padding-inline-start: 0; border-inline-end: 1px solid var(--line); }
  .fact-rail dl div:nth-child(even) { padding-inline-end: 0; }
  .fact-rail dl div:nth-last-child(-n+2) { border-bottom: 0; }
  .global-grid { grid-template-columns: 1fr; }
  .global-card:nth-child(n) { min-height: 210px; grid-column: 1; }
  .journey-map { grid-template-columns: 1fr; gap: 0; }
  .journey-map li, .journey-map li:first-child, .journey-map li:last-child, .journey-map li:nth-child(3) { padding: 26px 0; display: grid; grid-template-columns: 76px 1fr; column-gap: 20px; border-inline-end: 0; border-top: 1px solid var(--line); }
  .journey-symbol { width: 70px; height: 70px; grid-row: 1 / span 2; margin: 0; }
  .journey-map h3 { align-self: end; margin-bottom: 4px; }
  .journey-map p { align-self: start; }
  .interface-grid { grid-template-columns: 1fr; }
  .panel-companion, .panel-todo, .panel-discover, .panel-messages, .panel-profile { min-height: 620px; grid-column: 1; padding: 28px 22px; }
  .product-shot, .panel-todo .product-shot, .panel-discover .product-shot, .panel-messages .product-shot, .panel-profile .product-shot { width: min(86%, 310px); margin-top: 34px; margin-bottom: -390px; }
  .review-featured { min-height: 400px; padding: 32px 26px; }
  .review-featured blockquote { margin-bottom: 40px; }
  .review-featured blockquote p { font-size: 1.5rem; }
  .review-list { grid-template-columns: 1fr; }
  .review-list article { min-height: 0; }
  .facts-table div { min-height: 76px; grid-template-columns: 110px 1fr; gap: 14px; }
  .faq-list summary { min-height: 76px; font-size: .95rem; }
  .download-layout { min-height: 0; padding: 32px 22px; }
  .download-actions { grid-template-columns: 1fr; }
  .download-actions .button { width: 100%; align-items: center; }
  .download-section::after { width: 190px; opacity: .16; }
  .footer-main { grid-template-columns: 1fr; gap: 38px; }
  .footer-main nav { display: grid; grid-template-columns: 1fr 1fr; justify-content: start; gap: 2px 20px; }
  .footer-bottom { flex-direction: column; gap: 6px; }
}

@media (max-width: 390px) {
  .hero-product { min-height: 495px; }
  .hero-screen-primary { left: 22%; }
  .hero-screen-secondary { right: -9%; }
  .hero-screen-tertiary { left: -8%; }
  .facts-table div { grid-template-columns: 1fr; gap: 3px; padding: 14px 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .motion-ready [data-reveal] { opacity: 1; transform: none; }
}

@media (forced-colors: active) {
  .button, .menu-button, .global-card, .interface-panel, .review-featured, .review-list article { border: 1px solid ButtonText; }
  .journey-symbol, .identity-orb { border: 2px solid CanvasText; }
}