@font-face {
  font-family: Manrope;
  font-style: normal;
  font-weight: 400 800;
  font-display: swap;
  src: url("/assets/fonts/manrope-latin.woff2") format("woff2");
}
:root {
  --bg: #f6f7f9;
  --ink: #182139;
  --muted: #5b6476;
  --surface: #fff;
  --panel: #eceff5;
  --line: #dce1e9;
  --blue: #315edb;
  --blue-soft: #e7edff;
  --on-blue: #fff;
  --max: 1200px;
  --font: Manrope, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  color-scheme: light dark;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: 32px;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.65 var(--font);
  -webkit-font-smoothing: antialiased;
}
img {
  display: block;
  max-width: 100%;
  height: auto;
}
figure,
p {
  margin: 0;
}
a {
  color: var(--blue);
  text-underline-offset: 4px;
  text-decoration-thickness: 1px;
}
a:hover {
  text-decoration: none;
}
button {
  font: inherit;
  cursor: pointer;
}
a,
button,
summary {
  -webkit-tap-highlight-color: transparent;
}
a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 5px;
  border-radius: 4px;
}
h1,
h2,
h3 {
  margin: 0;
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.045em;
}
h1 {
  font-size: clamp(56px, 6.4vw, 86px);
  font-weight: 800;
  letter-spacing: -0.065em;
}
h2 {
  font-size: clamp(34px, 3.8vw, 50px);
}
h3 {
  font-size: 24px;
  letter-spacing: -0.035em;
}
.wrap {
  width: min(calc(100% - 80px), var(--max));
  margin-inline: auto;
}
.skip-link {
  position: fixed;
  z-index: 20;
  top: 16px;
  left: 16px;
  padding: 10px 18px;
  background: var(--ink);
  color: var(--bg);
  border-radius: 12px;
  transform: translateY(-160%);
}
.skip-link:focus {
  transform: translateY(0);
}
.site-nav {
  height: 80px;
  display: flex;
  align-items: center;
  gap: 36px;
  position: relative;
  border-bottom: 1px solid var(--line);
}
.mark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  text-decoration: none;
  font-size: 21px;
  font-weight: 800;
  letter-spacing: -0.05em;
  white-space: nowrap;
}
.mark img {
  width: 36px;
  height: 36px;
  border-radius: 9px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-left: auto;
}
.nav-links a {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  min-height: 44px;
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
  text-decoration: none;
  white-space: nowrap;
}
.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--blue);
}
.nav-links a.nav-store {
  color: var(--ink);
}
.nav-tools {
  display: flex;
  align-items: center;
  gap: 12px;
}
.language-link {
  font-size: 13px;
  display: flex;
  align-items: center;
  min-height: 44px;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
}
.menu-toggle {
  display: none;
  min-height: 44px;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--ink);
  padding: 0 14px;
  font-size: 13px;
  font-weight: 600;
}
.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 32px;
  padding: 54px 0 62px;
  min-height: 680px;
}
.hero-copy {
  padding-bottom: 20px;
  position: relative;
  z-index: 1;
}
.kicker {
  font-size: 11px;
  line-height: 1.5;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--blue);
  font-weight: 700;
  margin-bottom: 22px;
}
.hero h1 span {
  color: var(--blue);
}
.lede {
  color: var(--muted);
  font-size: 18px;
  line-height: 1.7;
  max-width: 440px;
  margin-top: 26px;
}
.actions {
  display: flex;
  gap: 28px;
  align-items: center;
  margin-top: 32px;
}
.store-badge {
  display: inline-block;
  flex-shrink: 0;
  transition: transform 0.2s;
}
.store-badge img {
  width: 150px;
  height: auto;
}
.store-badge:hover {
  transform: translateY(-2px);
}
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-height: 44px;
  color: var(--ink);
  text-decoration: none;
  font-size: 14px;
  font-weight: 650;
}
.text-link span {
  display: inline-block;
  font-size: 20px;
  transition: transform 0.2s;
}
.text-link:hover span {
  transform: translate(2px, -2px);
}
.hero-visual {
  position: relative;
  height: 562px;
  width: 100%;
  isolation: isolate;
}
.hero-orbit {
  position: absolute;
  width: 480px;
  height: 480px;
  max-width: 100%;
  border: 1px solid var(--line);
  border-radius: 50%;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  z-index: -1;
}
.hero-orbit:after {
  content: "";
  position: absolute;
  inset: 50px;
  border: 1px solid var(--line);
  border-radius: 50%;
}
.device {
  background: #101320;
  border: 6px solid #20283a;
  border-radius: 36px;
  overflow: hidden;
  box-shadow: 0 18px 44px rgba(13, 27, 62, 0.16);
}
.device img {
  width: 100%;
  height: auto;
}
.device-back {
  position: absolute;
  width: 216px;
  top: 28px;
  left: 8%;
  transform: rotate(-8deg);
}
.device-front {
  position: absolute;
  width: 240px;
  top: 12px;
  right: 7%;
  transform: rotate(6deg);
}
.visual-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  text-align: center;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.04em;
}
.facts {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  padding: 30px 0;
  border-block: 1px solid var(--line);
}
.facts p {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-left: 28px;
  border-left: 1px solid var(--line);
}
.facts p:first-child {
  border: 0;
  padding-left: 0;
}
.facts strong {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.04em;
  white-space: nowrap;
}
.facts span {
  font-size: 12px;
  color: var(--muted);
}
.section {
  padding: 112px 0;
}
.section-heading {
  display: flex;
  justify-content: space-between;
  gap: 32px;
  align-items: flex-end;
  margin-bottom: 44px;
}
.section-heading > p {
  color: var(--muted);
  font-size: 15px;
  max-width: 380px;
}
.skill-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: 60px;
}
.skill-row {
  display: flex;
  align-items: center;
  gap: 24px;
  border-top: 1px solid var(--line);
  padding: 26px 0;
  min-width: 0;
  color: var(--ink);
  text-decoration: none;
}
.skill-number {
  align-self: flex-start;
  padding-top: 4px;
  font-size: 12px;
  color: var(--blue);
  font-weight: 700;
}
.skill-row h3 {
  font-size: 21px;
  line-height: 1.3;
}
.skill-row p {
  font-size: 13px;
  color: var(--muted);
  margin-top: 5px;
}
.row-arrow {
  font-size: 24px;
  margin-left: auto;
  flex-shrink: 0;
  transition: transform 0.2s;
  color: var(--muted);
}
a.skill-row:hover h3 {
  color: var(--blue);
}
a.skill-row:hover .row-arrow {
  transform: translate(3px, -3px);
  color: var(--blue);
}
.skill-availability {
  font-size: 10px;
  margin-left: auto;
  flex-shrink: 0;
  color: var(--muted);
}
.fold-section {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 70px;
  padding: 60px;
  border-radius: 24px;
  background: var(--panel);
  align-items: center;
  scroll-margin-top: 24px;
}
.fold-copy > p:not(.kicker) {
  margin-top: 24px;
  color: var(--muted);
  max-width: 330px;
  font-size: 15px;
}
.fold-copy .text-link {
  margin-top: 20px;
}
.fold-demo {
  text-align: center;
  --unit: 70px;
}
.fold-stage {
  height: 280px;
  position: relative;
  perspective: 800px;
}
.fold-model {
  position: absolute;
  left: 50%;
  top: 50%;
  width: var(--unit);
  height: var(--unit);
  transform: translate(calc(-50% - var(--unit) / 2), -50%);
  transform-style: preserve-3d;
  transition: transform 0.85s cubic-bezier(0.22, 1, 0.36, 1);
}
.cube-face {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #3156ac;
  background: #d8e2fa;
  border: 1px solid #8da5d7;
  font-size: 24px;
  font-weight: 700;
  backface-visibility: hidden;
  transform-style: preserve-3d;
  transition:
    transform 0.85s cubic-bezier(0.22, 1, 0.36, 1),
    background 0.2s,
    color 0.2s;
}
.face-a {
  transform: translateX(calc(-1 * var(--unit)));
}
.face-b {
  transform: translateY(calc(-1 * var(--unit)));
}
.face-c {
  transform: translateZ(1px);
}
.face-d {
  transform: translateY(var(--unit));
}
.face-e {
  transform: translateX(var(--unit));
}
.face-f {
  transform: translateX(calc(2 * var(--unit)));
}
.cube-face.is-selected {
  background: #315edb;
  color: #fff;
  border-color: #234cac;
}
.cube-face.is-opposite {
  background: #9ab3f1;
  color: #142b68;
  border: 3px dashed #234cac;
}
.is-folded .fold-model {
  transform: translate(-50%, -50%) rotateX(-24deg) rotateY(-34deg) scale(1.5);
}
.is-folded .face-a {
  transform: rotateY(-90deg) translateZ(calc(var(--unit) / 2));
}
.is-folded .face-b {
  transform: rotateX(90deg) translateZ(calc(var(--unit) / 2));
}
.is-folded .face-c {
  transform: translateZ(calc(var(--unit) / 2));
}
.is-folded .face-d {
  transform: rotateX(-90deg) translateZ(calc(var(--unit) / 2));
}
.is-folded .face-e {
  transform: rotateY(90deg) translateZ(calc(var(--unit) / 2));
}
.is-folded .face-f {
  transform: rotateY(180deg) translateZ(calc(var(--unit) / 2));
}
.face-picker {
  display: flex;
  justify-content: center;
  gap: 7px;
}
.face-picker button {
  width: 44px;
  height: 44px;
  background: var(--surface);
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 12px;
  font-size: 13px;
  font-weight: 700;
}
.face-picker button[aria-pressed="true"] {
  background: var(--blue);
  color: var(--on-blue);
  border-color: var(--blue);
}
.face-picker button.is-opposite {
  border: 2px dashed var(--blue);
}
.fold-readout {
  margin: 16px 0 20px;
  min-height: 54px;
}
.fold-readout strong {
  display: block;
  font-size: 15px;
}
.fold-readout span {
  display: block;
  color: var(--muted);
  font-size: 11px;
  margin-top: 4px;
}
.btn {
  display: inline-flex;
  gap: 16px;
  align-items: center;
  justify-content: center;
  padding: 13px 22px;
  min-height: 50px;
  border: 1px solid transparent;
  border-radius: 12px;
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
  transition:
    transform 0.2s,
    background 0.2s;
}
.btn:hover {
  transform: translateY(-2px);
}
.btn-primary {
  background: var(--blue);
  color: var(--on-blue);
}
.btn-primary:hover {
  background: #244fc3;
  color: #fff;
}
.btn-ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--ink);
}
.fold-toggle {
  min-width: 172px;
}
.practice-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 24px;
}
.practice-card {
  position: relative;
  border-radius: 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  height: 730px;
  overflow: hidden;
  padding: 40px;
}
.practice-copy {
  position: relative;
  z-index: 1;
  max-width: 310px;
}
.practice-copy h3 {
  font-size: 30px;
  line-height: 1.15;
}
.practice-copy p {
  font-size: 14px;
  color: var(--muted);
  margin-top: 18px;
  max-width: 320px;
}
.feature-note {
  display: block;
  color: var(--blue);
  font-size: 11px;
  font-weight: 600;
  margin-top: 18px;
}
.practice-device {
  position: absolute;
  width: 250px;
  border-width: 5px;
  right: 36px;
  top: 264px;
  transform: rotate(-7deg);
}
.practice-progress {
  background: var(--blue-soft);
}
.practice-progress .practice-device {
  right: 26px;
  top: 245px;
  transform: rotate(7deg);
}
.privacy-section {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 50px;
  align-items: center;
  padding: 14px 0 10px;
}
.privacy-copy {
  max-width: 490px;
}
.privacy-copy > p {
  margin-top: 24px;
  color: var(--muted);
  font-size: 15px;
}
.privacy-copy .note {
  font-size: 12px;
  margin-top: 16px;
}
.privacy-copy .text-link {
  margin-top: 16px;
}
.spatial-study {
  width: 100%;
  border-radius: 24px;
  aspect-ratio: 1.25;
  object-fit: cover;
  object-position: 65% center;
}
.pricing-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.price-card {
  padding: 36px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--surface);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}
.price-card h3 {
  font-size: 22px;
}
.price-title {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}
.trial-note {
  font-size: 10px;
  font-weight: 650;
  color: var(--blue);
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 5px 9px;
  border-radius: 8px;
}
.price-pro {
  background: var(--blue-soft);
  border-color: #c1cff5;
}
.price {
  font-size: 42px;
  line-height: 1.2;
  font-weight: 750;
  letter-spacing: -0.05em;
  margin-top: 25px;
}
.price span {
  font-size: 15px;
  font-weight: 500;
  color: var(--muted);
  letter-spacing: 0;
}
.price-intro {
  color: var(--muted);
  font-size: 13px;
  margin-top: 8px;
}
.feature-list {
  list-style: none;
  padding: 0;
  margin: 28px 0 30px;
  width: 100%;
}
.feature-list li {
  font-size: 13px;
  padding: 8px 0 8px 22px;
  position: relative;
}
.feature-list li:before {
  content: "✓";
  color: var(--blue);
  font-weight: 700;
  position: absolute;
  left: 0;
}
.price-card .btn {
  margin-top: auto;
}
.pricing-note {
  max-width: 800px;
  margin: 18px auto 0;
  font-size: 11px;
  text-align: center;
  color: var(--muted);
}
.faq-section {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 70px;
  padding: 0 0 100px;
}
.faq-section h2 {
  font-size: 38px;
}
.faq-list {
  border-top: 1px solid var(--line);
}
details {
  border-bottom: 1px solid var(--line);
  padding: 0;
}
summary {
  padding: 22px 30px 22px 0;
  position: relative;
  list-style: none;
  cursor: pointer;
  font-size: 14px;
  font-weight: 650;
  min-height: 64px;
}
summary::-webkit-details-marker {
  display: none;
}
summary:after {
  content: "+";
  position: absolute;
  right: 2px;
  top: 18px;
  font-size: 22px;
  color: var(--blue);
}
details[open] summary:after {
  content: "−";
}
details p {
  padding: 0 28px 24px 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.8;
}
.final-cta {
  padding: 76px 24px 80px;
  display: flex;
  align-items: center;
  flex-direction: column;
  text-align: center;
  background: var(--panel);
  border-radius: 24px;
  margin-bottom: 70px;
}
.final-cta > img {
  border-radius: 18px;
  margin-bottom: 24px;
  width: 72px;
  height: 72px;
}
.final-cta h2 {
  font-size: clamp(40px, 4.4vw, 58px);
}
.final-cta p {
  color: var(--muted);
  font-size: 14px;
  margin: 22px 0 28px;
}
.download-note {
  font-size: 11px;
  color: var(--muted);
  margin-top: 16px;
}
footer {
  border-top: 1px solid var(--line);
  padding: 28px 0 36px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 28px;
  color: var(--muted);
  font-size: 11px;
}
footer p {
  margin-top: 8px;
}
.footer-mark {
  font-size: 19px;
  letter-spacing: -0.045em;
  font-weight: 800;
  color: var(--ink);
  text-decoration: none;
}
footer nav {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}
footer nav a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--muted);
  text-decoration: none;
  font-size: 12px;
}
.page-hero {
  padding: 76px 0 48px;
}
.page-hero h1 {
  font-size: clamp(42px, 6vw, 70px);
  max-width: 16ch;
}
.page-hero .lede {
  max-width: 680px;
}
.prose {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  padding-bottom: 90px;
}
.prose h2 {
  font-size: 30px;
  margin-bottom: 20px;
}
.prose p,
.prose li {
  color: var(--muted);
  font-size: 15px;
  margin-bottom: 18px;
}
.worked {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 32px;
}
.steps {
  margin: 0;
  padding-left: 20px;
}
.iso {
  width: 100%;
  height: 150px;
}
.legal {
  max-width: 800px;
  padding: 72px 0 90px;
}
.legal h1 {
  font-size: clamp(42px, 6vw, 64px);
  margin-bottom: 28px;
}
.legal h2 {
  font-size: 24px;
  line-height: 1.3;
  margin: 34px 0 14px;
}
.legal p,
.legal li {
  color: var(--muted);
  margin-bottom: 18px;
  font-size: 15px;
}
.legal table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 13px;
}
.legal th,
.legal td {
  border: 1px solid var(--line);
  padding: 14px;
  text-align: left;
  vertical-align: top;
}
.legal th {
  background: var(--panel);
}
.zh {
  margin-top: 46px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}
html[lang="zh-Hans"] h1 {
  font-size: clamp(52px, 6vw, 78px);
  letter-spacing: -0.05em;
  line-height: 1.18;
}
html[lang="zh-Hans"] h2 {
  letter-spacing: -0.03em;
  line-height: 1.25;
}
html[lang="zh-Hans"] .kicker {
  letter-spacing: 0.1em;
}
html[lang="zh-Hans"] .hero .lede {
  max-width: 390px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e121f;
    --ink: #eff2fa;
    --muted: #a2aec5;
    --surface: #161d2e;
    --panel: #1b2438;
    --line: #303c53;
    --blue: #8caeff;
    --blue-soft: #192944;
    --on-blue: #101b32;
  }
  .hero-orbit {
    border-color: #293957;
  }
  .hero-orbit:after {
    border-color: #253149;
  }
  .device {
    border-color: #4a5365;
    box-shadow: 0 18px 44px rgba(0, 0, 0, 0.35);
  }
  .btn-primary:hover {
    background: #b3c9ff;
    color: #101b32;
  }
  .price-pro {
    border-color: #3b5180;
  }
  .spatial-study {
    border: 1px solid var(--line);
  }
}
@media (min-width: 1440px) {
  .hero {
    gap: 64px;
  }
  .device-back {
    left: 10%;
  }
  .device-front {
    right: 5%;
  }
}
@media (max-width: 1150px) {
  .site-nav {
    gap: 24px;
  }
  .nav-links {
    gap: 16px;
  }
  .facts p {
    flex-direction: column;
    gap: 2px;
    padding-left: 20px;
  }
  .hero {
    min-height: 630px;
  }
  .hero-visual {
    height: 520px;
  }
  .device-back {
    width: 190px;
    left: 4%;
    top: 38px;
  }
  .device-front {
    width: 214px;
    right: 3%;
  }
  .hero-orbit {
    width: 390px;
    height: 390px;
  }
  .fold-section {
    padding: 44px;
    gap: 36px;
  }
  .practice-card {
    padding: 32px;
  }
  .trial-note {
    font-size: 9px;
  }
}
@media (max-width: 1050px) {
  .site-nav .nav-links {
    position: absolute;
    z-index: 10;
    top: 72px;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 20px;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 16px;
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.08);
  }
  .site-nav .nav-links.is-open {
    display: flex;
  }
  .site-nav .nav-links a {
    font-size: 14px;
    min-height: 48px;
    border-bottom: 1px solid var(--line);
  }
  .site-nav .nav-links a:last-child {
    border: 0;
  }
  .site-nav .nav-tools {
    margin-left: auto;
  }
  .site-nav .menu-toggle {
    display: inline-flex;
    align-items: center;
  }
  .hero {
    gap: 22px;
  }
  .hero h1 {
    font-size: 66px;
  }
  .hero .lede {
    font-size: 16px;
  }
  .hero-visual {
    height: 488px;
  }
  .device-back {
    width: 172px;
    left: 0;
    top: 30px;
  }
  .device-front {
    width: 198px;
    right: 0;
  }
  .visual-caption {
    font-size: 11px;
  }
  .skill-list {
    column-gap: 36px;
  }
  .skill-row {
    gap: 16px;
  }
  .skill-row h3 {
    font-size: 18px;
  }
  .skill-row p {
    font-size: 12px;
  }
  .skill-availability {
    display: none;
  }
  .practice-grid {
    grid-template-columns: 1fr 1fr;
  }
  .practice-card {
    height: 690px;
    padding: 28px;
  }
  .practice-copy h3 {
    font-size: 26px;
  }
  .practice-device {
    width: 222px;
    right: 28px;
    top: 280px;
  }
  .practice-progress .practice-device {
    right: 22px;
    top: 258px;
  }
  .section-heading > p {
    font-size: 14px;
    max-width: 320px;
  }
  .privacy-section {
    gap: 36px;
  }
  .price-card {
    padding: 28px;
  }
  .faq-section {
    gap: 44px;
  }
  .fold-copy h2 {
    font-size: 36px;
  }
}
@media (max-width: 800px) {
  .wrap {
    width: calc(100% - 48px);
  }
  .hero {
    grid-template-columns: 1fr;
    gap: 18px;
    text-align: center;
    padding: 48px 0 38px;
    min-height: 0;
  }
  .hero-copy {
    padding: 0;
  }
  .hero h1 {
    font-size: 72px;
  }
  .hero .lede {
    margin: 24px auto 0;
    max-width: 400px;
  }
  .actions {
    justify-content: center;
    margin-top: 28px;
  }
  .hero-visual {
    height: 520px;
    max-width: 510px;
    margin: 12px auto 0;
  }
  .device-back {
    width: 202px;
    left: 12%;
    top: 25px;
  }
  .device-front {
    width: 228px;
    right: 10%;
  }
  .hero-orbit {
    width: 430px;
    height: 430px;
  }
  .section {
    padding: 80px 0;
  }
  .section-heading {
    align-items: flex-start;
    gap: 22px;
  }
  .section-heading h2 {
    font-size: 36px;
  }
  .section-heading > p {
    max-width: 280px;
    font-size: 13px;
  }
  .section-heading > p br {
    display: none;
  }
  .skill-list {
    column-gap: 28px;
  }
  .skill-row {
    padding: 24px 0;
    gap: 12px;
  }
  .skill-row h3 {
    font-size: 17px;
  }
  .skill-row p {
    font-size: 12px;
  }
  .fold-section {
    grid-template-columns: 1fr;
    padding: 36px;
    gap: 18px;
  }
  .fold-copy {
    max-width: 480px;
  }
  .fold-copy > p:not(.kicker) {
    max-width: 480px;
  }
  .fold-copy h2 {
    font-size: 40px;
  }
  .fold-stage {
    height: 270px;
  }
  .practice-grid {
    gap: 18px;
  }
  .practice-card {
    padding: 26px;
    height: 540px;
  }
  .practice-copy h3 {
    font-size: 24px;
  }
  .practice-copy p {
    font-size: 13px;
  }
  .feature-note {
    font-size: 10px;
  }
  .practice-device {
    right: 10px;
    top: 288px;
    width: 210px;
  }
  .practice-progress .practice-device {
    right: 12px;
    top: 280px;
  }
  .privacy-section {
    gap: 28px;
  }
  .privacy-section h2 {
    font-size: 34px;
  }
  .privacy-copy > p {
    font-size: 13px;
  }
  .spatial-study {
    aspect-ratio: 0.88;
  }
  .price-card {
    padding: 26px;
  }
  .price-card .btn {
    font-size: 11px;
    padding: 12px 14px;
    gap: 10px;
  }
  .feature-list li {
    font-size: 12px;
  }
  .price {
    font-size: 36px;
  }
  .faq-section {
    grid-template-columns: 1fr;
    gap: 32px;
    padding-bottom: 72px;
  }
  .faq-section h2 {
    font-size: 36px;
  }
  .final-cta {
    margin-bottom: 50px;
  }
  footer {
    align-items: flex-start;
    gap: 20px;
  }
  footer nav {
    justify-content: flex-end;
    gap: 18px;
  }
  .prose {
    grid-template-columns: 1fr;
    gap: 28px;
  }
}
@media (max-width: 560px) {
  .wrap {
    width: calc(100% - 40px);
  }
  .site-nav {
    height: 72px;
    gap: 12px;
  }
  .mark {
    font-size: 20px;
  }
  .mark img {
    width: 32px;
    height: 32px;
    border-radius: 8px;
  }
  .nav-tools {
    gap: 14px;
  }
  .hero {
    padding-top: 38px;
  }
  .kicker {
    font-size: 10px;
    margin-bottom: 18px;
  }
  .hero h1 {
    font-size: 57px;
  }
  .hero .lede {
    font-size: 15px;
    max-width: 340px;
    margin-top: 20px;
  }
  .actions {
    gap: 24px;
    margin-top: 26px;
  }
  .store-badge img {
    width: 138px;
  }
  .text-link {
    font-size: 13px;
    gap: 8px;
  }
  .hero-visual {
    height: 440px;
    margin-top: 12px;
    max-width: 350px;
  }
  .device-back {
    width: 158px;
    left: 3%;
    top: 35px;
    border-radius: 27px;
    border-width: 4px;
  }
  .device-front {
    width: 180px;
    right: 4%;
    top: 20px;
    border-radius: 29px;
    border-width: 4px;
  }
  .hero-orbit {
    width: 330px;
    height: 330px;
  }
  .hero-orbit:after {
    inset: 40px;
  }
  .visual-caption {
    bottom: 0;
    font-size: 10px;
  }
  .facts {
    grid-template-columns: 1fr 1fr;
    gap: 24px 0;
    padding: 25px 0;
  }
  .facts p {
    padding-left: 20px;
    gap: 0;
  }
  .facts p:nth-child(3) {
    padding-left: 0;
    border: 0;
  }
  .facts strong {
    font-size: 21px;
  }
  .facts span {
    font-size: 11px;
  }
  .section {
    padding: 66px 0;
  }
  .section-heading {
    display: block;
    margin-bottom: 30px;
  }
  .section-heading h2 {
    font-size: 34px;
  }
  .section-heading > p {
    margin-top: 22px;
    max-width: 320px;
    font-size: 14px;
  }
  .skill-list {
    grid-template-columns: 1fr;
  }
  .skill-row {
    gap: 18px;
    padding: 22px 0;
  }
  .skill-row h3 {
    font-size: 20px;
  }
  .skill-row p {
    font-size: 13px;
  }
  .skill-availability {
    display: inline;
    font-size: 9px;
  }
  .fold-section {
    padding: 28px 22px;
    border-radius: 24px;
    gap: 0;
  }
  .fold-copy h2 {
    font-size: 32px;
  }
  .fold-copy > p:not(.kicker) {
    font-size: 14px;
    margin-top: 20px;
  }
  .fold-copy .text-link {
    font-size: 12px;
    margin-top: 12px;
  }
  .fold-demo {
    --unit: 58px;
  }
  .fold-stage {
    height: 255px;
  }
  .cube-face {
    font-size: 21px;
  }
  .face-picker {
    gap: 4px;
  }
  .face-picker button {
    width: 40px;
    height: 44px;
    border-radius: 10px;
  }
  .fold-readout span {
    font-size: 10px;
  }
  .fold-toggle {
    font-size: 12px;
  }
  .practice-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .practice-card {
    height: 720px;
    padding: 30px;
  }
  .practice-copy {
    max-width: 300px;
  }
  .practice-copy h3 {
    font-size: 29px;
  }
  .practice-copy p {
    font-size: 14px;
  }
  .feature-note {
    font-size: 11px;
  }
  .practice-device {
    width: 238px;
    top: 263px;
    right: 30px;
  }
  .practice-progress .practice-device {
    top: 250px;
    right: 30px;
    width: 238px;
  }
  .privacy-section {
    grid-template-columns: 1fr;
    gap: 30px;
    padding: 0;
  }
  .privacy-section h2 {
    font-size: 34px;
  }
  .privacy-copy > p {
    font-size: 14px;
  }
  .spatial-study {
    aspect-ratio: 1.3;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
    gap: 18px;
  }
  .price-card {
    padding: 30px;
  }
  .price-card .btn {
    font-size: 12px;
    padding: 13px 18px;
  }
  .price-card h3 {
    font-size: 22px;
  }
  .price {
    font-size: 42px;
  }
  .feature-list li {
    font-size: 13px;
  }
  .trial-note {
    font-size: 9px;
  }
  .pricing-note {
    text-align: left;
    font-size: 10px;
  }
  .faq-section {
    padding-bottom: 60px;
  }
  .faq-section h2 {
    font-size: 32px;
  }
  summary {
    font-size: 13px;
    padding-right: 28px;
  }
  details p {
    font-size: 12px;
  }
  .final-cta {
    padding: 50px 20px;
    margin-bottom: 36px;
  }
  .final-cta h2 {
    font-size: 40px;
  }
  .final-cta p {
    font-size: 12px;
    max-width: 250px;
  }
  .final-cta > img {
    width: 64px;
    height: 64px;
    border-radius: 16px;
  }
  footer {
    display: block;
    padding: 24px 0;
  }
  footer nav {
    justify-content: flex-start;
    gap: 22px;
    margin-top: 16px;
  }
  .page-hero {
    padding: 48px 0 32px;
  }
  .page-hero h1 {
    font-size: 44px;
  }
  .page-hero .lede {
    font-size: 16px;
  }
  .prose {
    padding-bottom: 56px;
  }
  .prose p,
  .prose li {
    font-size: 14px;
  }
  .worked {
    padding: 24px;
  }
  .legal {
    padding: 48px 0 60px;
  }
  .legal h1 {
    font-size: 42px;
  }
  .legal h2 {
    font-size: 23px;
  }
  .legal p,
  .legal li {
    font-size: 14px;
  }
  .legal th,
  .legal td {
    padding: 10px;
    font-size: 12px;
  }
  html[lang="zh-Hans"] .hero h1 {
    font-size: 55px;
  }
  html[lang="zh-Hans"] .hero .lede {
    font-size: 15px;
    max-width: 300px;
  }
  html[lang="zh-Hans"] h2 {
    font-size: 32px;
  }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
  .store-badge:hover,
  .btn:hover {
    transform: none;
  }
}

@media (min-width: 801px) and (max-width: 1050px) {
  .hero h1 {
    font-size: clamp(50px, 6vw, 62px);
  }
}
@media (max-width: 360px) {
  .hero h1 {
    font-size: 46px;
  }
  .hero-visual {
    height: 385px;
  }
  .device-back {
    width: 140px;
    left: 1%;
    top: 30px;
  }
  .device-front {
    width: 155px;
    right: 1%;
  }
  .hero-orbit {
    width: 275px;
    height: 275px;
  }
  .actions {
    gap: 18px;
  }
  .fold-section {
    padding: 25px 14px;
  }
  .fold-demo {
    --unit: 52px;
  }
  .fold-copy h2 {
    font-size: 29px;
  }
  .face-picker {
    gap: 2px;
  }
  .face-picker button {
    width: 37px;
  }
  .fold-readout span {
    font-size: 9px;
  }
  .practice-card {
    padding: 25px;
    height: 680px;
  }
  .practice-copy h3 {
    font-size: 26px;
  }
  .practice-device,
  .practice-progress .practice-device {
    width: 210px;
    right: 20px;
    top: 270px;
  }
  .price-card {
    padding: 25px;
  }
  .price-card .btn {
    font-size: 11px;
    padding-inline: 14px;
  }
  html[lang="zh-Hans"] .hero h1 {
    font-size: 47px;
  }
}