:root {
  --background: #f8fbff;
  --surface: #ffffff;
  --surface-blue: #eff8ff;
  --surface-soft: #f7fbfe;
  --surface-strong: #eef6fb;
  --ink: #071d2e;
  --muted: #667789;
  --line: #dde7f0;
  --line-cool: #cce2f2;
  --primary: #0869a8;
  --primary-dark: #073e6c;
  --success: #0f7a55;
  --warning: #b26b00;
  --danger: #b42318;
  --demo-pro-surface: #041624;
  --demo-pro-soft: #0e2a40;
  --demo-pro-panel: rgba(234, 246, 253, 0.09);
  --demo-pro-border: rgba(143, 205, 242, 0.26);
  --demo-pro-accent: #5bc8f5;
  --demo-pro-accent-soft: #bdeeff;
  --demo-pro-text: #f8fcff;
  --demo-pro-muted: rgba(234, 246, 253, 0.72);
  --shadow: 0 24px 70px rgba(7, 29, 46, 0.16);
  --shadow-soft: 0 14px 34px rgba(7, 29, 46, 0.08);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 72px;
  padding: 12px clamp(16px, 4vw, 64px);
  border-bottom: 1px solid rgba(221, 231, 240, 0.9);
  background: rgba(248, 251, 255, 0.92);
  backdrop-filter: blur(18px);
}

.brand,
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 800;
  letter-spacing: 0;
}

.brand img,
.footer-brand img {
  width: 36px;
  height: 36px;
}

nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(12px, 2vw, 28px);
  color: var(--muted);
  font-size: 0.94rem;
  font-weight: 700;
}

nav a,
.footer-links a {
  min-height: 36px;
  display: inline-flex;
  align-items: center;
}

nav a:hover,
.footer-links a:hover {
  color: var(--primary);
}

nav a[aria-current="page"] {
  color: var(--ink);
}

.header-actions {
  width: auto;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 320px;
  justify-content: flex-end;
}

.language-switch {
  flex: 0 0 auto;
  width: 110px;
  display: inline-grid;
  grid-template-columns: 1fr 1fr;
  padding: 2px;
  border: 1px solid #cfe2ee;
  border-radius: 999px;
  background: #eef6fb;
  cursor: pointer;
  user-select: none;
}

.language-switch button {
  width: 100%;
  min-height: 32px;
  padding: 0 10px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: #426174;
  cursor: pointer;
  font: inherit;
  font-size: 0.75rem;
  font-weight: 900;
}

.language-switch button[aria-pressed="true"] {
  background: #ffffff;
  color: var(--primary-dark);
  box-shadow: 0 4px 12px rgba(7, 29, 46, 0.09);
}

.header-cta,
.button {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  font-weight: 800;
  letter-spacing: 0;
  text-align: center;
}

.header-cta {
  min-width: 194px;
  padding: 0 18px;
  background: var(--ink);
  color: #ffffff;
  white-space: nowrap;
}

.hero {
  width: min(520px, calc(100% - 32px));
  min-height: auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 4vw, 42px);
  align-items: center;
  justify-items: center;
  margin: 0 auto;
  padding: clamp(34px, 5vw, 76px) 0 clamp(34px, 4vw, 56px);
}

.hero-copy {
  min-width: 0;
  max-width: 720px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--primary);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 18px;
  font-size: clamp(3.15rem, 6.5vw, 5.75rem);
  line-height: 0.94;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 16px;
  font-size: clamp(2.1rem, 5vw, 4.4rem);
  line-height: 0.98;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 8px;
  font-size: 1.2rem;
  line-height: 1.18;
}

.hero-line {
  max-width: 660px;
  margin-bottom: 28px;
  color: #254156;
  font-size: clamp(1.08rem, 1.8vw, 1.34rem);
  font-weight: 650;
}

.hero-actions,
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.button {
  padding: 0 18px;
}

.button.primary {
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 12px 28px rgba(8, 105, 168, 0.22);
}

.button.secondary {
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
}

.button.disabled {
  cursor: default;
  background: #8aa9bd;
  box-shadow: none;
}

.trust-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.trust-row span {
  min-height: 34px;
  display: inline-flex;
  align-items: center;
  padding: 0 10px;
  border: 1px solid #cce2f2;
  border-radius: 999px;
  background: var(--surface-blue);
  color: var(--primary-dark);
  font-size: 0.88rem;
  font-weight: 800;
}

.demo-shell {
  min-width: 0;
  display: grid;
  gap: 14px;
  justify-items: center;
}

.demo-promise {
  width: min(460px, 100%);
  min-height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0;
  color: var(--ink);
  font-size: clamp(1.02rem, 2.7vw, 1.28rem);
  font-weight: 900;
  line-height: 1.18;
  text-align: center;
}

.demo-proof-line {
  width: min(430px, 100%);
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0;
  color: var(--primary-dark);
  font-size: 0.94rem;
  font-weight: 850;
  text-align: center;
}

.phone-demo {
  position: relative;
  width: min(360px, 100%);
  margin-inline: auto;
  aspect-ratio: 393 / 852;
  display: flex;
  padding: 12px;
  border: 9px solid var(--ink);
  border-radius: 38px;
  background: var(--ink);
  box-shadow: var(--shadow);
  cursor: default;
  transform-origin: top left;
}

.phone-demo-speaker {
  position: absolute;
  top: 12px;
  left: 50%;
  width: 82px;
  height: 6px;
  border-radius: 999px;
  background: #334f63;
  transform: translateX(-50%);
  z-index: 2;
}

.phone-demo-screen {
  flex: 1;
  height: 100%;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  overflow-anchor: none;
  padding: 16px;
  border-radius: 27px;
  background: #f6fafc;
  scrollbar-width: thin;
}

.demo-statusbar,
.draft-total-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.demo-statusbar {
  margin-bottom: 18px;
  color: #315064;
  font-size: 0.78rem;
  font-weight: 850;
}

.demo-app-top {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
}

.demo-app-title {
  min-width: 0;
  max-width: 100%;
}

.demo-top-actions {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
  justify-self: end;
}

.demo-language-switch {
  width: 88px;
}

.demo-language-switch button {
  min-height: 30px;
  padding: 0 8px;
  font-size: 0.68rem;
}

.demo-mini-label {
  display: block;
  color: var(--primary);
  font-size: 0.72rem;
  font-weight: 900;
  text-transform: uppercase;
}

.demo-app-top strong {
  display: block;
  font-size: 1.24rem;
}

.demo-expand-button {
  display: none;
  min-height: 36px;
  align-items: center;
  justify-content: center;
  padding: 0 11px;
  border: 1px solid var(--line-cool);
  border-radius: 999px;
  background: #ffffff;
  color: var(--primary-dark);
  font: inherit;
  font-size: 0.78rem;
  font-weight: 900;
  cursor: pointer;
}

.timmy-stage {
  display: grid;
  justify-items: center;
  gap: 7px;
  margin-bottom: 12px;
  padding: 14px 14px 13px;
  border: 1px solid var(--demo-pro-border);
  border-radius: 18px;
  background:
    radial-gradient(circle at 50% 14%, rgba(91, 200, 245, 0.26), transparent 42%),
    radial-gradient(circle at 50% 0%, rgba(189, 238, 255, 0.12), transparent 34%),
    linear-gradient(180deg, var(--demo-pro-panel), rgba(91, 200, 245, 0.02)),
    linear-gradient(180deg, var(--demo-pro-soft) 0%, var(--demo-pro-surface) 100%);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.08),
    0 14px 30px rgba(4, 22, 36, 0.18);
  text-align: center;
}

.timmy-trigger {
  width: 84px;
  height: 84px;
  display: grid;
  place-items: center;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
}

.timmy-sprite {
  position: relative;
  width: 64px;
  height: 64px;
  display: grid;
  place-items: center;
}

.timmy-aura,
.timmy-orbit,
.timmy-soft-ring,
.timmy-body {
  position: absolute;
}

.timmy-aura {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: rgba(91, 200, 245, 0.14);
  box-shadow: 0 0 18px rgba(91, 200, 245, 0.24);
  animation: timmy-breathe 4.6s ease-in-out infinite;
}

.timmy-orbit {
  width: 59px;
  height: 59px;
  border: 1px dashed rgba(91, 200, 245, 0.72);
  border-radius: 50%;
  animation: timmy-spin 9.2s linear infinite;
}

.timmy-soft-ring {
  width: 54px;
  height: 54px;
  border: 1px solid rgba(189, 238, 255, 0.5);
  border-radius: 50%;
}

.timmy-body {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  overflow: hidden;
  border: 2px solid #8bbde0;
  border-radius: 50%;
  background: #fbfeff;
  box-shadow: 0 8px 14px rgba(91, 200, 245, 0.18);
}

.timmy-sprite.is-thinking .timmy-body,
.timmy-sprite.is-thinking .timmy-orbit {
  border-color: var(--demo-pro-accent);
}

.timmy-sprite.is-thinking .timmy-aura {
  animation: timmy-pulse 3.1s ease-in-out infinite;
}

.timmy-sprite.is-ready .timmy-body,
.timmy-sprite.is-ready .timmy-orbit {
  border-color: var(--success);
}

.timmy-sprite.is-needs-info .timmy-body,
.timmy-sprite.is-needs-info .timmy-orbit {
  border-color: var(--warning);
}

.timmy-shine {
  position: absolute;
  top: 10px;
  left: 12px;
  width: 19px;
  height: 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.58);
}

.timmy-eyes {
  display: inline-flex;
  gap: 7px;
}

.timmy-eyes span {
  width: 7px;
  height: 15px;
  border-radius: 999px;
  background: var(--primary);
  animation: timmy-blink 5.4s ease-in-out infinite;
}

.timmy-sprite.is-thinking .timmy-eyes span {
  height: 18px;
}

.timmy-sprite.is-needs-info .timmy-eyes span {
  background: var(--warning);
}

.demo-state {
  margin-bottom: 0;
  color: var(--demo-pro-text);
  font-size: 1rem;
  font-weight: 900;
}

.demo-bubble {
  max-width: 270px;
  margin-bottom: 0;
  color: var(--demo-pro-muted);
  font-size: 0.86rem;
}

.demo-scenario-nav {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) 34px;
  gap: 8px;
  align-items: center;
  margin-bottom: 10px;
}

.demo-scenarios {
  display: flex;
  gap: 7px;
  overflow-x: auto;
  scrollbar-width: none;
}

.demo-scenarios::-webkit-scrollbar {
  display: none;
}

.demo-scenario-nav > button,
.demo-scenarios button {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: var(--radius-sm);
  font: inherit;
  font-size: 0.88rem;
  font-weight: 850;
  letter-spacing: 0;
  line-height: 1;
  cursor: pointer;
}

.demo-scenario-nav > button {
  border: 1px solid var(--line-cool);
  background: #ffffff;
  color: var(--primary-dark);
  font-size: 1.16rem;
}

.demo-scenarios button {
  flex: 0 0 auto;
  min-width: 92px;
  padding: 0 11px;
  border: 1px solid var(--line-cool);
  background: #ffffff;
  color: var(--primary-dark);
}

.demo-scenarios button:hover,
.demo-scenarios button.is-active {
  border-color: rgba(91, 200, 245, 0.72);
  background:
    linear-gradient(180deg, rgba(189, 238, 255, 0.44), rgba(239, 248, 255, 0.94));
  color: var(--primary-dark);
  box-shadow: inset 0 0 0 1px rgba(91, 200, 245, 0.18);
}

.demo-note-card,
.demo-thinking,
.demo-result {
  margin-bottom: 10px;
  padding: 12px;
  border: 1px solid #cde1ed;
  border-radius: 16px;
  background: #ffffff;
}

.demo-note-card span,
.demo-panel-label {
  display: block;
  margin-bottom: 5px;
  color: var(--primary);
  font-size: 0.68rem;
  font-weight: 900;
  text-transform: uppercase;
}

.demo-note-card p {
  margin-bottom: 0;
  color: #315064;
  font-size: 0.88rem;
  font-weight: 750;
  line-height: 1.32;
}

.demo-note-card p::after {
  content: "";
  display: none;
  width: 2px;
  height: 1em;
  margin-left: 2px;
  background: rgba(8, 105, 168, 0.45);
  vertical-align: -0.12em;
}

.demo-note-card.is-typing p::after {
  display: inline-block;
}

.demo-thinking {
  min-height: 142px;
}

.demo-thinking ol {
  display: grid;
  gap: 7px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.demo-thinking li {
  display: grid;
  grid-template-columns: 15px minmax(0, 1fr);
  gap: 8px;
  align-items: start;
  color: #6c7c8d;
  font-size: 0.8rem;
  font-weight: 760;
}

.demo-thinking li span {
  width: 11px;
  height: 11px;
  margin-top: 4px;
  border: 2px solid #c6ddea;
  border-radius: 50%;
}

.demo-thinking li p {
  margin-bottom: 0;
}

.demo-thinking li.is-active {
  color: var(--primary-dark);
}

.demo-thinking li.is-active span {
  border-color: #54d8e7;
  box-shadow: 0 0 0 5px rgba(84, 216, 231, 0.18);
}

.demo-thinking li.is-done {
  color: var(--ink);
}

.demo-thinking li.is-done span {
  border-color: var(--success);
  background: var(--success);
}

.timmy-trigger:focus-visible,
.demo-expand-button:focus-visible,
.language-switch button:focus-visible,
.demo-scenario-nav button:focus-visible {
  outline: 3px solid rgba(8, 105, 168, 0.24);
  outline-offset: 2px;
}

.demo-result {
  min-height: 250px;
  margin-bottom: 0;
  opacity: 0.72;
  transition: opacity 180ms ease, transform 180ms ease;
}

.demo-result.is-ready {
  opacity: 1;
  transform: translateY(-1px);
}

.result-placeholder {
  min-height: 178px;
  display: grid;
  place-items: center;
  padding: 18px;
  border: 1px dashed #cde1ed;
  border-radius: 12px;
  color: var(--muted);
  text-align: center;
  font-weight: 780;
}

.result-card {
  display: grid;
  gap: 8px;
}

.result-rows {
  display: grid;
  gap: 6px;
}

.result-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 7px 8px;
  border-radius: var(--radius-sm);
  background: var(--surface-blue);
  color: #315064;
  font-size: 0.78rem;
  font-weight: 780;
}

.result-row strong {
  color: var(--ink);
  white-space: nowrap;
}

.demo-result-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 7px;
}

.demo-result-actions span {
  min-height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: var(--primary);
  color: #ffffff;
  font-size: 0.76rem;
  font-weight: 900;
}

.demo-result-actions span + span {
  border: 1px solid var(--line-cool);
  background: #ffffff;
  color: var(--primary-dark);
}

@keyframes timmy-spin {
  to {
    transform: rotate(360deg);
  }
}

@keyframes timmy-breathe {
  50% {
    transform: scale(1.06);
    opacity: 0.76;
  }
}

@keyframes timmy-pulse {
  50% {
    transform: scale(1.18);
    opacity: 0.62;
  }
}

@keyframes timmy-blink {
  0%,
  92%,
  100% {
    transform: scaleY(1);
  }

  95% {
    transform: scaleY(0.14);
  }
}

@keyframes demo-backdrop-in {
  from {
    background: rgba(7, 29, 46, 0);
  }

  to {
    background: var(--ink);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .timmy-aura,
  .timmy-orbit,
  .timmy-eyes span {
    animation: none;
  }
}

.draft-kicker {
  margin-bottom: 5px;
  color: var(--primary);
  font-size: 0.76rem;
  font-weight: 900;
  text-transform: uppercase;
}

.draft-title {
  margin-bottom: 8px;
  font-size: 1.08rem;
  line-height: 1.15;
}

.draft-summary {
  margin-bottom: 12px;
  color: #315064;
  font-size: 0.9rem;
}

.draft-total-row {
  margin-bottom: 12px;
  padding: 10px 0;
  border-block: 1px solid var(--line);
  color: var(--ink);
  font-weight: 900;
}

.customer-message {
  margin-bottom: 12px;
  padding: 11px;
  border-left: 4px solid #c85532;
  border-radius: 8px;
  background: #fff4ef;
  color: #65301d;
  font-size: 0.9rem;
}

.phone-demo .customer-message {
  display: -webkit-box;
  overflow: hidden;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
}

.demo-note,
.install-card {
  display: flex;
  align-items: center;
  gap: 12px;
  width: min(430px, 100%);
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
  box-shadow: var(--shadow-soft);
}

.install-card img {
  width: 52px;
  height: 52px;
  border-radius: 12px;
}

.demo-note,
.install-card div {
  margin: 0;
}

.demo-note strong,
.install-card strong {
  display: block;
  color: var(--ink);
}

.demo-note span,
.install-card span {
  display: block;
  color: var(--muted);
  font-size: 0.94rem;
}

.audience-strip {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1px;
  width: min(1160px, calc(100% - 32px));
  margin: 0 auto;
  padding: 0 0 clamp(28px, 4vw, 46px);
  background: transparent;
}

.audience-strip span {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 1 auto;
  padding: 8px 13px;
  border: 1px solid #cce2f2;
  border-radius: 999px;
  background: var(--surface-blue);
  color: var(--primary-dark);
  font-size: 0.86rem;
  font-weight: 850;
}

.section,
.showcase,
.final-cta {
  width: min(1160px, calc(100% - 32px));
  margin: 0 auto;
}

.section {
  padding: clamp(64px, 9vw, 112px) 0;
}

.section-heading {
  max-width: 880px;
  margin-bottom: 30px;
}

.section-heading p:not(.eyebrow),
.bilingual-copy > p:not(.eyebrow),
.final-cta > div > p {
  max-width: 720px;
  color: var(--muted);
  font-size: 1.08rem;
}

.problem-grid,
.steps,
.benefit-list,
.feature-grid,
.cred-points {
  display: grid;
  gap: 14px;
}

.problem-grid,
.steps,
.feature-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.benefit-list {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.problem-grid article,
.steps article,
.benefit-list article,
.feature-grid article,
.cred-card,
.cred-points article,
.faq details {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
}

.problem-grid article,
.steps article,
.benefit-list article,
.feature-grid article,
.cred-card,
.cred-points article {
  padding: 22px;
}

.problem-grid p,
.steps p,
.benefit-list p,
.feature-grid p,
.cred-card p,
.cred-points span,
.faq p {
  margin-bottom: 0;
  color: var(--muted);
}

.steps span {
  width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  border-radius: 999px;
  background: var(--primary);
  color: #ffffff;
  font-weight: 900;
}

.showcase {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(16px, 3vw, 28px);
  padding: clamp(42px, 6vw, 76px) 0;
}

.showcase figure {
  margin: 0;
}

.showcase img {
  width: 100%;
  aspect-ratio: 390 / 844;
  object-fit: cover;
  object-position: top;
  border: 9px solid var(--ink);
  border-radius: 34px;
  background: var(--ink);
  box-shadow: 0 18px 42px rgba(7, 29, 46, 0.14);
}

.showcase figcaption {
  margin-top: 14px;
  color: var(--muted);
}

.showcase strong {
  display: block;
  color: var(--ink);
  font-size: 1.08rem;
}

.bilingual {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(280px, 0.62fr);
  gap: clamp(24px, 5vw, 70px);
  align-items: center;
  border-block: 1px solid var(--line);
}

.bilingual img {
  width: min(380px, 100%);
  justify-self: center;
  border: 9px solid var(--ink);
  border-radius: 34px;
  box-shadow: var(--shadow);
}

.zh {
  margin-top: 20px;
  padding: 16px 18px;
  border-left: 5px solid var(--success);
  border-radius: 10px;
  background: var(--surface-blue);
  color: var(--primary-dark) !important;
  font-size: 1.2rem !important;
  font-weight: 850;
}

.credibility {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(280px, 1fr);
  gap: 16px;
}

.cred-points {
  grid-template-columns: 1fr;
}

.cred-points strong {
  display: block;
  margin-bottom: 4px;
}

.faq-list {
  display: grid;
  gap: 12px;
}

.faq details {
  padding: 0 18px;
}

.faq summary {
  cursor: pointer;
  min-height: 62px;
  display: flex;
  align-items: center;
  color: var(--ink);
  font-size: 1.05rem;
  font-weight: 850;
}

.faq details p {
  padding: 0 0 20px;
}

.final-cta {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 0.7fr);
  gap: clamp(22px, 4vw, 54px);
  align-items: center;
  padding: clamp(64px, 9vw, 112px) 0;
}

@media (min-width: 941px) {
  .hero {
    min-height: min(840px, calc(100svh - 72px));
  }

  .problem {
    min-height: 640px;
  }

  .how {
    min-height: 648px;
  }

  .showcase {
    min-height: 1037px;
  }

  .benefits {
    min-height: 756px;
  }

  .bilingual {
    min-height: 1028px;
  }

  .features {
    min-height: 852px;
  }

  .credibility {
    min-height: 677px;
  }

  .faq {
    min-height: 968px;
  }

  .final-cta {
    min-height: 512px;
  }

  .problem-grid article {
    min-height: 149px;
  }

  .steps article {
    min-height: 225px;
  }

  .benefit-list article {
    min-height: 125px;
  }

  .feature-grid article {
    min-height: 173px;
  }

  .cred-card {
    min-height: 453px;
  }

  .cred-points article:nth-child(1),
  .cred-points article:nth-child(2) {
    min-height: 134px;
  }

  .cred-points article:nth-child(3) {
    min-height: 158px;
  }
}

.help-page {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: clamp(44px, 7vw, 84px) 0 clamp(64px, 9vw, 112px);
}

.help-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.52fr);
  gap: clamp(24px, 5vw, 64px);
  align-items: start;
  padding-bottom: clamp(34px, 6vw, 62px);
}

.help-hero h1 {
  max-width: 840px;
  margin-bottom: 18px;
  font-size: clamp(2.6rem, 7vw, 5.7rem);
  line-height: 0.94;
}

html[lang="zh-Hans"] .help-hero h1 {
  max-width: 720px;
  font-size: clamp(2.5rem, 6vw, 4.6rem);
  line-height: 1.04;
}

.help-hero p:not(.eyebrow),
.help-contact p {
  max-width: 760px;
  color: #254156;
  font-size: 1.08rem;
}

.help-status,
.help-contact {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
  box-shadow: var(--shadow-soft);
}

.help-status {
  display: grid;
  gap: 10px;
  padding: 18px;
}

.help-status strong {
  font-size: 1.08rem;
}

.help-status span {
  padding-top: 10px;
  border-top: 1px solid #e6eff5;
  color: var(--muted);
}

.help-topics {
  position: sticky;
  top: 72px;
  z-index: 10;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  margin-bottom: 34px;
  padding: 10px 0;
  background: rgba(244, 248, 252, 0.92);
  backdrop-filter: blur(16px);
}

.help-topics a {
  flex: 0 0 auto;
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  padding: 0 12px;
  border: 1px solid var(--line-cool);
  border-radius: 999px;
  background: var(--surface-blue);
  color: var(--primary-dark);
  font-size: 0.88rem;
  font-weight: 850;
}

.help-section {
  display: grid;
  grid-template-columns: minmax(220px, 0.34fr) minmax(0, 1fr);
  gap: clamp(18px, 4vw, 46px);
  padding: clamp(34px, 6vw, 64px) 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: 140px;
}

.help-section .section-heading {
  margin-bottom: 0;
}

.help-section h2,
.help-contact h2 {
  font-size: clamp(1.8rem, 4vw, 3.2rem);
  line-height: 1;
}

.help-list {
  display: grid;
  gap: 10px;
}

.help-list details {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
  box-shadow: 0 9px 22px rgba(7, 29, 46, 0.04);
}

.help-list summary {
  cursor: pointer;
  min-height: 58px;
  display: flex;
  align-items: center;
  padding: 0 18px;
  color: var(--ink);
  font-weight: 900;
}

.help-list p {
  margin-bottom: 0;
  padding: 0 18px 18px;
  color: var(--muted);
}

.help-list a {
  color: var(--primary);
  font-weight: 850;
}

.help-contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 0.36fr);
  gap: 20px;
  align-items: center;
  margin-top: clamp(34px, 6vw, 64px);
  padding: clamp(22px, 4vw, 36px);
}

.help-contact-actions {
  display: grid;
  gap: 10px;
}

.help-contact-actions .button {
  width: 100%;
}

.legal-page {
  width: min(900px, calc(100% - 32px));
  margin: 0 auto;
  padding: clamp(44px, 7vw, 84px) 0 clamp(64px, 9vw, 112px);
}

.legal-document {
  padding: clamp(24px, 5vw, 44px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow-soft);
}

.legal-document h1 {
  max-width: 760px;
  margin-bottom: 10px;
  font-size: clamp(2.7rem, 7vw, 5.1rem);
}

.legal-document h2 {
  margin-top: 34px;
  font-size: clamp(1.45rem, 3vw, 2rem);
  line-height: 1.1;
}

.legal-document p,
.legal-document li {
  color: #254156;
}

.legal-document ul {
  display: grid;
  gap: 8px;
  padding-left: 22px;
}

.legal-updated {
  color: var(--muted) !important;
  font-weight: 700;
}

.language-note {
  padding: 12px 14px;
  border: 1px solid var(--line-cool);
  border-radius: var(--radius-sm);
  background: var(--surface-blue);
  color: var(--primary-dark) !important;
  font-weight: 750;
}

.install-card {
  align-items: stretch;
  flex-direction: column;
}

.install-card img {
  width: 64px;
  height: 64px;
}

.install-card .button {
  width: 100%;
}

footer {
  display: grid;
  grid-template-columns: minmax(180px, 0.7fr) minmax(220px, 1fr) auto;
  gap: 20px;
  align-items: center;
  padding: 30px clamp(16px, 5vw, 64px);
  border-top: 1px solid var(--line);
  background: var(--ink);
  color: #ffffff;
}

footer .footer-brand {
  color: #ffffff;
}

footer p {
  margin: 0;
  color: rgba(255, 255, 255, 0.72);
}

.footer-links {
  justify-content: flex-end;
  color: rgba(255, 255, 255, 0.82);
  font-weight: 750;
}

@media (max-width: 940px) {
  .site-header {
    position: static;
    flex-wrap: wrap;
  }

  nav {
    order: 3;
    width: 100%;
    justify-content: flex-start;
    overflow-x: auto;
    padding-bottom: 4px;
  }

  .hero,
  .bilingual,
  .credibility,
  .help-hero,
  .help-section,
  .help-contact,
  .final-cta,
  footer {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 46px;
  }

  .demo-shell {
    order: -1;
  }

  .phone-demo {
    width: min(360px, 100%);
  }

  .phone-demo-screen {
    height: 100%;
  }

  .problem-grid,
  .steps,
  .benefit-list,
  .feature-grid,
  .showcase {
    grid-template-columns: 1fr;
  }

  .showcase {
    width: min(430px, calc(100% - 32px));
  }

  .help-topics {
    top: 0;
  }

  footer,
  .footer-links {
    justify-content: flex-start;
  }
}

@media (max-width: 560px) {
  .site-header {
    flex-wrap: nowrap;
    gap: 8px 10px;
    padding: 9px 14px;
  }

  .brand {
    gap: 8px;
  }

  .brand img {
    width: 30px;
    height: 30px;
  }

  .header-cta {
    width: 132px;
    min-width: 132px;
    min-height: 36px;
    padding-inline: 6px;
    font-size: 0;
  }

  .header-actions {
    width: 132px;
    min-width: 132px;
    flex: 0 0 132px;
  }

  .header-cta::after {
    content: "Coming soon";
    font-size: 0.74rem;
  }

  html[lang="zh-Hans"] .header-cta::after {
    content: "即将推出";
  }

  .site-header .language-switch {
    display: none;
  }

  .demo-language-switch {
    width: 83px;
  }

  .demo-language-switch button {
    min-height: 30px;
    padding: 0 8px;
    font-size: 0.7rem;
  }

  .brand span {
    font-size: 0.94rem;
  }

  nav {
    display: none;
  }

  .demo-nav-revealed .site-header {
    flex-wrap: wrap;
  }

  .demo-nav-revealed nav {
    order: 3;
    width: 100%;
    display: flex;
    justify-content: space-between;
    gap: 8px;
    padding-top: 4px;
    overflow-x: auto;
    scrollbar-width: none;
  }

  .demo-nav-revealed nav::-webkit-scrollbar {
    display: none;
  }

  .demo-nav-revealed nav a {
    min-height: 32px;
    flex: 0 0 auto;
    font-size: 0.78rem;
    white-space: nowrap;
  }

  .demo-nav-revealed nav a[href="/support"] {
    display: none;
  }

  .hero {
    width: min(100% - 28px, 1220px);
    gap: 18px;
    min-height: auto;
    padding-top: 16px;
    padding-bottom: 28px;
  }

  .hero-copy {
    order: 1;
    min-height: auto;
  }

  .hero-copy .eyebrow {
    min-height: auto;
    display: block;
    margin-bottom: 8px;
    line-height: 1.18;
  }

  h1 {
    font-size: clamp(2.1rem, 9.6vw, 2.55rem);
    line-height: 0.98;
    margin-bottom: 10px;
  }

  h2 {
    font-size: clamp(1.86rem, 8.4vw, 2.08rem);
    line-height: 1.03;
  }

  .hero-line {
    display: none;
  }

  .hero-actions {
    display: none;
  }

  .demo-shell {
    order: -1;
    gap: 7px;
  }

  .demo-proof-line {
    width: min(330px, 100%);
    font-size: 0.82rem;
    line-height: 1.25;
  }

  .phone-demo {
    width: min(330px, 100%);
    max-width: calc(100vw - 56px);
    padding: 9px;
    border-width: 7px;
    border-radius: 31px;
    cursor: zoom-in;
    will-change: transform, border-radius, box-shadow;
  }

  .phone-demo-screen {
    height: 100%;
    min-height: 0;
    padding: 12px;
    border-radius: 22px;
  }

  .phone-demo-speaker {
    top: 9px;
    width: 66px;
  }

  .demo-scenario-nav {
    grid-template-columns: 30px minmax(0, 1fr) 30px;
    gap: 6px;
  }

  .demo-scenarios {
    overflow: hidden;
  }

  .demo-scenarios button {
    display: none;
    width: 100%;
    min-width: 0;
    justify-content: center;
  }

  .demo-scenarios button.is-active {
    display: inline-flex;
  }

  .showcase img,
  .bilingual img {
    border-width: 6px;
    border-radius: 24px;
  }

  .section,
  .help-page,
  .final-cta {
    width: min(100% - 28px, 1160px);
  }

  .section {
    padding: 44px 0;
  }

  .section-heading {
    margin-bottom: 20px;
  }

  .section-heading p:not(.eyebrow),
  .bilingual-copy > p:not(.eyebrow),
  .final-cta > div > p {
    font-size: 1rem;
  }

  .eyebrow {
    margin-bottom: 9px;
    font-size: 0.72rem;
  }

  .audience-strip {
    width: min(100% - 28px, 1160px);
    gap: 6px;
    padding: 0 0 28px;
  }

  .audience-strip span {
    min-height: 34px;
    padding: 7px 11px;
    font-size: 0.78rem;
  }

  .section > .section-heading {
    min-height: auto;
  }

  .problem {
    min-height: auto;
  }

  .problem .section-heading {
    min-height: auto;
  }

  .how {
    min-height: auto;
  }

  .showcase {
    min-height: auto;
  }

  .benefits {
    min-height: auto;
  }

  .bilingual {
    min-height: auto;
  }

  .features {
    min-height: auto;
  }

  .credibility {
    min-height: auto;
  }

  .faq {
    min-height: auto;
  }

  .final-cta {
    min-height: auto;
  }

  .problem-grid article {
    min-height: auto;
  }

  .steps article {
    min-height: auto;
  }

  .benefit-list article,
  .feature-grid article {
    min-height: auto;
  }

  .cred-card {
    min-height: auto;
  }

  .cred-points article {
    min-height: auto;
  }

  .faq details[open] {
    min-height: auto;
  }

  .showcase {
    width: 100%;
    display: flex;
    gap: 14px;
    overflow-x: auto;
    scroll-padding-inline: max(18px, calc((100vw - 318px) / 2));
    scroll-snap-type: x mandatory;
    padding: 38px max(18px, calc((100vw - 318px) / 2)) 44px;
    scrollbar-width: none;
  }

  .showcase::-webkit-scrollbar {
    display: none;
  }

  .showcase figure {
    flex: 0 0 min(318px, calc(100vw - 56px));
    display: grid;
    gap: 10px;
    scroll-snap-align: center;
  }

  .showcase figcaption {
    margin-top: 0;
    padding: 0 2px;
    font-size: 0.95rem;
    line-height: 1.42;
  }

  .showcase strong {
    font-size: 1rem;
  }

  .help-page {
    padding-top: 34px;
  }

  .help-hero {
    gap: 18px;
    padding-bottom: 34px;
  }

  .help-hero h1 {
    font-size: clamp(2rem, 10vw, 2.75rem);
    line-height: 1;
  }

  .help-hero p:not(.eyebrow),
  .help-contact p {
    font-size: 1rem;
  }

  .help-status {
    padding: 14px;
  }

  .help-topics {
    margin-bottom: 18px;
  }

  .help-section {
    gap: 14px;
    padding: 36px 0;
    scroll-margin-top: 18px;
  }

  .help-section h2,
  .help-contact h2 {
    font-size: 2rem;
  }

  .help-list summary {
    min-height: 54px;
    padding-inline: 14px;
  }

  .help-list p {
    padding: 0 14px 16px;
  }

  .help-contact {
    padding: 18px;
  }

  .problem-grid,
  .steps,
  .benefit-list,
  .feature-grid,
  .cred-points,
  .faq-list {
    gap: 12px;
  }

  .problem-grid article,
  .steps article,
  .benefit-list article,
  .feature-grid article,
  .cred-card,
  .cred-points article {
    padding: 18px;
  }

  .steps span {
    width: 30px;
    height: 30px;
    margin-bottom: 14px;
  }

  .demo-statusbar {
    display: none;
  }

  .demo-app-top {
    margin-bottom: 10px;
  }

  .demo-app-top > div:first-child {
    min-width: 0;
  }

  .demo-app-top strong {
    font-size: 1.12rem;
    line-height: 1.12;
  }

  html[lang="zh-Hans"] .demo-app-top strong {
    font-size: 1.02rem;
  }

  .timmy-stage {
    gap: 5px;
    margin-bottom: 9px;
    padding: 10px;
  }

  .timmy-trigger {
    width: 62px;
    height: 62px;
  }

  .timmy-sprite,
  .timmy-aura {
    width: 52px;
    height: 52px;
  }

  .timmy-orbit {
    width: 49px;
    height: 49px;
  }

  .timmy-soft-ring {
    width: 46px;
    height: 46px;
  }

  .timmy-body {
    width: 39px;
    height: 39px;
  }

  .timmy-shine {
    top: 8px;
    left: 10px;
    width: 16px;
    height: 10px;
  }

  .timmy-eyes {
    gap: 6px;
  }

  .timmy-eyes span {
    width: 6px;
    height: 13px;
  }

  .demo-state {
    font-size: 0.92rem;
  }

  .demo-expand-button {
    display: none;
    min-height: 32px;
    padding: 0 9px;
    font-size: 0.72rem;
  }

  .demo-bubble,
  .draft-summary,
  .customer-message {
    font-size: 0.84rem;
  }

  .demo-bubble {
    display: -webkit-box;
    overflow: hidden;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
  }

  .demo-scenario-nav {
    grid-template-columns: 30px minmax(0, 1fr) 30px;
    gap: 6px;
    margin-bottom: 8px;
  }

  .demo-scenario-nav > button,
  .demo-scenarios button {
    min-height: 34px;
    font-size: 0.78rem;
  }

  .demo-scenarios button {
    min-width: 84px;
  }

  .demo-note-card,
  .demo-thinking,
  .demo-result {
    margin-bottom: 8px;
    padding: 10px;
    border-radius: 13px;
  }

  .demo-note-card p,
  .demo-thinking li {
    font-size: 0.76rem;
  }

  .demo-thinking {
    min-height: 129px;
  }

  .demo-result {
    min-height: 225px;
  }

  .draft-kicker,
  .draft-summary,
  .result-rows {
    margin-bottom: 7px;
  }

  .draft-title {
    margin-bottom: 6px;
  }

  .result-row,
  .demo-result-actions span {
    font-size: 0.72rem;
  }

  .demo-note,
  .install-card {
    border-radius: 10px;
  }

  .demo-note {
    display: none;
  }

  .demo-note span {
    font-size: 0.78rem;
  }

  .trust-row {
    gap: 6px;
    margin-top: 9px;
  }

  .trust-row span {
    min-height: 28px;
    font-size: 0.76rem;
  }

  .bilingual {
    gap: 24px;
    padding: 44px 0;
  }

  .bilingual img {
    width: min(318px, 100%);
  }

  .zh {
    margin-top: 16px;
    padding: 13px 14px;
    font-size: 1rem !important;
  }

  .credibility {
    gap: 12px;
  }

  .cred-card h2 {
    font-size: clamp(1.76rem, 7.8vw, 2rem);
  }

  .faq details {
    padding: 0 14px;
  }

  .faq summary {
    min-height: 56px;
    font-size: 0.98rem;
    line-height: 1.2;
  }

  .faq details p {
    padding-bottom: 16px;
    font-size: 0.95rem;
  }

  .final-cta {
    gap: 18px;
    padding: 44px 0;
  }

  .install-card {
    padding: 16px;
    gap: 12px;
  }

  .install-card img {
    width: 54px;
    height: 54px;
  }

  footer {
    gap: 14px;
    padding: 24px 18px;
  }

  footer .footer-brand img {
    width: 30px;
    height: 30px;
  }

  .footer-links {
    gap: 8px 14px;
  }

  .footer-links a {
    min-height: 30px;
    font-size: 0.86rem;
  }

  .demo-preview-open .demo-shell {
    position: fixed;
    inset: 0;
    z-index: 200;
    align-content: start;
    justify-items: stretch;
    padding: 0;
    background: var(--ink);
    animation: demo-backdrop-in 360ms cubic-bezier(0.2, 0.8, 0.2, 1);
  }

  .demo-preview-open,
  .demo-preview-animating {
    overflow: hidden;
  }

  .demo-preview-open .site-header {
    visibility: hidden;
  }

  .demo-preview-open .phone-demo {
    width: 100vw;
    max-width: none;
    height: 100svh;
    aspect-ratio: auto;
    padding: 0;
    border: 0;
    border-radius: 0;
    box-shadow: none;
    cursor: default;
  }

  .demo-preview-open .demo-proof-line {
    display: none;
  }

  .demo-preview-open .phone-demo-speaker {
    display: none;
  }

  .demo-preview-open .phone-demo-screen {
    height: 100svh;
    min-height: 0;
    padding: max(18px, env(safe-area-inset-top)) 16px max(18px, env(safe-area-inset-bottom));
    border-radius: 0;
  }

  .demo-preview-open .demo-app-top {
    position: static;
    margin: 0 0 14px;
    padding: 0;
    background: transparent;
  }

  .demo-preview-open .demo-expand-button {
    display: inline-flex;
    position: relative;
    z-index: 7;
    box-shadow: 0 8px 18px rgba(7, 29, 46, 0.08);
  }

  .demo-preview-open .demo-note {
    display: none;
  }
}