:root {
  color-scheme: light;
  --bg: #f6faf9;
  --paper: #ffffff;
  --panel: #ffffff;
  --panel-soft: #edf8f6;
  --ink: #102936;
  --ink-strong: #071f29;
  --muted: #526a70;
  --muted-2: #71868b;
  --line: #d5e4e3;
  --line-strong: #a9c9c6;
  --line-warning: #dfc995;
  --brand: #0a5f63;
  --brand-strong: #073f45;
  --brand-deep: #071f29;
  --brand-accent: #31c4ca;
  --brand-accent-soft: #ddf6f2;
  --brand-link: #087076;
  --success: #16845f;
  --warning: #906123;
  --warning-soft: #fff7e8;
  --danger: #9b2f43;
  --focus-ring: rgba(49, 196, 202, 0.34);
  --shadow: 0 18px 44px rgba(7, 31, 41, 0.1);
  --radius: 8px;
  --container: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--bg);
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  letter-spacing: 0;
  overflow-x: hidden;
}

a {
  color: inherit;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid rgba(213, 228, 227, 0.9);
  background: rgba(246, 250, 249, 0.94);
  backdrop-filter: blur(14px);
}

.header-inner {
  width: min(var(--container), calc(100% - 40px));
  min-height: 70px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--brand);
  font-size: 1.02rem;
  font-weight: 850;
  text-decoration: none;
  white-space: nowrap;
}

.brand-mark {
  width: 38px;
  height: 38px;
  border-radius: var(--radius);
  flex: 0 0 auto;
  object-fit: cover;
  box-shadow: 0 6px 18px rgba(7, 31, 41, 0.18);
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: clamp(14px, 3vw, 30px);
  color: var(--ink);
  font-size: 0.92rem;
  font-weight: 720;
}

.site-nav a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  border-bottom: 2px solid transparent;
}

.site-nav a:hover,
.footer-links a:hover,
.text-link:hover {
  color: var(--brand-link);
}

.site-nav a:hover {
  border-bottom-color: var(--brand-accent);
}

.container {
  width: min(var(--container), calc(100% - 40px));
  margin: 0 auto;
}

.hero {
  padding: clamp(34px, 6vw, 66px) 0 34px;
  background:
    linear-gradient(180deg, rgba(221, 246, 242, 0.42), rgba(246, 250, 249, 0) 44%),
    var(--bg);
}

.hero-grid {
  min-width: 0;
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(330px, 0.82fr);
  align-items: center;
  gap: clamp(22px, 5vw, 58px) clamp(34px, 7vw, 82px);
}

.hero-copy {
  grid-column: 1;
  grid-row: 1;
  min-width: 0;
  width: 100%;
  max-width: 620px;
  padding-bottom: 104px;
}

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

h1 {
  margin-bottom: 6px;
  color: var(--ink-strong);
  font-size: 5.35rem;
  line-height: 0.98;
  font-weight: 880;
  letter-spacing: 0;
}

h1 {
  color: var(--brand);
}

.hero-subtitle {
  margin-bottom: 18px;
  color: var(--ink-strong);
  font-size: 4.25rem;
  line-height: 0.98;
  font-weight: 880;
  letter-spacing: 0;
}

.hero-lede {
  width: 100%;
  max-width: 560px;
  margin-bottom: 16px;
  color: var(--ink);
  font-size: 1.2rem;
  line-height: 1.8;
  overflow-wrap: anywhere;
}

.scope-note {
  width: 100%;
  max-width: 560px;
  margin-bottom: 28px;
  color: var(--muted);
  font-size: 0.98rem;
  overflow-wrap: anywhere;
}

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

.button {
  min-height: 48px;
  border-radius: var(--radius);
  padding: 12px 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--brand);
  color: #fff;
  background: var(--brand);
  font-weight: 820;
  line-height: 1.2;
  text-decoration: none;
  text-align: center;
  overflow-wrap: anywhere;
}

.button:hover {
  border-color: var(--brand-strong);
  background: var(--brand-strong);
}

.button.secondary {
  color: var(--brand);
  border-color: var(--line-strong);
  background: var(--paper);
}

.button.secondary:hover {
  color: var(--brand-strong);
  border-color: var(--brand-accent);
  background: var(--brand-accent-soft);
}

.button:focus-visible,
.site-nav a:focus-visible,
.footer-links a:focus-visible,
.text-link:focus-visible,
.email-link:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 3px;
}

.hero-next {
  grid-column: 1 / 2;
  grid-row: 1;
  align-self: end;
  margin-top: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.hero-next div {
  min-height: 72px;
  padding: 14px 16px;
  display: grid;
  align-content: center;
  gap: 2px;
}

.hero-next div + div {
  border-left: 1px solid var(--line);
}

.hero-next strong {
  color: var(--ink-strong);
  font-size: 0.94rem;
}

.hero-next span {
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.35;
}

.product-card {
  grid-column: 2;
  grid-row: 1;
  min-width: 0;
  border: 1px solid rgba(49, 196, 202, 0.34);
  border-radius: var(--radius);
  padding: 14px;
  background: var(--paper);
  box-shadow: var(--shadow);
}

.phone-shell {
  max-width: 356px;
  margin: 0 auto;
  border: 9px solid var(--brand-deep);
  border-radius: 28px;
  background: var(--paper);
  overflow: hidden;
}

.app-screenshot {
  width: 100%;
  height: auto;
  background: var(--paper);
}

.phone-screen {
  min-height: 492px;
  padding: 16px 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: var(--bg);
}

.phone-top,
.phone-row,
.history-row,
.phone-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.phone-time {
  font-weight: 800;
}

.phone-title {
  color: var(--ink-strong);
  font-weight: 820;
}

.bars {
  display: inline-flex;
  gap: 3px;
  align-items: end;
}

.bars i {
  width: 3px;
  border-radius: 999px;
  background: var(--brand-deep);
}

.bars i:nth-child(1) {
  height: 7px;
}

.bars i:nth-child(2) {
  height: 11px;
}

.bars i:nth-child(3) {
  height: 15px;
}

.demo-label,
.section-kicker {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 760;
}

.speech-block {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px;
  background: #fff;
}

.speech-block.translated {
  border-color: rgba(49, 196, 202, 0.36);
  background: var(--brand-accent-soft);
}

.speech-block p {
  margin-bottom: 0;
  color: var(--ink);
  line-height: 1.45;
}

.audio-route {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 10px;
  background: #fff;
}

.route-icon,
.mode-icon {
  width: 34px;
  height: 34px;
  border: 1px solid rgba(49, 196, 202, 0.35);
  border-radius: var(--radius);
  display: grid;
  place-items: center;
  color: var(--brand);
  background: var(--panel-soft);
  font-size: 1rem;
  font-weight: 820;
}

.toggle {
  width: 44px;
  height: 25px;
  border-radius: 999px;
  padding: 3px;
  background: var(--success);
}

.toggle::after {
  content: "";
  width: 19px;
  height: 19px;
  border-radius: 999px;
  display: block;
  margin-left: auto;
  background: #fff;
}

.mode-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.mode {
  min-height: 58px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 7px 6px;
  display: grid;
  justify-items: center;
  gap: 5px;
  color: var(--ink);
  background: #fff;
  font-size: 0.76rem;
  font-weight: 730;
  text-align: center;
}

.mode.active {
  border-color: var(--brand);
  background: var(--brand-accent-soft);
  box-shadow: inset 0 0 0 1px var(--brand);
}

.history {
  border-top: 1px solid var(--line);
  padding-top: 10px;
  display: grid;
  gap: 8px;
}

.history-row {
  color: var(--muted);
  font-size: 0.82rem;
}

.mic-button {
  width: 54px;
  height: 54px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--brand);
  font-size: 1.35rem;
  font-weight: 900;
}

.section {
  padding: clamp(52px, 8vw, 86px) 0;
}

.section.alt {
  background: var(--paper);
}

.section-header {
  max-width: 720px;
  margin-bottom: 30px;
}

h2 {
  margin-bottom: 10px;
  color: var(--ink-strong);
  font-size: 2.75rem;
  line-height: 1.12;
  font-weight: 850;
  letter-spacing: 0;
}

.section-header p,
.page-lede {
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.8;
  overflow-wrap: anywhere;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
}

.feature-demo {
  margin-top: 24px;
  display: grid;
  grid-template-columns: minmax(260px, 0.42fr) minmax(0, 1fr);
  align-items: center;
  gap: clamp(22px, 5vw, 56px);
}

.feature-demo .product-card {
  grid-column: auto;
  grid-row: auto;
  width: 100%;
  max-width: 340px;
}

.product-card.compact {
  padding: 12px;
  box-shadow: 0 12px 34px rgba(7, 31, 41, 0.08);
}

.feature-demo .phone-shell {
  max-width: 292px;
}

.feature-demo-copy {
  max-width: 520px;
}

.feature-demo-copy h3 {
  margin: 6px 0 8px;
  font-size: 1.75rem;
}

.feature-demo-copy p {
  color: var(--muted);
}

.feature-card,
.scenario-card,
.plan-card,
.notice-card,
.faq-card,
.legal-card,
.info-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}

.feature-card:hover,
.scenario-card:hover,
.plan-card:hover {
  border-color: var(--line-strong);
  box-shadow: 0 10px 28px rgba(7, 31, 41, 0.07);
}

.feature-card {
  min-height: 176px;
  padding: 20px;
  display: flex;
  align-items: flex-start;
}

h3 {
  margin-bottom: 7px;
  color: var(--ink-strong);
  font-size: 1.08rem;
  line-height: 1.35;
  font-weight: 820;
}

.feature-card p,
.scenario-card p,
.plan-card p,
.notice-card p,
.faq-card p,
.legal-card p,
.info-card p,
.footer p {
  margin-bottom: 0;
  color: var(--muted);
  overflow-wrap: anywhere;
}

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.scenario-card {
  min-height: 130px;
  padding: 18px;
  display: grid;
  align-content: start;
  gap: 6px;
}

.usage-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
}

.plan-card {
  min-height: 210px;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.plan-card strong {
  display: block;
  color: var(--brand);
  font-size: 1.45rem;
  line-height: 1.2;
}

.plan-card p {
  font-size: 0.94rem;
}

.pricing-note {
  margin-top: 18px;
  border: 1px solid var(--line-warning);
  border-radius: var(--radius);
  padding: 14px 16px;
  color: var(--warning);
  background: var(--warning-soft);
}

.limitations-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 18px;
  align-items: start;
}

.notice-card {
  padding: 22px;
}

.notice-list {
  margin: 12px 0 0;
  padding-left: 20px;
  color: var(--muted);
}

.notice-list li + li {
  margin-top: 8px;
}

.support-band {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--paper);
}

.support-band .container {
  min-height: 190px;
  padding: 34px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.support-band h2 {
  margin-bottom: 8px;
  font-size: 2.25rem;
}

.footer {
  padding: 34px 0 42px;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 12px 22px;
}

.footer-links a,
.text-link {
  color: var(--muted);
  font-weight: 700;
  text-decoration: none;
}

.page-hero {
  padding: clamp(40px, 7vw, 78px) 0 34px;
  border-bottom: 1px solid var(--line);
  background: var(--paper);
}

.page-hero h1 {
  max-width: 850px;
  margin-bottom: 14px;
  font-size: 4.4rem;
  line-height: 1.04;
}

.page-hero .page-lede {
  max-width: 760px;
}

.language-jump {
  margin: 18px 0 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.language-jump a {
  min-height: 40px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 8px 14px;
  display: inline-flex;
  align-items: center;
  color: var(--brand-link);
  background: var(--panel-soft);
  font-weight: 780;
  text-decoration: none;
}

.language-jump a:hover {
  border-color: var(--brand-accent);
  background: var(--paper);
}

.support-layout,
.legal-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(290px, 0.38fr);
  gap: 24px;
  align-items: start;
}

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

.faq-card,
.legal-card,
.info-card {
  padding: 20px;
}

.faq-card h2,
.legal-card h2,
.info-card h2 {
  margin-bottom: 8px;
  font-size: 1.25rem;
}

.info-card {
  position: sticky;
  top: 92px;
}

.plain-list {
  margin: 10px 0 0;
  padding-left: 20px;
  color: var(--muted);
  overflow-wrap: anywhere;
}

.plain-list li + li {
  margin-top: 7px;
}

.email-link {
  margin: 8px 0 16px;
  display: inline-flex;
  color: var(--brand-link);
  font-size: 1.05rem;
  font-weight: 830;
  text-decoration: none;
  overflow-wrap: anywhere;
}

.legal-card h3 {
  margin-top: 18px;
}

.english {
  border-color: var(--line-strong);
  background: var(--paper);
}

.legal-note {
  border-color: var(--line-warning);
  background: var(--warning-soft);
}

.small-text {
  color: var(--muted-2);
  font-size: 0.92rem;
}

@media (max-width: 980px) {
  .header-inner {
    min-height: auto;
    padding: 14px 0;
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }

  .site-nav {
    width: 100%;
    justify-content: flex-start;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .hero-grid,
  .limitations-grid,
  .support-layout,
  .legal-layout {
    grid-template-columns: 1fr;
  }

  .hero-copy,
  .product-card,
  .hero-next {
    grid-column: auto;
    grid-row: auto;
  }

  .hero-copy {
    padding-bottom: 0;
  }

  h1 {
    font-size: 4.45rem;
  }

  .hero-subtitle {
    font-size: 3.65rem;
  }

  h2 {
    font-size: 2.4rem;
  }

  .page-hero h1 {
    font-size: 3.55rem;
  }

  .hero-next {
    grid-column: auto;
  }

  .product-card {
    max-width: 460px;
  }

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

  .feature-demo {
    grid-template-columns: 1fr;
  }

  .feature-demo .product-card,
  .feature-demo-copy {
    max-width: 460px;
  }

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

  .support-band .container,
  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }

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

  .info-card {
    position: static;
  }
}

@media (max-width: 640px) {
  .container,
  .header-inner {
    width: min(var(--container), calc(100% - 28px));
  }

  .site-nav {
    gap: 18px;
    font-size: 0.88rem;
  }

  .hero {
    padding-top: 30px;
  }

  .hero-grid {
    display: block;
  }

  .hero-copy,
  .product-card,
  .hero-next {
    margin-top: 26px;
  }

  .hero-copy {
    margin-top: 0;
    max-width: 100%;
  }

  h1 {
    font-size: 2.55rem;
    line-height: 1.04;
    overflow-wrap: anywhere;
  }

  .hero-subtitle {
    font-size: 2.25rem;
    line-height: 1.06;
  }

  h2,
  .support-band h2 {
    font-size: 2rem;
  }

  .page-hero h1 {
    font-size: 2.65rem;
  }

  .hero-lede {
    font-size: 1.05rem;
  }

  .hero-lede,
  .scope-note,
  .page-hero .page-lede,
  .page-lede,
  .faq-card p,
  .legal-card p,
  .info-card p,
  .plain-list,
  .email-link {
    max-width: 320px;
  }

  .hero-actions,
  .support-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .hero-next,
  .feature-grid,
  .scenario-grid,
  .usage-grid {
    grid-template-columns: 1fr;
  }

  .hero-next div + div {
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .phone-screen {
    min-height: auto;
    padding: 16px 14px 18px;
  }

  .product-card {
    width: 100%;
    max-width: 100%;
    min-width: 0;
    overflow: hidden;
  }

  .phone-shell {
    width: 100%;
    max-width: 260px;
  }

  .feature-demo .phone-shell {
    max-width: 250px;
  }

  .mode-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .feature-card,
  .plan-card {
    min-height: auto;
  }
}

@media (max-width: 380px) {
  h1 {
    font-size: 2.35rem;
  }

  .hero-subtitle {
    font-size: 2.1rem;
  }
}