:root {
  color-scheme: light;
  --ink: #111827;
  --muted: #64748b;
  --soft: #f4f7fb;
  --line: #dbe7eb;
  --teal-900: #134e4a;
  --teal-700: #0f766e;
  --teal-600: #0d9488;
  --teal-400: #2dd4bf;
  --mint: #ccfbf1;
  --paper: #ffffff;
  --warm: #fff7ed;
  --shadow: 0 24px 70px rgba(15, 23, 42, 0.14);
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: #fbfdfc;
}

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

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px clamp(20px, 5vw, 72px);
  background: rgba(255, 255, 255, 0.84);
  border-bottom: 1px solid rgba(219, 231, 235, 0.8);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand img {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  box-shadow: 0 10px 24px rgba(13, 148, 136, 0.24);
}

.brand span {
  display: grid;
  gap: 1px;
  line-height: 1.1;
}

.brand strong {
  font-size: 17px;
}

.brand small {
  color: var(--teal-700);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.8px;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2vw, 28px);
  color: #334155;
  font-size: 14px;
  font-weight: 700;
}

.nav-links a {
  padding: 8px 0;
}

.hero {
  position: relative;
  min-height: 92vh;
  display: grid;
  align-items: center;
  padding: 112px clamp(20px, 6vw, 92px) 80px;
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(8, 47, 73, 0.86) 0%, rgba(19, 78, 74, 0.72) 44%, rgba(15, 118, 110, 0.28) 100%),
    linear-gradient(135deg, #082f49 0%, #134e4a 58%, #fbfdfc 100%);
}

.hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 96px;
  background: linear-gradient(180deg, rgba(251, 253, 252, 0), #fbfdfc 92%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  width: min(640px, 100%);
  color: #ffffff;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--teal-600);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 1.4px;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #99f6e4;
}

.hero h1 {
  margin: 0;
  font-size: clamp(64px, 11vw, 128px);
  line-height: 0.95;
  font-weight: 800;
}

.lead {
  margin: 22px 0 0;
  width: min(620px, 100%);
  font-size: clamp(24px, 3.5vw, 42px);
  line-height: 1.22;
  font-weight: 800;
}

.hero-text {
  margin: 22px 0 0;
  width: min(560px, 100%);
  color: rgba(255, 255, 255, 0.86);
  font-size: 17px;
  line-height: 1.9;
}

.scenario-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.scenario-list span {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 14px;
  border: 1px solid rgba(153, 246, 228, 0.45);
  border-radius: 8px;
  color: #ccfbf1;
  background: rgba(255, 255, 255, 0.08);
  font-size: 13px;
  font-weight: 800;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 24px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 800;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  color: #ffffff;
  background: var(--teal-600);
  box-shadow: 0 16px 30px rgba(13, 148, 136, 0.28);
}

.btn-primary:hover {
  background: var(--teal-700);
}

.btn-secondary {
  color: var(--teal-900);
  background: #ffffff;
  border-color: rgba(15, 118, 110, 0.16);
}

.btn-full {
  width: 100%;
}

.hero-backdrop {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.relation-scene {
  position: absolute;
  right: clamp(-120px, -4vw, -32px);
  bottom: 42px;
  width: min(660px, 58vw);
  aspect-ratio: 1.18;
  border-radius: 32px 0 0 32px;
  background:
    linear-gradient(180deg, rgba(255, 247, 237, 0.94), rgba(204, 251, 241, 0.86)),
    radial-gradient(circle at 78% 14%, rgba(45, 212, 191, 0.35), transparent 34%);
  box-shadow: var(--shadow);
  opacity: 0.96;
}

.relation-scene::before {
  content: "";
  position: absolute;
  inset: 36px 52px 42px;
  border-radius: 28px;
  background:
    linear-gradient(110deg, rgba(255, 255, 255, 0.7), rgba(255, 255, 255, 0.18)),
    repeating-linear-gradient(90deg, rgba(19, 78, 74, 0.06) 0 1px, transparent 1px 54px);
}

.relation-scene::after {
  content: "";
  position: absolute;
  left: 86px;
  right: 88px;
  bottom: 82px;
  height: 18px;
  border-radius: 99px;
  background: rgba(19, 78, 74, 0.14);
}

.app-splash-shot {
  position: absolute;
  right: 42px;
  top: 42px;
  z-index: 4;
  width: min(190px, 30%);
  aspect-ratio: 9 / 20;
  object-fit: cover;
  object-position: top center;
  border: 8px solid #0a0a0a;
  border-radius: 28px;
  box-shadow: 0 20px 48px rgba(15, 23, 42, 0.24);
}

.scene-copy {
  position: absolute;
  top: 70px;
  left: 72px;
  z-index: 2;
  width: min(260px, 48%);
  padding: 18px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 16px 48px rgba(15, 23, 42, 0.12);
}

.scene-copy span,
.scene-copy p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

.scene-copy strong {
  display: block;
  margin: 6px 0;
  color: var(--teal-900);
  font-size: 22px;
}

.waveform {
  position: absolute;
  left: 92px;
  bottom: 128px;
  z-index: 3;
  display: flex;
  align-items: end;
  gap: 8px;
  height: 76px;
}

.waveform i {
  display: block;
  width: 10px;
  height: 28px;
  border-radius: 99px;
  background: var(--teal-600);
  opacity: 0.85;
}

.waveform i:nth-child(2),
.waveform i:nth-child(8) {
  height: 48px;
}

.waveform i:nth-child(3),
.waveform i:nth-child(6) {
  height: 66px;
  background: var(--teal-400);
}

.waveform i:nth-child(4),
.waveform i:nth-child(7) {
  height: 38px;
}

.waveform i:nth-child(5) {
  height: 58px;
}

.people span {
  position: absolute;
  z-index: 2;
  display: block;
  border-radius: 999px 999px 42px 42px;
  background: #134e4a;
}

.people span::before {
  content: "";
  position: absolute;
  top: -62px;
  left: 50%;
  width: 86px;
  height: 86px;
  border-radius: 50%;
  background: #f6c7a3;
  transform: translateX(-50%);
}

.people span::after {
  content: "";
  position: absolute;
  top: -71px;
  left: 50%;
  width: 94px;
  height: 52px;
  border-radius: 60px 60px 18px 18px;
  background: #2f4858;
  transform: translateX(-50%);
}

.speaker-a {
  right: 220px;
  bottom: 98px;
  width: 120px;
  height: 168px;
}

.speaker-b {
  right: 122px;
  bottom: 96px;
  width: 90px;
  height: 128px;
  background: #0d9488 !important;
}

.speaker-b::before {
  width: 68px !important;
  height: 68px !important;
  top: -50px !important;
}

.speaker-b::after {
  width: 76px !important;
  height: 42px !important;
  top: -58px !important;
}

.section {
  padding: 92px clamp(20px, 6vw, 92px);
}

.section-heading {
  width: min(760px, 100%);
  margin: 0 auto 38px;
  text-align: center;
}

.section h2 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(30px, 4vw, 54px);
  line-height: 1.16;
}

.section-heading p:not(.eyebrow),
.insight-copy p {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.9;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  width: min(1120px, 100%);
  margin: 0 auto;
}

.feature-card,
.download-card {
  border: 1px solid rgba(219, 231, 235, 0.92);
  border-radius: 8px;
  background: var(--paper);
  box-shadow: 0 10px 34px rgba(15, 23, 42, 0.07);
}

.feature-card {
  min-height: 260px;
  padding: 30px;
}

.feature-card span[class^="icon"] {
  position: relative;
  display: inline-flex;
  width: 46px;
  height: 46px;
  margin-bottom: 32px;
  border-radius: 14px;
  background: #f0fdfa;
  border: 1px solid #99f6e4;
}

.icon-mic::before {
  content: "";
  position: absolute;
  inset: 10px 16px 14px;
  border: 3px solid var(--teal-600);
  border-top-width: 10px;
  border-radius: 99px;
}

.icon-spark::before,
.icon-spark::after {
  content: "";
  position: absolute;
  top: 10px;
  left: 20px;
  width: 6px;
  height: 24px;
  border-radius: 99px;
  background: var(--teal-600);
}

.icon-spark::after {
  transform: rotate(90deg);
}

.icon-check::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 14px;
  width: 18px;
  height: 10px;
  border-left: 4px solid var(--teal-600);
  border-bottom: 4px solid var(--teal-600);
  transform: rotate(-45deg);
}

.feature-card h3 {
  margin: 0 0 12px;
  font-size: 22px;
}

.feature-card p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.9;
}

.insight-section {
  display: grid;
  grid-template-columns: minmax(300px, 420px) minmax(0, 1fr);
  gap: clamp(36px, 7vw, 92px);
  align-items: center;
  background:
    linear-gradient(180deg, #fbfdfc 0%, #f1f5f9 100%);
}

.phone-preview {
  display: flex;
  justify-content: center;
}

.phone-shell {
  width: min(320px, 82vw);
  min-height: 650px;
  padding: 18px 16px 20px;
  border: 10px solid #0a0a0a;
  border-radius: 44px;
  background: #f4f7fb;
  box-shadow: var(--shadow);
}

.phone-status {
  display: flex;
  justify-content: space-between;
  padding: 4px 10px 12px;
  color: var(--teal-900);
  font-size: 12px;
  font-weight: 800;
}

.app-hero {
  display: grid;
  gap: 8px;
  padding: 22px 20px 26px;
  border-radius: 24px;
  color: #ffffff;
  background: linear-gradient(150deg, #134e4a, #0d9488);
}

.app-hero small,
.app-card small {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.8px;
  text-transform: uppercase;
}

.app-hero strong {
  font-size: 23px;
}

.app-hero span {
  color: rgba(255, 255, 255, 0.78);
  font-size: 12px;
}

.app-card {
  margin-top: 14px;
  padding: 18px;
  border-radius: 14px;
  background: #ffffff;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.07);
}

.app-card small {
  color: #94a3b8;
}

.app-card h3 {
  margin: 10px 0;
  font-size: 18px;
  line-height: 1.4;
}

.app-card p {
  margin: 0;
  color: #475569;
  font-size: 13px;
  line-height: 1.75;
}

.app-card.soft {
  background: #f0fdfa;
  border: 1px solid #99f6e4;
}

.app-tabs {
  display: flex;
  justify-content: center;
  gap: 18px;
  margin-top: 34px;
}

.app-tabs i {
  width: 22px;
  height: 22px;
  border-radius: 8px;
  background: #cbd5e1;
}

.app-tabs i:first-child {
  background: var(--teal-600);
}

.insight-copy {
  width: min(680px, 100%);
}

.insight-copy h2 {
  margin-bottom: 22px;
}

.metric-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 34px 0 0;
}

.metric-list div {
  padding: 18px;
  border-left: 3px solid var(--teal-600);
  background: #ffffff;
}

.metric-list dt {
  margin-bottom: 8px;
  color: var(--teal-900);
  font-weight: 800;
}

.metric-list dd {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

.privacy-section {
  background: #ffffff;
}

.privacy-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  width: min(980px, 100%);
  margin: 0 auto;
}

.privacy-row span {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 88px;
  padding: 16px;
  border: 1px solid #dbe7eb;
  border-radius: 8px;
  color: var(--teal-900);
  background: #f8fafc;
  font-weight: 800;
}

.download-section {
  display: grid;
  grid-template-columns: minmax(260px, 0.72fr) minmax(420px, 1fr);
  gap: clamp(28px, 6vw, 76px);
  align-items: start;
  background:
    linear-gradient(135deg, rgba(240, 253, 250, 0.96), rgba(255, 247, 237, 0.82)),
    #fbfdfc;
}

.download-copy {
  position: sticky;
  top: 112px;
}

.download-copy h2 {
  margin-bottom: 20px;
}

.download-copy p:not(.eyebrow) {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.9;
}

.download-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 18px;
}

.download-card {
  padding: 24px;
}

.card-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 22px;
}

.platform-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border-radius: 14px;
  color: #ffffff;
  background: linear-gradient(135deg, #134e4a, #0d9488);
  font-size: 20px;
  font-weight: 900;
}

.card-head h3 {
  margin: 0 0 4px;
  font-size: 22px;
}

.card-head p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.qr-box {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  aspect-ratio: 1;
  margin-bottom: 18px;
  padding: 16px;
  border: 1px solid #dbe7eb;
  border-radius: 8px;
  background: #ffffff;
}

.qr-box img,
.qr-box svg {
  width: 100%;
  height: 100%;
  max-width: 220px;
  max-height: 220px;
}

.ios-note {
  min-height: 170px;
  margin: 0 0 18px;
  padding: 18px;
  border-left: 3px solid var(--teal-600);
  background: #f8fafc;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.9;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  padding: 32px clamp(20px, 6vw, 92px);
  color: #d1fae5;
  background: #0f2f2d;
}

.site-footer div {
  display: grid;
  gap: 6px;
}

.site-footer span,
.site-footer a {
  color: rgba(209, 250, 229, 0.76);
  font-size: 13px;
}

@media (max-width: 980px) {
  .hero {
    min-height: auto;
    padding-bottom: 320px;
  }

  .relation-scene {
    left: 20px;
    right: auto;
    bottom: 48px;
    width: calc(100% - 40px);
    max-width: 620px;
    height: 280px;
  }

  .scene-copy {
    top: 32px;
    left: 30px;
    width: min(240px, 54%);
  }

  .waveform {
    left: 44px;
    bottom: 58px;
  }

  .speaker-a {
    right: 184px;
    bottom: 54px;
    transform: scale(0.78);
    transform-origin: bottom right;
  }

  .speaker-b {
    right: 112px;
    bottom: 54px;
    transform: scale(0.78);
    transform-origin: bottom right;
  }

  .app-splash-shot {
    right: 28px;
    top: 28px;
    width: 132px;
  }

  .feature-grid,
  .insight-section,
  .download-section,
  .download-panel {
    grid-template-columns: 1fr;
  }

  .download-copy {
    position: static;
  }

  .feature-card {
    min-height: 0;
  }
}

@media (max-width: 720px) {
  .site-header {
    position: sticky;
    padding: 12px 18px;
  }

  .nav-links {
    gap: 12px;
    font-size: 12px;
  }

  .brand img {
    width: 38px;
    height: 38px;
  }

  .brand small {
    display: none;
  }

  .hero {
    padding: 64px 20px 300px;
  }

  .lead {
    font-size: 26px;
  }

  .hero-text {
    font-size: 15px;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .section {
    padding: 70px 20px;
  }

  .section-heading {
    text-align: left;
  }

  .metric-list,
  .privacy-row {
    grid-template-columns: 1fr;
  }

  .phone-shell {
    min-height: 590px;
  }

  .relation-scene {
    height: 250px;
  }

  .scene-copy {
    width: calc(100% - 154px);
    padding: 14px;
  }

  .scene-copy strong {
    font-size: 18px;
  }

  .scene-copy p {
    display: none;
  }

  .waveform {
    transform: scale(0.8);
    transform-origin: left bottom;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 420px) {
  .nav-links a:nth-child(2),
  .nav-links a:nth-child(3) {
    display: none;
  }

  .hero h1 {
    font-size: 62px;
  }

  .relation-scene {
    left: 12px;
    width: calc(100% - 24px);
  }

  .speaker-a {
    right: 140px;
  }

  .speaker-b {
    right: 76px;
  }

  .app-splash-shot {
    width: 108px;
    right: 18px;
  }
}