:root {
  color-scheme: light;
  --ink: #151923;
  --muted: #5d6675;
  --line: rgba(21, 25, 35, 0.12);
  --paper: rgba(255, 255, 255, 0.76);
  --brand-blue: #0f4d81;
  --accent-green: #19d89b;
  --accent-cyan: #16bce3;
  --accent-orange: #fb9b1a;
  --accent-pink: #e953b8;
  --shadow: 0 22px 80px rgba(15, 35, 56, 0.14);
  --header-height: 72px;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background: #f7fbfa;
  overflow-x: hidden;
}

button,
a {
  font: inherit;
}

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

.signal-canvas {
  position: fixed;
  inset: 0;
  z-index: -2;
  width: 100%;
  height: 100%;
  background:
    linear-gradient(180deg, rgba(247, 251, 250, 0.96), rgba(242, 250, 248, 0.9)),
    #f7fbfa;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 48px;
  background: rgba(247, 251, 250, 0.68);
  border-bottom: 1px solid rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(18px) saturate(150%);
}

.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 800;
}

.brand-logo {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  box-shadow: 0 8px 24px rgba(251, 155, 26, 0.24);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  color: rgba(21, 25, 35, 0.74);
  font-size: 14px;
  font-weight: 650;
}

.nav-links a {
  transition: color 160ms ease, transform 160ms ease;
}

.nav-links a:hover {
  color: var(--brand-blue);
  transform: translateY(-1px);
}

.hero {
  position: relative;
  min-height: 92svh;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 520px);
  align-items: center;
  gap: 56px;
  padding: 122px 7vw 64px;
}

.hero::after {
  content: "";
  position: absolute;
  left: 7vw;
  right: 7vw;
  bottom: 0;
  height: 1px;
  background: var(--line);
}

.hero-copy {
  max-width: 680px;
}

.brand-kicker,
.section-kicker {
  margin: 0 0 18px;
  color: var(--brand-blue);
  font-size: 13px;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  max-width: 760px;
  font-size: 82px;
  line-height: 1.02;
  letter-spacing: 0;
}

.hero h1 span {
  color: var(--brand-blue);
}

.hero-summary {
  max-width: 560px;
  margin: 28px 0 0;
  color: var(--muted);
  font-size: 19px;
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: 36px;
}

.primary-action,
.secondary-action {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  padding: 0 20px;
  border: 0;
  cursor: pointer;
  font-weight: 800;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease,
    border-color 180ms ease,
    background 180ms ease;
}

.primary-action {
  color: #071c17;
  background: var(--accent-green);
  box-shadow: 0 16px 40px rgba(25, 216, 155, 0.26);
}

.secondary-action {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.66);
  border: 1px solid rgba(21, 25, 35, 0.14);
}

.primary-action:hover,
.secondary-action:hover {
  transform: translateY(-2px);
}

.primary-action:active,
.secondary-action:active {
  transform: translateY(0);
}

.copy-status {
  min-height: 24px;
  margin: 14px 0 0;
  color: var(--brand-blue);
  font-size: 14px;
  font-weight: 700;
}

.hero-visual {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 620px;
}

.hero-visual::before,
.hero-visual::after {
  content: "";
  position: absolute;
  width: 58%;
  height: 2px;
  background: var(--accent-cyan);
  opacity: 0.5;
  transform: rotate(-14deg);
}

.hero-visual::before {
  top: 14%;
  left: 0;
}

.hero-visual::after {
  right: 2%;
  bottom: 20%;
  background: var(--accent-pink);
}

.device-shell {
  position: relative;
  z-index: 1;
  width: 360px;
  padding: 14px;
  border-radius: 38px;
  background: #111723;
  box-shadow:
    0 28px 80px rgba(15, 35, 56, 0.26),
    inset 0 0 0 1px rgba(255, 255, 255, 0.08);
  transform: rotate(3deg);
  transition: transform 240ms ease;
}

.device-shell:hover {
  transform: rotate(0deg) translateY(-4px);
}

.screenshot-device {
  width: min(328px, 100%);
  padding: 10px;
  border-radius: 30px;
}

.screenshot-device .app-screen {
  min-height: 0;
}

.screenshot-screen {
  overflow: visible;
  border-radius: 0;
  background: transparent;
  border: 0;
}

.screenshot-preview {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1179 / 2556;
  object-fit: contain;
  background: #ffffff;
}

.screenshot-tabs {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 7px;
  margin-top: 10px;
}

.screenshot-tabs .topic-chip {
  min-width: 0;
  min-height: 34px;
  padding: 0 6px;
  border-color: rgba(255, 255, 255, 0.14);
  color: rgba(255, 255, 255, 0.72);
  background: rgba(255, 255, 255, 0.08);
  font-size: 11px;
}

.screenshot-tabs .topic-chip.active {
  color: #081b17;
  background: var(--accent-green);
}

.device-top {
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
}

.device-top span:first-child {
  width: 48px;
  height: 5px;
  border-radius: 99px;
  background: rgba(255, 255, 255, 0.2);
}

.device-top span:last-child {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.22);
}

.app-screen {
  min-height: 640px;
  overflow: hidden;
  border-radius: 28px;
  background: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.app-nav {
  padding: 22px 18px 14px;
  background: #0f4d81;
  color: #ffffff;
}

.search-pill {
  height: 38px;
  display: flex;
  align-items: center;
  padding: 0 14px;
  border-radius: 8px;
  color: rgba(255, 255, 255, 0.72);
  background: rgba(255, 255, 255, 0.13);
  font-size: 13px;
}

.trust-switch {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px;
  margin-top: 14px;
  padding: 4px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.12);
  font-size: 12px;
  font-weight: 800;
}

.trust-switch span {
  min-height: 30px;
  display: grid;
  place-items: center;
  border-radius: 6px;
  color: rgba(255, 255, 255, 0.68);
}

.trust-switch .active {
  color: #0b2e4b;
  background: #ffffff;
}

.topic-strip {
  display: flex;
  gap: 8px;
  padding: 18px 16px 8px;
  overflow: hidden;
}

.topic-chip {
  flex: 0 0 auto;
  min-height: 34px;
  padding: 0 12px;
  border-radius: 8px;
  border: 1px solid rgba(15, 77, 129, 0.15);
  color: rgba(21, 25, 35, 0.66);
  background: #f7fafc;
  font-size: 12px;
  font-weight: 850;
}

.topic-chip.active {
  color: #ffffff;
  border-color: transparent;
  background: var(--brand-blue);
}

.feed-preview {
  margin: 12px 16px;
  padding: 18px;
  border-radius: 8px;
  border: 1px solid rgba(15, 77, 129, 0.1);
  background: #ffffff;
  box-shadow: 0 16px 40px rgba(15, 35, 56, 0.08);
}

.feed-meta {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: #718096;
  font-size: 12px;
  font-weight: 750;
}

.feed-topic {
  color: var(--accent-orange);
}

.feed-preview h2 {
  margin: 18px 0 0;
  font-size: 24px;
  line-height: 1.25;
  letter-spacing: 0;
}

.feed-preview p {
  min-height: 76px;
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
}

.feed-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.feed-tags span {
  padding: 7px 9px;
  border-radius: 7px;
  color: #0f4d81;
  background: rgba(22, 188, 227, 0.1);
  font-size: 12px;
  font-weight: 800;
}

.bottom-preview {
  display: grid;
  grid-template-columns: 1fr 52px 1fr 1fr;
  align-items: center;
  gap: 10px;
  margin: 110px 16px 16px;
  padding: 10px;
  border-radius: 8px;
  background: rgba(248, 250, 252, 0.94);
  box-shadow: 0 12px 34px rgba(15, 35, 56, 0.08);
  color: #64748b;
  font-size: 12px;
  font-weight: 850;
  text-align: center;
}

.bottom-preview button {
  width: 52px;
  height: 52px;
  border: 0;
  border-radius: 50%;
  color: #071c17;
  background: var(--accent-green);
  font-size: 28px;
  font-weight: 700;
}

.section {
  padding: 96px 7vw;
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(200px, 360px) minmax(0, 760px);
  gap: 64px;
  align-items: start;
  margin-bottom: 36px;
}

.section-heading h2,
.trust-copy h2,
.final-cta h2 {
  margin: 0;
  font-size: 48px;
  line-height: 1.12;
  letter-spacing: 0;
}

.feature-list {
  border-top: 1px solid var(--line);
}

.feature-row {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 28px;
  align-items: start;
  padding: 30px 0;
  border-bottom: 1px solid var(--line);
  transition:
    transform 180ms ease,
    border-color 180ms ease,
    color 180ms ease;
}

.feature-row:hover {
  transform: translateX(8px);
  border-color: rgba(15, 77, 129, 0.32);
}

.feature-index {
  color: var(--accent-pink);
  font-size: 14px;
  font-weight: 900;
}

.feature-row h3 {
  margin: 0;
  font-size: 28px;
  line-height: 1.2;
  letter-spacing: 0;
}

.feature-row p {
  max-width: 720px;
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.75;
}

.trust-section {
  display: grid;
  grid-template-columns: minmax(0, 0.88fr) minmax(340px, 0.72fr);
  gap: 72px;
  align-items: center;
  background: rgba(255, 255, 255, 0.36);
  border-top: 1px solid rgba(255, 255, 255, 0.78);
  border-bottom: 1px solid rgba(21, 25, 35, 0.08);
}

.trust-copy p:not(.section-kicker) {
  max-width: 620px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.8;
}

.trust-flow {
  padding: 8px 0;
  border-top: 1px solid var(--line);
}

.flow-line {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 22px;
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}

.flow-line span {
  color: var(--muted);
  font-size: 14px;
  font-weight: 800;
}

.flow-line strong {
  font-size: 24px;
  line-height: 1.25;
}

.final-cta {
  min-height: 72svh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 112px 7vw 128px;
}

.bird-mark {
  width: 96px;
  height: 96px;
  margin-bottom: 22px;
  image-rendering: auto;
}

.final-cta h2 {
  max-width: 820px;
}

.final-cta .primary-action {
  margin-top: 32px;
}

.mobile-site {
  display: none;
  min-height: 100svh;
  padding: calc(var(--header-height) + 18px) 16px 0;
}

.mobile-hero {
  min-height: calc(100svh - var(--header-height) - 18px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 20px;
  padding: 10px 0 28px;
}

.mobile-hero-copy {
  position: relative;
  padding: 2px 0 0;
}

.mobile-brand-line {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
  color: var(--ink);
  font-size: 18px;
  font-weight: 900;
}

.mobile-brand-logo {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  box-shadow: 0 10px 28px rgba(251, 155, 26, 0.24);
}

.mobile-hero h1 {
  max-width: 360px;
  margin: 0;
  font-size: 42px;
  line-height: 1.08;
  letter-spacing: 0;
}

.mobile-hero-summary {
  max-width: 360px;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.68;
}

.mobile-primary-action {
  width: 100%;
  margin-top: 22px;
}

.mobile-live-panel {
  position: relative;
  overflow: hidden;
  border-radius: 22px;
  padding: 16px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(255, 255, 255, 0.82);
  box-shadow: 0 18px 54px rgba(15, 35, 56, 0.13);
  backdrop-filter: blur(18px) saturate(150%);
}

.mobile-live-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(120deg, rgba(22, 188, 227, 0.14), rgba(25, 216, 155, 0) 42%),
    linear-gradient(300deg, rgba(233, 83, 184, 0.12), rgba(251, 155, 26, 0) 46%);
}

.mobile-live-panel > * {
  position: relative;
}

.mobile-screenshot-panel {
  padding: 14px;
}

.mobile-screenshot-stage {
  margin-top: 14px;
  background: #111723;
  box-shadow: 0 14px 38px rgba(15, 35, 56, 0.12);
}

.mobile-screenshot-preview {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1179 / 2556;
  object-fit: contain;
  background: #ffffff;
}

.mobile-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.mobile-panel-header span {
  color: var(--brand-blue);
  font-size: 18px;
  font-weight: 900;
}

.mobile-panel-header strong {
  color: rgba(21, 25, 35, 0.58);
  font-size: 11px;
}

.mobile-topic-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 7px;
  margin-top: 16px;
}

.mobile-topic-chip {
  min-width: 0;
  min-height: 36px;
  padding: 0 6px;
  border: 1px solid rgba(15, 77, 129, 0.14);
  border-radius: 8px;
  color: rgba(21, 25, 35, 0.64);
  background: rgba(255, 255, 255, 0.7);
  font-size: 12px;
  font-weight: 850;
}

.mobile-topic-chip.active {
  color: #ffffff;
  border-color: transparent;
  background: var(--brand-blue);
}

.mobile-feed-preview {
  margin: 14px 0 0;
  padding: 16px;
  border-radius: 16px;
  background: #ffffff;
  box-shadow: 0 12px 34px rgba(15, 35, 56, 0.08);
}

.mobile-feed-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  color: #718096;
  font-size: 12px;
  font-weight: 800;
}

.mobile-feed-topic {
  color: var(--accent-orange);
}

.mobile-feed-preview h2 {
  min-height: 58px;
  margin: 16px 0 0;
  font-size: 22px;
  line-height: 1.28;
  letter-spacing: 0;
}

.mobile-feed-preview p {
  min-height: 74px;
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.mobile-feed-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 14px;
}

.mobile-feed-tags span {
  padding: 7px 9px;
  border-radius: 7px;
  color: #0f4d81;
  background: rgba(22, 188, 227, 0.1);
  font-size: 12px;
  font-weight: 800;
}

.mobile-section,
.mobile-start {
  padding: 72px 0;
}

.mobile-section h2,
.mobile-start h2 {
  max-width: 360px;
  margin: 0;
  font-size: 32px;
  line-height: 1.16;
  letter-spacing: 0;
}

.mobile-feature-stack {
  display: grid;
  gap: 12px;
  margin-top: 24px;
}

.mobile-feature-item {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 8px 12px;
  align-items: start;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

.mobile-feature-item:last-child {
  border-bottom: 1px solid var(--line);
}

.mobile-feature-item span {
  color: var(--accent-pink);
  font-size: 13px;
  font-weight: 900;
}

.mobile-feature-item strong {
  font-size: 20px;
  line-height: 1.2;
}

.mobile-feature-item p {
  grid-column: 2;
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.62;
}

.mobile-start {
  min-height: 64svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  text-align: left;
}

.mobile-bird-mark {
  width: 82px;
  height: 82px;
  margin-bottom: 18px;
}

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity 560ms ease,
    transform 560ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1100px) {
  .hero {
    grid-template-columns: 1fr;
    padding-top: 116px;
  }

  .hero h1 {
    font-size: 64px;
  }

  .hero-visual {
    min-height: 560px;
  }

  .section-heading,
  .trust-section {
    grid-template-columns: 1fr;
    gap: 34px;
  }
}

@media (max-width: 720px) {
  :root {
    --header-height: 62px;
  }

  .site-header {
    padding: 0 20px;
  }

  .nav-links {
    display: none;
  }

  .hero {
    min-height: 88svh;
    padding: 92px 22px 48px;
    gap: 26px;
  }

  .hero::after {
    left: 22px;
    right: 22px;
  }

  .brand-kicker,
  .section-kicker {
    font-size: 12px;
  }

  .hero h1 {
    font-size: 44px;
    line-height: 1.08;
  }

  .hero-summary {
    margin-top: 20px;
    font-size: 16px;
    line-height: 1.7;
  }

  .hero-actions {
    align-items: stretch;
  }

  .primary-action,
  .secondary-action {
    width: 100%;
  }

  .hero-visual {
    min-height: 500px;
  }

  .device-shell {
    width: min(332px, 100%);
    transform: none;
  }

  .app-screen {
    min-height: 560px;
  }

  .bottom-preview {
    margin-top: 56px;
  }

  .section {
    padding: 72px 22px;
  }

  .section-heading h2,
  .trust-copy h2,
  .final-cta h2 {
    font-size: 34px;
    line-height: 1.16;
  }

  .feature-row {
    grid-template-columns: 54px minmax(0, 1fr);
    gap: 18px;
    padding: 24px 0;
  }

  .feature-row:hover {
    transform: none;
  }

  .feature-row h3 {
    font-size: 22px;
  }

  .feature-row p,
  .trust-copy p:not(.section-kicker) {
    font-size: 15px;
  }

  .trust-section {
    padding-top: 76px;
    padding-bottom: 76px;
  }

  .flow-line {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 22px 0;
  }

  .flow-line strong {
    font-size: 21px;
  }
}

@media (max-width: 760px) {
  .desktop-site {
    display: none;
  }

  .mobile-site {
    display: block;
  }
}

html[data-client="desktop"] .desktop-site {
  display: block;
}

html[data-client="desktop"] .mobile-site {
  display: none;
}

html[data-client="mobile"] .desktop-site {
  display: none;
}

html[data-client="mobile"] .mobile-site {
  display: block;
}

html[data-client="mobile"] {
  --header-height: 60px;
}

html[data-client="mobile"] .site-header {
  height: var(--header-height);
  padding: 0 16px;
}

html[data-client="mobile"] .brand-lockup {
  font-size: 17px;
}

html[data-client="mobile"] .brand-logo {
  width: 34px;
  height: 34px;
}

html[data-client="mobile"] .nav-links {
  display: none;
}

html[data-client="mobile"] .signal-canvas {
  opacity: 0.88;
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}