:root {
  color-scheme: light;
  --page: #f5f5f7;
  --surface: #ffffff;
  --ink: #111114;
  --muted: #626268;
  --line: #d9d9df;
  --blue: #006bd6;
  --blue-hover: #0057b3;
  --yellow: #ffd20a;
  --purple: #54106e;
  --dark: #111216;
  --dark-muted: #a6a7ae;
  --content: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--page);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
}

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

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

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  border-bottom: 1px solid rgba(17, 17, 20, 0.1);
  background: rgba(245, 245, 247, 0.92);
  backdrop-filter: saturate(180%) blur(18px);
}

.nav-shell {
  width: min(calc(100% - 40px), var(--content));
  height: 56px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 16px;
  font-weight: 700;
}

.brand img {
  width: 30px;
  height: 30px;
  border-radius: 7px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 30px;
  font-size: 13px;
}

.nav-links a:not(.nav-download):hover {
  color: var(--blue);
}

.nav-download {
  padding: 8px 15px;
  color: #fff;
  border-radius: 18px;
  background: var(--blue);
}

.hero {
  min-height: 860px;
  height: calc(100svh - 96px);
  max-height: 940px;
  overflow: hidden;
  position: relative;
  display: grid;
  place-items: start center;
  padding: 76px 24px 0;
  background: var(--page);
}

.hero-copy {
  position: relative;
  z-index: 2;
  max-width: 820px;
  text-align: center;
}

.hero-icon {
  width: 82px;
  height: 82px;
  margin: 0 auto 24px;
  border-radius: 18px;
  box-shadow: 0 18px 50px rgba(84, 16, 110, 0.16);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--purple);
  font-size: 15px;
  font-weight: 700;
}

.hero h1 {
  margin: 0;
  font-size: 64px;
  line-height: 1.08;
  font-weight: 760;
  letter-spacing: 0;
}

.hero-summary {
  margin: 24px auto 0;
  color: var(--muted);
  font-size: 20px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-top: 30px;
}

.primary-button,
.secondary-button {
  min-height: 46px;
  padding: 12px 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 23px;
  font-size: 15px;
  font-weight: 650;
}

.primary-button {
  color: #fff;
  background: var(--blue);
}

.primary-button:hover {
  background: var(--blue-hover);
}

.secondary-button {
  color: var(--blue);
  border: 1px solid var(--blue);
}

.secondary-button:hover {
  color: #fff;
  background: var(--blue);
}

.platform-status {
  margin-top: 22px;
  display: flex;
  justify-content: center;
  gap: 24px;
  color: var(--muted);
  font-size: 13px;
}

.platform-status span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #a9a9ae;
}

.status-live {
  background: #27a55b;
}

.product-stage {
  position: absolute;
  z-index: 1;
  left: 50%;
  bottom: -430px;
  width: 390px;
  transform: translateX(-50%);
}

.phone-shell {
  width: 390px;
  height: 844px;
  overflow: hidden;
  position: relative;
  padding: 8px;
  border: 1px solid #2b2c31;
  border-radius: 48px;
  background: #050609;
  box-shadow: 0 44px 100px rgba(16, 16, 22, 0.24);
}

.phone-shell img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 40px;
}

.phone-speaker {
  position: absolute;
  z-index: 2;
  top: 17px;
  left: 50%;
  width: 84px;
  height: 22px;
  transform: translateX(-50%);
  border-radius: 12px;
  background: #050609;
}

.section {
  padding: 120px max(24px, calc((100% - var(--content)) / 2));
}

.section-heading,
.feature-intro {
  max-width: 740px;
}

.section h2 {
  margin: 0;
  font-size: 48px;
  line-height: 1.16;
  font-weight: 740;
  letter-spacing: 0;
}

.section-heading > p:last-child {
  max-width: 600px;
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 19px;
  line-height: 1.7;
}

.reason-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 56px;
  margin-top: 80px;
  padding-top: 36px;
  border-top: 1px solid var(--line);
}

.reason-grid article {
  min-width: 0;
}

.reason-number {
  display: block;
  margin-bottom: 36px;
  color: var(--blue);
  font-size: 14px;
  font-weight: 750;
}

.reason-grid h3,
.feature-list h3 {
  margin: 0 0 14px;
  font-size: 25px;
  line-height: 1.35;
}

.reason-grid p,
.feature-list p {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.75;
}

.section-dark {
  color: #fff;
  background: var(--dark);
}

.section-dark .eyebrow {
  color: var(--yellow);
}

.feature-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 76px;
  border-top: 1px solid #33343a;
  border-left: 1px solid #33343a;
}

.feature-list article {
  min-height: 280px;
  padding: 38px;
  border-right: 1px solid #33343a;
  border-bottom: 1px solid #33343a;
}

.feature-list article > span {
  display: block;
  margin-bottom: 70px;
  color: var(--dark-muted);
  font-size: 14px;
}

.feature-list p {
  color: var(--dark-muted);
}

.download-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  align-items: center;
  gap: 96px;
  min-height: 680px;
  background: var(--surface);
}

.download-copy {
  max-width: 700px;
}

.download-description {
  max-width: 650px;
  margin: 24px 0 32px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.75;
}

.release-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin-top: 24px;
  color: var(--muted);
  font-size: 13px;
}

.platform-note {
  margin: 18px 0 0;
  color: #7d7d84;
  font-size: 13px;
  line-height: 1.65;
}

.qr-tool {
  width: 280px;
  padding: 18px 18px 22px;
  text-align: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 24px 70px rgba(18, 18, 22, 0.09);
}

.qr-link {
  display: block;
  margin-bottom: 18px;
}

.qr-link img {
  width: 242px;
  height: 242px;
}

.qr-tool strong,
.qr-tool span {
  display: block;
}

.qr-tool strong {
  font-size: 17px;
}

.qr-tool span {
  margin-top: 7px;
  color: var(--muted);
  font-size: 13px;
}

.site-footer {
  width: min(calc(100% - 48px), var(--content));
  margin: 0 auto;
  padding: 44px 0 54px;
  display: flex;
  justify-content: space-between;
  gap: 32px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

.site-footer > div:first-child > span {
  color: var(--ink);
  font-size: 15px;
  font-weight: 700;
}

.site-footer p {
  margin: 10px 0 0;
}

.footer-links {
  display: flex;
  align-items: flex-start;
  gap: 24px;
}

.footer-links a:hover {
  color: var(--blue);
}

@media (max-width: 760px) {
  .nav-shell {
    width: min(calc(100% - 28px), var(--content));
  }

  .nav-links {
    gap: 12px;
  }

  .nav-links a:not(.nav-download) {
    display: none;
  }

  .hero {
    min-height: 740px;
    height: calc(100svh - 86px);
    max-height: 810px;
    padding: 42px 20px 0;
  }

  .hero-icon {
    width: 68px;
    height: 68px;
    margin-bottom: 18px;
    border-radius: 15px;
  }

  .hero h1 {
    font-size: 36px;
    line-height: 1.12;
  }

  .hero-summary {
    margin-top: 18px;
    font-size: 17px;
    line-height: 1.65;
  }

  .desktop-only {
    display: none;
  }

  .hero-actions {
    margin-top: 24px;
  }

  .primary-button,
  .secondary-button {
    min-height: 44px;
    padding: 11px 18px;
    font-size: 14px;
  }

  .platform-status {
    gap: 12px;
    margin-top: 18px;
    flex-direction: column;
    align-items: center;
  }

  .product-stage {
    bottom: -500px;
    width: 294px;
  }

  .phone-shell {
    width: 294px;
    height: 636px;
    padding: 6px;
    border-radius: 38px;
  }

  .phone-shell img {
    border-radius: 32px;
  }

  .phone-speaker {
    top: 13px;
    width: 66px;
    height: 18px;
  }

  .section {
    padding: 82px 22px;
  }

  .section h2 {
    font-size: 36px;
  }

  .section-heading > p:last-child,
  .download-description {
    font-size: 17px;
  }

  .reason-grid,
  .feature-list {
    grid-template-columns: 1fr;
  }

  .reason-grid {
    gap: 0;
    margin-top: 54px;
    padding-top: 0;
    border-top: 0;
  }

  .reason-grid article {
    padding: 30px 0;
    border-top: 1px solid var(--line);
  }

  .reason-number {
    margin-bottom: 20px;
  }

  .feature-list {
    margin-top: 52px;
  }

  .feature-list article {
    min-height: 0;
    padding: 30px 26px 34px;
  }

  .feature-list article > span {
    margin-bottom: 48px;
  }

  .download-section {
    grid-template-columns: 1fr;
    gap: 54px;
    min-height: 0;
  }

  .qr-tool {
    width: min(280px, 100%);
    justify-self: center;
  }

  .qr-link img {
    width: 100%;
    height: auto;
    aspect-ratio: 1;
  }

  .site-footer {
    padding: 36px 0 44px;
    flex-direction: column;
  }

  .footer-links {
    gap: 14px 20px;
    flex-wrap: wrap;
  }
}

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