:root {
  color-scheme: light;
  --ink: #17231f;
  --muted: #66746d;
  --line: #dfe7e2;
  --paper: #fbfdfb;
  --surface: #ffffff;
  --green: #2f7a5a;
  --green-deep: #195b43;
  --green-soft: #e4f2eb;
  --mint: #f1f8f4;
  --gold: #d99b34;
  --shadow: 0 18px 54px rgba(24, 69, 51, 0.16);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family:
    "PingFang SC",
    "Microsoft YaHei",
    "Noto Sans CJK SC",
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  line-height: 1.6;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px clamp(20px, 5vw, 72px);
  background: rgba(251, 253, 251, 0.9);
  border-bottom: 1px solid rgba(223, 231, 226, 0.78);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 20px;
  font-weight: 800;
}

.brand img {
  border-radius: 8px;
  object-fit: cover;
  box-shadow: 0 8px 22px rgba(47, 122, 90, 0.22);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  color: var(--muted);
  font-size: 15px;
}

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

.hero {
  position: relative;
  min-height: calc(100vh - 77px);
  overflow: hidden;
  display: grid;
  align-items: center;
  padding: clamp(64px, 9vw, 120px) clamp(20px, 5vw, 72px);
  background:
    linear-gradient(90deg, rgba(251, 253, 251, 0.98) 0%, rgba(251, 253, 251, 0.9) 48%, rgba(241, 248, 244, 0.78) 100%),
    var(--mint);
}

.hero-copy {
  position: relative;
  z-index: 2;
  max-width: 560px;
}

.eyebrow,
.section-kicker {
  margin: 0 0 10px;
  color: var(--green);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 12px;
  font-size: clamp(54px, 8vw, 96px);
  line-height: 0.95;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 16px;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.16;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 22px;
}

.hero-subtitle {
  max-width: 500px;
  color: #33443c;
  font-size: 20px;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 20px;
  border-radius: 8px;
  font-weight: 800;
}

.button.primary {
  background: var(--green);
  color: #fff;
  box-shadow: 0 14px 28px rgba(47, 122, 90, 0.24);
}

.button.secondary {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.7);
  color: var(--green-deep);
}

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

.release-note {
  margin-top: 16px;
  color: var(--muted);
  font-size: 14px;
}

.hero-media {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-phone {
  position: absolute;
  width: min(25vw, 270px);
  min-width: 180px;
  border-radius: 24px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(255, 255, 255, 0.8);
}

.phone-main {
  right: clamp(120px, 16vw, 260px);
  top: 11%;
  width: min(29vw, 320px);
  z-index: 3;
  transform: rotate(-1deg);
}

.phone-second {
  right: clamp(300px, 34vw, 520px);
  bottom: 7%;
  transform: rotate(-5deg);
  z-index: 2;
}

.phone-third {
  right: clamp(-8px, 4vw, 70px);
  bottom: 9%;
  transform: rotate(4deg);
  z-index: 1;
}

.section {
  padding: clamp(56px, 8vw, 100px) clamp(20px, 5vw, 72px);
}

.intro {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(280px, 1fr);
  gap: clamp(24px, 5vw, 80px);
  align-items: start;
  background: var(--surface);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.intro p:last-child,
.showcase-copy p,
.download-copy p,
.feature-item p,
.site-footer p {
  color: var(--muted);
}

.section-heading {
  max-width: 720px;
  margin-bottom: 32px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.feature-item {
  min-height: 250px;
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.feature-number {
  display: inline-flex;
  margin-bottom: 32px;
  color: var(--green);
  font-weight: 900;
}

.showcase {
  display: grid;
  grid-template-columns: minmax(260px, 0.75fr) minmax(0, 1.25fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
  background: var(--green-soft);
}

.screen-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(110px, 1fr));
  gap: 14px;
  align-items: end;
}

.screen-strip img {
  width: 100%;
  aspect-ratio: 1080 / 2424;
  object-fit: cover;
  object-position: top;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.84);
  box-shadow: var(--shadow);
}

.download {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: clamp(24px, 5vw, 72px);
  align-items: center;
  background: var(--surface);
}

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

.qr-card {
  margin: 0;
  justify-self: end;
  display: grid;
  justify-items: center;
  gap: 14px;
  padding: 26px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.qr-card img {
  border-radius: 8px;
}

.qr-card figcaption {
  color: var(--muted);
  font-size: 14px;
}

.privacy {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(280px, 1fr);
  gap: clamp(24px, 5vw, 72px);
  align-items: center;
}

.legal-links a {
  padding: 12px 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--green-deep);
  font-weight: 700;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 28px clamp(20px, 5vw, 72px);
  background: #12251d;
  color: #fff;
}

.site-footer p {
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.72);
}

.footer-links {
  align-items: center;
  color: rgba(255, 255, 255, 0.78);
}

@media (max-width: 980px) {
  .hero {
    min-height: auto;
    padding-top: 58px;
    padding-bottom: 420px;
  }

  .hero-phone {
    width: 210px;
    min-width: 0;
  }

  .phone-main {
    right: 8%;
    top: auto;
    bottom: 48px;
    width: 230px;
  }

  .phone-second {
    left: 8%;
    right: auto;
    bottom: 22px;
  }

  .phone-third {
    display: none;
  }

  .intro,
  .showcase,
  .download,
  .privacy {
    grid-template-columns: 1fr;
  }

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

  .qr-card {
    justify-self: start;
  }
}

@media (max-width: 680px) {
  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
  }

  .nav-links {
    width: 100%;
    gap: 14px;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .hero {
    display: block;
    padding-bottom: 40px;
  }

  h1 {
    font-size: 56px;
  }

  .hero-subtitle {
    font-size: 18px;
  }

  .hero-media {
    position: relative;
    inset: auto;
    height: 420px;
    margin-top: 24px;
  }

  .hero-phone {
    width: 210px;
  }

  .phone-main {
    top: 28px;
    right: 4px;
    bottom: auto;
    width: 218px;
    z-index: 3;
  }

  .phone-second {
    top: 58px;
    left: 0;
    right: auto;
    bottom: auto;
    width: 210px;
    z-index: 2;
  }

  .feature-grid,
  .screen-strip {
    grid-template-columns: 1fr;
  }

  .site-footer {
    flex-direction: column;
  }
}