:root {
  --ink: #172033;
  --muted: #667085;
  --line: #d9e1ef;
  --brand: #2f348f;
  --brand-deep: #20256f;
  --accent: #0f8f8f;
  --surface: #ffffff;
  --soft: #f5f7fb;
  --soft-2: #eef7f6;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--surface);
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.65;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
  padding: 0 7vw;
  border-bottom: 1px solid rgba(217, 225, 239, 0.85);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 700;
  white-space: nowrap;
}

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

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

nav a:hover,
footer a:hover {
  color: var(--brand);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.75fr);
  gap: 52px;
  align-items: center;
  min-height: calc(100vh - 72px);
  padding: 82px 7vw 72px;
  background:
    linear-gradient(135deg, rgba(47, 52, 143, 0.09), transparent 34%),
    linear-gradient(315deg, rgba(15, 143, 143, 0.11), transparent 36%),
    var(--soft);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  max-width: 760px;
  margin-bottom: 22px;
  font-size: clamp(38px, 7vw, 68px);
  line-height: 1.08;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.2;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 20px;
  line-height: 1.35;
}

.lead {
  max-width: 720px;
  color: var(--muted);
  font-size: 20px;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-weight: 700;
}

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

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

.button.secondary {
  background: #fff;
}

.app-card {
  width: min(100%, 380px);
  justify-self: end;
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 0 24px 70px rgba(23, 32, 51, 0.12);
}

.app-card img {
  width: 88px;
  height: 88px;
  margin-bottom: 22px;
}

.app-card h2 {
  margin-bottom: 4px;
  font-size: 30px;
}

.app-card p {
  color: var(--muted);
}

.app-card ul {
  display: grid;
  gap: 10px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.app-card li {
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--soft);
}

.section {
  padding: 82px 7vw;
}

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

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.feature-grid article,
.info-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.feature-grid article {
  min-height: 180px;
  padding: 26px;
}

.feature-grid p,
.split p,
.privacy p,
.privacy li {
  color: var(--muted);
}

.screenshots {
  background: var(--soft);
}

.screen-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 22px;
}

.screen-grid img {
  display: block;
  width: 100%;
  max-height: 720px;
  object-fit: cover;
  object-position: top;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 16px 48px rgba(23, 32, 51, 0.12);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(300px, 1.1fr);
  gap: 42px;
  align-items: start;
  background: var(--soft-2);
}

.info-panel {
  padding: 28px;
}

dl {
  display: grid;
  gap: 22px;
  margin: 0;
}

dt {
  margin-bottom: 4px;
  color: var(--ink);
  font-weight: 700;
}

dd {
  margin: 0;
  color: var(--muted);
}

dd a,
.privacy a,
.site-footer a {
  color: var(--brand);
  font-weight: 700;
}

.privacy {
  max-width: 980px;
  margin: 0 auto;
}

.standalone {
  min-height: calc(100vh - 176px);
}

.standalone h1 {
  max-width: 840px;
  margin-bottom: 24px;
  font-size: clamp(36px, 6vw, 56px);
}

.support-hero {
  min-height: calc(100vh - 176px);
}

.privacy h3 {
  margin-top: 28px;
}

.updated {
  margin-top: 30px;
  font-size: 14px;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 26px 7vw;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.site-footer div {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
}

.site-footer img {
  width: 30px;
  height: 30px;
}

.site-footer p {
  margin: 0;
}

@media (max-width: 860px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
    padding: 16px 22px;
  }

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

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

  .screen-grid img {
    max-height: 620px;
  }

  .hero {
    min-height: auto;
    padding: 58px 22px 52px;
  }

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

  .section {
    padding: 58px 22px;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
    padding: 24px 22px;
  }
}

@media (min-width: 861px) and (max-width: 1180px) {
  .screen-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 520px) {
  h1 {
    font-size: 38px;
  }

  .lead {
    font-size: 17px;
  }

  .button {
    width: 100%;
  }

  .app-card {
    padding: 24px;
  }
}