:root {
  --bg: #f3f1ea;
  --ink: #1d1e20;
  --muted: #5e6168;
  --line: #ddd8cc;
  --card: #fffdf8;
  --accent: #0f87cc;
  --accent-ink: #ffffff;
  --desktop: #e7e4db;
  color-scheme: light;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    radial-gradient(900px 420px at 90% -10%, #d7ecf8 0%, transparent 60%),
    var(--bg);
  color: var(--ink);
  font: 17px/1.6 "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}
img { max-width: 100%; display: block; }
a { color: var(--accent); }
code {
  font-family: Consolas, "Cascadia Mono", monospace;
  font-size: 0.92em;
}

.top {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 14px 7vw;
  background: color-mix(in srgb, var(--bg) 88%, white);
  border-bottom: 1px solid transparent;
  backdrop-filter: blur(10px);
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: inherit;
  font-weight: 650;
  text-decoration: none;
  letter-spacing: -0.02em;
}
.nav { display: flex; gap: 22px; margin-right: auto; }
.nav a, .foot a { color: var(--muted); text-decoration: none; }
.nav a:hover, .foot a:hover { color: var(--ink); }
.nav-store {
  color: var(--accent);
  text-decoration: none;
  font-weight: 650;
}

.hero, .section, .store, .foot { padding-left: 7vw; padding-right: 7vw; }
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(240px, 320px);
  gap: 48px;
  align-items: center;
  padding-top: 64px;
  padding-bottom: 28px;
}
.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
}
h1, h2, h3 { letter-spacing: -0.03em; line-height: 1.2; }
h1 { margin: 0 0 16px; font-size: clamp(40px, 6vw, 68px); font-weight: 650; }
h2 { margin: 0 0 10px; font-size: clamp(28px, 4vw, 40px); }
h3 { margin: 14px 0 6px; font-size: 20px; }
.lede, .section-head p { color: var(--muted); max-width: 62ch; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.button {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--card);
  color: var(--ink);
  text-decoration: none;
}
.button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.button:hover { transform: translateY(-1px); }

.device {
  margin: 0;
  padding: 12px 12px 16px;
  background: #24262b;
  border-radius: 28px;
  box-shadow: 0 24px 50px rgba(36, 38, 43, 0.18);
}
.device img { border-radius: 16px; width: 100%; height: auto; }
.specs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin: 28px 7vw 10px;
  padding: 0;
  list-style: none;
}
.specs li, .hardware div, .app-grid li {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
}
.specs li { padding: 16px 18px; }
.specs strong { display: block; font-size: 22px; }
.specs span { color: var(--muted); }

.section { padding-top: 72px; }
.shots {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
  margin-top: 28px;
}
.app-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}
.app-grid li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
}
.app-grid img {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--desktop);
}
.app-grid span { font-weight: 650; }
.also { color: var(--muted); margin: 16px 0 0; }

.store {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  margin: 48px 7vw 0;
  padding: 28px 32px;
  background: #17324a;
  color: #f4f7fb;
  border-radius: 24px;
}
.store h2 { margin: 0 0 6px; color: inherit; }
.store p { margin: 0; color: inherit; }
.store a { color: #b7e3fb; }
.store .button.primary { background: #f4f7fb; color: #17324a; border-color: #f4f7fb; }

.hardware {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 28px 0 0;
}
.hardware div { padding: 16px 18px; }
.hardware dt { font-weight: 700; }
.hardware dd { margin: 4px 0 0; color: var(--muted); }
#hardware { padding-bottom: 48px; }
.foot {
  display: flex;
  gap: 18px;
  align-items: center;
  padding-top: 18px;
  padding-bottom: 28px;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

@media (max-width: 900px) {
  .top { flex-wrap: wrap; gap: 10px 18px; }
  .nav { order: 3; width: 100%; margin-right: 0; }
  .hero, .shots, .app-grid, .hardware, .specs { grid-template-columns: 1fr 1fr; }
  .hero { padding-top: 36px; }
  .store { flex-direction: column; align-items: flex-start; margin-top: 36px; }
}
@media (max-width: 640px) {
  .hero, .shots, .app-grid, .hardware, .specs { grid-template-columns: 1fr; }
  .top { padding-left: 20px; padding-right: 20px; }
  .hero, .section, .store, .foot, .specs { margin-left: 0; margin-right: 0; }
  .hero, .section, .foot { padding-left: 20px; padding-right: 20px; }
  .specs { margin-left: 20px; margin-right: 20px; }
  .store { margin-left: 20px; margin-right: 20px; padding: 24px; }
  h1 { font-size: 36px; }
}