:root {
  --ink: #12181c;
  --ink-2: #3d4a52;
  --ink-3: #6b7a83;
  --line: #dfe5e8;
  --bg: #f6f8f9;
  --panel: #ffffff;
  --primary: #0b6e78;
  --primary-ink: #ffffff;
  --warn: #a85b00;
  --radius: 10px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 15px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 24px;
}

.topbar {
  background: #0e1a1d;
  color: #e8eef0;
  position: sticky;
  top: 0;
  z-index: 10;
}

.topbar .wrap {
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: inherit;
  text-decoration: none;
  font-weight: 650;
  letter-spacing: .06em;
  font-size: 14px;
}

.brand svg { color: #4fb3bd; }

.nav { display: flex; gap: 20px; }

.nav a {
  color: #b9c7cc;
  text-decoration: none;
  font-size: 13px;
  letter-spacing: .04em;
}

.nav a:hover { color: #fff; }

.hero {
  padding: 72px 0 48px;
  border-bottom: 1px solid var(--line);
}

.hero h1 {
  margin: 0 0 18px;
  font-size: 34px;
  line-height: 1.35;
  letter-spacing: -.01em;
  font-weight: 700;
}

.lede {
  margin: 0;
  max-width: 620px;
  color: var(--ink-2);
  font-size: 16px;
}

.apps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
  padding: 40px 0;
}

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 22px 20px;
  display: flex;
  flex-direction: column;
}

.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.card h2 {
  margin: 0;
  font-size: 17px;
  font-weight: 650;
}

.card p {
  margin: 0 0 10px;
  color: var(--ink-2);
  font-size: 14px;
}

.card .meta {
  color: var(--ink-3);
  font-size: 12.5px;
  letter-spacing: .02em;
}

.badge {
  flex: none;
  font-size: 11.5px;
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--ink-3);
  background: #f2f5f6;
  white-space: nowrap;
}

.badge-live {
  color: var(--primary);
  border-color: #b9dade;
  background: #eaf5f6;
}

.btn {
  margin-top: auto;
  align-self: flex-start;
  display: inline-block;
  padding: 8px 16px;
  border-radius: 8px;
  background: var(--primary);
  color: var(--primary-ink);
  text-decoration: none;
  font-size: 13.5px;
  font-weight: 600;
}

.btn:hover { background: #095a62; }

.btn-disabled {
  background: #e8edee;
  color: var(--ink-3);
  cursor: not-allowed;
}

.about {
  border-top: 1px solid var(--line);
  padding: 40px 0 56px;
  max-width: 720px;
}

.about h2 {
  font-size: 15px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin: 0 0 14px;
}

.about p { margin: 0 0 12px; color: var(--ink-2); }

.footer {
  background: #0e1a1d;
  color: #9fb0b6;
  font-size: 12.5px;
}

.footer .wrap {
  padding-top: 20px;
  padding-bottom: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  align-items: center;
  justify-content: space-between;
}

.footer p { margin: 0; }

.footer a { color: #b9c7cc; text-decoration: none; }

.footer a:hover { color: #fff; }

@media (max-width: 640px) {
  .hero { padding: 48px 0 36px; }
  .hero h1 { font-size: 26px; }
  .nav { display: none; }
}