:root {
  --bg: #f8fafc;
  --card: #ffffff;
  --text: #111827;
  --muted: #6b7280;
  --primary: #2563eb;
  --border: #e5e7eb;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Inter", sans-serif;
  color: var(--text);
  background: var(--bg);
}

.container {
  width: min(1080px, 92%);
  margin: 0 auto;
}

.topbar {
  background: #fff;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
}

.topbar-inner {
  min-height: 68px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand { font-weight: 700; text-decoration: none; color: inherit; }
nav { display: flex; gap: 16px; }
nav a { color: var(--muted); text-decoration: none; }

.yang {
  margin: 36px 0;
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--card);
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 20px;
}

.app-icon {
  width: 110px;
  height: 110px;
  border-radius: 20px;
  object-fit: cover;
}

.eyebrow {
  color: var(--primary);
  font-weight: 600;
  margin: 0;
}

h1 { margin: 8px 0 10px; }
.lead { color: var(--muted); max-width: 68ch; }

.btn {
  margin-top: 12px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary);
  color: #fff;
  text-decoration: none;
  padding: 10px 16px;
  border-radius: 10px;
  font-weight: 600;
}

section {
  margin: 28px 0;
}

h2 { margin-bottom: 14px; }

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.feature-grid article {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px;
}

.feature-grid i {
  font-size: 1.3rem;
  color: var(--primary);
}

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

.shot-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.shot-grid img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  border-radius: 12px;
  border: 1px solid var(--border);
}

.foot {
  margin-top: 40px;
  background: #fff;
  border-top: 1px solid var(--border);
}

.foot-inner {
  min-height: 66px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.foot a { color: var(--primary); text-decoration: none; }

@media (max-width: 860px) {
  .yang { grid-template-columns: 1fr; }
  .feature-grid,
  .shot-grid { grid-template-columns: 1fr; }
  .shot-grid img { height: 220px; }
}