:root {
  --bg: #f7f5f2;
  --card: #fff;
  --text: #1c1917;
  --muted: #57534e;
  --line: #e7e5e4;
  --accent: #1d4ed8;
}
* { box-sizing: border-box; }
html { color-scheme: light; }
body {
  margin: 0;
  font: 17px/1.7 "SF Pro Text", "PingFang SC", "Hiragino Sans", "Noto Sans CJK", sans-serif;
  color: var(--text);
  background: var(--bg);
}
header {
  border-bottom: 1px solid var(--line);
  background: var(--card);
}
.wrap {
  max-width: 42rem;
  margin: 0 auto;
  padding: 1.25rem 1.25rem 3rem;
}
.brand {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  flex-wrap: wrap;
}
.brand a { color: inherit; text-decoration: none; font-weight: 650; }
.nav a {
  color: var(--muted);
  text-decoration: none;
  margin-left: 1rem;
  font-size: 0.92rem;
}
.nav a:hover, .nav a[aria-current="page"] { color: var(--accent); }
.langs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 1rem 0 1.5rem;
}
.langs button {
  appearance: none;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--text);
  border-radius: 999px;
  padding: 0.25rem 0.75rem;
  cursor: pointer;
  font: inherit;
  font-size: 0.85rem;
}
.langs button[aria-pressed="true"] {
  background: #1c1917;
  color: #fff;
  border-color: #1c1917;
}
h1 { font-size: 1.65rem; line-height: 1.3; margin: 0 0 0.35rem; }
.meta { color: var(--muted); margin: 0 0 1.5rem; }
h2 { font-size: 1.15rem; margin: 1.75rem 0 0.5rem; }
p, li { color: #292524; }
ul { padding-left: 1.2rem; }
a { color: var(--accent); }
.card-list { list-style: none; padding: 0; }
.card-list li {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  margin: 0 0 0.75rem;
  padding: 1rem 1.1rem;
}
.card-list a { font-weight: 650; text-decoration: none; }
.card-list p { margin: 0.35rem 0 0; color: var(--muted); font-size: 0.95rem; }
footer {
  margin-top: 2.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}
[hidden] { display: none !important; }

/* product intro & guide pages */
.hero { padding: 0.5rem 0 0; }
.hero h1 { font-size: 2rem; margin-bottom: 0.15rem; }
.tagline { font-size: 1.15rem; font-weight: 650; margin: 0 0 0.5rem; }
.lede { color: var(--muted); margin: 0 0 0.75rem; }
.cta-row { display: flex; flex-wrap: wrap; gap: 0.6rem; margin: 0.5rem 0 1rem; }
.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  border-radius: 10px;
  padding: 0.5rem 1rem;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
}
.btn.secondary {
  background: var(--card);
  color: var(--accent);
  border: 1px solid var(--line);
}
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 0.75rem;
}
.feature {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1rem 1.1rem;
}
.feature h3 { margin: 0 0 0.3rem; font-size: 1rem; }
.feature p { margin: 0; color: var(--muted); font-size: 0.95rem; }
.shots {
  display: flex;
  gap: 0.75rem;
  overflow-x: auto;
  padding: 0.25rem 0 0.5rem;
}
.shots img {
  height: 26rem;
  max-width: none;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: var(--card);
}
.shots img.guide { height: 22rem; }
.tip {
  background: #eef4ff;
  border: 1px solid #d6e4ff;
  border-radius: 10px;
  padding: 0.7rem 1rem;
  font-size: 0.95rem;
}
@media (max-width: 40rem) {
  .shots img { height: 20rem; }
  .shots img.guide { height: 17rem; }
}