:root {
  --accent: #0ea5e9;
  --ink: #0f172a;
  --muted: #64748b;
  --line: #e2e8f0;
  --bg: #f8fafc;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: #1e293b;
  background: var(--bg);
}
a { color: #0369a1; }
.top {
  background: #fff;
  border-bottom: 1px solid var(--line);
}
.top .inner, main, .foot {
  max-width: 880px;
  margin: 0 auto;
  padding-left: 16px;
  padding-right: 16px;
}
.top .inner {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: baseline;
  padding-top: 14px;
  padding-bottom: 14px;
}
.brand {
  color: var(--ink);
  font-weight: 700;
  text-decoration: none;
}
.brand b { color: var(--accent); font-weight: 700; }
.top-app { color: var(--muted); font-size: 0.92rem; }
main { padding-top: 24px; padding-bottom: 12px; }
h1 {
  font-size: 1.5rem;
  color: var(--ink);
  border-bottom: 2px solid var(--accent);
  padding-bottom: 10px;
  margin: 0 0 12px;
}
h2 { font-size: 1.08rem; color: #0369a1; margin: 28px 0 8px; }
.meta, .lead { color: var(--muted); }
.lead { color: #334155; }
ul { padding-left: 1.25em; }
li { margin: 6px 0; }
.note, form {
  background: #fff;
  border: 1px solid #bae6fd;
  border-radius: 12px;
  padding: 14px 16px;
  margin: 16px 0;
}
form { border-color: var(--line); }
label { display: block; font-weight: 600; margin: 12px 0 4px; }
input[type="email"], input[type="text"], textarea {
  width: 100%;
  font: inherit;
  padding: 10px 12px;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  background: #fff;
}
textarea { min-height: 96px; resize: vertical; }
.check { display: flex; gap: 8px; align-items: flex-start; font-weight: 400; margin-top: 12px; }
.check input { margin-top: 6px; }
button, .links a, .foot a {
  display: inline-block;
  text-decoration: none;
  border-radius: 8px;
  padding: 8px 12px;
}
button {
  margin-top: 14px;
  background: var(--accent);
  color: #fff;
  border: 0;
  font: inherit;
  cursor: pointer;
}
.links { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.links a, .foot a { background: #e0f2fe; }
.grid { display: grid; grid-template-columns: 1fr; gap: 12px; }
.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px 16px;
}
.card h2 { margin: 0 0 6px; color: var(--ink); font-size: 1.05rem; }
.pkg { color: var(--muted); font-size: 0.88rem; word-break: break-all; }
.foot {
  border-top: 1px solid var(--line);
  margin-top: 28px;
  padding-top: 16px;
  padding-bottom: 36px;
}
.foot p { color: var(--muted); font-size: 0.88rem; }
.ok { display: none; margin-top: 12px; color: #0369a1; }
@media (min-width: 760px) {
  .grid { grid-template-columns: 1fr 1fr; }
  h1 { font-size: 1.7rem; }
}