:root {
  --rose: #be123c;
  --hot: #e11d48;
  --ink: #1f1316;
  --sub: #6b4a52;
  --bg: #fff5f6;
  --line: #fecdd3;
  --card: #ffffff;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.7 "Avenir Next", "PingFang SC", "Microsoft YaHei", sans-serif;
}
a { color: var(--rose); }

.frame {
  display: grid;
  grid-template-columns: 220px 1fr;
  min-height: 100vh;
}
.side {
  background: #1f1316;
  color: #ffe4e6;
  padding: 22px 18px;
}
.brand-app {
  display: flex;
  gap: 8px;
  align-items: center;
  color: #fff;
  text-decoration: none;
  font-weight: 800;
  margin-bottom: 18px;
}
.toc a {
  display: block;
  color: #fecdd3;
  text-decoration: none;
  padding: 8px 0;
  border-bottom: 1px solid #3f1f24;
  font-size: 14px;
}
.toc a.current { color: #fda4af; font-weight: 700; }

.main { padding: 0 0 40px; }
.split {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  background: linear-gradient(90deg, #fff 50%, #ffe4e6 50%);
}
.split > div { padding: 36px 32px; }
.split h1 { margin: 0 0 12px; font-size: 28px; }
.chooser {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.chooser a {
  display: block;
  text-decoration: none;
  background: var(--rose);
  color: #fff;
  padding: 14px 12px;
  font-weight: 700;
  text-align: center;
}
.chooser a.k2 { background: #111; }
.chooser a.k3 { background: #44403c; }
.chooser a.k4 { background: #047857; }

.chunk {
  width: min(860px, calc(100% - 48px));
  margin: 22px auto;
  background: var(--card);
  border: 1px solid var(--line);
  padding: 22px;
}
.chunk h2 { margin: 0 0 10px; font-size: 21px; color: var(--rose); }
.pick {
  width: 100%;
  border-collapse: collapse;
}
.pick th, .pick td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; }
.pick th { background: #ffe4e6; }
.faq-app { margin-top: 12px; }
.faq-app h3 { font-size: 16px; margin: 12px 0 4px; }
.faq-app p { margin: 0; color: var(--sub); }

.base {
  grid-column: 1 / -1;
  background: #1f1316;
  color: #fecdd3;
  padding: 20px 28px;
  font-size: 13px;
}
.base a { color: #fda4af; margin-right: 12px; }
.ok { color: #86efac; }

@media (max-width: 900px) {
  .frame { grid-template-columns: 1fr; }
  .split { grid-template-columns: 1fr; background: #fff; }
  .chooser { grid-template-columns: 1fr; }
}