:root {
  --indigo: #312e81;
  --indigo-2: #4338ca;
  --blush: #fb7185;
  --frost: #f8fafc;
  --card: #ffffff;
  --ink: #1e1b4b;
  --mute: #475569;
  --line: #e2e8f0;
  --max: 1140px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--frost);
  color: var(--ink);
  font-family: "Trebuchet MS", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.64;
}

.dock {
  background: var(--indigo);
  color: #e0e7ff;
  position: sticky;
  top: 0;
  z-index: 18;
}
.dock-row {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0.8rem 1.1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
}
.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: #fff;
  text-decoration: none;
  font-weight: 800;
}
.links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.4rem 0.75rem;
}
.links a {
  color: #c7d2fe;
  text-decoration: none;
  font-size: 0.82rem;
}
.links a:hover { color: #fda4af; }

.stage {
  max-width: var(--max);
  margin: 0 auto;
  padding: 2.1rem 1.1rem 1.3rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.4rem;
  align-items: start;
}
.stage h1 {
  margin: 0 0 0.8rem;
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  line-height: 1.28;
}
.stage p {
  margin: 0 0 0.65rem;
  color: var(--mute);
}

.panes {
  background: var(--indigo);
  border-radius: 14px;
  padding: 0.85rem;
  min-height: 230px;
}
.pane {
  background: #fff;
  border-radius: 10px;
  padding: 0.55rem 0.7rem;
  margin-bottom: 0.45rem;
  font-size: 0.78rem;
}
.pane:last-child { margin-bottom: 0; }
.pane em {
  font-style: normal;
  color: var(--blush);
  font-weight: 700;
  float: right;
}
.bub {
  display: inline-block;
  background: #eef2ff;
  border-radius: 10px;
  padding: 0.22rem 0.5rem;
  margin: 0.18rem 0.15rem 0 0;
  color: var(--indigo);
}

.band {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.85rem 1.1rem;
}
.band h2 {
  margin: 0 0 0.65rem;
  font-size: 1.32rem;
}
.intro {
  margin: 0 0 1.05rem;
  color: var(--mute);
  max-width: 46rem;
}

.jam-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 0.8rem;
}
.jam-row article {
  background: var(--card);
  border-radius: 12px;
  padding: 1rem 1rem 1.05rem;
  border-top: 6px solid var(--blush);
  box-shadow: 0 8px 0 rgba(49, 46, 129, 0.06);
}
.jam-row h3 { margin: 0.45rem 0 0.4rem; font-size: 1rem; }
.jam-row p { margin: 0 0 0.4rem; color: var(--mute); font-size: 0.9rem; }

.spread {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}
.spread article {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 0.75rem;
  background: var(--card);
  padding: 0.95rem;
  border-radius: 12px;
  border: 1px solid var(--line);
}
.spread .mark {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: #e0e7ff;
  color: var(--indigo-2);
  display: flex;
  align-items: center;
  justify-content: center;
}
.spread h3 { margin: 0 0 0.35rem; font-size: 1rem; }
.spread p { margin: 0 0 0.35rem; color: var(--mute); font-size: 0.88rem; }

.vs-sheet {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  background: var(--card);
  border-radius: 12px;
  overflow: hidden;
  font-size: 0.9rem;
}
.vs-sheet th,
.vs-sheet td {
  padding: 0.7rem 0.75rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}
.vs-sheet th { background: var(--indigo); color: #fff; }
.vs-sheet tr:last-child td { border-bottom: 0; }

.move-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.55rem;
}
.move-steps article {
  background: var(--card);
  border-radius: 12px;
  padding: 0.9rem 0.8rem;
  border: 1px solid var(--line);
}
.n {
  width: 1.8rem;
  height: 1.8rem;
  border-radius: 50%;
  background: var(--blush);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  margin-bottom: 0.45rem;
}
.move-steps h3 { margin: 0 0 0.35rem; font-size: 0.95rem; }
.move-steps p { margin: 0; color: var(--mute); font-size: 0.86rem; }

.miss-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.85rem;
}
.miss-pair article {
  background: #fff;
  padding: 1.1rem;
  border-radius: 12px;
  border: 1px solid var(--line);
}
.miss-pair h3 { margin: 0 0 0.45rem; }
.miss-pair p { margin: 0 0 0.45rem; color: var(--mute); }

.layout-wire {
  background: var(--indigo);
  border-radius: 16px;
  padding: 1rem;
  display: grid;
  grid-template-columns: 0.38fr 0.62fr;
  gap: 0.65rem;
  min-height: 210px;
}
.wire-list,
.wire-thread {
  background: #eef2ff;
  border-radius: 10px;
  padding: 0.7rem;
  color: var(--indigo);
  font-size: 0.8rem;
}
.wire-list b,
.wire-thread b { display: block; margin-bottom: 0.45rem; }
.row {
  background: #fff;
  border-radius: 8px;
  padding: 0.35rem 0.5rem;
  margin-bottom: 0.35rem;
}
.row.on { outline: 2px solid var(--blush); }
.msg {
  background: #fff;
  border-radius: 8px;
  padding: 0.4rem 0.55rem;
  margin-bottom: 0.35rem;
  max-width: 90%;
}
.msg.me { margin-left: auto; background: #c7d2fe; }

.back-phone {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.65rem;
}
.back-phone article {
  background: var(--card);
  border-radius: 12px;
  padding: 0.9rem;
  border-bottom: 5px solid var(--indigo);
}
.back-phone h3 { margin: 0 0 0.35rem; font-size: 0.95rem; }
.back-phone p { margin: 0; color: var(--mute); font-size: 0.86rem; }

.faq-block details {
  background: var(--card);
  border-radius: 10px;
  margin-bottom: 0.5rem;
  border: 1px solid var(--line);
}
.faq-block summary {
  cursor: pointer;
  padding: 0.8rem 1rem;
  font-weight: 700;
  color: var(--indigo);
}
.faq-block p {
  margin: 0;
  padding: 0 1rem 0.9rem;
  color: var(--mute);
}

.endnote {
  background: #1e1b4b;
  color: #c7d2fe;
  padding: 1.5rem 1.1rem 1.8rem;
  font-size: 0.86rem;
}
.endnote div { max-width: var(--max); margin: 0 auto; }
.endnote p { margin: 0 0 0.4rem; }
.endnote .legal { color: #a5b4fc; margin-top: 0.55rem; }

@media (max-width: 900px) {
  .stage,
  .jam-row,
  .spread,
  .move-steps,
  .miss-pair,
  .layout-wire,
  .back-phone { grid-template-columns: 1fr; }
  .dock-row { flex-direction: column; align-items: flex-start; }
}