/* 第6套：选型驱动 · 深色卡片 · 薄荷强调 */
:root {
  --bg: #10141b;
  --card: #1a202b;
  --ink: #e8eef6;
  --muted: #9aa6b8;
  --mint: #3dcc9a;
  --mint-ink: #06281c;
  --line: #2c3544;
  --warn: #f0c36a;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.75;
  font-size: 16px;
}

.top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: min(980px, calc(100% - 28px));
  margin: 0 auto;
  padding: 20px 0 8px;
}
.brand {
  color: var(--mint);
  text-decoration: none;
  font-weight: 800;
  font-size: 22px;
  letter-spacing: 0.12em;
}
nav.appnav a {
  color: var(--muted);
  text-decoration: none;
  margin-left: 16px;
  font-size: 14px;
}
nav.appnav a.current { color: var(--mint); font-weight: 700; }

.hero {
  width: min(980px, calc(100% - 28px));
  margin: 18px auto 8px;
  background: linear-gradient(160deg, #1d2836, #141a22);
  border: 1px solid var(--line);
  padding: 32px 28px;
  border-radius: 16px;
}
.hero h1 { font-size: 30px; line-height: 1.32; margin-bottom: 12px; }
.hero .lead { color: var(--muted); margin-bottom: 18px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.chips span {
  border: 1px solid var(--line);
  color: var(--muted);
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--mint);
  color: var(--mint-ink);
  text-decoration: none;
  padding: 11px 18px;
  font-weight: 800;
  border-radius: 999px;
}
.btn-ghost {
  background: transparent;
  color: var(--mint);
  border: 1px solid var(--mint);
  margin-left: 8px;
}

.stack {
  width: min(980px, calc(100% - 28px));
  margin: 16px auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px 18px 16px;
}
.card.wide { grid-column: 1 / -1; }
.card h2 { font-size: 19px; margin-bottom: 10px; color: var(--mint); }
.card p + p { margin-top: 10px; }
.card ul, .card ol { margin: 8px 0 0 1.15em; color: var(--muted); }
.card li { margin: 5px 0; }

table.pick {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  margin-top: 8px;
}
table.pick th, table.pick td {
  border-bottom: 1px solid var(--line);
  padding: 8px 6px;
  text-align: left;
}
table.pick th { color: var(--mint); font-weight: 700; }

.faq { width: min(980px, calc(100% - 28px)); margin: 8px auto 20px; }
.faq h2 { color: var(--mint); margin-bottom: 10px; }
.faq article {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px 16px;
  margin: 10px 0;
}
.faq h3 { font-size: 16px; margin-bottom: 6px; }
.faq p { color: var(--muted); }

footer {
  width: min(980px, calc(100% - 28px));
  margin: 10px auto 48px;
  color: #7d8898;
  font-size: 12.5px;
  border-top: 1px solid var(--line);
  padding-top: 16px;
}
footer p { margin: 8px 0; }
footer a { color: var(--mint); }

svg.icon { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.8; }

@media (max-width: 720px) {
  .stack { grid-template-columns: 1fr; }
  .top { flex-direction: column; align-items: flex-start; gap: 10px; }
  nav.appnav a { margin-left: 0; margin-right: 12px; }
}