/* 第6套：窄栏卡片叠放，蓝紫选型流 */
:root {
  --blue: #3b5bdb;
  --violet: #7048e8;
  --ink: #212529;
  --muted: #495057;
  --bg: #f1f3f5;
  --card: #ffffff;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.75;
  font-size: 16px;
}

a { color: var(--blue); text-decoration: none; }
a:hover { color: var(--violet); }

.frame { width: min(860px, 94%); margin: 0 auto; }

.head {
  padding: 20px 0 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--violet);
  font-weight: 800;
  font-size: 20px;
  text-decoration: none;
}
.head nav a {
  margin-left: 14px;
  color: var(--muted);
  font-weight: 600;
  font-size: 14px;
}
.head nav a.active {
  color: #fff;
  background: var(--violet);
  padding: 4px 10px;
  border-radius: 999px;
}

.hero-card {
  background: linear-gradient(160deg, var(--blue), var(--violet));
  color: #fff;
  border-radius: 20px;
  padding: 32px 28px 28px;
  margin: 12px 0 18px;
}
.hero-card h1 { font-size: 26px; line-height: 1.4; margin-bottom: 12px; }
.hero-card .lead { opacity: 0.92; margin-bottom: 20px; }
.btn-round {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #fff;
  color: var(--violet);
  font-weight: 800;
  padding: 12px 22px;
  border-radius: 999px;
}
.btn-round:hover { color: var(--blue); }
.btn-ghost {
  display: inline-flex;
  margin-left: 8px;
  color: #fff;
  border: 1px solid rgba(255,255,255,0.6);
  padding: 11px 18px;
  border-radius: 999px;
  font-weight: 700;
}

.card {
  background: var(--card);
  border-radius: 16px;
  padding: 22px 22px 16px;
  margin-bottom: 14px;
  box-shadow: 0 6px 18px rgba(33, 37, 41, 0.05);
  border-left: 6px solid var(--blue);
}
.card.alt { border-left-color: var(--violet); }
.card h2 { font-size: 19px; margin-bottom: 10px; }
.card p { margin-bottom: 10px; }
.card ul, .card ol { margin: 0 0 10px 1.2em; }

.pick {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin: 10px 0 6px;
}
.pick a {
  display: block;
  background: #eef2ff;
  border-radius: 12px;
  padding: 14px;
  color: var(--ink);
  font-weight: 700;
}
.pick a span { display: block; font-weight: 400; color: var(--muted); font-size: 13px; margin-top: 4px; }
.pick a:hover { background: #e5dbff; }

table.sel {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  margin: 8px 0 12px;
}
table.sel th, table.sel td {
  border-bottom: 1px solid #e9ecef;
  padding: 8px 6px;
  text-align: left;
}

.faq-item { padding: 10px 0; border-bottom: 1px solid #edf2f7; }
.faq-item h3 { font-size: 16px; margin-bottom: 6px; }

footer {
  padding: 18px 0 32px;
  color: var(--muted);
  font-size: 12px;
}
footer .safe { color: #2b8a3e; margin-bottom: 8px; }

@media (max-width: 640px) {
  .head { flex-direction: column; align-items: flex-start; gap: 10px; }
  .head nav a { margin-left: 0; margin-right: 10px; }
  .pick { grid-template-columns: 1fr; }
  .btn-ghost { margin-left: 0; margin-top: 8px; }
}