:root {
  --steel: #2c5f8a;
  --steel-d: #1d4466;
  --amber: #d4a017;
  --bg: #f4f6f8;
  --ink: #1e2a36;
  --sub: #5a6b7a;
  --line: #d3dbe3;
  --card: #fff;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: "Trebuchet MS", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.68;
  font-size: 15.5px;
}
a { color: var(--steel); text-decoration: none; }
a:hover { text-decoration: underline; }

.compact {
  background: var(--steel-d);
  color: #fff;
  border-bottom: 4px solid var(--amber);
}
.compact-in {
  width: min(1180px, calc(100% - 28px));
  margin: 0 auto;
  min-height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand-sm {
  color: #fff;
  font-weight: 800;
  font-size: 18px;
}
.brand-sm:hover { text-decoration: none; }
.sel-nav a {
  color: #c5d6e6;
  margin-left: 14px;
  font-size: 14px;
  padding: 4px 10px;
}
.sel-nav a.is-on { background: var(--amber); color: #1e2a36; font-weight: 700; }

.shell { width: min(1180px, calc(100% - 28px)); margin: 18px auto 40px; }

.hero-pick {
  background: var(--card);
  border: 1px solid var(--line);
  padding: 22px 24px;
  display: grid;
  grid-template-columns: 1.4fr 0.8fr;
  gap: 20px;
}
.hero-pick h1 { font-size: 26px; line-height: 1.4; margin-bottom: 10px; }
.hero-pick p { color: var(--sub); margin-bottom: 14px; }
.pick-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.btn-am {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--amber);
  color: #1e2a36;
  font-weight: 700;
  padding: 10px 16px;
}
.btn-am:hover { filter: brightness(0.95); text-decoration: none; }
.btn-st {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--steel);
  color: #fff;
  padding: 10px 16px;
}
.ifbox {
  background: #eef4f9;
  border: 1px dashed var(--steel);
  padding: 14px 14px;
  font-size: 14px;
}
.ifbox strong { display: block; margin-bottom: 6px; color: var(--steel-d); }

.picker {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin: 16px 0;
}
.choice {
  background: var(--card);
  border: 1px solid var(--line);
  padding: 14px 14px 16px;
}
.choice h2 { font-size: 16px; margin-bottom: 8px; color: var(--steel-d); }
.choice p { font-size: 13.5px; color: var(--sub); }

.choice-detail {
  background: var(--card);
  border: 1px solid var(--line);
  padding: 18px 20px;
  margin-bottom: 12px;
}
.choice-detail h2 { font-size: 20px; margin-bottom: 8px; }

.matrix-sel {
  width: 100%;
  border-collapse: collapse;
  background: var(--card);
  margin: 12px 0 16px;
  font-size: 14px;
}
.matrix-sel th, .matrix-sel td {
  border: 1px solid var(--line);
  padding: 9px 10px;
  text-align: left;
}
.matrix-sel th { background: var(--steel); color: #fff; }
.matrix-sel tr:nth-child(odd) td { background: #f7fafc; }

.combo, .faq-sel {
  background: var(--card);
  border: 1px solid var(--line);
  padding: 18px 20px;
  margin-bottom: 12px;
}
.combo h2, .faq-sel h2 { font-size: 20px; margin-bottom: 8px; }
.faq-sel h3 { font-size: 16px; margin: 12px 0 6px; color: var(--steel-d); }

.foot-st {
  background: #152433;
  color: #b8c6d2;
  padding: 20px 0;
  font-size: 13px;
}
.foot-st .in { width: min(1180px, calc(100% - 28px)); margin: 0 auto; }
.foot-st a { color: #b8c6d2; margin-right: 12px; }
.foot-st a.is-on { color: var(--amber); }
.safe { color: #f0e2b0; margin: 8px 0; }

@media (max-width: 900px) {
  .picker { grid-template-columns: 1fr 1fr; }
  .hero-pick { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .picker { grid-template-columns: 1fr; }
  .compact-in { flex-direction: column; padding: 8px 0; gap: 6px; }
}