:root {
  --ice: #f0f9ff;
  --sky: #0c4a6e;
  --lime: #4d7c0f;
  --lime-2: #ecfccb;
  --ink: #111827;
  --card: #ffffff;
  --line: #bae6fd;
  --mute: #334155;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--ice);
  color: var(--ink);
  font-family: Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.62;
}

.skyhead {
  background: #fff;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 15;
}
.skyhead-row {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0.75rem 1.1rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1rem;
}
.mark {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--sky);
  text-decoration: none;
  font-weight: 800;
  font-size: 1.02rem;
}
.pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-left: auto;
}
.pills a {
  text-decoration: none;
  color: var(--sky);
  background: var(--ice);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.28rem 0.72rem;
  font-size: 0.8rem;
}
.pills a:hover {
  background: var(--lime);
  color: #fff;
  border-color: var(--lime);
}

.hero-band {
  background: linear-gradient(180deg, #e0f2fe 0%, var(--ice) 100%);
  padding: 2.2rem 1.1rem 1.4rem;
}
.hero-grid {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 1.5rem;
  align-items: start;
}
.hero-grid h1 {
  margin: 0 0 0.8rem;
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  color: var(--sky);
  line-height: 1.28;
}
.hero-grid p {
  margin: 0 0 0.65rem;
  color: var(--mute);
  max-width: 40rem;
}
.meter-col {
  background: #fff;
  border: 1px solid var(--line);
  padding: 1rem 1.05rem 1.15rem;
}
.meter-col h3 {
  margin: 0 0 0.7rem;
  font-size: 0.95rem;
  color: var(--sky);
}
.meter {
  margin-bottom: 0.85rem;
}
.meter b {
  display: block;
  font-size: 0.82rem;
  margin-bottom: 0.3rem;
}
.bar {
  height: 12px;
  background: #e2e8f0;
  overflow: hidden;
}
.bar i {
  display: block;
  height: 100%;
}
.bar.keep i { width: 72%; background: var(--lime); }
.bar.back i { width: 46%; background: #0369a1; }
.meter small { color: var(--mute); font-size: 0.78rem; }

.lane {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.9rem 1.1rem;
}
.lane.alt { background: #fff; }
.lane h2 {
  margin: 0 0 0.65rem;
  font-size: 1.32rem;
  color: var(--sky);
}
.blurb {
  margin: 0 0 1.1rem;
  color: var(--mute);
  max-width: 48rem;
}

.keep-row,
.back-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 0.85rem;
}
.keep-row article,
.back-row article {
  background: #fff;
  border: 1px solid var(--line);
  padding: 1rem 1rem 1.05rem;
  border-top: 5px solid var(--lime);
}
.back-row article { border-top-color: #0369a1; }
.ico-top {
  width: 42px;
  height: 42px;
  background: var(--lime-2);
  color: var(--lime);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.55rem;
}
.back-row .ico-top { background: #e0f2fe; color: #0369a1; }
.keep-row h3,
.back-row h3 { margin: 0 0 0.4rem; font-size: 1rem; }
.keep-row p,
.back-row p { margin: 0 0 0.45rem; color: var(--mute); font-size: 0.9rem; }

.fit-board {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  font-size: 0.91rem;
}
.fit-board th,
.fit-board td {
  border: 1px solid #7dd3fc;
  padding: 0.65rem 0.7rem;
  vertical-align: top;
  text-align: left;
}
.fit-board th {
  background: var(--sky);
  color: #fff;
}
.fit-board td:first-child {
  border-left: 4px solid var(--lime);
  font-weight: 650;
  width: 22%;
}

.q-blocks {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 0.8rem;
}
.q-blocks article {
  background: #fff;
  padding: 1.1rem 1rem;
  border: 1px dashed #7dd3fc;
}
.q-no {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--lime);
  line-height: 1;
  margin-bottom: 0.45rem;
}
.q-blocks h3 { margin: 0 0 0.4rem; font-size: 1rem; }
.q-blocks p { margin: 0 0 0.4rem; color: var(--mute); font-size: 0.9rem; }

.cost-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.9rem;
}
.cost-pair article {
  background: #fff;
  padding: 1.1rem;
  border: 1px solid var(--line);
}
.cost-pair h3 { margin: 0 0 0.45rem; color: var(--sky); }
.cost-pair p { margin: 0 0 0.5rem; color: var(--mute); }

.week-lane {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0.4rem;
}
.week-lane article {
  background: #fff;
  border: 1px solid var(--line);
  padding: 0.65rem 0.45rem 0.75rem;
  text-align: center;
  min-height: 8.5rem;
}
.week-lane strong {
  display: block;
  color: var(--sky);
  font-size: 0.82rem;
  margin-bottom: 0.35rem;
}
.week-lane p {
  margin: 0;
  font-size: 0.75rem;
  color: var(--mute);
  text-align: left;
}

.fact-pills {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: 0.65rem;
}
.fact-pills article {
  background: #fff;
  padding: 0.9rem;
  border-bottom: 4px solid var(--lime);
}
.fact-pills h3 { margin: 0 0 0.35rem; font-size: 0.95rem; }
.fact-pills p { margin: 0; color: var(--mute); font-size: 0.86rem; }

.qa-ol {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: qa;
}
.qa-ol li {
  background: #fff;
  border: 1px solid var(--line);
  padding: 0.9rem 1rem 1rem 3.4rem;
  margin-bottom: 0.55rem;
  position: relative;
  counter-increment: qa;
}
.qa-ol li::before {
  content: counter(qa);
  position: absolute;
  left: 0.85rem;
  top: 0.9rem;
  width: 1.7rem;
  height: 1.7rem;
  background: var(--sky);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
}
.qa-ol h3 { margin: 0 0 0.4rem; font-size: 1rem; }
.qa-ol p { margin: 0 0 0.4rem; color: var(--mute); }

.footline {
  background: var(--sky);
  color: #bae6fd;
  padding: 1.5rem 1.1rem 1.8rem;
  font-size: 0.86rem;
}
.footline div { max-width: var(--max); margin: 0 auto; }
.footline p { margin: 0 0 0.4rem; }
.footline .legal { color: #7dd3fc; margin-top: 0.55rem; }

@media (max-width: 920px) {
  .hero-grid,
  .keep-row,
  .back-row,
  .q-blocks,
  .cost-pair,
  .week-lane,
  .fact-pills { grid-template-columns: 1fr; }
  .pills { margin-left: 0; }
}