/* 第5套：石板对照台账。表头先行，栅格分栏，和卡片堆叠/深色控制台不是同一骨架。 */
:root {
  --slate: #334155;
  --slate-deep: #1e293b;
  --amber: #d97706;
  --amber-soft: #f59e0b;
  --cream: #fffbeb;
  --card: #fffdf6;
  --ink: #1c1917;
  --muted: #57534e;
  --line: #e7e5e4;
  --ok: #3f6212;
  --warn: #9a3412;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: auto;
}

body.slate-page {
  margin: 0;
  background: var(--cream);
  color: var(--ink);
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.75;
}

a {
  color: var(--amber);
}

img,
svg {
  display: block;
}

.amber-bar {
  background: var(--slate);
  color: var(--cream);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.25rem;
  padding: 0.85rem 6vw;
  border-bottom: 4px solid var(--amber);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--cream);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand svg {
  width: 28px;
  height: 28px;
  color: var(--amber-soft);
}

.pin-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 0.9rem;
}

.pin-nav a {
  color: #fde68a;
  text-decoration: none;
  font-size: 0.92rem;
  border-bottom: 1px solid transparent;
}

.pin-nav a:hover,
.pin-nav a:focus {
  border-bottom-color: var(--amber-soft);
}

.hero-brief {
  padding: 1.6rem 6vw 1rem;
  max-width: 920px;
}

.hero-brief h1 {
  margin: 0 0 0.8rem;
  font-size: clamp(1.6rem, 3vw, 2.15rem);
  color: var(--slate-deep);
  line-height: 1.35;
}

.hero-brief p {
  margin: 0 0 0.7rem;
  color: var(--muted);
  max-width: 46rem;
}

.trio-caption {
  display: grid;
  grid-template-columns: 1.1fr 1fr 1fr 1fr;
  margin: 0 6vw 1.4rem;
  background: var(--slate);
  color: var(--cream);
  border: 1px solid var(--slate-deep);
}

.trio-caption span {
  padding: 0.7rem 0.85rem;
  font-weight: 700;
  border-left: 1px solid #475569;
  text-align: center;
}

.trio-caption span:first-child {
  border-left: 0;
  text-align: left;
  color: #fde68a;
}

.sheet-block,
.skill-block,
.decide-block,
.swap-block,
.cost-block,
.mix-block,
.bound-block,
.ask-block {
  padding: 1.6rem 6vw 2rem;
}

.sheet-block h2,
.skill-block h2,
.decide-block h2,
.swap-block h2,
.cost-block h2,
.mix-block h2,
.bound-block h2,
.ask-block h2 {
  margin: 0 0 0.85rem;
  color: var(--slate-deep);
  font-size: 1.35rem;
  border-left: 6px solid var(--amber);
  padding-left: 0.7rem;
}

.lead {
  margin: 0 0 1rem;
  color: var(--muted);
  max-width: 50rem;
}

.compare-grid {
  width: 100%;
  border-collapse: collapse;
  background: var(--card);
  font-size: 0.95rem;
}

.compare-grid th,
.compare-grid td {
  border: 1px solid var(--line);
  padding: 0.7rem 0.75rem;
  vertical-align: top;
  text-align: left;
}

.compare-grid thead th {
  background: var(--slate);
  color: var(--cream);
}

.compare-grid tbody th {
  background: #f5f5f4;
  color: var(--slate);
  width: 18%;
}

.compare-grid tbody tr:nth-child(even) td {
  background: #fff7ed;
}

.skill-trio,
.mix-trio {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.skill-card,
.mix-card,
.decide-card,
.cost-col {
  background: var(--card);
  border: 1px solid var(--line);
  border-top: 4px solid var(--amber);
  padding: 1rem 1.05rem 1.1rem;
}

.skill-card h3,
.mix-card h3,
.decide-card h3,
.cost-col h3 {
  margin: 0.55rem 0 0.45rem;
  font-size: 1.05rem;
  color: var(--slate-deep);
}

.skill-card p,
.mix-card p,
.decide-card p,
.cost-col p,
.swap-step p,
.bound-strip p,
.ask-block p {
  margin: 0 0 0.55rem;
  color: var(--muted);
}

.skill-card svg,
.mix-card svg,
.decide-card svg {
  width: 36px;
  height: 36px;
  color: var(--amber);
}

.decide-quad {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.swap-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.75rem;
  counter-reset: swap;
}

.swap-step {
  background: var(--card);
  border: 1px dashed #d6d3d1;
  padding: 0.9rem;
  position: relative;
}

.swap-step::before {
  counter-increment: swap;
  content: counter(swap);
  display: inline-block;
  width: 1.7rem;
  height: 1.7rem;
  line-height: 1.7rem;
  text-align: center;
  background: var(--amber);
  color: #fff;
  font-weight: 700;
  margin-bottom: 0.45rem;
}

.cost-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.cost-col.is-wrong {
  border-top-color: var(--warn);
}

.cost-col.is-fit {
  border-top-color: var(--ok);
}

.bound-strip {
  background: var(--slate);
  color: #e2e8f0;
  padding: 1.4rem 6vw 1.8rem;
}

.bound-strip h2 {
  color: #fde68a;
  border-left-color: var(--amber);
}

.bound-strip p {
  color: #cbd5e1;
  max-width: 52rem;
}

.ask-block details {
  background: var(--card);
  border: 1px solid var(--line);
  margin-bottom: 0.65rem;
  padding: 0.55rem 0.85rem;
}

.ask-block summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--slate-deep);
}

.ask-block details p {
  margin: 0.55rem 0 0.35rem;
}

.foot-slate {
  background: var(--slate-deep);
  color: #cbd5e1;
  padding: 1.4rem 6vw 1.6rem;
  font-size: 0.92rem;
}

.foot-slate p {
  margin: 0 0 0.45rem;
  max-width: 48rem;
}

.foot-slate p:last-child {
  margin-top: 0.8rem;
  color: #94a3b8;
}

@media (max-width: 900px) {
  .trio-caption,
  .skill-trio,
  .mix-trio,
  .decide-quad,
  .swap-steps,
  .cost-pair {
    grid-template-columns: 1fr;
  }

  .compare-grid {
    display: block;
    overflow-x: auto;
  }
}