.page-products {
  --tool-line: rgba(26, 21, 18, .16);
  --tool-line-soft: rgba(26, 21, 18, .28);
  --tool-dim: rgba(26, 21, 18, .68);
  --tool-night-line: rgba(244, 232, 208, .22);
  --tool-night-dim: rgba(251, 245, 230, .72);
  background-color: var(--c-cream);
  color: var(--c-brown);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
}

/* ---------- 首屏 ---------- */
.page-products .tool-hero {
  position: relative;
  padding: clamp(34px, 8vw, 92px) 0 clamp(26px, 6vw, 60px);
  background:
    radial-gradient(120% 90% at 8% 0%, rgba(8, 42, 51, .14), rgba(8, 42, 51, 0) 62%),
    linear-gradient(180deg, rgba(255, 107, 53, .07), rgba(255, 107, 53, 0) 46%),
    var(--c-cream);
  border-bottom: 2px solid var(--tool-line);
}

.page-products .tool-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 5vw, 46px);
}

.page-products .tool-hero__lead {
  min-width: 0;
}

.page-products .tool-hero__kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--c-rust);
}

.page-products .tool-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(42px, 12vw, 96px);
  line-height: .92;
  letter-spacing: -.02em;
  color: var(--c-night);
}

.page-products .tool-hero__title-tail {
  display: block;
  margin-top: .34em;
  font-weight: 700;
  font-size: .38em;
  line-height: 1.15;
  letter-spacing: .01em;
  color: var(--c-rust);
}

.page-products .tool-hero__lede {
  margin: 20px 0 0;
  max-width: 48ch;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.78;
  color: var(--tool-dim);
}

.page-products .tool-jump {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  margin-top: 28px;
}

.page-products .tool-jump__item {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 11px 13px;
  background: var(--c-paper);
  border: 2px solid var(--tool-line-soft);
  color: var(--c-brown);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  text-decoration: none;
  transition: transform .18s var(--ease), box-shadow .18s var(--ease), border-color .18s var(--ease);
}

.page-products .tool-jump__num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 400;
  color: var(--c-rust);
}

.page-products .tool-jump__item:hover,
.page-products .tool-jump__item:focus-visible {
  transform: translate(-2px, -2px);
  border-color: var(--c-brown);
  box-shadow: 4px 4px 0 var(--c-shadow);
  outline: none;
}

.page-products .tool-jump__item:focus-visible {
  outline: 3px solid var(--c-signal);
  outline-offset: 2px;
}

.page-products .tool-readout {
  align-self: start;
  padding: 18px 18px 20px;
  background: var(--c-paper);
  border-top: 4px solid var(--c-night);
  box-shadow: var(--shadow-hard);
}

.page-products .tool-readout__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--c-night);
}

.page-products .tool-readout__list {
  margin: 0;
}

.page-products .tool-readout__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 9px 0;
  border-bottom: 1px dashed var(--tool-line-soft);
  font-family: var(--font-mono);
  font-size: 12.5px;
}

.page-products .tool-readout__row dt {
  color: var(--tool-dim);
}

.page-products .tool-readout__row dd {
  margin: 0;
  font-weight: 600;
  color: var(--c-rust);
}

.page-products .tool-readout__note {
  margin: 14px 0 0;
  padding-left: 10px;
  border-left: 4px solid var(--c-signal);
  font-size: 12.5px;
  line-height: 1.66;
  color: var(--tool-dim);
}

/* ---------- 章节通用 ---------- */
.page-products .tool-block {
  min-width: 0;
  padding: clamp(40px, 7vw, 84px) 0;
  border-top: 2px solid var(--tool-line);
}

.page-products .tool-block__head {
  max-width: 62ch;
  margin-bottom: clamp(22px, 4vw, 40px);
}

.page-products .tool-block__head .section__title {
  margin-top: 6px;
}

.page-products .tool-block__head .lede {
  margin-top: 12px;
  color: var(--tool-dim);
}

.page-products .tool-block .media-frame {
  margin: 0;
}

.page-products .media-frame__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-products .tag-label {
  font-family: var(--font-mono);
  font-size: 12px;
}

/* ---------- 技能树总览 ---------- */
.page-products .tree {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 40px);
}

.page-products .tree__list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 18px;
  border-left: 2px dashed var(--tool-line-soft);
  display: grid;
  gap: 12px;
}

.page-products .tree-node {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-areas:
    "num name"
    "num desc"
    "num meta";
  column-gap: 14px;
  row-gap: 2px;
  padding: 15px 16px;
  background: var(--c-paper);
  border: 2px solid var(--c-brown);
  box-shadow: 4px 4px 0 var(--c-shadow);
  color: inherit;
  text-decoration: none;
  transition: transform .18s var(--ease), box-shadow .18s var(--ease), background-color .18s var(--ease);
}

.page-products .tree-node::before {
  content: "";
  position: absolute;
  left: -20px;
  top: 28px;
  width: 14px;
  height: 2px;
  background: var(--c-rust);
}

.page-products .tree-node:hover,
.page-products .tree-node:focus-visible {
  transform: translate(-3px, -3px);
  box-shadow: 7px 7px 0 var(--c-shadow);
  background: var(--c-cream);
  outline: none;
}

.page-products .tree-node:focus-visible {
  outline: 3px solid var(--c-signal);
  outline-offset: 2px;
}

.page-products .tree-node__num {
  grid-area: num;
  font-family: var(--font-mono);
  font-size: 22px;
  line-height: 1.1;
  color: var(--c-rust);
}

.page-products .tree-node__name {
  grid-area: name;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  color: var(--c-night);
}

.page-products .tree-node__desc {
  grid-area: desc;
  font-size: 14.5px;
  line-height: 1.66;
  color: var(--tool-dim);
}

.page-products .tree-node__meta {
  grid-area: meta;
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--c-deep);
}

/* ---------- 注册引导 ---------- */
.page-products .register__banner {
  margin: 0 0 clamp(20px, 3.5vw, 34px);
}

.page-products .steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-products .step {
  background: var(--c-paper);
  border: 2px solid var(--c-brown);
  box-shadow: 4px 4px 0 var(--c-shadow);
}

.page-products .step__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 13px 16px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  color: var(--c-night);
  transition: background-color .18s var(--ease);
}

.page-products .step__head::-webkit-details-marker {
  display: none;
}

.page-products .step__head:hover {
  background: rgba(255, 107, 53, .09);
}

.page-products .step__head:focus-visible {
  outline: 3px solid var(--c-signal);
  outline-offset: -3px;
}

.page-products .step__num {
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 12px;
  color: var(--c-rust);
}

.page-products .step__name {
  flex: 1 1 auto;
  min-width: 0;
}

.page-products .step__flag {
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 11px;
  letter-spacing: .06em;
  padding: 2px 7px;
  background: var(--c-cream);
  border: 1px solid var(--tool-line-soft);
  color: var(--c-deep);
}

.page-products .step__head::after {
  content: "+";
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 15px;
  color: var(--c-rust);
}

.page-products .step[open] .step__head::after {
  content: "−";
}

.page-products .step__body {
  padding: 12px 16px 16px;
  border-top: 1px dashed var(--tool-line-soft);
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--tool-dim);
}

.page-products .step__body p {
  margin: 0 0 10px;
}

.page-products .step__body p:last-child {
  margin-bottom: 0;
}

/* ---------- 深色进度带 ---------- */
.page-products .tool-block--night {
  background:
    linear-gradient(180deg, rgba(6, 24, 29, .55), rgba(8, 42, 51, 0) 42%),
    var(--c-night);
  color: var(--c-paper);
  border-top: 2px solid var(--c-shadow);
}

.page-products .tool-block--night .section__index {
  color: var(--c-signal);
}

.page-products .tool-block--night .section__title {
  color: var(--c-paper);
}

.page-products .tool-block--night .lede {
  color: var(--tool-night-dim);
}

.page-products .progress__figure {
  margin: 0 0 clamp(22px, 4vw, 36px);
}

.page-products .timeline {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-products .timeline__node {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 0 0 26px 26px;
  border-left: 2px solid var(--tool-night-line);
}

.page-products .timeline__node:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-products .timeline__node::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--c-deep);
  border: 2px solid var(--c-paper);
}

.page-products .timeline__node.is-current::before {
  background: var(--c-signal);
  box-shadow: 0 0 0 4px rgba(255, 107, 53, .26);
}

.page-products .timeline__when {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--c-steel);
}

.page-products .timeline__node.is-current .timeline__when {
  color: var(--c-signal);
}

.page-products .timeline__what h3 {
  margin: 2px 0 4px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  color: var(--c-paper);
}

.page-products .timeline__what p {
  margin: 0;
  max-width: 52ch;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--tool-night-dim);
}

.page-products .progress__note {
  margin: clamp(24px, 4vw, 36px) 0 0;
  padding-left: 12px;
  border-left: 4px solid var(--c-signal);
  max-width: 62ch;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--tool-night-dim);
}

/* ---------- 收藏与对比 ---------- */
.page-products .handoff {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 36px);
}

.page-products .handoff__figure {
  margin: 0;
}

.page-products .handoff__panels {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  min-width: 0;
}

.page-products .handoff__panel {
  padding: 18px 18px 20px;
  background: var(--c-paper);
  border: 2px solid var(--c-brown);
  box-shadow: 5px 5px 0 var(--c-shadow);
}

.page-products .handoff__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  color: var(--c-night);
}

.page-products .handoff__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-products .handoff__list li {
  position: relative;
  padding-left: 14px;
  font-size: 14.5px;
  line-height: 1.68;
  color: var(--tool-dim);
}

.page-products .handoff__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 6px;
  height: 6px;
  background: var(--c-rust);
}

.page-products .handoff__state {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0 0;
}

.page-products .state-chip {
  display: inline-block;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  border: 1px solid var(--tool-line-soft);
  background: var(--c-cream);
  color: var(--c-deep);
}

.page-products .state-chip--ok {
  background: var(--c-proof);
  border-color: var(--c-proof);
  color: var(--c-night);
}

/* ---------- 版本对比 ---------- */
.page-products .legend {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  margin-bottom: clamp(18px, 3vw, 26px);
}

.page-products .legend__item {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--tool-dim);
}

.page-products .mark {
  display: inline-block;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  border: 1px solid currentColor;
}

.page-products .mark--new {
  background: var(--c-proof);
  border-color: var(--c-proof);
  color: var(--c-night);
}

.page-products .mark--up {
  background: var(--c-rust);
  border-color: var(--c-rust);
  color: var(--c-paper);
}

.page-products .diff-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 4px;
}

.page-products .diff-table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  background: var(--c-paper);
  border: 2px solid var(--c-brown);
  box-shadow: 6px 6px 0 var(--c-shadow);
}

.page-products .diff-caption {
  caption-side: top;
  padding-bottom: 10px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--tool-dim);
}

.page-products .diff-table th,
.page-products .diff-table td {
  padding: 13px 14px;
  text-align: left;
  vertical-align: top;
  font-size: 14.5px;
  line-height: 1.64;
  border-bottom: 1px solid var(--tool-line);
}

.page-products .diff-table thead th {
  background: var(--c-night);
  color: var(--c-paper);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: .08em;
  border-bottom: 2px solid var(--c-shadow);
}

.page-products .diff-table tbody th {
  background: var(--c-cream);
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--c-brown);
  white-space: nowrap;
}

.page-products .diff-table tbody td {
  color: var(--tool-dim);
}

.page-products .diff-table tbody tr:last-child th,
.page-products .diff-table tbody tr:last-child td {
  border-bottom: 0;
}

.page-products .diff__figure {
  margin: clamp(24px, 4vw, 38px) 0 0;
}

/* ---------- 出口区 ---------- */
.page-products .tool-exit {
  background:
    linear-gradient(180deg, rgba(255, 107, 53, .12), rgba(255, 107, 53, 0) 60%),
    var(--c-deep);
  border-top: 4px solid var(--c-shadow);
  padding: clamp(36px, 6vw, 68px) 0;
}

.page-products .tool-exit__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 40px);
}

.page-products .tool-exit__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(28px, 5vw, 42px);
  line-height: 1.1;
  color: var(--c-paper);
}

.page-products .tool-exit__lead p {
  margin: 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.74;
  color: var(--tool-night-dim);
}

.page-products .tool-exit__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  align-content: start;
}

.page-products .tool-exit__links a {
  display: block;
  padding: 13px 15px;
  background: rgba(251, 245, 230, .06);
  border: 2px solid var(--tool-night-line);
  color: var(--c-paper);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  text-decoration: none;
  transition: transform .18s var(--ease), border-color .18s var(--ease), background-color .18s var(--ease);
}

.page-products .tool-exit__links a:hover,
.page-products .tool-exit__links a:focus-visible {
  transform: translate(-2px, -2px);
  border-color: var(--c-signal);
  background: rgba(255, 107, 53, .14);
  outline: none;
}

.page-products .tool-exit__links a:focus-visible {
  outline: 3px solid var(--c-signal);
  outline-offset: 2px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-products .tool-jump {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-products .legend {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-products .tool-exit__links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-products .tool-hero__grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(230px, .75fr);
    align-items: end;
  }

  .page-products .tree {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-products .steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
  }

  .page-products .handoff {
    grid-template-columns: minmax(0, .78fr) minmax(0, 1.22fr);
    align-items: start;
  }

  .page-products .timeline__node {
    grid-template-columns: 128px minmax(0, 1fr);
    align-items: baseline;
    gap: 0 18px;
  }

  .page-products .tool-exit__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
    align-items: start;
  }
}

@media (min-width: 1100px) {
  .page-products .tool-jump {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-products .timeline {
    max-width: 900px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products .tool-jump__item,
  .page-products .tree-node,
  .page-products .tool-exit__links a {
    transition: none;
  }

  .page-products .tool-jump__item:hover,
  .page-products .tree-node:hover,
  .page-products .tool-exit__links a:hover {
    transform: none;
  }
}