/* ===== 对照台 · 页面专属样式（作用域 .page-products） ===== */

.page-products .pt-hero {
  position: relative;
  overflow: hidden;
  padding-top: calc(var(--space-section) * 0.6);
  padding-bottom: var(--space-section);
  background-color: var(--ink-800);
  border-bottom: 1px solid var(--line);
}

.page-products .pt-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(36, 56, 75, 0.55) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(36, 56, 75, 0.55) 1px, transparent 1px);
  background-size: 24px 24px;
  opacity: 0.28;
  pointer-events: none;
}

.page-products .pt-hero > .container {
  position: relative;
  z-index: 1;
}

.page-products .pt-hero__layout {
  display: grid;
  gap: 40px;
  margin-top: 28px;
}

.page-products .pt-hero__text h1 {
  margin: 14px 0 0;
  max-width: 16em;
  font-family: var(--font-display);
  font-size: clamp(30px, 5.4vw, 52px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--text-1);
}

.page-products .pt-hero__text .t-lead {
  margin-top: 20px;
  max-width: 60ch;
  font-size: var(--step-3);
  line-height: 1.8;
  color: var(--text-2);
}

.page-products .pt-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-products .pt-hero__stats {
  display: grid;
  gap: 0;
  margin: 0;
  align-content: start;
}

.page-products .pt-stat {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

.page-products .pt-stat:last-child {
  border-bottom: 1px solid var(--line);
}

.page-products .pt-stat dt {
  font-size: var(--step-2);
  line-height: 1.5;
  color: var(--text-2);
}

.page-products .pt-stat dd {
  margin: 0;
  font-size: var(--step-4);
  line-height: 1.2;
  color: var(--brass-soft);
  white-space: nowrap;
}

.page-products .pt-stat dd span {
  margin-left: 4px;
  font-size: var(--step-1);
  color: var(--slate);
}

/* ---- 筛选带 ---- */

.page-products .pt-filter {
  padding: 24px 0;
  background-color: var(--ink-900);
  border-bottom: 1px solid var(--line);
}

.page-products .pt-filter__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: var(--step-1);
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--brass);
}

.page-products .pt-filter__bar {
  display: grid;
  gap: 16px;
  padding: 20px 22px;
  background-color: var(--ink-700);
  background-image: linear-gradient(115deg, rgba(185, 136, 63, 0.1), transparent 46%);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
}

.page-products .pt-filter__group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.page-products .pt-filter__label {
  min-width: 5em;
  font-family: var(--font-mono);
  font-size: var(--step-1);
  letter-spacing: 0.06em;
  color: var(--slate);
}

.page-products .pt-chip {
  font-family: var(--font-body);
  font-size: var(--step-2);
  line-height: 1.4;
  padding: 6px 12px;
  color: var(--text-2);
  background: transparent;
  border: 1px solid var(--line);
  cursor: pointer;
  transition: color 180ms ease, border-color 180ms ease, background-color 180ms ease;
}

.page-products .pt-chip:hover,
.page-products .pt-chip:focus-visible {
  color: var(--text-1);
  border-color: var(--brass-soft);
}

.page-products .pt-chip.is-on {
  color: var(--amber);
  border-color: var(--amber);
  background-color: rgba(240, 138, 36, 0.1);
}

.page-products .pt-filter__count {
  margin: 4px 0 0;
  font-size: var(--step-2);
  color: var(--text-2);
}

.page-products .pt-filter__count .mono {
  color: var(--celadon);
}

/* ---- 怎么读 ---- */

.page-products .pt-read {
  background-color: var(--ink-800);
}

.page-products .pt-steps {
  display: grid;
  gap: 28px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: none;
}

.page-products .pt-step {
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.page-products .pt-step__num {
  display: inline-block;
  font-size: var(--step-2);
  color: var(--brass);
  letter-spacing: 0.08em;
}

.page-products .pt-step__title {
  margin: 8px 0 10px;
  font-family: var(--font-display);
  font-size: var(--step-4);
  font-weight: 600;
  line-height: 1.3;
  color: var(--text-1);
}

.page-products .pt-step p {
  margin: 0;
  font-size: var(--step-3);
  line-height: 1.8;
  color: var(--text-2);
}

.page-products .pt-legend {
  margin-top: 48px;
  padding: 24px;
  background-color: var(--ink-700);
  border-left: 3px solid var(--brass);
}

.page-products .pt-legend__title {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: var(--step-1);
  letter-spacing: 0.08em;
  color: var(--brass-soft);
}

.page-products .pt-legend__svg {
  display: block;
  width: 100%;
  max-width: 340px;
  height: auto;
  margin-bottom: 20px;
}

.page-products .pt-legend__svg line {
  stroke-width: 4;
  stroke-linecap: butt;
}

.page-products .pt-legend__svg .pt-svg-move { stroke: var(--amber); }
.page-products .pt-legend__svg .pt-svg-add { stroke: var(--celadon); }
.page-products .pt-legend__svg .pt-svg-fix-a { stroke: var(--celadon); }
.page-products .pt-legend__svg .pt-svg-fix-b { stroke: var(--amber); }

.page-products .pt-legend__svg text {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  fill: var(--text-2);
}

.page-products .pt-legend__list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-products .pt-legend__item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: var(--step-2);
  line-height: 1.7;
  color: var(--text-2);
}

.page-products .pt-legend__mark {
  flex: 0 0 auto;
  width: 24px;
  height: 4px;
  margin-top: 9px;
  background-color: var(--line);
}

.page-products .pt-legend__item--move .pt-legend__mark { background-color: var(--amber); }
.page-products .pt-legend__item--add .pt-legend__mark { background-color: var(--celadon); }
.page-products .pt-legend__item--fix .pt-legend__mark {
  background-image: linear-gradient(90deg, var(--celadon) 0 42%, transparent 42% 58%, var(--amber) 58% 100%);
}

/* ---- 三类差异 ---- */

.page-products .pt-diffs {
  background-color: var(--ink-800);
  border-top: 1px solid var(--line);
}

.page-products .pt-diffs__body {
  display: grid;
  gap: 32px;
}

.page-products .pt-diffs__fig {
  margin: 0;
  background-color: var(--ink-700);
  border: 1px solid var(--line);
}

.page-products .pt-diffs__fig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-products .pt-diffs__list {
  display: grid;
  gap: 24px;
  margin: 0;
}

.page-products .pt-diff {
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.page-products .pt-diff dt {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: var(--step-4);
  font-weight: 600;
  color: var(--text-1);
}

.page-products .pt-diff dd {
  margin: 10px 0 0;
  font-size: var(--step-3);
  line-height: 1.8;
  color: var(--text-2);
}

.page-products .pt-diff__mark {
  flex: 0 0 auto;
  width: 22px;
  height: 4px;
  background-color: var(--line);
}

.page-products .pt-diff__mark--move { background-color: var(--amber); }
.page-products .pt-diff__mark--add { background-color: var(--celadon); }
.page-products .pt-diff__mark--fix {
  background-image: linear-gradient(90deg, var(--celadon) 0 42%, transparent 42% 58%, var(--amber) 58% 100%);
}

/* ---- 两栏内容（纸白分区） ---- */

.page-products .pt-panes .section-head__title {
  color: var(--on-paper-1);
}

.page-products .pt-panes .section-head__meta {
  color: var(--on-paper-2);
}

.page-products .pt-panes__grid {
  display: grid;
  gap: 32px;
}

.page-products .pt-pane {
  padding-top: 20px;
  border-top: 2px solid var(--on-paper-1);
}

.page-products .pt-pane__tag {
  display: inline-block;
  margin: 0 0 16px;
  color: var(--on-paper-2);
  border-color: var(--on-paper-2);
}

.page-products .pt-pane__fig {
  margin: 0 0 20px;
  background-color: rgba(10, 22, 34, 0.06);
  border: 1px solid rgba(10, 22, 34, 0.14);
  overflow: hidden;
}

.page-products .pt-pane__fig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  mix-blend-mode: multiply;
}

.page-products .pt-pane__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: var(--step-4);
  font-weight: 600;
  line-height: 1.3;
  color: var(--on-paper-1);
}

.page-products .pt-pane__list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-products .pt-pane__list li {
  position: relative;
  padding-left: 18px;
  font-size: var(--step-3);
  line-height: 1.8;
  color: var(--on-paper-2);
}

.page-products .pt-pane__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.75em;
  width: 8px;
  height: 2px;
  background-color: var(--brass-ink);
}

/* ---- 对照条目表 ---- */

.page-products .pt-table {
  background-color: var(--ink-800);
}

.page-products .pt-head {
  display: none;
}

.page-products .pt-rows {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-products .pt-row {
  display: grid;
  gap: 10px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
  transition: background-color 180ms ease;
}

.page-products .pt-row:hover {
  background-color: rgba(185, 136, 63, 0.07);
}

.page-products .pt-row__ver {
  font-size: var(--step-2);
  letter-spacing: 0.06em;
  color: var(--brass-soft);
  border-bottom: 1px solid rgba(224, 188, 130, 0.4);
  justify-self: start;
}

.page-products .pt-row__old,
.page-products .pt-row__new {
  font-size: var(--step-3);
  line-height: 1.75;
  color: var(--text-2);
}

.page-products .pt-row__new {
  color: var(--text-1);
}

.page-products .pt-row__old::before,
.page-products .pt-row__new::before {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: var(--step-1);
  letter-spacing: 0.08em;
  color: var(--slate);
}

.page-products .pt-row__old::before { content: "旧版条目"; }
.page-products .pt-row__new::before { content: "桌面端条目"; }

.page-products .pt-row__type {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  align-self: start;
  justify-self: start;
  font-family: var(--font-mono);
  font-size: var(--step-1);
  letter-spacing: 0.04em;
  color: var(--text-2);
}

.page-products .pt-row__type::before {
  content: "";
  flex: 0 0 auto;
  width: 18px;
  height: 3px;
  background-color: var(--line);
}

.page-products .pt-row__type--move { color: var(--amber); }
.page-products .pt-row__type--move::before { background-color: var(--amber); }

.page-products .pt-row__type--add { color: var(--celadon); }
.page-products .pt-row__type--add::before { background-color: var(--celadon); }

.page-products .pt-row__type--fix { color: var(--brass-soft); }
.page-products .pt-row__type--fix::before {
  background-image: linear-gradient(90deg, var(--celadon) 0 42%, transparent 42% 58%, var(--amber) 58% 100%);
}

/* ---- 差异放大区 ---- */

.page-products .pt-zoom {
  padding: var(--space-section) 0;
  background-color: var(--ink-700);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-products .pt-zoom__inner {
  display: grid;
  gap: 32px;
}

.page-products .pt-zoom__fig {
  margin: 0;
  border: 1px solid var(--line);
  background-color: var(--ink-800);
}

.page-products .pt-zoom__fig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-products .pt-zoom__title {
  margin: 10px 0 14px;
  font-family: var(--font-display);
  font-size: clamp(24px, 3.4vw, var(--step-5));
  font-weight: 600;
  line-height: 1.28;
  color: var(--text-1);
}

.page-products .pt-zoom__text p:last-child {
  margin: 0;
  font-size: var(--step-3);
  line-height: 1.85;
  color: var(--text-2);
}

/* ---- 筛选与定位（纸白分区） ---- */

.page-products .pt-locate .section-head__title {
  color: var(--on-paper-1);
}

.page-products .pt-locate .section-head__meta {
  color: var(--on-paper-2);
}

.page-products .pt-locate__body {
  display: grid;
  gap: 32px;
}

.page-products .pt-locate__steps {
  display: grid;
  gap: 16px;
  margin: 0 0 24px;
  padding: 0;
  list-style: none;
}

.page-products .pt-locate__steps li {
  padding-top: 14px;
  border-top: 1px solid rgba(10, 22, 34, 0.16);
  font-size: var(--step-3);
  line-height: 1.8;
  color: var(--on-paper-2);
}

.page-products .pt-locate__steps .mono {
  display: inline-block;
  margin-right: 10px;
  padding: 2px 8px;
  font-size: var(--step-1);
  letter-spacing: 0.06em;
  color: var(--paper);
  background-color: var(--on-paper-1);
}

.page-products .pt-locate__note {
  margin: 0 0 14px;
  padding-left: 16px;
  border-left: 3px solid var(--celadon);
  font-size: var(--step-3);
  line-height: 1.8;
  color: var(--on-paper-2);
}

.page-products .pt-locate__link {
  margin: 0;
  font-size: var(--step-2);
  line-height: 1.8;
  color: var(--on-paper-2);
}

.page-products .pt-locate__link a {
  color: var(--brass-ink);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-products .pt-locate__fig {
  margin: 0;
  border: 1px solid rgba(10, 22, 34, 0.18);
  background-color: rgba(10, 22, 34, 0.04);
  overflow: hidden;
}

.page-products .pt-locate__fig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  mix-blend-mode: multiply;
}

/* ---- 适用人群 ---- */

.page-products .pt-who {
  background-color: var(--ink-800);
}

.page-products .pt-who__grid {
  display: grid;
  gap: 28px;
}

.page-products .pt-who__item {
  padding-top: 18px;
  border-top: 2px solid var(--brass);
}

.page-products .pt-who__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: var(--step-4);
  font-weight: 600;
  line-height: 1.35;
  color: var(--text-1);
}

.page-products .pt-who__item p {
  margin: 0;
  font-size: var(--step-3);
  line-height: 1.8;
  color: var(--text-2);
}

/* ---- 收束 ---- */

.page-products .pt-next {
  padding: var(--space-section) 0;
  background-color: var(--ink-900);
}

.page-products .pt-next__panel {
  display: grid;
  gap: 24px;
  padding: 32px 24px;
  background-color: var(--ink-700);
  border-left: 4px solid var(--amber);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}

.page-products .pt-next__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: var(--step-5);
  font-weight: 600;
  line-height: 1.25;
  color: var(--text-1);
}

.page-products .pt-next__text p {
  margin: 0;
  max-width: 56ch;
  font-size: var(--step-3);
  line-height: 1.8;
  color: var(--text-2);
}

.page-products .pt-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ===== 响应式：平板及以上 ===== */

@media (min-width: 760px) {
  .page-products .pt-hero__actions {
    margin-top: 36px;
  }

  .page-products .pt-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 32px;
    column-gap: 40px;
  }

  .page-products .pt-legend {
    display: grid;
    grid-template-columns: minmax(0, 320px) minmax(0, 1fr);
    gap: 32px 40px;
    padding: 28px 32px;
  }

  .page-products .pt-legend__title {
    grid-column: 1 / -1;
    margin-bottom: 0;
  }

  .page-products .pt-legend__svg {
    margin-bottom: 0;
  }

  .page-products .pt-panes__grid,
  .page-products .pt-diffs__body,
  .page-products .pt-locate__body,
  .page-products .pt-who__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 40px;
  }

  .page-products .pt-zoom__inner {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    gap: 48px;
    align-items: center;
  }

  .page-products .pt-next__panel {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: center;
    gap: 40px;
    padding: 48px 40px;
  }

  .page-products .pt-next__actions {
    justify-content: flex-end;
  }
}

/* ===== 响应式：桌面端 ===== */

@media (min-width: 1000px) {
  .page-products .pt-hero__layout {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: 64px;
    align-items: end;
  }

  .page-products .pt-diffs__body {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
    gap: 56px;
    align-items: start;
  }

  .page-products .pt-head {
    display: grid;
    grid-template-columns: 96px minmax(0, 1fr) minmax(0, 1fr) 118px;
    gap: 24px;
    padding: 0 0 12px;
    border-bottom: 1px solid var(--line);
    font-family: var(--font-mono);
    font-size: var(--step-1);
    letter-spacing: 0.08em;
    color: var(--slate);
  }

  .page-products .pt-row {
    grid-template-columns: 96px minmax(0, 1fr) minmax(0, 1fr) 118px;
    gap: 24px;
    align-items: start;
    padding: 24px 12px;
    margin: 0 -12px;
  }

  .page-products .pt-row__old::before,
  .page-products .pt-row__new::before {
    display: none;
  }

  .page-products .pt-row__ver {
    padding-top: 2px;
  }
}

@media (min-width: 1180px) {
  .page-products .pt-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-products .pt-who__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 32px;
  }

  .page-products .pt-legend {
    grid-template-columns: minmax(0, 300px) minmax(0, 1fr) minmax(0, 1fr);
  }

  .page-products .pt-legend__title {
    grid-column: 1 / -1;
  }
}

/* ===== 降低动效偏好 ===== */

@media (prefers-reduced-motion: reduce) {
  .page-products .pt-row,
  .page-products .pt-chip {
    transition: none;
  }
}
</page_css>