.page-products {
  --pp-rail: 200px;
  --pp-card-pad: clamp(20px, 3vw, 32px);
  background: var(--paper-050);
  color: var(--ink-900);
  padding-bottom: var(--sp-6);
}

.page-products .breadcrumb {
  padding-top: var(--sp-4);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--slate);
}

.page-products .breadcrumb a {
  color: var(--blue-500);
  text-decoration: none;
}

.page-products .breadcrumb a:hover {
  text-decoration: underline;
}

/* ---------- 首屏 ---------- */
.page-products .dl-hero {
  display: grid;
  gap: var(--sp-5);
  padding: var(--sp-4) 0 var(--sp-6);
  border-bottom: 1px solid var(--line-400);
}

.page-products .dl-hero__text {
  min-width: 0;
}

.page-products .dl-hero .eyebrow {
  color: var(--amber-deep);
  border-left: 3px solid var(--amber);
  padding-left: 10px;
  letter-spacing: 0.12em;
}

.page-products .dl-hero h1 {
  margin: var(--sp-3) 0 0;
  font-size: clamp(2rem, 1.4rem + 3vw, 3.5rem);
  line-height: 1.18;
  letter-spacing: -0.02em;
  font-weight: 900;
  max-width: 18em;
}

.page-products .dl-hero__lead {
  margin: var(--sp-3) 0 0;
  max-width: 46em;
  font-size: var(--step-1);
  line-height: 1.85;
  color: var(--ink-700);
}

.page-products .dl-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2) var(--sp-3);
  margin-top: var(--sp-4);
  padding-top: var(--sp-3);
  border-top: 1px solid var(--line-400);
}

.page-products .dl-meta-item {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--slate);
}

.page-products .dl-meta-item b {
  display: inline-block;
  margin-left: 6px;
  color: var(--ink-900);
  font-weight: 500;
}

.page-products .dl-figure {
  margin: 0;
  border: 1px solid var(--line-400);
  background: var(--white);
  overflow: hidden;
}

.page-products .dl-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-products .dl-hero__figure {
  border-top: 3px solid var(--amber);
}

/* ---------- 主栅格 ---------- */
.page-products .dl-layout {
  display: grid;
  gap: var(--sp-5);
  padding-top: var(--sp-6);
}

.page-products .dl-rail {
  display: flex;
  gap: var(--sp-3);
  overflow-x: auto;
  padding-bottom: var(--sp-2);
  border-bottom: 1px solid var(--line-400);
}

.page-products .dl-rail__title {
  display: none;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--slate);
  margin: 0 0 var(--sp-3);
}

.page-products .dl-rail__group {
  flex: 0 0 auto;
  min-width: 168px;
}

.page-products .dl-rail__groupname {
  margin: 0 0 var(--sp-2);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--slate);
}

.page-products .dl-rail__item {
  display: block;
  position: relative;
  padding: 7px 10px 7px 12px;
  margin-bottom: 2px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--ink-700);
  text-decoration: none;
  border-left: 4px solid transparent;
  transition: background var(--shift) var(--ease), border-color var(--shift) var(--ease);
}

.page-products .dl-rail__item .mono {
  display: block;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--slate);
}

.page-products .dl-rail__item:hover {
  background: var(--paper-200);
}

.page-products .dl-rail__item.is-active {
  border-left-color: var(--amber);
  background: var(--white);
  color: var(--ink-900);
}

.page-products .dl-rail__item.is-active .mono {
  color: var(--amber-deep);
}

/* ---------- 章节骨架 ---------- */
.page-products .dl-main {
  min-width: 0;
  display: grid;
  gap: var(--sp-7);
}

.page-products .dl-section {
  min-width: 0;
  scroll-margin-top: var(--sp-5);
}

.page-products .dl-section__head h2 {
  margin: 0;
  font-size: clamp(1.5rem, 1.24rem + 1.1vw, 2.05rem);
  line-height: 1.3;
  letter-spacing: -0.01em;
  padding-left: 14px;
  border-left: 3px solid var(--amber);
}

.page-products .dl-section__lead {
  margin: var(--sp-2) 0 0;
  max-width: 44em;
  font-size: var(--step-0);
  line-height: 1.85;
  color: var(--ink-700);
}

.page-products .dl-note {
  margin: var(--sp-4) 0 0;
  padding: var(--sp-3) 0 0 var(--sp-3);
  border-top: 1px solid var(--line-400);
  border-left: 1px solid var(--line-400);
  font-family: var(--font-serif);
  font-size: 15px;
  line-height: 1.9;
  color: var(--ink-700);
}

.page-products .dl-note a {
  color: var(--amber-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 下载卡片 ---------- */
.page-products .dl-card {
  position: relative;
  display: grid;
  gap: var(--sp-4);
  margin-top: var(--sp-4);
  padding: var(--pp-card-pad);
  background: var(--white);
  border: 1px solid var(--line-400);
}

.page-products .dl-card::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 0;
  height: 0;
  border-top: 26px solid var(--paper-200);
  border-right: 26px solid transparent;
}

.page-products .dl-card__label {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-1);
  margin: 0 0 var(--sp-2);
}

.page-products .dl-card__title {
  margin: 0;
  font-size: var(--step-2);
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.page-products .dl-card__desc {
  margin: var(--sp-2) 0 0;
  font-size: var(--step-0);
  line-height: 1.85;
  color: var(--ink-700);
}

.page-products .dl-card__fields {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(132px, 1fr));
  gap: var(--sp-2) var(--sp-3);
  margin: var(--sp-4) 0 0;
  padding-top: var(--sp-3);
  border-top: 1px dashed var(--line-400);
}

.page-products .dl-card__fields dt {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--slate);
}

.page-products .dl-card__fields dd {
  margin: 4px 0 0;
  font-size: 15px;
  color: var(--ink-900);
}

.page-products .dl-card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  margin-top: var(--sp-4);
}

.page-products .dl-card__actions .btn {
  font-size: 14px;
}

.page-products .copy-btn {
  cursor: pointer;
  letter-spacing: 0.04em;
}

.page-products .copy-btn.is-copied {
  border-color: var(--signal);
  color: var(--signal-deep);
}

/* ---------- 时间轴 ---------- */
.page-products .dl-timeline-wrap {
  display: grid;
  gap: var(--sp-4);
  margin-top: var(--sp-4);
}

.page-products .dl-timeline-figure {
  border-left: 3px solid var(--blue-500);
}

.page-products .dl-timeline-col {
  min-width: 0;
}

.page-products .dl-filter {
  margin-bottom: var(--sp-4);
}

.page-products .tl {
  position: relative;
  padding-left: 30px;
}

.page-products .tl::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: var(--line-400);
}

.page-products .tl__item {
  position: relative;
  margin-bottom: var(--sp-3);
  background: var(--white);
  border: 1px solid var(--line-400);
}

.page-products .tl__item::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 15px;
  width: 8px;
  height: 8px;
  background: var(--paper-050);
  border: 1px solid var(--ink-700);
}

.page-products .tl__item--latest::before {
  background: var(--signal);
  border-color: var(--signal);
}

.page-products .tl__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--sp-2);
  padding: 12px var(--sp-3);
  cursor: pointer;
  list-style: none;
  background: var(--paper-200);
}

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

.page-products .tl__head::after {
  content: "▸";
  margin-left: auto;
  font-size: 12px;
  color: var(--slate);
  transition: transform var(--shift) var(--ease);
}

.page-products .tl__item[open] .tl__head::after {
  transform: rotate(90deg);
}

.page-products .tl__no {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--amber-deep);
  font-weight: 500;
}

.page-products .tl__name {
  font-size: 14px;
  color: var(--ink-900);
  font-weight: 500;
}

.page-products .tl__body {
  padding: var(--sp-3);
  border-top: 1px solid var(--line-400);
}

.page-products .tl__changes {
  margin: 0;
  padding-left: 1.1em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-700);
}

.page-products .tl__changes li + li {
  margin-top: 6px;
}

.page-products .tl__meta {
  display: grid;
  gap: var(--sp-2);
  margin: var(--sp-3) 0 0;
  padding-top: var(--sp-2);
  border-top: 1px dashed var(--line-400);
}

.page-products .tl__meta div {
  display: grid;
  gap: 2px;
}

.page-products .tl__meta dt {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--slate);
}

.page-products .tl__meta dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-700);
}

/* ---------- 对照表 ---------- */
.page-products .dl-compare-figure {
  margin-top: var(--sp-4);
}

.page-products .cmp-wrap {
  margin-top: var(--sp-4);
  overflow-x: auto;
  border: 1px solid var(--line-400);
  background: var(--white);
}

.page-products .cmp,
.page-products .compat {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-products .cmp caption,
.page-products .compat caption {
  caption-side: top;
  padding: 12px var(--sp-3);
  text-align: left;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--slate);
  border-bottom: 1px solid var(--line-400);
  background: var(--paper-200);
}

.page-products .cmp th,
.page-products .cmp td,
.page-products .compat th,
.page-products .compat td {
  padding: 11px var(--sp-3);
  text-align: left;
  vertical-align: top;
  line-height: 1.65;
  border-bottom: 1px solid var(--line-400);
}

.page-products .cmp thead th,
.page-products .compat thead th {
  background: var(--ink-700);
  color: var(--white);
  font-weight: 500;
  letter-spacing: 0.06em;
  border-bottom: none;
}

.page-products .cmp tbody th,
.page-products .compat tbody th {
  font-weight: 500;
  color: var(--ink-900);
  width: 26%;
}

.page-products .cmp tbody tr:nth-child(odd),
.page-products .compat tbody tr:nth-child(odd) {
  background: var(--paper-050);
}

.page-products .cmp tbody tr:nth-child(even),
.page-products .compat tbody tr:nth-child(even) {
  background: var(--white);
}

.page-products .cmp td,
.page-products .compat td {
  color: var(--ink-700);
}

.page-products .cmp-diff {
  font-weight: 700;
  color: var(--amber-deep);
  box-shadow: inset 3px 0 0 var(--amber);
  padding-left: calc(var(--sp-3) + 6px);
}

/* ---------- 兼容性 ---------- */
.page-products .dl-compat-grid {
  display: grid;
  gap: var(--sp-4);
  margin-top: var(--sp-4);
}

.page-products .dl-compat-figure {
  border-top: 3px solid var(--blue-500);
}

.page-products .compat-wrap {
  min-width: 0;
  overflow-x: auto;
  border: 1px solid var(--line-400);
  background: var(--white);
}

/* ---------- 校验 ---------- */
.page-products .dl-check-grid {
  display: grid;
  gap: var(--sp-4);
  margin-top: var(--sp-4);
}

.page-products .check-steps {
  display: grid;
  gap: var(--sp-3);
}

.page-products .check-step {
  padding: var(--sp-3);
  background: var(--white);
  border: 1px solid var(--line-400);
  border-left: 4px solid var(--amber);
}

.page-products .check-step__no {
  margin: 0 0 6px;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--amber-deep);
}

.page-products .check-step h3 {
  margin: 0 0 6px;
  font-size: 16px;
  letter-spacing: 0.01em;
}

.page-products .check-step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-700);
}

.page-products .dl-check-side {
  display: grid;
  gap: var(--sp-3);
  min-width: 0;
}

.page-products .dl-check-codes {
  padding: var(--sp-3);
  background: var(--ink-900);
  border: 1px solid var(--ink-700);
}

.page-products .dl-check-codes__title {
  margin: 0 0 6px;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--paper-200);
}

.page-products .dl-check-codes__title + .copy-btn {
  margin-bottom: var(--sp-3);
}

.page-products .dl-check-codes .copy-btn {
  width: 100%;
  background: var(--ink-700);
  border-color: var(--blue-500);
  color: var(--white);
}

.page-products .dl-check-codes .copy-btn:hover {
  border-color: var(--signal);
  color: var(--white);
}

/* ---------- 常见情况 ---------- */
.page-products .dl-acc {
  margin-top: var(--sp-3);
  border-bottom: 1px solid var(--line-400);
}

.page-products .dl-acc:first-of-type {
  margin-top: var(--sp-4);
  border-top: 1px solid var(--line-400);
}

.page-products .dl-acc summary {
  cursor: pointer;
  padding: 14px 0;
  font-size: 15px;
  font-weight: 500;
  color: var(--ink-900);
  list-style: none;
}

.page-products .dl-acc summary::-webkit-details-marker {
  display: none;
}

.page-products .dl-acc summary::before {
  content: "▸";
  display: inline-block;
  margin-right: 10px;
  font-size: 12px;
  color: var(--amber-deep);
  transition: transform var(--shift) var(--ease);
}

.page-products .dl-acc[open] summary::before {
  transform: rotate(90deg);
}

.page-products .dl-acc .accordion__body ol {
  margin: 0 0 var(--sp-3);
  padding-left: 1.4em;
  font-size: 14px;
  line-height: 1.9;
  color: var(--ink-700);
}

.page-products .dl-acc .accordion__body li + li {
  margin-top: 6px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-products .dl-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: center;
  }

  .page-products .dl-timeline-wrap {
    grid-template-columns: minmax(0, 5fr) minmax(0, 8fr);
    align-items: start;
  }

  .page-products .dl-timeline-figure {
    position: sticky;
    top: var(--sp-4);
  }

  .page-products .dl-check-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-products .dl-compat-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (min-width: 1000px) {
  .page-products .dl-layout {
    grid-template-columns: var(--pp-rail) minmax(0, 1fr);
    gap: var(--sp-6);
    align-items: start;
  }

  .page-products .dl-rail {
    display: block;
    position: sticky;
    top: var(--sp-4);
    overflow: visible;
    padding-bottom: 0;
    border-bottom: none;
    border-left: 1px solid var(--line-400);
    padding-left: var(--sp-3);
  }

  .page-products .dl-rail__title {
    display: block;
  }

  .page-products .dl-rail__group {
    min-width: 0;
    margin-bottom: var(--sp-4);
  }

  .page-products .dl-rail__group:last-child {
    margin-bottom: 0;
  }

  .page-products .dl-card {
    grid-template-columns: minmax(1fr, 1fr);
  }

  .page-products .dl-compat-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 7fr);
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products .dl-rail__item,
  .page-products .tl__head::after,
  .page-products .dl-acc summary::before {
    transition: none;
  }
}
<<<PAGE_CSS_DONE>>>
</main>