.page-products {
  --fn-gap: clamp(20px, 4vw, 56px);
  --fn-side: 220px;
  --fn-accent-soft: rgba(38, 224, 214, .14);
  background: var(--paper);
  color: var(--char);
  padding-bottom: clamp(48px, 7vw, 88px);
  overflow-x: clip;
}

.page-products .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 20px var(--gutter) 0;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
}

.page-products .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: 8px;
  color: var(--rule);
}

.page-products .breadcrumb__link {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--sand);
  padding-bottom: 1px;
}

.page-products .breadcrumb__link:hover {
  border-bottom-color: var(--coral);
}

/* ---------- 首屏拼贴 ---------- */
.page-products .fn-hero {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(22px, 3.4vw, 42px) var(--gutter) 0;
  display: grid;
  gap: var(--fn-gap);
  align-items: end;
}

.page-products .fn-hero__kicker {
  margin: 0;
  color: var(--sand);
  font-family: var(--font-mono);
}

.page-products .fn-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 6.2vw, 58px);
  line-height: 1.12;
  letter-spacing: -.01em;
  color: var(--ink);
  margin: 12px 0 0;
  max-width: 18ch;
}

.page-products .fn-lede {
  margin: 18px 0 0;
  max-width: 52ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
  color: #3A332C;
}

.page-products .fn-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-products .fn-hero__side {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 0 100%);
}

.page-products .fn-stat {
  background: var(--ink);
  padding: 16px 14px 14px;
}

.page-products .fn-stat:nth-child(2n) {
  background: var(--ink-2);
}

.page-products .fn-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(22px, 3.2vw, 30px);
  line-height: 1.1;
  color: var(--signal);
  letter-spacing: -.02em;
}

.page-products .fn-stat__num em {
  font-style: normal;
  font-size: 13px;
  margin-left: 2px;
  color: var(--mist);
}

.page-products .fn-stat__label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: .08em;
  color: #9FB4C4;
}

/* ---------- 索引条 ---------- */
.page-products .fn-index {
  max-width: var(--maxw);
  margin: clamp(26px, 4vw, 46px) auto 0;
  padding: 0 var(--gutter) 4px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-products .fn-index__link {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--ink);
  text-decoration: none;
  background: var(--paper-2);
  border: 1px solid var(--rule);
  padding: 8px 12px;
  transition: background .18s var(--ease), border-color .18s var(--ease), color .18s var(--ease);
}

.page-products .fn-index__link:hover,
.page-products .fn-index__link:focus-visible {
  background: var(--mist);
  border-color: var(--signal);
}

.page-products .fn-index__link.is-current {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--signal);
}

/* ---------- 章节骨架 ---------- */
.page-products .fn-section {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(38px, 5.6vw, 72px) var(--gutter) 0;
  scroll-margin-top: calc(var(--bar-h) + 16px);
}

.page-products .fn-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 16px;
  border-top: 2px solid var(--ink);
  padding-top: 14px;
  position: relative;
}

.page-products .fn-head::before {
  content: "";
  position: absolute;
  top: -2px;
  left: 0;
  width: 74px;
  height: 6px;
  background: linear-gradient(115deg, var(--sand) 0%, var(--coral) 100%);
}

.page-products .fn-head__idx {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--sand);
}

.page-products .fn-head h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 3.4vw, 33px);
  line-height: 1.24;
  color: var(--ink);
  margin: 0;
  flex: 1 1 auto;
}

.page-products .fn-head__note {
  color: var(--muted);
  margin-left: auto;
}

/* ---------- 左窄右宽功能行 ---------- */
.page-products .fn-row {
  display: grid;
  gap: clamp(16px, 3vw, 34px);
  margin-top: 22px;
}

.page-products .fn-row__side {
  border-left: 2px solid var(--sand);
  padding-left: 14px;
}

.page-products .fn-ver {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  background: var(--ink);
  color: var(--signal);
  padding: 4px 9px;
}

.page-products .fn-row__topic {
  margin: 10px 0 4px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  color: var(--ink);
  letter-spacing: .01em;
}

.page-products .fn-row__side .annotation {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.page-products .fn-row__body {
  min-width: 0;
}

.page-products .fn-row__body p {
  margin: 0 0 14px;
  max-width: 62ch;
  line-height: 1.85;
  font-size: 15px;
}

.page-products .fn-body-lead {
  margin: 20px 0 0;
  max-width: 62ch;
  line-height: 1.85;
  font-size: 15px;
}

/* ---------- 勾选计数条 ---------- */
.page-products .fn-meter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  margin: 20px 0 0;
  padding: 14px 16px;
  background: var(--ink);
  border: 1px solid var(--ink);
}

.page-products .fn-meter__cells {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}

.page-products .fn-meter__cell {
  width: 15px;
  height: 15px;
  border: 1px solid #4C6A82;
  background: transparent;
}

.page-products .fn-meter__cell.is-on {
  background: var(--signal);
  border-color: var(--signal);
}

.page-products .fn-meter__count {
  margin: 0 0 0 auto;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--mist);
}

/* ---------- 图注框 ---------- */
.page-products .fn-figure {
  margin: 22px 0 0;
  padding: 10px 10px 12px;
  background: var(--paper-2);
  border: 1px solid var(--rule);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 0 100%);
}

.page-products .fn-figure--wide {
  margin-top: 26px;
}

.page-products .fn-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--rule);
  background: var(--paper);
}

.page-products .fn-figure__cap {
  margin-top: 10px;
  padding-left: 12px;
  border-left: 2px solid var(--signal);
  font-size: 12.5px;
  line-height: 1.7;
  letter-spacing: .04em;
  color: var(--muted);
}

/* ---------- 字段清单 ---------- */
.page-products .fn-fields {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  border-top: 1px solid var(--rule);
  max-width: 62ch;
}

.page-products .fn-fields li {
  display: grid;
  gap: 3px;
  padding: 12px 0;
  border-bottom: 1px solid var(--rule);
  font-size: 14px;
  line-height: 1.7;
  color: #3A332C;
}

.page-products .fn-fields li span {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--ink-2);
}

/* ---------- 导出格式 ---------- */
.page-products .fn-formats {
  display: grid;
  gap: 12px;
  margin-top: 20px;
}

.page-products .fn-format {
  background: var(--paper-2);
  border: 1px solid var(--rule);
  border-left: 4px solid var(--coral);
  padding: 14px 16px 16px;
}

.page-products .fn-format__ext {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--coral);
}

.page-products .fn-format__desc {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: #3A332C;
}

/* ---------- 宽幅表格 ---------- */
.page-products .fn-table-wrap {
  width: 100%;
  margin-top: 24px;
  overflow-x: auto;
  border: 1px solid var(--rule);
  background: var(--paper);
  scrollbar-width: thin;
}

.page-products .fn-table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-products .fn-table__caption {
  caption-side: top;
  text-align: left;
  padding: 10px 14px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--muted);
  background: var(--paper-2);
  border-bottom: 1px solid var(--rule);
}

.page-products .fn-table thead th {
  background: var(--ink);
  color: var(--paper);
  font-weight: 600;
  font-size: 12.5px;
  letter-spacing: .1em;
  text-align: left;
  padding: 12px 14px;
  white-space: nowrap;
}

.page-products .fn-table tbody th {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--ink);
  text-align: left;
  padding: 14px;
  white-space: nowrap;
  border-bottom: 1px solid var(--rule);
  vertical-align: top;
}

.page-products .fn-table tbody td {
  padding: 14px;
  line-height: 1.7;
  color: #3A332C;
  border-bottom: 1px solid var(--rule);
  vertical-align: top;
}

.page-products .fn-table tbody tr:nth-child(even) {
  background: var(--paper-2);
}

.page-products .fn-table tbody tr:hover {
  box-shadow: inset 4px 0 0 var(--signal);
}

.page-products .fn-table tbody tr.is-current {
  background: var(--fn-accent-soft);
  box-shadow: inset 4px 0 0 var(--signal);
}

.page-products .fn-table tbody tr.is-current th {
  color: var(--ink-2);
}

.page-products .fn-tail-note {
  margin: 16px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 62ch;
}

/* ---------- 场景卡 ---------- */
.page-products .fn-scenes {
  display: grid;
  gap: 14px;
  margin-top: 22px;
}

.page-products .fn-scene {
  background: var(--paper-2);
  border: 1px solid var(--rule);
  padding: 18px 18px 22px;
  position: relative;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-products .fn-scene__tag {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--coral);
}

.page-products .fn-scene h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  color: var(--ink);
  line-height: 1.35;
}

.page-products .fn-scene p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: #3A332C;
}

/* ---------- 四步刻度条 ---------- */
.page-products .fn-steps {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-products .fn-step {
  position: relative;
  padding-left: 16px;
  border-left: 2px solid var(--rule);
}

.page-products .fn-step__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 26px;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--sand);
  font-variant-numeric: tabular-nums;
}

.page-products .fn-step h3 {
  margin: 8px 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  color: var(--ink);
}

.page-products .fn-step p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: #3A332C;
}

/* ---------- 尾段 ---------- */
.page-products .fn-outro {
  margin-top: 30px;
  padding: 20px 22px;
  background: var(--ink);
  border-left: 6px solid var(--signal);
}

.page-products .fn-outro p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: #D5DEE6;
}

.page-products .fn-outro p + p {
  margin-top: 8px;
}

.page-products .fn-outro a {
  color: var(--signal);
  text-decoration: none;
  border-bottom: 1px solid rgba(38, 224, 214, .45);
}

.page-products .fn-outro a:hover {
  border-bottom-color: var(--signal);
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-products .fn-formats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-products .fn-fields li {
    grid-template-columns: 120px minmax(0, 1fr);
    align-items: baseline;
    gap: 10px;
  }
}

@media (min-width: 900px) {
  .page-products .fn-hero {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, .85fr);
  }

  .page-products .fn-row {
    grid-template-columns: minmax(0, var(--fn-side)) minmax(0, 1fr);
    align-items: start;
  }

  .page-products .fn-row__side {
    position: sticky;
    top: calc(var(--bar-h) + 28px);
  }

  .page-products .fn-scenes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-products .fn-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
  }

  .page-products .fn-step {
    border-left: 0;
    border-top: 2px solid var(--rule);
    padding: 32px 20px 0 0;
  }

  .page-products .fn-step:first-child {
    border-top-color: var(--signal);
  }

  .page-products .fn-step::before {
    content: "";
    position: absolute;
    top: -7px;
    left: 0;
    width: 11px;
    height: 11px;
    background: var(--signal);
    transform: rotate(45deg);
  }
}

@media (min-width: 1180px) {
  .page-products .fn-table-wrap {
    margin-right: calc(var(--gutter) * -.5);
    width: calc(100% + var(--gutter) * .5);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products .fn-index__link {
    transition: none;
  }
}
<<<END>>>