/* ============================================
   page-products · 内容目录
   外部大留白 + 内部高密度对照
   ============================================ */

.page-products {
  --cat-hair: rgba(42, 47, 61, 0.85);
  --cat-soft: rgba(122, 59, 255, 0.12);
  --cat-cyan-soft: rgba(35, 230, 216, 0.14);
  padding-bottom: clamp(96px, 12vw, 160px);
}

/* ---------- 面包屑 ---------- */
.page-products .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding-top: clamp(88px, 11vw, 132px);
  font-family: var(--font-mono);
  font-size: var(--fs-6);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--grey);
}

.page-products .breadcrumb a {
  color: var(--grey);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-products .breadcrumb a:hover,
.page-products .breadcrumb a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-products .breadcrumb span[aria-hidden="true"] {
  color: var(--violet);
}

/* ---------- 首屏 ---------- */
.page-products .cat-hero {
  display: grid;
  gap: clamp(36px, 5vw, 72px);
  padding-top: clamp(32px, 4.5vw, 64px);
}

@media (min-width: 960px) {
  .page-products .cat-hero {
    grid-template-columns: 7fr 5fr;
    align-items: end;
  }
}

.page-products .cat-hero__lead h1 {
  margin: 16px 0 0;
  font-family: var(--font-cn);
  font-weight: 900;
  font-size: var(--fs-1);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--white);
  max-width: 22ch;
}

.page-products .cat-hero__lead h1::after {
  content: "";
  display: block;
  width: clamp(72px, 12vw, 148px);
  height: 3px;
  margin-top: 22px;
  background: var(--grad);
}

.page-products .cat-hero__en {
  margin: 18px 0 0;
  color: var(--cyan);
  display: block;
}

.page-products .cat-hero__lead .lede {
  margin-top: 22px;
  max-width: 44ch;
  color: var(--grey);
}

.page-products .cat-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

/* 数据条 */
.page-products .cat-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-products .cat-stat {
  background: var(--ink);
  padding: clamp(18px, 2.2vw, 26px) clamp(16px, 2vw, 22px);
  display: grid;
  gap: 8px;
}

.page-products .cat-stat dt {
  font-family: var(--font-mono);
  font-size: var(--fs-6);
  letter-spacing: 0.14em;
  color: var(--grey);
}

.page-products .cat-stat dd {
  margin: 0;
  font-size: var(--fs-3);
  color: var(--white);
  font-variant-numeric: tabular-nums;
}

/* ---------- 章节通用 ---------- */
.page-products .cat-section__head {
  margin-bottom: clamp(30px, 4vw, 56px);
}

.page-products .cat-section__lead {
  margin-top: 20px;
  max-width: 60ch;
  color: var(--grey);
}

.page-products .cat-section__head--split {
  display: grid;
  gap: clamp(24px, 3vw, 44px);
}

@media (min-width: 900px) {
  .page-products .cat-section__head--split {
    grid-template-columns: 8fr 4fr;
    align-items: center;
  }
}

/* ---------- 图片框 ---------- */
.page-products .cat-figure {
  margin: 0 0 clamp(30px, 4vw, 52px);
  position: relative;
}

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

.page-products .cat-figure__cap {
  margin-top: 10px;
  font-size: var(--fs-6);
  letter-spacing: 0.12em;
  color: var(--grey);
}

.page-products .cat-figure--banner img {
  aspect-ratio: 4 / 3;
}

.page-products .cat-figure--tail img {
  aspect-ratio: 16 / 9;
  margin-top: clamp(36px, 5vw, 64px);
}

.page-products .cat-figure--float {
  max-width: 340px;
  margin-left: auto;
  margin-right: 0;
}

.page-products .cat-figure--float img {
  aspect-ratio: 3 / 4;
  border-color: var(--cat-hair);
}

.page-products .cat-figure--icons img {
  aspect-ratio: 4 / 3;
  border-color: var(--cat-hair);
}

/* ---------- 结构带 ---------- */
.page-products .cat-rail {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

@media (min-width: 720px) {
  .page-products .cat-rail {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-products .cat-rail {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-products .cat-rail__item {
  position: relative;
  background: var(--ink);
  padding: clamp(22px, 2.6vw, 34px) clamp(20px, 2.2vw, 28px);
  display: grid;
  gap: 6px;
  align-content: start;
}

.page-products .cat-rail__item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--grad);
  opacity: 0.5;
}

.page-products .cat-rail__letter {
  font-size: var(--fs-2);
  color: var(--violet);
  line-height: 1;
  letter-spacing: 0.04em;
}

.page-products .cat-rail__name {
  margin: 6px 0 0;
  font-family: var(--font-cn);
  font-weight: 800;
  font-size: var(--fs-4);
  color: var(--white);
  letter-spacing: -0.01em;
}

.page-products .cat-rail__en {
  margin: 0;
  color: var(--cyan);
}

.page-products .cat-rail__meta {
  margin: 6px 0 0;
  font-size: var(--fs-6);
  letter-spacing: 0.1em;
  color: var(--amber);
  font-variant-numeric: tabular-nums;
}

.page-products .cat-rail__note {
  margin: 8px 0 0;
  font-size: var(--fs-5);
  line-height: 1.75;
  color: var(--grey);
}

/* ---------- 斜切过渡条 ---------- */
.page-products .cat-slash {
  position: relative;
  height: clamp(56px, 8vw, 108px);
  overflow: hidden;
}

.page-products .cat-slash::before {
  content: "";
  position: absolute;
  inset: -30% -12%;
  background: var(--grad);
  opacity: 0.13;
  transform: rotate(-6deg);
}

/* ---------- 表格块 ---------- */
.page-products .cat-block {
  margin-top: clamp(36px, 5vw, 64px);
}

.page-products .cat-block__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 0;
}

.page-products .cat-block__code {
  font-size: var(--fs-6);
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-products .cat-block__title {
  margin: 0;
  font-family: var(--font-cn);
  font-weight: 800;
  font-size: var(--fs-4);
  color: var(--white);
}

.page-products .cat-block__hint {
  margin: 0 0 0 auto;
  font-size: var(--fs-6);
  letter-spacing: 0.1em;
  color: var(--grey);
}

.page-products .cat-block__foot {
  margin: 14px 0 0;
  font-size: var(--fs-6);
  letter-spacing: 0.06em;
  color: var(--grey);
  line-height: 1.9;
}

.page-products .cat-table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--line);
  border-top: 0;
  background: var(--hold);
}

.page-products .cat-table-wrap:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-products .cat-table {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
  font-size: var(--fs-5);
}

.page-products .cat-table__caption {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.page-products .cat-table th,
.page-products .cat-table td {
  padding: 15px 18px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
  color: var(--white);
}

.page-products .cat-table thead th {
  font-family: var(--font-mono);
  font-size: var(--fs-6);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
  background: #0B0718;
}

.page-products .cat-table tbody tr:nth-child(even) td,
.page-products .cat-table tbody tr:nth-child(even) th {
  background: rgba(20, 10, 46, 0.55);
}

.page-products .cat-table tbody tr.is-emphasis th,
.page-products .cat-table tbody tr.is-emphasis td {
  box-shadow: inset 0 0 0 1px var(--cat-cyan-soft);
}

.page-products .cat-table .num {
  font-family: var(--font-mono);
  text-align: right;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.page-products .cat-table th.cat-tier,
.page-products .cat-table td.cat-tier {
  position: sticky;
  left: 0;
  z-index: 2;
  background: var(--hold);
  border-right: 1px solid var(--line);
}

.page-products .cat-table tbody tr:nth-child(even) th.cat-tier {
  background: #180D36;
}

.page-products .cat-table tbody tr.is-emphasis th.cat-tier {
  background: #1B1040;
}

.page-products .cat-tier__zh {
  display: block;
  font-family: var(--font-cn);
  font-weight: 800;
  color: var(--white);
}

.page-products .cat-tier__en {
  display: block;
  margin-top: 4px;
  font-size: var(--fs-6);
  color: var(--grey);
}

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

/* ---------- 功能清单 ---------- */
.page-products .cat-groups {
  border-top: 1px solid var(--line);
}

.page-products .cat-group {
  border-bottom: 1px solid var(--line);
}

.page-products .cat-group__head {
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 18px;
  padding: 22px 4px;
  background: none;
  border: 0;
  color: var(--white);
  text-align: left;
  cursor: pointer;
  transition: background 200ms var(--ease);
}

.page-products .cat-group__head:hover {
  background: rgba(122, 59, 255, 0.08);
}

.page-products .cat-group__head:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-products .cat-group__arrow {
  width: 0;
  height: 0;
  border-left: 6px solid var(--violet);
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
  transition: transform 220ms var(--ease);
  flex: none;
}

.page-products .cat-group__code {
  font-size: var(--fs-6);
  letter-spacing: 0.14em;
  color: var(--cyan);
  flex: none;
}

.page-products .cat-group__name {
  font-family: var(--font-cn);
  font-weight: 800;
  font-size: var(--fs-4);
  letter-spacing: -0.01em;
}

.page-products .cat-group__en {
  color: var(--grey);
}

.page-products .cat-group__count {
  margin-left: auto;
  font-size: var(--fs-6);
  letter-spacing: 0.1em;
  color: var(--amber);
}

.page-products .cat-feat {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

@media (min-width: 900px) {
  .page-products .cat-feat {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-products .cat-feat__item {
  background: var(--ink);
  padding: 20px clamp(18px, 2vw, 26px);
  display: grid;
  gap: 6px;
  align-content: start;
}

.page-products .cat-feat__code {
  font-size: var(--fs-6);
  letter-spacing: 0.16em;
  color: var(--violet);
}

.page-products .cat-feat__name {
  margin: 0;
  font-family: var(--font-cn);
  font-weight: 700;
  font-size: var(--fs-body);
  color: var(--white);
}

.page-products .cat-feat__desc {
  margin: 0;
  font-size: var(--fs-5);
  line-height: 1.75;
  color: var(--grey);
  max-width: 40ch;
}

.page-products .cat-feat__dep {
  margin: 4px 0 0;
  font-size: var(--fs-6);
  letter-spacing: 0.1em;
  color: var(--cyan);
}

/* ---------- 依赖路径 ---------- */
.page-products .cat-path {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 26px;
}

.page-products .cat-path__node {
  position: relative;
  padding-left: 30px;
  display: grid;
  gap: 5px;
  align-content: start;
}

.page-products .cat-path__dot {
  position: absolute;
  left: 0;
  top: 6px;
  width: 8px;
  height: 8px;
  background: var(--cyan);
  z-index: 1;
}

.page-products .cat-path__node::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 20px;
  bottom: -26px;
  width: 1px;
  background: linear-gradient(180deg, var(--violet), var(--cyan));
}

.page-products .cat-path__node:last-child::before {
  display: none;
}

.page-products .cat-path__code {
  font-size: var(--fs-6);
  letter-spacing: 0.16em;
  color: var(--violet);
}

.page-products .cat-path__name {
  font-family: var(--font-cn);
  font-weight: 800;
  font-size: var(--fs-4);
  color: var(--white);
}

.page-products .cat-path__note {
  font-size: var(--fs-5);
  line-height: 1.75;
  color: var(--grey);
  max-width: 40ch;
}

@media (min-width: 1040px) {
  .page-products .cat-path {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 1px;
    background: var(--line);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
  }

  .page-products .cat-path__node {
    padding: 34px 22px 30px;
    background: var(--ink);
  }

  .page-products .cat-path__node::before {
    left: 0;
    right: 0;
    top: 0;
    bottom: auto;
    width: auto;
    height: 2px;
    background: var(--grad);
  }

  .page-products .cat-path__dot {
    position: static;
    display: block;
    margin-bottom: 12px;
  }
}

.page-products .cat-note {
  margin-top: clamp(32px, 4vw, 52px);
  padding: 22px clamp(20px, 2.4vw, 30px);
  border-left: 2px solid var(--red);
  background: rgba(255, 77, 109, 0.06);
}

.page-products .cat-note__title {
  margin: 0 0 8px;
  font-size: var(--fs-6);
  letter-spacing: 0.18em;
  color: var(--red);
}

.page-products .cat-note p:last-child {
  margin: 0;
  font-size: var(--fs-5);
  line-height: 1.85;
  color: var(--grey);
  max-width: 68ch;
}

/* ---------- 分流表 ---------- */
.page-products .cat-switch {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

@media (min-width: 760px) {
  .page-products .cat-switch {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1180px) {
  .page-products .cat-switch {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-products .cat-switch__item {
  background: var(--ink);
  padding: clamp(22px, 2.6vw, 32px);
  display: grid;
  gap: 8px;
  align-content: start;
}

.page-products .cat-switch__code {
  font-size: var(--fs-6);
  letter-spacing: 0.18em;
  color: var(--violet);
}

.page-products .cat-switch__name {
  margin: 0;
  font-family: var(--font-cn);
  font-weight: 800;
  font-size: var(--fs-4);
}

.page-products .cat-switch__name a {
  color: var(--white);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-products .cat-switch__name a:hover,
.page-products .cat-switch__name a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-products .cat-switch__desc {
  margin: 0;
  font-size: var(--fs-5);
  line-height: 1.8;
  color: var(--grey);
  max-width: 42ch;
}

/* ---------- 降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-products .cat-group__arrow,
  .page-products .cat-group__head,
  .page-products .breadcrumb a,
  .page-products .cat-switch__name a {
    transition: none;
  }
}