.page-products {
  --cat-radius: 2px;
}

/* ============ 首屏 ============ */

.page-products .cat-hero__title {
  margin: 10px 0 0;
  line-height: .94;
  letter-spacing: -.02em;
}

.page-products .cat-hero__lead {
  max-width: 66ch;
  margin: 22px 0 0;
  font-size: clamp(16px, 1.4vw, 18px);
  line-height: 1.8;
  color: var(--graphite);
}

.page-products .cat-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 32px;
  background: var(--line-strong);
  border: 1px solid var(--line-strong);
  border-radius: var(--cat-radius);
  overflow: hidden;
}

@media (min-width: 720px) {
  .page-products .cat-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin-top: 40px;
  }
}

.page-products .cat-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 18px;
  background: var(--paper);
}

.page-products .cat-stat:nth-child(2) {
  background: var(--paper-2);
}

.page-products .cat-stat:nth-child(4) {
  background: var(--paper-2);
}

.page-products .cat-stat__num {
  font-size: clamp(26px, 3vw, 34px);
  font-weight: 700;
  line-height: 1;
  color: var(--ink);
}

.page-products .cat-stat:nth-child(1) .cat-stat__num,
.page-products .cat-stat:nth-child(3) .cat-stat__num {
  color: var(--cyan-deep);
}

.page-products .cat-stat__label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--graphite);
}

.page-products .cat-hero__figure {
  margin-top: 12px;
}

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

/* ============ 两栏骨架 ============ */

.page-products .cat-rail-layout {
  display: grid;
  gap: 32px;
  margin-top: 56px;
}

@media (min-width: 1000px) {
  .page-products .cat-rail-layout {
    grid-template-columns: 210px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }
}

.page-products .cat-rail {
  align-self: start;
  min-width: 0;
}

@media (min-width: 1000px) {
  .page-products .cat-rail__sticky {
    position: sticky;
    top: 104px;
  }
}

.page-products .cat-rail__title {
  margin: 0 0 12px;
  padding-bottom: 8px;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--graphite);
  border-bottom: 2px solid var(--ink);
}

.page-products .cat-rail__list {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

@media (min-width: 1000px) {
  .page-products .cat-rail__list {
    flex-direction: column;
    gap: 0;
    padding-bottom: 0;
    overflow: visible;
  }
}

.page-products .cat-rail__list a {
  display: block;
  padding: 9px 12px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--graphite);
  text-decoration: none;
  white-space: nowrap;
  border-left: 3px solid transparent;
  border-bottom: 2px solid transparent;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

@media (min-width: 1000px) {
  .page-products .cat-rail__list a {
    white-space: normal;
    border-bottom-color: transparent;
    border-left-color: var(--line-strong);
  }
}

.page-products .cat-rail__list a:hover,
.page-products .cat-rail__list a[aria-current="true"] {
  color: var(--ink);
  background: var(--cyan-soft);
  border-left-color: var(--cyan-deep);
}

@media (max-width: 999px) {
  .page-products .cat-rail__list a[aria-current="true"] {
    border-left-color: transparent;
    border-bottom-color: var(--cyan-deep);
  }
}

.page-products .cat-main {
  min-width: 0;
}

/* ============ 区块公共 ============ */

.page-products .cat-block + .cat-block {
  margin-top: 32px;
}

.page-products .cat-lede {
  max-width: 70ch;
  margin: 18px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--graphite);
}

.page-products .cat-lede--tight {
  margin-top: 22px;
  padding-left: 16px;
  border-left: 3px solid var(--cyan);
}

.page-products .cat-subtitle {
  margin: 36px 0 0;
  font-size: 20px;
  font-weight: 700;
  color: var(--ink);
}

.page-products .cat-subnote {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--graphite);
}

.page-products .cat-figure {
  margin: 28px 0 0;
}

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

/* ============ 区间筛选 ============ */

.page-products .cat-filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  margin: 26px 0 14px;
  padding: 12px 16px;
  background: var(--paper-2);
  border-left: 3px solid var(--cyan);
}

.page-products .cat-filter__label {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--graphite);
}

.page-products .cat-filter__btns {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-products .cat-chip {
  appearance: none;
  -webkit-appearance: none;
  padding: 6px 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.4;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line-strong);
  border-radius: 0;
  cursor: pointer;
  clip-path: polygon(7px 0, 100% 0, 100% calc(100% - 7px), calc(100% - 7px) 100%, 0 100%, 0 7px);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-products .cat-chip:hover {
  border-color: var(--ink);
  background: var(--cyan-soft);
}

.page-products .cat-chip.is-active {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

/* ============ 表格 ============ */

.page-products .cat-table {
  min-width: 620px;
}

.page-products .cat-table--halls {
  min-width: 560px;
}

.page-products .cat-table tbody th[scope="row"] {
  border-left: 3px solid var(--amber);
  font-weight: 700;
  text-align: left;
}

.page-products .cat-table--halls tbody th[scope="row"] {
  border-left-color: var(--cyan-deep);
}

.page-products .cat-table tbody tr {
  transition: background var(--dur) var(--ease);
}

.page-products .cat-table tbody tr:hover {
  background: var(--cyan-soft);
}

/* ============ 逐档注释 ============ */

.page-products .cat-notes {
  display: grid;
  gap: 8px;
  margin-top: 16px;
}

.page-products .cat-note {
  background: var(--paper);
}

.page-products .cat-note__dl {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  margin: 0;
}

@media (min-width: 640px) {
  .page-products .cat-note__dl {
    grid-template-columns: 60px minmax(0, 1fr);
    column-gap: 16px;
  }
}

.page-products .cat-note__dl dt {
  align-self: start;
  font-size: 12px;
  letter-spacing: .14em;
  line-height: 1.7;
  color: var(--cyan-deep);
}

.page-products .cat-note__dl dd {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--graphite);
}

.page-products .cat-note__dl dd:last-child {
  margin-bottom: 0;
}

/* ============ 字段卡片 ============ */

.page-products .cat-fields {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 26px;
}

@media (min-width: 560px) {
  .page-products .cat-fields {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 980px) {
  .page-products .cat-fields {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-products .cat-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-top: 3px solid var(--cyan);
  border-radius: var(--cat-radius);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-products .cat-field:hover {
  background: var(--paper-2);
  border-top-color: var(--amber);
}

.page-products .cat-field__name {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
}

.page-products .cat-field__desc {
  flex: 1;
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--graphite);
}

.page-products .cat-field__code {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--cyan-deep);
}

/* ============ 返水步骤 ============ */

.page-products .cat-steps {
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-products .cat-step {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 16px;
  padding: 22px 0;
  border-top: 1px solid var(--line);
}

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

@media (min-width: 720px) {
  .page-products .cat-step {
    grid-template-columns: 72px minmax(0, 1fr);
    gap: 24px;
  }
}

.page-products .cat-step__num {
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 700;
  line-height: 1;
  color: var(--amber);
}

.page-products .cat-step__body h3 {
  margin: 0 0 8px;
  font-size: 19px;
  font-weight: 700;
  color: var(--ink);
}

.page-products .cat-step__body p {
  max-width: 66ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--graphite);
}

.page-products .cat-example {
  display: grid;
  gap: 8px;
  margin-top: 28px;
  padding: 20px 22px;
  background: var(--amber-soft);
  border-left: 3px solid var(--amber);
}

.page-products .cat-example__label {
  margin: 0;
}

.page-products .cat-example__text {
  max-width: 68ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

/* ============ 冷却刻度 ============ */

.page-products .cat-gauge {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 6px;
  margin-top: 18px;
  padding: 20px 12px 16px;
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: var(--cat-radius);
}

@media (min-width: 720px) {
  .page-products .cat-gauge {
    gap: 12px;
    padding: 24px 20px 18px;
  }
}

.page-products .cat-gauge__col {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  min-width: 0;
}

.page-products .cat-gauge__track {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  width: 100%;
  height: 110px;
}

@media (min-width: 720px) {
  .page-products .cat-gauge__track {
    height: 140px;
  }
}

.page-products .cat-gauge__bar {
  width: 64%;
  max-width: 38px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--cyan-deep) 100%);
  border-radius: 2px 2px 0 0;
}

.page-products .cat-gauge__col:nth-child(1) .cat-gauge__bar { height: 14%; }
.page-products .cat-gauge__col:nth-child(2) .cat-gauge__bar { height: 26%; }
.page-products .cat-gauge__col:nth-child(3) .cat-gauge__bar { height: 44%; }
.page-products .cat-gauge__col:nth-child(4) .cat-gauge__bar { height: 62%; }
.page-products .cat-gauge__col:nth-child(5) .cat-gauge__bar { height: 82%; }
.page-products .cat-gauge__col:nth-child(6) .cat-gauge__bar { height: 100%; background: linear-gradient(180deg, var(--amber) 0%, var(--amber) 100%); }

.page-products .cat-gauge__hall {
  font-size: 12px;
  color: var(--ink);
}

.page-products .cat-gauge__time {
  font-size: 11px;
  color: var(--graphite);
}

/* ============ 教程入口 ============ */

.page-products .cat-paths {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 26px;
}

@media (min-width: 620px) {
  .page-products .cat-paths {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-products .cat-path {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 20px;
  color: inherit;
  text-decoration: none;
  background: var(--paper);
  border: 1px solid var(--line);
  border-left: 4px solid var(--cyan-deep);
  border-radius: var(--cat-radius);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-products .cat-path:hover {
  background: var(--paper-2);
  border-left-color: var(--amber);
}

.page-products .cat-path__count {
  align-self: flex-start;
  padding: 3px 9px;
  font-size: 12px;
  color: var(--ink);
  background: var(--cyan-soft);
}

.page-products .cat-path__name {
  margin: 0;
  font-size: 19px;
  font-weight: 700;
  color: var(--ink);
}

.page-products .cat-path__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--graphite);
}

/* ============ 收尾 ============ */

.page-products .cat-cta__inner {
  display: grid;
  gap: 24px;
}

@media (min-width: 860px) {
  .page-products .cat-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 48px;
  }
}

.page-products .cat-cta__copy h2 {
  margin: 0;
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1.25;
}

.page-products .cat-cta__copy p {
  max-width: 62ch;
  margin: 12px 0 0;
  font-size: 16px;
  line-height: 1.8;
}

.page-products .cat-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}