.page-products {
  --prod-rail-w: 210px;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  padding-bottom: clamp(44px, 6vw, 92px);
  overflow-x: clip;
}

.page-products .prod-crumb {
  padding-top: clamp(12px, 2vw, 20px);
  font-size: var(--fs-12);
}

/* 首屏 */
.page-products .prod-mast {
  position: relative;
  margin-top: clamp(12px, 2vw, 22px);
  background: var(--grass);
  color: var(--paper);
  padding-block: clamp(26px, 4.2vw, 58px) clamp(24px, 3.6vw, 48px);
  border-bottom: 3px solid var(--flame);
  overflow: hidden;
}

.page-products .prod-mast::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(90deg, rgba(244, 239, 227, .07) 0 1px, transparent 1px 92px);
  pointer-events: none;
}

.page-products .prod-mast .container {
  position: relative;
  z-index: 1;
}

.page-products .prod-mast__eyebrow {
  color: var(--sky-light);
  letter-spacing: .2em;
}

.page-products .prod-mast__title {
  margin: clamp(10px, 1.6vw, 18px) 0 0;
  font-family: var(--font-display);
  font-size: clamp(32px, 6vw, 66px);
  line-height: .98;
  letter-spacing: -.02em;
  font-weight: 700;
  max-width: 18ch;
}

.page-products .prod-mast__lede {
  margin-top: clamp(12px, 1.8vw, 20px);
  max-width: 62ch;
  font-size: clamp(15px, 1.35vw, 17px);
  line-height: 1.78;
  color: rgba(244, 239, 227, .86);
}

.page-products .prod-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(22px, 3vw, 36px) 0 0;
  background: rgba(244, 239, 227, .22);
  border: 1px solid rgba(244, 239, 227, .22);
}

.page-products .prod-facts__item {
  background: var(--grass);
  padding: 13px 15px 15px;
}

.page-products .prod-facts dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: rgba(244, 239, 227, .68);
}

.page-products .prod-facts dd {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(19px, 2.4vw, 26px);
  line-height: 1.1;
  color: var(--paper);
}

.page-products .prod-facts dd span {
  display: inline-block;
  margin-left: 6px;
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--flame);
}

/* 主体：左栏索引 + 右侧台阶内容 */
.page-products .prod-body {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
  padding-top: clamp(26px, 4vw, 52px);
}

.page-products .prod-rail {
  border-top: 2px solid var(--grass);
  padding-top: 12px;
}

.page-products .prod-rail__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--grass);
}

.page-products .prod-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-products .prod-rail__list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 8px 9px 0;
  border-bottom: var(--hair);
  color: var(--ink);
  text-decoration: none;
  font-size: var(--fs-14);
  transition: color .2s ease, padding-left .2s ease;
}

.page-products .prod-rail__list a span {
  font-size: 11px;
  color: var(--flame-deep);
  letter-spacing: .08em;
}

.page-products .prod-rail__list a:hover {
  color: var(--sky-deep);
  padding-left: 6px;
}

.page-products .prod-rail__note {
  margin: 16px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: #4b5751;
  border-left: 2px solid var(--sand);
  padding-left: 10px;
}

/* 章节 */
.page-products .prod-sec {
  border-top: var(--hair);
  padding-top: clamp(20px, 3vw, 32px);
  margin-top: clamp(26px, 3.6vw, 46px);
}

.page-products .prod-sec:first-child {
  margin-top: 0;
  border-top: 0;
  padding-top: 0;
}

.page-products .prod-sec__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
}

.page-products .prod-sec__num {
  flex: none;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--flame);
  padding-top: 4px;
}

.page-products .prod-sec__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.5vw, 28px);
  line-height: 1.22;
  letter-spacing: -.01em;
  font-weight: 700;
}

.page-products .prod-sec__lede {
  margin: 14px 0 0;
  max-width: 72ch;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: #2c3a34;
}

/* 01 三区 */
.page-products .prod-split {
  display: grid;
  gap: clamp(18px, 2.6vw, 32px);
  margin-top: clamp(16px, 2.4vw, 26px);
}

.page-products .prod-zone-list {
  list-style: none;
  margin: clamp(16px, 2vw, 22px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-products .prod-zone {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 12px;
  padding-top: 12px;
  border-top: var(--hair);
}

.page-products .prod-zone__key {
  height: 26px;
  display: grid;
  place-items: center;
  font-size: 12px;
  color: var(--flame);
  border: 1px solid rgba(232, 106, 42, .55);
}

.page-products .prod-zone h3 {
  margin: 0 0 5px;
  font-size: var(--fs-16);
  font-weight: 700;
  line-height: 1.4;
}

.page-products .prod-zone p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.72;
  color: #3b4a43;
}

.page-products .prod-figure,
.page-products .prod-shot,
.page-products .prod-strip {
  margin: 0;
}

.page-products .prod-figure img,
.page-products .prod-shot img,
.page-products .prod-strip img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid rgba(93, 98, 91, .45);
  background: var(--grass);
  object-fit: cover;
}

.page-products .prod-figure .figure-caption,
.page-products .prod-shot .figure-caption,
.page-products .prod-strip .figure-caption {
  margin-top: 8px;
  display: block;
}

/* 线框示意 */
.page-products .prod-wire {
  margin-top: clamp(18px, 2.4vw, 28px);
  padding: clamp(12px, 1.8vw, 20px);
  border: 1px solid rgba(93, 98, 91, .35);
  background: rgba(216, 203, 180, .42);
  color: var(--line);
}

.page-products .prod-wire svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-products .prod-wire text {
  fill: var(--ink);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
}

.page-products .prod-wire .figure-caption {
  margin-top: 10px;
  display: block;
}

/* 02 第二栏 */
.page-products .prod-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: clamp(14px, 2vw, 20px);
}

.page-products .prod-tab {
  display: inline-block;
  padding: 7px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--ink);
  text-decoration: none;
  border: 1px solid rgba(93, 98, 91, .5);
  transition: background .2s ease, color .2s ease, border-color .2s ease;
}

.page-products .prod-tab:hover {
  background: var(--grass);
  border-color: var(--grass);
  color: var(--paper);
}

.page-products .prod-block {
  margin-top: clamp(20px, 2.6vw, 30px);
  padding-top: clamp(16px, 2.2vw, 24px);
  border-top: var(--hair);
}

.page-products .prod-block__inner {
  display: grid;
  gap: clamp(16px, 2.4vw, 28px);
}

.page-products .prod-block h3 {
  margin: 10px 0 8px;
  font-family: var(--font-display);
  font-size: clamp(19px, 2.1vw, 24px);
  line-height: 1.28;
  letter-spacing: -.01em;
}

.page-products .prod-block p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.78;
  color: #2c3a34;
}

.page-products .prod-pair {
  margin-top: 14px;
  padding-left: 14px;
  border-left: 2px solid var(--flame);
}

.page-products .prod-pair h4 {
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--grass);
}

.page-products .prod-shot {
  position: relative;
}

.page-products .prod-shot__badge {
  position: absolute;
  right: 10px;
  bottom: 42px;
  padding: 4px 9px;
  background: var(--flame);
  color: var(--paper);
  font-size: 12px;
  letter-spacing: .12em;
}

.page-products .prod-shot--small .prod-shot__badge {
  bottom: 40px;
}

.page-products .prod-entry {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-products .prod-entry li {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding-bottom: 9px;
  border-bottom: 1px dotted rgba(93, 98, 91, .5);
  font-size: var(--fs-14);
  line-height: 1.68;
  color: #2c3a34;
}

.page-products .prod-entry__k {
  flex: none;
  min-width: 62px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--sky-deep);
}

.page-products .prod-switch {
  display: grid;
  gap: 10px;
  margin-top: 16px;
}

.page-products .prod-switch__cell {
  padding: 12px 14px;
  border: 1px solid rgba(93, 98, 91, .38);
  background: rgba(216, 203, 180, .34);
}

.page-products .prod-switch__cell h4 {
  margin: 0 0 5px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--flame-deep);
}

.page-products .prod-switch__cell p {
  font-size: var(--fs-14);
  line-height: 1.7;
}

/* 03 关注与提醒 */
.page-products .prod-notes {
  display: grid;
  gap: 12px;
  margin-top: clamp(16px, 2.2vw, 24px);
}

.page-products .prod-note {
  border: 1px solid rgba(93, 98, 91, .35);
  background: rgba(216, 203, 180, .3);
  padding: 14px 16px 16px;
}

.page-products .prod-note__k {
  display: inline-block;
  margin-bottom: 10px;
  padding: 2px 8px;
  border: 1px solid rgba(232, 106, 42, .5);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--flame-deep);
}

.page-products .prod-note h3 {
  margin: 0 0 6px;
  font-size: var(--fs-16);
  line-height: 1.42;
}

.page-products .prod-note p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.72;
  color: #2c3a34;
}

.page-products .prod-callout {
  margin-top: 16px;
  padding: 14px 16px;
  border-left: 3px solid var(--sky);
  background: rgba(43, 140, 158, .1);
}

.page-products .prod-callout p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.78;
  color: #22322c;
}

.page-products .prod-callout a {
  color: var(--sky-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-products .prod-callout--quiet {
  border-left-color: var(--sand);
  background: rgba(216, 203, 180, .32);
}

/* 04 三套用法 */
.page-products .prod-stage {
  display: grid;
  gap: 12px;
  margin-top: clamp(16px, 2.2vw, 24px);
}

.page-products .prod-stage__col {
  padding: 16px;
  border: 1px solid rgba(93, 98, 91, .34);
  background: rgba(244, 239, 227, .9);
}

.page-products .prod-stage__tag {
  display: inline-block;
  padding: 3px 9px;
  background: var(--grass);
  color: var(--paper);
  font-size: 11px;
  letter-spacing: .2em;
}

.page-products .prod-stage__col:nth-child(2) .prod-stage__tag {
  background: var(--sky-deep);
}

.page-products .prod-stage__col:nth-child(3) .prod-stage__tag {
  background: var(--flame-deep);
}

.page-products .prod-stage__col h3 {
  margin: 12px 0 10px;
  font-size: var(--fs-16);
  line-height: 1.4;
}

.page-products .prod-stage__col ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-products .prod-stage__col li {
  position: relative;
  padding-left: 16px;
  font-size: var(--fs-14);
  line-height: 1.68;
  color: #2c3a34;
}

.page-products .prod-stage__col li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 6px;
  height: 6px;
  background: var(--bright);
}

.page-products .prod-strip {
  margin-top: clamp(16px, 2.2vw, 24px);
}

/* 05 版本 */
.page-products .prod-version {
  display: grid;
  gap: clamp(16px, 2.4vw, 26px);
  margin-top: clamp(16px, 2.2vw, 24px);
}

.page-products .prod-table-wrap {
  overflow-x: auto;
}

.page-products .prod-table {
  width: 100%;
  min-width: 460px;
  border-collapse: collapse;
  font-size: var(--fs-14);
}

.page-products .prod-table th {
  padding: 8px 12px 8px 0;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--grass);
  border-bottom: 1px solid var(--line);
}

.page-products .prod-table td {
  padding: 12px 12px 12px 0;
  vertical-align: top;
  line-height: 1.68;
  color: #2c3a34;
  border-bottom: 1px solid rgba(93, 98, 91, .3);
}

.page-products .prod-table td:first-child {
  white-space: nowrap;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--flame-deep);
}

.page-products .prod-shot--small img {
  border-color: rgba(93, 98, 91, .5);
}

/* 06 清单 */
.page-products .prod-check {
  list-style: none;
  counter-reset: prodstep;
  margin: clamp(14px, 2vw, 22px) 0 0;
  padding: 0;
}

.page-products .prod-check li {
  counter-increment: prodstep;
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr);
  gap: 14px;
  padding: 14px 0;
  border-bottom: var(--hair);
}

.page-products .prod-check li::before {
  content: counter(prodstep, decimal-leading-zero);
  display: grid;
  place-items: center;
  width: 34px;
  height: 26px;
  background: var(--grass);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
}

.page-products .prod-check h3 {
  margin: 0 0 5px;
  font-size: var(--fs-16);
  line-height: 1.42;
}

.page-products .prod-check p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.72;
  color: #3b4a43;
}

.page-products .prod-cta {
  display: grid;
  gap: 14px;
  margin-top: clamp(22px, 3vw, 34px);
  padding: clamp(20px, 3vw, 32px);
  background: var(--ink);
  color: var(--paper);
}

.page-products .prod-cta p {
  margin: 0;
  max-width: 62ch;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: rgba(244, 239, 227, .88);
}

.page-products .prod-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* 相关入口 */
.page-products .prod-links {
  display: grid;
  gap: 1px;
  margin-top: clamp(20px, 2.6vw, 30px);
  background: rgba(93, 98, 91, .35);
  border: 1px solid rgba(93, 98, 91, .35);
}

.page-products .prod-links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 13px 15px;
  background: var(--paper);
  color: var(--ink);
  text-decoration: none;
  font-size: var(--fs-14);
  transition: background .2s ease, color .2s ease;
}

.page-products .prod-links a span {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--flame);
}

.page-products .prod-links a:hover {
  background: var(--sand);
}

@media (min-width: 640px) {
  .page-products .prod-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

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

@media (min-width: 820px) {
  .page-products .prod-split {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-products .prod-block__inner {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
    align-items: start;
  }

  .page-products .prod-block__inner--rev {
    grid-template-columns: minmax(0, .94fr) minmax(0, 1.06fr);
  }

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

  .page-products .prod-stage {
    grid-template-columns: 1fr .86fr 1.14fr;
    gap: 0;
    border: 1px solid rgba(93, 98, 91, .34);
  }

  .page-products .prod-stage__col {
    border: 0;
    border-left: 1px solid rgba(93, 98, 91, .3);
    padding: 18px 20px 20px;
    background: transparent;
  }

  .page-products .prod-stage__col:first-child {
    border-left: 0;
  }

  .page-products .prod-version {
    grid-template-columns: minmax(0, 1.32fr) minmax(0, .68fr);
    align-items: start;
  }

  .page-products .prod-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }

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

@media (min-width: 1040px) {
  .page-products .prod-body {
    grid-template-columns: var(--prod-rail-w) minmax(0, 1fr);
    column-gap: clamp(30px, 4vw, 62px);
    align-items: start;
  }

  .page-products .prod-rail {
    position: sticky;
    top: 96px;
  }

  .page-products .prod-mast__title {
    max-width: 20ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products .prod-tab,
  .page-products .prod-links a,
  .page-products .prod-rail__list a {
    transition: none;
  }

  .page-products .prod-rail__list a:hover {
    padding-left: 0;
  }
}