.page-products {
  --pf-pad: clamp(18px, 2.6vw, 30px);
  --pf-gap: clamp(14px, 2vw, 22px);
  --pf-sec: clamp(34px, 5.4vw, 68px);
  overflow-x: clip;
}

.page-products .pf-head {
  padding-top: clamp(16px, 3vw, 34px);
  padding-bottom: clamp(24px, 4vw, 46px);
  border-bottom: var(--rule);
}

.page-products .pf-head .page-title {
  max-width: 16ch;
  margin-top: 10px;
}

.page-products .pf-head .page-lede {
  max-width: 62ch;
  margin-top: clamp(14px, 2vw, 20px);
}

.page-products .pf-head__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(18px, 2.6vw, 28px);
}

.page-products .psec {
  padding-block: var(--pf-sec);
}

.page-products .psec + .psec {
  border-top: var(--rule);
}

.page-products .psec--sand {
  background: var(--sand);
  border-top: 0;
}

.page-products .psec--mist {
  background: var(--mist);
  border-top: 0;
}

.page-products .psec--end {
  border-top: var(--rule);
}

.page-products .psec__lede {
  max-width: 60ch;
  margin-top: 12px;
  color: var(--graphite);
}

.page-products .figure {
  margin: clamp(20px, 3vw, 32px) 0 0;
}

.page-products .figure--flush {
  margin-top: 0;
}

.page-products .figure--tail {
  margin-top: clamp(22px, 3.4vw, 38px);
}

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

.page-products .figure__caption {
  margin-top: 10px;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--graphite);
  border-left: 2px solid var(--brick-soft);
  padding-left: 10px;
}

/* ---------- 三条版本线 ---------- */
.page-products .lanes {
  display: grid;
  gap: 10px;
  margin-top: clamp(18px, 2.6vw, 26px);
}

.page-products .lane {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: var(--pf-pad);
  background: var(--indigo);
  color: var(--paper);
  border: 1px solid var(--indigo-mid);
  overflow: hidden;
  transition: background-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-products .lane::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 5px;
  background: var(--brick);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur) var(--ease);
}

.page-products .lane:hover::after,
.page-products .lane:focus-within::after {
  transform: scaleX(1);
}

.page-products .lane--stable {
  background: var(--ink);
  border-color: var(--ink);
}

.page-products .lane--compat {
  background: var(--indigo-mid);
  border-color: var(--indigo-mid);
}

.page-products .lane--lite {
  background: var(--sand);
  border-color: var(--indigo-mid);
  color: var(--ink);
}

.page-products .lane:hover {
  background: var(--ink);
}

.page-products .lane--compat:hover {
  background: var(--indigo);
}

.page-products .lane--lite:hover {
  background: var(--paper);
}

.page-products .lane__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.page-products .lane__idx {
  font-size: 12px;
  letter-spacing: 0.14em;
  opacity: 0.72;
}

.page-products .lane__name {
  font-size: clamp(40px, 6vw, 58px);
  line-height: 0.9;
  letter-spacing: -0.02em;
  font-weight: 300;
  margin: 2px 0 0;
}

.page-products .lane__lead {
  font-size: 14.5px;
  line-height: 1.7;
  opacity: 0.92;
}

.page-products .lane__spec {
  margin: 4px 0 0;
  border-top: 1px solid currentColor;
  border-top-color: rgba(251, 247, 240, 0.28);
}

.page-products .lane--lite .lane__spec {
  border-top-color: rgba(20, 37, 63, 0.22);
}

.page-products .lane__row {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 9px 0;
  border-bottom: 1px solid rgba(251, 247, 240, 0.14);
}

.page-products .lane--lite .lane__row {
  border-bottom-color: rgba(20, 37, 63, 0.14);
}

.page-products .lane__row:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-products .lane__row dt {
  font-size: 11.5px;
  letter-spacing: 0.12em;
  opacity: 0.7;
}

.page-products .lane__row dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
}

.page-products .lanes__note {
  margin-top: 16px;
  font-size: 14px;
  color: var(--graphite);
  padding-left: 12px;
  border-left: 3px solid var(--brick);
}

/* ---------- 分段切换 ---------- */
.page-products .segmented {
  margin-top: clamp(18px, 2.6vw, 26px);
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border-bottom: 1px solid var(--indigo-mid);
}

.page-products .segmented__btn {
  flex: 1 1 auto;
  min-width: 120px;
  padding: 12px 14px;
  background: transparent;
  border: 0;
  border-bottom: 3px solid transparent;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  color: var(--indigo);
  cursor: pointer;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-products .segmented__btn:hover {
  color: var(--brick);
}

.page-products .segmented__btn[aria-selected="true"] {
  color: var(--brick);
  border-bottom-color: var(--brick);
}

.page-products .segmented__btn:focus-visible {
  outline: 2px solid var(--indigo-mid);
  outline-offset: -2px;
}

.page-products .seg-panel {
  padding-top: clamp(16px, 2.4vw, 24px);
}

.page-products .seg-panel__row {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px dotted var(--line);
}

.page-products .seg-panel__row:last-child {
  border-bottom: 0;
}

.page-products .seg-panel__k {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--brick);
  font-weight: 500;
}

.page-products .seg-panel__row p {
  font-size: 15px;
  line-height: 1.75;
}

/* ---------- 归档 ---------- */
.page-products .archive-intro {
  display: grid;
  gap: var(--pf-gap);
  margin-top: clamp(20px, 3vw, 30px);
}

.page-products .archive-steps__title {
  font-size: clamp(17px, 2vw, 20px);
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 12px;
}

.page-products .steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-products .steps__item {
  display: grid;
  grid-template-columns: 30px 1fr;
  gap: 12px;
  align-items: start;
}

.page-products .steps__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  font-size: 12.5px;
  color: var(--paper);
  background: var(--brick);
  border-radius: 2px;
}

.page-products .steps__item p {
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--ink);
}

.page-products .archive {
  max-width: 720px;
  margin: clamp(26px, 4vw, 40px) auto 0;
}

.page-products .archive-year {
  border: 0;
  border-top: 1px solid var(--line);
  background: transparent;
}

.page-products .archive-year:last-of-type {
  border-bottom: 1px solid var(--line);
}

.page-products .fold__summary {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 2px;
  cursor: pointer;
  list-style: none;
  transition: color var(--dur) var(--ease);
}

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

.page-products .fold__summary:hover {
  color: var(--brick);
}

.page-products .fold__summary:focus-visible {
  outline: 2px solid var(--indigo-mid);
  outline-offset: 2px;
}

.page-products .archive-year__label {
  font-size: clamp(20px, 2.6vw, 26px);
  letter-spacing: 0.02em;
  font-weight: 400;
}

.page-products .archive-year__meta {
  font-size: 12.5px;
  color: var(--graphite);
  letter-spacing: 0.06em;
}

.page-products .fold__body {
  padding: 4px 2px 18px;
}

.page-products .archive-group {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--indigo-mid);
  font-weight: 500;
  margin: 16px 0 6px;
  padding-bottom: 5px;
  border-bottom: 1px dotted var(--line);
}

.page-products .archive-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-products .archive-item {
  display: grid;
  grid-template-columns: 26px 54px 1fr;
  gap: 10px;
  align-items: baseline;
  padding: 8px 0;
  border-bottom: 1px dotted var(--line);
}

.page-products .archive-item:last-child {
  border-bottom: 0;
}

.page-products .archive-num {
  font-size: 11.5px;
  color: var(--brick);
}

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

.page-products .archive-note {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--graphite);
}

/* ---------- 检查清单 ---------- */
.page-products .check-layout {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
  margin-top: clamp(20px, 3vw, 30px);
}

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

.page-products .checks__item {
  display: grid;
  grid-template-columns: 24px 1fr;
  gap: 12px;
  align-items: start;
  padding: 14px 14px 14px 12px;
  background: var(--paper);
  border-left: 3px solid transparent;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-products .checks__item:hover {
  border-left-color: var(--brick-soft);
}

.page-products .checks__box {
  appearance: none;
  -webkit-appearance: none;
  inline-size: 21px;
  block-size: 21px;
  margin: 2px 0 0;
  border: 1.5px solid var(--indigo-mid);
  border-radius: 3px;
  background: var(--paper);
  position: relative;
  cursor: pointer;
  flex: none;
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-products .checks__box:checked {
  background: var(--brick);
  border-color: var(--brick);
}

.page-products .checks__box:checked::after {
  content: "";
  position: absolute;
  left: 6px;
  top: 2px;
  width: 6px;
  height: 11px;
  border: solid var(--paper);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.page-products .checks__box:focus-visible {
  outline: 2px solid var(--indigo);
  outline-offset: 2px;
}

.page-products .checks__label {
  display: grid;
  gap: 3px;
  cursor: pointer;
}

.page-products .checks__title {
  font-size: 15px;
  font-weight: 500;
  color: var(--ink);
}

.page-products .checks__desc {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--graphite);
}

.page-products .checks__box:checked ~ .checks__label .checks__title {
  color: var(--brick);
}

.page-products .checks__keep {
  margin-top: 12px;
  font-size: 12.5px;
  color: var(--graphite);
}

/* ---------- 校验 ---------- */
.page-products .hash-layout {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
  margin-top: clamp(20px, 3vw, 30px);
}

.page-products .steps--tight {
  gap: 14px;
}

.page-products .notice {
  margin-top: 20px;
  padding: 16px 16px 16px 18px;
  background: var(--mist);
  border-left: 3px solid var(--brick);
}

.page-products .notice__title {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--indigo);
  margin-bottom: 6px;
}

.page-products .notice p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink);
}

/* ---------- 装不上的四类原因 ---------- */
.page-products .reasons {
  display: grid;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 28px);
}

.page-products .reason {
  position: relative;
  padding: 20px 18px 18px;
  background: var(--paper);
  border: 1px solid var(--line);
}

.page-products .reason__idx {
  display: inline-block;
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--paper);
  background: var(--indigo);
  padding: 2px 7px;
  margin-bottom: 10px;
}

.page-products .reason__title {
  font-size: 16px;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 6px;
}

.page-products .reason p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--graphite);
}

.page-products .reasons__more {
  margin-top: 18px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink);
}

.page-products .inline-link {
  color: var(--indigo-mid);
  text-decoration: none;
  border-bottom: 1px solid var(--indigo-mid);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-products .inline-link:hover {
  color: var(--brick);
  border-bottom-color: var(--brick);
}

/* ---------- 收尾 ---------- */
.page-products .endbar {
  display: grid;
  gap: 20px;
  padding-top: 4px;
}

.page-products .endbar__title {
  font-size: clamp(20px, 2.6vw, 27px);
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 10px;
}

.page-products .endbar__copy p {
  max-width: 58ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--graphite);
}

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

/* ---------- 断点 ---------- */
@media (min-width: 700px) {
  .page-products .reasons {
    grid-template-columns: 1fr 1fr;
  }

  .page-products .archive-intro {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }

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

@media (min-width: 780px) {
  .page-products .lanes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-products .lane {
    min-height: 100%;
  }

  .page-products .seg-panel__row {
    grid-template-columns: 84px minmax(0, 1fr);
    gap: 16px;
    align-items: baseline;
  }

  .page-products .check-layout {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-products .hash-layout {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }
}

@media (min-width: 1020px) {
  .page-products .pf-head .page-title {
    font-size: clamp(52px, 6.2vw, 82px);
  }

  .page-products .archive-item {
    grid-template-columns: 32px 62px minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products .lane,
  .page-products .lane::after,
  .page-products .segmented__btn,
  .page-products .checks__item,
  .page-products .checks__box,
  .page-products .inline-link {
    transition: none;
  }
}