.page-products {
  --pd-r: var(--r-md);
  --pd-edge: 1px solid var(--line);
  color: var(--text);
  padding-bottom: 64px;
}

.page-products .breadcrumb {
  margin: 22px 0 0;
}

/* ---------- 首屏 ---------- */

.page-products .pd-hero {
  padding: 26px 0 0;
}

.page-products .pd-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 9vw, 76px);
  line-height: 1.05;
  letter-spacing: -0.01em;
  margin: 10px 0 0;
  max-width: 16ch;
}

.page-products .pd-hero__lede {
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--text);
  max-width: 36em;
}

/* ---------- 分类码索引网格 ---------- */

.page-products .pd-codes {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.page-products .pd-code {
  min-width: 0;
}

.page-products .pd-code__link {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-height: 136px;
  padding: 16px 16px 14px;
  border: var(--pd-edge);
  border-radius: var(--pd-r);
  background: linear-gradient(158deg, var(--ink-2) 0%, var(--surface) 100%);
  text-decoration: none;
  color: inherit;
  transition: transform var(--dur) ease, border-color var(--dur) ease, background-color var(--dur) ease;
}

.page-products .pd-code__key {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 34px;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--lime);
}

.page-products .pd-code__name {
  font-weight: 700;
  font-size: 17px;
  color: var(--text);
}

.page-products .pd-code__use {
  font-size: 14px;
  line-height: 1.62;
  color: var(--muted);
}

.page-products .pd-code__peek {
  margin-top: auto;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.6;
  color: var(--lime);
  transition: max-height var(--dur) ease, opacity var(--dur) ease;
}

.page-products .pd-code__link:hover,
.page-products .pd-code__link:focus-visible {
  transform: translateY(-2px);
  border-color: var(--line-hi);
  background: var(--surface-hi);
  outline: none;
}

.page-products .pd-code__link:focus-visible {
  box-shadow: 0 0 0 2px var(--lime);
}

.page-products .pd-code__link:hover .pd-code__peek,
.page-products .pd-code__link:focus-visible .pd-code__peek {
  max-height: 4em;
  opacity: 1;
}

.page-products .pd-hero__media {
  margin-top: 26px;
}

/* ---------- 图片容器 ---------- */

.page-products .media {
  position: relative;
  margin: 0;
  border: var(--pd-edge);
  border-radius: var(--pd-r);
  overflow: hidden;
  background: linear-gradient(158deg, var(--ink-2) 0%, var(--ink) 100%);
}

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

.page-products .media__cap {
  padding: 10px 14px;
  border-top: var(--pd-edge);
  background: var(--ink-2);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
}

.page-products .pd-block__media {
  max-width: 520px;
}

/* ---------- 通用内容区块 ---------- */

.page-products .pd-block {
  padding: 60px 0 0;
}

.page-products .pd-block__grid {
  display: grid;
  gap: 24px;
}

.page-products .pd-block__title {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(24px, 5.4vw, 36px);
  line-height: 1.24;
  letter-spacing: -0.01em;
  margin: 8px 0 16px;
}

.page-products .pd-block__text p {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
  max-width: 34em;
}

.page-products .pd-block__text--wide {
  max-width: 720px;
  margin-bottom: 26px;
}

.page-products .pd-facts {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-products .pd-facts li {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 14px;
  border: 1px solid rgba(124, 255, 61, 0.28);
  border-radius: var(--r-pill);
  background: var(--lime-mist);
  font-size: 13.5px;
  color: var(--text);
}

.page-products .pd-facts .mono {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 19px;
  color: var(--lime);
}

/* ---------- 折叠字段 ---------- */

.page-products .pd-details {
  margin-top: 10px;
  border: var(--pd-edge);
  border-radius: var(--r-sm);
  background: var(--surface);
  overflow: hidden;
}

.page-products .pd-details__sum {
  padding: 13px 16px;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 15px;
  color: var(--text);
  cursor: pointer;
  list-style: none;
}

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

.page-products .pd-details__sum::after {
  content: "+";
  float: right;
  font-family: var(--font-mono);
  color: var(--lime);
}

.page-products .pd-details[open] .pd-details__sum::after {
  content: "–";
}

.page-products .pd-details__sum:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: -2px;
  background: var(--lime-mist);
}

.page-products .pd-details__body {
  padding: 0 16px 14px;
  border-top: var(--pd-edge);
}

.page-products .pd-details__body p {
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 宽幅图 ---------- */

.page-products .pd-wide img {
  max-height: 380px;
}

/* ---------- 编号体系 ---------- */

.page-products .pd-code-band {
  margin-top: 60px;
  padding: 0;
}

.page-products .pd-code-band__inner {
  padding: 32px 20px 30px;
  border: 1px solid rgba(124, 255, 61, 0.26);
  border-radius: var(--pd-r);
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(124, 255, 61, 0.12) 0%, transparent 58%),
    var(--ink-2);
}

.page-products .pd-code-band__intro p {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
  max-width: 34em;
}

.page-products .pd-anatomy {
  display: flex;
  gap: 6px;
  margin: 24px 0 14px;
}

.page-products .pd-anatomy__seg {
  display: grid;
  place-items: center;
  width: 50px;
  height: 62px;
  border: var(--pd-edge);
  border-radius: var(--r-xs);
  background: var(--surface);
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 26px;
  color: var(--text);
}

.page-products .pd-anatomy__seg--code {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--on-lime);
}

.page-products .pd-anatomy__notes {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 9px;
  font-size: 14px;
  color: var(--muted);
}

.page-products .pd-anatomy__notes li {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.page-products .pd-code-band__note {
  margin: 0;
  padding-top: 16px;
  border-top: var(--pd-edge);
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--muted);
  max-width: 40em;
}

/* ---------- 版本演进 ---------- */

.page-products .pd-versions {
  margin-top: 60px;
  padding: 34px 20px 32px;
  border-top: var(--pd-edge);
  border-bottom: var(--pd-edge);
  background: var(--ink-2);
}

.page-products .pd-scale {
  display: block;
  width: 100%;
  height: 24px;
  margin: 4px 0 20px;
}

.page-products .pd-scale__axis {
  stroke: var(--line);
  stroke-width: 1;
}

.page-products .pd-scale__tick {
  stroke: var(--lime);
  stroke-width: 1.5;
}

.page-products .pd-track {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-products .pd-track__item {
  position: relative;
  padding: 20px 18px 18px;
  border: var(--pd-edge);
  border-radius: var(--pd-r);
  background: var(--surface);
}

.page-products .pd-track__item::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 18px;
  right: 18px;
  height: 1px;
  background: linear-gradient(90deg, var(--lime), transparent 80%);
}

.page-products .pd-track__title {
  margin: 12px 0 8px;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.4;
  color: var(--text);
}

.page-products .pd-track__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-products .pd-versions__media {
  margin-top: 26px;
}

.page-products .pd-versions__media img {
  max-height: 320px;
}

.page-products .pd-versions__foot {
  margin: 22px 0 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--muted);
  max-width: 42em;
}

.page-products .pd-versions__foot a {
  color: var(--lime);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-products .pd-versions__foot a:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ---------- 上手路径 ---------- */

.page-products .pd-start {
  padding-top: 56px;
}

.page-products .pd-steps {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-products .pd-steps__item {
  padding: 20px 18px 18px;
  border-left: 2px solid var(--lime);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  background: var(--ink-2);
}

.page-products .pd-steps__n {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 22px;
  color: var(--lime);
}

.page-products .pd-steps__title {
  margin: 10px 0 8px;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.4;
  color: var(--text);
}

.page-products .pd-steps__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-products .pd-start__links {
  margin: 24px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 栅格与响应式 ---------- */

@media (min-width: 640px) {
  .page-products .pd-codes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }
}

@media (min-width: 900px) {
  .page-products .pd-hero {
    padding-top: 40px;
  }

  .page-products .pd-codes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }

  .page-products .pd-code__link {
    min-height: 152px;
  }

  .page-products .pd-block {
    padding-top: 76px;
  }

  .page-products .pd-block__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 46px;
    align-items: start;
  }

  .page-products .pd-block--flip .pd-block__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-products .pd-block--flip .pd-block__text {
    order: 2;
  }

  .page-products .pd-block--flip .pd-block__media {
    order: 1;
  }

  .page-products .pd-block__media {
    max-width: none;
  }

  .page-products .pd-code-band__inner {
    padding: 44px 40px 40px;
  }

  .page-products .pd-versions {
    padding: 52px 40px 48px;
  }

  .page-products .pd-track {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-products .pd-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .page-products .pd-start {
    padding-top: 72px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products .pd-code__link,
  .page-products .pd-code__peek {
    transition: none;
  }

  .page-products .pd-code__link:hover,
  .page-products .pd-code__link:focus-visible {
    transform: none;
  }
}