.page-products {
  --pd-gap: clamp(22px, 3.6vw, 52px);
  --pd-pad: clamp(56px, 8vw, 112px);
  position: relative;
  color: var(--graphite);
  font-family: var(--font-body);
  line-height: 1.75;
  background-color: var(--cream);
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 24px 24px;
}

.page-products .pd-block {
  padding-block: var(--pd-pad);
  border-bottom: 2px solid var(--ink-navy);
}

.page-products .pd-block:last-of-type {
  border-bottom: 0;
}

.page-products .pd-head {
  max-width: 44rem;
  margin-bottom: clamp(28px, 4vw, 52px);
}

.page-products .pd-figure {
  margin: clamp(28px, 4vw, 48px) 0 0;
}

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

.page-products .pd-hero {
  padding-block: clamp(20px, 3vw, 36px) clamp(48px, 7vw, 92px);
  border-bottom: 2px solid var(--ink-navy);
}

.page-products .pd-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--pd-gap);
  align-items: start;
  margin-top: clamp(20px, 3vw, 36px);
}

.page-products .pd-hero__copy h1 {
  margin-bottom: 0.5em;
}

.page-products .pd-hero__facts {
  list-style: none;
  margin: clamp(24px, 3.4vw, 38px) 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 18px;
}

.page-products .pd-hero__facts li {
  border-left: 3px solid var(--warm-gold);
  padding-left: 12px;
}

.page-products .pd-hero__facts b {
  display: block;
  font-size: clamp(1.35rem, 3vw, 1.95rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: 0.01em;
  color: var(--ink-navy);
  font-variant-numeric: tabular-nums;
}

.page-products .pd-hero__facts span {
  display: block;
  margin-top: 6px;
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--graphite);
}

.page-products .pd-hero__visual {
  margin: 0;
}

/* 三条服务线 */
.page-products .pd-lines__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(18px, 2.4vw, 26px);
}

.page-products .pd-line {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  padding: clamp(20px, 3vw, 34px);
  background-color: var(--cream);
  border: 2px solid var(--ink-navy);
  box-shadow: var(--shadow-hard);
}

.page-products .pd-line:nth-child(2) {
  background-color: var(--paper);
}

.page-products .pd-line__no {
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 4.4vw, 2.6rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: 0.06em;
  color: var(--gold-deep);
  font-variant-numeric: tabular-nums;
}

.page-products .pd-line__body h3 {
  margin: 0 0 0.5em;
  font-size: clamp(1.15rem, 2.4vw, 1.5rem);
  font-weight: 700;
  line-height: 1.35;
  color: var(--ink-navy);
}

.page-products .pd-line__body p {
  margin: 0 0 0.85em;
}

.page-products .pd-line__who {
  margin: 0;
  padding-top: 0.7em;
  border-top: 1px dashed var(--hairline);
  font-size: 0.9rem;
  color: var(--gold-deep);
  font-weight: 700;
}

/* 六栏对照 */
.page-products .pd-sixcol {
  background-color: var(--paper);
}

.page-products .pd-sixcol__track {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border-top: 2px solid var(--ink-navy);
  border-bottom: 2px solid var(--ink-navy);
  background-color: var(--cream);
}

.page-products .pd-col {
  border-bottom: 1px solid var(--hairline);
  outline: none;
  transition: background-color 180ms var(--ease);
}

.page-products .pd-col:last-child {
  border-bottom: 0;
}

.page-products .pd-col__head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 14px 16px;
  background-color: var(--ink-navy);
  color: var(--cream);
}

.page-products .pd-col:nth-child(even) .pd-col__head {
  background-color: var(--navy-soft);
}

.page-products .pd-col__no {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--warm-gold);
  font-variant-numeric: tabular-nums;
}

.page-products .pd-col__title {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--cream);
}

.page-products .pd-col__body {
  padding: 18px 16px 22px;
  background-color: var(--cream);
  transition: background-color 180ms var(--ease);
}

.page-products .pd-col:nth-child(even) .pd-col__body {
  background-color: var(--paper);
}

.page-products .pd-col__body p {
  margin: 0 0 0.8em;
  font-size: 0.94rem;
}

.page-products .pd-col__who {
  margin: 0;
  padding-top: 0.7em;
  border-top: 1px solid var(--hairline);
  font-size: 0.82rem;
  color: var(--gold-deep);
  font-weight: 700;
}

.page-products .pd-col:hover .pd-col__body,
.page-products .pd-col:focus .pd-col__body,
.page-products .pd-col:focus-within .pd-col__body {
  background-color: var(--amber-light);
}

.page-products .pd-readorder {
  margin-top: clamp(28px, 4vw, 44px);
  padding: clamp(20px, 3vw, 30px);
  background-color: var(--amber-light);
  border: 2px solid var(--ink-navy);
  box-shadow: var(--shadow-mid);
}

.page-products .pd-readorder__label {
  margin: 0 0 14px;
  font-size: 0.8rem;
  letter-spacing: 0.28em;
  font-weight: 700;
  color: var(--gold-deep);
}

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

.page-products .pd-readorder__list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink-navy);
}

.page-products .pd-readorder__list .num {
  font-family: var(--font-mono);
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--vermilion);
  font-variant-numeric: tabular-nums;
}

/* 两个版本 */
.page-products .pd-versions__pair {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 2.6vw, 28px);
}

.page-products .pd-vcard {
  padding: clamp(22px, 3vw, 34px);
  border: 2px solid var(--ink-navy);
  background-color: var(--cream);
  box-shadow: var(--shadow-hard);
}

.page-products .pd-vcard--old {
  border-top: 8px solid var(--navy-soft);
}

.page-products .pd-vcard--new {
  border-top: 8px solid var(--vermilion);
}

.page-products .pd-vcard h3 {
  margin: 14px 0 0.6em;
  font-size: clamp(1.15rem, 2.4vw, 1.45rem);
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink-navy);
}

.page-products .pd-vcard p {
  margin: 0 0 0.9em;
}

.page-products .pd-vcard__when {
  margin: 0;
  padding-top: 0.75em;
  border-top: 1px dashed var(--hairline);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--gold-deep);
}

.page-products .pd-rule {
  margin-top: clamp(22px, 3vw, 34px);
  padding: clamp(20px, 3vw, 30px);
  background-color: var(--ink-navy);
  color: var(--cream);
  border-left: 8px solid var(--warm-gold);
}

.page-products .pd-rule__label {
  margin: 0 0 10px;
  font-size: 0.78rem;
  letter-spacing: 0.3em;
  font-weight: 700;
  color: var(--warm-gold);
}

.page-products .pd-rule p {
  margin: 0 0 18px;
  color: var(--cream);
}

/* 四类设备 */
.page-products .pd-devices {
  background-color: var(--paper);
}

.page-products .pd-devices__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 2.2vw, 24px);
}

.page-products .pd-device {
  padding: clamp(20px, 2.8vw, 30px);
  background-color: var(--cream);
  border: 2px solid var(--ink-navy);
}

.page-products .pd-device:nth-child(2) {
  background-color: var(--amber-light);
}

.page-products .pd-device__badge {
  display: inline-block;
  margin-bottom: 12px;
  padding: 4px 10px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--cream);
  background-color: var(--ink-navy);
}

.page-products .pd-device h3 {
  margin: 0 0 0.5em;
  font-size: 1.08rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink-navy);
}

.page-products .pd-device p {
  margin: 0;
  font-size: 0.94rem;
}

/* 四步流程 */
.page-products .pd-steps__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 2.4vw, 22px);
}

.page-products .pd-step {
  position: relative;
  padding: clamp(22px, 3vw, 32px);
  background-color: var(--amber-light);
  border: 2px solid var(--ink-navy);
  box-shadow: var(--shadow-mid);
}

.page-products .pd-step:nth-child(2) {
  background-color: #F0D9A6;
}

.page-products .pd-step:nth-child(4) {
  background-color: #EFD2B4;
}

.page-products .pd-step__no {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(2rem, 4.6vw, 2.7rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: 0.06em;
  color: var(--gold-deep);
  font-variant-numeric: tabular-nums;
}

.page-products .pd-step h3 {
  margin: 14px 0 0.45em;
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--ink-navy);
}

.page-products .pd-step p {
  margin: 0;
  font-size: 0.92rem;
}

/* 版本演进 */
.page-products .pd-ladder-block {
  background-color: var(--paper);
}

.page-products .pd-ladder {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  counter-reset: pd-rung;
}

.page-products .pd-rung {
  display: grid;
  grid-template-columns: minmax(64px, auto) minmax(0, 1fr);
  align-items: center;
  gap: clamp(14px, 2.4vw, 26px);
  padding: 16px clamp(14px, 2.4vw, 24px);
  background-color: var(--cream);
  border: 2px solid var(--ink-navy);
  border-left-width: 8px;
  border-left-color: var(--warm-gold);
}

.page-products .pd-rung__ver {
  font-family: var(--font-mono);
  font-size: clamp(1rem, 2.2vw, 1.25rem);
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--ink-navy);
  font-variant-numeric: tabular-nums;
}

.page-products .pd-rung p {
  margin: 0;
  font-size: 0.94rem;
}

.page-products .pd-rung--current {
  border-left-color: var(--vermilion);
  background-color: var(--amber-light);
  box-shadow: var(--shadow-mid);
}

.page-products .pd-rung--current .pd-rung__ver {
  font-size: clamp(1.35rem, 3.4vw, 1.95rem);
  color: var(--vermilion);
}

.page-products .pd-rung--current p {
  font-weight: 700;
  color: var(--ink-navy);
}

/* 拿不准的时候 */
.page-products .pd-choose__list {
  display: grid;
  gap: 14px;
}

.page-products .pd-choose__item {
  background-color: var(--cream);
  border: 2px solid var(--ink-navy);
  box-shadow: var(--shadow-mid);
}

.page-products .pd-choose__item summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  padding: clamp(16px, 2.4vw, 22px) clamp(16px, 2.6vw, 26px);
  cursor: pointer;
  list-style: none;
  font-weight: 700;
}

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

.page-products .pd-choose__item summary::after {
  content: "＋";
  margin-left: auto;
  font-size: 1.1rem;
  color: var(--gold-deep);
}

.page-products .pd-choose__item[open] summary::after {
  content: "－";
  color: var(--vermilion);
}

.page-products .pd-choose__idx {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  color: var(--cream);
  background-color: var(--ink-navy);
  padding: 3px 9px;
}

.page-products .pd-choose__q {
  font-size: clamp(1rem, 2.2vw, 1.15rem);
  color: var(--ink-navy);
}

.page-products .pd-choose__item p {
  margin: 0;
  padding: 0 clamp(16px, 2.6vw, 26px) clamp(18px, 2.6vw, 24px);
  font-size: 0.94rem;
  border-top: 1px dashed var(--hairline);
  padding-top: 16px;
}

.page-products .pd-choose__foot {
  margin-top: clamp(24px, 3.4vw, 38px);
  padding: clamp(22px, 3vw, 32px);
  background-color: var(--ink-navy);
  color: var(--cream);
  border: 2px solid var(--navy-deep);
  box-shadow: var(--shadow-hard);
}

.page-products .pd-choose__foot p {
  margin: 0 0 18px;
  color: var(--cream);
}

.page-products .pd-choose__foot .btn--ghost {
  color: var(--cream);
  border-color: var(--cream);
}

/* 延伸入口 */
.page-products .pd-more__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(14px, 2.2vw, 20px);
}

.page-products .pd-more__card {
  display: block;
  padding: clamp(20px, 2.8vw, 28px);
  background-color: var(--paper);
  border: 2px solid var(--ink-navy);
  color: var(--graphite);
  text-decoration: none;
  transition: transform 180ms var(--ease), background-color 180ms var(--ease);
}

.page-products .pd-more__card:hover,
.page-products .pd-more__card:focus-visible {
  background-color: var(--amber-light);
  transform: translate(-2px, -2px);
}

.page-products .pd-more__k {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 0.92rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--gold-deep);
}

.page-products .pd-more__card p {
  margin: 0;
  font-size: 0.94rem;
}

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

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

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

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

@media (min-width: 820px) {
  .page-products .pd-line {
    grid-template-columns: 110px minmax(0, 1fr);
    align-items: start;
  }

  .page-products .pd-line:nth-child(even) {
    margin-inline-start: clamp(0px, 2vw, 28px);
  }

  .page-products .pd-sixcol__track {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-products .pd-col {
    border-bottom: 0;
    border-right: 1px solid var(--hairline);
  }

  .page-products .pd-col:last-child {
    border-right: 0;
  }

  .page-products .pd-col__head {
    flex-direction: column;
    gap: 6px;
    min-height: 118px;
    align-items: flex-start;
  }

  .page-products .pd-col__body {
    min-height: 210px;
  }

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

  .page-products .pd-step:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 42%;
    right: -14px;
    width: 14px;
    height: 2px;
    background-color: var(--gold-deep);
    z-index: 2;
  }

  .page-products .pd-step:nth-child(3)::after {
    background-color: var(--vermilion);
  }

  .page-products .pd-ladder {
    gap: 12px;
  }

  .page-products .pd-rung:nth-child(1) { margin-inline-end: 34%; }
  .page-products .pd-rung:nth-child(2) { margin-inline-end: 28%; }
  .page-products .pd-rung:nth-child(3) { margin-inline-end: 22%; }
  .page-products .pd-rung:nth-child(4) { margin-inline-end: 14%; }
  .page-products .pd-rung:nth-child(5) { margin-inline-end: 7%; }
  .page-products .pd-rung:nth-child(6) { margin-inline-end: 0; }
}

@media (min-width: 960px) {
  .page-products .pd-hero__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-products .pd-hero__facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px 24px;
  }

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

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

@media (prefers-reduced-motion: reduce) {
  .page-products .pd-more__card {
    transition: background-color 180ms var(--ease);
    transform: none;
  }

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