.page-products {
  --pd-line: var(--grid);
  --pd-pad: calc(var(--step) * 3);
  background:
    linear-gradient(0deg, rgba(42, 59, 82, .18) 1px, transparent 1px) 0 0 / 64px 64px,
    linear-gradient(90deg, rgba(42, 59, 82, .18) 1px, transparent 1px) 0 0 / 64px 64px,
    var(--ink-950);
  color: var(--on-dark);
  font-family: var(--f-sans);
  padding-bottom: calc(var(--step) * 10);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-products .pd-hero {
  position: relative;
  padding: calc(var(--step) * 6) 0 calc(var(--step) * 6);
  border-bottom: 1px solid var(--pd-line);
}

.page-products .pd-hero__grid {
  display: grid;
  gap: calc(var(--step) * 4);
}

.page-products .pd-hero .eyebrow {
  display: inline-block;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--gold);
  border: 1px solid rgba(201, 162, 39, .42);
  padding: 5px 10px;
  margin: 0 0 calc(var(--step) * 3);
}

.page-products .pd-hero h1 {
  margin: 0 0 calc(var(--step) * 3);
  font-size: clamp(34px, 6.6vw, 72px);
  line-height: 1.07;
  font-weight: 900;
  letter-spacing: -.02em;
  color: #fff;
  max-width: 20ch;
}

.page-products .pd-hero .lede {
  max-width: 44ch;
  margin: 0 0 calc(var(--step) * 4);
  font-size: 16px;
  line-height: 1.8;
  color: var(--on-dark-soft);
}

.page-products .pd-hero__acts {
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--step) * 1.5);
}

.page-products .pd-hero__side {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--pd-line);
  border: 1px solid var(--pd-line);
  align-self: start;
}

.page-products .pd-hero__cell {
  background: rgba(8, 21, 39, .82);
  padding: calc(var(--step) * 2) calc(var(--step) * 1.5);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-products .pd-hero__cell--hot {
  background: rgba(192, 57, 43, .16);
  box-shadow: inset 3px 0 0 var(--red);
}

.page-products .pd-hero__k {
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--on-dark-soft);
}

.page-products .pd-hero__v {
  font-family: var(--f-mono);
  font-size: 24px;
  font-weight: 700;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
}

/* ---------- 章节索引 ---------- */
.page-products .pd-toc {
  display: flex;
  flex-wrap: wrap;
  gap: 1px;
  background: var(--pd-line);
  border: 1px solid var(--pd-line);
  border-top: 0;
}

.page-products .pd-toc__item {
  flex: 1 1 140px;
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 12px 14px;
  background: rgba(5, 13, 24, .92);
  color: var(--on-dark-soft);
  font-size: 13px;
  text-decoration: none;
  transition: background .2s var(--ease), color .2s var(--ease);
}

.page-products .pd-toc__item .mono {
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--gold);
}

.page-products .pd-toc__item:hover,
.page-products .pd-toc__item.is-active {
  background: rgba(201, 162, 39, .14);
  color: #fff;
}

/* ---------- 章节通用 ---------- */
.page-products .pd-sec {
  padding: calc(var(--step) * 8) 0 0;
}

.page-products .pd-head {
  margin-bottom: calc(var(--step) * 4);
  border-top: 1px solid var(--pd-line);
  padding-top: calc(var(--step) * 2);
}

.page-products .pd-head .eyebrow {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--gold);
}

.page-products .pd-head h2 {
  margin: calc(var(--step) * 1) 0 calc(var(--step) * 1.5);
  font-size: clamp(24px, 3.6vw, 38px);
  line-height: 1.16;
  font-weight: 900;
  letter-spacing: -.015em;
  color: #fff;
  max-width: 24ch;
}

.page-products .pd-head__lead {
  margin: 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--on-dark-soft);
}

.page-products .pd-sub {
  margin: 0 0 calc(var(--step) * 2);
  font-size: 19px;
  font-weight: 800;
  color: #fff;
  letter-spacing: -.01em;
}

.page-products .pd-note {
  margin: calc(var(--step) * 2) 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--on-dark-soft);
}

.page-products .pd-note a,
.page-products .pd-close__text a {
  color: var(--gold-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(232, 217, 168, .4);
}

.page-products .pd-note a:hover,
.page-products .pd-close__text a:hover {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

/* ---------- 规格层级卡 ---------- */
.page-products .pd-spec-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--pd-line);
  border: 1px solid var(--pd-line);
}

.page-products .pd-spec {
  background: rgba(5, 13, 24, .94);
  padding: calc(var(--step) * 3) calc(var(--step) * 2.5);
  position: relative;
  display: flex;
  flex-direction: column;
  gap: calc(var(--step) * 1.5);
}

.page-products .pd-spec--accent {
  background: linear-gradient(180deg, rgba(18, 42, 69, .9), rgba(8, 21, 39, .96));
  box-shadow: inset 0 3px 0 var(--gold);
}

.page-products .pd-spec__no {
  display: inline-block;
  align-self: flex-start;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--gold);
  border: 1px solid rgba(201, 162, 39, .5);
  padding: 3px 7px;
}

.page-products .pd-spec__title {
  margin: 0;
  font-size: 21px;
  font-weight: 900;
  color: #fff;
  letter-spacing: -.01em;
}

.page-products .pd-spec__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--on-dark-soft);
}

.page-products .pd-spec__list {
  margin: auto 0 0;
  padding: calc(var(--step) * 1.5) 0 0;
  list-style: none;
  border-top: 1px dashed var(--pd-line);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-products .pd-spec__list li {
  font-size: 13px;
  color: var(--on-dark);
  padding-left: 14px;
  position: relative;
}

.page-products .pd-spec__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 1px;
  background: var(--gold);
}

/* ---------- 图片容器 ---------- */
.page-products .pd-figure {
  margin: calc(var(--step) * 4) 0 0;
  border: 1px solid var(--pd-line);
  background: rgba(8, 21, 39, .7);
  padding: calc(var(--step) * 1.5);
}

.page-products .pd-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  background: var(--ink-900);
}

.page-products .pd-figure .media__cap {
  margin-top: calc(var(--step) * 1.5);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--on-dark-soft);
}

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

/* ---------- 纸张卡片与表格 ---------- */
.page-products .pd-paper {
  background: var(--paper);
  color: var(--ink-text);
  border: 1px solid var(--paper-line);
  box-shadow: var(--shadow-paper);
  padding: calc(var(--step) * 2.5);
}

.page-products .pd-tbl__cap {
  text-align: left;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--ink-text-soft);
  padding-bottom: calc(var(--step) * 1.5);
}

.page-products .pd-tbl {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
}

.page-products .pd-tbl th,
.page-products .pd-tbl td {
  text-align: left;
  vertical-align: top;
  padding: 12px 14px;
  line-height: 1.65;
}

.page-products .pd-tbl thead th {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--ink-text-soft);
  border-bottom: 1px solid var(--gold);
  white-space: nowrap;
}

.page-products .pd-tbl tbody th {
  font-size: 14px;
  font-weight: 800;
  color: var(--ink-text);
  white-space: nowrap;
  border-bottom: 1px solid var(--paper-line);
}

.page-products .pd-tbl tbody td {
  font-size: 14px;
  color: var(--ink-text-soft);
  border-bottom: 1px solid var(--paper-line);
}

.page-products .pd-tbl tbody tr:nth-child(even) {
  background: rgba(213, 204, 182, .34);
}

.page-products .pd-tbl tbody tr:hover {
  background: rgba(201, 162, 39, .16);
}

.page-products .pd-tbl tbody tr:last-child th,
.page-products .pd-tbl tbody tr:last-child td {
  border-bottom: 0;
}

.page-products .pd-tbl__foot {
  margin: calc(var(--step) * 2) 0 0;
  padding-top: calc(var(--step) * 1.5);
  border-top: 1px dashed var(--paper-line);
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-text-soft);
}

/* ---------- 双栏 ---------- */
.page-products .pd-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: calc(var(--step) * 3);
  margin-top: calc(var(--step) * 4);
  align-items: start;
}

.page-products .pd-numlist {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--pd-line);
}

.page-products .pd-numlist li {
  display: flex;
  gap: calc(var(--step) * 1.5);
  padding: 14px 0;
  border-bottom: 1px solid var(--pd-line);
  font-size: 14px;
  line-height: 1.75;
  color: var(--on-dark-soft);
}

.page-products .pd-numlist .mono {
  color: var(--gold);
  font-size: 12px;
  letter-spacing: .1em;
  padding-top: 3px;
}

/* ---------- 设备场景 ---------- */
.page-products .pd-scenes {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--pd-line);
  border: 1px solid var(--pd-line);
}

.page-products .pd-scene {
  background: rgba(5, 13, 24, .94);
  padding: calc(var(--step) * 2);
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "no title"
    "no text";
  column-gap: calc(var(--step) * 1.5);
  row-gap: 4px;
  align-items: baseline;
  transition: background .2s var(--ease);
}

.page-products .pd-scene:hover {
  background: rgba(18, 42, 69, .9);
}

.page-products .pd-scene__no {
  grid-area: no;
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--cool);
  border-left: 2px solid var(--cool);
  padding-left: 6px;
}

.page-products .pd-scene h3 {
  grid-area: title;
  margin: 0;
  font-size: 15px;
  font-weight: 800;
  color: #fff;
}

.page-products .pd-scene p {
  grid-area: text;
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--on-dark-soft);
}

.page-products .pd-diagram {
  margin-top: calc(var(--step) * 3);
  border: 1px solid var(--pd-line);
  background: rgba(8, 21, 39, .8);
  padding: calc(var(--step) * 2);
}

.page-products .pd-diagram__svg {
  display: block;
  width: 100%;
  height: auto;
}

/* ---------- 起订档位 ---------- */
.page-products .pd-tiers {
  display: grid;
  grid-template-columns: 1fr;
  gap: calc(var(--step) * 2);
}

.page-products .pd-tier {
  position: relative;
  border: 1px solid var(--pd-line);
  background: rgba(8, 21, 39, .86);
  padding: calc(var(--step) * 3) calc(var(--step) * 2.5) calc(var(--step) * 2.5);
  display: flex;
  flex-direction: column;
  gap: calc(var(--step) * 1.25);
}

.page-products .pd-tier::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--cool);
}

.page-products .pd-tier--mid::before {
  background: var(--gold);
}

.page-products .pd-tier--deep::before {
  background: var(--hot);
}

.page-products .pd-tier--mid {
  background: rgba(18, 42, 69, .8);
}

.page-products .pd-tier--deep {
  background: linear-gradient(180deg, rgba(224, 123, 57, .12), rgba(8, 21, 39, .9));
}

.page-products .pd-tier__tag {
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--on-dark-soft);
}

.page-products .pd-tier__num {
  font-size: 40px;
  font-weight: 700;
  line-height: 1;
  color: var(--gold);
  letter-spacing: -.02em;
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.page-products .pd-tier__num span {
  font-size: 14px;
  font-weight: 400;
  color: var(--on-dark-soft);
  letter-spacing: 0;
}

.page-products .pd-tier__name {
  margin: 0;
  font-size: 18px;
  font-weight: 800;
  color: #fff;
}

.page-products .pd-tier__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--on-dark-soft);
}

.page-products .pd-tier__meta {
  margin: auto 0 0;
  padding-top: calc(var(--step) * 1.5);
  border-top: 1px dashed var(--pd-line);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-products .pd-tier__meta > div {
  display: flex;
  justify-content: space-between;
  gap: var(--step);
  font-size: 13px;
}

.page-products .pd-tier__meta dt {
  color: var(--on-dark-soft);
  flex: 0 0 auto;
}

.page-products .pd-tier__meta dd {
  margin: 0;
  color: var(--on-dark);
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.page-products .pd-callout {
  margin-top: calc(var(--step) * 3);
  border-left: 3px solid var(--red);
  background: rgba(192, 57, 43, .1);
  padding: calc(var(--step) * 2) calc(var(--step) * 2.5);
}

.page-products .pd-callout p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--on-dark);
}

.page-products .pd-callout strong {
  color: #fff;
}

/* ---------- 自助对照 ---------- */
.page-products .pd-split--rev .pd-figure--tight {
  order: 2;
}

.page-products .pd-feature {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: calc(var(--step) * 1.5);
}

.page-products .pd-feature li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: calc(var(--step) * 1.5);
  padding: calc(var(--step) * 1.5) 0;
  border-bottom: 1px solid var(--pd-line);
}

.page-products .pd-feature__k {
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--gold);
  border: 1px solid rgba(201, 162, 39, .45);
  padding: 3px 6px;
  align-self: start;
  white-space: nowrap;
}

.page-products .pd-feature p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--on-dark-soft);
}

.page-products .pd-qa-list {
  margin-top: calc(var(--step) * 4);
  border: 1px solid var(--pd-line);
}

.page-products .pd-qa {
  background: rgba(8, 21, 39, .78);
}

.page-products .pd-qa + .pd-qa {
  border-top: 1px solid var(--pd-line);
}

.page-products .pd-qa > summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: baseline;
  gap: var(--step);
  padding: calc(var(--step) * 2);
  font-size: 15px;
  font-weight: 700;
  color: var(--on-dark);
  transition: background .2s var(--ease);
}

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

.page-products .pd-qa > summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--f-mono);
  font-size: 18px;
  color: var(--gold);
  line-height: 1;
}

.page-products .pd-qa[open] > summary {
  background: rgba(201, 162, 39, .1);
  color: #fff;
}

.page-products .pd-qa[open] > summary::after {
  content: "−";
}

.page-products .pd-qa__body {
  padding: 0 calc(var(--step) * 2) calc(var(--step) * 2);
  font-size: 14px;
  line-height: 1.8;
  color: var(--on-dark-soft);
}

.page-products .pd-qa__body p {
  margin: 0;
}

/* ---------- 交付流程 ---------- */
.page-products .pd-flow {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--pd-line);
  border: 1px solid var(--pd-line);
}

.page-products .pd-flow__step {
  background: rgba(5, 13, 24, .94);
  padding: calc(var(--step) * 2.5) calc(var(--step) * 2);
  display: flex;
  flex-direction: column;
  gap: calc(var(--step) * 1.25);
  position: relative;
}

.page-products .pd-flow__num {
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--gold);
}

.page-products .pd-flow__step h3 {
  margin: 0;
  font-size: 17px;
  font-weight: 800;
  color: #fff;
}

.page-products .pd-flow__step p {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--on-dark-soft);
}

.page-products .pd-flow__out {
  margin-top: auto;
  padding-top: calc(var(--step) * 1.5);
  border-top: 1px dashed var(--pd-line);
  font-family: var(--f-mono);
  font-size: 12px;
  color: var(--gold-soft);
  letter-spacing: .02em;
}

.page-products .pd-close {
  margin-top: calc(var(--step) * 4);
  padding: calc(var(--step) * 3);
  border: 1px solid var(--pd-line);
  background: linear-gradient(135deg, rgba(18, 42, 69, .9), rgba(5, 13, 24, .95));
  display: flex;
  flex-direction: column;
  gap: calc(var(--step) * 2.5);
  align-items: flex-start;
}

.page-products .pd-close__text {
  margin: 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--on-dark-soft);
}

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

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

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

@media (min-width: 900px) {
  .page-products .pd-hero {
    padding: calc(var(--step) * 9) 0 calc(var(--step) * 8);
  }

  .page-products .pd-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: calc(var(--step) * 6);
    align-items: start;
  }

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

  .page-products .pd-split {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: calc(var(--step) * 5);
  }

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

  .page-products .pd-split--rev .pd-figure--tight {
    order: 0;
  }

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

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

  .page-products .pd-flow {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-products .pd-close {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

@media (min-width: 1080px) {
  .page-products .pd-sec {
    padding-top: calc(var(--step) * 11);
  }

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

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

  .page-products .pd-hero h1 {
    max-width: 18ch;
  }
}