.page-products {
  display: block;
  padding: 20px 0 64px;
  background-image: repeating-linear-gradient(180deg, transparent 0 43px, rgba(27, 21, 18, 0.04) 43px 44px);
}

.page-products .pp-head {
  display: grid;
  gap: 14px;
  max-width: 66ch;
  padding: 10px 0 6px;
}

.page-products .pp-head h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(28px, 5.6vw, 46px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-products .pp-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 10px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  color: var(--grey);
}

.page-products .pp-hero {
  margin: 22px 0 40px;
}

.page-products .figure__frame {
  overflow: hidden;
  background: var(--ledger);
  border: var(--bd);
  box-shadow: var(--shadow-1);
}

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

.page-products .figure__cap {
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--grey);
}

.page-products .sec {
  margin: 0 0 46px;
}

.page-products .sec__head {
  display: grid;
  gap: 8px;
  max-width: 62ch;
  margin-bottom: 18px;
}

.page-products .sec__head h2,
.page-products .flow__body h2,
.page-products .splice__body h2,
.page-products .alt h2,
.page-products .trace h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(23px, 4vw, 33px);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-products .sec__note {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--grey);
}

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

/* ---------- 三步 ---------- */
.page-products .flow {
  display: grid;
  gap: 22px;
}

.page-products .flow__coin {
  border: var(--bd);
  background: var(--red);
  box-shadow: var(--shadow-1);
  padding: 20px;
  display: grid;
  justify-items: center;
  gap: 10px;
}

.page-products .flow__coin svg {
  width: 100%;
  max-width: 240px;
  height: auto;
}

.page-products .flow__cap {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--jade);
  text-align: center;
}

.page-products .flow__body {
  display: grid;
  gap: 12px;
}

.page-products .flow__steps {
  display: grid;
  gap: 14px;
  margin-top: 6px;
}

.page-products .step {
  display: flex;
  flex-direction: column;
  gap: 9px;
  padding: 16px;
  background: var(--jade);
  border: var(--bd);
  box-shadow: var(--shadow-1);
  transition: box-shadow 180ms var(--ease), transform 180ms var(--ease);
}

.page-products .step--gate {
  background: var(--ledger);
  border-color: var(--red);
  box-shadow: 6px 6px 0 var(--red);
}

.page-products .step h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 19px;
  line-height: 1.3;
  color: var(--ink);
}

.page-products .step p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--ink);
}

.page-products .step__go {
  margin-top: auto;
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  padding: 7px 10px;
  border: 2px solid var(--ink);
  background: var(--gold);
  color: var(--ink);
  cursor: pointer;
  transition: background 160ms var(--ease), color 160ms var(--ease);
}

.page-products .step__go:hover {
  background: var(--gold-deep);
  color: var(--jade);
}

.page-products .step__go:focus-visible,
.page-products .item__mark:focus-visible {
  outline: 3px solid var(--red-lit);
  outline-offset: 2px;
}

/* ---------- 横向卷轴清单 ---------- */
.page-products .scroller {
  display: flex;
  gap: 14px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding: 8px 6px 22px;
  margin: 0 -6px;
  -webkit-overflow-scrolling: touch;
  scrollbar-color: var(--gold) transparent;
}

.page-products .scroller::-webkit-scrollbar {
  height: 10px;
}

.page-products .scroller::-webkit-scrollbar-thumb {
  background: var(--gold);
  border: 2px solid var(--ink);
}

.page-products .scroller > * {
  flex: 0 0 clamp(238px, 74vw, 292px);
  scroll-snap-align: start;
}

.page-products .scroller .item:nth-child(even) {
  margin-top: 18px;
}

.page-products .item {
  display: flex;
  flex-direction: column;
  gap: 9px;
  padding: 16px 16px 14px;
  background: var(--jade);
  border: var(--bd);
  box-shadow: var(--shadow-1);
  scroll-margin-left: 14px;
  transition: box-shadow 180ms var(--ease), transform 180ms var(--ease);
}

.page-products .item--ledger {
  background: var(--ledger);
}

.page-products .item:hover {
  box-shadow: var(--shadow-2);
  transform: translate(2px, -2px);
}

.page-products .item:target {
  box-shadow: var(--shadow-2);
  outline: 3px solid var(--gold);
  outline-offset: 0;
}

.page-products .item__t {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 19px;
  line-height: 1.28;
  color: var(--ink);
}

.page-products .item__d {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--ink);
}

.page-products .item__ok {
  display: flex;
  align-items: baseline;
  gap: 7px;
  margin: 0;
  padding: 7px 9px;
  font-size: 13px;
  line-height: 1.62;
  color: var(--ink-green);
  background: rgba(47, 125, 91, 0.12);
  border-left: 3px solid var(--ok);
}

.page-products .item__mark {
  margin-top: auto;
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  padding: 6px 10px;
  border: 2px solid var(--ink);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  transition: background 160ms var(--ease), color 160ms var(--ease);
}

.page-products .item__mark[data-on="on"] {
  background: var(--ok);
  color: var(--jade);
}

/* ---------- 切换入口与分区 ---------- */
.page-products .splice {
  display: grid;
  gap: 22px;
}

.page-products .splice__side {
  padding: 20px;
  background: var(--red);
  color: var(--jade);
  border: var(--bd);
  box-shadow: var(--shadow-1);
}

.page-products .splice__kicker {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gold);
}

.page-products .splice__flow {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-products .splice__flow li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  line-height: 1.5;
}

.page-products .splice__flow span {
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 3px 6px;
  background: var(--gold);
  color: var(--ink);
  border: 2px solid var(--jade);
}

.page-products .splice__lit {
  margin: 0;
  padding-top: 14px;
  border-top: 2px dashed rgba(248, 242, 228, 0.45);
  font-size: 14px;
  line-height: 1.7;
  color: var(--jade);
}

.page-products .splice__body {
  display: grid;
  gap: 14px;
}

.page-products .splice__body > p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--ink);
  max-width: 66ch;
}

.page-products .sw {
  list-style: none;
  margin: 4px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
  counter-reset: sw;
}

.page-products .sw li {
  position: relative;
  padding-left: 48px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--ink);
}

.page-products .sw li::before {
  counter-increment: sw;
  content: counter(sw, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 3px 6px;
  background: var(--gold);
  color: var(--ink);
  border: 2px solid var(--ink);
}

.page-products .parts {
  list-style: none;
  margin: 6px 0 8px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-products .part {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 11px 12px;
  background: var(--jade);
  border: 2px solid var(--ink);
  font-size: 14.5px;
  line-height: 1.68;
  color: var(--ink);
}

.page-products .part__n {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gold-deep);
}

.page-products .part strong {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 15.5px;
}

.page-products .splice__tail {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--grey);
}

.page-products .splice__tail a {
  color: var(--red);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 替代路径 ---------- */
.page-products .alt {
  padding: 24px 20px;
  background: var(--ledger);
  border: var(--bd);
  box-shadow: var(--shadow-1);
}

.page-products .alt__note {
  margin: 8px 0 18px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink);
  max-width: 64ch;
}

.page-products .fold {
  background: var(--jade);
  border: 2px solid var(--ink);
}

.page-products .fold + .fold {
  margin-top: 12px;
}

.page-products .fold__sum {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 16.5px;
}

.page-products .fold__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--ink);
}

/* ---------- 更新与回溯 ---------- */
.page-products .trace {
  display: grid;
  gap: 22px;
  padding: 26px 20px;
  background: var(--ink-green);
  color: var(--jade);
  border: var(--bd);
  box-shadow: var(--shadow-1);
}

.page-products .trace__body {
  display: grid;
  gap: 12px;
}

.page-products .trace h2 {
  color: var(--jade);
}

.page-products .trace p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(248, 242, 228, 0.9);
  max-width: 62ch;
}

.page-products .eyebrow--light {
  color: var(--gold);
}

.page-products .trace__links {
  list-style: none;
  margin: 6px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-products .trace__links a {
  display: inline-block;
  padding: 7px 12px;
  font-size: 14px;
  text-decoration: none;
  color: var(--ink);
  background: var(--gold);
  border: 2px solid var(--ink);
  transition: background 160ms var(--ease);
}

.page-products .trace__links a:hover {
  background: var(--jade);
}

.page-products .trace__fig .figure__cap {
  color: rgba(248, 242, 228, 0.72);
}

/* ---------- 媒体查询 ---------- */
@media (min-width: 640px) {
  .page-products .flow__steps {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  }

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

  .page-products .scroller > * {
    flex: 0 0 clamp(250px, 42vw, 300px);
  }
}

@media (min-width: 860px) {
  .page-products .flow {
    grid-template-columns: 280px minmax(0, 1fr);
    gap: 30px;
    align-items: start;
  }
}

@media (min-width: 920px) {
  .page-products .splice {
    grid-template-columns: 288px minmax(0, 1fr);
    gap: 34px;
    align-items: start;
  }

  .page-products .splice__side {
    position: sticky;
    top: 26px;
  }

  .page-products .trace {
    grid-template-columns: minmax(0, 1fr) 300px;
    align-items: center;
    padding: 34px 30px;
  }

  .page-products .alt {
    padding: 30px 28px;
  }

  .page-products .sec__fig {
    margin-bottom: 26px;
  }
}

@media (min-width: 1100px) {
  .page-products .pp-hero {
    margin-bottom: 48px;
  }

  .page-products .scroller > * {
    flex: 0 0 300px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products .item,
  .page-products .step,
  .page-products .item__mark,
  .page-products .step__go,
  .page-products .trace__links a {
    transition: none;
  }

  .page-products .item:hover {
    transform: none;
  }
}