.page-products {
  --pp-idx-w: 216px;
  background: var(--ink-abyss);
  color: var(--mist-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  min-height: 100vh;
  padding-bottom: clamp(3rem, 7vw, 6rem);
}

/* ---------- 首屏 ---------- */

.page-products__hero {
  position: relative;
  padding: clamp(2rem, 5vw, 4.25rem) var(--gutter) clamp(1.75rem, 3.5vw, 3rem);
  background:
    radial-gradient(120% 95% at 10% -5%, rgba(53, 240, 208, 0.10), transparent 58%),
    radial-gradient(90% 70% at 95% 0%, rgba(255, 179, 71, 0.06), transparent 62%),
    var(--ink-abyss);
  border-bottom: 1px solid var(--moss-line);
}

.page-products__hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(30, 58, 51, 0.55) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(30, 58, 51, 0.4) 1px, transparent 1px);
  background-size: 88px 88px;
  opacity: 0.5;
  -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.85), transparent 88%);
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.85), transparent 88%);
}

.page-products__hero > * {
  position: relative;
  z-index: 1;
}

.page-products .crumbs {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--mist-dim);
  margin-bottom: clamp(1.25rem, 3vw, 2.25rem);
}

.page-products .crumbs a {
  color: var(--mist-dim);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

.page-products .crumbs a:hover,
.page-products .crumbs a:focus-visible {
  color: var(--fluoro-cyan);
}

.page-products .crumbs__sep {
  margin: 0 0.5em;
  color: var(--graphite);
}

.page-products__kicker {
  margin: 0 0 1rem;
  color: var(--fluoro-cyan);
}

.page-products__hero h1 {
  margin: 0 0 1.25rem;
  max-width: 22ch;
  font-family: var(--font-display);
  font-size: clamp(2rem, 5.4vw, 4.1rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-products__lede {
  margin: 0 0 0.85rem;
  max-width: 64ch;
  font-size: clamp(0.98rem, 1.25vw, 1.12rem);
  line-height: 1.8;
  color: var(--mist-text);
}

.page-products__lede:last-of-type {
  margin-bottom: 0;
}

.page-products__stats {
  list-style: none;
  margin: clamp(1.75rem, 3.5vw, 2.75rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--moss-line);
  border: 1px solid var(--moss-line);
}

.page-products__stats li {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 0.95rem 1.05rem;
  background: var(--ink-abyss);
}

.page-products__stats .data-num {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 2.6vw, 2.1rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--amber-orange);
  font-variant-numeric: tabular-nums;
}

.page-products__stats li > span:last-child {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--mist-dim);
}

/* ---------- 版面骨架 ---------- */

.page-products__layout {
  max-width: 1560px;
  margin: 0 auto;
  padding: clamp(2rem, 4.5vw, 3.5rem) var(--gutter) 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.5rem, 3vw, 2.5rem);
  align-items: start;
}

.page-products__index {
  min-width: 0;
}

.page-products__index-title {
  margin: 0 0 0.75rem;
  color: var(--mist-dim);
}

.page-products__index-list {
  list-style: none;
  margin: 0;
  padding: 0 0 0.5rem;
  display: flex;
  gap: 0.4rem;
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-products__index-link {
  display: flex;
  align-items: baseline;
  gap: 0.55rem;
  padding: 0.45rem 0.8rem;
  border: 1px solid transparent;
  font-size: 13px;
  line-height: 1.45;
  white-space: nowrap;
  color: var(--mist-dim);
  text-decoration: none;
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}

.page-products__index-link .idx {
  font-size: 10px;
  color: var(--graphite);
  transition: color var(--dur) var(--ease);
}

.page-products__index-link:hover,
.page-products__index-link:focus-visible {
  color: var(--paper);
  background: var(--cyan-glass);
  border-color: rgba(53, 240, 208, 0.4);
  outline: none;
}

.page-products__index-link:hover .idx,
.page-products__index-link:focus-visible .idx {
  color: var(--fluoro-cyan);
}

.page-products__index-link:focus-visible {
  box-shadow: 0 0 0 2px var(--fluoro-cyan);
}

.page-products__flow {
  min-width: 0;
}

/* ---------- 章节 ---------- */

.page-products__section {
  padding: clamp(2.25rem, 4.5vw, 3.75rem) 0;
  border-top: 1px solid var(--moss-line);
  scroll-margin-top: calc(var(--topline-h) + 1.5rem);
}

.page-products__section:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-products__head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  margin-bottom: clamp(1.25rem, 2.5vw, 1.85rem);
}

.page-products__head .idx {
  color: var(--graphite);
  font-size: 11px;
}

.page-products__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.6vw, 2.05rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.01em;
  color: var(--paper);
}

/* ---------- 图形 ---------- */

.page-products__figure {
  margin: 0 0 clamp(1.5rem, 3vw, 2.25rem);
}

.page-products__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--moss-line);
  background: var(--ink-surface);
  object-fit: cover;
}

.page-products__figure figcaption {
  margin-top: 0.7rem;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  line-height: 1.7;
  color: var(--mist-dim);
}

/* ---------- 说明行 ---------- */

.page-products__facts {
  margin: 0 0 1.5rem;
  padding: 0;
  border-top: 1px solid var(--moss-line);
}

.page-products__fact {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.3rem;
  padding: 1rem 0.5rem;
  border-bottom: 1px solid var(--moss-line);
  transition: background-color var(--dur) var(--ease);
}

.page-products__fact:hover,
.page-products__fact:focus-within {
  background: var(--cyan-glass);
}

.page-products__fact dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  line-height: 1.7;
  color: var(--fluoro-cyan);
}

.page-products__fact dd {
  margin: 0;
  max-width: 62ch;
  font-size: 0.95rem;
  line-height: 1.78;
  color: var(--mist-text);
}

/* ---------- 适用场景 ---------- */

.page-products__scene {
  margin: 0;
  padding: 0.85rem 1rem;
  border-left: 2px solid var(--amber-orange);
  background: rgba(255, 179, 71, 0.055);
  font-size: 0.92rem;
  line-height: 1.72;
  color: var(--mist-text);
}

.page-products__scene .idx {
  margin-right: 0.6rem;
  color: var(--amber-orange);
}

/* ---------- 抢断视图切换 ---------- */

.page-products__switch {
  position: relative;
  margin: 0 0 1.5rem;
}

.page-products__switch-input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.page-products__tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.page-products__tabs label {
  display: inline-block;
  padding: 0.45rem 0.9rem;
  border: 1px solid var(--moss-line);
  background: var(--ink-deep);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--mist-dim);
  cursor: pointer;
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}

.page-products__tabs label:hover {
  color: var(--paper);
  border-color: rgba(53, 240, 208, 0.5);
}

.page-products #prod-view-1:checked ~ .page-products__tabs label[for="prod-view-1"],
.page-products #prod-view-2:checked ~ .page-products__tabs label[for="prod-view-2"],
.page-products #prod-view-3:checked ~ .page-products__tabs label[for="prod-view-3"] {
  color: var(--ink-abyss);
  background: var(--fluoro-cyan);
  border-color: var(--fluoro-cyan);
}

.page-products #prod-view-1:focus-visible ~ .page-products__tabs label[for="prod-view-1"],
.page-products #prod-view-2:focus-visible ~ .page-products__tabs label[for="prod-view-2"],
.page-products #prod-view-3:focus-visible ~ .page-products__tabs label[for="prod-view-3"] {
  outline: 2px solid var(--fluoro-cyan);
  outline-offset: 2px;
}

.page-products__panel {
  display: none;
}

.page-products #prod-view-1:checked ~ .page-products__panels .page-products__panel[data-panel="1"],
.page-products #prod-view-2:checked ~ .page-products__panels .page-products__panel[data-panel="2"],
.page-products #prod-view-3:checked ~ .page-products__panels .page-products__panel[data-panel="3"] {
  display: block;
}

.page-products__panel p {
  margin: 0;
  max-width: 62ch;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--mist-text);
}

/* ---------- 字段清单 ---------- */

.page-products__fields {
  list-style: none;
  margin: 0 0 1.5rem;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--moss-line);
  border: 1px solid var(--moss-line);
}

.page-products__fields li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.3rem 1rem;
  padding: 0.75rem 0.9rem;
  background: var(--ink-abyss);
  transition: background-color var(--dur) var(--ease);
}

.page-products__fields li:hover {
  background: var(--ink-deep);
}

.page-products__fields code {
  flex: 0 0 auto;
  min-width: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--fluoro-cyan);
}

.page-products__fields span {
  flex: 1 1 16ch;
  min-width: 0;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--mist-dim);
}

/* ---------- 折叠面板 ---------- */

.page-products__fold {
  margin-top: 1rem;
  border-top: 1px solid var(--moss-line);
  padding-top: 0.9rem;
}

.page-products__fold summary {
  cursor: pointer;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  line-height: 1.6;
  color: var(--fluoro-cyan);
  transition: color var(--dur) var(--ease);
}

.page-products__fold summary::-webkit-details-marker {
  display: none;
}

.page-products__fold summary::before {
  content: "+ ";
  color: var(--mist-dim);
}

.page-products__fold[open] summary::before {
  content: "- ";
}

.page-products__fold summary:hover,
.page-products__fold summary:focus-visible {
  color: var(--paper);
  outline: none;
}

.page-products__fold summary:focus-visible {
  box-shadow: 0 0 0 2px var(--fluoro-cyan);
}

.page-products__fold p {
  margin: 0.75rem 0 0;
  max-width: 62ch;
  font-size: 0.93rem;
  line-height: 1.78;
  color: var(--mist-text);
}

/* ---------- 收束区 ---------- */

.page-products__cta {
  margin-top: clamp(2.5rem, 5vw, 4rem);
  padding: clamp(2rem, 4vw, 3.25rem) clamp(1.25rem, 3.5vw, 2.75rem);
  border: 1px solid var(--moss-line);
  background:
    radial-gradient(110% 140% at 0% 0%, rgba(53, 240, 208, 0.10), transparent 60%),
    var(--ink-deep);
}

.page-products__cta h2 {
  margin: 0 0 0.9rem;
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2.4vw, 1.85rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--paper);
}

.page-products__cta p {
  margin: 0 0 1.5rem;
  max-width: 60ch;
  font-size: 0.96rem;
  line-height: 1.8;
  color: var(--mist-text);
}

.page-products__cta-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ---------- 入场 ---------- */

.page-products [data-reveal].is-visible {
  animation: pp-fade-up 420ms var(--ease) both;
}

@keyframes pp-fade-up {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-products__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-products__fact {
    grid-template-columns: minmax(6rem, 9.5rem) minmax(0, 1fr);
    gap: 0.4rem 1.5rem;
    padding: 1.1rem 0.75rem;
  }

  .page-products__fact dt {
    padding-top: 0.15rem;
  }

  .page-products__fields {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (min-width: 1080px) {
  .page-products__layout {
    grid-template-columns: var(--pp-idx-w) minmax(0, 1fr);
    gap: clamp(2.5rem, 5vw, 5rem);
  }

  .page-products__index {
    position: sticky;
    top: calc(var(--topline-h) + 2.25rem);
    align-self: start;
  }

  .page-products__index-list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
    border-left: 1px solid var(--moss-line);
  }

  .page-products__index-link {
    display: flex;
    white-space: normal;
    margin-left: -1px;
    padding: 0.6rem 0.8rem;
    border: 0;
    border-left: 2px solid transparent;
    font-size: 13px;
  }

  .page-products__index-link:hover,
  .page-products__index-link:focus-visible {
    background: var(--cyan-glass);
    border-left-color: var(--fluoro-cyan);
    box-shadow: none;
  }

  .page-products__index-link:focus-visible {
    outline: 2px solid var(--fluoro-cyan);
    outline-offset: -2px;
  }
}

@media (min-width: 1400px) {
  .page-products__fields {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products [data-reveal].is-visible {
    animation: none;
  }

  .page-products__fact,
  .page-products__fields li,
  .page-products__index-link,
  .page-products__tabs label {
    transition: none;
  }
}