.page-products {
  --pr-gap: clamp(16px, 2.2vw, 26px);
  --pr-pad: clamp(18px, 2.6vw, 30px);
  --pr-scan: linear-gradient(90deg, var(--cyan-400), var(--cyan-200));
  --pr-frame: var(--line-700);
  background: var(--ink-950);
  color: var(--paper-100);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* ---------- 面包屑 ---------- */
.page-products .pr-crumb {
  padding-top: var(--step-18);
}
.page-products .pr-crumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: var(--step-12);
  letter-spacing: 0.02em;
  color: var(--muted-400);
}
.page-products .pr-crumb__list > li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--line-700);
}
.page-products .pr-crumb__link {
  color: var(--muted-400);
  text-decoration: none;
}
.page-products .pr-crumb__link:hover,
.page-products .pr-crumb__link:focus-visible {
  color: var(--cyan-400);
}

/* ---------- 首屏 ---------- */
.page-products .pr-hero {
  margin: clamp(16px, 2.4vw, 28px) 0 clamp(28px, 4vw, 52px);
  border: 1px solid var(--pr-frame);
  background:
    repeating-linear-gradient(90deg, rgba(53, 242, 208, 0.05) 0 1px, transparent 1px 88px),
    linear-gradient(160deg, var(--pitch-900) 0%, var(--ink-950) 78%);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}
.page-products .pr-hero__main {
  padding: clamp(22px, 3.4vw, 46px);
}
.page-products .pr-hero__eyebrow {
  margin: 0 0 var(--step-16);
  color: var(--cyan-400);
  font-family: var(--font-mono);
  font-size: var(--step-12);
  letter-spacing: 0.14em;
}
.page-products .pr-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(32px, 7vw, 64px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--paper-100);
}
.page-products .pr-hero__lead {
  margin: var(--step-18) 0 0;
  max-width: 48ch;
  font-size: var(--step-16);
  line-height: 1.75;
  color: var(--muted-400);
}
.page-products .pr-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--step-12);
  margin-top: var(--step-24);
}
.page-products .pr-hero__rail {
  margin: 0;
  padding: var(--step-18) clamp(22px, 3.4vw, 34px);
  list-style: none;
  border-top: 1px solid var(--pr-frame);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--step-16);
  background: rgba(4, 16, 13, 0.4);
}
.page-products .pr-hero__rail-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-left: 10px;
  border-left: 2px solid var(--line-700);
}
.page-products .pr-hero__rail-item:first-child {
  border-left-color: var(--amber-500);
}
.page-products .pr-hero__rail-num {
  font-size: var(--step-18);
  color: var(--amber-500);
  letter-spacing: 0.02em;
}
.page-products .pr-hero__rail-txt {
  font-size: var(--step-12);
  line-height: 1.6;
  color: var(--muted-400);
}

/* ---------- 布局骨架 ---------- */
.page-products .pr-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
}
.page-products .pr-body {
  min-width: 0;
}

/* ---------- 章节 ---------- */
.page-products .pr-sec {
  padding: clamp(28px, 4vw, 56px) 0;
  border-top: 1px solid var(--line-700);
}
.page-products .pr-sec:first-child {
  border-top: 0;
  padding-top: 0;
}
.page-products .pr-sec__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--step-16);
  align-items: start;
  margin-bottom: clamp(20px, 3vw, 34px);
}
.page-products .pr-sec__num {
  font-size: var(--step-32);
  line-height: 1;
  color: var(--cyan-400);
  letter-spacing: -0.02em;
}
.page-products .pr-sec__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 3.6vw, 32px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--paper-100);
}
.page-products .pr-sec__lead {
  margin: var(--step-12) 0 0;
  max-width: 60ch;
  font-size: var(--step-16);
  line-height: 1.75;
  color: var(--muted-400);
}

/* ---------- 服务卡片（对角错落） ---------- */
.page-products .pr-cards {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--pr-gap);
}
.page-products .pr-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--step-12);
  padding: var(--pr-pad);
  background: var(--pitch-900);
  border: 1px solid var(--pr-frame);
  border-radius: 0;
  transition: transform 220ms var(--ease), border-color 220ms var(--ease);
}
.page-products .pr-card::after {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  height: 2px;
  width: 0;
  background: var(--pr-scan);
  transition: width 260ms var(--ease);
}
.page-products .pr-card:hover,
.page-products .pr-card:focus-within {
  transform: translateY(-4px);
  border-color: rgba(53, 242, 208, 0.5);
}
.page-products .pr-card:hover::after,
.page-products .pr-card:focus-within::after {
  width: 100%;
}
.page-products .pr-card__media {
  border: 1px solid var(--line-700);
  overflow: hidden;
}
.page-products .pr-card__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 4 / 3;
}
.page-products .pr-card__num {
  margin: 0;
  font-size: var(--step-24);
  line-height: 1;
  color: var(--muted-400);
  letter-spacing: 0.02em;
  transition: color 200ms var(--ease);
}
.page-products .pr-card:hover .pr-card__num,
.page-products .pr-card:focus-within .pr-card__num {
  color: var(--cyan-400);
}
.page-products .pr-card__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--step-24);
  line-height: 1.2;
  color: var(--paper-100);
}
.page-products .pr-card__text {
  margin: 0;
  font-size: var(--step-16);
  line-height: 1.75;
  color: var(--muted-400);
}
.page-products .pr-card__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
  font-size: var(--step-14);
  line-height: 1.7;
  color: var(--muted-400);
}
.page-products .pr-card__list li {
  padding-left: 16px;
  position: relative;
}
.page-products .pr-card__list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.72em;
  width: 6px;
  height: 1px;
  background: var(--cyan-400);
}
.page-products .pr-card__tagrow {
  margin: auto 0 0;
  padding-top: var(--step-12);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* ---------- 时间轴 ---------- */
.page-products .pr-timeline {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  border-left: 1px solid var(--line-700);
}
.page-products .pr-tl {
  position: relative;
  padding: 0 0 var(--step-24) var(--step-24);
}
.page-products .pr-tl:last-child {
  padding-bottom: 0;
}
.page-products .pr-tl__dot {
  position: absolute;
  left: -6px;
  top: 6px;
  width: 11px;
  height: 11px;
  border: 2px solid var(--cyan-400);
  background: var(--ink-950);
}
.page-products .pr-tl--now .pr-tl__dot {
  border-color: var(--amber-500);
  background: var(--amber-500);
}
.page-products .pr-tl__label {
  margin: 0;
  font-size: var(--step-12);
  letter-spacing: 0.12em;
  color: var(--amber-500);
}
.page-products .pr-tl__name {
  margin: 6px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--step-18);
  line-height: 1.3;
  color: var(--paper-100);
}
.page-products .pr-tl__fold {
  margin-top: 8px;
}
.page-products .pr-tl__sum {
  display: inline-block;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-mono);
  font-size: var(--step-12);
  letter-spacing: 0.06em;
  color: var(--cyan-400);
  border-bottom: 1px solid transparent;
}
.page-products .pr-tl__sum::-webkit-details-marker {
  display: none;
}
.page-products .pr-tl__sum:hover,
.page-products .pr-tl__sum:focus-visible {
  border-bottom-color: var(--cyan-400);
}
.page-products .pr-tl__fold[open] .pr-tl__sum {
  color: var(--cyan-200);
}
.page-products .pr-tl__fold p {
  margin: 10px 0 0;
  font-size: var(--step-14);
  line-height: 1.75;
  color: var(--muted-400);
}
.page-products .pr-inline-note {
  margin: var(--step-24) 0 0;
  padding: var(--step-16) var(--step-18);
  border: 1px solid var(--line-700);
  border-left: 2px solid var(--amber-500);
  background: var(--pitch-900);
  font-size: var(--step-14);
  line-height: 1.75;
  color: var(--muted-400);
}
.page-products .pr-link {
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 242, 208, 0.45);
}
.page-products .pr-link:hover,
.page-products .pr-link:focus-visible {
  color: var(--cyan-200);
  border-bottom-color: var(--cyan-200);
}

/* ---------- 折叠面板 ---------- */
.page-products .pr-acc {
  border-top: 1px solid var(--line-700);
}
.page-products .pr-acc__item {
  border-bottom: 1px solid var(--line-700);
}
.page-products .pr-acc__item[open] {
  background: linear-gradient(90deg, rgba(18, 49, 42, 0.9), rgba(4, 16, 13, 0));
}
.page-products .pr-acc__sum {
  display: flex;
  align-items: baseline;
  gap: var(--step-16);
  padding: var(--step-18) var(--step-12) var(--step-18) 0;
  cursor: pointer;
  list-style: none;
}
.page-products .pr-acc__sum::-webkit-details-marker {
  display: none;
}
.page-products .pr-acc__sum::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: var(--step-18);
  line-height: 1;
  color: var(--muted-400);
  transition: transform 200ms var(--ease), color 200ms var(--ease);
}
.page-products .pr-acc__item[open] .pr-acc__sum::after {
  content: "−";
  color: var(--cyan-400);
}
.page-products .pr-acc__num {
  font-size: var(--step-14);
  color: var(--muted-400);
  transition: color 200ms var(--ease);
}
.page-products .pr-acc__item[open] .pr-acc__num {
  color: var(--cyan-400);
}
.page-products .pr-acc__label {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--step-18);
  line-height: 1.4;
  color: var(--paper-100);
}
.page-products .pr-acc__panel {
  padding: 0 0 var(--step-18) calc(var(--step-24) + 8px);
}
.page-products .pr-acc__panel p {
  margin: 0;
  max-width: 56ch;
  font-size: var(--step-16);
  line-height: 1.75;
  color: var(--muted-400);
}

/* ---------- 同步 ---------- */
.page-products .pr-sync {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--pr-gap);
}
.page-products .pr-sync__figure {
  margin: 0;
  padding: var(--pr-pad);
  border: 1px solid var(--pr-frame);
  background:
    repeating-linear-gradient(0deg, rgba(53, 242, 208, 0.045) 0 1px, transparent 1px 22px),
    var(--pitch-900);
}
.page-products .pr-sync__svg {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
}
.page-products .pr-sync__frame {
  fill: none;
  stroke: var(--line-700);
  stroke-width: 1.5;
}
.page-products .pr-sync__screen {
  fill: rgba(53, 242, 208, 0.08);
  stroke: var(--cyan-400);
  stroke-width: 1;
}
.page-products .pr-sync__hub {
  fill: none;
  stroke: var(--cyan-200);
  stroke-width: 1.5;
}
.page-products .pr-sync__wire {
  fill: none;
  stroke: var(--line-700);
  stroke-width: 1.5;
  stroke-dasharray: 5 5;
}
.page-products .pr-sync__node {
  fill: var(--cyan-400);
}
.page-products .pr-sync__node--amber {
  fill: var(--amber-500);
}
.page-products .pr-sync__caption {
  margin: var(--step-16) 0 0;
  font-family: var(--font-mono);
  font-size: var(--step-12);
  line-height: 1.7;
  letter-spacing: 0.02em;
  color: var(--muted-400);
}
.page-products .pr-sync__panel {
  padding: var(--pr-pad);
  border: 1px solid var(--pr-frame);
  background: var(--pitch-800);
}
.page-products .pr-sync__panel-title {
  margin: 0 0 var(--step-16);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--step-24);
  line-height: 1.25;
  color: var(--paper-100);
}
.page-products .pr-sync__list {
  margin: 0 0 var(--step-18);
  padding: 0;
  list-style: none;
  display: grid;
  gap: var(--step-12);
  font-size: var(--step-14);
  line-height: 1.7;
  color: var(--muted-400);
}
.page-products .pr-sync__list li {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: var(--step-12);
  align-items: baseline;
  padding-bottom: var(--step-12);
  border-bottom: 1px solid var(--line-700);
}
.page-products .pr-sync__k {
  font-size: var(--step-18);
  color: var(--amber-500);
}
.page-products .pr-sync__text {
  margin: 0 0 var(--step-18);
  font-size: var(--step-16);
  line-height: 1.75;
  color: var(--muted-400);
}

/* ---------- 筛选 ---------- */
.page-products .pr-filter {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  border: 1px solid var(--pr-frame);
}
.page-products .pr-filter__col {
  padding: var(--pr-pad);
  border-top: 1px solid var(--line-700);
}
.page-products .pr-filter__col:first-child {
  border-top: 0;
  border-left: 2px solid var(--cyan-400);
}
.page-products .pr-filter__group {
  margin: 0 0 8px;
  font-size: var(--step-12);
  letter-spacing: 0.1em;
  color: var(--cyan-400);
}
.page-products .pr-filter__desc {
  margin: 0;
  font-size: var(--step-14);
  line-height: 1.75;
  color: var(--muted-400);
}

/* ---------- 手机端 ---------- */
.page-products .pr-mobile {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--pr-gap);
  align-items: start;
}
.page-products .pr-mobile__media {
  border: 1px solid var(--pr-frame);
  overflow: hidden;
}
.page-products .pr-mobile__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}
.page-products .pr-mobile__text {
  padding: var(--pr-pad);
  border: 1px solid var(--pr-frame);
  background: var(--pitch-900);
}
.page-products .pr-mobile__title {
  margin: 0 0 var(--step-16);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--step-24);
  line-height: 1.25;
  color: var(--paper-100);
}
.page-products .pr-mobile__text p {
  margin: 0 0 var(--step-16);
  font-size: var(--step-16);
  line-height: 1.75;
  color: var(--muted-400);
}

/* ---------- 结尾召唤 ---------- */
.page-products .pr-cta {
  margin: clamp(24px, 4vw, 48px) 0 clamp(32px, 5vw, 64px);
  padding: clamp(24px, 4vw, 48px);
  border: 1px solid var(--line-700);
  border-top: 2px solid var(--cyan-400);
  background: linear-gradient(140deg, var(--pitch-800), var(--ink-950));
}
.page-products .pr-cta__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 4vw, 44px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--paper-100);
}
.page-products .pr-cta__text {
  margin: var(--step-12) 0 var(--step-24);
  max-width: 52ch;
  font-size: var(--step-16);
  line-height: 1.75;
  color: var(--muted-400);
}
.page-products .pr-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--step-12);
}

/* ---------- 章节索引 ---------- */
.page-products .pr-index {
  display: none;
}
.page-products .pr-index__head {
  margin: 0 0 var(--step-12);
  font-size: var(--step-12);
  letter-spacing: 0.14em;
  color: var(--cyan-400);
}
.page-products .pr-index__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 2px;
  border-left: 1px solid var(--line-700);
}
.page-products .pr-index__link {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 6px;
  align-items: baseline;
  padding: 6px 0 6px 10px;
  margin-left: -1px;
  border-left: 2px solid transparent;
  font-size: var(--step-12);
  line-height: 1.5;
  color: var(--muted-400);
  text-decoration: none;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}
.page-products .pr-index__link:hover,
.page-products .pr-index__link:focus-visible {
  color: var(--paper-100);
  border-left-color: var(--cyan-400);
}
.page-products .pr-index__link[data-active="true"] {
  color: var(--paper-100);
  border-left-color: var(--amber-500);
}
.page-products .pr-index__link[data-active="true"] .pr-index__n {
  color: var(--amber-500);
}
.page-products .pr-index__n {
  font-size: var(--step-12);
  color: var(--line-700);
}

/* ---------- 桌面 ---------- */
@media (min-width: 760px) {
  .page-products .pr-hero {
    grid-template-columns: minmax(0, 1fr) 260px;
  }
  .page-products .pr-hero__rail {
    border-top: 0;
    border-left: 1px solid var(--pr-frame);
    grid-template-columns: minmax(0, 1fr);
    align-content: center;
    gap: var(--step-18);
  }
  .page-products .pr-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
  }
  .page-products .pr-card--b {
    margin-top: 48px;
  }
  .page-products .pr-card--c {
    margin-top: -20px;
  }
  .page-products .pr-card--d {
    margin-top: 48px;
  }
  .page-products .pr-filter {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-products .pr-filter__col {
    border-top: 0;
    border-left: 1px solid var(--line-700);
  }
  .page-products .pr-filter__col:first-child {
    border-left: 2px solid var(--cyan-400);
  }
  .page-products .pr-mobile {
    grid-template-columns: minmax(0, 0.72fr) minmax(0, 1fr);
    gap: clamp(20px, 3vw, 40px);
  }
}

@media (min-width: 900px) {
  .page-products .pr-timeline {
    border-left: 0;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: var(--step-16);
    position: relative;
    padding-top: 26px;
  }
  .page-products .pr-timeline::before {
    content: "";
    position: absolute;
    top: 6px;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--line-700);
  }
  .page-products .pr-tl {
    padding: 0;
  }
  .page-products .pr-tl__dot {
    left: 0;
    top: -26px;
  }
  .page-products .pr-tl--now .pr-tl__dot {
    box-shadow: 0 0 0 4px rgba(255, 179, 71, 0.18);
  }
  .page-products .pr-sync {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: stretch;
  }
}

@media (min-width: 1100px) {
  .page-products .pr-layout {
    grid-template-columns: minmax(0, 1fr) 168px;
    gap: clamp(24px, 4vw, 56px);
  }
  .page-products .pr-index {
    display: block;
    position: sticky;
    top: calc(var(--head-h) + 24px);
    align-self: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products .pr-card,
  .page-products .pr-card::after,
  .page-products .pr-acc__sum::after,
  .page-products .pr-index__link {
    transition: none;
  }
  .page-products .pr-card:hover,
  .page-products .pr-card:focus-within {
    transform: none;
  }
}
</main>