.page-products {
  --prod-rail: 172px;
  --prod-gap: clamp(28px, 4.5vw, 64px);
  --prod-inset: clamp(20px, 3.2vw, 44px);
  --prod-block-y: clamp(40px, 6vw, 78px);
  background: var(--paper);
  color: var(--ink-text);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-products .prod-hero {
  position: relative;
  overflow: hidden;
  background: var(--ink-900);
  color: var(--text-on-dark);
  padding-block: clamp(28px, 4vw, 52px) clamp(44px, 7vw, 92px);
}

.page-products .prod-hero::before {
  content: "";
  position: absolute;
  top: -32%;
  right: -14%;
  width: 64%;
  height: 172%;
  background: var(--ink-800);
  transform: rotate(-9deg);
  pointer-events: none;
}

.page-products .prod-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line) 1px, transparent 1px);
  background-size: 72px 72px;
  opacity: .24;
  pointer-events: none;
  -webkit-mask-image: radial-gradient(130% 95% at 72% 40%, #000 15%, transparent 76%);
  mask-image: radial-gradient(130% 95% at 72% 40%, #000 15%, transparent 76%);
}

.page-products .prod-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 5vw, 56px);
  align-items: center;
}

.page-products .prod-hero .breadcrumb {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
}

.page-products .prod-hero .breadcrumb a {
  color: var(--text-on-dark);
  text-decoration: none;
}

.page-products .prod-hero .breadcrumb a:hover {
  color: var(--signal-soft);
}

.page-products .prod-hero h1 {
  margin: 14px 0 20px;
  max-width: 16ch;
}

.page-products .prod-hero h1 em {
  font-style: normal;
  color: var(--signal);
}

.page-products .prod-hero .lede {
  color: var(--text-on-dark);
  max-width: 42ch;
}

.page-products .prod-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-products .prod-hero__panel {
  position: relative;
}

.page-products .prod-hero__panel .figure__cap {
  color: var(--muted);
}

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

/* ---------- 画布与左侧刻度 ---------- */
.page-products .prod-canvas {
  padding-block: clamp(32px, 5vw, 72px) clamp(48px, 7vw, 96px);
}

.page-products .prod-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
}

.page-products .prod-rail {
  display: none;
}

.page-products .prod-rail__head {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--muted);
}

.page-products .prod-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 1px solid var(--line);
}

.page-products .prod-rail__list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 0 9px 14px;
  margin-left: -1px;
  border-left: 2px solid transparent;
  color: var(--ink-text-2);
  font-size: 13px;
  line-height: 1.45;
  text-decoration: none;
  transition: color .18s var(--ease), border-color .18s var(--ease), transform .18s var(--ease);
}

.page-products .prod-rail__list a:hover,
.page-products .prod-rail__list a:focus-visible {
  color: var(--ink-text);
  border-left-color: var(--signal);
  transform: translateX(4px);
}

.page-products .prod-rail__num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted);
}

/* ---------- 区块通用 ---------- */
.page-products .prod-block {
  padding-block: var(--prod-block-y);
  border-top: 1px solid rgba(13, 21, 38, .12);
}

.page-products .prod-stack > .prod-block:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-products .prod-block--ink,
.page-products .prod-block--navy {
  padding-inline: var(--prod-inset);
  color: var(--text-on-dark);
}

.page-products .prod-block--ink {
  background: var(--ink-900);
  border-top-color: transparent;
}

.page-products .prod-block--navy {
  background: var(--navy-600);
  border-top-color: transparent;
}

.page-products .prod-head {
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-products .prod-head .h2 {
  margin: 8px 0 14px;
  max-width: 22ch;
}

.page-products .prod-head__lede {
  margin: 0;
  max-width: 48ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-text-2);
}

.page-products .prod-block--ink .prod-head__lede,
.page-products .prod-block--navy .prod-head__lede {
  color: var(--text-on-dark);
  opacity: .82;
}

/* ---------- 01 服务清单 ---------- */
.page-products .svc-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-products .svc-item {
  display: grid;
  grid-template-columns: minmax(0, auto) minmax(0, 1fr);
  gap: clamp(14px, 2.4vw, 30px);
  padding-block: clamp(18px, 2.6vw, 28px);
  border-top: 1px solid rgba(13, 21, 38, .14);
}

.page-products .svc-item:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-products .svc-item__num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 4.2vw, 44px);
  line-height: .9;
  font-weight: 700;
  letter-spacing: -.04em;
  color: var(--line);
  opacity: .55;
}

.page-products .svc-item__body h3 {
  margin: 0 0 9px;
  font-size: clamp(17px, 2vw, 20px);
  letter-spacing: -.01em;
  color: var(--ink-text);
}

.page-products .svc-item__body p {
  margin: 0 0 10px;
  max-width: 54ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-text-2);
}

.page-products .svc-item__result {
  padding-left: 12px;
  border-left: 2px solid var(--signal);
  color: var(--ink-text) !important;
  font-size: 14px !important;
  line-height: 1.75;
}

/* ---------- 02 栏目切换 ---------- */
.page-products .v3-tabs {
  margin-bottom: clamp(18px, 2.6vw, 26px);
}

.page-products .prod-block--ink .segmented__tab {
  color: var(--muted);
}

.page-products .prod-block--ink .segmented__tab[aria-selected="true"] {
  color: var(--text-on-dark);
}

.page-products .v3-panel {
  margin-top: 16px;
  padding: clamp(18px, 2.8vw, 30px);
  background: rgba(234, 240, 248, .06);
  border-left: 2px solid var(--signal);
}

.page-products .v3-panel:first-child {
  margin-top: 0;
}

.page-products .v3-panel__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--signal);
}

.page-products .v3-panel p {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-on-dark);
}

/* ---------- 03 订阅 ---------- */
.page-products .subscribe-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.page-products .subscribe-media {
  max-width: 340px;
  margin-inline: auto;
}

.page-products .subscribe-copy__text {
  margin: 0 0 24px;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-text-2);
}

.page-products .seats {
  padding-top: 18px;
  border-top: 1px solid rgba(13, 21, 38, .14);
}

.page-products .seats__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--ink-text);
}

.page-products .seats__label .mono {
  font-size: 22px;
  font-weight: 700;
  color: var(--signal);
  margin-right: 4px;
}

.page-products .seats__row {
  display: grid;
  grid-template-columns: repeat(30, minmax(0, 1fr));
  gap: 3px;
}

.page-products .seat {
  display: block;
  height: clamp(16px, 3.4vw, 26px);
  border: 1px solid var(--line);
  opacity: .5;
}

.page-products .seat:nth-child(5n) {
  border-color: var(--signal);
  opacity: .9;
}

.page-products .seats__note {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-text-2);
}

/* ---------- 04 三层内容 ---------- */
.page-products .tier-figure {
  margin-bottom: clamp(24px, 3.4vw, 40px);
}

.page-products .prod-block--navy .figure__cap {
  color: rgba(234, 240, 248, .72);
}

.page-products .tier-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-products .tier {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  padding-block: clamp(18px, 2.6vw, 26px);
  border-top: 1px solid rgba(234, 240, 248, .22);
}

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

.page-products .tier__meta {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-products .tier__num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 700;
  letter-spacing: -.03em;
  line-height: 1;
  color: var(--signal-soft);
}

.page-products .tier__when {
  font-size: 12px;
  letter-spacing: .1em;
  color: rgba(234, 240, 248, .7);
}

.page-products .tier__body h3 {
  margin: 0 0 8px;
  font-size: clamp(17px, 2vw, 20px);
  color: var(--text-on-dark);
}

.page-products .tier__body p {
  margin: 0;
  max-width: 54ch;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(234, 240, 248, .86);
}

/* ---------- 05 数据归档 ---------- */
.page-products .data-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-products .data-copy__text {
  margin: 0 0 22px;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(234, 240, 248, .86);
}

.page-products .metric-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 18px;
  border-top: 1px solid rgba(234, 240, 248, .2);
  padding-top: 18px;
}

.page-products .metric-grid li {
  display: flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--text-on-dark);
}

.page-products .metric-dot {
  display: block;
  width: 8px;
  height: 8px;
  flex: 0 0 8px;
}

.page-products .metric-dot--ice {
  background: var(--ice);
}

.page-products .metric-dot--warm {
  background: var(--warm);
}

.page-products .prod-block--ink .figure__cap {
  color: var(--muted);
}

/* ---------- 06 收藏 ---------- */
.page-products .fav-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
}

.page-products .fav-media {
  max-width: 420px;
  margin-inline: auto;
}

.page-products .fav-copy__text {
  margin: 0 0 22px;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-text-2);
}

.page-products .fav-demo {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
}

.page-products .fav-demo__check {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-products .fav-demo__btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 48px;
  padding: 0 22px;
  border: 1px solid var(--signal);
  background: transparent;
  color: var(--signal);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: background-color .2s var(--ease), color .2s var(--ease);
}

.page-products .fav-demo__dot {
  display: block;
  width: 12px;
  height: 12px;
  border: 2px solid currentColor;
  border-radius: 50%;
  transition: background-color .2s var(--ease), transform .2s var(--ease);
}

.page-products .fav-demo__text--on {
  display: none;
}

.page-products .fav-demo__check:checked + .fav-demo__btn {
  background: var(--signal);
  color: var(--ink-900);
}

.page-products .fav-demo__check:checked + .fav-demo__btn .fav-demo__dot {
  background: currentColor;
  transform: scale(1.15);
}

.page-products .fav-demo__check:checked + .fav-demo__btn .fav-demo__text--off {
  display: none;
}

.page-products .fav-demo__check:checked + .fav-demo__btn .fav-demo__text--on {
  display: inline;
}

.page-products .fav-demo__check:focus-visible + .fav-demo__btn {
  outline: 2px solid var(--navy-600);
  outline-offset: 3px;
}

.page-products .fav-demo__hint {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-text-2);
}

/* ---------- 07 设备与主题 ---------- */
.page-products .spec-list {
  margin: 0 0 clamp(24px, 3vw, 36px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
}

.page-products .spec {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding-block: clamp(16px, 2.2vw, 22px);
  border-top: 1px solid rgba(13, 21, 38, .14);
}

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

.page-products .spec dt {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--ink-text);
}

.page-products .spec dd {
  margin: 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-text-2);
}

.page-products .prod-tail {
  margin: 0;
  padding-top: 20px;
  border-top: 2px solid var(--signal);
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-text-2);
}

.page-products .prod-tail a {
  color: var(--ink-text);
  text-decoration: underline;
  text-decoration-color: var(--signal);
  text-underline-offset: 3px;
}

.page-products .prod-tail a:hover {
  color: var(--signal);
}

/* ---------- 响应式 ---------- */
@media (min-width: 860px) {
  .page-products .prod-hero__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  }

  .page-products .subscribe-grid {
    grid-template-columns: minmax(0, .78fr) minmax(0, 1.22fr);
    align-items: start;
  }

  .page-products .subscribe-media {
    order: 1;
    max-width: none;
    margin-inline: 0;
  }

  .page-products .subscribe-copy {
    order: 2;
  }

  .page-products .tier {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: clamp(16px, 3vw, 36px);
    align-items: start;
  }

  .page-products .tier__meta {
    flex-direction: column;
    gap: 6px;
    padding-top: 2px;
  }

  .page-products .data-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  }

  .page-products .fav-grid {
    grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr);
  }

  .page-products .fav-media {
    max-width: none;
    margin-inline: 0;
  }

  .page-products .spec {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: clamp(16px, 3vw, 32px);
    align-items: baseline;
  }
}

@media (min-width: 960px) {
  .page-products .prod-grid {
    grid-template-columns: var(--prod-rail) minmax(0, 1fr);
    gap: var(--prod-gap);
  }

  .page-products .prod-rail {
    display: block;
    position: sticky;
    top: calc(var(--header-h) + 32px);
    align-self: start;
  }
}

@media (min-width: 1180px) {
  .page-products .metric-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products .prod-rail__list a,
  .page-products .fav-demo__btn,
  .page-products .fav-demo__dot {
    transition: none;
  }

  .page-products .prod-rail__list a:hover,
  .page-products .prod-rail__list a:focus-visible {
    transform: none;
  }
}