.page-products {
  --prod-slant: 6.12vw;
  --prod-rule: rgba(19, 26, 32, 0.16);
  --prod-rule-inv: rgba(232, 238, 242, 0.14);
  --prod-shadow: rgba(6, 14, 23, 0.28);
  background: var(--ink);
  overflow-x: hidden;
  font-family: var(--font-body);
  line-height: 1.85;
  color: var(--text-inv);
}

.page-products .prod-num {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

.page-products .prod-unit {
  font-family: var(--font-num);
  font-size: 0.52em;
  font-weight: 400;
  letter-spacing: 0.04em;
  margin-left: 0.28em;
  color: var(--mist);
}

.page-products .prod-dash {
  font-family: var(--font-num);
  font-size: 0.6em;
  margin: 0 0.2em;
  color: var(--mist);
}

/* 面包屑 */
.page-products .prod-crumb {
  background: var(--ink);
  border-bottom: 1px solid var(--prod-rule-inv);
}

.page-products .prod-crumb .wrap {
  padding-top: 14px;
  padding-bottom: 14px;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--mist);
  display: flex;
  align-items: center;
  gap: 8px;
}

.page-products .prod-crumb a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur-micro) var(--ease-in), border-color var(--dur-micro) var(--ease-in);
}

.page-products .prod-crumb a:hover,
.page-products .prod-crumb a:focus-visible {
  color: var(--lemon);
  border-bottom-color: var(--lemon);
}

.page-products .prod-crumb__sep {
  color: var(--lake-deep);
}

/* 索引轨道 */
.page-products .prod-rail {
  display: none;
}

@media (min-width: 1240px) {
  .page-products .prod-rail {
    display: flex;
    flex-direction: column;
    gap: 2px;
  }
  .page-products .prod-rail__text {
    font-size: 12px;
    letter-spacing: 0.08em;
  }
}

/* 首屏 */
.page-products .prod-hero {
  background: var(--paper);
  color: var(--text);
  padding: clamp(40px, 6vw, 78px) 0 clamp(56px, 8vw, 104px);
}

.page-products .prod-hero__grid {
  display: grid;
  gap: 36px;
}

@media (min-width: 900px) {
  .page-products .prod-hero__grid {
    grid-template-columns: minmax(0, 1.42fr) minmax(0, 0.58fr);
    align-items: end;
    gap: 56px;
  }
}

.page-products .prod-kicker {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-display);
  font-size: clamp(15px, 1.4vw, 18px);
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--lake-deep);
  margin: 0 0 18px;
}

.page-products .prod-h1 {
  margin: 0 0 24px;
  color: var(--text);
  text-wrap: balance;
}

.page-products .prod-h1__mark {
  font-style: normal;
  color: var(--coral);
  box-shadow: inset 0 -0.16em 0 rgba(242, 209, 75, 0.55);
}

.page-products .prod-lede {
  margin: 0;
  max-width: 32em;
  color: var(--text);
}

.page-products .prod-hero__facts {
  display: grid;
  border-top: 1px solid var(--prod-rule);
}

.page-products .prod-fact {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--prod-rule);
}

.page-products .prod-fact__k {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--lake-deep);
}

.page-products .prod-fact__v {
  margin: 0;
  font-size: clamp(22px, 2.6vw, 30px);
  font-weight: 700;
  color: var(--text);
  white-space: nowrap;
}

.page-products .prod-fact__v .prod-unit {
  color: var(--lake-deep);
}

/* 区块基础 */
.page-products .prod-section {
  position: relative;
  padding: clamp(56px, 8vw, 108px) 0;
}

.page-products .prod-section--tight {
  padding-top: clamp(44px, 6vw, 76px);
}

.page-products .prod-section--paper {
  background: var(--paper);
  color: var(--text);
}

.page-products .prod-section--ink {
  background: var(--ink);
  color: var(--text-inv);
}

.page-products .prod-section--moss {
  background: var(--moss);
  color: var(--text-inv);
}

.page-products .prod-section--paper + .prod-section--paper {
  border-top: 1px solid var(--prod-rule);
}

.page-products .prod-head {
  margin-bottom: clamp(32px, 4vw, 52px);
  max-width: 62em;
}

.page-products .prod-eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-display);
  font-size: clamp(14px, 1.3vw, 17px);
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--lake-deep);
  margin: 0 0 14px;
}

.page-products .prod-eyebrow--inv {
  color: var(--lake-soft);
}

.page-products .prod-h2 {
  margin: 0 0 14px;
  color: inherit;
  text-wrap: balance;
}

.page-products .prod-head__note {
  margin: 0;
  max-width: 34em;
  font-size: 16px;
  color: var(--lake-deep);
}

.page-products .prod-head--inv .prod-head__note {
  color: var(--mist);
}

/* 斜切过渡 */
.page-products .prod-slant {
  height: var(--prod-slant);
  background: var(--paper);
  clip-path: polygon(0 0, 100% 0, 0 100%);
  margin-bottom: -1px;
}

.page-products .prod-slant--moss {
  background: var(--moss);
  clip-path: polygon(0 0, 0 100%, 100% 0);
}

/* 三档对照卡 */
.page-products .prod-plans {
  display: grid;
  gap: 22px;
  align-items: start;
}

@media (min-width: 880px) {
  .page-products .prod-plans {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-products .prod-plan:nth-child(2) {
    transform: translateY(24px);
  }
  .page-products .prod-plan:nth-child(3) {
    transform: translateY(48px);
  }
  .page-products .prod-plans__foot {
    margin-top: 96px;
  }
}

.page-products .prod-plan {
  position: relative;
  background: var(--paper-2);
  padding: 26px 22px 24px 30px;
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
  box-shadow: 0 18px 34px -26px var(--prod-shadow);
}

.page-products .prod-plan::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 6px;
  background: var(--ribbon, var(--lake));
}

.page-products .prod-plan::after {
  content: "";
  position: absolute;
  inset: 0;
  border: 2px solid transparent;
  pointer-events: none;
  transition: border-color var(--dur-expand) var(--ease-in);
}

.page-products .prod-plan--lemon { --ribbon: var(--lemon); }
.page-products .prod-plan--lake { --ribbon: var(--lake); }
.page-products .prod-plan--coral { --ribbon: var(--coral); }

.page-products .prod-plan:has(details[open])::after {
  border-color: var(--coral);
}

.page-products .prod-plan__tag {
  margin: 0 0 10px;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--lake-deep);
}

.page-products .prod-plan__name {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(24px, 2.6vw, 30px);
  font-weight: 700;
  letter-spacing: 0.01em;
  line-height: 1.15;
  color: var(--text);
}

.page-products .prod-plan__period {
  margin: 0 0 14px;
  font-size: clamp(40px, 6vw, 62px);
  font-weight: 700;
  line-height: 1;
  color: var(--ink);
}

.page-products .prod-plan__period .prod-unit {
  color: var(--lake-deep);
}

.page-products .prod-plan__desc {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text);
}

.page-products .prod-plan__switch {
  margin: 0 0 16px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--lake-deep);
  padding-top: 12px;
  border-top: 1px dashed var(--prod-rule);
}

.page-products .prod-plan__summary {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text);
  padding: 8px 0;
  border-top: 1px solid var(--prod-rule);
}

.page-products .prod-plan__summary-text {
  flex: 1;
}

.page-products .prod-plans__foot {
  margin: 36px 0 0;
  max-width: 46em;
  font-size: 15px;
  color: var(--lake-deep);
}

/* 可展开组 */
.page-products .expand-group summary {
  list-style: none;
  cursor: pointer;
}

.page-products .expand-group summary::-webkit-details-marker {
  display: none;
}

.page-products .expand-group__num {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--coral);
}

.page-products .expand-group__arrow {
  display: inline-block;
  font-size: 20px;
  line-height: 1;
  color: var(--mist);
  transition: transform var(--dur-expand) var(--ease-in), color var(--dur-expand) var(--ease-in);
}

.page-products .expand-group[open] .expand-group__arrow {
  transform: rotate(90deg);
  color: var(--coral);
}

.page-products .expand-group__body {
  padding-top: 12px;
}

.page-products .prod-list {
  margin: 0;
  padding-left: 1.1em;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text);
}

.page-products .prod-list li + li {
  margin-top: 6px;
}

/* 指标区 */
.page-products .prod-figure {
  margin: 0 0 clamp(28px, 4vw, 48px);
}

.page-products .prod-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
}

.page-products .prod-figure--metrics {
  max-width: 880px;
  margin-left: auto;
}

.page-products .prod-figure--metrics img {
  aspect-ratio: 3 / 2;
}

.page-products .prod-figure__cap {
  margin: 12px 0 0;
  font-size: 13px;
  letter-spacing: 0.03em;
  color: var(--mist);
  max-width: 40em;
}

.page-products .prod-metrics__grid {
  display: grid;
  gap: 40px;
}

.page-products .prod-metrics {
  display: grid;
  gap: 0;
}

.page-products .prod-metric {
  display: grid;
  grid-template-columns: 46px 1fr;
  gap: 6px 14px;
  padding: 22px 0;
  border-top: 1px solid var(--prod-rule-inv);
  transition: background-color var(--dur-micro) var(--ease-in);
}

.page-products .prod-metric:last-child {
  border-bottom: 1px solid var(--prod-rule-inv);
}

.page-products .prod-metric__num {
  margin: 4px 0 0;
  font-family: var(--font-num);
  font-size: 14px;
  letter-spacing: 0.1em;
  color: var(--lake-soft);
}

.page-products .prod-metric__name {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.2vw, 26px);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text-inv);
}

.page-products .prod-metric__body {
  margin: 0 0 8px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--text-inv);
  max-width: 34em;
}

.page-products .prod-metric__note {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist);
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height var(--dur-expand) var(--ease-in), opacity var(--dur-micro) var(--ease-in);
}

.page-products .prod-metric:hover .prod-metric__note,
.page-products .prod-metric:focus-within .prod-metric__note {
  max-height: 6em;
  opacity: 1;
}

.page-products .prod-metric__meta {
  grid-column: 2;
  margin: 4px 0 0;
  justify-self: start;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink);
  background: var(--lemon);
  padding: 2px 8px;
}

.page-products .prod-metric [data-ref],
.page-products .prod-metric.is-linked {
  transition: background-color var(--dur-micro) var(--ease-in);
}

.page-products .prod-metric.is-linked {
  background: rgba(242, 209, 75, 0.16);
}

.page-products .prod-aside {
  border-top: 2px solid var(--lemon);
  padding-top: 18px;
}

.page-products .prod-aside__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--lemon);
}

.page-products .prod-aside__hint {
  margin: 0 0 16px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

.page-products .prod-aside__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-products .prod-aside__list li {
  border-top: 1px solid var(--prod-rule-inv);
}

.page-products .prod-aside__list li:last-child {
  border-bottom: 1px solid var(--prod-rule-inv);
}

.page-products .prod-aside__list .aside-link {
  display: block;
  padding: 11px 0;
  font-size: 14.5px;
  color: var(--text-inv);
  text-decoration: none;
  border-left: 3px solid transparent;
  padding-left: 10px;
  transition: border-color var(--dur-micro) var(--ease-in), color var(--dur-micro) var(--ease-in), background-color var(--dur-micro) var(--ease-in);
}

.page-products .prod-aside__list .aside-link:hover,
.page-products .prod-aside__list .aside-link:focus-visible {
  border-left-color: var(--lemon);
  color: var(--lemon);
  background: rgba(242, 209, 75, 0.08);
}

.page-products .prod-aside__foot {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--mist);
}

/* 轨迹线 */
.page-products .prod-trail {
  padding: 8px 0 24px;
}

.page-products .prod-trail svg {
  display: block;
  width: 100%;
  height: 56px;
  overflow: visible;
}

.page-products .prod-trail__path {
  fill: none;
  stroke: var(--lake);
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  animation: prod-draw var(--dur-line) var(--ease-in) forwards;
}

@keyframes prod-draw {
  to { stroke-dashoffset: 0; }
}

/* 大屏赛程 */
.page-products .prod-figure--screen img {
  aspect-ratio: 16 / 9;
}

.page-products .prod-timeline {
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x proximity;
  padding: 6px 0 14px;
  -webkit-overflow-scrolling: touch;
}

.page-products .prod-timeline__list {
  display: flex;
  gap: 18px;
  min-width: max-content;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-products .prod-tl {
  width: 248px;
  flex: 0 0 auto;
  scroll-snap-align: start;
  background: rgba(232, 238, 242, 0.05);
  border-top: 3px solid var(--lake);
  padding: 16px 16px 18px;
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
}

.page-products .prod-tl:nth-child(3) {
  border-top-color: var(--lemon);
}

.page-products .prod-tl:nth-child(4) {
  border-top-color: var(--coral);
}

.page-products .prod-tl__stage {
  margin: 0 0 6px;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-products .prod-tl__name {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text-inv);
}

.page-products .prod-tl__body {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-inv);
}

.page-products .prod-tl__tag {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.page-products .prod-chip {
  display: inline-block;
  font-family: var(--font-num);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  padding: 2px 8px;
  color: var(--mist);
  border: 1px solid var(--prod-rule-inv);
}

.page-products .prod-chip--lake {
  color: var(--ink);
  background: var(--lake);
  border-color: var(--lake);
}

.page-products .prod-chip--lemon {
  color: var(--ink);
  background: var(--lemon);
  border-color: var(--lemon);
}

.page-products .prod-chip--coral {
  color: var(--ink);
  background: var(--coral);
  border-color: var(--coral);
}

.page-products .prod-scroll-hint {
  margin: 4px 0 0;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

/* 双端同步 */
.page-products .prod-duo {
  display: grid;
  gap: 22px;
  margin-bottom: clamp(28px, 4vw, 46px);
}

@media (min-width: 760px) {
  .page-products .prod-duo {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 32px;
  }
  .page-products .prod-duo__col:nth-child(2) {
    margin-top: var(--baseline);
  }
}

.page-products .prod-duo__col {
  padding: 22px 20px 24px;
  border-left: 6px solid var(--lake);
  background: rgba(232, 238, 242, 0.05);
}

.page-products .prod-duo__col:nth-child(2) {
  border-left-color: var(--lemon);
}

.page-products .prod-duo__k {
  margin: 0 0 6px;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--lake-soft);
}

.page-products .prod-duo__col:nth-child(2) .prod-duo__k {
  color: var(--lemon);
}

.page-products .prod-duo__name {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(22px, 2.4vw, 28px);
  font-weight: 700;
  color: var(--text-inv);
}

.page-products .prod-duo__body {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-inv);
  max-width: 32em;
}

.page-products .prod-duo__meta {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

.page-products .prod-figure--sync {
  margin-bottom: 0;
}

.page-products .prod-figure--sync img {
  aspect-ratio: 7 / 4;
}

/* 费用周期 */
.page-products .prod-cost {
  max-width: 900px;
}

.page-products .prod-qa {
  border-top: 1px solid var(--prod-rule);
}

.page-products .prod-qa:last-of-type {
  border-bottom: 1px solid var(--prod-rule);
}

.page-products .prod-qa__summary {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 18px 0;
  font-family: var(--font-display);
  font-size: clamp(18px, 2vw, 23px);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text);
}

.page-products .prod-qa__q {
  flex: 1;
}

.page-products .prod-qa__body {
  padding: 0 0 20px 44px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--text);
  max-width: 40em;
}

.page-products .prod-qa__body p {
  margin: 0 0 10px;
}

.page-products .prod-qa__body p:last-child {
  margin-bottom: 0;
}

.page-products .prod-qa__body .link {
  color: var(--lake-deep);
  text-decoration: none;
  border-bottom: 2px solid var(--lemon);
  font-weight: 600;
  transition: color var(--dur-micro) var(--ease-in), border-color var(--dur-micro) var(--ease-in);
}

.page-products .prod-qa__body .link:hover,
.page-products .prod-qa__body .link:focus-visible {
  color: var(--coral);
  border-bottom-color: var(--coral);
}

/* 搭配建议 */
.page-products .prod-picks {
  display: grid;
  gap: 20px;
  margin-bottom: clamp(30px, 4vw, 52px);
}

@media (min-width: 800px) {
  .page-products .prod-picks {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-products .prod-pick:nth-child(2) {
    transform: translateY(24px);
  }
  .page-products .prod-pick:nth-child(3) {
    transform: translateY(48px);
  }
}

.page-products .prod-pick {
  background: rgba(232, 238, 242, 0.05);
  padding: 20px 18px 22px;
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
}

.page-products .prod-pick__num {
  margin: 0 0 8px;
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--coral);
}

.page-products .prod-pick__name {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 700;
  color: var(--text-inv);
}

.page-products .prod-pick__body {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text-inv);
}

.page-products .prod-figure--band {
  margin-bottom: 0;
}

.page-products .prod-figure--band img {
  aspect-ratio: 8 / 3;
}

/* 下一步 */
.page-products .prod-next {
  border-top: 1px solid var(--prod-rule-inv);
}

.page-products .prod-next__grid {
  display: grid;
  gap: 26px;
}

@media (min-width: 820px) {
  .page-products .prod-next__grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
    align-items: center;
    gap: 48px;
  }
}

.page-products .prod-next__body {
  margin: 12px 0 0;
  max-width: 34em;
  font-size: 15.5px;
  color: var(--mist);
}

.page-products .prod-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-products .prod-next__actions .btn {
  font-family: var(--font-display);
  letter-spacing: 0.08em;
}

/* 窄屏保护 */
@media (max-width: 520px) {
  .page-products .prod-metric {
    grid-template-columns: 34px 1fr;
  }
  .page-products .prod-metric__meta {
    grid-column: 2;
  }
  .page-products .prod-qa__body {
    padding-left: 0;
  }
  .page-products .prod-tl {
    width: 216px;
  }
  .page-products .prod-plan {
    padding-left: 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products * {
    animation-duration: 0.12s !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.12s !important;
  }
  .page-products .prod-trail__path {
    stroke-dashoffset: 0;
  }
}