.page-products {
  --pf-space: clamp(48px, 7vw, 96px);
  --pf-card-bg: #0A1122;
  --pf-card-line: #1E2A44;
  padding-bottom: clamp(40px, 7vw, 88px);
  background: radial-gradient(120% 70% at 82% -8%, rgba(43, 245, 192, .10), transparent 62%),
              radial-gradient(90% 60% at 0% 8%, rgba(124, 107, 255, .10), transparent 60%);
}

.page-products .pf-hero {
  padding-top: clamp(20px, 3vw, 36px);
}

.page-products .pf-hero__frame {
  position: relative;
  border: 1px solid var(--line-500);
  background:
    linear-gradient(135deg, rgba(18, 28, 51, .92), rgba(5, 9, 18, .96));
  padding: clamp(20px, 3.4vw, 44px) clamp(18px, 3vw, 40px);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 28px), calc(100% - 28px) 100%, 0 100%);
}

.page-products .pf-hero__frame::before,
.page-products .pf-hero__frame::after {
  content: "";
  position: absolute;
  top: 12px;
  bottom: 12px;
  width: 10px;
  background-image: repeating-linear-gradient(to bottom, var(--sig-400) 0 1px, transparent 1px 20px);
  opacity: .45;
  pointer-events: none;
}

.page-products .pf-hero__frame::before { left: 6px; }
.page-products .pf-hero__frame::after { right: 6px; }

.page-products .pf-hero__inner {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.page-products .pf-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--haze-400);
}

.page-products .pf-kicker__dot {
  width: 7px;
  height: 7px;
  background: var(--sig-400);
  box-shadow: 0 0 12px rgba(43, 245, 192, .8);
}

.page-products h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.4rem, 9vw, 5.2rem);
  line-height: .96;
  letter-spacing: .01em;
  color: var(--paper-100);
}

.page-products .pf-lead {
  margin: 18px 0 0;
  max-width: 34em;
  font-size: clamp(15px, 2.6vw, 17px);
  line-height: 1.8;
  color: var(--haze-400);
}

.page-products .pf-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-products .pf-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 30px 0 0;
  background: var(--line-500);
  border: 1px solid var(--line-500);
}

.page-products .pf-stat {
  padding: 14px 14px 16px;
  background: var(--ink-900);
}

.page-products .pf-stat__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--haze-400);
}

.page-products .pf-stat__num {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(20px, 4vw, 26px);
  font-weight: 700;
  color: var(--sig-400);
}

.page-products .pf-hero__media {
  margin: 0;
  border: 1px solid var(--line-500);
  background: var(--ink-800);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 34px), calc(100% - 34px) 100%, 0 100%);
}

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

.page-products .pf-hero__media figcaption {
  padding: 12px 16px 14px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--haze-400);
  border-top: 1px solid var(--line-500);
}

/* 章节索引 + 主体 */
.page-products .pf-rail {
  display: block;
  margin-top: clamp(28px, 5vw, 56px);
}

.page-products .pf-index {
  margin: 0 0 8px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-500);
}

.page-products .pf-index__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--haze-400);
}

.page-products .pf-index__list {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-width: thin;
}

.page-products .pf-index__list a {
  flex: 0 0 auto;
  padding: 6px 12px;
  font-size: 12px;
  color: var(--haze-400);
  text-decoration: none;
  border: 1px solid var(--line-500);
  white-space: nowrap;
}

.page-products .pf-index__list a:hover,
.page-products .pf-index__list a[aria-current="true"] {
  color: var(--ink-900);
  background: var(--sig-400);
  border-color: var(--sig-400);
}

.page-products .pf-section {
  padding-top: var(--pf-space);
  scroll-margin-top: 120px;
}

.page-products .pf-section__head {
  max-width: 54em;
  margin-bottom: clamp(22px, 3.4vw, 36px);
}

.page-products .pf-section__lead {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--haze-400);
}

/* 筛选 chips */
.page-products .pf-filter,
.page-products .pf-diff {
  position: relative;
}

.page-products .pf-filter__input,
.page-products .pf-diff__input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-products .pf-filter__chips,
.page-products .pf-diff__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.page-products .pf-chip {
  display: inline-block;
  padding: 7px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--haze-400);
  border: 1px solid var(--line-500);
  background: rgba(18, 28, 51, .5);
  cursor: pointer;
  transition: color .18s var(--ease), border-color .18s var(--ease), box-shadow .18s var(--ease);
}

.page-products .pf-chip:hover {
  color: var(--paper-100);
  border-color: var(--sig-700);
}

.page-products #pfb-all:checked ~ .pf-filter__chips label[for="pfb-all"],
.page-products #pfb-schedule:checked ~ .pf-filter__chips label[for="pfb-schedule"],
.page-products #pfb-data:checked ~ .pf-filter__chips label[for="pfb-data"],
.page-products #pfb-report:checked ~ .pf-filter__chips label[for="pfb-report"],
.page-products #pfb-legacy:checked ~ .pf-filter__chips label[for="pfb-legacy"],
.page-products #pfd-all:checked ~ .pf-diff__chips label[for="pfd-all"],
.page-products #pfd-structure:checked ~ .pf-diff__chips label[for="pfd-structure"],
.page-products #pfd-data:checked ~ .pf-diff__chips label[for="pfd-data"],
.page-products #pfd-tags:checked ~ .pf-diff__chips label[for="pfd-tags"] {
  color: var(--ink-900);
  background: var(--sig-400);
  border-color: var(--sig-400);
  box-shadow: 0 0 0 1px rgba(43, 245, 192, .35), 0 0 18px rgba(43, 245, 192, .25);
}

.page-products #pfb-schedule:checked ~ .pf-blocks .pf-block:not(.pf-block--schedule),
.page-products #pfb-data:checked ~ .pf-blocks .pf-block:not(.pf-block--data),
.page-products #pfb-report:checked ~ .pf-blocks .pf-block:not(.pf-block--report),
.page-products #pfb-legacy:checked ~ .pf-blocks .pf-block:not(.pf-block--legacy) {
  display: none;
}

.page-products #pfd-structure:checked ~ .pf-diff__table .pf-row:not(.pf-row--head):not(.pf-row--structure),
.page-products #pfd-data:checked ~ .pf-diff__table .pf-row:not(.pf-row--head):not(.pf-row--data),
.page-products #pfd-tags:checked ~ .pf-diff__table .pf-row:not(.pf-row--head):not(.pf-row--tags) {
  display: none;
}

/* 四个区块卡片 */
.page-products .pf-blocks {
  display: grid;
  gap: 14px;
}

.page-products .pf-block {
  position: relative;
  padding: 22px 20px 20px;
  background: var(--pf-card-bg);
  border: 1px solid var(--pf-card-line);
  border-left: 3px solid var(--sig-700);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 0 100%);
  transition: border-color .18s var(--ease), transform .18s var(--ease);
}

.page-products .pf-block:nth-child(even) {
  border-left-color: var(--violet-500);
}

.page-products .pf-block:hover {
  border-left-color: var(--sig-400);
  transform: translateY(-2px);
}

.page-products .pf-block__no {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--sig-400);
}

.page-products .pf-block__title {
  margin: 10px 0 8px;
  font-family: var(--font-display);
  font-size: clamp(19px, 3vw, 23px);
  font-weight: 700;
  line-height: 1.2;
  color: var(--paper-100);
}

.page-products .pf-block__text {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--haze-400);
}

.page-products .pf-block__link {
  font-size: 13px;
  color: var(--sig-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 245, 192, .35);
}

.page-products .pf-block__link:hover {
  color: var(--act-400);
  border-bottom-color: var(--act-400);
}

/* 数据说明 */
.page-products .pf-data-grid {
  display: grid;
  gap: 22px;
}

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

.page-products .pf-metric {
  display: grid;
  grid-template-columns: 68px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 18px 16px;
  background: rgba(10, 17, 34, .72);
  border: 1px solid var(--line-500);
}

.page-products .pf-metric__viz {
  display: flex;
  align-items: center;
  justify-content: center;
}

.page-products .pf-metric__svg {
  width: 64px;
  height: 64px;
  display: block;
}

.page-products .pf-metric__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  color: var(--sig-400);
  letter-spacing: .02em;
}

.page-products .pf-metric__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--haze-400);
}

.page-products .pf-figure {
  margin: 0;
  border: 1px solid var(--line-500);
  background: var(--ink-800);
}

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

.page-products .pf-figure figcaption {
  padding: 10px 14px 12px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--haze-400);
  border-top: 1px solid var(--line-500);
}

/* 更新节奏 */
.page-products .pf-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-left: 1px solid var(--line-500);
}

.page-products .pf-step {
  position: relative;
  padding: 0 0 26px 26px;
}

.page-products .pf-step:last-child {
  padding-bottom: 0;
}

.page-products .pf-step::before {
  content: "";
  position: absolute;
  left: -4.5px;
  top: 6px;
  width: 8px;
  height: 8px;
  background: var(--sig-400);
  box-shadow: 0 0 10px rgba(43, 245, 192, .7);
}

.page-products .pf-step__no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--sig-700);
}

.page-products .pf-step__title {
  margin: 6px 0 6px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  color: var(--paper-100);
}

.page-products .pf-step__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--haze-400);
}

/* 收藏与入口 */
.page-products .pf-pin {
  display: grid;
  gap: 22px;
}

.page-products .pf-pin__list {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-products .pf-pin__item {
  padding: 16px 18px;
  background: var(--pf-card-bg);
  border: 1px solid var(--line-500);
  border-right: 3px solid var(--violet-500);
}

.page-products .pf-pin__title {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  color: var(--paper-100);
}

.page-products .pf-pin__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--haze-400);
}

.page-products .pf-pin__fav {
  position: relative;
}

.page-products .pf-pin__fav-input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.page-products .pf-pin__fav-label {
  display: inline-block;
  padding: 12px 20px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .05em;
  color: var(--act-400);
  border: 1px solid var(--act-400);
  background: rgba(255, 138, 61, .08);
  cursor: pointer;
  transition: background .18s var(--ease), color .18s var(--ease);
}

.page-products .pf-pin__fav-label:hover {
  background: rgba(255, 138, 61, .18);
}

.page-products .pf-pin__fav-on {
  display: none;
}

.page-products .pf-pin__fav-input:checked ~ .pf-pin__fav-label {
  color: var(--ink-900);
  background: var(--act-400);
  border-color: var(--act-400);
}

.page-products .pf-pin__fav-input:checked ~ .pf-pin__fav-label .pf-pin__fav-off {
  display: none;
}

.page-products .pf-pin__fav-input:checked ~ .pf-pin__fav-label .pf-pin__fav-on {
  display: inline;
}

.page-products .pf-figure--tall {
  max-width: 420px;
  justify-self: center;
}

/* 旧版对照 */
.page-products .pf-figure--wide {
  margin-bottom: 22px;
}

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

.page-products .pf-legacy__note {
  padding: 16px 18px;
  border: 1px solid var(--line-500);
  background: linear-gradient(180deg, rgba(243, 239, 230, .06), rgba(10, 17, 34, .6));
}

.page-products .pf-legacy__note h3 {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 700;
  color: var(--sig-400);
}

.page-products .pf-legacy__note p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--haze-400);
}

.page-products .pf-inline-link {
  margin: 20px 0 0;
  font-size: 13px;
  color: var(--haze-400);
}

.page-products .pf-inline-link a {
  color: var(--sig-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 245, 192, .35);
}

.page-products .pf-inline-link a:hover {
  color: var(--act-400);
  border-bottom-color: var(--act-400);
}

/* 一天三个时段 */
.page-products .pf-day {
  display: grid;
  gap: 22px;
}

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

.page-products .pf-day__card {
  padding: 18px;
  background: rgba(18, 28, 51, .55);
  border: 1px solid var(--line-500);
  border-top: 3px solid var(--sig-700);
}

.page-products .pf-day__card:nth-child(2) { border-top-color: var(--violet-500); }
.page-products .pf-day__card:nth-child(3) { border-top-color: var(--act-400); }

.page-products .pf-day__time {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--sig-400);
}

.page-products .pf-day__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  color: var(--paper-100);
}

.page-products .pf-day__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--haze-400);
}

/* 差异清单 */
.page-products .pf-diff__table {
  border: 1px solid var(--line-500);
  background: rgba(10, 17, 34, .7);
}

.page-products .pf-row {
  display: grid;
  gap: 4px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line-500);
  font-size: 14px;
  line-height: 1.7;
}

.page-products .pf-row:last-child {
  border-bottom: 0;
}

.page-products .pf-row:nth-child(odd) {
  background: rgba(18, 28, 51, .45);
}

.page-products .pf-row--head {
  display: none;
}

.page-products .pf-row__k {
  font-weight: 700;
  color: var(--paper-100);
}

.page-products .pf-row__v2,
.page-products .pf-row__v3,
.page-products .pf-row__note {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--haze-400);
}

.page-products .pf-row__v3 {
  color: var(--sig-400);
}

.page-products .pf-row__note {
  font-family: var(--font-body);
  color: var(--haze-400);
}

.page-products .pf-row__v2::before {
  content: "V2.0 · ";
  color: var(--act-400);
}

.page-products .pf-row__v3::before {
  content: "V3.1 · ";
  color: var(--sig-700);
}

/* 上手 */
.page-products .pf-section--start {
  padding-top: var(--pf-space);
}

.page-products .pf-start__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-products .pf-start__step {
  padding: 18px;
  border: 1px solid var(--line-500);
  background: var(--pf-card-bg);
}

.page-products .pf-start__no {
  display: block;
  font-family: var(--font-display);
  font-size: 40px;
  font-weight: 700;
  line-height: 1;
  color: var(--sig-400);
  margin-bottom: 8px;
}

.page-products .pf-start__step h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  color: var(--paper-100);
}

.page-products .pf-start__step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--haze-400);
}

.page-products .pf-start__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 24px;
}

.page-products .pf-start__foot {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--haze-400);
}

.page-products .pf-start__foot a {
  color: var(--sig-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 245, 192, .35);
}

.page-products .pf-start__foot a:hover {
  color: var(--act-400);
  border-bottom-color: var(--act-400);
}

/* 断点 */
@media (min-width: 768px) {
  .page-products .pf-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-products .pf-block:nth-child(2) {
    margin-top: 22px;
  }

  .page-products .pf-block:nth-child(4) {
    margin-top: 22px;
  }

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

  .page-products .pf-timeline {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    border-left: 0;
    border-top: 1px solid var(--line-500);
  }

  .page-products .pf-step {
    padding: 24px 16px 0 0;
  }

  .page-products .pf-step::before {
    left: 0;
    top: -4.5px;
  }

  .page-products .pf-pin,
  .page-products .pf-day {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr);
    align-items: start;
  }

  .page-products .pf-figure--tall {
    justify-self: end;
  }

  .page-products .pf-legacy__notes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-products .pf-day__cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-products .pf-row {
    grid-template-columns: 150px minmax(0, 1fr) minmax(0, 1.2fr) minmax(0, 1.2fr);
    gap: 12px;
    align-items: baseline;
    padding: 13px 16px;
  }

  .page-products .pf-row--head {
    display: grid;
    background: rgba(43, 245, 192, .08);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .12em;
    text-transform: uppercase;
    color: var(--sig-400);
  }

  .page-products .pf-row__v2::before,
  .page-products .pf-row__v3::before {
    content: none;
  }

  .page-products .pf-start__steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-products .pf-rail {
    display: grid;
    grid-template-columns: 186px minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
    align-items: start;
  }

  .page-products .pf-index {
    position: sticky;
    top: calc(var(--header-h) + 18px);
    border-bottom: 0;
    border-left: 1px solid var(--line-500);
    padding: 0 0 0 14px;
    margin: 0;
  }

  .page-products .pf-index__list {
    flex-direction: column;
    overflow: visible;
  }

  .page-products .pf-index__list a {
    border: 0;
    padding: 7px 0;
    background: none;
    font-size: 13px;
    border-left: 2px solid transparent;
    margin-left: -16px;
    padding-left: 14px;
  }

  .page-products .pf-index__list a:hover,
  .page-products .pf-index__list a[aria-current="true"] {
    color: var(--sig-400);
    background: none;
    border-left-color: var(--sig-400);
  }

  .page-products .pf-hero__inner {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
    align-items: center;
  }

  .page-products .pf-blocks {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }

  .page-products .pf-block:nth-child(2) { margin-top: 34px; }
  .page-products .pf-block:nth-child(3) { margin-top: -12px; }
  .page-products .pf-block:nth-child(4) { margin-top: 22px; }
}
<<<END>>>