.page-products {
  --pd-rail-w: 232px;
  --pd-gap: 20px;
  background: var(--by-ink);
  color: var(--by-text);
  font-family: var(--by-font-body);
  overflow-x: hidden;
}

/* ---------- 封面 ---------- */
.page-products .pd-cover {
  position: relative;
  padding: 24px 0 48px;
  border-bottom: 1px solid var(--by-line);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(199, 255, 61, 0.09), transparent 58%),
    linear-gradient(180deg, var(--by-forest), var(--by-ink));
  overflow: hidden;
}

.page-products .pd-cover::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--by-line-soft) 1px, transparent 1px),
    linear-gradient(to bottom, var(--by-line-soft) 1px, transparent 1px);
  background-size: 96px 96px;
  opacity: 0.4;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 88%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 88%);
}

.page-products .pd-cover > .by-shell {
  position: relative;
  z-index: 1;
}

.page-products .pd-cover .by-breadcrumb {
  margin-bottom: 28px;
}

.page-products .pd-cover__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
}

.page-products .pd-eyebrow {
  display: inline-block;
  margin: 0;
  font-family: var(--by-font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--by-lime);
  padding-bottom: 8px;
  border-bottom: 1px solid var(--by-line);
}

.page-products .pd-cover__title {
  margin: 18px 0 18px;
  font-family: var(--by-font-display);
  font-weight: 700;
  font-size: clamp(34px, 7vw, 66px);
  line-height: 1.04;
  letter-spacing: -0.01em;
  color: var(--by-text);
}

.page-products .pd-cover__title em {
  font-style: normal;
  color: var(--by-lime);
  position: relative;
}

.page-products .pd-cover__lede {
  margin: 0;
  max-width: 60ch;
  color: var(--by-muted);
  font-size: 16px;
  line-height: 1.78;
}

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

.page-products .pd-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
  background: var(--by-line);
  border: 1px solid var(--by-line);
}

.page-products .pd-fact {
  background: var(--by-panel);
  padding: 14px 16px 16px;
}

.page-products .pd-fact__num {
  display: block;
  font-family: var(--by-font-mono);
  font-size: 26px;
  line-height: 1.1;
  font-weight: 600;
  color: var(--by-lime);
  letter-spacing: 0.01em;
}

.page-products .pd-fact__unit {
  font-size: 13px;
  margin-left: 2px;
  color: var(--by-muted);
}

.page-products .pd-fact__label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  line-height: 1.5;
  color: var(--by-muted);
}

.page-products .pd-cover__figure {
  position: relative;
  margin: 0;
  border: 1px solid var(--by-line);
  background: var(--by-panel);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 22px 100%, 0 calc(100% - 22px));
}

.page-products .pd-cover__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 16 / 10;
  opacity: 0.92;
}

.page-products .pd-cover__tag {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 8px 14px;
  background: rgba(11, 15, 13, 0.82);
  border-top: 1px solid var(--by-line);
  border-right: 1px solid var(--by-line);
  font-family: var(--by-font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--by-lime);
}

/* ---------- 主体两栏 ---------- */
.page-products .pd-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  padding: 40px 0 56px;
}

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

.page-products .pd-flow {
  min-width: 0;
}

/* ---------- 章节头 ---------- */
.page-products .pd-module {
  padding: 34px 0 40px;
  border-bottom: 1px solid var(--by-line-soft);
  scroll-margin-top: calc(var(--by-header-h) + 20px);
}

.page-products .pd-module:first-of-type {
  padding-top: 0;
}

.page-products .pd-module:last-of-type {
  border-bottom: none;
}

.page-products .pd-head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 22px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--by-line);
}

.page-products .pd-head__index {
  flex: none;
  font-family: var(--by-font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--by-lime);
  border: 1px solid var(--by-line);
  padding: 4px 8px;
  margin-top: 4px;
}

.page-products .pd-head__body {
  flex: 1 1 auto;
  min-width: 0;
}

.page-products .pd-head__title {
  margin: 0;
  font-family: var(--by-font-display);
  font-weight: 700;
  font-size: clamp(23px, 3.6vw, 36px);
  line-height: 1.14;
  color: var(--by-text);
}

.page-products .pd-head__note {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--by-muted);
  letter-spacing: 0.02em;
}

.page-products .pd-text {
  margin: 0 0 20px;
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--by-text);
}

.page-products .pd-caption {
  margin: 10px 0 0;
  font-size: 12px;
  line-height: 1.6;
  color: var(--by-dim);
}

/* ---------- 四面板 ---------- */
.page-products .pd-panels {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: 24px;
}

.page-products .pd-panel {
  position: relative;
  background: var(--by-panel);
  border: 1px solid var(--by-line);
  padding: 22px 22px 20px;
  transition: border-color 0.18s var(--by-ease), transform 0.18s var(--by-ease);
}

.page-products .pd-panel::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 0 0 16px 16px;
  border-color: transparent transparent var(--by-line) transparent;
}

.page-products .pd-panel:hover {
  border-color: var(--by-lime);
  transform: translateY(-2px);
}

.page-products .pd-panel__mark {
  display: block;
  font-family: var(--by-font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--by-lime);
  margin-bottom: 10px;
}

.page-products .pd-panel__title {
  margin: 0 0 10px;
  font-family: var(--by-font-display);
  font-size: 22px;
  line-height: 1.2;
  font-weight: 700;
  color: var(--by-text);
}

.page-products .pd-panel__text {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--by-muted);
}

.page-products .pd-panel__link {
  font-size: 13px;
}

/* ---------- 图文分栏 ---------- */
.page-products .pd-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  margin-top: 22px;
}

.page-products .pd-split__main {
  min-width: 0;
}

.page-products .pd-split__aside {
  margin: 0;
  border: 1px solid var(--by-line);
  background: var(--by-panel);
  overflow: hidden;
}

.page-products .pd-split__aside img,
.page-products .pd-compat__figure img,
.page-products .pd-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 3 / 2;
  opacity: 0.9;
}

/* ---------- 表格 ---------- */
.page-products .pd-scroll {
  max-height: 400px;
  overflow: auto;
  border: 1px solid var(--by-line);
  background: var(--by-panel);
  -webkit-overflow-scrolling: touch;
}

.page-products .pd-table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-products .pd-table__caption {
  caption-side: top;
  text-align: left;
  padding: 12px 14px 10px;
  font-family: var(--by-font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--by-dim);
  background: var(--by-panel);
}

.page-products .pd-table thead th {
  position: sticky;
  top: 0;
  z-index: 2;
  background: var(--by-panel-2);
  color: var(--by-muted);
  font-weight: 500;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-align: left;
  padding: 11px 14px;
  border-bottom: 1px solid var(--by-line);
  white-space: nowrap;
}

.page-products .pd-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--by-line-soft);
  color: var(--by-text);
  white-space: nowrap;
}

.page-products .pd-table tbody tr:last-child td {
  border-bottom: none;
}

.page-products .pd-table tbody tr:hover td {
  background: rgba(199, 255, 61, 0.07);
}

.page-products .pd-num {
  font-family: var(--by-font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--by-text);
}

.page-products .pd-pill {
  display: inline-block;
  font-size: 11px;
  line-height: 1;
  padding: 5px 8px;
  border: 1px solid var(--by-line);
  color: var(--by-muted);
  white-space: nowrap;
}

.page-products .pd-pill--live {
  color: var(--by-ink);
  background: var(--by-lime);
  border-color: var(--by-lime);
  font-weight: 600;
}

/* ---------- 要点列表 ---------- */
.page-products .pd-points {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--by-line);
  border: 1px solid var(--by-line);
}

.page-products .pd-point {
  background: var(--by-panel);
  padding: 14px 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--by-muted);
}

.page-products .pd-point strong {
  display: block;
  margin-bottom: 4px;
  font-family: var(--by-font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--by-lime);
  font-weight: 500;
}

/* ---------- 筛选标签 ---------- */
.page-products .pd-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin: 22px 0 4px;
}

.page-products .pd-tag {
  font-family: inherit;
  font-size: 13px;
  line-height: 1;
  padding: 10px 14px;
  color: var(--by-muted);
  background: transparent;
  border: 1px solid var(--by-line);
  border-radius: var(--by-radius);
  cursor: pointer;
  transition: color 0.16s var(--by-ease), border-color 0.16s var(--by-ease),
    background-color 0.16s var(--by-ease);
}

.page-products .pd-tag:hover {
  color: var(--by-text);
  border-color: var(--by-dim);
}

.page-products .pd-tag[aria-pressed="true"] {
  background: var(--by-lime);
  border-color: var(--by-lime);
  color: var(--by-ink);
  font-weight: 600;
}

.page-products .pd-tag:focus-visible {
  outline: 2px solid var(--by-focus);
  outline-offset: 2px;
}

/* ---------- 关注列表 ---------- */
.page-products .pd-watch {
  border: 1px solid var(--by-line);
  background: var(--by-glass);
  backdrop-filter: blur(6px);
  padding: 18px;
}

.page-products .pd-watch__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--by-line);
}

.page-products .pd-watch__title {
  font-size: 14px;
  color: var(--by-text);
  font-weight: 600;
}

.page-products .pd-watch__count {
  font-family: var(--by-font-mono);
  font-size: 13px;
  color: var(--by-lime);
}

.page-products .pd-watch__list {
  list-style: none;
  margin: 0;
  padding: 6px 0 0;
}

.page-products .pd-watch__item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 11px 0;
  border-bottom: 1px solid var(--by-line-soft);
  font-size: 14px;
  color: var(--by-text);
}

.page-products .pd-watch__item:last-child {
  border-bottom: none;
}

.page-products .pd-watch__name::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 10px;
  background: var(--by-lime);
  vertical-align: middle;
}

.page-products .pd-watch__meta {
  font-family: var(--by-font-mono);
  font-size: 12px;
  color: var(--by-muted);
}

.page-products .pd-watch__hint {
  margin: 12px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--by-dim);
}

/* ---------- 十分钟分布图 ---------- */
.page-products .pd-chart {
  margin-top: 22px;
  border: 1px solid var(--by-line);
  background: var(--by-panel);
  padding: 20px 16px 16px;
}

.page-products .pd-chart__scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-products .pd-chart__plot {
  display: grid;
  grid-template-columns: repeat(10, minmax(0, 1fr));
  gap: 6px;
  align-items: end;
  height: 210px;
  min-width: 460px;
}

.page-products .pd-chart__col {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 2px;
  height: 100%;
}

.page-products .pd-chart__bar {
  display: block;
  width: 40%;
  min-width: 4px;
  border-radius: 1px 1px 0 0;
  opacity: 0.82;
  transition: opacity 0.16s var(--by-ease);
}

.page-products .pd-chart__col:hover .pd-chart__bar {
  opacity: 1;
}

.page-products .pd-chart__bar--in {
  background: var(--by-lime);
  height: 20%;
}

.page-products .pd-chart__bar--out {
  background: var(--by-ember);
  height: 14%;
}

.page-products .pd-chart__col:nth-child(1) .pd-chart__bar--in { height: 34%; }
.page-products .pd-chart__col:nth-child(1) .pd-chart__bar--out { height: 22%; }
.page-products .pd-chart__col:nth-child(2) .pd-chart__bar--in { height: 52%; }
.page-products .pd-chart__col:nth-child(2) .pd-chart__bar--out { height: 30%; }
.page-products .pd-chart__col:nth-child(3) .pd-chart__bar--in { height: 41%; }
.page-products .pd-chart__col:nth-child(3) .pd-chart__bar--out { height: 28%; }
.page-products .pd-chart__col:nth-child(4) .pd-chart__bar--in { height: 63%; }
.page-products .pd-chart__col:nth-child(4) .pd-chart__bar--out { height: 41%; }
.page-products .pd-chart__col:nth-child(5) .pd-chart__bar--in { height: 38%; }
.page-products .pd-chart__col:nth-child(5) .pd-chart__bar--out { height: 33%; }
.page-products .pd-chart__col:nth-child(6) .pd-chart__bar--in { height: 66%; }
.page-products .pd-chart__col:nth-child(6) .pd-chart__bar--out { height: 45%; }
.page-products .pd-chart__col:nth-child(7) .pd-chart__bar--in { height: 47%; }
.page-products .pd-chart__col:nth-child(7) .pd-chart__bar--out { height: 26%; }
.page-products .pd-chart__col:nth-child(8) .pd-chart__bar--in { height: 72%; }
.page-products .pd-chart__col:nth-child(8) .pd-chart__bar--out { height: 38%; }
.page-products .pd-chart__col:nth-child(9) .pd-chart__bar--in { height: 55%; }
.page-products .pd-chart__col:nth-child(9) .pd-chart__bar--out { height: 31%; }
.page-products .pd-chart__col:nth-child(10) .pd-chart__bar--in { height: 68%; }
.page-products .pd-chart__col:nth-child(10) .pd-chart__bar--out { height: 44%; }

.page-products .pd-chart__axis {
  display: grid;
  grid-template-columns: repeat(10, minmax(0, 1fr));
  gap: 6px;
  min-width: 460px;
  margin-top: 10px;
  padding-top: 8px;
  border-top: 1px solid var(--by-line);
}

.page-products .pd-chart__axis span {
  font-family: var(--by-font-mono);
  font-size: 10px;
  line-height: 1.4;
  color: var(--by-dim);
  text-align: center;
  white-space: nowrap;
}

.page-products .pd-chart__legend {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 18px;
  margin: 16px 0 0;
  padding: 12px 0 0;
  border-top: 1px solid var(--by-line-soft);
  font-size: 12px;
  color: var(--by-muted);
}

.page-products .pd-chart__legend li {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.page-products .pd-chart__key {
  width: 12px;
  height: 12px;
  display: inline-block;
}

.page-products .pd-chart__key--in {
  background: var(--by-lime);
}

.page-products .pd-chart__key--out {
  background: var(--by-ember);
}

.page-products .pd-chart__legend-note {
  color: var(--by-dim);
}

/* ---------- 分布维度 ---------- */
.page-products .pd-dims {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: 20px;
}

.page-products .pd-dim {
  border-left: 2px solid var(--by-line);
  padding: 4px 0 4px 16px;
}

.page-products .pd-dim__label {
  display: block;
  font-family: var(--by-font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--by-lime);
  margin-bottom: 6px;
}

.page-products .pd-dim__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--by-muted);
}

.page-products .pd-figure {
  margin: 24px 0 0;
  border: 1px solid var(--by-line);
  background: var(--by-panel);
}

.page-products .pd-figure figcaption {
  padding: 12px 14px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--by-dim);
  border-top: 1px solid var(--by-line-soft);
}

/* ---------- 战报与清单 ---------- */
.page-products .pd-report-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: 22px;
}

.page-products .pd-report-card {
  background: var(--by-panel);
  border: 1px solid var(--by-line);
  padding: 20px;
}

.page-products .pd-report-card--accent {
  border-color: var(--by-line);
  background:
    linear-gradient(160deg, rgba(199, 255, 61, 0.08), transparent 62%),
    var(--by-panel);
}

.page-products .pd-report-card__title {
  margin: 0 0 14px;
  font-family: var(--by-font-display);
  font-size: 20px;
  line-height: 1.25;
  font-weight: 700;
  color: var(--by-text);
}

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

.page-products .pd-report-list li {
  display: flex;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--by-line-soft);
  font-size: 14px;
  line-height: 1.7;
  color: var(--by-muted);
}

.page-products .pd-report-list li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.page-products .pd-report-list__n {
  flex: none;
  font-family: var(--by-font-mono);
  font-size: 12px;
  color: var(--by-lime);
  padding-top: 3px;
  min-width: 14px;
}

.page-products .pd-report-card__btn {
  margin-top: 16px;
}

/* ---------- 使用场景 ---------- */
.page-products .pd-flows {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: 22px;
}

.page-products .pd-flow-card {
  position: relative;
  padding: 22px 20px 20px;
  background: var(--by-panel);
  border: 1px solid var(--by-line);
  border-top: 2px solid var(--by-lime);
}

.page-products .pd-flow-card__who {
  display: block;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--by-muted);
  margin-bottom: 8px;
}

.page-products .pd-flow-card__title {
  margin: 0 0 14px;
  font-family: var(--by-font-display);
  font-size: 24px;
  line-height: 1.2;
  font-weight: 700;
  color: var(--by-text);
}

.page-products .pd-flow-card__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: pdstep;
}

.page-products .pd-flow-card__steps li {
  counter-increment: pdstep;
  position: relative;
  padding: 0 0 14px 30px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--by-muted);
}

.page-products .pd-flow-card__steps li::before {
  content: counter(pdstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--by-font-mono);
  font-size: 11px;
  color: var(--by-lime);
}

.page-products .pd-flow-card__steps li:last-child {
  padding-bottom: 0;
}

/* ---------- 兼容与支持 ---------- */
.page-products .pd-compat {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  margin-top: 22px;
}

.page-products .pd-compat__figure {
  margin: 0;
  border: 1px solid var(--by-line);
  background: var(--by-panel);
  order: -1;
}

.page-products .pd-browsers {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  background: var(--by-line);
  border: 1px solid var(--by-line);
}

.page-products .pd-browser {
  background: var(--by-panel);
  padding: 13px 14px;
  font-size: 13px;
  color: var(--by-text);
}

.page-products .pd-browser::before {
  content: "";
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 9px;
  background: var(--by-lime);
  vertical-align: middle;
}

.page-products .pd-compat__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: 14px;
  background: var(--by-line);
  border: 1px solid var(--by-line);
}

.page-products .pd-mini-stat {
  background: var(--by-panel-2);
  padding: 14px 12px;
}

.page-products .pd-mini-stat__num {
  display: block;
  font-family: var(--by-font-mono);
  font-size: 24px;
  line-height: 1.1;
  font-weight: 600;
  color: var(--by-lime);
}

.page-products .pd-mini-stat__unit {
  font-size: 12px;
  color: var(--by-muted);
  margin-left: 2px;
}

.page-products .pd-mini-stat__label {
  display: block;
  margin-top: 6px;
  font-size: 11px;
  line-height: 1.5;
  color: var(--by-muted);
}

.page-products .pd-help-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-top: 22px;
}

.page-products .pd-help {
  display: block;
  padding: 16px 18px;
  background: var(--by-panel);
  border: 1px solid var(--by-line);
  text-decoration: none;
  transition: border-color 0.16s var(--by-ease), background-color 0.16s var(--by-ease);
}

.page-products .pd-help:hover,
.page-products .pd-help:focus-visible {
  border-color: var(--by-lime);
  background: var(--by-panel-2);
}

.page-products .pd-help:focus-visible {
  outline: 2px solid var(--by-focus);
  outline-offset: 2px;
}

.page-products .pd-help__label {
  display: block;
  font-family: var(--by-font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--by-lime);
  margin-bottom: 6px;
}

.page-products .pd-help__text {
  display: block;
  font-size: 13px;
  line-height: 1.7;
  color: var(--by-muted);
}

/* ---------- 结尾 CTA ---------- */
.page-products .pd-cta {
  margin-top: 40px;
  padding: 32px 24px;
  border: 1px solid var(--by-line);
  background:
    linear-gradient(120deg, rgba(199, 255, 61, 0.1), transparent 58%),
    var(--by-forest);
  position: relative;
  overflow: hidden;
}

.page-products .pd-cta::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 64px;
  height: 2px;
  background: var(--by-ember);
}

.page-products .pd-cta__title {
  margin: 0 0 10px;
  font-family: var(--by-font-display);
  font-size: clamp(24px, 4vw, 34px);
  line-height: 1.15;
  font-weight: 700;
  color: var(--by-text);
}

.page-products .pd-cta__text {
  margin: 0 0 20px;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--by-muted);
}

.page-products .pd-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 平板 ---------- */
@media (min-width: 700px) {
  .page-products .pd-cover {
    padding: 32px 0 60px;
  }

  .page-products .pd-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-products .pd-panels {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

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

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

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

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

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

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

  .page-products .pd-cta {
    padding: 40px 36px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-products .pd-cover__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 48px;
    align-items: end;
  }

  .page-products .pd-split {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    align-items: start;
    gap: 24px;
  }

  .page-products .pd-split--reverse {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  }

  .page-products .pd-compat {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-products .pd-compat__figure {
    order: 0;
  }

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

@media (min-width: 1024px) {
  .page-products .pd-body {
    grid-template-columns: var(--pd-rail-w) minmax(0, 1fr);
    gap: 56px;
    padding: 48px 0 64px;
  }

  .page-products .pd-rail {
    display: block;
    position: sticky;
    top: calc(var(--by-header-h) + 28px);
    align-self: start;
    border-top: 1px solid var(--by-line);
    padding-top: 16px;
  }

  .page-products .pd-rail__head {
    margin: 0 0 12px;
    font-family: var(--by-font-mono);
    font-size: 11px;
    letter-spacing: 0.14em;
    color: var(--by-dim);
  }

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

  .page-products .pd-rail__item {
    border-bottom: 1px solid var(--by-line-soft);
  }

  .page-products .pd-rail__link {
    display: flex;
    gap: 10px;
    align-items: baseline;
    padding: 11px 0 11px 12px;
    border-left: 2px solid transparent;
    color: var(--by-muted);
    text-decoration: none;
    font-size: 13px;
    line-height: 1.5;
    transition: color 0.16s var(--by-ease), border-color 0.16s var(--by-ease);
  }

  .page-products .pd-rail__link:hover,
  .page-products .pd-rail__link:focus-visible {
    color: var(--by-lime);
    border-left-color: var(--by-lime);
  }

  .page-products .pd-rail__link:focus-visible {
    outline: 2px solid var(--by-focus);
    outline-offset: -2px;
  }

  .page-products .pd-rail__num {
    font-family: var(--by-font-mono);
    font-size: 11px;
    color: var(--by-dim);
    flex: none;
  }

  .page-products .pd-rail__back {
    display: inline-block;
    margin-top: 18px;
    font-size: 12px;
  }

  .page-products .pd-module {
    padding: 40px 0 48px;
  }

  .page-products .pd-module:first-of-type {
    padding-top: 0;
  }
}

@media (min-width: 1240px) {
  .page-products .pd-cover__title {
    font-size: 66px;
  }

  .page-products .pd-chart {
    padding: 24px 24px 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products .pd-panel,
  .page-products .pd-tag,
  .page-products .pd-help,
  .page-products .pd-chart__bar,
  .page-products .pd-rail__link {
    transition: none;
  }

  .page-products .pd-panel:hover {
    transform: none;
  }
}
<<<END>>>