.page-products {
  --pf-rule: rgba(127, 231, 255, .26);
  --pf-panel: rgba(10, 37, 64, .72);
  background: linear-gradient(180deg, var(--by-deep-sea) 0%, var(--by-tide) 48%, var(--by-ink) 100%);
  color: var(--by-sand);
  padding-bottom: clamp(50px, 7vw, 100px);
}

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

.page-products .by-crumb {
  margin-top: 18px;
}

/* ---------- 首屏 ---------- */
.page-products .pf-hero {
  position: relative;
  margin-top: 14px;
  background: var(--by-grad-panel);
  border: 2px solid var(--pf-rule);
  border-radius: var(--by-radius-l);
  box-shadow: var(--by-shadow-card);
  overflow: hidden;
}

.page-products .pf-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--by-grad-wake);
  pointer-events: none;
}

.page-products .pf-hero__inner {
  position: relative;
  display: grid;
  gap: clamp(22px, 3vw, 44px);
  padding-top: clamp(26px, 4.4vw, 62px);
  padding-bottom: clamp(26px, 4.4vw, 62px);
}

.page-products .pf-hero__eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-family: var(--by-font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--by-electric-soft);
}

.page-products .pf-dot {
  flex: none;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--by-electric);
  box-shadow: 0 0 0 5px rgba(0, 212, 255, .16);
}

.page-products .pf-hero h1 {
  margin: 16px 0 0;
  font-family: var(--by-font-head);
  font-size: clamp(29px, 5.4vw, 56px);
  line-height: 1.14;
  letter-spacing: .02em;
  color: var(--by-sand);
}

.page-products .pf-hero__lede {
  max-width: 44ch;
  margin: 18px 0 0;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--by-pearl);
}

.page-products .pf-hero__points {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(104px, 1fr));
  gap: 14px;
  margin: 24px 0 0;
  padding: 20px 0 0;
  list-style: none;
  border-top: 1px solid var(--pf-rule);
}

.page-products .pf-hero__points li {
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 0;
}

.page-products .pf-hero__points strong {
  font-family: var(--by-font-mono);
  font-size: clamp(19px, 2.4vw, 24px);
  color: var(--by-electric);
  line-height: 1.1;
}

.page-products .pf-hero__points span {
  font-size: 13px;
  line-height: 1.5;
  color: var(--by-pearl);
}

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

.page-products .pf-hero__figure {
  margin: 0;
}

.page-products .pf-hero__figure img {
  width: 100%;
  border: 2px solid var(--by-line-strong);
  border-radius: var(--by-radius-m);
  box-shadow: 8px 8px 0 rgba(7, 19, 31, .55);
  object-fit: cover;
}

/* ---------- 主布局与左索引栏 ---------- */
.page-products .pf-layout {
  display: grid;
  gap: 30px;
  margin-top: clamp(34px, 5vw, 70px);
}

.page-products .pf-rail {
  border: 2px solid var(--pf-rule);
  border-radius: var(--by-radius-m);
  background: var(--pf-panel);
  padding: 16px;
  min-width: 0;
}

.page-products .pf-rail__title {
  margin: 0 0 12px;
  font-family: var(--by-font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--by-electric);
}

.page-products .pf-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-products .pf-rail__link {
  display: block;
  padding: 8px 12px;
  border: 1px solid var(--pf-rule);
  border-radius: 999px;
  font-size: 13.5px;
  white-space: nowrap;
  color: var(--by-pearl);
  text-decoration: none;
  transition: color .2s ease, border-color .2s ease, background-color .2s ease;
}

.page-products .pf-rail__link:hover,
.page-products .pf-rail__link:focus-visible {
  color: var(--by-electric);
  border-color: var(--by-line-strong);
  background: rgba(0, 212, 255, .1);
  outline: none;
}

.page-products .pf-rail__badge {
  display: none;
  margin: 18px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--pf-rule);
  font-size: 13px;
  color: var(--by-pearl);
}

.page-products .pf-rail__badge .by-mono {
  color: var(--by-coral);
  margin-right: 6px;
}

.page-products .pf-flow {
  display: grid;
  gap: clamp(48px, 7vw, 88px);
  min-width: 0;
}

/* ---------- 章节通用 ---------- */
.page-products .pf-section {
  min-width: 0;
  scroll-margin-top: calc(var(--by-header-h) + 22px);
}

.page-products .pf-head h2,
.page-products .pf-next h2 {
  margin: 10px 0 0;
  font-family: var(--by-font-head);
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.2;
  letter-spacing: .015em;
  color: var(--by-electric-soft);
}

.page-products .pf-lede,
.page-products .pf-next__lede {
  max-width: 60ch;
  margin: 14px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--by-pearl);
}

/* ---------- 卡片矩阵 ---------- */
.page-products .pf-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(238px, 1fr));
  gap: 18px;
  margin-top: clamp(24px, 3vw, 38px);
}

.page-products .pf-tile {
  padding: 22px 20px 20px;
  background: var(--pf-panel);
  border: 2px solid var(--pf-rule);
  border-left: 4px solid var(--by-electric);
  border-radius: var(--by-radius-m);
  box-shadow: 8px 8px 0 rgba(7, 19, 31, .5);
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}

.page-products .pf-tile:hover {
  transform: translateY(-4px);
  box-shadow: var(--by-shadow-card-hover);
  border-color: var(--by-line-strong);
}

.page-products .pf-tile__idx {
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--by-coral);
}

.page-products .pf-tile h3 {
  margin: 10px 0 8px;
  font-family: var(--by-font-head);
  font-size: 19px;
  line-height: 1.35;
  color: var(--by-sand);
}

.page-products .pf-tile p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--by-pearl);
}

/* ---------- 图文分栏 ---------- */
.page-products .pf-split {
  display: grid;
  gap: 24px;
  margin-top: clamp(24px, 3vw, 38px);
}

.page-products .pf-figure {
  margin: 0;
  min-width: 0;
}

.page-products .pf-figure img {
  width: 100%;
  border: 2px solid var(--pf-rule);
  border-radius: var(--by-radius-m);
  box-shadow: 8px 8px 0 rgba(7, 19, 31, .5);
  object-fit: cover;
}

.page-products .pf-figure figcaption {
  margin-top: 12px;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--by-pearl);
  padding-left: 12px;
  border-left: 2px solid var(--by-electric);
}

.page-products .pf-figure--wide {
  margin-top: clamp(24px, 3vw, 36px);
}

/* ---------- 可展开内容组 ---------- */
.page-products .pf-folds {
  display: grid;
  gap: 12px;
  min-width: 0;
}

.page-products .pf-fold {
  border: 2px solid var(--pf-rule);
  border-radius: var(--by-radius-m);
  background: var(--pf-panel);
  overflow: hidden;
}

.page-products .pf-fold__sum {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-family: var(--by-font-head);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.4;
  color: var(--by-sand);
}

.page-products .pf-fold__sum::-webkit-details-marker {
  display: none;
}

.page-products .pf-fold__sum:focus-visible {
  outline: 2px solid var(--by-electric);
  outline-offset: -2px;
}

.page-products .pf-fold__mark {
  position: relative;
  flex: none;
  width: 20px;
  height: 20px;
  margin-left: auto;
  transition: transform .25s ease;
}

.page-products .pf-fold__mark::before,
.page-products .pf-fold__mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--by-electric);
  transform: translate(-50%, -50%);
}

.page-products .pf-fold__mark::before {
  width: 14px;
  height: 2px;
}

.page-products .pf-fold__mark::after {
  width: 2px;
  height: 14px;
}

.page-products .pf-fold[open] .pf-fold__mark {
  transform: rotate(45deg);
}

.page-products .pf-fold__body {
  padding: 14px 18px 18px;
  border-top: 1px solid rgba(127, 231, 255, .16);
  font-size: 15px;
  line-height: 1.75;
  color: var(--by-pearl);
}

.page-products .pf-fold__body p {
  margin: 0 0 10px;
}

.page-products .pf-fold__body p:last-child {
  margin-bottom: 0;
}

/* ---------- 步骤 ---------- */
.page-products .pf-steps {
  counter-reset: pfstep;
  display: grid;
  gap: 12px;
  margin: clamp(24px, 3vw, 36px) 0 0;
  padding: 0;
  list-style: none;
}

.page-products .pf-step {
  position: relative;
  padding: 18px 20px 18px 66px;
  border: 2px solid var(--pf-rule);
  border-radius: var(--by-radius-m);
  background: linear-gradient(96deg, rgba(0, 212, 255, .12), rgba(0, 212, 255, 0) 74%);
}

.page-products .pf-step::before {
  counter-increment: pfstep;
  content: counter(pfstep, decimal-leading-zero);
  position: absolute;
  left: 20px;
  top: 17px;
  font-family: var(--by-font-mono);
  font-size: 22px;
  line-height: 1;
  color: var(--by-electric);
}

.page-products .pf-step h3 {
  margin: 0 0 6px;
  font-family: var(--by-font-head);
  font-size: 17px;
  color: var(--by-sand);
}

.page-products .pf-step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--by-pearl);
}

/* ---------- 数字块与筛选标签 ---------- */
.page-products .pf-nums {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(148px, 1fr));
  gap: 14px;
  margin-top: clamp(24px, 3vw, 36px);
}

.page-products .pf-num {
  padding: 20px 18px;
  border: 2px solid var(--by-line-strong);
  border-radius: var(--by-radius-m);
  background: var(--by-ink);
}

.page-products .pf-num__v {
  display: block;
  font-family: var(--by-font-mono);
  font-size: clamp(30px, 5vw, 46px);
  line-height: 1;
  color: var(--by-electric);
}

.page-products .pf-num--coral .pf-num__v {
  color: var(--by-coral);
}

.page-products .pf-num__unit {
  margin-left: 6px;
  font-size: 15px;
  color: var(--by-pearl);
}

.page-products .pf-num__l {
  display: block;
  margin-top: 10px;
  font-size: 14px;
  color: var(--by-pearl);
}

.page-products .pf-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

/* ---------- 检索演示 ---------- */
.page-products .pf-demo {
  margin-top: clamp(24px, 3vw, 36px);
  padding: clamp(18px, 3vw, 30px);
  border: 2px solid var(--by-line-strong);
  border-radius: var(--by-radius-l);
  background: var(--by-grad-panel);
  box-shadow: var(--by-shadow-card);
}

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

.page-products .pf-field {
  padding: 12px 14px;
  border: 2px dashed var(--pf-rule);
  border-radius: var(--by-radius-s);
  background: rgba(7, 19, 31, .5);
}

.page-products .pf-field__label {
  display: block;
  font-family: var(--by-font-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--by-electric-soft);
}

.page-products .pf-field__val {
  display: block;
  margin-top: 6px;
  font-family: var(--by-font-mono);
  font-size: 16px;
  color: var(--by-sand);
}

.page-products .pf-rank {
  display: grid;
  gap: 10px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-products .pf-rank__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px 14px;
  padding: 14px 16px;
  border-left: 3px solid var(--by-electric);
  border-radius: var(--by-radius-s);
  background: rgba(0, 212, 255, .07);
}

.page-products .pf-rank__lv {
  align-self: center;
  font-family: var(--by-font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--by-coral);
  white-space: nowrap;
}

.page-products .pf-rank__item strong {
  font-size: 16px;
  color: var(--by-sand);
}

.page-products .pf-rank__item p {
  grid-column: 1 / -1;
  margin: 0;
  font-size: 14.5px;
  line-height: 1.68;
  color: var(--by-pearl);
}

/* ---------- 换机迁移 ---------- */
.page-products .pf-mig__facts {
  display: grid;
  gap: 10px;
  margin: 0;
}

.page-products .pf-mig__row {
  display: grid;
  grid-template-columns: minmax(0, 88px) minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding: 12px 14px;
  border: 2px solid var(--pf-rule);
  border-radius: var(--by-radius-s);
  background: var(--pf-panel);
}

.page-products .pf-mig__row dt {
  font-family: var(--by-font-mono);
  font-size: 12.5px;
  color: var(--by-electric-soft);
}

.page-products .pf-mig__row dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--by-sand);
}

.page-products .pf-mig__note {
  margin: 18px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--by-pearl);
}

.page-products .pf-mig__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

/* ---------- 下一步 ---------- */
.page-products .pf-next {
  padding: clamp(22px, 3.4vw, 40px);
  border: 2px solid var(--by-line-strong);
  border-radius: var(--by-radius-l);
  background: var(--pf-panel);
  box-shadow: var(--by-shadow-card);
  scroll-margin-top: calc(var(--by-header-h) + 22px);
}

.page-products .pf-next__links {
  display: grid;
  gap: 14px;
  margin-top: 24px;
}

.page-products .pf-next__link {
  display: block;
  padding: 18px;
  border: 2px solid var(--pf-rule);
  border-radius: var(--by-radius-m);
  background: rgba(7, 19, 31, .45);
  text-decoration: none;
  transition: transform .22s ease, border-color .22s ease, background-color .22s ease;
}

.page-products .pf-next__link:hover,
.page-products .pf-next__link:focus-visible {
  transform: translateY(-4px);
  border-color: var(--by-electric);
  background: rgba(0, 212, 255, .09);
  outline: none;
}

.page-products .pf-next__link strong {
  display: block;
  font-family: var(--by-font-head);
  font-size: 18px;
  color: var(--by-sand);
}

.page-products .pf-next__link span {
  display: block;
  margin-top: 8px;
  font-size: 14.5px;
  line-height: 1.68;
  color: var(--by-pearl);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-products .pf-demo__fields {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 720px) {
  .page-products .pf-next__links {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 880px) {
  .page-products .pf-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-products .pf-split--rev .pf-figure {
    order: 2;
  }

  .page-products .pf-split--rev .pf-mig {
    order: 1;
  }

  .page-products .pf-figure--wide {
    max-width: 780px;
  }
}

@media (min-width: 960px) {
  .page-products .pf-hero__inner {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, .96fr);
    align-items: center;
  }

  .page-products .pf-hero__figure {
    order: 2;
  }

  .page-products .pf-hero__copy {
    order: 1;
  }
}

@media (min-width: 1000px) {
  .page-products .pf-layout {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 60px);
  }

  .page-products .pf-rail {
    position: sticky;
    top: calc(var(--by-header-h) + 22px);
    align-self: start;
  }

  .page-products .pf-rail__list {
    flex-direction: column;
    gap: 6px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-products .pf-rail__link {
    border-radius: var(--by-radius-s);
    border-color: transparent;
    border-left: 2px solid var(--pf-rule);
    white-space: normal;
  }

  .page-products .pf-rail__badge {
    display: block;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products .pf-tile,
  .page-products .pf-fold__mark,
  .page-products .pf-next__link,
  .page-products .pf-rail__link {
    transition: none;
  }

  .page-products .pf-tile:hover,
  .page-products .pf-next__link:hover {
    transform: none;
  }
}