.page-products {
  --pd-rail: 236px;
  --pd-pad: clamp(0.35rem, 1.4vw, 0.75rem);
  display: block;
  background: var(--by-ink);
  color: var(--by-text);
}

.page-products .by-crumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  margin: 0;
  padding: 1.1rem 0 0.2rem;
  list-style: none;
  font-family: var(--by-font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--by-muted);
}

.page-products .by-crumbs__sep {
  margin: 0 0.35rem;
  color: var(--by-edge);
}

/* ---------- 首屏 ---------- */
.pd-hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(115% 88% at 84% 8%, rgba(61, 245, 198, 0.15), transparent 62%),
    linear-gradient(180deg, var(--by-ink) 0%, var(--by-ink-deep) 100%);
  border-bottom: 1px solid var(--by-edge);
}

.pd-hero__grid {
  display: grid;
  gap: clamp(1.6rem, 4vw, 3rem);
  padding: clamp(1.5rem, 4vw, 3.2rem) 0 clamp(1.6rem, 4vw, 3rem);
}

.pd-hero__body {
  align-self: center;
}

.pd-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 1rem;
  padding: 0.34rem 0.85rem 0.34rem 0.6rem;
  border: 1px solid var(--by-edge);
  border-radius: 999px;
  background: rgba(22, 58, 49, 0.7);
  font-family: var(--by-font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  color: var(--by-muted);
}

.pd-dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--by-live);
  box-shadow: 0 0 0 4px rgba(255, 92, 92, 0.16);
}

.page-products h1 {
  margin: 0 0 1rem;
  font-family: var(--by-font-display);
  font-size: clamp(2.1rem, 5.4vw, 3.6rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: 0.01em;
  color: var(--by-text);
}

.pd-lede {
  max-width: 34rem;
  margin: 0 0 1.5rem;
  font-size: 15px;
  line-height: 1.78;
  color: var(--by-muted);
}

.pd-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.9rem;
}

.pd-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.6rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.pd-stat {
  padding: 0.85rem 0.9rem;
  border: 1px solid var(--by-edge);
  border-radius: 12px;
  background: rgba(22, 58, 49, 0.5);
}

.pd-stat__num {
  display: block;
  font-family: var(--by-font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--by-neon);
  text-shadow: 0 0 14px rgba(61, 245, 198, 0.4);
  word-break: break-all;
}

.pd-stat__label {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.76rem;
  color: var(--by-muted);
}

.pd-hero__figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--by-edge);
  border-radius: var(--by-radius);
  background: var(--by-panel);
  box-shadow: var(--by-shadow);
}

.pd-hero__figure img {
  display: block;
  width: 100%;
  height: clamp(280px, 58vw, 520px);
  object-fit: cover;
  object-position: center top;
}

.pd-hero__figure figcaption {
  padding: 0.7rem 1rem;
  border-top: 1px solid var(--by-edge);
  font-size: 0.8rem;
  color: var(--by-muted);
}

/* ---------- 横向赛果条 ---------- */
.pd-ticker {
  overflow: hidden;
  border-top: 1px solid var(--by-edge);
  background: linear-gradient(180deg, rgba(10, 31, 26, 0.9), rgba(22, 58, 49, 0.9));
}

.pd-ticker__track {
  display: flex;
  width: max-content;
  animation: pd-marquee 46s linear infinite;
}

.pd-ticker:hover .pd-ticker__track,
.pd-ticker:focus-within .pd-ticker__track {
  animation-play-state: paused;
}

.pd-ticker__list {
  display: flex;
  align-items: center;
  gap: 2.2rem;
  margin: 0;
  padding: 0.8rem 1.1rem;
  list-style: none;
}

.pd-ticker__item {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  white-space: nowrap;
}

.pd-ticker__league {
  font-family: var(--by-font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--by-neon);
}

.pd-ticker__score {
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--by-text);
}

@keyframes pd-marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ---------- 主体骨架 ---------- */
.pd-flow {
  padding-block: clamp(2rem, 5vw, 3.6rem);
}

.pd-flow__scaffold {
  display: grid;
  gap: clamp(1.4rem, 3vw, 2.2rem);
}

.pd-rail {
  border-bottom: 1px solid var(--by-edge);
  padding-bottom: 0.65rem;
}

.pd-rail__title {
  margin: 0 0 0.6rem;
  font-family: var(--by-font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--by-muted);
}

.pd-rail__list {
  display: flex;
  gap: 0.5rem;
  margin: 0;
  padding: 0 0 0.35rem;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.pd-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.8rem;
  border: 1px solid var(--by-edge);
  border-radius: 999px;
  background: rgba(22, 58, 49, 0.6);
  color: var(--by-text);
  font-size: 0.82rem;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

.pd-rail__num {
  font-family: var(--by-font-mono);
  font-size: 0.7rem;
  color: var(--by-neon);
}

.pd-rail__link:hover,
.pd-rail__link:focus-visible {
  border-color: var(--by-neon);
  background: var(--by-neon-soft);
  transform: translateY(-1px);
}

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

/* ---------- 章节 ---------- */
.pd-section {
  padding-block: clamp(1.8rem, 4.5vw, 3rem);
  scroll-margin-top: 104px;
}

.pd-section + .pd-section {
  border-top: 1px solid var(--by-edge);
}

.pd-section__head {
  max-width: 46rem;
  margin-bottom: clamp(1.2rem, 3vw, 1.9rem);
}

.page-products .by-band__num {
  margin: 0 0 0.5rem;
  font-family: var(--by-font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  color: var(--by-neon);
}

.pd-section__title {
  margin: 0 0 0.7rem;
  font-family: var(--by-font-display);
  font-size: clamp(1.5rem, 3.4vw, 2.1rem);
  font-weight: 700;
  line-height: 1.22;
  color: var(--by-text);
}

.pd-section__lede {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--by-muted);
}

/* ---------- 首屏章节卡片 ---------- */
.pd-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.9rem;
}

.pd-card {
  padding: 1.05rem 1.15rem;
  background: linear-gradient(160deg, rgba(22, 58, 49, 0.92), rgba(15, 43, 36, 0.92));
  border: 1px solid var(--by-edge);
  border-left: 3px solid var(--by-neon);
}

.pd-card__title {
  margin: 0 0 0.45rem;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--by-text);
}

.pd-card__text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.72;
  color: var(--by-muted);
}

/* ---------- 控球率章节 ---------- */
.pd-meters {
  display: grid;
  gap: 1.2rem;
}

.pd-meters__figure {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--by-edge);
  border-radius: var(--by-radius);
  background: var(--by-panel);
}

.pd-meters__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.pd-meters__figure figcaption {
  padding: 0.7rem 1rem;
  border-top: 1px solid var(--by-edge);
  font-size: 0.8rem;
  color: var(--by-muted);
}

.pd-meters__panel {
  padding: 1.15rem;
  border: 1px solid var(--by-edge);
  border-radius: var(--by-radius);
  background: linear-gradient(200deg, rgba(10, 31, 26, 0.85), rgba(22, 58, 49, 0.75));
}

.pd-meters__label {
  margin: 0 0 0.85rem;
  font-family: var(--by-font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--by-muted);
}

.pd-meter {
  display: block;
  width: 100%;
  height: auto;
  margin-bottom: 1rem;
}

.pd-meter__goal { fill: var(--by-goal); opacity: 0.92; }
.pd-meter__concede { fill: var(--by-concede); opacity: 0.88; }

.pd-meter__val {
  font-family: var(--by-font-mono);
  font-size: 20px;
  font-weight: 700;
  fill: #0A1F1A;
}

.pd-legend {
  display: grid;
  gap: 0.45rem;
  margin: 0 0 1.1rem;
  padding: 0;
  list-style: none;
  font-size: 0.84rem;
  color: var(--by-muted);
}

.pd-legend__item {
  display: flex;
  align-items: center;
  gap: 0.55rem;
}

.pd-legend__dot {
  width: 0.6rem;
  height: 0.6rem;
  border-radius: 50%;
  flex: none;
}

.pd-legend__dot--goal { background: var(--by-goal); }
.pd-legend__dot--concede { background: var(--by-concede); }

.pd-facts {
  display: grid;
  gap: 0.55rem;
  margin: 0;
  padding-top: 0.9rem;
  border-top: 1px dashed var(--by-edge);
}

.pd-fact {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  font-size: 0.86rem;
}

.pd-fact dt {
  color: var(--by-muted);
}

.pd-fact dd {
  margin: 0;
  font-family: var(--by-font-mono);
  font-weight: 700;
  color: var(--by-neon);
}

/* ---------- 收藏章节 ---------- */
.pd-fold {
  display: grid;
  gap: 1.2rem;
}

.pd-fold__figure {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--by-edge);
  border-radius: var(--by-radius);
  background: var(--by-panel);
}

.pd-fold__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.pd-fold__figure figcaption {
  padding: 0.7rem 1rem;
  border-top: 1px solid var(--by-edge);
  font-size: 0.8rem;
  color: var(--by-muted);
}

.pd-fold__body {
  padding: 1.15rem;
  border: 1px solid var(--by-edge);
  border-radius: var(--by-radius);
  background: rgba(22, 58, 49, 0.55);
}

.pd-keys {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.6rem;
  margin: 1.1rem 0;
  padding: 0;
  list-style: none;
}

.pd-key {
  padding: 0.8rem 0.7rem;
  border-radius: 12px;
  border: 1px solid var(--by-edge);
  background: rgba(10, 31, 26, 0.6);
}

.pd-key__num {
  display: block;
  font-family: var(--by-font-mono);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--by-neon);
  text-shadow: 0 0 12px rgba(61, 245, 198, 0.35);
}

.pd-key__label {
  display: block;
  margin-top: 0.2rem;
  font-size: 0.72rem;
  line-height: 1.5;
  color: var(--by-muted);
}

.pd-inline {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.72;
  color: var(--by-muted);
}

.pd-link {
  color: var(--by-neon);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.pd-link:hover,
.pd-link:focus-visible {
  color: var(--by-text);
  outline: none;
  text-decoration-color: var(--by-goal);
}

.pd-link:focus-visible {
  outline: 2px solid var(--by-neon);
  outline-offset: 2px;
  border-radius: 3px;
}

/* ---------- 双端对比 ---------- */
.pd-compare {
  display: grid;
  gap: 0.9rem;
  margin-bottom: 1.3rem;
}

.pd-compare__col {
  padding: 1.15rem 1.2rem;
  border: 1px solid var(--by-edge);
  border-radius: var(--by-radius);
  background: rgba(22, 58, 49, 0.55);
}

.pd-compare__col--web { border-top: 3px solid var(--by-concede); }
.pd-compare__col--app { border-top: 3px solid var(--by-neon); }

.pd-compare__head {
  margin: 0 0 0.8rem;
  font-family: var(--by-font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--by-text);
}

.pd-compare__list {
  display: grid;
  gap: 0.55rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--by-muted);
}

.pd-compare__list li {
  position: relative;
  padding-left: 1rem;
}

.pd-compare__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--by-edge);
}

.pd-compare__col--web .pd-compare__list li::before { background: var(--by-concede); }
.pd-compare__col--app .pd-compare__list li::before { background: var(--by-neon); }

.pd-install__figure {
  margin-bottom: 1.3rem;
}

.page-products .by-media {
  display: block;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--by-edge);
  border-radius: var(--by-radius);
  background: var(--by-panel);
}

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

.page-products .by-media figcaption {
  padding: 0.7rem 1rem;
  border-top: 1px solid var(--by-edge);
  font-size: 0.8rem;
  color: var(--by-muted);
}

/* ---------- 安装步骤 ---------- */
.pd-steps {
  display: grid;
  gap: 0.8rem;
}

.pd-step {
  border: 1px solid var(--by-edge);
  border-radius: var(--by-radius);
  background: rgba(10, 31, 26, 0.6);
  overflow: hidden;
}

.pd-step__summary {
  padding: 0.95rem 1.1rem;
  cursor: pointer;
  font-family: var(--by-font-display);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--by-text);
  list-style: none;
}

.pd-step__summary::-webkit-details-marker { display: none; }

.pd-step__summary::after {
  content: "+";
  float: right;
  font-family: var(--by-font-mono);
  color: var(--by-neon);
}

.pd-step[open] .pd-step__summary::after { content: "−"; }

.pd-step__summary:hover,
.pd-step__summary:focus-visible {
  background: var(--by-neon-soft);
  outline: none;
}

.pd-step__summary:focus-visible {
  outline: 2px solid var(--by-neon);
  outline-offset: -2px;
}

.pd-step__list {
  margin: 0;
  padding: 0 1.1rem 1.1rem 2.4rem;
  counter-reset: pd-count;
  list-style: none;
}

.pd-step__list li {
  position: relative;
  padding: 0.42rem 0;
  font-size: 0.88rem;
  line-height: 1.72;
  color: var(--by-muted);
  border-bottom: 1px dashed rgba(31, 74, 63, 0.6);
}

.pd-step__list li:last-child { border-bottom: 0; }

.pd-step__list li::before {
  counter-increment: pd-count;
  content: counter(pd-count, decimal-leading-zero);
  position: absolute;
  left: -1.8rem;
  top: 0.42rem;
  font-family: var(--by-font-mono);
  font-size: 0.72rem;
  color: var(--by-neon);
}

/* ---------- 收尾提示 ---------- */
.pd-callout {
  margin-top: 1.3rem;
  padding: 1.2rem 1.25rem;
  border: 1px solid var(--by-edge);
  border-radius: var(--by-radius);
  background:
    radial-gradient(120% 140% at 8% 0%, rgba(61, 245, 198, 0.12), transparent 62%),
    rgba(22, 58, 49, 0.6);
}

.pd-callout__title {
  margin: 0 0 0.5rem;
  font-family: var(--by-font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--by-text);
}

.pd-callout__text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.78;
  color: var(--by-muted);
}

/* ---------- 渐入 ---------- */
.page-products [data-reveal] {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.page-products [data-reveal].is-in {
  opacity: 1;
  transform: none;
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 700px) {
  .pd-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .pd-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    align-items: center;
  }

  .pd-meters {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    align-items: stretch;
  }

  .pd-fold {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
  }

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

/* ---------- 桌面 ---------- */
@media (min-width: 960px) {
  .pd-flow__scaffold {
    grid-template-columns: var(--pd-rail) minmax(0, 1fr);
    gap: clamp(1.8rem, 3.6vw, 3.2rem);
  }

  .pd-rail {
    border-bottom: 0;
    padding-bottom: 0;
    border-right: 1px solid var(--by-edge);
    padding-right: 0.4rem;
  }

  .pd-rail__inner {
    position: sticky;
    top: 108px;
  }

  .pd-rail__list {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
  }

  .pd-rail__link {
    width: 100%;
    border-radius: 10px;
    padding: 0.55rem 0.75rem;
  }

  .pd-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
  }

  .pd-hero__figure img {
    height: clamp(360px, 34vw, 520px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .pd-ticker__track {
    animation: none;
  }

  .page-products [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .pd-rail__link {
    transition: none;
  }
}