.page-products {
  --pp-num-size: clamp(2.5rem, 8vw, 5.5rem);
  --pp-section-gap: clamp(3rem, 7vw, 6rem);
  --pp-pad: clamp(1.25rem, 4vw, 2.5rem);
  background: var(--color-paper);
}

/* ========== 页面首屏 ========== */
.page-products .pp-hero {
  background: var(--color-ink);
  color: var(--color-paper);
  padding: var(--pp-pad) 0 3rem;
  border-bottom: 2px solid var(--color-paper);
}

.page-products .pp-hero .breadcrumb__link,
.page-products .pp-hero .breadcrumb__current {
  color: rgba(255, 255, 255, 0.72);
}

.page-products .pp-hero .breadcrumb__sep {
  color: rgba(255, 255, 255, 0.3);
}

.page-products .pp-hero__inner {
  display: grid;
  gap: 2.5rem;
  padding-top: 2.5rem;
}

.page-products .pp-hero__kicker {
  font-family: var(--font-index);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.6);
  margin: 0 0 0.75rem;
}

.page-products .pp-hero__title {
  margin: 0 0 1.25rem;
  font-family: var(--font-headline);
  font-weight: 900;
  font-size: clamp(3rem, 12vw, 6rem);
  line-height: 0.95;
  letter-spacing: -0.01em;
}

.page-products .pp-hero__lead {
  max-width: 46ch;
  font-size: 1rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.85);
  margin: 0;
}

.page-products .pp-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

.page-products .pp-hero .btn--ghost {
  border-color: var(--color-paper);
  color: var(--color-paper);
  box-shadow: 4px 4px 0 rgba(255, 255, 255, 0.35);
  background: transparent;
}

.page-products .pp-hero .btn--ghost:hover,
.page-products .pp-hero .btn--ghost:focus {
  background: var(--color-paper);
  color: var(--color-ink);
}

.page-products .pp-hero__meta {
  border: 2px solid rgba(255, 255, 255, 0.35);
  background: rgba(255, 255, 255, 0.04);
  align-self: end;
}

.page-products .pp-hero__meta-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin: 0;
  padding: 0;
}

.page-products .pp-hero__meta-item {
  padding: 1rem 1.25rem;
  border-right: 1px solid rgba(255, 255, 255, 0.2);
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.page-products .pp-hero__meta-item:nth-child(2n) {
  border-right: 0;
}

.page-products .pp-hero__meta-item:nth-last-child(-n + 2) {
  border-bottom: 0;
}

.page-products .pp-hero__label {
  margin: 0 0 0.25rem;
  font-family: var(--font-index);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.55);
}

.page-products .pp-hero__value {
  margin: 0;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-paper);
}

/* ========== 章节基础 ========== */
.page-products .pp-section {
  padding: var(--pp-section-gap) 0;
}

.page-products .pp-section--features {
  border-bottom: 2px solid var(--color-ink);
}

.page-products .section-head {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  margin-bottom: 2.5rem;
}

.page-products .section-no {
  flex: 0 0 auto;
  font-family: var(--font-headline);
  font-size: 1.25rem;
  font-weight: 900;
  line-height: 1;
  padding: 0.35rem 0.8rem;
  border: 2px solid var(--color-ink);
  background: var(--color-paper);
}

.page-products .section-title {
  font-family: var(--font-headline);
  font-size: clamp(1.75rem, 4vw, 3rem);
  line-height: 1.05;
  margin: 0 0 0.25rem;
}

.page-products .section-meta {
  font-family: var(--font-index);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--color-gray-500);
  margin: 0;
}

/* ========== 01 核心功能 ========== */
.page-products .pp-features__grid {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.page-products .pp-device {
  order: 2;
  max-width: 340px;
  width: 100%;
  margin: 0 auto;
}

.page-products .pp-device__frame {
  position: relative;
  border: 4px solid var(--color-ink);
  box-shadow: 10px 10px 0 var(--color-ink);
  background: var(--color-gray-100);
}

.page-products .pp-device__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 4 / 7;
}

.page-products .pp-device__shade {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(0, 0, 0, 0.06) 1px, transparent 1px), linear-gradient(90deg, rgba(0, 0, 0, 0.06) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
}

.page-products .pp-feature-grid {
  order: 1;
  display: grid;
  gap: 1.5rem;
}

.page-products .pp-feature-card {
  display: flex;
  flex-direction: column;
  border: 2px solid var(--color-ink);
  background: var(--color-paper);
  padding: 1.5rem 1.5rem 1.25rem;
  box-shadow: 6px 6px 0 var(--color-ink);
  min-height: 230px;
  transition: transform var(--trans-fast), box-shadow var(--trans-fast);
}

.page-products .pp-feature-card:hover {
  transform: translate(-2px, -2px);
  box-shadow: 10px 10px 0 var(--color-ink);
}

.page-products .pp-feature-card__tag {
  align-self: flex-start;
  font-family: var(--font-index);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.25rem 0.6rem;
  border: 1px solid var(--color-ink);
  background: var(--color-gray-100);
}

.page-products .pp-feature-card__title {
  font-family: var(--font-headline);
  font-size: 1.5rem;
  font-weight: 900;
  line-height: 1.2;
  margin: 1rem 0 0.5rem;
}

.page-products .pp-feature-card__desc {
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--color-gray-700);
  margin: 0;
}

.page-products .pp-feature-card__metric {
  margin: 1.25rem 0 0;
  font-family: var(--font-headline);
  font-size: 2rem;
  font-weight: 900;
  line-height: 1;
}

.page-products .pp-feature-card__detail {
  margin-top: 0.6rem;
  font-size: 0.85rem;
  color: var(--color-gray-700);
}

.page-products .pp-feature-card__detail summary {
  cursor: pointer;
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.page-products .pp-features__icon {
  order: 3;
  align-self: center;
  max-width: 220px;
  width: 100%;
  border: 2px solid var(--color-ink);
  box-shadow: 6px 6px 0 var(--color-ink);
  background: var(--color-gray-100);
}

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

/* ========== 02 下载与获取 ========== */
.page-products .pp-section--download {
  background: var(--color-ink);
  border-bottom: 4px solid var(--color-paper);
}

.page-products .pp-download__panel {
  display: grid;
  gap: 2rem;
  background: var(--color-ink);
  color: var(--color-paper);
  border: 2px solid var(--color-paper);
  box-shadow: 8px 8px 0 rgba(255, 255, 255, 0.35);
  padding: var(--pp-pad);
}

.page-products .pp-section--download .section-no {
  border-color: var(--color-paper);
  background: transparent;
  color: var(--color-paper);
}

.page-products .pp-section--download .section-title {
  color: var(--color-paper);
}

.page-products .pp-section--download .section-meta {
  color: rgba(255, 255, 255, 0.65);
}

.page-products .pp-download__text {
  max-width: 56ch;
  font-size: 1rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.9);
  margin: 1.75rem 0 0;
}

.page-products .pp-download__list {
  margin: 1.5rem 0;
  padding: 0;
  list-style: none;
}

.page-products .pp-download__list li {
  position: relative;
  padding-left: 1.4rem;
  margin-bottom: 0.5rem;
  color: rgba(255, 255, 255, 0.9);
}

.page-products .pp-download__list li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--color-paper);
}

.page-products .pp-download__cta-row {
  margin: 0 0 1rem;
}

.page-products .pp-download__store-btn {
  display: inline-block;
  background: var(--color-accent);
  color: var(--color-ink);
  border: 2px solid var(--color-paper);
  padding: 0.9rem 1.4rem;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 1rem;
  text-align: center;
  box-shadow: 6px 6px 0 rgba(255, 255, 255, 0.35);
}

.page-products .pp-download__helper {
  font-size: 0.85rem;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.65);
}

.page-products .pp-download__helper a {
  color: var(--color-paper);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-products .pp-download__visual {
  align-self: center;
}

.page-products .pp-download__img {
  display: block;
  width: 100%;
  max-width: 220px;
  height: auto;
  margin: 0 auto;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-radius: 50%;
  padding: 1.5rem;
  object-fit: contain;
  background: rgba(255, 255, 255, 0.08);
}

/* ========== 03 数据库与数据服务 ========== */
.page-products .pp-data__visual {
  border: 2px solid var(--color-ink);
  box-shadow: 8px 8px 0 var(--color-ink);
  background: var(--color-gray-100);
}

.page-products .pp-data__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-products .pp-data__intro {
  max-width: 70ch;
  margin: 2.5rem 0 0;
  font-size: 1.05rem;
  line-height: 1.8;
}

.page-products .pp-data__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border: 2px solid var(--color-ink);
  margin-top: 2rem;
}

.page-products .pp-data-stat {
  padding: 1.25rem;
  border-right: 1px solid var(--color-gray-300);
  border-bottom: 1px solid var(--color-gray-300);
  background: var(--color-paper);
}

.page-products .pp-data-stat:nth-child(2n) {
  border-right: 0;
}

.page-products .pp-data-stat:nth-last-child(-n + 2) {
  border-bottom: 0;
}

.page-products .pp-data-stat__num {
  display: block;
  font-family: var(--font-headline);
  font-size: var(--pp-num-size);
  font-weight: 900;
  line-height: 1;
  margin-bottom: 0.35rem;
}

.page-products .pp-data-stat__label {
  font-family: var(--font-index);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-gray-700);
}

.page-products .pp-data__bottom {
  display: grid;
  gap: 2rem;
  margin-top: 2.5rem;
}

.page-products .pp-data__table-wrap {
  border: 2px solid var(--color-ink);
  overflow-x: auto;
}

.page-products .pp-data-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-paper);
}

.page-products .pp-data-table__caption {
  text-align: left;
  font-family: var(--font-index);
  font-weight: 600;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.75rem 1rem;
  background: var(--color-ink);
  color: var(--color-paper);
}

.page-products .pp-data-table th,
.page-products .pp-data-table td {
  padding: 0.85rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--color-gray-300);
}

.page-products .pp-data-table th {
  font-family: var(--font-index);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--color-gray-500);
  background: var(--color-gray-100);
}

.page-products .pp-data-table td:last-child {
  font-variant-numeric: tabular-nums;
}

.page-products .pp-data-table tbody tr:last-child td {
  border-bottom: 0;
}

.page-products .pp-data__aside {
  border: 2px solid var(--color-ink);
  padding: 1.5rem;
  background: var(--color-ink);
  color: var(--color-paper);
  box-shadow: 6px 6px 0 var(--color-ink);
}

.page-products .pp-data__aside-title {
  margin: 0 0 0.5rem;
  font-family: var(--font-headline);
  font-size: 1.5rem;
  font-weight: 900;
}

.page-products .pp-data__aside-text {
  font-size: 0.9rem;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.8);
  margin: 0 0 1.5rem;
}

.page-products .pp-data__aside .btn--ghost {
  border-color: var(--color-paper);
  color: var(--color-paper);
  box-shadow: 4px 4px 0 rgba(255, 255, 255, 0.3);
  background: transparent;
}

.page-products .pp-data__aside .btn--ghost:hover,
.page-products .pp-data__aside .btn--ghost:focus {
  background: var(--color-paper);
  color: var(--color-ink);
}

/* ========== 04 版本信息 ========== */
.page-products .pp-version__stage {
  position: relative;
  overflow: hidden;
  border: 2px solid var(--color-ink);
  background: var(--color-ink-soft);
  color: var(--color-paper);
  padding: var(--pp-pad);
  box-shadow: 8px 8px 0 var(--color-ink);
}

.page-products .pp-version__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.25;
}

.page-products .pp-version__content {
  position: relative;
  z-index: 1;
}

.page-products .pp-version__intro {
  max-width: 60ch;
  font-size: 1rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.85);
  margin: 0 0 1.5rem;
}

.page-products .pp-version__track {
  display: flex;
  gap: 1rem;
  overflow-x: auto;
  padding-bottom: 0.75rem;
  scroll-snap-type: x mandatory;
}

.page-products .pp-version-card {
  flex: 0 0 240px;
  scroll-snap-align: start;
  border: 2px solid var(--color-ink);
  background: var(--color-paper);
  color: var(--color-text);
  padding: 1.25rem;
  box-shadow: 4px 4px 0 rgba(255, 255, 255, 0.35);
}

.page-products .pp-version-card__year {
  display: inline-block;
  font-family: var(--font-index);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: var(--color-gray-100);
  border: 1px solid var(--color-gray-300);
  padding: 0.25rem 0.5rem;
}

.page-products .pp-version-card__ver {
  font-family: var(--font-headline);
  font-size: 2rem;
  font-weight: 900;
  margin: 0.75rem 0 0.25rem;
  text-transform: uppercase;
}

.page-products .pp-version-card__text {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--color-gray-700);
  margin: 0;
}

.page-products .pp-version-card--current {
  background: var(--color-paper);
  outline: 4px solid var(--color-ink);
  outline-offset: -6px;
}

.page-products .pp-version__footnote {
  margin: 2rem 0 0;
  font-size: 0.85rem;
  color: var(--color-gray-500);
}

.page-products .pp-version__footnote a {
  color: var(--color-ink);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ========== 桌面布局 ========== */
@media (min-width: 640px) {
  .page-products .pp-feature-grid {
    grid-template-columns: 1fr 1fr;
  }

  .page-products .pp-data__stats {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-products .pp-data-stat:nth-child(2n) {
    border-right: 1px solid var(--color-gray-300);
  }

  .page-products .pp-data-stat:last-child {
    border-right: 0;
  }
}

@media (min-width: 920px) {
  .page-products .pp-hero__inner {
    grid-template-columns: 1fr minmax(280px, 360px);
    align-items: end;
  }

  .page-products .pp-features__grid {
    display: grid;
    grid-template-columns: minmax(260px, 320px) 1fr 120px;
    align-items: start;
    gap: 2rem;
  }

  .page-products .pp-device {
    order: 1;
    grid-column: 1;
    max-width: none;
    margin: 0;
  }

  .page-products .pp-feature-grid {
    order: 2;
    grid-column: 2;
    padding-bottom: 1.5rem;
  }

  .page-products .pp-features__icon {
    order: 3;
    grid-column: 3;
    align-self: stretch;
    max-width: none;
  }

  .page-products .pp-features__icon-img {
    height: 100%;
  }

  .page-products .pp-feature-card:nth-child(even) {
    transform: translateY(1.5rem);
  }

  .page-products .pp-download__panel {
    grid-template-columns: 1fr 0.6fr;
    align-items: center;
    padding: 3rem;
  }

  .page-products .pp-download__visual {
    order: 2;
  }

  .page-products .pp-data__bottom {
    grid-template-columns: 1fr 280px;
    align-items: start;
  }

  .page-products .pp-version__stage {
    padding: 3rem;
  }

  .page-products .pp-version-card {
    flex-basis: 260px;
  }
}