.page-products .biz-intro {
  padding-block: clamp(1.75rem, 5vw, 3.25rem) clamp(1.5rem, 4vw, 2.5rem);
}

.page-products .biz-intro__title {
  margin: 0.75rem 0 1.5rem;
  font-family: var(--font-cjk);
  font-weight: 300;
  font-size: clamp(2.1rem, 6vw, 3.9rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--cloud);
  max-width: 20ch;
}

.page-products .biz-intro__body {
  align-items: start;
}

.page-products .biz-intro__lead {
  margin: 0;
  color: var(--cloud);
}

.page-products .biz-intro__aside {
  margin: 1.25rem 0 0;
  padding-left: 0;
  color: var(--mist);
  font-size: var(--step-14);
  line-height: 1.75;
  border-left: 1px solid var(--line);
  padding-inline-start: 1rem;
}

/* ---------- 分类带 ---------- */

.page-products .biz-band {
  position: relative;
  overflow: hidden;
  margin-block: clamp(1.5rem, 4vw, 2.5rem);
  padding-block: clamp(1.5rem, 4vw, 2.5rem) clamp(1rem, 3vw, 1.75rem);
  background: var(--ink-1);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-products .biz-band__texture {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.16;
  pointer-events: none;
}

.page-products .biz-band__head {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 1.25rem;
  margin-bottom: clamp(1rem, 3vw, 1.75rem);
}

.page-products .biz-band__title {
  font-family: var(--font-cjk);
  font-weight: 900;
  font-size: clamp(1.4rem, 3.4vw, 2rem);
  letter-spacing: -0.02em;
  color: var(--cloud);
}

.page-products .biz-band__hint {
  color: var(--gold);
}

.page-products .biz-band__viewport {
  position: relative;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
  padding: 0 var(--gutter) 0.85rem;
}

.page-products .biz-band__track {
  display: flex;
  align-items: stretch;
  gap: clamp(0.7rem, 2vw, 1.15rem);
  width: max-content;
}

.page-products .band-card {
  flex: 0 0 auto;
  width: 14rem;
  min-height: 12.5rem;
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.05rem 1rem 1.25rem;
  background: var(--ink-0);
  border: 1px solid var(--line);
  border-top: 2px solid var(--gold);
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease), background-color 0.35s var(--ease);
}

.page-products .band-card--lead {
  width: 17.5rem;
  min-height: 15rem;
  border-top-width: 3px;
  background:
    linear-gradient(158deg, rgba(201, 162, 39, 0.13), rgba(10, 11, 13, 0) 62%),
    var(--ink-0);
}

.page-products .band-card:hover,
.page-products .band-card:focus-within {
  transform: translateY(-4px);
  border-color: var(--gold);
}

.page-products .band-card__index {
  color: var(--gold);
}

.page-products .band-card__name {
  font-family: var(--font-cjk);
  font-weight: 900;
  font-size: var(--step-17);
  letter-spacing: -0.01em;
  color: var(--cloud);
}

.page-products .band-card--lead .band-card__name {
  font-size: var(--step-22);
}

.page-products .band-card__desc {
  margin: 0;
  font-size: var(--step-14);
  line-height: 1.75;
  color: var(--mist);
}

.page-products .band-card__stat {
  margin-top: auto;
  padding-top: 0.7rem;
  border-top: 1px solid var(--line);
  font-family: var(--font-latin);
  font-size: var(--step-12);
  letter-spacing: 0.1em;
  color: var(--gold-hi);
  font-variant-numeric: tabular-nums;
}

.page-products .biz-band__gauge {
  position: relative;
  height: 2px;
  background: var(--line);
  overflow: hidden;
}

.page-products .biz-band__gauge::after {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 34%;
  background: linear-gradient(90deg, var(--gold), var(--gold-hi));
}

/* ---------- 通用章节头 ---------- */

.page-products .biz-sec {
  padding-block: clamp(1.75rem, 5vw, 3.25rem);
  border-top: 1px solid var(--line);
}

.page-products .biz-sec__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.4rem 1.5rem;
  margin-bottom: clamp(1.25rem, 3vw, 2rem);
}

.page-products .biz-sec__title {
  font-family: var(--font-cjk);
  font-weight: 900;
  font-size: clamp(1.4rem, 3.2vw, 2rem);
  letter-spacing: -0.02em;
  color: var(--cloud);
}

.page-products .biz-sec__note {
  margin: 0;
  font-size: var(--step-14);
  color: var(--mist);
}

/* ---------- 资源下载 ---------- */

.page-products .biz-res__layout {
  align-items: start;
}

.page-products .biz-res__figure {
  margin: 0 0 1.5rem;
}

.page-products .res-list {
  display: grid;
  gap: 0.6rem;
  align-content: start;
}

.page-products .res-item {
  background: var(--ink-1);
  border: 1px solid var(--line);
  transition: border-color 0.3s var(--ease), background-color 0.3s var(--ease);
}

.page-products .res-item[open] {
  border-color: rgba(201, 162, 39, 0.55);
  background:
    linear-gradient(90deg, rgba(201, 162, 39, 0.07), rgba(20, 22, 27, 0) 58%),
    var(--ink-1);
}

.page-products .res-item__head {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.85rem 0.95rem;
  cursor: pointer;
  list-style: none;
}

.page-products .res-item__head::-webkit-details-marker {
  display: none;
}

.page-products .res-item__head:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: -2px;
}

.page-products .res-item__num {
  flex: 0 0 auto;
  font-family: var(--font-latin);
  font-size: var(--step-12);
  letter-spacing: 0.12em;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
}

.page-products .res-item__name {
  font-size: var(--step-17);
  font-weight: 600;
  color: var(--cloud);
  line-height: 1.5;
}

.page-products .res-item__tag {
  flex: 0 0 auto;
  margin-left: auto;
  padding: 0.2rem 0.55rem;
  background: var(--copper);
  color: var(--cloud);
  font-size: 0.815rem;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.page-products .res-item__body {
  padding: 0 0.95rem 1rem 2.5rem;
  font-size: var(--step-14);
  line-height: 1.75;
  color: var(--mist);
}

.page-products .biz-res__note {
  margin: 1.25rem 0 0;
  padding-top: 0.9rem;
  border-top: 1px solid var(--line);
  font-size: var(--step-14);
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 工具说明 ---------- */

.page-products .biz-tools__layout {
  align-items: start;
}

.page-products .biz-tools__figure {
  margin: 0 0 1.5rem;
}

.page-products .tool-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-products .tool-card {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 1rem 0.95rem 1.15rem;
  background: var(--ink-1);
  transition: background-color 0.3s var(--ease);
}

.page-products .tool-card:hover {
  background: var(--ink-0);
}

.page-products .tool-card__num {
  font-family: var(--font-latin);
  font-size: var(--step-12);
  letter-spacing: 0.12em;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
}

.page-products .tool-card__name {
  font-family: var(--font-cjk);
  font-weight: 900;
  font-size: var(--step-17);
  letter-spacing: -0.01em;
  color: var(--cloud);
}

.page-products .tool-card__desc {
  margin: 0;
  font-size: var(--step-14);
  line-height: 1.7;
  color: var(--mist);
}

.page-products .tool-card__meta {
  margin-top: auto;
  padding-top: 0.6rem;
  font-family: var(--font-latin);
  font-size: var(--step-12);
  letter-spacing: 0.08em;
  color: var(--mist);
}

/* ---------- 移动端体验 ---------- */

.page-products .biz-mobile__layout {
  align-items: start;
}

.page-products .biz-mobile__figure {
  margin: 0 0 1.5rem;
}

.page-products .biz-mobile__copy p {
  margin: 0 0 1rem;
  font-size: var(--step-17);
  line-height: 1.75;
  color: var(--cloud);
  max-width: 34em;
}

.page-products .biz-mobile__list {
  margin: 1.25rem 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-products .biz-mobile__list li {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--line);
  font-size: var(--step-14);
  color: var(--mist);
}

.page-products .biz-mobile__list .num {
  font-family: var(--font-latin);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
  color: var(--gold-hi);
  min-width: 5.5em;
}

/* ---------- 使用人群 ---------- */

.page-products .aud-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-products .aud-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.15rem 1rem 1.35rem;
  background: var(--ink-0);
}

.page-products .aud-card:nth-child(2) {
  background: var(--ink-1);
}

.page-products .aud-card__index {
  color: var(--teal-deep);
}

.page-products .aud-card__name {
  font-family: var(--font-cjk);
  font-weight: 900;
  font-size: var(--step-22);
  letter-spacing: -0.02em;
  color: var(--cloud);
}

.page-products .aud-card__desc {
  margin: 0;
  font-size: var(--step-14);
  line-height: 1.75;
  color: var(--mist);
}

.page-products .aud-card__pick {
  margin: auto 0 0;
  padding-top: 0.75rem;
  border-top: 1px solid var(--line);
  font-family: var(--font-latin);
  font-size: var(--step-12);
  letter-spacing: 0.08em;
  color: var(--gold);
}

/* ---------- 版本归档 ---------- */

.page-products .biz-archive__layout {
  align-items: start;
}

.page-products .biz-archive__copy p {
  margin: 0 0 1rem;
  font-size: var(--step-17);
  line-height: 1.75;
  color: var(--cloud);
  max-width: 34em;
}

.page-products .biz-archive__timeline {
  margin: 1.5rem 0 1rem;
  border-top: 1px solid var(--line);
}

.page-products .tl-row {
  display: grid;
  gap: 0.25rem;
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--line);
}

.page-products .tl-row__tag {
  font-family: var(--font-latin);
  font-size: var(--step-12);
  letter-spacing: 0.12em;
  color: var(--gold);
}

.page-products .tl-row__text {
  font-size: var(--step-14);
  line-height: 1.7;
  color: var(--mist);
}

.page-products .biz-archive__link {
  margin: 0;
  font-size: var(--step-14);
  line-height: 1.75;
  color: var(--mist);
}

.page-products .biz-archive__link a {
  color: var(--gold-hi);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-products .biz-archive__figure {
  margin: 1.75rem 0 0;
}

/* ---------- 流程 ---------- */

.page-products .biz-route {
  padding-block: clamp(1.75rem, 5vw, 3.25rem);
  border-top: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(78, 124, 122, 0.09), rgba(10, 11, 13, 0) 70%);
}

.page-products .route-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-products .route-step {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  padding: 1.05rem 0.95rem 1.25rem;
  background: var(--ink-1);
}

.page-products .route-step__num {
  color: var(--gold-hi);
}

.page-products .route-step__name {
  font-family: var(--font-cjk);
  font-weight: 900;
  font-size: var(--step-17);
  letter-spacing: -0.01em;
  color: var(--cloud);
}

.page-products .route-step__desc {
  margin: 0;
  font-size: var(--step-14);
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 收束 ---------- */

.page-products .biz-closing {
  padding-block: clamp(2.5rem, 8vw, 6rem) clamp(3rem, 9vw, 7rem);
}

.page-products .closing__scale {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  height: 22px;
  border-bottom: 1px solid var(--line);
}

.page-products .closing__scale span {
  display: block;
  width: 1px;
  background: var(--line);
  height: 8px;
}

.page-products .closing__scale span:nth-child(3n + 1) {
  height: 18px;
  background: var(--gold);
}

.page-products .closing__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem 2rem;
  margin-top: 1.15rem;
}

.page-products .closing__line {
  margin: 0;
  font-size: var(--step-14);
  line-height: 1.8;
  color: var(--mist);
  max-width: 46em;
}

.page-products .closing__line a {
  color: var(--gold-hi);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-products .closing__stamp {
  margin: 0;
  color: var(--gold);
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-products .band-card {
    width: 16rem;
  }

  .page-products .band-card--lead {
    width: 21rem;
    min-height: 16rem;
  }

  .page-products .tool-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-products .aud-list {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-products .aud-card:last-child {
    grid-column: 1 / -1;
  }

  .page-products .route-steps {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-products .tl-row {
    grid-template-columns: 9.5em 1fr;
    align-items: baseline;
    gap: 0 1rem;
  }
}

@media (min-width: 900px) {
  .page-products .band-card {
    width: 17.5rem;
  }

  .page-products .band-card--lead {
    width: 23rem;
    min-height: 17rem;
  }

  .page-products .biz-res__figure,
  .page-products .biz-tools__figure,
  .page-products .biz-mobile__figure {
    margin-bottom: 0;
  }

  .page-products .res-list {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.7rem 1.15rem;
  }

  .page-products .tool-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-products .aud-list {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-products .aud-card:last-child {
    grid-column: auto;
  }

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

  .page-products .biz-archive__figure {
    margin-top: 0;
  }

  .page-products .biz-archive__layout {
    align-items: start;
  }

  .page-products .biz-intro__aside {
    margin-top: 0.35rem;
  }
}

@media (min-width: 1100px) {
  .page-products .tool-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-products .band-card,
  .page-products .res-item,
  .page-products .tool-card {
    transition: none;
  }

  .page-products .band-card:hover,
  .page-products .band-card:focus-within {
    transform: none;
  }
}