.page-platform {
  --pp-narrow: 5fr;
  --pp-wide: 7fr;
}

/* ---------- 首屏：错位色块 + 展示级标题 ---------- */

.page-platform .platform-hero {
  position: relative;
  overflow: hidden;
  padding-block: var(--space-6) var(--space-8);
  background:
    radial-gradient(120% 92% at 90% 2%,
      color-mix(in srgb, var(--color-highlight) 90%, transparent) 0%,
      color-mix(in srgb, var(--color-highlight) 0%, transparent) 58%),
    linear-gradient(168deg,
      var(--color-primary-soft) 0%,
      var(--color-surface-alt) 54%,
      var(--color-surface) 100%);
  border-end-start-radius: var(--radius-lg);
  border-end-end-radius: var(--radius-lg);
}

.page-platform .platform-hero::before {
  content: "";
  position: absolute;
  inset-inline-end: -6%;
  inset-block-start: 12%;
  width: min(52%, 460px);
  aspect-ratio: 1 / 1;
  border-radius: var(--radius-lg);
  background: color-mix(in srgb, var(--color-primary) 10%, transparent);
  transform: rotate(9deg);
  pointer-events: none;
}

.page-platform .platform-hero .breadcrumb {
  position: relative;
  z-index: 1;
}

.page-platform .platform-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: var(--space-6);
  margin-block-start: var(--space-3);
}

.page-platform .platform-hero__lead .display-title {
  font-size: var(--text-display);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  margin-block: var(--space-2) var(--space-3);
}

.page-platform .platform-hero__lead .lead {
  max-width: 44ch;
  color: var(--color-ink-soft);
}

.page-platform .platform-hero__cta {
  margin-block-start: var(--space-3);
}

.page-platform .platform-hero__figures {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-2);
  align-self: start;
}

.page-platform .figure-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: var(--space-2) var(--space-2);
  background: var(--color-surface);
  box-shadow: var(--shadow-1);
}

.page-platform .figure-item--a {
  border-radius: var(--radius-lg);
  border-block-start: 4px solid var(--color-primary);
}

.page-platform .figure-item--b {
  border-radius: var(--radius-sm);
  background: var(--color-highlight);
}

.page-platform .figure-item--c {
  border-radius: var(--radius-md);
  background: var(--color-surface-deep);
}

.page-platform .figure-item .figure {
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  line-height: 1;
  color: var(--color-accent);
  font-weight: var(--weight-heading);
}

.page-platform .figure-item--b .figure {
  color: var(--color-primary);
}

.page-platform .figure-item .figure__unit {
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  line-height: 1.35;
}

.page-platform .platform-hero__services {
  position: relative;
  z-index: 1;
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.page-platform .platform-hero__service {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xl);
  line-height: 1.1;
  color: var(--color-primary);
  background: var(--color-surface);
  border-radius: var(--radius-pill);
  padding: 10px var(--space-3);
  box-shadow: var(--shadow-1);
}

.page-platform .platform-hero__service:nth-child(2n) {
  background: var(--color-highlight);
  color: var(--color-ink);
  border-radius: var(--radius-md);
}

.page-platform .platform-hero__service:nth-child(3n) {
  background: var(--color-surface-deep);
  color: var(--color-ink);
}

.page-platform .platform-hero__media {
  position: relative;
  z-index: 1;
  margin: var(--space-6) 0 0;
}

.page-platform .media {
  margin: 0;
  position: relative;
  display: block;
}

.page-platform .media__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-1);
}

.page-platform .platform-hero__media .media__img {
  border-radius: var(--radius-lg);
}

/* ---------- 五项业务：错位陈列 ---------- */

.page-platform .platform-biz__head {
  max-width: var(--measure);
}

.page-platform .platform-biz__intro {
  margin-block-start: var(--space-2);
  color: var(--color-ink-soft);
}

.page-platform .biz-list {
  margin-block-start: var(--space-6);
}

.page-platform .biz {
  display: grid;
  gap: var(--space-4);
  padding-block: var(--space-6);
  border-block-start: var(--border-thin) solid var(--color-line);
  transition: transform 200ms ease;
}

.page-platform .biz:first-child {
  border-block-start: 0;
  padding-block-start: 0;
}

.page-platform .biz__kicker {
  font-size: var(--text-sm);
  color: var(--color-accent);
  margin: 0 0 var(--space-1);
  letter-spacing: 0.01em;
}

.page-platform .biz__title {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-2xl);
  line-height: var(--leading-heading);
  color: var(--color-ink);
  margin: 0 0 var(--space-2);
}

.page-platform .biz__lede {
  color: var(--color-ink-soft);
  max-width: 52ch;
  margin: 0 0 var(--space-3);
}

.page-platform .biz__facts {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-platform .biz__facts li {
  display: grid;
  gap: 2px;
  padding-block: var(--space-2);
  border-block-start: var(--border-thin) solid var(--color-line);
}

.page-platform .biz__facts li:first-child {
  border-block-start: 0;
  padding-block-start: 0;
}

.page-platform .biz__fact-key {
  font-size: var(--text-sm);
  color: var(--color-primary);
  font-weight: var(--weight-heading);
}

.page-platform .biz__fact-val {
  color: var(--color-ink);
}

.page-platform .biz__fact-val a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-platform .biz__figure {
  margin: 0;
}

.page-platform .biz__figure .media__img {
  border-radius: var(--radius-sm);
}

.page-platform .biz--three .biz__figure .media__img {
  border-radius: var(--radius-lg);
}

/* 业务视觉块，三种不同底色与圆角 */

.page-platform .biz__visual {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-4);
  transition: transform 200ms ease, box-shadow 200ms ease;
}

.page-platform .biz__visual--plate {
  background: var(--color-surface-deep);
  border-radius: var(--radius-lg);
  justify-content: center;
}

.page-platform .biz__visual-label {
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.page-platform .biz__visual-num {
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  line-height: 1;
  color: var(--color-primary);
  font-weight: var(--weight-heading);
}

.page-platform .biz__visual-caption {
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  max-width: 22ch;
}

.page-platform .biz__visual--stat {
  background: var(--color-highlight);
  border-radius: var(--radius-md);
  align-items: flex-start;
  justify-content: center;
}

.page-platform .biz__visual--stat .figure {
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  line-height: 1;
  color: var(--color-accent);
  font-weight: var(--weight-heading);
}

.page-platform .biz__visual--stat .figure__unit {
  font-size: var(--text-sm);
  color: var(--color-ink);
}

.page-platform .biz__visual-note {
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  margin: var(--space-2) 0 0;
  max-width: 24ch;
}

.page-platform .biz--five {
  padding-inline: var(--space-4);
  background: var(--color-primary-soft);
  border-radius: var(--radius-lg);
  border-block-start: 0;
}

.page-platform .biz--five .biz__facts li {
  border-block-start-color: color-mix(in srgb, var(--color-primary) 24%, transparent);
}

/* ---------- 配套与支持：三张错位卡纸 ---------- */

.page-platform .platform-support__head {
  max-width: var(--measure);
}

.page-platform .platform-support__intro {
  margin-block-start: var(--space-2);
  color: var(--color-ink-soft);
}

.page-platform .support-list {
  margin-block-start: var(--space-6);
  display: grid;
  gap: var(--space-3);
}

.page-platform .support {
  padding: var(--space-4);
  transition: transform 200ms ease, box-shadow 200ms ease;
}

.page-platform .support--a {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-1);
  border-inline-start: 4px solid var(--color-primary);
}

.page-platform .support--b {
  background: var(--color-primary-soft);
  border-radius: var(--radius-sm);
}

.page-platform .support--c {
  background: var(--color-highlight);
  border-radius: var(--radius-md);
}

.page-platform .support__title {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  color: var(--color-ink);
  margin: 0 0 var(--space-2);
}

.page-platform .support__text {
  color: var(--color-ink-soft);
  margin: 0 0 var(--space-2);
}

.page-platform .support__meta {
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  margin: 0;
  padding-block-start: var(--space-1);
  border-block-start: var(--border-thin) solid var(--color-line);
}

/* ---------- 对照区：窄栏 + 宽栏 ---------- */

.page-platform .platform-compare__grid {
  display: grid;
  gap: var(--space-6);
}

.page-platform .platform-compare__title {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-2xl);
  line-height: var(--leading-heading);
  color: var(--color-ink);
  margin: var(--space-2) 0 var(--space-3);
}

.page-platform .platform-compare__note {
  color: var(--color-ink-soft);
  margin: 0;
}

.page-platform .compare-rows {
  display: grid;
  gap: var(--space-3);
}

.page-platform .compare-row {
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface-alt);
  border-radius: var(--radius-md);
}

.page-platform .compare-row:nth-child(2) {
  background: var(--color-surface-deep);
  border-radius: var(--radius-sm);
}

.page-platform .compare-row:nth-child(3) {
  background: var(--color-highlight);
  border-radius: var(--radius-lg);
}

.page-platform .compare-row__angle {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  color: var(--color-primary);
  margin: 0 0 var(--space-1);
}

.page-platform .compare-row__text {
  color: var(--color-ink);
  margin: 0;
}

.page-platform .platform-compare__media {
  margin-block-start: var(--space-6);
}

.page-platform .platform-compare__media .media__img {
  border-radius: var(--radius-lg);
}

/* ---------- 起步方式：深色带 + 图例标签 ---------- */

.page-platform .platform-start .eyebrow {
  color: var(--color-contrast-accent);
}

.page-platform .platform-start .page-title {
  color: var(--color-contrast-ink);
}

.page-platform .platform-start .lead {
  color: color-mix(in srgb, var(--color-contrast-ink) 82%, transparent);
  max-width: 52ch;
}

.page-platform .start-tags {
  margin-block-start: var(--space-6);
  display: grid;
  gap: var(--space-2);
}

.page-platform .start-tag {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "dot title"
    "dot sub";
  column-gap: var(--space-2);
  row-gap: 2px;
  padding: var(--space-3);
  background: color-mix(in srgb, var(--color-contrast-ink) 8%, transparent);
  border-radius: var(--radius-sm);
  border: var(--border-thin) solid var(--color-contrast-line);
  text-decoration: none;
  transition: background-color 200ms ease, transform 200ms ease;
}

.page-platform .start-tag:nth-child(2) {
  border-radius: var(--radius-lg);
}

.page-platform .start-tag:nth-child(3) {
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--color-contrast-accent) 18%, transparent);
}

.page-platform .start-tag:hover,
.page-platform .start-tag:focus-visible {
  background: color-mix(in srgb, var(--color-contrast-ink) 16%, transparent);
  transform: translateY(-2px);
}

.page-platform .start-tag__dot {
  grid-area: dot;
  inline-size: 12px;
  block-size: 12px;
  margin-block-start: 7px;
  border-radius: 3px;
  background: var(--color-contrast-accent);
}

.page-platform .start-tag__title {
  grid-area: title;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  color: var(--color-contrast-ink);
}

.page-platform .start-tag__sub {
  grid-area: sub;
  font-size: var(--text-sm);
  color: color-mix(in srgb, var(--color-contrast-ink) 74%, transparent);
}

.page-platform .start-note {
  margin-block-start: var(--space-4);
  color: color-mix(in srgb, var(--color-contrast-ink) 80%, transparent);
  max-width: 66ch;
}

.page-platform .start-note a {
  color: var(--color-contrast-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 焦点可见性 ---------- */

.page-platform a:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-platform .platform-hero {
    padding-block: var(--space-8) var(--section-y);
  }

  .page-platform .platform-hero__figures {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-3);
  }

  .page-platform .figure-item {
    padding: var(--space-3);
  }

  .page-platform .platform-hero__media {
    margin-block-start: var(--space-8);
  }

  .page-platform .biz__facts li {
    grid-template-columns: 7em 1fr;
    gap: var(--space-2);
    align-items: baseline;
  }

  .page-platform .support-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-4);
    align-items: start;
  }

  .page-platform .support--b {
    margin-block-start: var(--space-4);
  }

  .page-platform .support--c {
    margin-block-start: var(--space-2);
  }

  .page-platform .start-tags {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-platform .platform-hero__grid {
    grid-template-columns: 7fr 5fr;
    align-items: end;
    gap: var(--space-8);
  }

  .page-platform .platform-hero__figures {
    grid-template-columns: 1fr;
    gap: var(--space-2);
  }

  .page-platform .platform-hero__service {
    font-size: var(--text-2xl);
    padding: 14px var(--space-4);
  }

  .page-platform .biz {
    gap: var(--space-6);
    align-items: center;
    padding-block: var(--section-y);
  }

  .page-platform .biz--one {
    grid-template-columns: var(--pp-wide) 4fr;
  }

  .page-platform .biz--two {
    grid-template-columns: 4fr var(--pp-wide);
  }

  .page-platform .biz--three {
    grid-template-columns: 5fr 6fr;
  }

  .page-platform .biz--four {
    grid-template-columns: var(--pp-wide) 4fr;
  }

  .page-platform .biz--five {
    grid-template-columns: 8fr 4fr;
    padding-inline: var(--space-6);
    padding-block: var(--space-6);
  }

  .page-platform .platform-compare__grid {
    grid-template-columns: 5fr 7fr;
    gap: var(--space-8);
    align-items: start;
  }

  .page-platform .platform-compare__aside {
    position: sticky;
    top: 120px;
  }

  .page-platform .platform-compare__media {
    margin-inline-end: auto;
    margin-inline-start: 0;
    max-width: 76%;
  }
}

@media (min-width: 1080px) {
  .page-platform .platform-hero__service {
    font-size: var(--text-3xl);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-platform .biz,
  .page-platform .biz__visual,
  .page-platform .support,
  .page-platform .start-tag {
    transition: none;
  }

  .page-platform .biz:hover,
  .page-platform .start-tag:hover,
  .page-platform .start-tag:focus-visible {
    transform: none;
  }
}
<<<END>>>