.page-about {
  padding-bottom: 0;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  padding-top: 20px;
  padding-bottom: 4px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 5vw, 48px) 0 clamp(32px, 6vw, 64px);
  border-bottom: 1px solid var(--line-soft);
  background:
    radial-gradient(120% 90% at 100% 0%, rgba(27, 87, 214, 0.10), transparent 62%),
    linear-gradient(180deg, rgba(246, 241, 231, 0.7), rgba(246, 241, 231, 0));
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(10, 31, 60, 0.055) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(10, 31, 60, 0.055) 1px, transparent 1px);
  background-size: 34px 34px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 88%);
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 88%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 44px);
  align-items: center;
}

.page-about .about-hero__kicker {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--blue);
}

.page-about .about-hero h1 {
  margin: 0 0 18px;
  font-size: clamp(30px, 7vw, 52px);
  line-height: 1.12;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--deep);
  max-width: 15em;
}

.page-about .about-hero__lede {
  margin: 0 0 28px;
  max-width: 34ch;
  color: var(--ink-2);
  line-height: 1.75;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  margin-bottom: 28px;
}

.page-about .about-stat {
  background: var(--paper-2);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-stat__num {
  font-size: clamp(24px, 4vw, 32px);
  font-weight: 700;
  color: var(--orange);
  line-height: 1;
}

.page-about .about-stat__label {
  font-size: 13px;
  color: var(--ink-2);
  line-height: 1.4;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-hero__visual {
  position: relative;
}

.page-about .about-hero__visual svg {
  display: block;
  width: 100%;
  height: auto;
  max-width: 520px;
  margin: 0 auto;
}

/* ---------- 主体两栏 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  padding-top: clamp(32px, 5vw, 56px);
  padding-bottom: clamp(48px, 8vw, 96px);
}

/* ---------- 左侧章节索引 ---------- */
.page-about .about-rail {
  min-width: 0;
}

.page-about .about-rail__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-2);
}

.page-about .about-rail__list {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 0 0 6px;
  margin: 0;
  list-style: none;
  scrollbar-width: thin;
}

.page-about .about-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
  min-height: 44px;
  padding: 0 14px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: var(--paper-2);
  font-size: 14px;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 200ms var(--ease), color 200ms var(--ease), background 200ms var(--ease);
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  border-color: var(--blue);
  color: var(--blue);
}

.page-about .about-rail__num {
  font-size: 12px;
  color: var(--blue);
}

/* ---------- 章节统一节奏 ---------- */
.page-about .about-chapter {
  margin-bottom: clamp(48px, 7vw, 80px);
}

.page-about .about-chapter:last-of-type {
  margin-bottom: 0;
}

.page-about .about-chapter__head {
  margin-bottom: 20px;
}

.page-about .about-chapter__prose {
  max-width: 34ch;
  margin-bottom: 28px;
  color: var(--ink);
}

.page-about .about-chapter__prose p {
  margin: 0 0 14px;
}

.page-about .about-chapter__prose p:last-child {
  margin-bottom: 0;
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 0 0 28px;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 品牌来历：阶段路径 ---------- */
.page-about .about-era {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-era__item {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line-soft);
  position: relative;
}

.page-about .about-era__mark {
  font-size: 13px;
  font-weight: 700;
  color: var(--blue);
  padding-top: 4px;
}

.page-about .about-era__body h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 800;
  color: var(--deep);
}

.page-about .about-era__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-2);
}

.page-about .about-era__item--now {
  background: linear-gradient(90deg, rgba(240, 101, 13, 0.07), transparent 70%);
}

.page-about .about-era__item--now .about-era__mark {
  color: var(--orange);
}

.page-about .about-era__item--now::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--orange);
}

/* ---------- 团队构成 ---------- */
.page-about .about-team {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .about-team__card {
  background: var(--paper-2);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  padding: 22px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: border-color 220ms var(--ease), transform 220ms var(--ease);
}

.page-about .about-team__card:hover {
  border-color: var(--blue);
  transform: translateY(-2px);
}

.page-about .about-team__count {
  font-size: 34px;
  font-weight: 700;
  line-height: 1;
  color: var(--orange);
}

.page-about .about-team__role {
  margin: 0;
  font-size: 17px;
  font-weight: 800;
  color: var(--deep);
}

.page-about .about-team__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-2);
}

/* ---------- 内容生产流程 ---------- */
.page-about .about-flow {
  list-style: none;
  margin: 0 0 28px;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  counter-reset: flow;
}

.page-about .about-flow__step {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding-bottom: 16px;
  border-bottom: 1px dashed var(--line-soft);
}

.page-about .about-flow__step:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-flow__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius);
  background: var(--deep);
  color: var(--paper);
  font-size: 14px;
  font-weight: 700;
}

.page-about .about-flow__step h3 {
  margin: 6px 0 6px;
  font-size: 17px;
  font-weight: 800;
  color: var(--deep);
}

.page-about .about-flow__step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-2);
}

/* ---------- 版本迭代 ---------- */
.page-about .about-version {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  border-left: 2px solid var(--line);
}

.page-about .about-version__item {
  position: relative;
  padding: 4px 0 26px 22px;
}

.page-about .about-version__item::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 10px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--paper-2);
  border: 2px solid var(--blue);
}

.page-about .about-version__item:last-child {
  padding-bottom: 4px;
}

.page-about .about-version__item--now::before {
  border-color: var(--orange);
  background: var(--orange);
}

.page-about .about-version__count {
  display: inline-block;
  margin-bottom: 6px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--blue);
}

.page-about .about-version__item--now .about-version__count {
  color: var(--orange);
}

.page-about .about-version__item h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 800;
  color: var(--deep);
}

.page-about .about-version__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-2);
}

/* ---------- 资质与协作 ---------- */
.page-about .about-trust {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-bottom: 28px;
}

.page-about .about-trust__block {
  background: var(--paper-2);
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--blue);
  border-radius: var(--radius);
  padding: 20px 20px 22px;
}

.page-about .about-trust__label {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-2);
}

.page-about .about-trust__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-about .about-trust__list li {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink);
}

.page-about .about-scale {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-scale__item {
  background: var(--deep);
  color: var(--paper);
  padding: 20px 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-scale__num {
  font-size: clamp(26px, 5vw, 34px);
  font-weight: 700;
  line-height: 1;
  color: var(--sky);
}

.page-about .about-scale__unit {
  font-size: 0.55em;
  margin-left: 2px;
  color: var(--orange);
}

.page-about .about-scale__text {
  font-size: 13px;
  line-height: 1.5;
  color: rgba(255, 255, 255, 0.78);
}

/* ---------- 城市章节 ---------- */
.page-about .about-chapter--city .about-chapter__prose {
  max-width: 38ch;
}

/* ---------- 收尾引导 ---------- */
.page-about .about-next {
  margin-top: clamp(40px, 6vw, 64px);
}

.page-about .about-next__panel {
  background: var(--deep);
  border-radius: var(--radius);
  padding: clamp(24px, 4vw, 40px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  position: relative;
  overflow: hidden;
}

.page-about .about-next__panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--blue) 0%, var(--sky) 45%, var(--orange) 100%);
}

.page-about .about-next__kicker {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--sky);
}

.page-about .about-next__text h2 {
  margin: 0 0 12px;
  font-size: clamp(20px, 3.4vw, 26px);
  font-weight: 800;
  line-height: 1.3;
  color: var(--paper);
}

.page-about .about-next__text p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.76);
  max-width: 46ch;
}

.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-content: start;
}

.page-about .about-next__links .bs-btn--ghost {
  color: var(--paper);
  border-color: rgba(255, 255, 255, 0.42);
}

.page-about .about-next__links .bs-btn--ghost:hover,
.page-about .about-next__links .bs-btn--ghost:focus-visible {
  border-color: var(--orange);
  color: var(--orange);
}

/* ---------- 平板 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-team {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-trust {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px 26px;
  }

  .page-about .about-flow__step {
    border-bottom: 0;
    padding-bottom: 0;
  }

  .page-about .about-next__panel {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    align-items: center;
  }

  .page-about .about-next__links {
    justify-content: flex-end;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 960px) {
  .page-about .about-hero__inner {
    grid-template-columns: 7fr 5fr;
  }

  .page-about .about-body {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 56px;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    align-self: start;
  }

  .page-about .about-rail__list {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
    gap: 4px;
  }

  .page-about .about-rail__link {
    justify-content: flex-start;
    width: 100%;
    background: transparent;
    border-color: transparent;
    border-left: 2px solid var(--line-soft);
    border-radius: 0;
    padding: 0 12px;
    color: var(--ink-2);
  }

  .page-about .about-rail__link:hover,
  .page-about .about-rail__link:focus-visible {
    border-left-color: var(--orange);
    background: rgba(255, 255, 255, 0.6);
    color: var(--deep);
  }

  .page-about .about-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-era__item {
    grid-template-columns: 110px minmax(0, 1fr);
    gap: 24px;
    padding: 24px 0;
  }

  .page-about .about-scale {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 降低动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-team__card {
    transition: none;
  }

  .page-about .about-team__card:hover {
    transform: none;
  }
}
<<<END>>>