.page-about {
  --ab-rail: 200px;
  --ab-gap: clamp(28px, 5vw, 72px);
  --ab-line: 2px solid var(--line);
}

.page-about img {
  max-width: 100%;
  height: auto;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: clamp(104px, 15vw, 190px) 0 clamp(40px, 6vw, 88px);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -20% -10% 30% 40%;
  background:
    radial-gradient(circle at 30% 30%, rgba(53, 240, 206, .12), transparent 62%),
    radial-gradient(circle at 72% 62%, rgba(20, 112, 95, .22), transparent 66%);
  pointer-events: none;
}

.page-about .about-hero > .wrap {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__crumbs {
  margin-bottom: clamp(22px, 4vw, 44px);
}

.page-about .about-hero__title {
  margin: 0.18em 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(38px, 8.4vw, 116px);
  line-height: 0.94;
  letter-spacing: -0.03em;
  color: var(--text);
  text-wrap: balance;
}

.page-about .about-hero__accent {
  color: var(--cyan);
}

.page-about .about-hero__lower {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  align-items: end;
  margin-top: clamp(30px, 5vw, 56px);
}

.page-about .about-hero__say .lead {
  max-width: 46ch;
  margin: 0 0 clamp(20px, 3vw, 32px);
  color: var(--text);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.page-about .about-hero__media {
  margin: 0;
  border: var(--ab-line);
  background: var(--ink-2);
  box-shadow: var(--shadow-hard);
}

.page-about .about-hero__media .media__frame {
  display: block;
  overflow: hidden;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  object-fit: cover;
}

.page-about .about-hero__media .media__caption {
  padding: 12px 16px;
  border-top: var(--ab-line);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

@media (min-width: 900px) {
  .page-about .about-hero__lower {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.85fr);
  }
}

/* ---------- 通栏概况带 ---------- */

.page-about .about-stats {
  border-top: var(--ab-line);
  border-bottom: var(--ab-line);
  background: var(--ink-2);
}

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

.page-about .about-stats__row .databand__item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(18px, 3vw, 30px) clamp(14px, 2.4vw, 26px);
  border-left: var(--ab-line);
  min-width: 0;
}

.page-about .about-stats__row .databand__item:nth-child(odd) {
  border-left: 0;
}

.page-about .about-stats__row .databand__item--accent {
  background: rgba(255, 138, 43, .08);
}

.page-about .about-stats__row .databand__item--accent .databand__value {
  color: var(--orange);
}

.page-about .about-stats__row .databand__value {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(20px, 3.4vw, 34px);
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
  line-height: 1.1;
}

.page-about .about-stats__row .databand__label {
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--muted);
}

@media (min-width: 760px) {
  .page-about .about-stats__row {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-stats__row .databand__item:nth-child(odd) {
    border-left: var(--ab-line);
  }
  .page-about .about-stats__row .databand__item:first-child {
    border-left: 0;
  }
}

/* ---------- 主体骨架：左索引 + 右长卷 ---------- */

.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 48px);
  padding-block: clamp(48px, 7vw, 104px);
}

.page-about .about-index {
  min-width: 0;
}

.page-about .about-index__label {
  margin: 0 0 10px;
  color: var(--orange-soft);
}

.page-about .about-index__list {
  display: flex;
  gap: 16px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  white-space: nowrap;
}

.page-about .about-index__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 4px;
  color: var(--muted);
  font-size: 14px;
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color .22s var(--ease), border-color .22s var(--ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-about .about-index__num {
  font-size: 12px;
  color: var(--cyan-deep);
}

.page-about .about-flow {
  min-width: 0;
}

@media (min-width: 960px) {
  .page-about .about-body {
    grid-template-columns: var(--ab-rail) minmax(0, 1fr);
    gap: var(--ab-gap);
    align-items: start;
  }
  .page-about .about-index {
    position: sticky;
    top: calc(var(--header-h-scrolled) + 26px);
  }
  .page-about .about-index__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    white-space: normal;
  }
  .page-about .about-index__link {
    width: 100%;
    padding: 8px 10px;
    border-bottom: 0;
    border-left: 2px solid transparent;
  }
  .page-about .about-index__link:hover,
  .page-about .about-index__link:focus-visible {
    border-bottom: 0;
    border-left-color: var(--cyan);
    background: rgba(53, 240, 206, .06);
  }
}

/* ---------- 章节 ---------- */

.page-about .about-chapter {
  padding-block: clamp(36px, 6vw, 76px);
  border-top: var(--ab-line);
}

.page-about .about-chapter:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-chapter__head {
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-about .about-chapter__num {
  display: block;
  font-size: clamp(44px, 8vw, 104px);
  line-height: 0.8;
  letter-spacing: -0.05em;
  color: rgba(53, 240, 206, .16);
  margin-bottom: -0.12em;
}

.page-about .about-chapter__title {
  position: relative;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 3.6vw, 50px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-about .about-chapter__body p {
  max-width: 66ch;
  margin: 0 0 1.2em;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
}

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

.page-about .about-quote {
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding-left: 20px;
  border-left: 4px solid var(--cyan);
  max-width: 40ch;
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.6;
  color: var(--text);
}

/* ---------- 岗位可展开组 ---------- */

.page-about .about-roles {
  margin: clamp(24px, 4vw, 40px) 0;
}

.page-about .about-role {
  margin-bottom: 14px;
  border: var(--ab-line);
  background: var(--surface);
  box-shadow: 4px 4px 0 rgba(35, 88, 74, .9);
}

.page-about .about-role__trigger {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 16px 20px;
  border: 0;
  background: none;
  color: var(--text);
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: background .22s var(--ease);
}

.page-about .about-role__trigger:hover {
  background: rgba(53, 240, 206, .07);
}

.page-about .about-role__name {
  font-weight: 700;
  font-size: clamp(16px, 2vw, 19px);
  letter-spacing: 0.02em;
}

.page-about .about-role__count {
  font-size: 14px;
  color: var(--orange-soft);
  font-variant-numeric: tabular-nums;
}

.page-about .about-role__icon {
  display: inline-block;
  width: 26px;
  height: 26px;
  line-height: 24px;
  text-align: center;
  border: 2px solid var(--line);
  color: var(--cyan);
  font-size: 15px;
  transition: transform .25s var(--ease), border-color .25s var(--ease);
}

.page-about .about-role__trigger[aria-expanded="true"] .about-role__icon {
  transform: rotate(45deg);
  border-color: var(--cyan);
}

.page-about .about-role__panel {
  display: none;
  border-top: var(--ab-line);
  background: var(--ink-2);
}

.page-about .about-role__panel[data-open="true"] {
  display: block;
}

.page-about .about-role__body {
  padding: 16px 20px 20px;
}

.page-about .about-role__body p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 四步流程 ---------- */

.page-about .about-steps {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-steps__item {
  padding-top: 16px;
  border-top: 2px solid var(--cyan);
}

.page-about .about-steps__num {
  display: block;
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--cyan-deep);
  margin-bottom: 8px;
}

.page-about .about-steps__title {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
}

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

@media (min-width: 680px) {
  .page-about .about-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px 24px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 图片块 ---------- */

.page-about .about-team__media,
.page-about .about-version__media {
  margin: clamp(28px, 4vw, 48px) 0 0;
  border: var(--ab-line);
  background: var(--ink-2);
  box-shadow: var(--shadow-hard);
}

.page-about .about-team__media .media__frame,
.page-about .about-version__media .media__frame {
  display: block;
  overflow: hidden;
}

.page-about .about-team__media img,
.page-about .about-version__media img {
  display: block;
  width: 100%;
  object-fit: cover;
}

.page-about .about-team__media .media__caption,
.page-about .about-version__media .media__caption {
  padding: 12px 16px;
  border-top: var(--ab-line);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* ---------- 版本时间轴 ---------- */

.page-about .about-timeline {
  margin: clamp(26px, 4vw, 44px) 0;
  padding: clamp(14px, 2.6vw, 26px);
  border: var(--ab-line);
  background: var(--ink-2);
  box-shadow: var(--shadow-hard);
  overflow-x: auto;
}

.page-about .about-timeline svg {
  display: block;
  width: 100%;
  min-width: 540px;
  height: auto;
}

.page-about .about-timeline__caption {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

/* ---------- 人群数字与画像 ---------- */

.page-about .about-nums {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: clamp(22px, 3vw, 34px) 0;
  border: var(--ab-line);
  background: var(--line);
}

.page-about .about-nums__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 20px;
  background: var(--ink-2);
}

.page-about .about-nums__value {
  font-size: clamp(24px, 3.6vw, 38px);
  font-weight: 700;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

.page-about .about-nums__label {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-about .about-crowd {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: clamp(24px, 4vw, 40px);
}

.page-about .about-crowd__item {
  padding: clamp(18px, 2.4vw, 26px);
  border: var(--ab-line);
  background: var(--surface);
  box-shadow: 4px 4px 0 rgba(35, 88, 74, .9);
}

.page-about .about-crowd__item:nth-child(2) {
  border-color: var(--cyan-deep);
}

.page-about .about-crowd__item:nth-child(4) {
  background: var(--ink-2);
  border-left: 4px solid var(--orange);
}

.page-about .about-crowd__tag {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-about .about-crowd__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text);
}

@media (min-width: 720px) {
  .page-about .about-nums {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-crowd {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 18px;
  }
  .page-about .about-crowd__item:nth-child(1) { grid-column: 1 / span 7; }
  .page-about .about-crowd__item:nth-child(2) { grid-column: 8 / span 5; margin-top: 32px; }
  .page-about .about-crowd__item:nth-child(3) { grid-column: 1 / span 5; }
  .page-about .about-crowd__item:nth-child(4) { grid-column: 6 / span 7; margin-top: 32px; }
}

/* ---------- 长期运营条目 ---------- */

.page-about .about-trust {
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: 0;
  list-style: none;
  border-top: var(--ab-line);
}

.page-about .about-trust__item {
  display: grid;
  gap: 10px;
  padding: 20px 0;
  border-bottom: var(--ab-line);
}

.page-about .about-trust__key {
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--orange-soft);
}

.page-about .about-trust__val {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text);
}

@media (min-width: 760px) {
  .page-about .about-trust__item {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 24px;
    align-items: baseline;
    padding: 22px 0;
  }
}

/* ---------- 收束 ---------- */

.page-about .about-closing {
  margin-top: clamp(40px, 6vw, 80px);
  padding: clamp(26px, 4vw, 44px);
  border: var(--ab-line);
  border-left: 6px solid var(--orange);
  background: var(--ink-2);
  box-shadow: var(--shadow-hard-cyan);
}

.page-about .about-closing__line {
  margin: 0 0 clamp(20px, 3vw, 30px);
  max-width: 44ch;
  font-size: clamp(18px, 2.2vw, 24px);
  line-height: 1.6;
  color: var(--text);
}

.page-about .about-closing__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__link,
  .page-about .about-role__trigger,
  .page-about .about-role__icon {
    transition: none;
  }
}
<<<END>>>