.page-about {
  --rail-w: 216px;
  display: block;
  padding-bottom: 72px;
}

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

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 40px 0 56px;
  background: var(--grad-night);
  border-bottom: var(--edge-strong);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  right: -70px;
  top: -110px;
  width: 320px;
  height: 320px;
  background: linear-gradient(140deg, rgba(34, 224, 214, .24), rgba(34, 224, 214, 0));
  clip-path: polygon(28% 0, 100% 0, 100% 72%);
  pointer-events: none;
}

.page-about .about-hero .breadcrumb {
  position: relative;
  z-index: 1;
  margin-bottom: 26px;
}

.page-about .hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}

.page-about .hero-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(28px, 7vw, 62px);
  line-height: 1.1;
  letter-spacing: .01em;
  color: var(--white);
  margin: 12px 0 18px;
  max-width: 20ch;
}

.page-about .hero-main .lede {
  color: var(--silver);
  font-size: 16px;
  line-height: 1.78;
  margin: 0;
  max-width: 46ch;
}

.page-about .hero-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(199, 206, 216, .16);
  border: var(--edge-strong);
  margin: 0;
}

.page-about .hero-fact {
  background: rgba(11, 14, 18, .66);
  padding: 14px 16px;
}

.page-about .hero-fact dt {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
  margin: 0 0 6px;
}

.page-about .hero-fact dd {
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1.2;
  color: var(--cyan);
  margin: 0;
}

/* ---------- 主体双栏 ---------- */

.page-about .about-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  padding-top: 48px;
}

/* ---------- 左侧索引窄栏 ---------- */

.page-about .rail-nav {
  border: var(--edge);
  background: var(--panel);
  padding: 16px 14px;
}

.page-about .rail-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--muted);
}

.page-about .rail-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-about .rail-list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 10px;
  color: var(--silver);
  text-decoration: none;
  font-size: 14px;
  border-left: 2px solid transparent;
  background: transparent;
  transition: color .24s var(--ease), border-color .24s var(--ease), background-color .24s var(--ease);
}

.page-about .rail-list a:hover,
.page-about .rail-list a:focus-visible {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: rgba(34, 224, 214, .07);
}

.page-about .rail-list a[aria-current] {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: rgba(34, 224, 214, .1);
}

.page-about .rail-idx {
  font-size: 12px;
  color: var(--muted);
}

.page-about .rail-list a[aria-current] .rail-idx {
  color: var(--cyan);
}

.page-about .rail-label {
  flex: 1 1 auto;
}

/* ---------- 章节基座 ---------- */

.page-about .about-section {
  position: relative;
  isolation: isolate;
  padding-bottom: 64px;
  margin-bottom: 64px;
  border-bottom: var(--hairline);
}

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

.page-about .about-section > *:not(.watermark) {
  position: relative;
  z-index: 1;
}

.page-about .watermark {
  position: absolute;
  top: -18px;
  right: 0;
  z-index: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(70px, 15vw, 156px);
  line-height: .8;
  letter-spacing: -.03em;
  color: rgba(199, 206, 216, .055);
  pointer-events: none;
  user-select: none;
}

.page-about .section-head {
  max-width: 62ch;
  margin-bottom: 30px;
}

.page-about .section-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(23px, 3.4vw, 38px);
  line-height: 1.18;
  letter-spacing: .01em;
  color: var(--white);
  margin: 8px 0 14px;
}

.page-about .section-lede {
  margin: 0;
  max-width: 46ch;
  color: var(--silver);
  font-size: 16px;
  line-height: 1.78;
}

/* ---------- 图片容器 ---------- */

.page-about .media {
  margin: 0;
  border: var(--edge-strong);
  background: var(--panel-deep);
  overflow: hidden;
}

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

.page-about .media-wide {
  margin: 0 0 36px;
}

.page-about .media-wide img {
  aspect-ratio: 14 / 9;
}

.page-about .media-banner {
  margin: 0 0 34px;
}

.page-about .media-banner img {
  aspect-ratio: 3 / 2;
}

.page-about .media-square img {
  aspect-ratio: 12 / 7;
}

.page-about .media-cap {
  padding: 10px 14px;
  border-top: var(--hairline);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--muted);
}

/* ---------- 成长时间线 ---------- */

.page-about .stage-list {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .stage-list::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan) 0%, rgba(34, 224, 214, .12) 100%);
}

.page-about .stage-item {
  position: relative;
  padding: 0 0 30px 38px;
}

.page-about .stage-item:last-child {
  padding-bottom: 0;
}

.page-about .stage-dot {
  position: absolute;
  left: 0;
  top: 4px;
  width: 16px;
  height: 16px;
  display: grid;
  place-items: center;
}

.page-about .stage-year {
  margin: 0 0 4px;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--cyan);
}

.page-about .stage-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.35;
  letter-spacing: .01em;
  color: var(--white);
  margin: 0 0 8px;
}

.page-about .stage-body p:last-child {
  margin: 0;
  max-width: 48ch;
  color: var(--silver);
  font-size: 15px;
  line-height: 1.78;
}

/* ---------- 团队构成 ---------- */

.page-about .team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .team-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 20px;
  border: var(--edge-strong);
  background: var(--panel);
  box-shadow: var(--shadow-soft);
}

.page-about .team-num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 40px;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--cyan);
}

.page-about .team-role {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--white);
}

.page-about .team-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--silver);
}

.page-about .team-points {
  list-style: none;
  margin: 4px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.page-about .team-points li {
  position: relative;
  padding-left: 15px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
}

.page-about .team-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  background: var(--cyan);
}

/* ---------- 内容标准 ---------- */

.page-about .std-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-bottom: 36px;
}

.page-about .std-card {
  padding: 22px 20px 20px;
  border: var(--edge-strong);
  background: var(--panel);
  box-shadow: var(--shadow-hard);
  transition: border-color .24s var(--ease), transform .24s var(--ease), box-shadow .24s var(--ease);
}

.page-about .std-card:hover {
  border-color: var(--cyan);
  transform: translate(-2px, -2px);
  box-shadow: 8px 8px 0 rgba(0, 0, 0, .5);
}

.page-about .std-num {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 38px;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--white);
}

.page-about .std-unit {
  font-family: var(--font-body);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--muted);
}

.page-about .std-label {
  margin: 0 0 8px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--cyan);
}

.page-about .std-note {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--silver);
}

.page-about .pull-quote {
  margin: 0;
  padding: 6px 0 6px 22px;
  border-left: 3px solid var(--orange);
}

.page-about .pull-quote p {
  margin: 0;
  max-width: 32ch;
  font-family: var(--font-serif);
  font-size: clamp(19px, 2.6vw, 26px);
  line-height: 1.62;
  letter-spacing: .01em;
  color: var(--white);
}

/* ---------- 合作生态 ---------- */

.page-about .eco-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

.page-about .eco-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: rgba(199, 206, 216, .14);
  border: var(--edge-strong);
}

.page-about .eco-item {
  background: var(--panel);
  padding: 20px 18px;
}

.page-about .eco-num {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 28px;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--orange);
}

.page-about .eco-num span {
  margin-left: 3px;
  font-size: 13px;
  color: var(--muted);
}

.page-about .eco-title {
  margin: 0 0 8px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .01em;
  color: var(--white);
}

.page-about .eco-item p:last-child {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--silver);
}

/* ---------- 行业认可 ---------- */

.page-about .award-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-bottom: 34px;
}

.page-about .award-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 22px 20px;
  border: var(--edge-strong);
  background: var(--panel);
  box-shadow: var(--shadow-soft);
}

.page-about .award-year {
  margin: 0;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--orange);
}

.page-about .award-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.35;
  color: var(--white);
}

.page-about .award-card p:last-child {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--silver);
}

/* ---------- 合作入口面板 ---------- */

.page-about .cta-panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  padding: 26px 22px;
  margin-bottom: 30px;
  border: var(--edge-strong);
  background: var(--grad-night);
}

.page-about .cta-panel h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 21px;
  line-height: 1.3;
  color: var(--white);
}

.page-about .cta-panel p {
  margin: 0;
  max-width: 44ch;
  font-size: 15px;
  line-height: 1.72;
  color: var(--silver);
}

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

/* ---------- 延伸入口 ---------- */

.page-about .quick-links {
  padding-top: 22px;
  border-top: var(--hairline);
}

.page-about .quick-title {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--muted);
}

.page-about .quick-links ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
}

.page-about .quick-links a {
  display: inline-block;
  padding-bottom: 2px;
  font-size: 15px;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 224, 214, .35);
  transition: color .22s var(--ease), border-color .22s var(--ease);
}

.page-about .quick-links a:hover,
.page-about .quick-links a:focus-visible {
  color: var(--white);
  border-bottom-color: var(--white);
}

/* ---------- 返回顶部 ---------- */

.page-about .to-top {
  position: fixed;
  right: 18px;
  bottom: 22px;
  z-index: 40;
  padding: 10px 14px;
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--silver);
  background: var(--panel-raise);
  border: var(--edge-strong);
  border-radius: var(--radius);
  cursor: pointer;
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
  transition: opacity .24s var(--ease), transform .24s var(--ease), border-color .22s var(--ease), color .22s var(--ease);
}

.page-about .to-top[data-visible="true"] {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

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

/* ---------- 响应式 ---------- */

@media (min-width: 520px) {
  .page-about .eco-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 720px) {
  .page-about .team-grid,
  .page-about .award-grid,
  .page-about .std-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 52px 0 68px;
  }

  .page-about .hero-grid {
    grid-template-columns: minmax(0, 1.65fr) minmax(0, 1fr);
    gap: 54px;
    align-items: end;
  }

  .page-about .eco-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 34px;
    align-items: start;
  }

  .page-about .cta-panel {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: center;
    gap: 30px;
    padding: 32px;
  }
}

@media (min-width: 1080px) {
  .page-about .about-layout {
    grid-template-columns: var(--rail-w) minmax(0, 1fr);
    gap: 60px;
    padding-top: 68px;
  }

  .page-about .rail-nav {
    position: sticky;
    top: 92px;
  }

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

@media (min-width: 1200px) {
  .page-about .std-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}
</PAGE_CSS>>>