.page-about {
  --about-gap: clamp(24px, 4vw, 48px);
  --about-pad: clamp(44px, 6.5vw, 92px);
}

.page-about .about-section {
  padding: var(--about-pad) 0;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 clamp(22px, 3.4vw, 40px);
  font-family: var(--font-mono);
  font-size: var(--fs--1);
  letter-spacing: 0.04em;
  color: rgba(244, 241, 234, 0.62);
}
.page-about .about-crumbs a {
  color: rgba(244, 241, 234, 0.78);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.page-about .about-crumbs a:hover {
  color: var(--white);
  border-bottom-color: var(--orange);
}
.page-about .about-crumbs__sep {
  color: rgba(244, 241, 234, 0.34);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  color: var(--paper);
  padding: clamp(26px, 4vw, 44px) 0 clamp(38px, 6vw, 76px);
}
.page-about .about-hero__deco {
  position: absolute;
  inset: 0 0 0 auto;
  width: min(52%, 560px);
  background-image: radial-gradient(rgba(244, 241, 234, 0.16) 1px, transparent 1px);
  background-size: 20px 20px;
  opacity: 0.7;
  mask-image: linear-gradient(to left, #000 10%, transparent 92%);
  -webkit-mask-image: linear-gradient(to left, #000 10%, transparent 92%);
  pointer-events: none;
}
.page-about .about-hero .container {
  position: relative;
  z-index: 1;
}
.page-about .about-hero__grid {
  display: grid;
  gap: clamp(24px, 4vw, 52px);
}
.page-about .about-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 5.2vw, 3.7rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--white);
}
.page-about .about-hero__lead {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(1rem, 1.5vw, 1.15rem);
  line-height: 1.92;
  color: rgba(244, 241, 234, 0.84);
  max-width: 58ch;
}
.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}
.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 22px;
  margin-top: clamp(30px, 5vw, 56px);
  padding-top: clamp(20px, 3vw, 28px);
  border-top: 1px solid rgba(244, 241, 234, 0.18);
}
.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-left: 12px;
  border-left: 2px solid var(--violet);
}
.page-about .about-stat:nth-child(2n) {
  border-left-color: var(--cyan);
}
.page-about .about-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(1.3rem, 2.4vw, 1.85rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--white);
}
.page-about .about-stat__label {
  font-size: var(--fs--1);
  letter-spacing: 0.02em;
  color: rgba(244, 241, 234, 0.62);
}

/* ---------- 通用标题与标签 ---------- */
.page-about .about-kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: var(--fs--1);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--violet);
}
.page-about .about-kicker::before {
  content: "";
  width: 24px;
  height: 2px;
  background: var(--violet);
  flex: none;
}
.page-about .about-kicker--onDark {
  color: var(--orange);
}
.page-about .about-kicker--onDark::before {
  background: var(--orange);
}
.page-about .about-head {
  margin-bottom: clamp(24px, 4vw, 44px);
  max-width: 74ch;
}
.page-about .about-head__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 3.1vw, 2.3rem);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.015em;
  color: var(--ink);
}
.page-about .about-head__title--light {
  color: var(--white);
}
.page-about .about-head__lead {
  margin: 0;
  font-size: var(--fs-1);
  line-height: 1.82;
  color: var(--graphite);
  max-width: 66ch;
}
.page-about .about-head__lead + .about-head__lead {
  margin-top: 14px;
}
.page-about .about-head__lead--light {
  color: rgba(244, 241, 234, 0.82);
}

/* ---------- 按钮 ---------- */
.page-about .about-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  font-family: var(--font-body);
  font-size: var(--fs-0);
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
  border: 2px solid transparent;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease),
    border-color 0.2s var(--ease), transform 0.2s var(--ease);
}
.page-about .about-btn:hover {
  transform: translateY(-2px);
}
.page-about .about-btn--solid {
  background: var(--violet);
  color: var(--white);
}
.page-about .about-btn--solid:hover {
  background: var(--violet-hi);
}
.page-about .about-btn--ghost {
  border-color: rgba(244, 241, 234, 0.5);
  color: var(--paper);
}
.page-about .about-btn--ghost:hover {
  background: rgba(244, 241, 234, 0.14);
  border-color: var(--paper);
}
.page-about .about-btn--light {
  background: var(--paper);
  color: var(--ink);
}
.page-about .about-btn--light:hover {
  background: var(--white);
}
.page-about .about-next__panel .about-btn--ghost {
  border-color: rgba(255, 255, 255, 0.62);
  color: var(--white);
}
.page-about .about-next__panel .about-btn--ghost:hover {
  background: rgba(255, 255, 255, 0.16);
  border-color: var(--white);
}

/* ---------- 图片容器 ---------- */
.page-about .about-figure {
  margin: 0 0 clamp(26px, 4vw, 48px);
}
.page-about .about-figure__frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 2 / 1;
  background: var(--ink-soft);
  border: 1px solid var(--rule);
  box-shadow: var(--shadow-lift);
}
.page-about .about-figure__frame--tall {
  aspect-ratio: 4 / 3;
}
.page-about .about-figure__frame img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}
.page-about .about-figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: var(--fs--1);
  letter-spacing: 0.04em;
  color: var(--graphite);
  opacity: 0.72;
}
.page-about .about-figure--side {
  margin-bottom: 0;
}
.page-about .about-figure--side .about-figure__frame {
  aspect-ratio: 3 / 2;
}

/* ---------- 版本时间线 ---------- */
.page-about .about-timeline {
  background: var(--paper);
}
.page-about .about-timeline__grid {
  display: grid;
  gap: var(--about-gap);
}
.page-about .about-timeline__rail {
  position: relative;
}
.page-about .about-rail__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: var(--fs--1);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--graphite);
  opacity: 0.62;
}
.page-about .about-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}
.page-about .about-rail__link {
  display: inline-flex;
  flex-direction: column;
  gap: 2px;
  padding: 8px 14px;
  font-size: var(--fs--1);
  color: var(--graphite);
  text-decoration: none;
  white-space: nowrap;
  background: var(--paper-2);
  border: 1px solid var(--rule);
  transition: background-color 0.18s var(--ease), color 0.18s var(--ease),
    border-color 0.18s var(--ease);
}
.page-about .about-rail__link span {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--violet);
}
.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  background: var(--violet);
  border-color: var(--violet);
  color: var(--white);
}
.page-about .about-rail__link:hover span,
.page-about .about-rail__link:focus-visible span {
  color: var(--white);
}

.page-about .about-era {
  position: relative;
  padding-left: 26px;
  margin-bottom: clamp(26px, 4vw, 42px);
  scroll-margin-top: 90px;
}
.page-about .about-era:last-child {
  margin-bottom: 0;
}
.page-about .about-era::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  bottom: -30px;
  width: 2px;
  background: var(--rule);
}
.page-about .about-era:last-child::before {
  bottom: auto;
  height: 46px;
}
.page-about .about-era::after {
  content: "";
  position: absolute;
  left: -5px;
  top: 6px;
  width: 12px;
  height: 12px;
  background: var(--paper);
  border: 2px solid var(--violet);
  border-radius: 50%;
}
.page-about .about-era--current::after {
  background: var(--orange);
  border-color: var(--orange);
}
.page-about .about-era__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 10px;
}
.page-about .about-era__ver {
  display: inline-block;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: var(--fs--1);
  font-weight: 700;
  color: var(--white);
  background: var(--violet);
}
.page-about .about-era--current .about-era__ver {
  background: var(--orange);
  color: var(--ink);
}
.page-about .about-era__code {
  font-family: var(--font-mono);
  font-size: var(--fs--1);
  letter-spacing: 0.08em;
  color: var(--graphite);
  opacity: 0.6;
}
.page-about .about-era__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(1.08rem, 1.8vw, 1.28rem);
  font-weight: 800;
  line-height: 1.34;
  color: var(--ink);
}
.page-about .about-era__text {
  margin: 0 0 12px;
  font-size: var(--fs-1);
  line-height: 1.82;
  color: var(--graphite);
  max-width: 62ch;
}
.page-about .about-era__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
}
.page-about .about-chip {
  display: inline-block;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: var(--fs--1);
  color: var(--graphite);
  background: var(--paper-2);
  border: 1px solid var(--rule);
}

/* ---------- 编辑室节奏 ---------- */
.page-about .about-newsroom {
  background: var(--paper-2);
}
.page-about .about-newsroom__grid {
  display: grid;
  gap: var(--about-gap);
  align-items: start;
  margin-bottom: clamp(26px, 4vw, 44px);
}
.page-about .about-beats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}
.page-about .about-beat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 16px;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-top: 3px solid var(--cyan);
}
.page-about .about-beat:nth-child(2n) {
  border-top-color: var(--violet);
}
.page-about .about-beat__num {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 700;
  line-height: 1;
  color: var(--ink);
}
.page-about .about-beat__label {
  font-size: var(--fs--1);
  letter-spacing: 0.02em;
  color: var(--graphite);
  opacity: 0.72;
}

/* ---------- 团队与协作 ---------- */
.page-about .about-team {
  background: var(--paper);
}
.page-about .about-coast {
  margin: 0 0 clamp(24px, 4vw, 42px);
}
.page-about .about-coast svg {
  display: block;
  width: 100%;
  height: clamp(34px, 6vw, 60px);
}
.page-about .about-coast__line {
  fill: none;
  stroke: var(--violet);
  stroke-width: 2;
  stroke-linejoin: round;
}
.page-about .about-coast__dots {
  fill: none;
  stroke: var(--rule-strong);
  stroke-width: 1;
  stroke-dasharray: 3 8;
}
.page-about .about-team__grid {
  display: grid;
  gap: var(--about-gap);
  align-items: start;
}
.page-about .about-team__cards {
  display: grid;
  gap: 14px;
}
.page-about .about-fact {
  padding: 18px 18px 18px 20px;
  background: var(--white);
  border: 1px solid var(--rule);
  border-left: 4px solid var(--violet);
}
.page-about .about-fact:nth-child(2) {
  border-left-color: var(--cyan);
}
.page-about .about-fact:nth-child(3) {
  border-left-color: var(--orange);
}
.page-about .about-fact__key {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: var(--fs--1);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--graphite);
  opacity: 0.66;
}
.page-about .about-fact__val {
  margin: 0;
  font-size: var(--fs-0);
  line-height: 1.78;
  color: var(--graphite);
}

/* ---------- 资质 ---------- */
.page-about .about-cred {
  background: var(--ink);
  color: var(--paper);
}
.page-about .about-cred__grid {
  display: grid;
  gap: 14px;
}
.page-about .about-cert {
  position: relative;
  padding: 20px 18px;
  background: rgba(244, 241, 234, 0.06);
  border: 1px solid var(--rule-dark);
  transition: background-color 0.22s var(--ease), border-color 0.22s var(--ease);
  outline-offset: 3px;
}
.page-about .about-cert:hover,
.page-about .about-cert:focus,
.page-about .about-cert:focus-within {
  background: rgba(244, 241, 234, 0.11);
  border-color: var(--violet-hi);
}
.page-about .about-cert__code {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: var(--fs--1);
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--cyan);
}
.page-about .about-cert__name {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--white);
}
.page-about .about-cert__more {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 0.34s var(--ease), opacity 0.24s var(--ease);
}
.page-about .about-cert:hover .about-cert__more,
.page-about .about-cert:focus .about-cert__more,
.page-about .about-cert:focus-within .about-cert__more {
  max-height: 240px;
  opacity: 1;
}
.page-about .about-cert__more p {
  margin: 12px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--rule-dark);
  font-size: var(--fs-0);
  line-height: 1.78;
  color: rgba(244, 241, 234, 0.78);
}

/* ---------- 服务覆盖 ---------- */
.page-about .about-reach {
  background: var(--paper);
}
.page-about .about-reach__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-bottom: 20px;
  background: var(--rule);
  border: 1px solid var(--rule);
}
.page-about .about-reach__cell {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 16px;
  background: var(--paper);
}
.page-about .about-reach__num {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 3.6vw, 2.5rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--violet);
}
.page-about .about-reach__cell:nth-child(2) .about-reach__num {
  color: var(--ink);
}
.page-about .about-reach__cell:nth-child(3) .about-reach__num {
  color: var(--cyan-deep);
}
.page-about .about-reach__cell:nth-child(4) .about-reach__num {
  color: var(--orange-deep);
}
.page-about .about-reach__label {
  font-size: var(--fs--1);
  letter-spacing: 0.04em;
  color: var(--graphite);
  opacity: 0.74;
}
.page-about .about-reach__notes {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(0.98rem, 1.4vw, 1.08rem);
  line-height: 1.85;
  color: var(--graphite);
  max-width: 68ch;
}

/* ---------- 下一步 ---------- */
.page-about .about-next {
  background: var(--paper);
  padding-top: 0;
}
.page-about .about-next__panel {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
  padding: clamp(24px, 4vw, 52px);
  background: var(--violet);
  color: var(--white);
}
.page-about .about-next__main .about-kicker {
  color: var(--orange);
}
.page-about .about-next__main .about-kicker::before {
  background: var(--orange);
}
.page-about .about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}
.page-about .about-next__paths-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: var(--fs--1);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.76);
}
.page-about .about-next__paths {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
}
.page-about .about-path {
  padding: 6px 13px;
  font-size: var(--fs-0);
  color: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.46);
  background: rgba(255, 255, 255, 0.08);
}
.page-about .about-next__hint {
  margin: 0;
  font-size: var(--fs-0);
  line-height: 1.78;
  color: rgba(255, 255, 255, 0.8);
}
.page-about .about-next__hint a {
  color: var(--white);
  text-decoration: none;
  border-bottom: 1px solid var(--orange);
  padding-bottom: 1px;
}
.page-about .about-next__hint a:hover {
  border-bottom-color: var(--white);
}

/* ---------- 媒体查询 ---------- */
@media (min-width: 620px) {
  .page-about .about-beats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-reach__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
  }
  .page-about .about-stat {
    padding-left: 16px;
  }
  .page-about .about-stat + .about-stat {
    padding-left: 20px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: end;
  }
  .page-about .about-newsroom__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.82fr);
  }
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 0.86fr) minmax(0, 1fr);
  }
  .page-about .about-cred__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }
  .page-about .about-next__panel {
    grid-template-columns: minmax(0, 1.18fr) minmax(0, 0.82fr);
  }
}

@media (min-width: 980px) {
  .page-about .about-timeline__grid {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
  }
  .page-about .about-timeline__rail {
    position: sticky;
    top: 96px;
    align-self: start;
  }
  .page-about .about-rail__list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
    border-left: 1px solid var(--rule);
  }
  .page-about .about-rail__list li {
    margin-bottom: 6px;
  }
  .page-about .about-rail__link {
    width: 100%;
    padding: 9px 0 9px 14px;
    background: transparent;
    border: 0;
    border-left: 2px solid transparent;
    margin-left: -1px;
  }
  .page-about .about-rail__link:hover,
  .page-about .about-rail__link:focus-visible {
    background: var(--paper-2);
    color: var(--ink);
    border-left-color: var(--violet);
  }
  .page-about .about-rail__link:hover span,
  .page-about .about-rail__link:focus-visible span {
    color: var(--violet);
  }
  .page-about .about-cred__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-era {
    padding-left: 32px;
  }
  .page-about .about-era::after {
    left: -5px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-btn,
  .page-about .about-cert,
  .page-about .about-cert__more,
  .page-about .about-rail__link {
    transition: none;
  }
  .page-about .about-btn:hover {
    transform: none;
  }
}
<<<END>>>