.page-about {
  --about-pad: clamp(56px, 8vw, 112px);
  --about-tl: clamp(20px, 4vw, 44px);
  --about-muted: #46535E;
  --about-hair: rgba(195, 205, 210, 0.24);
  background: var(--paper);
  color: var(--ink);
  overflow-x: clip;
}

.page-about .coord {
  position: static;
  display: inline-block;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--teal);
}

.page-about .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.page-about .about-crumb {
  margin: clamp(14px, 2.4vw, 24px) 0 clamp(10px, 1.6vw, 16px);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  background: var(--night);
  color: var(--paper);
  padding: clamp(36px, 6vw, 76px) 0 clamp(44px, 7vw, 96px);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(195, 205, 210, 0.09) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(195, 205, 210, 0.09) 1px, transparent 1px);
  background-size: 96px 96px;
}

.page-about .about-hero .coord {
  color: var(--teal-soft);
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(32px, 5vw, 60px);
}

.page-about .about-hero__text {
  position: relative;
  min-width: 0;
}

.page-about .about-hero__eyebrow {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--teal-soft);
}

.page-about .about-hero__title {
  margin: 0 0 24px;
  font-size: clamp(32px, 6vw, 72px);
  line-height: 1.08;
  font-weight: 900;
  letter-spacing: -0.025em;
  color: var(--paper);
  overflow-wrap: break-word;
}

.page-about .about-hero__title span {
  display: block;
  color: var(--orange);
}

.page-about .about-hero__lead {
  margin: 0;
  max-width: 44ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
  color: var(--num-light);
}

.page-about .about-hero__side {
  display: none;
  margin: 0;
  writing-mode: vertical-rl;
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--teal-soft);
}

.page-about .about-hero__meta {
  list-style: none;
  margin: 32px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--about-hair);
  display: flex;
  flex-wrap: wrap;
  gap: 10px 30px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--teal-soft);
}

.page-about .about-hero__meta .num {
  margin-right: 3px;
  font-size: 19px;
  color: var(--paper);
}

.page-about .about-hero__figure {
  margin: 0;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid rgba(195, 205, 210, 0.3);
  filter: saturate(0.82) contrast(1.03);
}

.page-about .about-hero__figure .figure__cap {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--teal-soft);
}

/* ---------- 为什么 ---------- */

.page-about .about-why {
  padding: var(--about-pad) 0;
  background: var(--paper);
}

.page-about .about-why__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 40px);
}

.page-about .about-why__side {
  border-top: 1px solid var(--ink);
  padding-top: 14px;
}

.page-about .about-why__kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--teal);
}

.page-about .about-why__body h2 {
  margin: 0 0 22px;
  max-width: 20ch;
  font-size: clamp(26px, 3.8vw, 42px);
  line-height: 1.22;
  font-weight: 900;
  letter-spacing: -0.02em;
}

.page-about .about-why__body p {
  margin: 0 0 18px;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--about-muted);
}

.page-about .about-why__points {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  max-width: 60ch;
  border-top: 1px solid var(--line);
}

.page-about .about-why__points li {
  position: relative;
  padding: 13px 0 13px 22px;
  border-bottom: 1px solid var(--line);
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--ink);
}

.page-about .about-why__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22px;
  width: 10px;
  height: 2px;
  background: var(--orange);
}

/* ---------- 时间线 ---------- */

.page-about .about-time {
  padding: var(--about-pad) 0;
  background: var(--mid);
}

.page-about .about-time__head {
  max-width: 54ch;
  margin-bottom: clamp(30px, 4vw, 54px);
}

.page-about .about-time__head h2 {
  margin: 0 0 16px;
  font-size: clamp(26px, 3.8vw, 42px);
  line-height: 1.22;
  font-weight: 900;
  letter-spacing: -0.02em;
}

.page-about .about-time__intro {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-muted);
}

.page-about .tl {
  list-style: none;
  margin: 0;
  padding: 0 0 0 var(--about-tl);
  border-left: 1px solid var(--teal);
}

.page-about .tl__item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding-bottom: clamp(26px, 3.6vw, 44px);
}

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

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--about-tl) - 5px);
  top: 0.7em;
  width: 9px;
  height: 9px;
  background: var(--paper);
  border: 2px solid var(--teal);
}

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

.page-about .tl__year {
  margin: 0;
  font-size: clamp(20px, 2.4vw, 26px);
  letter-spacing: -0.02em;
  color: var(--teal);
}

.page-about .tl__item--now .tl__year {
  color: var(--orange-deep);
}

.page-about .tl__title {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0 0 8px;
  font-size: clamp(17px, 1.9vw, 21px);
  line-height: 1.4;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-about .tl__text {
  margin: 0;
  max-width: 58ch;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--about-muted);
}

.page-about .tl__title .tag {
  font-size: 10px;
  letter-spacing: 0.1em;
  padding: 2px 6px;
}

/* ---------- 流程 ---------- */

.page-about .about-flow {
  padding: var(--about-pad) 0;
  background: var(--paper);
}

.page-about .about-flow__head {
  max-width: 56ch;
  margin-bottom: clamp(28px, 4vw, 48px);
}

.page-about .about-flow__head h2 {
  margin: 0 0 16px;
  font-size: clamp(26px, 3.8vw, 42px);
  line-height: 1.22;
  font-weight: 900;
  letter-spacing: -0.02em;
}

.page-about .about-flow__intro {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-muted);
}

.page-about .flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .flow__step {
  background: var(--paper);
  padding: 18px 18px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: background-color 0.18s linear;
}

.page-about .flow__no {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--orange-deep);
}

.page-about .flow__title {
  margin: 0;
  font-size: 16px;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-about .flow__text {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--about-muted);
}

.page-about .flow__note {
  margin: 0;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  font-size: 12px;
  line-height: 1.65;
  color: var(--teal);
  transition: max-height 0.24s ease, opacity 0.18s linear;
}

.page-about .flow__step:hover .flow__note,
.page-about .flow__step:focus-within .flow__note {
  max-height: 140px;
  opacity: 1;
}

.page-about .about-flow__figure {
  margin: clamp(28px, 4vw, 44px) 0 0;
}

.page-about .about-flow__figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  filter: saturate(0.85);
}

.page-about .about-flow__figure .figure__cap {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--about-muted);
}

/* ---------- 团队 ---------- */

.page-about .about-team {
  padding: var(--about-pad) 0;
  background: var(--night);
  color: var(--paper);
}

.page-about .about-team .coord {
  color: var(--teal-soft);
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(32px, 5vw, 64px);
}

.page-about .about-team h2 {
  margin: 0 0 18px;
  font-size: clamp(26px, 3.8vw, 42px);
  line-height: 1.22;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-team__text {
  margin: 0;
  max-width: 44ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--num-light);
}

.page-about .about-team__big {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-team__num {
  font-size: clamp(56px, 9vw, 92px);
  line-height: 0.9;
  letter-spacing: -0.05em;
  color: var(--num-light);
}

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

.page-about .about-team__roles {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--about-hair);
}

.page-about .role {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 18px 0;
  border-bottom: 1px solid var(--about-hair);
}

.page-about .role__num {
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--orange);
}

.page-about .role__name {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .role__desc {
  margin: 0;
  max-width: 46ch;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--num-light);
}

/* ---------- 服务对象 ---------- */

.page-about .about-who {
  padding: var(--about-pad) 0;
  background: var(--paper);
}

.page-about .about-who__head {
  max-width: 56ch;
  margin-bottom: clamp(28px, 4vw, 48px);
}

.page-about .about-who__head h2 {
  margin: 0 0 16px;
  font-size: clamp(26px, 3.8vw, 42px);
  line-height: 1.22;
  font-weight: 900;
  letter-spacing: -0.02em;
}

.page-about .about-who__intro {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-muted);
}

.page-about .who {
  border-top: 1px solid var(--ink);
}

.page-about .who__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: clamp(18px, 2.6vw, 26px) 0;
  border-bottom: 1px solid var(--line);
}

.page-about .who__no {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--teal);
}

.page-about .who__title {
  margin: 0;
  font-size: clamp(17px, 1.9vw, 20px);
  line-height: 1.4;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-about .who__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--about-muted);
}

/* ---------- 覆盖范围 ---------- */

.page-about .about-reach {
  padding: var(--about-pad) 0;
  background: var(--mid);
}

.page-about .about-reach__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 52px);
}

.page-about .about-reach h2 {
  margin: 0 0 18px;
  font-size: clamp(26px, 3.8vw, 42px);
  line-height: 1.22;
  font-weight: 900;
  letter-spacing: -0.02em;
}

.page-about .about-reach__body p {
  margin: 0 0 16px;
  max-width: 54ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--about-muted);
}

.page-about .about-reach__body a {
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid var(--teal-soft);
}

.page-about .about-reach__body a:hover,
.page-about .about-reach__body a:focus-visible {
  color: var(--orange-deep);
  border-bottom-color: var(--orange-deep);
}

.page-about .about-reach__stats {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin: 26px 0 0;
  border-top: 1px solid rgba(19, 28, 36, 0.22);
}

.page-about .about-reach__stats > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(19, 28, 36, 0.16);
}

.page-about .about-reach__stats dt {
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--about-muted);
}

.page-about .about-reach__stats dd {
  margin: 0;
  font-size: clamp(24px, 3vw, 32px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--night);
}

.page-about .about-reach__stats dd span {
  margin-left: 3px;
  font-family: var(--font-sans);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--about-muted);
}

.page-about .about-reach__figure {
  margin: 0;
}

.page-about .about-reach__figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid rgba(19, 28, 36, 0.14);
  filter: saturate(0.85);
}

.page-about .about-reach__figure .figure__cap {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--about-muted);
}

/* ---------- 下一步 ---------- */

.page-about .about-next {
  padding: clamp(40px, 6vw, 78px) 0;
  background: var(--paper);
  border-top: 1px solid var(--line);
}

.page-about .about-next__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 36px);
  align-items: end;
}

.page-about .about-next h2 {
  margin: 0 0 12px;
  font-size: clamp(23px, 3vw, 32px);
  line-height: 1.28;
  font-weight: 900;
  letter-spacing: -0.018em;
}

.page-about .about-next__text {
  margin: 0;
  max-width: 48ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-muted);
}

.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 断点 ---------- */

@media (min-width: 700px) {
  .page-about .tl__item {
    grid-template-columns: 92px minmax(0, 1fr);
    column-gap: clamp(16px, 3vw, 36px);
    align-items: start;
  }

  .page-about .who__row {
    grid-template-columns: 56px minmax(0, 220px) minmax(0, 1fr);
    gap: clamp(12px, 2vw, 28px);
    align-items: baseline;
  }

  .page-about .about-reach__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 clamp(14px, 2vw, 26px);
  }

  .page-about .about-reach__stats > div {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    border-bottom: none;
    border-top: 1px solid rgba(19, 28, 36, 0.22);
    padding: 12px 0 0;
  }

  .page-about .about-next__inner {
    grid-template-columns: minmax(0, 1fr) auto;
  }
}

@media (min-width: 880px) {
  .page-about .flow {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .flow__step:hover {
    background: var(--mid);
  }

  .page-about .about-why__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: clamp(28px, 4vw, 56px);
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-about .about-reach__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }
}

@media (min-width: 1100px) {
  .page-about .about-hero__side {
    display: block;
    position: absolute;
    top: 0;
    right: -38px;
  }
}

@media (hover: none) {
  .page-about .flow__note {
    max-height: none;
    opacity: 1;
  }
}

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