.page-about {
  --about-pad: clamp(2.25rem, 6vw, 4.5rem);
  --about-rule: 2px solid var(--line);
  color: var(--paper);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-about .about-crumb-row {
  padding-top: clamp(1rem, 3vw, 1.75rem);
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1.1;
  margin: 0;
}

.page-about h1 {
  font-size: clamp(2rem, 7.2vw, 3.6rem);
}

.page-about h2 {
  font-size: clamp(1.5rem, 4.4vw, 2.3rem);
}

.page-about h3 {
  font-size: clamp(1.05rem, 2.4vw, 1.3rem);
  letter-spacing: -0.02em;
}

.page-about p {
  margin: 0;
  line-height: 1.78;
}

.page-about .mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(1.5rem, 4vw, 2.5rem) 0 var(--about-pad);
  isolation: isolate;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: min(78%, 660px);
  height: min(70%, 480px);
  background:
    linear-gradient(135deg, rgba(25, 195, 216, 0.22), rgba(31, 191, 143, 0.1) 58%, rgba(7, 28, 44, 0) 100%);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 16% 74%);
  z-index: -1;
  pointer-events: none;
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(1.75rem, 4vw, 2.75rem);
  align-items: start;
}

.page-about .about-hero__text > * + * {
  margin-top: clamp(0.9rem, 2vw, 1.3rem);
}

.page-about .about-hero__text .eyebrow {
  color: var(--gold);
}

.page-about .about-hero__text .lead {
  max-width: 34em;
  color: var(--paper);
  font-size: clamp(1rem, 2.2vw, 1.12rem);
  opacity: 0.92;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
  margin: 0;
  padding-top: 0.5rem;
}

.page-about .about-fact {
  border-top: 2px solid var(--line-strong);
  padding-top: 0.55rem;
}

.page-about .about-fact dt {
  font-size: 0.78rem;
  color: var(--mist);
  letter-spacing: 0.06em;
}

.page-about .about-fact dd {
  margin: 0.15rem 0 0;
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 700;
  color: var(--cyan);
  line-height: 1;
}

.page-about .about-fact:nth-child(2) dd {
  color: var(--green);
}

.page-about .about-fact:nth-child(3) dd {
  color: var(--gold);
}

.page-about .about-fact:nth-child(4) dd {
  color: var(--paper);
}

.page-about .about-hero__figure {
  margin: 0;
  border: 2px solid var(--line-strong);
  box-shadow: var(--shadow);
  background: var(--panel);
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 7 / 5;
}

.page-about .about-hero__figure figcaption {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  color: var(--mist);
  padding: 0.6rem 0.8rem;
  border-top: 2px solid var(--line);
}

/* ---------- 名字与视觉 ---------- */
.page-about .about-origin {
  padding: var(--about-pad) 0;
  border-top: var(--about-rule);
  background: linear-gradient(180deg, rgba(14, 107, 168, 0.12), rgba(7, 28, 44, 0));
}

.page-about .about-origin__grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
}

.page-about .about-origin__kicker {
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  color: var(--mist);
  text-transform: uppercase;
  margin-bottom: 0.7rem;
}

.page-about .about-origin__quote h2 {
  color: var(--paper);
}

.page-about .about-origin__pull {
  margin-top: 1.1rem;
  padding-left: 1rem;
  border-left: 4px solid var(--gold);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1rem, 2.6vw, 1.18rem);
  line-height: 1.7;
  letter-spacing: -0.01em;
  color: var(--gold);
}

.page-about .about-origin__body {
  color: rgba(243, 247, 244, 0.9);
}

.page-about .about-origin__body p + p {
  margin-top: 1rem;
}

/* ---------- 三条做法 ---------- */
.page-about .about-principles {
  padding: var(--about-pad) 0;
  border-top: var(--about-rule);
}

.page-about .about-principles .section-head,
.page-about .about-timeline .section-head,
.page-about .about-serve .section-head,
.page-about .about-team .section-head {
  display: grid;
  gap: 0.75rem;
  margin-bottom: clamp(1.4rem, 3.5vw, 2.2rem);
}

.page-about .about-principles__note,
.page-about .about-serve__note,
.page-about .about-team__note {
  color: var(--mist);
  font-size: 0.95rem;
  max-width: 48em;
}

.page-about .about-principles__grid {
  display: grid;
  gap: 1rem;
}

.page-about .about-principle {
  background: var(--panel);
  border: 2px solid var(--line-strong);
  border-left-width: 6px;
  padding: clamp(1.1rem, 3vw, 1.5rem);
  box-shadow: var(--shadow);
}

.page-about .about-principle--cyan {
  border-left-color: var(--cyan);
}

.page-about .about-principle--green {
  border-left-color: var(--green);
}

.page-about .about-principle--gold {
  border-left-color: var(--gold);
}

.page-about .about-principle__no {
  font-size: 0.85rem;
  letter-spacing: 0.14em;
  color: var(--mist);
  margin-bottom: 0.5rem;
}

.page-about .about-principle h3 {
  margin-bottom: 0.6rem;
}

.page-about .about-principle p:last-child {
  font-size: 0.94rem;
  color: rgba(243, 247, 244, 0.86);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  padding: var(--about-pad) 0;
  border-top: var(--about-rule);
  background: linear-gradient(180deg, rgba(3, 18, 28, 0.55), rgba(10, 36, 54, 0.2));
}

.page-about .about-timeline__hint {
  font-size: 0.78rem;
  color: var(--gold);
  letter-spacing: 0.08em;
}

.page-about .about-timeline__shell {
  padding-left: 0;
  padding-right: 0;
}

.page-about .about-timeline__track {
  list-style: none;
  display: flex;
  gap: 1rem;
  margin: 0;
  padding: 0.35rem clamp(1rem, 4vw, 1.5rem) 1.5rem;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-node {
  flex: 0 0 min(78vw, 288px);
  scroll-snap-align: start;
  background: var(--ink);
  border: 2px solid var(--line-strong);
  border-top-width: 6px;
  padding: 1rem 1rem 1.2rem;
  box-shadow: var(--shadow);
}

.page-about .about-node--blue {
  border-top-color: var(--blue);
}

.page-about .about-node--cyan {
  border-top-color: var(--cyan);
}

.page-about .about-node--green {
  border-top-color: var(--green);
}

.page-about .about-node--violet {
  border-top-color: var(--violet);
}

.page-about .about-node--gold {
  border-top-color: var(--gold);
}

.page-about .about-node__year {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--cyan);
  margin-bottom: 0.4rem;
}

.page-about .about-node--green .about-node__year {
  color: var(--green);
}

.page-about .about-node--gold .about-node__year {
  color: var(--gold);
}

.page-about .about-node--violet .about-node__year {
  color: var(--violet);
}

.page-about .about-node h3 {
  font-size: 1.02rem;
  margin-bottom: 0.5rem;
}

.page-about .about-node p:last-child {
  font-size: 0.9rem;
  color: rgba(243, 247, 244, 0.82);
}

.page-about .about-timeline__figure {
  margin-top: 0.5rem;
}

.page-about .about-timeline__figure figure {
  margin: 0;
  border: 2px solid var(--line-strong);
  box-shadow: var(--shadow);
  background: var(--panel);
}

.page-about .about-timeline__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 16 / 7;
}

.page-about .about-timeline__figure figcaption {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  color: var(--mist);
  padding: 0.6rem 0.8rem;
  border-top: 2px solid var(--line);
}

/* ---------- 服务人群 ---------- */
.page-about .about-serve {
  padding: var(--about-pad) 0;
  border-top: var(--about-rule);
}

.page-about .about-serve__grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.5rem);
}

.page-about .about-serve__figure {
  margin: 0;
  border: 2px solid var(--line-strong);
  box-shadow: var(--shadow);
  background: var(--panel);
  align-self: start;
}

.page-about .about-serve__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

.page-about .about-serve__figure figcaption {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  color: var(--green);
  padding: 0.6rem 0.8rem;
  border-top: 2px solid var(--line);
}

.page-about .about-serve__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .about-serve-item {
  padding: 1rem 0 1.1rem;
  border-top: 2px solid var(--line);
}

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

.page-about .about-serve-item__device {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--gold);
  margin-bottom: 0.35rem;
}

.page-about .about-serve-item h3 {
  font-size: 1.05rem;
  margin-bottom: 0.4rem;
}

.page-about .about-serve-item p:last-child {
  font-size: 0.93rem;
  color: rgba(243, 247, 244, 0.84);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding: var(--about-pad) 0;
  border-top: var(--about-rule);
  background: linear-gradient(180deg, rgba(31, 191, 143, 0.08), rgba(7, 28, 44, 0));
}

.page-about .about-team__grid {
  display: grid;
  gap: 0.85rem;
}

.page-about .about-team-card {
  border: 2px solid var(--line-strong);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.page-about .about-team-card[open] {
  border-color: var(--green);
}

.page-about .about-team-card summary {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  padding: 0.9rem 1rem;
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 2.4rem;
}

.page-about .about-team-card summary::-webkit-details-marker {
  display: none;
}

.page-about .about-team-card summary::after {
  content: "+";
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 1.2rem;
  color: var(--cyan);
  line-height: 1;
}

.page-about .about-team-card[open] summary::after {
  content: "−";
  color: var(--green);
}

.page-about .about-team-card__no {
  font-size: 0.8rem;
  color: var(--mist);
}

.page-about .about-team-card__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.02rem;
  letter-spacing: -0.02em;
}

.page-about .about-team-card__body {
  padding: 0 1rem 1.1rem;
  border-top: 1px dashed var(--line);
  margin-top: 0;
}

.page-about .about-team-card__body p {
  padding-top: 0.8rem;
  font-size: 0.93rem;
  color: rgba(243, 247, 244, 0.85);
}

.page-about .about-rhythm {
  margin-top: clamp(1.4rem, 3.5vw, 2rem);
  display: grid;
  gap: 0.75rem;
}

.page-about .about-rhythm__item {
  border: 2px solid var(--line-strong);
  border-left: 6px solid var(--cyan);
  padding: 0.85rem 1rem;
  background: var(--ink);
}

.page-about .about-rhythm__item:nth-child(2) {
  border-left-color: var(--green);
}

.page-about .about-rhythm__item:nth-child(3) {
  border-left-color: var(--gold);
}

.page-about .about-rhythm__cycle {
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  color: var(--gold);
  margin-bottom: 0.3rem;
}

.page-about .about-rhythm__item p:last-child {
  font-size: 0.92rem;
  color: rgba(243, 247, 244, 0.86);
}

/* ---------- 审校协作 ---------- */
.page-about .about-review {
  padding: var(--about-pad) 0;
  border-top: var(--about-rule);
}

.page-about .about-review__grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
}

.page-about .about-review__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.page-about .about-review__body {
  color: rgba(243, 247, 244, 0.9);
}

.page-about .about-review__body p + p {
  margin-top: 0.9rem;
}

/* ---------- 收束 ---------- */
.page-about .about-cta {
  padding: 0 0 var(--about-pad);
}

.page-about .about-cta__panel {
  display: grid;
  gap: 1.25rem;
  padding: clamp(1.25rem, 4vw, 2.2rem);
  border: 2px solid var(--gold);
  background:
    linear-gradient(120deg, rgba(244, 185, 66, 0.14), rgba(25, 195, 216, 0.1) 62%, rgba(7, 28, 44, 0.2));
  box-shadow: var(--shadow);
}

.page-about .about-cta__panel h2 {
  margin-top: 0.5rem;
  margin-bottom: 0.6rem;
}

.page-about .about-cta__panel p {
  font-size: 0.95rem;
  color: rgba(243, 247, 244, 0.9);
  max-width: 52em;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  align-items: flex-start;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

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

  .page-about .about-cta__panel {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: end;
  }

  .page-about .about-cta__actions {
    flex-direction: column;
    align-items: stretch;
  }
}

@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-origin__grid {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    align-items: start;
  }

  .page-about .about-principles .section-head,
  .page-about .about-timeline .section-head,
  .page-about .about-serve .section-head,
  .page-about .about-team .section-head {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr);
    align-items: end;
  }

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

  .page-about .about-node {
    flex-basis: 300px;
  }

  .page-about .about-serve__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
  }

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

  .page-about .about-review__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-team-card summary::after {
    transition: none;
  }
}
<<<PAGE_CSS_END>>>