.page-about {
  --about-gap: clamp(20px, 3.2vw, 44px);
  --about-pad-y: clamp(48px, 7vw, 96px);
  --about-hair: var(--rule-color);
  background: var(--bg);
  color: var(--c-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.75;
  overflow-x: hidden;
}

.page-about a:focus-visible,
.page-about summary:focus-visible {
  outline: 2px solid var(--c-orange);
  outline-offset: 3px;
}

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

/* ---------- Hero ---------- */

.page-about .about-hero {
  border-bottom: var(--rule);
  background: var(--bg);
}

.page-about .about-hero__inner {
  max-width: var(--page-max);
  margin-inline: auto;
  padding: clamp(18px, 2.6vw, 30px) var(--gutter) clamp(30px, 5vw, 62px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  margin-top: clamp(20px, 3vw, 38px);
}

.page-about .about-hero__kicker {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  margin: 0 0 clamp(14px, 2vw, 22px);
  padding-top: 10px;
  border-top: 2px solid var(--c-plateau);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  color: var(--c-plateau);
}

.page-about .about-hero__kicker .num {
  font-size: 0.95rem;
  font-weight: 600;
}

.page-about .about-hero__title {
  margin: 0 0 clamp(18px, 2.4vw, 28px);
  max-width: 18ch;
  font-family: var(--font-display);
  font-size: clamp(2rem, 5.2vw, 4.2rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--c-deep);
}

.page-about .about-hero__lede {
  margin: 0 0 clamp(22px, 3vw, 32px);
  max-width: 46ch;
  font-size: clamp(1rem, 1.32vw, 1.125rem);
  line-height: 1.85;
  color: var(--c-rock);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px clamp(12px, 2vw, 18px);
  margin-bottom: clamp(26px, 3.4vw, 38px);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 0;
  padding: 16px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px clamp(20px, 3.4vw, 40px);
  border-top: var(--rule);
}

.page-about .about-hero__fact {
  display: flex;
  align-items: baseline;
  gap: 7px;
}

.page-about .about-hero__fact b {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--c-plateau);
  letter-spacing: -0.01em;
}

.page-about .about-hero__fact span {
  font-size: 0.8rem;
  color: var(--c-rock);
}

.page-about .about-hero__aside-title {
  margin: 0 0 10px;
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--c-clay);
}

.page-about .about-hero__index {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--rule);
}

.page-about .about-hero__index li {
  border-bottom: var(--rule);
}

.page-about .about-hero__index a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 10px 2px;
  font-size: 0.92rem;
  color: var(--c-ink);
  text-decoration: none;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.page-about .about-hero__index a .num {
  font-size: 0.78rem;
  color: var(--c-plateau);
}

.page-about .about-hero__index a:hover {
  padding-left: 8px;
  color: var(--c-deep);
  background: var(--c-cream);
}

.page-about .about-hero__figure {
  margin: 0;
  background: var(--c-deep);
}

.page-about .about-hero__figure::before {
  content: "";
  display: block;
  height: 4px;
  background: linear-gradient(90deg, var(--c-orange) 0 22%, var(--c-plateau) 22% 62%, var(--c-moss) 62% 100%);
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

/* ---------- Section shell ---------- */

.page-about .about-section {
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.page-about .about-section__inner {
  display: grid;
  gap: clamp(24px, 3.4vw, 40px);
  max-width: var(--page-max);
  margin-inline: auto;
  padding: var(--about-pad-y) var(--gutter);
  border-bottom: var(--rule);
}

.page-about .about-section__no {
  width: 64px;
  margin: 0 0 14px;
  padding-top: 10px;
  border-top: 2px solid var(--c-plateau);
  font-size: 0.82rem;
  letter-spacing: 0.18em;
  color: var(--c-plateau);
}

.page-about .about-section__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 2.7vw, 2.15rem);
  font-weight: 700;
  line-height: 1.22;
  color: var(--c-deep);
}

.page-about .about-section__note {
  margin: 0;
  max-width: 34ch;
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--c-rock);
  padding-left: 14px;
  border-left: 1px solid var(--about-hair);
}

/* ---------- Story ---------- */

.page-about .about-body p {
  margin: 0 0 1.1em;
  max-width: 62ch;
  color: var(--c-ink);
}

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

.page-about .about-pull {
  margin: clamp(24px, 3vw, 36px) 0;
  padding: 16px 0 16px 22px;
  border-left: 3px solid var(--c-orange);
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 1.7vw, 1.35rem);
  line-height: 1.65;
  color: var(--c-deep);
}

/* ---------- Team ---------- */

.page-about .about-team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(14px, 2vw, 20px);
}

.page-about .about-team-card {
  display: flex;
  flex-direction: column;
  padding: clamp(18px, 2.4vw, 26px);
  background: var(--surface);
  border: var(--rule);
  border-top: 3px solid var(--c-plateau);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-team-card:nth-child(2) {
  border-top-color: var(--c-orange);
}

.page-about .about-team-card:nth-child(3) {
  border-top-color: var(--c-clay);
}

.page-about .about-team-card:nth-child(4) {
  border-top-color: var(--c-moss);
}

.page-about .about-team-card:hover {
  transform: translateY(-3px);
  border-color: var(--c-plateau);
  box-shadow: 0 12px 26px -20px rgba(8, 76, 88, 0.65);
}

.page-about .about-team-card__no {
  margin: 0 0 10px;
  font-size: 0.75rem;
  letter-spacing: 0.22em;
  color: var(--c-rock);
}

.page-about .about-team-card__name {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 1.2rem;
  line-height: 1.3;
  color: var(--c-deep);
}

.page-about .about-team-card__desc {
  margin: 0 0 16px;
  font-size: 0.92rem;
  line-height: 1.78;
  color: var(--c-rock);
}

.page-about .about-team-card__tag {
  margin: auto 0 0;
  align-self: flex-start;
  padding: 4px 9px;
  font-family: var(--font-num);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  color: var(--c-deep);
  background: var(--c-cream);
  border: 1px solid var(--about-hair);
}

/* ---------- Process ---------- */

.page-about .about-process__list {
  list-style: none;
  margin: 0 0 clamp(24px, 3vw, 36px);
  padding: 0;
}

.page-about .about-process__step {
  display: grid;
  gap: 6px 20px;
  padding-block: clamp(16px, 2.2vw, 24px);
  border-top: var(--rule);
}

.page-about .about-process__step:first-child {
  border-top: 2px solid var(--c-plateau);
}

.page-about .about-process__time {
  margin: 0;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--c-clay);
}

.page-about .about-process__body h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 1.15rem;
  line-height: 1.3;
  color: var(--c-deep);
}

.page-about .about-process__body p {
  margin: 0;
  max-width: 60ch;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--c-rock);
}

/* ---------- Figure ---------- */

.page-about .about-figure {
  margin: 0 0 clamp(26px, 3.4vw, 38px);
  border: var(--rule);
  background: var(--surface);
}

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

.page-about .about-figure figcaption {
  padding: 10px clamp(12px, 1.8vw, 16px);
  border-top: var(--rule);
  font-size: 0.76rem;
  line-height: 1.65;
  color: var(--c-rock);
}

/* ---------- Timeline ---------- */

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 clamp(20px, 3vw, 32px);
  border-left: 1px solid var(--about-hair);
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: clamp(14px, 2vw, 22px);
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  top: 14px;
  left: calc(-1 * clamp(20px, 3vw, 32px) - 3.5px);
  width: 7px;
  height: 7px;
  background: var(--c-orange);
}

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

.page-about .about-timeline__node > summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 14px;
  padding: 3px 0;
  cursor: pointer;
  list-style: none;
}

.page-about .about-timeline__node > summary::-webkit-details-marker {
  display: none;
}

.page-about .about-timeline__node > summary::after {
  content: "展开";
  margin-left: auto;
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--c-plateau);
  border-bottom: 1px solid currentColor;
}

.page-about .about-timeline__node[open] > summary::after {
  content: "收起";
}

.page-about .about-timeline__year {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--c-plateau);
  letter-spacing: 0.02em;
}

.page-about .about-timeline__label {
  font-family: var(--font-display);
  font-size: 1.02rem;
  line-height: 1.4;
  color: var(--c-deep);
}

.page-about .about-timeline__text {
  margin: 10px 0 0;
  max-width: 58ch;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--c-rock);
}

/* ---------- Partners ---------- */

.page-about .about-partners__lead {
  margin: 0 0 clamp(22px, 3vw, 32px);
  max-width: 60ch;
  line-height: 1.85;
}

.page-about .about-partners__honor {
  padding: clamp(18px, 2.4vw, 26px);
  background: var(--c-cream);
  border: var(--rule);
  border-left: 4px solid var(--c-moss);
}

.page-about .about-partners__honor-label {
  margin: 0 0 8px;
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--c-moss);
}

.page-about .about-partners__honor-text {
  margin: 0;
  max-width: 56ch;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--c-ink);
}

.page-about .about-partners__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px clamp(18px, 3vw, 34px);
  margin-top: clamp(22px, 3vw, 32px);
  padding-top: 16px;
  border-top: var(--rule);
}

.page-about .about-partners__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  font-size: 0.92rem;
  color: var(--c-plateau);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-partners__link:hover {
  color: var(--c-orange);
  border-bottom-color: currentColor;
}

/* ---------- Contact ---------- */

.page-about .about-contact {
  background: var(--c-plateau);
  color: var(--c-cream);
}

.page-about .about-contact .about-section__inner {
  border-bottom: 0;
}

.page-about .about-contact .about-section__no {
  border-top-color: var(--c-orange);
  color: var(--c-cream);
}

.page-about .about-contact .about-section__title {
  color: var(--c-cream);
}

.page-about .about-contact .about-section__note {
  color: rgba(251, 247, 238, 0.78);
  border-left-color: rgba(251, 247, 238, 0.35);
}

.page-about .about-contact__list {
  list-style: none;
  margin: 0 0 clamp(24px, 3vw, 34px);
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid rgba(251, 247, 238, 0.28);
}

.page-about .about-contact__item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 18px;
  padding: 13px 0;
  border-bottom: 1px solid rgba(251, 247, 238, 0.28);
}

.page-about .about-contact__label {
  min-width: 5.5em;
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  color: rgba(251, 247, 238, 0.7);
}

.page-about .about-contact__value {
  font-family: var(--font-num);
  font-size: 0.98rem;
  letter-spacing: 0.01em;
  color: var(--c-cream);
  word-break: break-word;
}

.page-about .about-contact__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px clamp(18px, 3vw, 30px);
}

.page-about .about-contact__textlink {
  font-size: 0.9rem;
  color: var(--c-cream);
  text-decoration: none;
  border-bottom: 1px solid rgba(251, 247, 238, 0.55);
  padding-bottom: 2px;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-contact__textlink:hover {
  color: #ffffff;
  border-bottom-color: #ffffff;
}

/* ---------- Responsive ---------- */

@media (min-width: 640px) {
  .page-about .about-team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-process__step {
    grid-template-columns: 148px minmax(0, 1fr);
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
    gap: clamp(32px, 5vw, 76px);
  }

  .page-about .about-hero__aside {
    padding-bottom: 6px;
  }

  .page-about .about-section__inner {
    grid-template-columns: minmax(0, 268px) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 84px);
    align-items: start;
  }

  .page-about .about-section__head {
    position: sticky;
    top: calc(var(--header-h) + 32px);
  }

  .page-about .about-contact__item {
    gap: 4px 26px;
  }
}

@media (max-width: 420px) {
  .page-about .about-hero__title {
    font-size: clamp(1.72rem, 8vw, 2.4rem);
  }

  .page-about .about-hero__facts {
    gap: 8px 16px;
  }

  .page-about .about-contact__label {
    min-width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-team-card,
  .page-about .about-hero__index a,
  .page-about .about-partners__link,
  .page-about .about-contact__textlink {
    transition-duration: 0.01ms;
  }

  .page-about .about-team-card:hover {
    transform: none;
  }
}
<<<END>>>