.page-about .about-hero {
  padding: 8px 0 32px;
}

.page-about .about-hero__grid {
  align-items: start;
  row-gap: 28px;
}

.page-about .about-hero__title {
  margin: 10px 0 14px;
  letter-spacing: -0.02em;
  line-height: 1.08;
}

.page-about .about-hero__lede {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--tb-ink);
  max-width: 60ch;
  margin: 0 0 18px;
}

.page-about .about-hero__points {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .about-hero__points li {
  position: relative;
  padding-left: 18px;
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--tb-ink);
}

.page-about .about-hero__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  background: var(--tb-orange);
  border-radius: 1px;
}

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

.page-about .about-hero__figure {
  border: 1px solid var(--tb-line);
  border-radius: var(--tb-radius);
  overflow: hidden;
  background: var(--tb-paper);
  aspect-ratio: 14 / 9;
}

.page-about .about-hero__figure .tb-media__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.page-about .about-hero__cap {
  margin: 10px 0 0;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--tb-slate);
}

.page-about .about-hero__cap .tb-num {
  color: var(--tb-navy);
  font-weight: 700;
}

.page-about .about-figures {
  background: var(--tb-panel);
  padding: 22px 0;
}

.page-about .about-figures__inner {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 16px;
}

.page-about .about-figure {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-left: 14px;
  border-left: 2px solid rgba(200, 240, 74, 0.45);
}

.page-about .about-figure__num {
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--tb-paper);
  letter-spacing: -0.01em;
}

.page-about .about-figure__label {
  color: var(--tb-lime);
}

.page-about .about-core {
  padding: 40px 0 8px;
}

.page-about .about-core .tb-grid {
  row-gap: 32px;
  align-items: start;
}

.page-about .about-core__main > .tb-h2 {
  margin-top: 0;
}

.page-about .about-core__main .tb-h2 {
  margin-bottom: 12px;
  line-height: 1.2;
}

.page-about .about-prose p {
  margin: 0 0 14px;
  line-height: 1.8;
}

.page-about .about-core__intro {
  margin: 0 0 24px;
  color: var(--tb-ink);
  line-height: 1.75;
  max-width: 60ch;
}

.page-about .about-core__main .tb-rule {
  margin: 28px 0;
}

/* 时间线 */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-node {
  position: relative;
  padding: 0 0 26px 26px;
  border-left: 1px solid var(--tb-line);
}

.page-about .about-node:last-child {
  padding-bottom: 6px;
  border-left-color: transparent;
}

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 9px;
  width: 9px;
  height: 9px;
  background: var(--tb-cream);
  border: 2px solid var(--tb-orange);
  border-radius: 50%;
}

.page-about .about-node__year {
  display: inline-block;
  padding: 2px 10px;
  background: var(--tb-ink);
  color: var(--tb-cream);
  font-size: 0.8125rem;
  font-weight: 700;
  border-radius: 2px;
  letter-spacing: 0.04em;
}

.page-about .about-node__title {
  margin: 10px 0 6px;
  font-size: 1.0625rem;
  line-height: 1.4;
}

.page-about .about-node__text {
  margin: 0;
  line-height: 1.75;
  color: var(--tb-ink);
}

.page-about .about-node__more {
  margin-top: 6px;
}

.page-about .about-node__more > summary {
  list-style: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 44px;
  padding: 4px 0;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--tb-blue);
}

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

.page-about .about-node__more > summary::before {
  content: "+";
  font-family: var(--tb-font-mono);
  font-size: 0.9375rem;
  line-height: 1;
}

.page-about .about-node__more[open] > summary::before {
  content: "\2212";
}

.page-about .about-node__more > summary:focus-visible {
  outline: 2px solid var(--tb-blue);
  outline-offset: 3px;
}

.page-about .about-node__more p {
  margin: 4px 0 0;
  padding: 12px 14px;
  background: var(--tb-paper);
  border-left: 2px solid var(--tb-line);
  border-radius: 0 2px 2px 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--tb-ink);
}

/* 侧栏档案卡 */
.page-about .about-aside {
  min-width: 0;
}

.page-about .about-dossier {
  padding: 18px 18px 20px;
}

.page-about .about-dossier__title {
  margin: 8px 0 8px;
  font-size: 1.0625rem;
}

.page-about .about-dossier__text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--tb-ink);
}

.page-about .about-dossier .tb-rule {
  margin: 16px 0;
}

.page-about .about-dossier__list {
  margin: 0;
  padding: 0;
}

.page-about .about-dossier__row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 0;
  border-bottom: 1px dashed var(--tb-line);
}

.page-about .about-dossier__row:last-child {
  border-bottom: 0;
}

.page-about .about-dossier__row dt {
  font-size: 0.8125rem;
  color: var(--tb-slate);
  letter-spacing: 0.02em;
  flex: 0 0 auto;
}

.page-about .about-dossier__row dd {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.5;
  text-align: right;
  color: var(--tb-ink);
}

.page-about .about-dossier__row dd .tb-num {
  font-weight: 700;
  color: var(--tb-navy);
}

.page-about .about-dossier__btn {
  display: block;
  margin-top: 18px;
  text-align: center;
}

.page-about .about-aside__note {
  margin: 14px 0 0;
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--tb-slate);
}

.page-about .about-aside__note a {
  color: var(--tb-blue);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.page-about .about-aside__note a:focus-visible {
  outline: 2px solid var(--tb-blue);
  outline-offset: 2px;
}

/* 团队 */
.page-about .about-team {
  padding-top: 32px;
}

.page-about .about-team__grid {
  row-gap: 26px;
  align-items: start;
}

.page-about .about-team .tb-h2,
.page-about .about-cadence .tb-h2,
.page-about .about-partners .tb-h2,
.page-about .about-principles .tb-h2 {
  margin: 8px 0 12px;
  line-height: 1.2;
}

.page-about .about-team__intro,
.page-about .about-cadence__intro,
.page-about .about-partners__intro,
.page-about .about-principles__intro {
  margin: 0 0 22px;
  line-height: 1.75;
  color: var(--tb-ink);
  max-width: 62ch;
}

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

.page-about .about-crew__item {
  display: flex;
  gap: 14px;
  padding: 16px 0;
  border-bottom: 1px solid var(--tb-line);
}

.page-about .about-crew__tag {
  flex: 0 0 auto;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--tb-orange);
  padding-top: 3px;
  letter-spacing: 0.06em;
}

.page-about .about-crew__body h3 {
  margin: 0 0 5px;
  font-size: 1rem;
}

.page-about .about-crew__body p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--tb-ink);
}

.page-about .about-team__figure,
.page-about .about-cadence__figure {
  border: 1px solid var(--tb-line);
  border-radius: var(--tb-radius);
  overflow: hidden;
  background: var(--tb-paper);
}

.page-about .about-team__figure .tb-media__img,
.page-about .about-cadence__figure .tb-media__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.page-about .about-media-cap {
  margin: 10px 0 0;
  font-size: 0.8125rem;
  line-height: 1.65;
  color: var(--tb-slate);
}

/* 节奏 */
.page-about .about-cadence {
  padding-top: 32px;
}

.page-about .about-cadence__grid {
  row-gap: 26px;
  align-items: start;
}

.page-about .about-cadence__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-cadence__row {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 0;
  border-top: 1px dashed var(--tb-line);
}

.page-about .about-cadence__row:last-child {
  border-bottom: 1px dashed var(--tb-line);
}

.page-about .about-cadence__k {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--tb-navy);
  letter-spacing: 0.01em;
}

.page-about .about-cadence__v {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--tb-ink);
}

/* 服务对象 */
.page-about .about-partners {
  padding-top: 32px;
}

.page-about .about-partners__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .about-partner {
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .about-partner h3 {
  margin: 0;
  font-size: 1rem;
  color: var(--tb-navy);
}

.page-about .about-partner p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--tb-ink);
}

.page-about .about-partner__meta {
  margin-top: auto;
  padding-top: 8px;
  border-top: 1px solid var(--tb-line);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--tb-slate);
}

/* 原则 */
.page-about .about-principles {
  padding-top: 32px;
}

.page-about .about-principles__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .about-principles__item {
  padding: 16px 18px 18px;
  background: var(--tb-paper);
  border: 1px solid var(--tb-line);
  border-radius: var(--tb-radius);
  border-top: 3px solid var(--tb-navy);
}

.page-about .about-principles__num {
  display: block;
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--tb-orange);
  margin-bottom: 6px;
}

.page-about .about-principles__item h3 {
  margin: 0 0 6px;
  font-size: 1.0625rem;
}

.page-about .about-principles__item p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--tb-ink);
}

/* 收尾 */
.page-about .about-cta {
  margin-top: 36px;
  background: var(--tb-navy);
  padding: 32px 0;
}

.page-about .about-cta__inner {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.page-about .about-cta__title {
  margin: 0 0 8px;
  color: var(--tb-paper);
  font-size: clamp(1.375rem, 3.2vw, 1.875rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.page-about .about-cta__text p {
  margin: 0;
  color: rgba(246, 239, 223, 0.86);
  font-size: 0.9375rem;
  line-height: 1.75;
  max-width: 58ch;
}

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

@media (min-width: 640px) {
  .page-about .about-figures__inner {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 8px;
  }

  .page-about .about-figure__num {
    font-size: 1.75rem;
  }

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

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

  .page-about .about-cta__inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }

  .page-about .about-cta__actions {
    flex: 0 0 auto;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 20px 0 44px;
  }

  .page-about .about-hero__grid {
    column-gap: 32px;
    align-items: center;
  }

  .page-about .about-hero__lede {
    font-size: 1.0625rem;
  }

  .page-about .about-aside__sticky {
    position: sticky;
    top: 128px;
  }

  .page-about .about-core {
    padding-top: 52px;
  }

  .page-about .about-core .tb-grid {
    column-gap: 36px;
  }

  .page-about .about-team,
  .page-about .about-cadence,
  .page-about .about-partners,
  .page-about .about-principles {
    padding-top: 44px;
  }

  .page-about .about-team__grid,
  .page-about .about-cadence__grid {
    column-gap: 36px;
    align-items: center;
  }

  .page-about .about-cta {
    margin-top: 52px;
    padding: 44px 0;
  }
}

@media (min-width: 1100px) {
  .page-about .about-node__text,
  .page-about .about-prose p {
    max-width: 66ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-dossier__btn,
  .page-about .about-hero__figure,
  .page-about .about-node__more > summary {
    transition: none;
  }
}
<<<END>>>