.page-about {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-about .about-hero {
  padding-block: clamp(1.8rem, 4vw, 3rem) clamp(2.4rem, 5vw, 3.8rem);
  background:
    radial-gradient(120% 90% at 90% 0%, rgba(201, 169, 106, .18), transparent 62%),
    var(--paper);
}

.page-about .about-hero__inner {
  display: grid;
  gap: clamp(1.6rem, 4vw, 2.8rem);
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: end;
  }
}

.page-about .about-hero__text {
  display: grid;
  gap: 0.8rem;
  align-content: start;
}

.page-about .about-hero h1 {
  font-family: var(--font-title);
  font-weight: 400;
  font-size: clamp(2rem, 4.4vw, 3.3rem);
  line-height: 1.24;
  letter-spacing: -0.01em;
  margin: 0;
  max-width: 20ch;
  color: var(--ink);
}

.page-about .about-hero .type-lede {
  margin: 0;
  max-width: 36ch;
  font-size: clamp(0.98rem, 1.5vw, 1.08rem);
  line-height: 1.78;
  color: var(--ink-2);
}

.page-about .about-hero__media {
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--paper-2);
  aspect-ratio: 1400 / 700;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ——— 时间线 ——— */

.page-about .about-timeline {
  padding-block: clamp(2.6rem, 6vw, 4.4rem);
  background: var(--paper-2);
}

.page-about .about-timeline__head {
  display: grid;
  gap: 0.55rem;
  margin-bottom: clamp(1.8rem, 4vw, 2.8rem);
  max-width: 62ch;
}

.page-about .about-timeline__head h2 {
  font-family: var(--font-title);
  font-weight: 400;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  line-height: 1.32;
  margin: 0;
  color: var(--ink);
}

.page-about .about-timeline__note {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.75;
  color: var(--slate);
  max-width: 42ch;
}

.page-about .year-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 0.55rem;
  margin-top: 0.7rem;
}

.page-about .year-nav a {
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.8rem;
  border-radius: var(--r-pill);
  background: var(--paper);
  color: var(--ink-2);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-decoration: none;
  border: 1px solid transparent;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .year-nav a:hover {
  background: var(--white);
  border-color: var(--sand);
  transform: translateY(-1px);
}

.page-about .year-nav a:focus-visible {
  outline: 2px solid var(--clay);
  outline-offset: 2px;
}

.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.9rem;
}

@media (min-width: 820px) {
  .page-about .timeline {
    gap: 2.4rem;
  }
}

.page-about .timeline__item {
  position: relative;
  display: grid;
  gap: 0.2rem;
  padding-left: 1.8rem;
  scroll-margin-top: calc(var(--header-h) + 1.4rem);
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 1.1rem;
  bottom: -1.9rem;
  width: 1px;
  background: var(--sand-soft);
}

.page-about .timeline__item:last-child::before {
  display: none;
}

.page-about .timeline__item::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72rem;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--sand);
  box-shadow: 0 0 0 3px var(--paper-2);
}

.page-about .timeline__mark {
  position: relative;
}

.page-about .timeline__year {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 1.35rem;
  letter-spacing: 0.02em;
  color: var(--ink);
  line-height: 1.2;
}

.page-about .timeline__body h3 {
  font-family: var(--font-title);
  font-weight: 500;
  font-size: 1.12rem;
  line-height: 1.45;
  margin: 0.35rem 0 0.3rem;
  color: var(--ink);
}

.page-about .timeline__body p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.78;
  color: var(--ink-2);
  max-width: 42ch;
}

.page-about .timeline__body .tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.05em;
}

.page-about .timeline__item:target .timeline__year {
  color: var(--clay);
}

.page-about .timeline__item:target::after {
  background: var(--clay);
  box-shadow: 0 0 0 4px rgba(201, 106, 61, .18);
}

.page-about .timeline__item:target .timeline__body h3 {
  color: var(--clay-deep);
}

@media (min-width: 820px) {
  .page-about .timeline__item {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 0 2.5rem;
    padding-left: 0;
  }

  .page-about .timeline__item::before,
  .page-about .timeline__item::after {
    display: none;
  }

  .page-about .timeline__mark {
    padding-top: 0.15rem;
  }

  .page-about .timeline__mark::after {
    content: "";
    position: absolute;
    top: 0.75rem;
    right: -1.55rem;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--sand);
    box-shadow: 0 0 0 4px var(--paper-2);
  }

  .page-about .timeline__mark::before {
    content: "";
    position: absolute;
    top: 1.55rem;
    right: -1.28rem;
    bottom: -1.5rem;
    width: 1px;
    background: var(--sand-soft);
  }

  .page-about .timeline__item:last-child .timeline__mark::before {
    display: none;
  }

  .page-about .timeline__year {
    display: block;
    text-align: right;
    font-size: 1.15rem;
    color: var(--slate);
    padding-right: 0.1rem;
  }

  .page-about .timeline__item:target .timeline__mark::after {
    background: var(--clay);
    box-shadow: 0 0 0 4px rgba(201, 106, 61, .18);
  }
}

/* ——— 团队 ——— */

.page-about .about-team {
  padding-block: clamp(2.6rem, 6vw, 4.6rem);
  background: var(--ink);
  color: var(--paper);
}

.page-about .about-team__inner {
  display: grid;
  gap: clamp(1.6rem, 4vw, 2.8rem);
}

@media (min-width: 900px) {
  .page-about .about-team__inner {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: center;
  }
}

.page-about .about-team__text {
  display: grid;
  gap: 0.55rem;
  align-content: start;
}

.page-about .about-team .type-label {
  color: var(--sand);
}

.page-about .about-team h2 {
  font-family: var(--font-title);
  font-weight: 400;
  font-size: clamp(1.45rem, 2.9vw, 2.1rem);
  line-height: 1.36;
  margin: 0;
  color: var(--paper);
  max-width: 22ch;
}

.page-about .about-team__lede {
  margin: 0.35rem 0 1.3rem;
  font-size: 0.96rem;
  line-height: 1.8;
  color: var(--on-ink);
  max-width: 40ch;
}

.page-about .team-roles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.page-about .team-roles li {
  position: relative;
  padding-left: 1.1rem;
  display: grid;
  gap: 0.15rem;
}

.page-about .team-roles li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62rem;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--sand);
}

.page-about .team-roles strong {
  font-size: 0.93rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--sand-soft);
}

.page-about .team-roles p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.74;
  color: var(--on-ink);
}

.page-about .about-team__media {
  border-radius: var(--r-lg);
  overflow: hidden;
  aspect-ratio: 3 / 2;
  background: var(--ink-2);
}

.page-about .about-team__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ——— 企业分类 ——— */

.page-about .about-browse {
  padding-block: clamp(2.6rem, 6vw, 4.6rem);
  background: var(--paper);
}

.page-about .about-browse__top {
  display: grid;
  gap: clamp(1.4rem, 3.5vw, 2.4rem);
}

@media (min-width: 900px) {
  .page-about .about-browse__top {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    align-items: center;
  }
}

.page-about .about-browse__intro {
  display: grid;
  gap: 0.6rem;
  align-content: start;
}

.page-about .about-browse__intro h2 {
  font-family: var(--font-title);
  font-weight: 400;
  font-size: clamp(1.45rem, 2.9vw, 2.1rem);
  line-height: 1.34;
  margin: 0;
  max-width: 20ch;
}

.page-about .about-browse__intro p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--ink-2);
  max-width: 38ch;
}

.page-about .about-browse__media {
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--paper-2);
  aspect-ratio: 4 / 3;
}

.page-about .about-browse__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-browse__list {
  list-style: none;
  margin: clamp(1.8rem, 4vw, 2.6rem) 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-browse__row {
  display: grid;
  gap: 0.3rem;
  padding-block: 1.1rem;
  border-bottom: 1px solid var(--line);
}

@media (min-width: 780px) {
  .page-about .about-browse__row {
    grid-template-columns: 76px minmax(0, 1fr) auto;
    align-items: start;
    gap: 0 1.5rem;
    padding-block: 1.25rem;
  }
}

.page-about .about-browse__num {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 0.98rem;
  letter-spacing: 0.04em;
  color: var(--sand);
}

.page-about .about-browse__row h3 {
  font-family: var(--font-title);
  font-weight: 500;
  font-size: 1.04rem;
  line-height: 1.4;
  margin: 0;
  color: var(--ink);
}

.page-about .about-browse__row p {
  margin: 0.2rem 0 0;
  font-size: 0.9rem;
  line-height: 1.74;
  color: var(--ink-2);
  max-width: 50ch;
}

.page-about .about-browse__link {
  justify-self: start;
  align-self: center;
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--clay);
  text-decoration: none;
  white-space: nowrap;
  padding: 0.15rem 0;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-browse__link:hover {
  color: var(--clay-deep);
  border-bottom-color: var(--clay-deep);
}

.page-about .about-browse__link:focus-visible {
  outline: 2px solid var(--clay);
  outline-offset: 3px;
}

/* ——— 反馈循环 ——— */

.page-about .about-cycle {
  padding-block: clamp(2.6rem, 6vw, 4.6rem);
  background: var(--paper-2);
}

.page-about .about-cycle h2 {
  font-family: var(--font-title);
  font-weight: 400;
  font-size: clamp(1.45rem, 2.9vw, 2.1rem);
  line-height: 1.34;
  margin: 0.4rem 0 0.6rem;
  max-width: 22ch;
}

.page-about .about-cycle__lede {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--ink-2);
  max-width: 46ch;
}

.page-about .cycle-steps {
  list-style: none;
  margin: clamp(1.6rem, 4vw, 2.4rem) 0 0;
  padding: 0;
  display: grid;
  gap: 1.3rem;
}

@media (min-width: 700px) {
  .page-about .cycle-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.5rem 2rem;
  }
}

@media (min-width: 1040px) {
  .page-about .cycle-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .cycle-steps li {
  display: grid;
  gap: 0.25rem;
  padding-top: 0.85rem;
  border-top: 2px solid var(--sand);
}

.page-about .cycle-steps__num {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 1.4rem;
  line-height: 1;
  color: var(--sand);
}

.page-about .cycle-steps h3 {
  font-family: var(--font-title);
  font-weight: 500;
  font-size: 1rem;
  margin: 0.25rem 0 0.1rem;
  color: var(--ink);
}

.page-about .cycle-steps p {
  margin: 0;
  font-size: 0.89rem;
  line-height: 1.72;
  color: var(--ink-2);
}

.page-about .about-cycle__action {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: clamp(1.6rem, 4vw, 2.4rem);
}

.page-about .about-cycle__action .btn:focus-visible {
  outline: 2px solid var(--clay-deep);
  outline-offset: 3px;
}
<<<END>>>