.page-about {
  --about-measure: 34em;
  --about-hair: rgba(18, 33, 28, 0.14);
  --about-hair-soft: rgba(18, 33, 28, 0.08);
  background: var(--paper);
  color: var(--graphite);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-about .about-hero {
  position: relative;
  padding: clamp(26px, 5vw, 52px) 0 clamp(44px, 7vw, 88px);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -18%;
  right: -14%;
  width: min(62vw, 640px);
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle at 34% 34%, rgba(181, 106, 74, 0.22), rgba(181, 106, 74, 0) 68%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  gap: clamp(20px, 4vw, 44px);
  padding-top: clamp(24px, 4vw, 44px);
  grid-template-columns: 1fr;
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.18fr) minmax(0, 0.82fr);
    align-items: end;
  }
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2rem, 6vw, 4rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
  margin: 0.18em 0 0;
  max-width: 15em;
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 30em;
  font-size: clamp(0.98rem, 1.5vw, 1.08rem);
  line-height: 1.9;
  color: rgba(18, 33, 28, 0.84);
  padding-top: 1.2em;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-section {
  padding: clamp(34px, 6vw, 76px) 0;
}

.page-about .about-block {
  max-width: calc(var(--about-measure) + 4em);
}

.page-about .about-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.5rem, 3.4vw, 2.25rem);
  line-height: 1.3;
  letter-spacing: -0.01em;
  margin: 0.28em 0 0.85em;
}

.page-about .about-copy {
  max-width: var(--about-measure);
}

.page-about .about-copy p {
  margin: 0 0 1.4em;
  font-size: 1rem;
  line-height: 1.95;
  color: rgba(18, 33, 28, 0.86);
}

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

.page-about .about-copy--tight {
  margin-top: 1.8em;
}

.page-about .about-copy a,
.page-about .about-cta__note a {
  color: var(--ink-on-paper);
  text-decoration: none;
  border-bottom: 1px solid rgba(12, 90, 71, 0.35);
  transition: border-color var(--dur) var(--ease);
}

.page-about .about-copy a:hover,
.page-about .about-cta__note a:hover {
  border-bottom-color: var(--ink-on-paper);
}

.page-about .about-pull {
  max-width: var(--about-measure);
  margin: 2.4em 0 0;
  padding: 1.1em 0 1.1em 1.4em;
  border-left: 3px solid var(--clay);
  font-family: var(--font-display);
  font-size: clamp(1.06rem, 2.1vw, 1.35rem);
  line-height: 1.65;
  color: var(--ink-on-paper);
}

/* 图文分栏 */
.page-about .about-split {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  grid-template-columns: 1fr;
}

@media (min-width: 880px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }

  .page-about .about-split--flip {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  }
}

.page-about .about-split__body {
  max-width: calc(var(--about-measure) + 3em);
}

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

.page-about .about-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--r-card);
  filter: saturate(0.76) contrast(1.03);
}

.page-about .about-split--flip .about-media img {
  aspect-ratio: 16 / 10;
}

.page-about .about-media figcaption {
  margin-top: 0.85em;
  font-size: 0.8rem;
  line-height: 1.7;
  letter-spacing: 0.02em;
  color: rgba(12, 90, 71, 0.86);
}

/* 四条工作线 */
.page-about .about-lines {
  list-style: none;
  margin: 2.2em 0 0;
  padding: 0;
}

.page-about .about-line {
  padding: 18px 0;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-line:last-child {
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-line__tag {
  display: inline-block;
  font-family: var(--font-data);
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  color: var(--ink-on-paper);
  padding: 0.32em 0.85em;
  border-radius: var(--r-pill);
  background: rgba(63, 240, 200, 0.2);
}

.page-about .about-line p {
  margin: 0.7em 0 0;
  font-size: 0.96rem;
  line-height: 1.85;
  color: rgba(18, 33, 28, 0.82);
}

/* 四步流程 */
.page-about .about-flow {
  list-style: none;
  margin: 2.2em 0 0;
  padding: 0;
}

.page-about .about-flow__step {
  position: relative;
  padding: 0 0 2.3em 3.4em;
}

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

.page-about .about-flow__step::before {
  content: "";
  position: absolute;
  left: 17px;
  top: 38px;
  bottom: 4px;
  width: 1px;
  background: linear-gradient(to bottom, var(--moss), rgba(28, 58, 46, 0.12));
}

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

.page-about .about-flow__num {
  position: absolute;
  left: 0;
  top: 0;
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  font-family: var(--font-data);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--ink-on-paper);
  background: rgba(63, 240, 200, 0.22);
  border: 1px solid rgba(12, 90, 71, 0.24);
  border-radius: var(--r-soft);
}

.page-about .about-flow__step h3 {
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 700;
  margin: 0.35em 0 0.4em;
}

.page-about .about-flow__step p {
  margin: 0;
  font-size: 0.96rem;
  line-height: 1.9;
  color: rgba(18, 33, 28, 0.82);
}

/* 覆盖数字 */
.page-about .about-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 2.2em 0 2.4em;
  background: var(--about-hair);
  border: 1px solid var(--about-hair);
  border-radius: var(--r-card);
  overflow: hidden;
}

@media (min-width: 760px) {
  .page-about .about-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-figures__cell {
  background: var(--paper);
  padding: clamp(18px, 2.6vw, 26px);
}

.page-about .about-figures__num {
  display: block;
  font-family: var(--font-data);
  font-weight: 700;
  font-size: clamp(1.8rem, 4.4vw, 2.7rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--ink-on-paper);
}

.page-about .about-figures__label {
  display: block;
  margin-top: 0.8em;
  font-size: 0.84rem;
  line-height: 1.65;
  color: rgba(18, 33, 28, 0.74);
}

/* 合作 */
.page-about .about-channel {
  display: grid;
  gap: 14px;
  margin: 2.1em 0;
}

@media (min-width: 820px) {
  .page-about .about-channel {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }
}

.page-about .about-channel__item {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  padding: 22px;
  border-radius: var(--r-card);
  background: rgba(28, 58, 46, 0.07);
  border: 1px solid rgba(28, 58, 46, 0.13);
}

.page-about .about-channel__num {
  flex: none;
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 1.85rem;
  line-height: 1;
  color: var(--ink-on-paper);
}

.page-about .about-channel__item h3 {
  font-family: var(--font-display);
  font-size: 1.04rem;
  font-weight: 700;
  margin: 0 0 0.45em;
}

.page-about .about-channel__item p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: rgba(18, 33, 28, 0.78);
}

/* 深色时间轴 */
.page-about .about-timeline {
  position: relative;
  overflow: hidden;
  padding: clamp(46px, 8vw, 92px) 0 clamp(88px, 12vw, 134px);
  background: radial-gradient(130% 100% at 10% 0%, #14372c 0%, var(--court) 45%, var(--night) 100%);
  color: var(--paper);
}

.page-about .about-timeline::after {
  content: "";
  position: absolute;
  left: -12%;
  width: 124%;
  bottom: -1px;
  height: clamp(34px, 5vw, 58px);
  background: var(--paper);
  border-radius: 50% 50% 0 0 / 100% 100% 0 0;
}

.page-about .about-timeline__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.5rem, 3.4vw, 2.25rem);
  line-height: 1.3;
  letter-spacing: -0.01em;
  margin: 0.28em 0 0;
  color: var(--paper);
}

.page-about .about-axis {
  position: relative;
  display: flex;
  list-style: none;
  margin: 2.8em 0 0;
  padding: 0;
}

.page-about .about-axis::before {
  content: "";
  position: absolute;
  left: 4px;
  right: 4px;
  top: 5px;
  height: 1px;
  background: linear-gradient(to right, rgba(63, 240, 200, 0.6), rgba(168, 245, 226, 0.14));
}

.page-about .about-axis__item {
  position: relative;
  flex: 1 1 0;
  min-width: 0;
  padding: 26px 10px 0 0;
}

.page-about .about-axis__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--night);
  border: 2px solid var(--cyan);
}

.page-about .about-axis__link {
  display: block;
  text-decoration: none;
}

.page-about .about-axis__year {
  display: block;
  font-family: var(--font-data);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

.page-about .about-axis__cap {
  display: block;
  margin-top: 0.4em;
  font-size: 0.74rem;
  line-height: 1.5;
  color: rgba(242, 239, 230, 0.6);
}

.page-about .about-axis__link:hover .about-axis__cap {
  color: var(--mist);
}

@media (max-width: 640px) {
  .page-about .about-axis__cap {
    display: none;
  }

  .page-about .about-axis__item {
    padding-right: 4px;
  }
}

.page-about .about-milestones {
  margin-top: 2.6em;
}

.page-about .about-milestone {
  padding: 22px 0;
  border-top: 1px solid rgba(168, 245, 226, 0.14);
  scroll-margin-top: 96px;
}

.page-about .about-milestone:last-child {
  border-bottom: 1px solid rgba(168, 245, 226, 0.14);
}

.page-about .about-milestone__year {
  margin: 0;
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 1.3rem;
  letter-spacing: -0.01em;
  color: var(--cyan);
}

.page-about .about-milestone h3 {
  font-family: var(--font-display);
  font-size: 1.04rem;
  font-weight: 700;
  margin: 0.5em 0 0;
  color: var(--paper);
}

.page-about .about-milestone__desc {
  margin: 0.5em 0 0;
  max-width: 32em;
  font-size: 0.92rem;
  line-height: 1.85;
  color: rgba(242, 239, 230, 0.72);
}

@media (min-width: 820px) {
  .page-about .about-milestone {
    display: grid;
    grid-template-columns: 104px minmax(0, 1fr);
    column-gap: 30px;
    align-items: start;
  }

  .page-about .about-milestone__year {
    grid-column: 1;
    grid-row: 1 / span 2;
    padding-top: 0.1em;
  }

  .page-about .about-milestone h3 {
    grid-column: 2;
    grid-row: 1;
    margin-top: 0;
  }

  .page-about .about-milestone__desc {
    grid-column: 2;
    grid-row: 2;
  }
}

/* 通栏图 */
.page-about .about-wide {
  margin: clamp(36px, 6vw, 74px) 0 0;
}

.page-about .about-wide img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  border-radius: var(--r-card);
  filter: saturate(0.68) contrast(1.02);
}

.page-about .about-wide figcaption {
  margin-top: 0.9em;
  font-size: 0.8rem;
  line-height: 1.7;
  color: rgba(12, 90, 71, 0.86);
}

/* 四张窄条卡片 */
.page-about .about-principles {
  padding-bottom: clamp(38px, 6vw, 70px);
}

.page-about .about-principles__list {
  list-style: none;
  margin: 2.2em 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-principle {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 18px;
  padding: 20px 22px;
  border-radius: var(--r-soft);
  background: rgba(28, 58, 46, 0.06);
  border: 1px solid rgba(28, 58, 46, 0.12);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), background var(--dur) var(--ease);
}

@media (min-width: 820px) {
  .page-about .about-principle {
    grid-template-columns: 46px minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 8px 26px;
    align-items: start;
  }

  .page-about .about-principle:hover {
    transform: translateY(-4px);
    background: rgba(28, 58, 46, 0.1);
    box-shadow: 0 20px 38px -28px rgba(18, 33, 28, 0.85);
  }
}

.page-about .about-principle__idx {
  font-family: var(--font-data);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--ink-on-paper);
  padding-top: 0.25em;
}

.page-about .about-principle__main h3 {
  font-family: var(--font-display);
  font-size: 1.04rem;
  font-weight: 700;
  margin: 0 0 0.4em;
}

.page-about .about-principle__main p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.85;
  color: rgba(18, 33, 28, 0.8);
}

.page-about .about-principle__more {
  grid-column: 2;
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.75;
  color: rgba(18, 33, 28, 0.62);
}

@media (min-width: 820px) {
  .page-about .about-principle__more {
    grid-column: 3;
    padding-top: 0.25em;
  }
}

@media (hover: hover) and (pointer: fine) and (min-width: 820px) {
  .page-about .about-principle__more {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height var(--dur) var(--ease), opacity var(--dur) var(--ease);
  }

  .page-about .about-principle:hover .about-principle__more,
  .page-about .about-principle:focus-within .about-principle__more {
    max-height: 8em;
    opacity: 1;
  }
}

/* 收尾行动区 */
.page-about .about-cta {
  padding: clamp(34px, 6vw, 68px) 0 clamp(52px, 8vw, 96px);
}

.page-about .about-cta__inner {
  border-top: 1px solid var(--about-hair);
  padding-top: clamp(26px, 4vw, 46px);
  display: grid;
  gap: 22px;
}

.page-about .about-cta__lead {
  max-width: calc(var(--about-measure) + 4em);
}

.page-about .about-cta__lead p {
  margin: 0;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.page-about .about-cta__note {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.8;
  color: rgba(18, 33, 28, 0.7);
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-principle,
  .page-about .about-principle__more {
    transition: none;
  }

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