.page-about {
  background: var(--paper);
  color: var(--ink);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-block: clamp(18px, 3vw, 36px) clamp(44px, 6vw, 84px);
  background:
    radial-gradient(120% 100% at 92% -18%, rgba(47, 122, 114, 0.22), transparent 62%),
    linear-gradient(180deg, var(--snow) 0%, var(--snow) 58%, var(--paper) 100%);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  margin-top: clamp(16px, 3vw, 32px);
}

.page-about .about-hero__title {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-size: clamp(38px, 7vw, 82px);
  line-height: 1.02;
  letter-spacing: -0.03em;
  font-weight: 800;
  color: var(--ink);
}

.page-about .about-hero__lede {
  margin: clamp(16px, 2.4vw, 26px) 0 0;
  max-width: 44em;
  font-size: clamp(15.5px, 1.5vw, 19px);
  line-height: 1.64;
  color: var(--graphite);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 18px;
  margin-top: clamp(22px, 3vw, 34px);
}

.page-about .about-hero__panel {
  background: var(--paper);
  border: 1px solid var(--line);
  border-left: 4px solid var(--race);
  padding: clamp(18px, 2.6vw, 26px);
  box-shadow: var(--shadow-plate);
  transform: rotate(-0.7deg);
  transform-origin: 50% 0;
}

.page-about .about-hero__panel-title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  color: var(--race);
  text-transform: uppercase;
}

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

.page-about .about-fact {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 0;
  border-bottom: 1px dashed var(--line-soft);
}

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

.page-about .about-fact dt {
  flex: 0 0 auto;
  min-width: 4.6em;
  font-family: var(--font-mono);
  font-size: clamp(18px, 2.2vw, 23px);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--teal);
  line-height: 1.1;
}

.page-about .about-fact dd {
  margin: 0;
  font-size: 13px;
  line-height: 1.5;
  color: var(--graphite);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-chapter {
  padding-block: clamp(44px, 6.4vw, 88px);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-chapter--tint {
  background: linear-gradient(180deg, rgba(215, 230, 232, 0.55) 0%, rgba(215, 230, 232, 0.25) 100%);
}

.page-about .about-chapter__grid {
  display: grid;
  gap: 14px;
}

.page-about .about-chapter__aside {
  display: flex;
  align-items: center;
  gap: 14px;
}

.page-about .about-chapter__no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(38px, 8vw, 72px);
  line-height: 0.82;
  font-weight: 700;
  letter-spacing: -0.05em;
  color: var(--race);
  opacity: 0.22;
}

.page-about .about-chapter__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--graphite);
  white-space: nowrap;
}

.page-about .about-chapter__title {
  margin: 0 0 14px;
  font-family: var(--font-head);
  font-size: clamp(25px, 3.6vw, 40px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--ink);
}

.page-about .about-chapter__intro {
  margin: 0 0 clamp(20px, 3vw, 32px);
  max-width: 42em;
  font-size: 15.5px;
  line-height: 1.68;
  color: var(--graphite);
}

.page-about .about-chapter__body > p {
  font-size: 15.5px;
  line-height: 1.68;
  color: var(--graphite);
}

/* ---------- 场景 ---------- */
.page-about .about-scenes {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-scene {
  position: relative;
  padding: 24px 20px 20px;
  background: var(--paper);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-plate);
  display: flex;
  flex-direction: column;
}

.page-about .about-scene::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--race);
}

.page-about .about-scene:nth-child(2)::before {
  background: var(--teal-soft);
}

.page-about .about-scene:nth-child(3)::before {
  background: var(--sand-deep);
}

.page-about .about-scene__no {
  display: block;
  margin-bottom: 10px;
  font-size: 11.5px;
  letter-spacing: 0.2em;
  color: var(--graphite);
}

.page-about .about-scene__title {
  margin: 0 0 8px;
  font-size: 17.5px;
  line-height: 1.34;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-scene__text {
  margin: 0 0 16px;
  font-size: 14.5px;
  line-height: 1.64;
  color: var(--graphite);
}

.page-about .about-scene .btn--quiet {
  margin-top: auto;
  align-self: flex-start;
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 0 0 clamp(20px, 3vw, 30px);
}

.page-about .about-figure__frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--snow-deep);
  aspect-ratio: 16 / 10;
}

.page-about .about-figure__frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.92);
}

.page-about .about-figure--wide .about-figure__frame {
  aspect-ratio: 14 / 9;
}

.page-about .about-figure--banner .about-figure__frame {
  aspect-ratio: 16 / 6;
  border-color: var(--snow-deep);
}

.page-about .about-figure__cap {
  margin-top: 9px;
  padding-left: 11px;
  border-left: 2px solid var(--sand-deep);
  font-size: 12.5px;
  line-height: 1.52;
  color: var(--graphite);
}

/* ---------- 服务对象 ---------- */
.page-about .about-audience {
  display: grid;
  gap: 16px;
}

.page-about .about-audience__item {
  padding: 20px 18px;
  background: var(--sand);
  border: 1px solid var(--sand-deep);
}

.page-about .about-audience__item:nth-child(2) {
  background: var(--snow);
  border-color: var(--snow-deep);
}

.page-about .about-audience__item:nth-child(3) {
  background: var(--paper);
  border: 1px solid var(--line);
  border-left: 4px solid var(--teal);
}

.page-about .about-audience__item .tag {
  display: inline-block;
  margin-bottom: 12px;
}

.page-about .about-audience__text {
  margin: 0 0 14px;
  font-size: 14.5px;
  line-height: 1.64;
  color: var(--graphite);
}

.page-about .about-audience__link {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--race-deep);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 1px;
  transition: color var(--dur) var(--ease);
}

.page-about .about-audience__link:hover,
.page-about .about-audience__link:focus-visible {
  color: var(--teal);
}

/* ---------- 核对与节奏 ---------- */
.page-about .about-split {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
}

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

.page-about .about-split__figure .about-figure__frame {
  aspect-ratio: 1 / 1;
}

.page-about .about-split__body > p {
  margin: 0 0 4px;
  font-size: 15px;
  line-height: 1.68;
  color: var(--graphite);
}

.page-about .about-cadence {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-cadence li {
  display: grid;
  grid-template-columns: 5.6em minmax(0, 1fr);
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 14.5px;
  line-height: 1.58;
  color: var(--ink);
}

.page-about .about-cadence__key {
  font-size: 12.5px;
  color: var(--teal);
  letter-spacing: 0;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 4px 0 0 26px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 12px;
  width: 2px;
  background: var(--teal);
  opacity: 0.32;
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: clamp(20px, 2.6vw, 28px);
}

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

.page-about .about-timeline__dot {
  position: absolute;
  left: -26px;
  top: 5px;
  width: 15px;
  height: 15px;
  background: var(--paper);
  border: 2px solid var(--teal);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-timeline__item:hover .about-timeline__dot,
.page-about .about-timeline__item:focus-within .about-timeline__dot {
  background: var(--race);
  border-color: var(--race);
  transform: scale(1.14);
}

.page-about .about-timeline__year {
  margin: 0 0 4px;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--race);
  font-weight: 700;
}

.page-about .about-timeline__text h3 {
  margin: 0 0 6px;
  font-size: 17px;
  line-height: 1.36;
  font-weight: 700;
  color: var(--ink);
  transition: color var(--dur) var(--ease);
}

.page-about .about-timeline__item:hover .about-timeline__text h3 {
  color: var(--teal);
}

.page-about .about-timeline__text p {
  margin: 0;
  max-width: 40em;
  font-size: 14.5px;
  line-height: 1.64;
  color: var(--graphite);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: 16px;
  margin-top: clamp(18px, 2.6vw, 28px);
}

.page-about .about-team__card {
  padding: 22px 20px 24px;
  background: var(--sand);
  border: 1px solid var(--sand-deep);
}

.page-about .about-team__card h3 {
  margin: 0 0 10px;
  font-size: 17.5px;
  line-height: 1.32;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-team__card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.64;
  color: var(--graphite);
}

.page-about .about-team__metric {
  display: block;
  margin-bottom: 10px;
  font-size: clamp(26px, 3.4vw, 34px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--teal);
}

.page-about .about-team__card--support {
  background: var(--snow);
  border-color: var(--snow-deep);
}

.page-about .about-team__card--support .about-team__metric {
  color: var(--teal-soft);
}

.page-about .about-team__card--tech {
  background: var(--teal);
  border-color: var(--teal);
}

.page-about .about-team__card--tech h3 {
  color: var(--paper);
}

.page-about .about-team__card--tech p {
  color: rgba(248, 246, 241, 0.8);
}

.page-about .about-team__card--tech .about-team__metric {
  color: var(--sand);
}

/* ---------- 联络 ---------- */
.page-about .about-contact {
  margin-top: clamp(18px, 2.6vw, 28px);
  padding: clamp(18px, 2.6vw, 26px);
  background: var(--snow);
  border: 1px solid var(--snow-deep);
  border-left: 4px solid var(--teal);
}

.page-about .about-contact__list {
  margin: 0 0 14px;
  padding: 0;
}

.page-about .about-contact__row {
  display: grid;
  grid-template-columns: 5.4em minmax(0, 1fr);
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 14.5px;
  line-height: 1.55;
}

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

.page-about .about-contact__key {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0;
  color: var(--graphite);
}

.page-about .about-contact__val {
  margin: 0;
  color: var(--ink);
  font-weight: 600;
  word-break: break-word;
}

.page-about .about-contact__note {
  margin: 0 0 16px;
  font-size: 13px;
  line-height: 1.58;
  color: var(--graphite);
}

/* ---------- 结尾索引轨道 ---------- */
.page-about .about-outro {
  padding-block: clamp(40px, 6vw, 76px);
  background:
    linear-gradient(90deg, var(--sand) 0%, var(--sand) 100%);
  border-top: 1px solid var(--sand-deep);
}

.page-about .about-outro__rail {
  border-left: 4px solid var(--race);
  padding-left: clamp(16px, 2.6vw, 28px);
}

.page-about .about-outro__title {
  margin: 10px 0 12px;
  font-family: var(--font-head);
  font-size: clamp(23px, 3.2vw, 36px);
  line-height: 1.18;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--ink);
}

.page-about .about-outro__text {
  margin: 0 0 clamp(18px, 2.6vw, 26px);
  max-width: 40em;
  font-size: 15px;
  line-height: 1.66;
  color: var(--graphite);
}

.page-about .about-outro__links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 20px;
}

.page-about .about-outro__link {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--sand-deep);
  padding-bottom: 2px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-outro__link:hover,
.page-about .about-outro__link:focus-visible {
  color: var(--race-deep);
  border-color: var(--race-deep);
}

/* ---------- 焦点可见性 ---------- */
.page-about a:focus-visible {
  outline: 2px solid var(--race);
  outline-offset: 3px;
}

/* ---------- 断点 ---------- */
@media (min-width: 760px) {
  .page-about .about-audience {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }
}

@media (min-width: 860px) {
  .page-about .about-scenes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
    align-items: start;
  }

  .page-about .about-team__card:nth-child(2) {
    margin-top: 20px;
  }

  .page-about .about-team__card:nth-child(3) {
    margin-top: 40px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.32fr) minmax(0, 0.68fr);
    align-items: start;
  }

  .page-about .about-chapter__grid {
    grid-template-columns: 128px minmax(0, 1fr);
    gap: clamp(24px, 4vw, 56px);
    align-items: start;
  }

  .page-about .about-chapter__aside {
    flex-direction: column;
    align-items: flex-start;
    gap: 18px;
    padding-top: 8px;
  }

  .page-about .about-chapter__label {
    writing-mode: vertical-rl;
    letter-spacing: 0.34em;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 0.42fr) minmax(0, 0.58fr);
    align-items: start;
  }

  .page-about .about-figure--banner .about-figure__frame {
    aspect-ratio: 16 / 5;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-hero__panel {
    transform: none;
  }

  .page-about .about-timeline__dot,
  .page-about .about-timeline__text h3 {
    transition: none;
  }

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