.page-about {
  --about-gap: clamp(18px, 3vw, 34px);
  --about-radius: 30px;
  --about-shadow: 0 20px 44px -30px rgba(11, 43, 36, .55);
  background: var(--pg-paper);
  color: var(--pg-black);
  font-family: var(--pg-font-body);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  background: var(--pg-ink);
  color: var(--pg-paper);
  padding: calc(var(--pg-header-h) + 30px) 0 clamp(40px, 6vw, 68px);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  z-index: 0;
  top: -32%;
  right: -26%;
  width: 82%;
  height: 168%;
  background: linear-gradient(158deg, var(--pg-ink-2), var(--pg-ink-3) 58%, var(--pg-ink));
  border-radius: 56px;
  transform: rotate(-7deg);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  z-index: 0;
  left: -10%;
  bottom: -46%;
  width: 52%;
  height: 88%;
  background: radial-gradient(circle at 30% 30%, rgba(37, 214, 196, .16), transparent 68%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(28px, 5vw, 48px);
}

.page-about .about-hero__crumb {
  margin-bottom: 20px;
}

.page-about .about-hero__eyebrow {
  margin: 0 0 12px;
  font-family: var(--pg-font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--pg-amber);
}

.page-about .about-hero__title {
  margin: 0;
  font-family: var(--pg-font-display);
  font-weight: 200;
  font-size: clamp(2.1rem, 7vw, 4.2rem);
  line-height: 1.06;
  letter-spacing: -.03em;
  color: var(--pg-warm);
}

.page-about .about-hero__lead {
  margin: 22px 0 0;
  max-width: 46ch;
  font-size: clamp(15.5px, 2.4vw, 17.5px);
  line-height: 1.85;
  color: rgba(244, 239, 223, .78);
}

.page-about .about-hero__facts {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 16px 34px;
  margin: 30px 0 0;
  padding: 22px 0 0;
  border-top: 1px solid var(--pg-line);
}

.page-about .about-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 84px;
}

.page-about .about-hero__num {
  font-family: var(--pg-font-mono);
  font-weight: 700;
  font-size: clamp(1.25rem, 3.4vw, 1.7rem);
  line-height: 1;
  color: var(--pg-cyan);
  letter-spacing: -.01em;
}

.page-about .about-hero__unit {
  font-size: 12px;
  letter-spacing: .06em;
  color: rgba(244, 239, 223, .62);
}

.page-about .about-hero__media {
  margin: 0;
  border-radius: var(--about-radius);
  overflow: hidden;
  background: var(--pg-ink-2);
  border: 1px solid var(--pg-line);
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 7 / 4;
  object-fit: cover;
}

.page-about .about-hero__media figcaption {
  padding: 12px 18px;
  font-family: var(--pg-font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: rgba(244, 239, 223, .6);
  border-top: 1px solid var(--pg-line);
}

/* ---------- 主体版式 ---------- */
.page-about .about-layout {
  display: grid;
  gap: clamp(26px, 5vw, 52px);
  padding-top: clamp(38px, 6vw, 74px);
  padding-bottom: clamp(46px, 7vw, 92px);
}

.page-about .about-rail__label {
  margin: 0 0 12px;
  font-family: var(--pg-font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--pg-mist);
  text-transform: uppercase;
}

.page-about .about-rail__nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 8px;
  scrollbar-width: thin;
}

.page-about .about-rail__link {
  flex: 0 0 auto;
  white-space: nowrap;
  text-decoration: none;
  font-family: var(--pg-font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--pg-mist);
  padding: 8px 14px;
  border: 1px solid var(--pg-paper-2);
  border-radius: var(--pg-radius-pill);
  background: var(--pg-warm);
  transition: color .2s var(--pg-ease), background-color .2s var(--pg-ease), border-color .2s var(--pg-ease);
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  color: var(--pg-ink);
  border-color: var(--pg-amber);
}

.page-about .about-rail__link[data-active="true"] {
  color: var(--pg-ink);
  background: rgba(37, 214, 196, .18);
  border-color: var(--pg-cyan);
}

.page-about .about-rail__note {
  margin: 18px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--pg-mist);
}

.page-about .about-rail__note a {
  color: var(--pg-amber-deep);
  text-decoration: none;
  border-bottom: 1px solid rgba(169, 107, 18, .4);
}

.page-about .about-rail__note a:hover {
  border-bottom-color: var(--pg-amber-deep);
}

/* ---------- 章节 ---------- */
.page-about .about-chapter {
  scroll-margin-top: calc(var(--pg-header-h) + 26px);
}

.page-about .about-chapter + .about-chapter {
  margin-top: clamp(36px, 6vw, 62px);
  padding-top: clamp(32px, 5vw, 54px);
  border-top: 1px solid var(--pg-paper-2);
}

.page-about .about-chapter__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}

.page-about .about-chapter__no {
  flex: 0 0 auto;
  font-family: var(--pg-font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--pg-amber-deep);
  background: var(--pg-paper-2);
  border-radius: var(--pg-radius-pill);
  padding: 4px 11px;
}

.page-about .about-chapter__title {
  margin: 0;
  font-family: var(--pg-font-display);
  font-weight: 600;
  font-size: clamp(1.32rem, 4vw, 1.95rem);
  line-height: 1.28;
  letter-spacing: -.01em;
  color: var(--pg-ink);
}

.page-about .about-chapter__body p {
  margin: 0 0 16px;
  font-size: clamp(15.5px, 2.3vw, 17px);
  line-height: 1.88;
  color: var(--pg-black);
}

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

.page-about .about-chapter__aside {
  margin-top: 22px;
  padding: 16px 20px;
  border-left: 3px solid var(--pg-amber);
  border-radius: 0 var(--pg-radius-m) var(--pg-radius-m) 0;
  background: var(--pg-paper-2);
  font-size: 14.5px !important;
  line-height: 1.8 !important;
  color: var(--pg-ink) !important;
}

/* ---------- 更新流程 ---------- */
.page-about .about-flow {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
  counter-reset: aboutflow;
}

.page-about .about-flow__step {
  position: relative;
  background: var(--pg-warm);
  border: 1px solid var(--pg-paper-2);
  border-radius: var(--pg-radius-l);
  padding: 18px 20px 18px 22px;
  transition: border-color .2s var(--pg-ease), box-shadow .2s var(--pg-ease);
}

.page-about .about-flow__step:hover {
  border-color: rgba(37, 214, 196, .55);
  box-shadow: var(--about-shadow);
}

.page-about .about-flow__no {
  display: inline-block;
  font-family: var(--pg-font-mono);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--pg-ink);
  background: var(--pg-cyan);
  border-radius: var(--pg-radius-pill);
  padding: 3px 10px;
  margin-bottom: 10px;
}

.page-about .about-flow__name {
  margin: 0 0 8px;
  font-family: var(--pg-font-display);
  font-size: 15.5px;
  font-weight: 700;
  color: var(--pg-ink);
}

.page-about .about-flow__step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--pg-black);
}

/* ---------- 配图 ---------- */
.page-about .about-figure {
  margin: 26px 0 0;
  border-radius: var(--about-radius);
  overflow: hidden;
  background: var(--pg-paper-2);
  border: 1px solid var(--pg-paper-2);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

.page-about .about-figure--narrow img {
  aspect-ratio: 3 / 2;
}

.page-about .about-figure figcaption {
  padding: 12px 18px;
  font-family: var(--pg-font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--pg-mist);
  background: var(--pg-paper-2);
}

/* ---------- 时间线 ---------- */
.page-about .about-tl {
  position: relative;
  margin-top: 26px;
  padding: clamp(22px, 4vw, 38px);
  border-radius: var(--about-radius);
  background: linear-gradient(165deg, var(--pg-ink-2), var(--pg-ink) 72%);
  color: var(--pg-paper);
  overflow: hidden;
}

.page-about .about-tl::before {
  content: "";
  position: absolute;
  top: -30%;
  left: -12%;
  width: 46%;
  height: 120%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(37, 214, 196, .14), transparent 70%);
  pointer-events: none;
}

.page-about .about-tl__list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 24px;
}

.page-about .about-tl__item {
  position: relative;
  padding-top: 24px;
  border-top: 1px solid rgba(227, 167, 47, .34);
}

.page-about .about-tl__item::before {
  content: "";
  position: absolute;
  top: -5px;
  left: 0;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--pg-amber);
}

.page-about .about-tl__item:last-child::before {
  background: var(--pg-cyan);
  box-shadow: 0 0 0 4px rgba(37, 214, 196, .2);
}

.page-about .about-tl__no {
  display: block;
  font-family: var(--pg-font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--pg-amber);
  margin-bottom: 8px;
}

.page-about .about-tl__item:last-child .about-tl__no {
  color: var(--pg-cyan);
}

.page-about .about-tl__name {
  margin: 0 0 8px;
  font-family: var(--pg-font-display);
  font-size: 15px;
  font-weight: 700;
  color: var(--pg-warm);
}

.page-about .about-tl__desc {
  margin: 0;
  font-size: 13px;
  line-height: 1.72;
  color: rgba(244, 239, 223, .7);
}

.page-about .about-tl__note {
  position: relative;
  margin: 26px 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--pg-line);
  font-size: 13.5px;
  line-height: 1.8;
  color: rgba(244, 239, 223, .74);
}

/* ---------- 团队角色 ---------- */
.page-about .about-roles {
  display: grid;
  gap: 13px;
  margin-top: 24px;
}

.page-about .about-role {
  background: var(--pg-warm);
  border: 1px solid var(--pg-paper-2);
  border-radius: var(--pg-radius-l);
  padding: 16px 18px;
  transition: border-color .22s var(--pg-ease), box-shadow .22s var(--pg-ease);
}

.page-about .about-role[data-open="true"] {
  border-color: rgba(37, 214, 196, .52);
  box-shadow: var(--about-shadow);
}

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

.page-about .about-role .about-role__btn {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 12px;
  background: none;
  border: 0;
  padding: 0;
  margin: 0;
  cursor: pointer;
  font: inherit;
  color: inherit;
  text-align: left;
}

.page-about .about-role__count {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 38px;
  height: 34px;
  padding: 0 8px;
  border-radius: var(--pg-radius-m);
  background: var(--pg-ink);
  color: var(--pg-cyan);
  font-family: var(--pg-font-mono);
  font-size: 15px;
  font-weight: 700;
}

.page-about .about-role__name {
  flex: 1 1 auto;
  font-family: var(--pg-font-display);
  font-size: 15.5px;
  font-weight: 700;
  color: var(--pg-ink);
}

.page-about .about-role .pg-disclosure__sign {
  position: relative;
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
}

.page-about .about-role .pg-disclosure__sign::before,
.page-about .about-role .pg-disclosure__sign::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--pg-amber-deep);
  transform: translate(-50%, -50%);
  transition: transform .22s var(--pg-ease), opacity .22s var(--pg-ease);
}

.page-about .about-role .pg-disclosure__sign::before {
  width: 12px;
  height: 2px;
}

.page-about .about-role .pg-disclosure__sign::after {
  width: 2px;
  height: 12px;
}

.page-about .about-role[data-open="true"] .pg-disclosure__sign::after {
  transform: translate(-50%, -50%) scaleY(0);
  opacity: 0;
}

.page-about .about-role .pg-disclosure__panel {
  display: grid;
  grid-template-rows: 0fr;
  max-height: none;
  overflow: hidden;
  transition: grid-template-rows .3s var(--pg-ease);
}

.page-about .about-role[data-open="true"] > .pg-disclosure__panel {
  grid-template-rows: 1fr;
}

.page-about .about-role .pg-disclosure__inner {
  overflow: hidden;
  min-height: 0;
}

.page-about .about-role .pg-disclosure__body {
  padding-top: 12px;
}

.page-about .about-role .pg-disclosure__body p {
  margin: 0;
  font-size: 13.8px;
  line-height: 1.8;
  color: var(--pg-black);
}

/* ---------- 服务对象 ---------- */
.page-about .about-audience {
  display: grid;
  gap: 13px;
  margin-top: 24px;
}

.page-about .about-audience__card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px 20px 22px;
  border-radius: var(--pg-radius-l);
  background: var(--pg-paper-2);
  border: 1px solid rgba(169, 107, 18, .22);
  transition: transform .22s var(--pg-ease), border-color .22s var(--pg-ease);
}

.page-about .about-audience__card:hover {
  transform: translateY(-3px);
  border-color: var(--pg-amber);
}

.page-about .about-audience__tag {
  margin: 0;
  align-self: flex-start;
  font-family: var(--pg-font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--pg-ink);
  background: var(--pg-cyan);
  border-radius: var(--pg-radius-pill);
  padding: 3px 10px;
}

.page-about .about-audience__name {
  margin: 0;
  font-family: var(--pg-font-display);
  font-size: 17px;
  font-weight: 700;
  color: var(--pg-ink);
}

.page-about .about-audience__text {
  margin: 0;
  flex: 1 1 auto;
  font-size: 14px;
  line-height: 1.8;
  color: var(--pg-black);
}

.page-about .about-audience__link {
  align-self: flex-start;
  font-family: var(--pg-font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--pg-amber-deep);
  text-decoration: none;
  border-bottom: 1px solid rgba(169, 107, 18, .45);
  padding-bottom: 2px;
}

.page-about .about-audience__link:hover {
  color: var(--pg-ink);
  border-bottom-color: var(--pg-ink);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  background: var(--pg-ink);
  color: var(--pg-paper);
  padding: clamp(42px, 7vw, 82px) 0;
  border-top: 2px solid var(--pg-amber);
}

.page-about .about-cta__inner {
  display: grid;
  gap: 26px;
}

.page-about .about-cta__eyebrow {
  margin: 0 0 10px;
  font-family: var(--pg-font-mono);
  font-size: 11.5px;
  letter-spacing: .18em;
  color: var(--pg-amber);
  text-transform: uppercase;
}

.page-about .about-cta__title {
  margin: 0;
  font-family: var(--pg-font-display);
  font-weight: 200;
  font-size: clamp(1.6rem, 5vw, 2.7rem);
  line-height: 1.24;
  letter-spacing: -.02em;
  color: var(--pg-warm);
}

.page-about .about-cta__lead {
  margin: 16px 0 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(244, 239, 223, .74);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-cta__btn {
  text-decoration: none;
}

.page-about .about-cta .pg-btn--line {
  color: var(--pg-paper);
  border-color: rgba(227, 167, 47, .6);
}

.page-about .about-cta .pg-btn--line:hover {
  border-color: var(--pg-cyan);
  color: var(--pg-cyan);
}

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

  .page-about .about-tl__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px 22px;
  }

  .page-about .about-roles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-audience {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    align-items: center;
  }

  .page-about .about-layout {
    grid-template-columns: 212px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--pg-header-h) + 24px);
    align-self: start;
  }

  .page-about .about-rail__nav {
    flex-direction: column;
    overflow: visible;
    gap: 2px;
    padding-bottom: 0;
  }

  .page-about .about-rail__link {
    white-space: normal;
    border: 0;
    border-left: 2px solid var(--pg-paper-2);
    border-radius: 0;
    background: transparent;
    padding: 8px 0 8px 13px;
    font-size: 12.5px;
    line-height: 1.5;
  }

  .page-about .about-rail__link:hover,
  .page-about .about-rail__link:focus-visible {
    border-left-color: var(--pg-amber);
    background: transparent;
  }

  .page-about .about-rail__link[data-active="true"] {
    background: transparent;
    border-left: 2px solid var(--pg-cyan);
    color: var(--pg-ink);
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    gap: 34px;
  }

  .page-about .about-cta__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 1024px) {
  .page-about .about-tl__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 30px 24px;
  }

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