.page-about {
  background: var(--salt);
  color: var(--brown);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

.page-about .about-crumbs {
  padding-top: clamp(18px, 3vw, 28px);
  padding-bottom: clamp(10px, 2vw, 18px);
}

.page-about .about-crumbs .crumbs a {
  color: var(--blue-deep);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .25s var(--ease);
}
.page-about .about-crumbs .crumbs a:hover,
.page-about .about-crumbs .crumbs a:focus-visible {
  border-bottom-color: var(--gold);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  min-height: clamp(480px, 62vh, 660px);
  display: flex;
  align-items: flex-end;
  padding: clamp(40px, 7vw, 88px) var(--pad) clamp(44px, 7vw, 92px);
  overflow: hidden;
  border-radius: 0 0 var(--radius-l) var(--radius-l);
  background: var(--salt);
}

.page-about .about-hero__media {
  position: absolute;
  inset: 0;
  z-index: -2;
  overflow: hidden;
  border-radius: 0 0 var(--radius-l) var(--radius-l);
}

.page-about .about-hero__img {
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  object-position: 72% 50%;
  display: block;
  transform: scale(1.02);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(180deg, rgba(245, 245, 245, .82) 0%, rgba(245, 245, 245, .62) 42%, rgba(245, 245, 245, .9) 100%);
  border-radius: 0 0 var(--radius-l) var(--radius-l);
}

.page-about .about-hero__body {
  width: 100%;
  max-width: 760px;
}

.page-about .about-hero__eyebrow {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--sand);
}

.page-about .about-hero__title {
  margin: 0 0 20px;
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: clamp(34px, 5.4vw, 68px);
  line-height: 1.12;
  letter-spacing: .01em;
  color: var(--ink);
}

.page-about .about-hero__lede {
  margin: 0 0 clamp(26px, 4vw, 40px);
  max-width: 44em;
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.85;
  color: var(--brown);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 20px;
}

.page-about .about-fact {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-left: 12px;
  border-left: 2px solid var(--gold);
}

.page-about .about-fact__num {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(24px, 3vw, 32px);
  line-height: 1.1;
  color: var(--sand);
}

.page-about .about-fact__label {
  font-size: 13px;
  letter-spacing: .05em;
  color: var(--brown);
}

/* ---------- 章节索引条 ---------- */
.page-about .about-index {
  background: var(--white);
  border-bottom: 1px solid rgba(139, 90, 43, .16);
  margin-top: clamp(26px, 4vw, 44px);
}

.page-about .about-index__inner {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 12px 0;
  display: flex;
  gap: 8px;
  min-width: max-content;
}

.page-about .about-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 16px;
  border-radius: 999px;
  background: var(--blue-mist);
  color: var(--brown);
  font-size: 14px;
  text-decoration: none;
  white-space: nowrap;
  transition: transform .28s var(--ease), background-color .28s var(--ease), color .28s var(--ease);
}

.page-about .about-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--sand);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  background: var(--gold-soft);
  transform: translateY(-2px);
}

/* ---------- 通用章节 ---------- */
.page-about .about-section {
  padding: clamp(52px, 8vw, 112px) 0;
}

.page-about .about-section__inner {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-about .chapter__index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--sand);
  margin: 0 0 14px;
}

.page-about .chapter__title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: clamp(27px, 3.6vw, 46px);
  line-height: 1.22;
  color: var(--ink);
  max-width: 20em;
}

.page-about .chapter__lede {
  margin: 16px 0 0;
  max-width: 42em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--brown);
}

/* ---------- 品牌起点 ---------- */
.page-about .about-section--origin {
  background: var(--salt);
}

.page-about .origin-body p {
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.9;
  color: var(--brown);
  max-width: 46em;
}

.page-about .origin-lead {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(19px, 2.2vw, 26px);
  line-height: 1.7;
  color: var(--sand);
}

.page-about .origin-quote {
  position: relative;
  margin: 0;
  padding: 26px 24px 26px 30px;
  background: linear-gradient(120deg, var(--gold-soft), rgba(246, 227, 168, .35));
  border-radius: var(--radius-m) var(--radius-l) var(--radius-l) var(--radius-m);
}

.page-about .origin-quote::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22px;
  bottom: 22px;
  width: 4px;
  border-radius: 999px;
  background: var(--gold);
}

.page-about .origin-quote p {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(16px, 1.7vw, 19px);
  line-height: 1.75;
  color: var(--brown);
}

/* ---------- 四类访客 ---------- */
.page-about .about-section--who {
  background: var(--white);
}

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

.page-about .scene {
  position: relative;
  padding: 26px 22px 22px;
  background: var(--salt);
  border-radius: var(--radius-m);
  border-left: 3px solid var(--blue);
  transition: transform .35s var(--ease), box-shadow .35s var(--ease);
}

.page-about .scene:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-soft);
}

.page-about .scene__num {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: 34px;
  line-height: 1;
  color: var(--gold);
}

.page-about .scene__title {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 20px;
  line-height: 1.4;
  color: var(--ink);
}

.page-about .scene__text {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--brown);
}

.page-about .scene__tags {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .scene__tags .tag {
  background: var(--white);
  color: var(--blue-deep);
  border: 1px solid rgba(30, 144, 255, .28);
  border-radius: 999px;
  padding: 3px 11px;
  font-size: 12px;
}

/* ---------- 运营原则 ---------- */
.page-about .about-section--principles {
  background: linear-gradient(180deg, var(--salt) 0%, var(--blue-mist) 100%);
}

.page-about .principle-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 20px;
  counter-reset: none;
}

.page-about .principle {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  padding: clamp(20px, 3vw, 34px);
  background: var(--white);
  border-radius: var(--radius-l);
  box-shadow: 0 1px 0 rgba(59, 36, 18, .06);
}

.page-about .principle__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: var(--gold-soft);
  color: var(--sand);
  font-family: var(--font-serif);
  font-size: 26px;
  line-height: 1;
}

.page-about .principle__title {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(20px, 2.2vw, 26px);
  color: var(--ink);
}

.page-about .principle__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--brown);
}

/* ---------- 发展历程 ---------- */
.page-about .about-section--timeline {
  background: var(--salt);
}

.page-about .tl-figure {
  margin: 0;
  border-radius: var(--radius-l);
  overflow: hidden;
  background: var(--sand);
}

.page-about .tl-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .tl-figure .media__caption,
.page-about .team-figure .media__caption {
  padding: 10px 16px 12px;
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--brown);
  background: var(--gold-soft);
}

.page-about .tl {
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
  position: relative;
  display: grid;
  gap: 22px;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--gold), rgba(30, 144, 255, .55));
}

.page-about .tl-item {
  position: relative;
  padding: 18px 20px 16px;
  background: var(--white);
  border-radius: var(--radius-m);
  transition: transform .32s var(--ease), box-shadow .32s var(--ease);
}

.page-about .tl-item:hover,
.page-about .tl-item:focus-within {
  transform: translateY(-3px);
  box-shadow: var(--shadow-soft);
}

.page-about .tl-item__dot {
  position: absolute;
  left: -26px;
  top: 26px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--white);
  border: 3px solid var(--gold);
}

.page-about .tl-item__year {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--blue-deep);
}

.page-about .tl-item__title {
  margin: 0 0 8px;
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.42;
  color: var(--ink);
}

.page-about .tl-item__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--brown);
}

.page-about .tl-item__more {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--sand);
}

/* ---------- 团队与生态 ---------- */
.page-about .about-section--team {
  background: var(--white);
}

.page-about .team-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 36px);
  align-items: start;
}

.page-about .team-figure {
  margin: 0;
  border-radius: var(--radius-l);
  overflow: hidden;
  background: var(--blue-mist);
}

.page-about .team-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .team-body p {
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.9;
  color: var(--brown);
}

.page-about .team-stats {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.page-about .team-stats .stat {
  padding: 14px 12px;
  background: var(--blue-mist);
  border-radius: var(--radius-s);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .team-stats .stat__value {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: 28px;
  line-height: 1;
  color: var(--sand);
}

.page-about .team-stats .stat__label {
  font-size: 12.5px;
  letter-spacing: .05em;
  color: var(--brown);
}

.page-about .eco {
  margin-top: clamp(28px, 4vw, 48px);
  padding: clamp(22px, 3vw, 36px);
  background: linear-gradient(140deg, var(--gold-soft) 0%, rgba(245, 245, 245, .9) 58%, var(--blue-mist) 100%);
  border-radius: var(--radius-l);
  display: grid;
  gap: 22px;
}

.page-about .eco__hub {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  justify-self: start;
  padding: 16px 26px;
  background: var(--brown);
  border-radius: 999px;
}

.page-about .eco__hub-name {
  font-family: var(--font-serif);
  font-size: 19px;
  color: var(--gold-soft);
  letter-spacing: .04em;
}

.page-about .eco__hub-note {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: rgba(245, 245, 245, .78);
}

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

.page-about .eco__arm {
  position: relative;
  padding: 16px 18px 16px 26px;
  background: var(--white);
  border-radius: var(--radius-m);
  display: grid;
  gap: 2px;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}

.page-about .eco__arm::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 18px;
  bottom: 18px;
  width: 3px;
  border-radius: 999px;
  background: var(--blue);
}

.page-about .eco__arm:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-soft);
}

.page-about .eco__count {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: 26px;
  line-height: 1.1;
  color: var(--sand);
}

.page-about .eco__label {
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
}

.page-about .eco__desc {
  font-size: 13px;
  line-height: 1.7;
  color: var(--brown);
}

/* ---------- 问答 ---------- */
.page-about .about-section--qa {
  background: var(--salt);
}

.page-about .qa-list {
  display: grid;
  gap: 12px;
}

.page-about .qa-item {
  background: var(--white);
  border-radius: var(--radius-m);
  padding: 4px 20px;
  border-bottom: 1px solid rgba(139, 90, 43, .14);
}

.page-about .qa-item__q {
  cursor: pointer;
  list-style: none;
  padding: 16px 26px 16px 0;
  position: relative;
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(16px, 1.9vw, 19px);
  line-height: 1.55;
  color: var(--ink);
}

.page-about .qa-item__q::-webkit-details-marker {
  display: none;
}

.page-about .qa-item__q::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-sans);
  font-size: 22px;
  font-weight: 400;
  color: var(--gold);
  transition: transform .3s var(--ease);
}

.page-about .qa-item[open] .qa-item__q::after {
  content: "−";
}

.page-about .qa-item__a {
  padding: 0 0 18px;
  border-top: 1px solid rgba(139, 90, 43, .12);
  padding-top: 14px;
}

.page-about .qa-item__a p {
  margin: 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--brown);
}

/* ---------- 结尾行动区 ---------- */
.page-about .about-cta {
  padding: clamp(48px, 7vw, 96px) 0;
  background: var(--brown);
  color: var(--salt);
  border-radius: var(--radius-l) var(--radius-l) 0 0;
  position: relative;
  overflow: hidden;
}

.page-about .about-cta::before {
  content: "";
  position: absolute;
  right: -80px;
  top: -80px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(212, 160, 23, .38), rgba(212, 160, 23, 0) 70%);
  pointer-events: none;
}

.page-about .about-cta__inner {
  position: relative;
  display: grid;
  gap: 18px;
}

.page-about .about-cta__title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: clamp(26px, 3.4vw, 42px);
  line-height: 1.24;
  color: var(--gold-soft);
}

.page-about .about-cta__text {
  margin: 0;
  max-width: 46em;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(245, 245, 245, .88);
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 6px;
}

.page-about .about-cta__links .btn {
  border-radius: 999px;
  padding: 11px 22px;
  font-size: 14.5px;
  text-decoration: none;
  transition: transform .28s var(--ease), background-color .28s var(--ease), color .28s var(--ease);
}

.page-about .about-cta__links .btn:hover,
.page-about .about-cta__links .btn:focus-visible {
  transform: translateY(-2px);
}

.page-about .about-cta__links .btn--quiet {
  background: transparent;
  color: var(--gold-soft);
  border: 1px solid rgba(246, 227, 168, .45);
}

.page-about .about-cta__links .btn--quiet:hover,
.page-about .about-cta__links .btn--quiet:focus-visible {
  border-color: var(--gold-soft);
  background: rgba(246, 227, 168, .12);
}

.page-about :focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 3px;
  box-shadow: 0 0 0 6px rgba(212, 160, 23, .45);
  border-radius: 6px;
}

/* ---------- 断点 ---------- */
@media (min-width: 700px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .scene:nth-child(even) {
    margin-top: 26px;
  }

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

@media (min-width: 960px) {
  .page-about .about-hero {
    align-items: center;
    padding-right: calc(var(--pad) + 40px);
  }

  .page-about .about-hero::after {
    background:
      linear-gradient(96deg, rgba(245, 245, 245, .97) 0%, rgba(245, 245, 245, .94) 40%, rgba(245, 245, 245, .55) 66%, rgba(245, 245, 245, .04) 100%);
  }

  .page-about .about-hero__img {
    object-position: 78% 50%;
  }

  .page-about .about-index__list {
    min-width: 0;
    justify-content: space-between;
    flex-wrap: wrap;
    padding: 14px 0;
  }

  .page-about .about-section__inner {
    grid-template-columns: minmax(0, 320px) minmax(0, 1fr);
    align-items: start;
    column-gap: clamp(32px, 5vw, 80px);
  }

  .page-about .about-section__inner > .chapter {
    position: sticky;
    top: 96px;
  }

  .page-about .about-section--origin .origin-quote {
    grid-column: 2;
  }

  .page-about .about-section--who .scene-grid,
  .page-about .about-section--principles .principle-list,
  .page-about .about-section--timeline .tl-figure,
  .page-about .about-section--timeline .tl,
  .page-about .about-section--team .team-split,
  .page-about .about-section--team .eco,
  .page-about .about-section--qa .qa-list {
    grid-column: 2;
  }

  .page-about .tl {
    padding-left: 38px;
    gap: 26px;
  }

  .page-about .tl::before {
    left: 12px;
  }

  .page-about .tl-item {
    padding: 22px 26px 20px;
    max-width: 44em;
  }

  .page-about .tl-item__dot {
    left: -38px;
    top: 32px;
  }

  .page-about .tl-item:nth-child(even) {
    margin-left: 54px;
  }

  .page-about .tl-item__more {
    max-height: 0;
    opacity: 0;
    transform: translateY(-4px);
    overflow: hidden;
    transition: max-height .4s var(--ease), opacity .4s var(--ease), transform .4s var(--ease);
  }

  .page-about .tl-item:hover .tl-item__more,
  .page-about .tl-item:focus-within .tl-item__more {
    max-height: 160px;
    opacity: 1;
    transform: translateY(0);
  }

  .page-about .team-split {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: center;
  }

  .page-about .eco {
    grid-template-columns: minmax(0, 220px) minmax(0, 1fr);
    align-items: center;
    gap: 32px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    animation-duration: .001ms !important;
    transition-duration: .001ms !important;
  }

  .page-about [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }

  .page-about .tl-item__more {
    max-height: none;
    opacity: 1;
    transform: none;
  }
}
<<<END>>>