.page-about {
  --about-rule: 3px;
  --about-gap: clamp(20px, 3.4vw, 40px);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  line-height: 1.75;
  overflow-x: clip;
}

.page-about .breadcrumb {
  padding-top: clamp(14px, 2.4vw, 24px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--stone);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.page-about .breadcrumb a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 2px solid var(--gold-light);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .breadcrumb a:hover {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

/* ---------- 首屏 ---------- */
.page-about .hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 52px);
  padding-top: clamp(22px, 4vw, 46px);
  padding-bottom: clamp(36px, 6vw, 76px);
}

.page-about .about-hero .eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--gold);
  margin: 0;
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 7.4vw, 82px);
  line-height: 1.06;
  letter-spacing: -.02em;
  margin: 12px 0 0;
  color: var(--ink);
}

.page-about .hero-lead {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  font-size: clamp(16px, 1.7vw, 18px);
  line-height: 1.8;
  max-width: 40em;
  color: var(--ink);
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .hero-side {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-about .hero-card {
  border: var(--about-rule) solid var(--ink);
  background: var(--pulp);
  box-shadow: var(--shadow-hard);
  padding: clamp(16px, 2.4vw, 22px);
}

.page-about .hero-card-title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 20px;
  letter-spacing: .04em;
  border-bottom: var(--about-rule) solid var(--gold);
  padding-bottom: 8px;
}

.page-about .hero-facts {
  margin: 0;
  display: grid;
  gap: 10px;
}

.page-about .hero-facts div {
  display: grid;
  gap: 2px;
}

.page-about .hero-facts dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--stone);
}

.page-about .hero-facts dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink);
}

.page-about .hero-index {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
  border-top: var(--about-rule) solid var(--ink);
}

.page-about .hero-index li {
  border-bottom: 2px solid rgba(21, 24, 21, .16);
}

.page-about .hero-index a {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 10px 4px;
  text-decoration: none;
  color: var(--ink);
  font-size: 14px;
  transition: background var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.page-about .hero-index a span {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gold);
}

.page-about .hero-index a:hover {
  background: var(--apple);
  padding-left: 10px;
}

/* ---------- 章节骨架 ---------- */
.page-about .about-section {
  border-top: var(--about-rule) solid var(--ink);
  padding: clamp(34px, 5.5vw, 74px) 0;
}

.page-about .section-head {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 18px;
  align-items: start;
  margin-bottom: var(--about-gap);
}

.page-about .about-mark {
  display: none;
}

.page-about .section-num {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(46px, 9vw, 100px);
  line-height: .78;
  letter-spacing: -.04em;
  color: var(--gold);
}

.page-about .section-head-body h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(23px, 3.6vw, 38px);
  line-height: 1.2;
  letter-spacing: -.01em;
  margin: 0 0 10px;
  color: var(--ink);
}

.page-about .section-head-body p {
  margin: 0;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  max-width: 62ch;
  color: var(--ink);
}

/* ---------- 图片 ---------- */
.page-about .about-photo {
  margin: 0;
  border: var(--about-rule) solid var(--ink);
  background: var(--pulp);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
}

.page-about .about-photo img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  clip-path: polygon(0 0, calc(100% - 36px) 0, 100% 36px, 100% 100%, 0 100%);
}

.page-about .about-photo figcaption {
  padding: 10px 14px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink);
  border-top: var(--about-rule) solid var(--ink);
  background: var(--pulp);
}

/* ---------- 01 起源 ---------- */
.page-about .origin-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
}

.page-about .origin-text p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.85;
  max-width: 60ch;
}

.page-about .origin-quote {
  margin: 22px 0 0;
  padding: 18px 20px;
  border-left: 8px solid var(--gold);
  background: var(--apple);
  color: var(--ink);
  box-shadow: 6px 6px 0 var(--ink);
}

.page-about .origin-quote p {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(18px, 2.3vw, 23px);
  line-height: 1.5;
  letter-spacing: .01em;
  max-width: none;
}

/* ---------- 02 时间轴 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 10px;
  bottom: 14px;
  width: var(--about-rule);
  background: var(--mist);
}

.page-about .tl-item {
  position: relative;
  padding-left: 42px;
  margin-bottom: 14px;
}

.page-about .tl-node {
  position: absolute;
  left: 0;
  top: 14px;
  width: 25px;
  height: 25px;
  border-radius: 50%;
  border: var(--about-rule) solid var(--ink);
  background: var(--paper);
  box-shadow: 0 0 0 4px var(--paper);
  transition: background var(--dur) var(--ease), transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .tl-item:hover .tl-node,
.page-about .tl-item:focus-within .tl-node {
  background: var(--gold);
  border-color: var(--gold);
  transform: scale(1.18);
}

.page-about .tl-card {
  border: var(--about-rule) solid var(--ink);
  background: var(--paper);
  transition: box-shadow var(--dur) var(--ease), transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .tl-card[open] {
  background: var(--pulp);
  box-shadow: 6px 6px 0 var(--gold-light);
}

.page-about .tl-card summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding: 14px 16px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(16px, 2vw, 20px);
  line-height: 1.4;
}

.page-about .tl-card summary::-webkit-details-marker {
  display: none;
}

.page-about .tl-card summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-weight: 400;
  color: var(--rose);
  transition: transform var(--dur) var(--ease);
}

.page-about .tl-card[open] summary::after {
  content: "–";
  transform: rotate(180deg);
}

.page-about .tl-year {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: .1em;
  color: var(--ink);
  background: var(--gold-light);
  padding: 3px 8px;
  white-space: nowrap;
}

.page-about .tl-card p {
  margin: 0;
  padding: 0 16px 16px;
  font-size: 15px;
  line-height: 1.8;
  max-width: 62ch;
  color: var(--ink);
}

/* ---------- 03 团队 ---------- */
.page-about .team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .team-card {
  outline: none;
}

.page-about .team-inner {
  display: flex;
  flex-direction: column;
  border: var(--about-rule) solid var(--ink);
  background: var(--paper);
  box-shadow: var(--shadow-hard);
}

.page-about .team-face {
  padding: 18px;
}

.page-about .team-front {
  background: var(--pulp);
}

.page-about .team-tag {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--stone);
}

.page-about .team-front h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 21px;
  line-height: 1.25;
}

.page-about .team-hint {
  margin: 0;
  font-size: 12px;
  color: var(--stone);
  font-family: var(--font-mono);
}

.page-about .team-back {
  border-top: var(--about-rule) solid var(--ink);
  background: var(--ink);
  color: var(--paper);
}

.page-about .team-back p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
}

.page-about .reach-strip {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: var(--about-gap);
}

.page-about .reach-item {
  border: var(--about-rule) solid var(--ink);
  background: var(--paper);
  padding: 14px 16px;
  box-shadow: 5px 5px 0 var(--paper), 5px 5px 0 3px var(--ink);
}

.page-about .reach-num {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 4.6vw, 44px);
  line-height: 1;
  color: var(--gold);
}

.page-about .reach-label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--stone);
}

/* ---------- 04 索引 ---------- */
.page-about .index-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
}

.page-about .stat-strip {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.page-about .stat {
  border: var(--about-rule) solid var(--ink);
  background: var(--pulp);
  padding: 16px 16px 14px;
  box-shadow: 5px 5px 0 var(--gold-light);
}

.page-about .stat-num {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 4.6vw, 50px);
  line-height: 1;
  letter-spacing: -.03em;
}

.page-about .stat-label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  color: var(--stone);
}

.page-about .stat--apple {
  background: var(--apple);
  box-shadow: 5px 5px 0 var(--ink);
}

.page-about .stat--apple .stat-label {
  color: var(--ink);
}

.page-about .stat--ink {
  background: var(--ink);
  box-shadow: 5px 5px 0 var(--apple);
}

.page-about .stat--ink .stat-num {
  color: var(--paper);
}

.page-about .stat--ink .stat-label {
  color: var(--pulp);
}

.page-about .index-points {
  list-style: none;
  margin: var(--about-gap) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .index-points li {
  border-left: 6px solid var(--gold);
  padding: 2px 0 2px 14px;
  font-size: 15px;
  line-height: 1.8;
}

.page-about .index-points strong {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 16px;
  margin-right: 2px;
}

.page-about .index-note {
  margin: var(--about-gap) 0 0;
  padding: 14px 16px;
  border: var(--about-rule) dashed var(--gold);
  font-size: 14px;
  line-height: 1.75;
  background: rgba(230, 195, 122, .18);
}

.page-about .index-note a,
.page-about .partner-text a {
  color: var(--ink);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 2px solid var(--rose);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .index-note a:hover,
.page-about .partner-text a:hover {
  color: var(--rose);
  border-bottom-color: var(--ink);
}

/* ---------- 05 合作 ---------- */
.page-about .partner-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
}

.page-about .honor-list {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .honor-list li {
  display: grid;
  gap: 3px;
  border: var(--about-rule) solid var(--ink);
  background: var(--paper);
  padding: 12px 14px;
  font-size: 15px;
  line-height: 1.65;
  transition: background var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .honor-list li:hover {
  background: var(--pulp);
  transform: translateX(4px);
}

.page-about .honor-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--gold);
}

.page-about .partner-text > p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  max-width: 60ch;
}

/* ---------- 收束 ---------- */
.page-about .about-cta {
  margin-top: clamp(30px, 5vw, 60px);
  background: var(--ink);
  color: var(--paper);
  border-top: var(--about-rule) solid var(--gold);
  border-bottom: var(--about-rule) solid var(--gold);
  padding: clamp(30px, 5vw, 58px) 0;
}

.page-about .cta-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(18px, 3vw, 30px);
  align-items: center;
}

.page-about .cta-copy h2 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 3.4vw, 34px);
  line-height: 1.25;
  color: var(--paper);
}

.page-about .cta-copy p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  max-width: 46ch;
  color: var(--pulp);
}

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

.page-about .about-cta .btn-ghost {
  color: var(--paper);
  border-color: var(--paper);
  background: transparent;
}

.page-about .about-cta .btn-ghost:hover {
  background: var(--paper);
  color: var(--ink);
  border-color: var(--gold);
}

.page-about .about-seal {
  margin: clamp(26px, 4vw, 44px) 0 clamp(30px, 5vw, 56px);
  display: inline-flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding: 10px 16px;
  border: var(--about-rule) double var(--gold);
  transform: rotate(-2deg);
  background: var(--paper);
}

.page-about .seal-brand {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 15px;
  letter-spacing: .12em;
  color: var(--gold);
}

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

/* ---------- 桌面布局 ---------- */
@media (min-width: 900px) {
  .page-about .hero-grid {
    grid-template-columns: 1.3fr .78fr;
    align-items: start;
  }

  .page-about .section-head {
    grid-template-columns: 30px auto 1fr;
    gap: 6px 26px;
  }

  .page-about .about-mark {
    display: block;
    writing-mode: vertical-rl;
    text-orientation: mixed;
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: .34em;
    color: var(--stone);
    padding-top: 8px;
    transition: color var(--dur) var(--ease);
  }

  .page-about .about-section:hover .about-mark {
    color: var(--gold);
  }

  .page-about .origin-grid {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }

  .page-about .origin-grid .about-photo {
    margin-top: 26px;
  }

  .page-about .index-grid {
    grid-template-columns: .92fr 1fr;
    align-items: start;
  }

  .page-about .stat-strip {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .partner-grid {
    grid-template-columns: 1.05fr .85fr;
    align-items: start;
  }

  .page-about .partner-grid .about-photo {
    margin-top: 22px;
  }

  .page-about .cta-inner {
    grid-template-columns: 1.2fr auto;
  }

  .page-about .reach-strip {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .about-timeline::before {
    left: 13px;
  }

  .page-about .tl-node {
    width: 29px;
    height: 29px;
    left: -2px;
  }

  .page-about .tl-item {
    padding-left: 52px;
  }

  /* 团队卡片翻转 */
  .page-about .team-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .team-inner {
    position: relative;
    min-height: 232px;
    transform-style: preserve-3d;
    transition: transform 280ms var(--ease);
  }

  .page-about .team-card:hover .team-inner,
  .page-about .team-card:focus-within .team-inner,
  .page-about .team-card:focus .team-inner {
    transform: rotateY(180deg);
  }

  .page-about .team-face {
    position: absolute;
    inset: 0;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    overflow: hidden;
  }

  .page-about .team-back {
    transform: rotateY(180deg);
    border-top: 0;
    justify-content: center;
  }
}

@media (min-width: 560px) and (max-width: 899px) {
  .page-about .team-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about .stat-strip {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl-node,
  .page-about .honor-list li,
  .page-about .hero-index a,
  .page-about .team-inner,
  .page-about .tl-card {
    transition: none;
  }
}
<<<END>>>