.page-about {
  --ab-body: #3B332C;
  --ab-card: #FFFCF5;
  --ab-line: 1px solid rgba(201, 151, 60, 0.5);
  --ab-hair: 1px solid rgba(217, 210, 196, 0.9);
  --ab-shadow: 0 22px 46px -36px rgba(23, 18, 15, 0.75);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
}

/* 面包屑 */
.page-about .about-crumbs {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 1rem var(--pad) .3rem;
  display: flex;
  align-items: center;
  gap: .55rem;
  font-size: .78rem;
  letter-spacing: .05em;
  color: var(--muted);
}
.page-about .about-crumbs a {
  color: var(--pine);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
}
.page-about .about-crumbs a:hover {
  border-bottom-color: var(--gold);
}
.page-about .about-crumbs__sep {
  color: var(--gold);
  font-size: .85rem;
  line-height: 1;
}

/* 首屏 */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(1.4rem, 5vw, 3.4rem) 0 clamp(2.2rem, 6vw, 4rem);
  background: linear-gradient(158deg, var(--paper) 0%, var(--paper) 54%, var(--paper-2) 100%);
  border-bottom: var(--ab-line);
}
.page-about .about-hero__shard {
  position: absolute;
  top: -28%;
  right: -22%;
  width: clamp(230px, 62vw, 520px);
  aspect-ratio: 1 / 1;
  background: var(--cinnabar);
  transform: rotate(16deg);
  border-radius: 6px;
  opacity: .9;
  pointer-events: none;
}
.page-about .about-hero__shard::after {
  content: "";
  position: absolute;
  inset: 10%;
  border: 1px solid rgba(232, 201, 127, 0.9);
  border-radius: 3px;
}
.page-about .about-hero__shard2 {
  position: absolute;
  bottom: -38%;
  left: -20%;
  width: clamp(160px, 44vw, 340px);
  aspect-ratio: 1 / 1;
  background: var(--sky);
  transform: rotate(12deg);
  opacity: .16;
  pointer-events: none;
}
.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}
.page-about .about-hero__kicker {
  display: flex;
  align-items: center;
  gap: .6rem;
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .16em;
  color: var(--cinnabar);
}
.page-about .about-hero__kicker::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--gold);
  flex: none;
}
.page-about .about-hero__title {
  margin: 0 0 1.1rem;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.5rem, 9vw, 4.4rem);
  line-height: 1.08;
  letter-spacing: -0.015em;
  color: var(--ink);
}
.page-about .about-hero__lead {
  margin: 0 0 1.7rem;
  max-width: 44ch;
  font-size: clamp(.98rem, 3.4vw, 1.08rem);
  line-height: 1.8;
  color: var(--ab-body);
}
.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: .6rem;
  max-width: 430px;
  padding-top: 1rem;
  border-top: var(--ab-line);
}
.page-about .about-fact {
  display: flex;
  flex-direction: column;
  gap: .15rem;
  min-width: 0;
}
.page-about .about-fact__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: clamp(1.25rem, 5vw, 1.65rem);
  letter-spacing: -0.02em;
  color: var(--cinnabar);
}
.page-about .about-fact__label {
  font-size: .72rem;
  letter-spacing: .07em;
  color: var(--muted);
}

/* 通用章节 */
.page-about .about-section {
  position: relative;
  padding: clamp(2.2rem, 6.5vw, 4.4rem) 0;
}
.page-about .about-section + .about-section {
  border-top: var(--ab-hair);
}
.page-about .about-section::before {
  content: "";
  position: absolute;
  top: 1.1rem;
  right: var(--pad);
  width: 46px;
  height: 46px;
  background: var(--gold);
  opacity: .13;
  clip-path: polygon(50% 0%, 61% 35%, 98% 35%, 68% 57%, 79% 91%, 50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 35%);
  pointer-events: none;
}
.page-about .about-eyebrow {
  display: flex;
  align-items: center;
  gap: .6rem;
  margin: 0 0 .75rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .16em;
  color: var(--sky);
}
.page-about .about-eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--gold);
  flex: none;
}
.page-about .about-h2 {
  margin: 0 0 .9rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.55rem, 5.6vw, 2.5rem);
  line-height: 1.24;
  letter-spacing: -0.005em;
  color: var(--ink);
}
.page-about .about-body {
  margin: 0 0 1em;
  max-width: 62ch;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--ab-body);
}
.page-about .about-body:last-child {
  margin-bottom: 0;
}

/* 起点与定位 */
.page-about .about-origin__grid {
  display: grid;
  gap: 1.7rem;
}
.page-about .about-origin__figure {
  margin: 0;
}
.page-about .about-origin__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border-radius: var(--radius);
  box-shadow: 14px 14px 0 -1px rgba(201, 151, 60, 0.18);
}
.page-about .about-origin__figure figcaption {
  margin-top: .8rem;
  padding-left: .65rem;
  border-left: 2px solid var(--gold);
  font-size: .78rem;
  line-height: 1.6;
  letter-spacing: .03em;
  color: var(--muted);
}
.page-about .about-points {
  list-style: none;
  margin: 1.3rem 0 0;
  padding: 0;
  display: grid;
  gap: .7rem;
}
.page-about .about-points li {
  position: relative;
  padding-left: 1.15rem;
  font-size: .94rem;
  line-height: 1.72;
  color: var(--ab-body);
}
.page-about .about-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .66em;
  width: 7px;
  height: 7px;
  background: var(--cinnabar);
  transform: rotate(45deg);
}

/* 历程 */
.page-about .about-journey__grid {
  display: grid;
  gap: 1.4rem;
  margin-top: 1.4rem;
}
.page-about .about-rail {
  list-style: none;
  margin: 0;
  padding: 0 0 .5rem;
  display: flex;
  gap: .45rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.page-about .about-rail::-webkit-scrollbar {
  display: none;
}
.page-about .about-rail__link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: .4rem;
  flex: none;
  padding: .42rem .78rem;
  border: 1px solid var(--stone);
  border-radius: 999px;
  text-decoration: none;
  color: var(--muted);
  background: transparent;
  transition: color .2s var(--ease-out), border-color .2s var(--ease-out), background .2s var(--ease-out);
}
.page-about .about-rail__year {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: .8rem;
  font-weight: 700;
}
.page-about .about-rail__label {
  font-size: .72rem;
  letter-spacing: .05em;
  white-space: nowrap;
}
.page-about .about-rail__link:hover {
  border-color: var(--gold);
  color: var(--ink);
}
.page-about .about-rail__link[aria-current="true"] {
  background: var(--cinnabar);
  border-color: var(--cinnabar);
  color: #FFF7EC;
}
.page-about .about-nodes {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}
.page-about .about-node {
  position: relative;
  padding: 1.15rem 1.15rem 1.3rem;
  background: var(--ab-card);
  border: 1px solid var(--stone);
  border-left: 3px solid var(--cinnabar);
  border-radius: var(--radius);
  box-shadow: var(--ab-shadow);
  scroll-margin-top: 104px;
  transition: transform .25s var(--ease-out), border-color .25s var(--ease-out), box-shadow .25s var(--ease-out);
}
.page-about .about-node:hover {
  transform: translateY(-4px);
  border-color: var(--gold);
  border-left-color: var(--cinnabar);
  box-shadow: var(--shadow-2);
}
.page-about .about-node__year {
  margin: 0 0 .45rem;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: clamp(1.35rem, 5vw, 1.9rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cinnabar);
}
.page-about .about-node:nth-child(2) .about-node__year {
  font-size: clamp(1.45rem, 5.4vw, 2.05rem);
}
.page-about .about-node:nth-child(3) .about-node__year {
  font-size: clamp(1.55rem, 5.8vw, 2.2rem);
}
.page-about .about-node:nth-child(4) .about-node__year {
  font-size: clamp(1.65rem, 6.2vw, 2.35rem);
}
.page-about .about-node:nth-child(5) .about-node__year {
  font-size: clamp(1.75rem, 6.6vw, 2.5rem);
}
.page-about .about-node__title {
  margin: 0 0 .5rem;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.55;
  color: var(--ink);
}
.page-about .about-node__text {
  margin: 0;
  max-width: 54ch;
  font-size: .93rem;
  line-height: 1.76;
  color: var(--ab-body);
}
.page-about .about-texture {
  display: flex;
  align-items: center;
  gap: .9rem;
  margin: 1.4rem 0 0;
  padding-top: 1rem;
  border-top: var(--ab-line);
}
.page-about .about-texture img {
  flex: none;
  width: 74px;
  height: 74px;
  max-width: 100%;
  object-fit: cover;
  border: var(--ab-line);
  border-radius: var(--radius);
  opacity: .92;
}
.page-about .about-texture figcaption {
  font-size: .78rem;
  line-height: 1.65;
  letter-spacing: .03em;
  color: var(--muted);
}

/* 团队 */
.page-about .about-teams__figure {
  margin: 1.3rem 0 0;
}
.page-about .about-teams__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid var(--stone);
  border-radius: var(--radius);
}
.page-about .about-teams {
  display: grid;
  gap: .9rem;
  margin-top: 1.3rem;
}
.page-about .team-col {
  position: relative;
  padding: 1.15rem 1.1rem 1.3rem;
  background: var(--paper-2);
  border: 1px solid var(--stone);
  border-top: 3px solid var(--sky);
  border-radius: var(--radius);
  transition: transform .25s var(--ease-out), background .25s var(--ease-out), box-shadow .25s var(--ease-out);
}
.page-about .team-col:nth-child(1) {
  border-top-color: var(--cinnabar);
}
.page-about .team-col:nth-child(2) {
  border-top-color: var(--sky);
}
.page-about .team-col:nth-child(3) {
  border-top-color: var(--pine);
}
.page-about .team-col:hover {
  transform: translateY(-4px);
  background: var(--ab-card);
  box-shadow: 0 0 0 1px var(--gold), var(--ab-shadow);
}
.page-about .team-col__name {
  margin: 0 0 .7rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--ink);
}
.page-about .team-col__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .45rem;
  font-size: .9rem;
  line-height: 1.68;
  color: var(--ab-body);
}
.page-about .team-col__list li {
  position: relative;
  padding-left: .95rem;
}
.page-about .team-col__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--sky);
}
.page-about .team-col__flag {
  margin: 1rem 0 0;
  padding: .7rem .8rem;
  border-left: 2px solid var(--gold);
  background: rgba(169, 211, 224, 0.18);
  font-size: .85rem;
  line-height: 1.68;
  color: var(--pine);
  transition: background .25s var(--ease-out);
}
.page-about .team-col:hover .team-col__flag {
  background: rgba(232, 201, 127, 0.26);
}

/* 导航编排 */
.page-about .about-method__grid {
  display: grid;
  gap: 0;
  margin-top: 1.3rem;
  border-top: var(--ab-line);
}
.page-about .about-method__item {
  padding: 1.1rem 0;
  border-bottom: var(--ab-hair);
}
.page-about .about-method__no {
  display: block;
  margin-bottom: .35rem;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: .76rem;
  letter-spacing: .14em;
  color: var(--gold);
}
.page-about .about-method__title {
  margin: 0 0 .35rem;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ink);
}
.page-about .about-method__text {
  margin: 0;
  font-size: .92rem;
  line-height: 1.72;
  color: var(--ab-body);
}

/* 质量标准 */
.page-about .about-quality__grid {
  display: grid;
  gap: 1.2rem;
  margin-top: 1.3rem;
}
.page-about .about-quality__sub {
  margin: 0 0 .5rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--ink);
}
.page-about .about-check {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .about-check li {
  display: grid;
  grid-template-columns: 2.1rem minmax(0, 1fr);
  gap: .5rem;
  padding: .75rem 0;
  border-bottom: 1px dashed var(--stone);
  font-size: .93rem;
  line-height: 1.72;
  color: var(--ab-body);
}
.page-about .about-check li strong {
  color: var(--ink);
}
.page-about .about-check .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: .78rem;
  letter-spacing: .06em;
  color: var(--gold);
  padding-top: .3em;
}
.page-about .about-cadence {
  padding: 1.15rem 1.15rem 1.3rem;
  background: var(--pine);
  border-radius: var(--radius);
  color: var(--paper);
}
.page-about .about-cadence h3 {
  margin: 0 0 .7rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--gold-light);
}
.page-about .about-cadence ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .55rem;
  font-size: .9rem;
  line-height: 1.7;
}
.page-about .about-cadence li {
  position: relative;
  padding-left: 1rem;
}
.page-about .about-cadence li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .64em;
  width: 6px;
  height: 6px;
  background: var(--gold);
  transform: rotate(45deg);
}

/* 合作生态 */
.page-about .about-partners__list {
  list-style: none;
  margin: 1.3rem 0 0;
  padding: 0;
  display: grid;
  gap: .9rem;
}
.page-about .about-partners__list li {
  padding-top: .85rem;
  border-top: var(--ab-line);
  font-size: .93rem;
  line-height: 1.74;
  color: var(--ab-body);
}
.page-about .about-partners__list strong {
  display: block;
  margin-bottom: .35rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--ink);
}

/* 收束 */
.page-about .about-cta {
  background: linear-gradient(150deg, var(--paper-2) 0%, var(--paper) 58%, rgba(169, 211, 224, 0.55) 100%);
  border-top: var(--ab-line);
}
.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
  margin-top: 1.2rem;
}

/* 平板与桌面 */
@media (min-width: 860px) {
  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: clamp(1.8rem, 4vw, 3.4rem);
    align-items: start;
  }
  .page-about .about-quality__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    gap: clamp(1.6rem, 4vw, 3rem);
    align-items: start;
  }
  .page-about .about-partners__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.2rem;
  }
}

@media (min-width: 900px) {
  .page-about .about-nodes {
    gap: 1.2rem;
  }
  .page-about .about-node:nth-child(odd) {
    margin-right: clamp(0rem, 9vw, 7rem);
  }
  .page-about .about-node:nth-child(even) {
    margin-left: clamp(0rem, 9vw, 7rem);
  }
  .page-about .about-method__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-method__item {
    padding: 1.4rem 1.4rem 1.5rem 0;
  }
  .page-about .about-method__item:nth-child(odd) {
    border-right: var(--ab-hair);
  }
  .page-about .about-method__item:nth-child(even) {
    padding-left: 1.4rem;
    padding-right: 0;
  }
  .page-about .about-teams {
    grid-template-columns: 1.25fr 1fr 0.82fr;
    align-items: start;
    gap: 1rem;
  }
  .page-about .team-col:nth-child(2) {
    margin-top: 1.5rem;
  }
  .page-about .team-col:nth-child(3) {
    margin-top: 3rem;
  }
}

@media (min-width: 1024px) {
  .page-about .about-journey__grid {
    grid-template-columns: 205px minmax(0, 1fr);
    gap: clamp(2rem, 5vw, 4rem);
    align-items: start;
  }
  .page-about .about-journey__rail {
    position: sticky;
    top: 96px;
  }
  .page-about .about-rail {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding: 0;
    margin: 0;
    position: relative;
  }
  .page-about .about-rail::before {
    content: "";
    position: absolute;
    left: 6px;
    top: 1.2rem;
    bottom: 1.2rem;
    width: 2px;
    background: linear-gradient(180deg, var(--gold) 0%, var(--sky) 58%, var(--stone) 100%);
  }
  .page-about .about-rail__link {
    display: block;
    padding: .85rem 0 .85rem 1.9rem;
    border: 0;
    border-radius: 0;
    background: transparent;
    color: var(--muted);
  }
  .page-about .about-rail__link::before {
    content: "";
    position: absolute;
    left: 1px;
    top: 1.14rem;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--paper);
    border: 2px solid var(--stone);
    transition: background .2s var(--ease-out), border-color .2s var(--ease-out), box-shadow .2s var(--ease-out);
  }
  .page-about .about-rail__year {
    font-size: .88rem;
  }
  .page-about .about-rail__label {
    display: block;
    margin-top: .1rem;
    font-size: .72rem;
    color: var(--muted);
  }
  .page-about .about-rail__link:hover {
    background: transparent;
    color: var(--ink);
  }
  .page-about .about-rail__link[aria-current="true"] {
    background: transparent;
    color: var(--ink);
  }
  .page-about .about-rail__link[aria-current="true"] .about-rail__year {
    color: var(--cinnabar);
  }
  .page-about .about-rail__link[aria-current="true"]::before {
    background: var(--gold);
    border-color: var(--gold);
    box-shadow: 0 0 0 4px rgba(201, 151, 60, 0.2);
  }
}
<<<END>>>