.page-about {
  --ab-ink: var(--vip-slate);
  --ab-line: var(--vip-hair);
  --ab-shell-gap: 30px;
  --ab-radius: var(--vip-r-lg);
  background: var(--vip-ivory);
  color: var(--ab-ink);
}

.page-about *,
.page-about *::before,
.page-about *::after {
  box-sizing: border-box;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  overflow: hidden;
  padding-block: 20px clamp(40px, 6vw, 72px);
  color: var(--vip-ivory);
  background:
    radial-gradient(130% 92% at 8% -10%, #71253a 0%, rgba(113, 37, 58, 0) 62%),
    linear-gradient(158deg, var(--vip-wine) 4%, var(--vip-wine-deep) 100%);
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(198, 154, 75, .16) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(198, 154, 75, .16) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .95), rgba(0, 0, 0, .18));
}

.page-about .ab-hero > .vip-container {
  position: relative;
  z-index: 1;
}

.page-about .ab-hero .vip-breadcrumb {
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-about .ab-hero .vip-breadcrumb__link,
.page-about .ab-hero .vip-breadcrumb__sep,
.page-about .ab-hero .vip-breadcrumb__here {
  color: rgba(247, 243, 238, .74);
}

.page-about .ab-hero .vip-breadcrumb__link:hover {
  color: var(--vip-gold-soft);
}

.page-about .ab-hero .vip-eyebrow {
  color: var(--vip-gold);
  font-family: var(--vip-italic);
  font-style: italic;
  letter-spacing: .16em;
}

.page-about .ab-hero__frame {
  position: relative;
  display: grid;
  gap: 24px;
  padding: clamp(20px, 3.4vw, 34px) 0 0;
}

.page-about .ab-hero__arch {
  width: min(300px, 74%);
  height: auto;
  color: var(--vip-gold);
  opacity: .62;
  justify-self: center;
  margin-bottom: -8px;
}

.page-about .ab-hero h1 {
  margin: .3em 0 0;
  font-family: var(--vip-serif);
  font-weight: 400;
  font-size: clamp(29px, 5.2vw, 58px);
  line-height: 1.16;
  letter-spacing: .012em;
  color: var(--vip-ivory);
  max-width: 20ch;
}

.page-about .ab-hero__lede {
  margin: 20px 0 0;
  max-width: 56ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.92;
  color: rgba(247, 243, 238, .8);
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .ab-stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: clamp(32px, 5vw, 56px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid rgba(198, 154, 75, .34);
}

.page-about .ab-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 4px 4px;
  border-bottom: 1px solid rgba(198, 154, 75, .18);
}

.page-about .ab-stat__num {
  font-family: var(--vip-italic);
  font-style: italic;
  font-size: clamp(30px, 5vw, 44px);
  line-height: 1;
  color: var(--vip-gold-soft);
  letter-spacing: .01em;
}

.page-about .ab-stat__label {
  font-size: 13.5px;
  line-height: 1.72;
  color: rgba(247, 243, 238, .72);
  max-width: 30ch;
}

/* ---------- 主体骨架 ---------- */
.page-about .ab-shell {
  padding-block: clamp(40px, 6vw, 88px);
  display: grid;
  gap: var(--ab-shell-gap);
}

.page-about .ab-index {
  border: 1px solid var(--ab-line);
  border-radius: var(--vip-r-md);
  background: linear-gradient(180deg, #fffdfa, var(--vip-sand));
  padding: 16px;
}

.page-about .ab-index__title {
  margin: 0 0 10px;
  font-family: var(--vip-italic);
  font-style: italic;
  font-size: 12px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--vip-wine);
}

.page-about .ab-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .ab-index__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
  padding: 8px 14px;
  border-radius: var(--vip-r-pill);
  border: 1px solid var(--ab-line);
  background: rgba(255, 255, 255, .72);
  font-size: 13.5px;
  line-height: 1;
  color: var(--ab-ink);
  text-decoration: none;
  transition: color .3s var(--vip-ease), border-color .3s var(--vip-ease), transform .3s var(--vip-ease);
}

.page-about .ab-index__link:hover {
  color: var(--vip-wine);
  border-color: var(--vip-wine);
  transform: translateY(-2px);
}

.page-about .ab-index__no {
  font-family: var(--vip-italic);
  font-style: italic;
  font-size: 11.5px;
  color: var(--vip-gold);
}

.page-about .ab-flow {
  display: grid;
  gap: clamp(38px, 6vw, 76px);
  min-width: 0;
}

/* ---------- 章节通用 ---------- */
.page-about .ab-sec {
  scroll-margin-top: 96px;
  min-width: 0;
}

.page-about .ab-sec__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--ab-line);
}

.page-about .ab-sec__idx {
  font-family: var(--vip-italic);
  font-style: italic;
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--vip-gold);
  padding: 3px 8px;
  border: 1px solid var(--ab-line);
  border-radius: var(--vip-r-pill);
  transition: background .35s var(--vip-ease), color .35s var(--vip-ease), border-color .35s var(--vip-ease);
}

.page-about .ab-sec:target .ab-sec__idx {
  background: var(--vip-cyan);
  border-color: var(--vip-cyan);
  color: #06322e;
}

.page-about .ab-sec__title {
  margin: 0;
  font-family: var(--vip-serif);
  font-weight: 400;
  font-size: clamp(22px, 3.2vw, 34px);
  line-height: 1.34;
  color: var(--vip-wine);
  letter-spacing: .01em;
}

.page-about .ab-sec__lede {
  margin: 20px 0 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.92;
  color: #55504f;
}

.page-about .ab-sec--sand {
  border-radius: var(--ab-radius);
  background: linear-gradient(160deg, rgba(232, 223, 211, .82), rgba(247, 243, 238, .5));
  padding: clamp(22px, 3.6vw, 38px);
  border: 1px solid var(--ab-line);
}

.page-about .ab-sec--wine {
  border-radius: var(--ab-radius);
  padding: clamp(22px, 3.6vw, 40px);
  background:
    radial-gradient(120% 100% at 100% 0%, #6d2337 0%, rgba(109, 35, 55, 0) 58%),
    linear-gradient(150deg, var(--vip-wine) 0%, var(--vip-wine-deep) 100%);
  color: var(--vip-ivory);
}

.page-about .ab-sec--wine .ab-sec__head {
  border-bottom-color: rgba(198, 154, 75, .34);
}

.page-about .ab-sec--wine .ab-sec__title {
  color: var(--vip-ivory);
}

.page-about .ab-sec--wine .ab-sec__idx {
  border-color: rgba(198, 154, 75, .5);
  color: var(--vip-gold-soft);
}

.page-about .ab-sec--wine .ab-sec__lede {
  color: rgba(247, 243, 238, .78);
}

/* ---------- 01 源起 ---------- */
.page-about .ab-origin {
  display: grid;
  gap: 26px;
  margin-top: 24px;
}

.page-about .ab-origin__text p {
  margin: 0 0 16px;
  font-size: 15.5px;
  line-height: 1.94;
  color: #55504f;
}

.page-about .ab-quote {
  margin: 24px 0 0;
  padding: 18px 20px 18px 22px;
  border-left: 3px solid var(--vip-gold);
  border-radius: 0 var(--vip-r-md) var(--vip-r-md) 0;
  background: rgba(232, 223, 211, .55);
}

.page-about .ab-quote p {
  margin: 0;
  font-family: var(--vip-serif);
  font-size: 16.5px;
  line-height: 1.86;
  color: var(--vip-wine);
}

.page-about .ab-origin__media {
  margin: 0;
}

.page-about .vip-media__caption {
  margin: 10px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: #7a7370;
}

/* ---------- 02 人群 ---------- */
.page-about .ab-aud__media {
  margin: 26px 0 0;
}

.page-about .ab-aud {
  display: grid;
  gap: 16px;
  margin-top: 26px;
}

.page-about .ab-aud__card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px;
}

.page-about .ab-aud__card h3 {
  margin: 0;
  font-family: var(--vip-serif);
  font-weight: 400;
  font-size: 18px;
  line-height: 1.5;
  color: var(--vip-wine);
}

.page-about .ab-aud__card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.88;
  color: #585352;
}

/* ---------- 03 内容主线 ---------- */
.page-about .ab-cols {
  display: grid;
  gap: 16px;
  margin-top: 26px;
}

.page-about .ab-col {
  display: grid;
  gap: 10px;
  padding: 22px;
  text-decoration: none;
  color: inherit;
  border-radius: var(--vip-r-md);
  transition: transform .38s var(--vip-ease), box-shadow .38s var(--vip-ease), border-color .38s var(--vip-ease);
}

.page-about .ab-col:hover,
.page-about .ab-col:focus-visible {
  transform: translateY(-5px);
  box-shadow: var(--vip-shadow);
  border-color: var(--vip-gold);
}

.page-about .ab-col__no {
  font-family: var(--vip-italic);
  font-style: italic;
  font-size: 12.5px;
  letter-spacing: .18em;
  color: var(--vip-terra);
}

.page-about .ab-col__title {
  margin: 0;
  font-family: var(--vip-serif);
  font-weight: 400;
  font-size: 19px;
  line-height: 1.46;
  color: var(--vip-wine);
}

.page-about .ab-col__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.88;
  color: #585352;
}

.page-about .ab-col__more {
  margin-top: 4px;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--vip-blue);
}

.page-about .ab-col:hover .ab-col__more {
  color: var(--vip-terra);
}

/* ---------- 04 时间轴 ---------- */
.page-about .ab-time {
  position: relative;
  margin: 28px 0 0;
  padding: 0 0 0 26px;
  list-style: none;
  border-left: 1px solid var(--ab-line);
}

.page-about .ab-time__item {
  position: relative;
  padding-bottom: 30px;
}

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

.page-about .ab-time__dot {
  position: absolute;
  left: -32px;
  top: 7px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--vip-ivory);
  border: 2px solid var(--vip-gold);
}

.page-about .ab-time__item:last-child .ab-time__dot {
  background: var(--vip-red);
  border-color: var(--vip-red);
}

.page-about .ab-time__when {
  margin: 0 0 4px;
  font-family: var(--vip-italic);
  font-style: italic;
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--vip-blue);
}

.page-about .ab-time__title {
  margin: 0 0 8px;
  font-family: var(--vip-serif);
  font-weight: 400;
  font-size: 18.5px;
  line-height: 1.5;
  color: var(--vip-wine);
}

.page-about .ab-time__text {
  margin: 0;
  font-size: 14.8px;
  line-height: 1.9;
  color: #585352;
}

.page-about .ab-time__more {
  margin-top: 12px;
  border: 1px dashed var(--ab-line);
  border-radius: var(--vip-r-sm);
  padding: 10px 14px;
  background: rgba(255, 255, 255, .6);
}

.page-about .ab-time__more > summary {
  cursor: pointer;
  list-style: none;
  font-size: 13.5px;
  letter-spacing: .03em;
  color: var(--vip-wine);
}

.page-about .ab-time__more > summary::-webkit-details-marker {
  display: none;
}

.page-about .ab-time__more > summary::after {
  content: " +";
  color: var(--vip-terra);
}

.page-about .ab-time__more[open] > summary::after {
  content: " −";
}

.page-about .ab-time__more > p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.88;
  color: #5d5756;
}

/* ---------- 05 团队 ---------- */
.page-about .ab-team {
  display: grid;
  gap: 26px;
  margin-top: 24px;
}

.page-about .ab-team__body p {
  margin: 0 0 16px;
  font-size: 15.4px;
  line-height: 1.94;
  color: #55504f;
}

.page-about .ab-team__list {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .ab-team__list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding: 12px 14px;
  border-radius: var(--vip-r-sm);
  background: rgba(255, 255, 255, .72);
  border: 1px solid rgba(198, 154, 75, .28);
  font-size: 14.3px;
  line-height: 1.82;
  color: #575150;
}

.page-about .ab-team__k {
  font-family: var(--vip-serif);
  font-size: 13.5px;
  color: var(--vip-green);
  white-space: nowrap;
}

.page-about .ab-team__media {
  margin: 0;
}

/* ---------- 06 服务标准 ---------- */
.page-about .ab-promise {
  display: grid;
  gap: 1px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid rgba(198, 154, 75, .3);
}

.page-about .ab-promise__item {
  display: grid;
  gap: 8px;
  padding: 20px 0;
  border-bottom: 1px solid rgba(198, 154, 75, .22);
}

.page-about .ab-promise__num {
  font-family: var(--vip-italic);
  font-style: italic;
  font-size: 12.5px;
  letter-spacing: .2em;
  color: var(--vip-gold);
}

.page-about .ab-promise__title {
  margin: 0;
  font-family: var(--vip-serif);
  font-weight: 400;
  font-size: 18.5px;
  line-height: 1.48;
  color: var(--vip-ivory);
}

.page-about .ab-promise__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.9;
  color: rgba(247, 243, 238, .76);
  max-width: 58ch;
}

.page-about .ab-cta {
  display: grid;
  gap: 16px;
  margin-top: 30px;
  padding: 22px;
  border-radius: var(--vip-r-md);
  border: 1px solid rgba(198, 154, 75, .42);
  background: rgba(58, 14, 25, .34);
}

.page-about .ab-cta__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.86;
  color: rgba(247, 243, 238, .86);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .ab-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
  }

  .page-about .ab-stat {
    padding: 20px 18px 6px;
    border-bottom: 1px solid rgba(198, 154, 75, .18);
    border-left: 1px solid rgba(198, 154, 75, .18);
  }

  .page-about .ab-stat:first-child {
    border-left: 0;
    padding-left: 0;
  }

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

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

  .page-about .ab-team__list li {
    grid-template-columns: 96px minmax(0, 1fr);
  }
}

@media (min-width: 960px) {
  .page-about .ab-hero {
    padding-block: 26px clamp(56px, 6vw, 84px);
  }

  .page-about .ab-hero__frame {
    grid-template-columns: minmax(0, 1fr) 280px;
    align-items: end;
    gap: 40px;
  }

  .page-about .ab-hero__arch {
    grid-column: 2;
    grid-row: 1;
    width: 100%;
    max-width: 280px;
    justify-self: end;
    align-self: end;
    margin-bottom: 0;
    order: 2;
  }

  .page-about .ab-hero__copy {
    grid-column: 1;
    grid-row: 1;
    max-width: 60ch;
  }

  .page-about .ab-shell {
    grid-template-columns: 214px minmax(0, 1fr);
    gap: clamp(34px, 4vw, 60px);
    align-items: start;
  }

  .page-about .ab-index {
    position: sticky;
    top: 28px;
    padding: 20px 16px;
  }

  .page-about .ab-index__list {
    flex-direction: column;
    gap: 4px;
    overflow: visible;
  }

  .page-about .ab-index__link {
    border-radius: var(--vip-r-sm);
    border-color: transparent;
    background: transparent;
    padding: 9px 10px;
    width: 100%;
    justify-content: flex-start;
  }

  .page-about .ab-index__link:hover {
    border-color: var(--ab-line);
    background: rgba(255, 255, 255, .8);
  }

  .page-about .ab-origin {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: 40px;
    align-items: start;
  }

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

  .page-about .ab-cols {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .ab-team {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .ab-team__media {
    margin-top: 26px;
  }

  .page-about .ab-promise__item {
    grid-template-columns: 72px minmax(0, 1fr);
    column-gap: 20px;
    align-items: start;
  }

  .page-about .ab-promise__num {
    grid-row: 1 / span 2;
    padding-top: 4px;
  }

  .page-about .ab-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 24px;
    padding: 24px 26px;
  }
}

@media (min-width: 1180px) {
  .page-about .ab-hero__frame {
    grid-template-columns: minmax(0, 1fr) 320px;
  }

  .page-about .ab-cols {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .ab-col {
    padding: 24px 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-index__link,
  .page-about .ab-col,
  .page-about .ab-sec__idx {
    transition: none;
  }

  .page-about .ab-col:hover,
  .page-about .ab-col:focus-visible,
  .page-about .ab-index__link:hover {
    transform: none;
  }
}
<<<END>>>

需要确认一下：你要求里提到的 `<<<END>>>` 不在最初指定的两个标记里，但我按你输入的结构补齐了收尾。如果不需要 `<<<END>>>`，直接删掉最后这一行就行。