.page-about {
  --ab-gold-line: rgba(201, 162, 39, .28);
  --ab-gold-soft: rgba(201, 162, 39, .1);
  --ab-index-w: 210px;
  background: var(--ink);
  color: var(--cream);
  padding-bottom: clamp(32px, 6vw, 72px);
  overflow-x: hidden;
}

.page-about a {
  color: var(--gold-bright);
  text-decoration: none;
  border-bottom: 1px solid rgba(232, 199, 102, .4);
}

.page-about a:hover,
.page-about a:focus-visible {
  color: var(--cream);
  border-bottom-color: var(--gold-bright);
}

.page-about [id] {
  scroll-margin-top: 96px;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(18px, 3vw, 32px) 0 clamp(34px, 6vw, 72px);
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  top: -14vw;
  right: -18vw;
  width: 78vw;
  height: 78vw;
  max-width: 780px;
  max-height: 780px;
  background: radial-gradient(circle at 68% 34%, rgba(201, 162, 39, .3), rgba(201, 162, 39, .06) 46%, transparent 72%);
  pointer-events: none;
}

.page-about .ab-scale-rule {
  position: relative;
  height: 10px;
  margin: 14px 0 clamp(20px, 4vw, 36px);
  background: repeating-linear-gradient(90deg, var(--gold) 0 1px, transparent 1px 18px);
  opacity: .55;
  border-bottom: 1px solid var(--ab-gold-line);
}

.page-about .ab-hero__inner {
  position: relative;
  display: grid;
  gap: clamp(26px, 5vw, 52px);
  align-items: end;
}

.page-about .ab-hero__text .eyebrow {
  display: block;
  margin-bottom: 14px;
}

.page-about .ab-hero h1 {
  margin: 0 0 18px;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(2rem, 6.2vw, var(--fs-3xl));
  line-height: 1.18;
  letter-spacing: -.01em;
  color: var(--cream);
}

.page-about .ab-hero__lead {
  max-width: 34em;
  margin: 0;
  font-size: clamp(1rem, 2.4vw, var(--fs-md));
  line-height: 1.78;
  color: rgba(243, 237, 226, .86);
}

.page-about .ab-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: clamp(22px, 4vw, 34px);
  padding-top: 18px;
  border-top: 1px solid var(--ab-gold-line);
}

.page-about .ab-stats__cell {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .ab-stats__num {
  font-family: var(--font-mono);
  font-size: clamp(1rem, 2.6vw, var(--fs-md));
  letter-spacing: .06em;
  color: var(--gold-bright);
}

.page-about .ab-stats__label {
  font-size: var(--fs-xs);
  line-height: 1.5;
  color: var(--smoke);
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 4vw, 32px);
}

.page-about .ab-hero__actions .btn {
  border-bottom: 0;
}

.page-about .ab-hero__figure {
  margin: 0;
  max-width: 420px;
}

.page-about .ab-frame {
  position: relative;
  border: 2px solid var(--gold);
  box-shadow: var(--shadow-hard);
  background: var(--slate);
  overflow: hidden;
}

.page-about .ab-frame--tall {
  aspect-ratio: 3 / 4;
}

.page-about .ab-frame img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(.82) brightness(.88);
}

.page-about .media__cap {
  display: block;
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: .06em;
  color: var(--smoke);
}

/* ---------- 主体两栏 ---------- */
.page-about .ab-body {
  display: grid;
  gap: clamp(20px, 4vw, 46px);
  padding-top: clamp(10px, 2vw, 20px);
}

/* 目录索引 */
.page-about .ab-index {
  border-top: 1px solid var(--ab-gold-line);
  border-bottom: 1px solid var(--ab-gold-line);
  padding: 12px 0;
}

.page-about .ab-index__cap {
  display: none;
}

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

.page-about .ab-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  white-space: nowrap;
  padding: 6px 10px;
  border: 1px solid var(--ab-gold-line);
  border-bottom: 1px solid var(--ab-gold-line);
  font-size: var(--fs-sm);
  color: rgba(243, 237, 226, .78);
}

.page-about .ab-index__link .mono {
  font-size: 11px;
  color: var(--gold);
  letter-spacing: .1em;
}

.page-about .ab-index__link:hover,
.page-about .ab-index__link:focus-visible {
  border-color: var(--gold-bright);
  color: var(--cream);
  background: var(--ab-gold-soft);
}

/* 内容块 */
.page-about .ab-content {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.page-about .ab-block {
  padding: clamp(30px, 5vw, 56px) 0;
  border-top: 1px solid var(--ab-gold-line);
}

.page-about .ab-block:first-child {
  border-top: 0;
  padding-top: clamp(12px, 2vw, 20px);
}

.page-about .ab-block .eyebrow {
  display: block;
  margin-bottom: 12px;
}

.page-about .ab-block h2 {
  margin: 0 0 20px;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.4rem, 4.2vw, var(--fs-xl));
  line-height: 1.3;
  color: var(--cream);
}

.page-about .ab-block__lead {
  max-width: 36em;
  margin: 0 0 24px;
  font-size: var(--fs-base);
  line-height: 1.8;
  color: rgba(243, 237, 226, .8);
}

/* 品牌陈述：首字下沉 */
.page-about .ab-stance p {
  max-width: 34em;
  margin: 0 0 1.2em;
  font-size: clamp(1rem, 2.5vw, var(--fs-md));
  line-height: 1.85;
  color: rgba(243, 237, 226, .88);
}

.page-about .ab-stance p:first-of-type::first-letter {
  float: left;
  margin: .06em .16em 0 0;
  font-family: var(--font-serif);
  font-size: 3.6em;
  line-height: .92;
  color: var(--gold-bright);
}

/* ---------- 三条标准 ---------- */
.page-about .ab-rules {
  display: grid;
  gap: 18px;
}

.page-about .ab-rule {
  position: relative;
  border: 2px solid var(--slate);
  background: var(--panel);
  padding: 18px 18px 4px;
  color: var(--gold);
  box-shadow: var(--shadow-soft);
}

.page-about .ab-rule__scale {
  display: block;
  width: 100%;
  height: 12px;
  margin-bottom: 6px;
  color: var(--gold);
  opacity: .7;
}

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

.page-about .ab-rule .ab-rule__btn {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 12px;
  width: 100%;
  background: none;
  border: 0;
  padding: 6px 0 12px;
  text-align: left;
  cursor: pointer;
  color: var(--cream);
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: 1.5;
}

.page-about .ab-rule__no {
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--gold);
  white-space: nowrap;
}

.page-about .ab-rule__title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.05rem, 3vw, var(--fs-md));
  line-height: 1.4;
}

.page-about .ab-rule .disclosure__icon {
  display: inline-block;
  font-size: var(--fs-md);
  line-height: 1;
  color: var(--gold-bright);
  transition: transform 220ms var(--ease);
}

.page-about .ab-rule [aria-expanded="true"] .disclosure__icon {
  transform: rotate(90deg);
}

.page-about .ab-rule .disclosure__panel {
  padding: 0 0 16px;
  border-top: 1px solid var(--ab-gold-line);
  margin-top: 2px;
  color: rgba(243, 237, 226, .82);
}

.page-about .ab-rule .disclosure__panel[hidden] {
  display: none;
}

.page-about .ab-rule .disclosure__panel p {
  margin: 14px 0 0;
  font-size: var(--fs-sm);
  line-height: 1.85;
  max-width: 40em;
}

.page-about .ab-rule__btn:hover,
.page-about .ab-rule__btn:focus-visible {
  color: var(--gold-bright);
}

/* ---------- 流程 ---------- */
.page-about .ab-process {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
}

.page-about .ab-flow {
  display: grid;
  gap: 26px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-flow__step {
  position: relative;
  border: 2px solid var(--slate);
  background: var(--panel);
  padding: 18px 18px 16px;
  box-shadow: var(--shadow-soft);
}

.page-about .ab-flow__step::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -15px;
  transform: translateX(-50%);
  border-top: 8px solid var(--gold);
  border-left: 7px solid transparent;
  border-right: 7px solid transparent;
}

.page-about .ab-flow__step:last-child::after {
  display: none;
}

.page-about .ab-flow__no {
  display: block;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--gold);
  margin-bottom: 8px;
}

.page-about .ab-flow__step h3 {
  margin: 0 0 8px;
  font-family: var(--font-serif);
  font-size: var(--fs-md);
  color: var(--cream);
}

.page-about .ab-flow__step p {
  margin: 0 0 10px;
  font-size: var(--fs-sm);
  line-height: 1.75;
  color: rgba(243, 237, 226, .8);
}

.page-about .ab-flow__who {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .05em;
  color: var(--teal-light) !important;
  margin-bottom: 0 !important;
}

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

.page-about .ab-process__figure .ab-frame {
  aspect-ratio: 10 / 7;
}

/* ---------- 团队 ---------- */
.page-about .ab-crew {
  display: grid;
  gap: 18px;
}

.page-about .ab-crew__item {
  background: var(--slate);
  border: 2px solid rgba(201, 162, 39, .3);
  border-left: 3px solid var(--gold);
  padding: 20px 18px;
  box-shadow: var(--shadow-soft);
}

.page-about .ab-crew__no {
  display: block;
  margin: 0 0 10px;
  font-size: var(--fs-md);
  letter-spacing: .08em;
  color: var(--gold-bright);
}

.page-about .ab-crew__item h3 {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-size: var(--fs-md);
  color: var(--cream);
}

.page-about .ab-crew__item p:last-child {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.8;
  color: rgba(243, 237, 226, .8);
}

/* ---------- 时间轴 ---------- */
.page-about .ab-tl-layout {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
}

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

.page-about .ab-tl::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 4px;
  bottom: 4px;
  border-left: 1px dashed rgba(110, 31, 46, .9);
}

.page-about .ab-tl__item {
  position: relative;
  padding: 4px 0 0;
}

.page-about .ab-tl__dot {
  position: absolute;
  left: -26px;
  top: 8px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--wine);
  border: 2px solid var(--gold);
  box-shadow: 0 0 0 3px rgba(11, 11, 13, .9);
}

.page-about .ab-tl__year {
  display: block;
  font-size: var(--fs-md);
  letter-spacing: .1em;
  color: var(--gold-bright);
  margin-bottom: 6px;
}

.page-about .ab-tl__item h3 {
  margin: 0 0 8px;
  font-family: var(--font-serif);
  font-size: var(--fs-base);
  line-height: 1.5;
  color: var(--cream);
}

.page-about .ab-tl__item p {
  margin: 0;
  max-width: 26em;
  font-size: var(--fs-sm);
  line-height: 1.8;
  color: rgba(243, 237, 226, .74);
  transition: color 200ms var(--ease);
}

.page-about .ab-tl__item:hover .ab-tl__dot,
.page-about .ab-tl__item:focus-within .ab-tl__dot {
  background: var(--gold-bright);
  border-color: var(--wine);
}

.page-about .ab-tl__item:hover p,
.page-about .ab-tl__item:focus-within p {
  color: var(--cream);
}

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

.page-about .ab-tl__figure .ab-frame {
  aspect-ratio: 11 / 7;
}

/* ---------- 共建 ---------- */
.page-about .ab-partners {
  padding: clamp(24px, 5vw, 44px) clamp(20px, 4vw, 40px);
  border: 2px solid var(--teal);
  border-left: 4px solid var(--teal-light);
  box-shadow: var(--shadow-hard);
}

.page-about .ab-partners__eyebrow {
  display: block;
  margin-bottom: 12px;
}

.page-about .ab-partners h2 {
  margin: 0 0 16px;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.35rem, 4vw, var(--fs-lg));
  line-height: 1.35;
  color: var(--cream);
}

.page-about .ab-partners > p {
  max-width: 38em;
  margin: 0 0 22px;
  font-size: var(--fs-base);
  line-height: 1.85;
  color: rgba(243, 237, 226, .86);
}

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

.page-about .ab-partners__cell {
  border-top: 2px solid var(--teal-light);
  padding-top: 12px;
}

.page-about .ab-partners__cell h3 {
  margin: 0 0 8px;
  font-family: var(--font-serif);
  font-size: var(--fs-base);
  color: var(--teal-light);
}

.page-about .ab-partners__cell p {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.8;
  color: rgba(243, 237, 226, .78);
}

.page-about .ab-partners__tail {
  margin: 0 !important;
  font-size: var(--fs-sm) !important;
  color: rgba(243, 237, 226, .78) !important;
}

/* ---------- 结语 ---------- */
.page-about .ab-close {
  border-top: 1px solid var(--ab-gold-line);
  padding-bottom: clamp(20px, 4vw, 40px);
}

.page-about .ab-close .anno {
  display: block;
  margin-bottom: 12px;
}

.page-about .ab-close h2 {
  margin: 0 0 16px;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.3rem, 3.8vw, var(--fs-lg));
  line-height: 1.4;
  color: var(--cream);
}

.page-about .ab-close p {
  margin: 0 0 1.2em;
  font-size: var(--fs-base);
  line-height: 1.85;
  color: rgba(243, 237, 226, .82);
}

.page-about .ab-close__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.page-about .ab-close__actions .btn {
  border-bottom: 0;
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 720px) {
  .page-about .ab-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px 24px;
  }

  .page-about .ab-flow__step::after {
    display: none;
  }

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

  .page-about .ab-crew__item:nth-child(2) {
    margin-top: 28px;
  }
}

@media (min-width: 900px) {
  .page-about .ab-hero__inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 380px);
  }

  .page-about .ab-hero__figure {
    justify-self: end;
    width: 100%;
  }

  .page-about .ab-process {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, .75fr);
    align-items: start;
  }

  .page-about .ab-tl-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 340px);
    align-items: start;
  }

  .page-about .ab-tl__figure {
    position: sticky;
    top: 96px;
  }
}

@media (min-width: 1000px) {
  .page-about .ab-body {
    grid-template-columns: var(--ab-index-w) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .ab-index {
    position: sticky;
    top: 92px;
    border-top: 0;
    border-bottom: 0;
    border-left: 1px solid var(--ab-gold-line);
    padding: 4px 0 4px 0;
    align-self: start;
  }

  .page-about .ab-index__cap {
    display: block;
    margin: 0 0 14px;
    padding-left: 14px;
    color: var(--smoke);
  }

  .page-about .ab-index__list {
    display: block;
    padding: 0;
    overflow: visible;
  }

  .page-about .ab-index__list li {
    margin-bottom: 2px;
  }

  .page-about .ab-index__link {
    display: grid;
    grid-template-columns: 26px 1fr;
    align-items: center;
    width: 100%;
    padding: 9px 12px 9px 14px;
    border: 0;
    border-left: 2px solid transparent;
    font-size: var(--fs-sm);
    color: rgba(243, 237, 226, .7);
  }

  .page-about .ab-index__link:hover,
  .page-about .ab-index__link:focus-visible {
    border-left-color: var(--gold-bright);
    background: transparent;
    color: var(--cream);
  }

  .page-about .ab-block {
    padding-left: clamp(0px, 2.4vw, 34px);
  }

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

  .page-about .ab-block--offset {
    margin-left: 0;
    padding-left: clamp(0px, 2.4vw, 34px);
  }

  .page-about .ab-flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .ab-flow__step {
    padding: 16px 14px 14px;
  }

  .page-about .ab-flow__step::after {
    display: block;
    left: auto;
    right: -13px;
    bottom: auto;
    top: 28px;
    transform: none;
    border-top: 6px solid transparent;
    border-bottom: 6px solid transparent;
    border-left: 8px solid var(--gold);
    border-right: 0;
  }

  .page-about .ab-flow__step:last-child::after {
    display: none;
  }

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

  .page-about .ab-crew__item:nth-child(2) {
    margin-top: 34px;
  }

  .page-about .ab-crew__item:nth-child(3) {
    margin-top: 12px;
  }

  .page-about .ab-tl {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
    padding: 26px 0 0;
  }

  .page-about .ab-tl::before {
    left: 0;
    right: 0;
    top: 6px;
    bottom: auto;
    border-left: 0;
    border-top: 1px dashed rgba(110, 31, 46, .9);
  }

  .page-about .ab-tl__item {
    padding: 0 10px 0 0;
  }

  .page-about .ab-tl__dot {
    left: 0;
    top: -26px;
  }

  .page-about .ab-tl__year {
    font-size: var(--fs-lg);
  }
}

@media (min-width: 1200px) {
  .page-about .ab-block--offset {
    padding-left: clamp(20px, 3vw, 56px);
  }

  .page-about .ab-stance p {
    max-width: 34em;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-rule .disclosure__icon,
  .page-about .ab-tl__item p {
    transition: none;
  }
}
<<<END>>>