.page-about {
  --ab-spine-w: 124px;
  --ab-margin-w: 264px;
  --ab-gap: clamp(20px, 2.6vw, 36px);
  overflow-x: clip;
}

/* ============ 首屏 ============ */
.page-about .ab-hero {
  position: relative;
  background: var(--dk-coal);
  color: var(--dk-cream);
  padding: clamp(18px, 3vw, 32px) 0 clamp(60px, 8vw, 104px);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 36px), 0 100%);
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 107, 26, 0.3) 1px, transparent 1px);
  background-size: 15px 15px;
  opacity: 0.55;
  pointer-events: none;
}

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

.page-about .ab-hero .dk-breadcrumb,
.page-about .ab-hero .dk-breadcrumb li,
.page-about .ab-hero .dk-breadcrumb a {
  color: rgba(255, 247, 238, 0.82);
}

.page-about .ab-hero .dk-breadcrumb a {
  text-decoration: none;
  border-bottom: 2px solid var(--dk-orange);
}

.page-about .ab-hero .dk-breadcrumb a:hover {
  color: var(--dk-yellow);
}

.page-about .ab-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 40px);
  margin-top: clamp(20px, 3.4vw, 34px);
}

.page-about .ab-hero__title {
  color: var(--dk-cream);
  margin: 10px 0 0;
  text-shadow: 7px 7px 0 rgba(122, 43, 255, 0.55);
}

.page-about .ab-hero__lede {
  color: rgba(255, 247, 238, 0.88);
  margin-top: 18px;
  max-width: 34em;
}

.page-about .ab-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: clamp(20px, 3vw, 28px);
  padding-top: 18px;
  border-top: 2px solid rgba(255, 247, 238, 0.24);
}

.page-about .ab-hero__stats div {
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 0;
}

.page-about .ab-hero__stats b {
  font-family: var(--dk-font-display);
  font-weight: 900;
  font-style: italic;
  font-size: clamp(20px, 3.4vw, 30px);
  line-height: 1;
  color: var(--dk-cyan);
}

.page-about .ab-hero__stats span {
  font-size: 12px;
  line-height: 1.45;
  letter-spacing: 0.02em;
  color: rgba(255, 247, 238, 0.72);
}

.page-about .ab-hero__media {
  margin: 0;
  transform: rotate(-1.4deg);
  border: 3px solid var(--dk-graphite);
  box-shadow: 8px 8px 0 rgba(255, 107, 26, 0.85);
}

.page-about .ab-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ============ 主体三栏 ============ */
.page-about .ab-stage {
  background: var(--dk-cream);
  padding-bottom: clamp(40px, 7vw, 88px);
}

.page-about .ab-sheet {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.6vw, 34px);
  padding-top: clamp(30px, 5vw, 62px);
}

/* 年份轴 */
.page-about .ab-spine {
  min-width: 0;
}

.page-about .ab-spine__head {
  font-family: var(--dk-font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--dk-graphite);
  margin: 0 0 10px;
  padding-left: 10px;
}

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

.page-about .ab-spine__list li {
  flex: 0 0 auto;
}

.page-about .ab-spine__link {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 8px 12px;
  border: 2px solid var(--dk-graphite);
  border-radius: 999px;
  background: var(--dk-sand);
  color: var(--dk-graphite);
  text-decoration: none;
  transition: background 0.18s ease, color 0.18s ease, transform 0.18s ease;
}

.page-about .ab-spine__k {
  font-family: var(--dk-font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.page-about .ab-spine__v {
  font-size: 11px;
  letter-spacing: 0.06em;
  opacity: 0.78;
}

.page-about .ab-spine__link:hover,
.page-about .ab-spine__link:focus-visible {
  background: var(--dk-orange);
  color: var(--dk-coal);
  transform: translateY(-2px);
}

/* 中间叙事栏 */
.page-about .ab-stream {
  min-width: 0;
}

.page-about .ab-chapter {
  margin-bottom: clamp(36px, 6vw, 68px);
}

.page-about .ab-h2 {
  font-family: var(--dk-font-display);
  font-weight: 900;
  font-size: clamp(25px, 4.4vw, 38px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--dk-graphite);
  margin: 0 0 18px;
}

.page-about .ab-h2::before {
  content: "";
  display: block;
  width: 46px;
  height: 3px;
  background: var(--dk-orange);
  margin-bottom: 14px;
}

.page-about .ab-prose p {
  font-size: 16px;
  line-height: 1.85;
  color: var(--dk-graphite);
  margin: 0 0 1.05em;
  max-width: 40em;
}

.page-about .ab-prose p:last-child {
  margin-bottom: 0;
}

/* ============ 选品流程（酒红） ============ */
.page-about .ab-picker {
  background: var(--dk-wine);
  color: var(--dk-cream);
  border: var(--dk-line) solid var(--dk-graphite);
  border-radius: var(--dk-radius);
  box-shadow: var(--dk-shadow);
  padding: clamp(20px, 3.6vw, 34px);
  margin-bottom: clamp(36px, 6vw, 68px);
}

.page-about .ab-picker .ab-h2 {
  color: var(--dk-cream);
  margin-top: 10px;
}

.page-about .ab-picker .ab-h2::before {
  background: var(--dk-yellow);
}

.page-about .ab-picker__lede {
  font-size: 15px;
  line-height: 1.8;
  color: rgba(255, 247, 238, 0.88);
  margin: 0 0 18px;
  max-width: 38em;
}

.page-about .ab-steps {
  border-top: 2px solid rgba(255, 247, 238, 0.22);
}

.page-about .ab-step {
  border-bottom: 2px solid rgba(255, 247, 238, 0.22);
  padding: 6px 0;
}

.page-about .ab-step > summary {
  display: flex;
  align-items: center;
  gap: 12px;
  list-style: none;
  cursor: pointer;
  padding: 10px 0;
  font-family: var(--dk-font-display);
  font-weight: 800;
  font-size: clamp(16px, 2.6vw, 19px);
  color: var(--dk-cream);
}

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

.page-about .ab-step > summary::after {
  content: "＋";
  margin-left: auto;
  font-family: var(--dk-font-mono);
  font-size: 16px;
  color: var(--dk-yellow);
  transition: transform 0.2s ease;
}

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

.page-about .ab-step > summary:hover {
  color: var(--dk-yellow);
}

.page-about .ab-step__no {
  flex: 0 0 auto;
  font-family: var(--dk-font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  background: var(--dk-yellow);
  color: var(--dk-coal);
  border-radius: 999px;
  padding: 4px 10px;
}

.page-about .ab-step__body {
  padding: 2px 0 12px;
}

.page-about .ab-step__body ul {
  margin: 0;
  padding-left: 20px;
  color: rgba(255, 247, 238, 0.9);
}

.page-about .ab-step__body li {
  font-size: 15px;
  line-height: 1.75;
  margin-bottom: 7px;
}

.page-about .ab-step__body li:last-child {
  margin-bottom: 0;
}

/* ============ 三城 ============ */
.page-about .ab-cities {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3.4vw, 30px);
  align-items: start;
}

.page-about .ab-cities__fig {
  margin: 0;
  transform: rotate(1.6deg);
  border: 3px solid var(--dk-graphite);
  box-shadow: var(--dk-shadow-sm);
}

.page-about .ab-cities__fig img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .ab-roster {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.page-about .ab-roster li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  background: var(--dk-sand);
  border: 2px solid var(--dk-graphite);
  border-radius: 12px;
  padding: 9px 12px;
}

.page-about .ab-roster span {
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--dk-graphite);
}

.page-about .ab-roster strong {
  font-family: var(--dk-font-mono);
  font-size: 17px;
  font-weight: 700;
  color: var(--dk-graphite);
}

/* ============ 时间线 ============ */
.page-about .ab-timeline__lede {
  font-size: 15px;
  line-height: 1.8;
  color: var(--dk-graphite);
  margin: 0 0 22px;
  max-width: 38em;
}

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

.page-about .ab-tl::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 10px;
  width: 3px;
  border-radius: 3px;
  background: var(--dk-sand);
}

.page-about .ab-tl__item {
  position: relative;
  padding-bottom: clamp(20px, 3.2vw, 30px);
  scroll-margin-top: 90px;
}

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

.page-about .ab-tl__item::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 8px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--dk-cream);
  border: 3px solid var(--dk-graphite);
  transition: background 0.22s ease, border-color 0.22s ease, transform 0.22s ease;
}

.page-about .ab-tl__item.is-visible::before {
  background: var(--dk-orange);
  border-color: var(--dk-orange);
  transform: scale(1.12);
}

.page-about .ab-tl__year {
  display: inline-block;
  font-family: var(--dk-font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  background: var(--dk-coal);
  color: var(--dk-cream);
  border-radius: 999px;
  padding: 3px 11px;
  margin-bottom: 8px;
}

.page-about .ab-tl__title {
  font-family: var(--dk-font-display);
  font-weight: 900;
  font-size: clamp(17px, 2.6vw, 21px);
  line-height: 1.3;
  color: var(--dk-graphite);
  margin: 0 0 6px;
}

.page-about .ab-tl__item p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--dk-graphite);
  margin: 0;
  max-width: 34em;
}

/* ============ 合作生态 ============ */
.page-about .ab-partners {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 26px);
  align-items: center;
  background: var(--dk-teal);
  color: var(--dk-cream);
  border: var(--dk-line) solid var(--dk-graphite);
  border-radius: var(--dk-radius);
  box-shadow: var(--dk-shadow);
  padding: clamp(20px, 3.4vw, 32px);
  margin-bottom: clamp(36px, 6vw, 64px);
}

.page-about .ab-partners .ab-h2 {
  color: var(--dk-cream);
}

.page-about .ab-partners .ab-h2::before {
  background: var(--dk-cyan);
}

.page-about .ab-partners .ab-prose p {
  color: rgba(255, 247, 238, 0.9);
}

.page-about .ab-partners .dk-link {
  color: var(--dk-yellow);
}

.page-about .ab-partners__fig {
  margin: 0;
  border: 3px solid var(--dk-graphite);
  box-shadow: 6px 6px 0 rgba(0, 229, 208, 0.55);
}

.page-about .ab-partners__fig img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ============ 规矩 ============ */
.page-about .ab-rules {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .ab-rules li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  background: var(--dk-cream);
  border: var(--dk-line) solid var(--dk-graphite);
  border-radius: 14px;
  box-shadow: var(--dk-shadow-sm);
  padding: 15px 18px;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.page-about .ab-rules li:hover {
  transform: translate(-3px, -3px);
  box-shadow: 7px 7px 0 var(--dk-graphite);
}

.page-about .ab-rules b {
  font-family: var(--dk-font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--dk-wine);
  line-height: 1.2;
}

.page-about .ab-rules h3 {
  font-family: var(--dk-font-display);
  font-weight: 900;
  font-size: 17px;
  color: var(--dk-graphite);
  margin: 0 0 4px;
}

.page-about .ab-rules p {
  font-size: 14px;
  line-height: 1.72;
  color: var(--dk-graphite);
  margin: 0;
}

/* ============ 右侧旁注 ============ */
.page-about .ab-margin {
  display: grid;
  gap: 16px;
  min-width: 0;
}

.page-about .ab-margin__head {
  font-family: var(--dk-font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--dk-graphite);
  margin: 0;
}

.page-about .ab-mcard {
  background: var(--dk-sand);
  border: var(--dk-line) solid var(--dk-graphite);
  border-left: 6px solid var(--dk-cyan);
  border-radius: 14px;
  box-shadow: var(--dk-shadow-sm);
  padding: 14px 16px 16px;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.page-about .ab-mcard:nth-child(odd) {
  transform: rotate(-0.8deg);
}

.page-about .ab-mcard:nth-child(even) {
  transform: rotate(0.7deg);
}

.page-about .ab-mcard:hover {
  transform: rotate(0deg) translateY(-3px);
  box-shadow: 7px 7px 0 var(--dk-graphite);
}

.page-about .ab-mcard__k {
  display: inline-block;
  font-family: var(--dk-font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  background: var(--dk-graphite);
  color: var(--dk-cream);
  border-radius: 999px;
  padding: 2px 9px;
}

.page-about .ab-mcard__big {
  font-family: var(--dk-font-display);
  font-weight: 900;
  font-size: 26px;
  line-height: 1.1;
  color: var(--dk-graphite);
  margin: 8px 0 5px;
}

.page-about .ab-mcard__note {
  font-size: 13px;
  line-height: 1.7;
  color: var(--dk-graphite);
  margin: 0;
}

/* ============ 收尾 ============ */
.page-about .ab-next {
  margin-top: clamp(34px, 5vw, 60px);
  background: var(--dk-violet);
  color: var(--dk-cream);
  border: var(--dk-line) solid var(--dk-graphite);
  border-radius: var(--dk-radius);
  box-shadow: var(--dk-shadow);
  padding: clamp(22px, 3.6vw, 36px);
}

.page-about .ab-next__title {
  font-family: var(--dk-font-display);
  font-weight: 900;
  font-size: clamp(22px, 3.6vw, 30px);
  line-height: 1.2;
  color: var(--dk-cream);
  margin: 0 0 10px;
}

.page-about .ab-next__text {
  font-size: 15px;
  line-height: 1.8;
  color: rgba(255, 247, 238, 0.9);
  margin: 0 0 18px;
  max-width: 44em;
}

.page-about .ab-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ============ 平板 ============ */
@media (min-width: 720px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: end;
  }

  .page-about .ab-cities {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.7fr);
  }

  .page-about .ab-partners {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.68fr);
  }

  .page-about .ab-prose p {
    font-size: 17px;
  }
}

/* ============ 桌面三栏 ============ */
@media (min-width: 1024px) {
  .page-about .ab-sheet {
    grid-template-columns: var(--ab-spine-w) minmax(0, 1fr) var(--ab-margin-w);
    column-gap: var(--ab-gap);
    align-items: start;
  }

  .page-about .ab-spine {
    position: sticky;
    top: 88px;
    align-self: start;
  }

  .page-about .ab-spine__head {
    padding-left: 22px;
    margin-bottom: 4px;
  }

  .page-about .ab-spine__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .ab-spine__link {
    position: relative;
    flex-direction: column;
    align-items: flex-start;
    gap: 1px;
    border: 0;
    border-radius: 0;
    border-left: 2px solid rgba(43, 38, 34, 0.26);
    background: transparent;
    padding: 9px 0 9px 22px;
    transition: border-color 0.18s ease, color 0.18s ease;
  }

  .page-about .ab-spine__link::before {
    content: "";
    position: absolute;
    left: -7px;
    top: 50%;
    width: 12px;
    height: 12px;
    margin-top: -6px;
    border-radius: 50%;
    background: var(--dk-cream);
    border: 2px solid var(--dk-graphite);
    transition: background 0.18s ease, border-color 0.18s ease;
  }

  .page-about .ab-spine__link:hover,
  .page-about .ab-spine__link:focus-visible {
    background: transparent;
    color: var(--dk-orange);
    border-left-color: var(--dk-orange);
    transform: none;
  }

  .page-about .ab-spine__link:hover::before,
  .page-about .ab-spine__link:focus-visible::before {
    background: var(--dk-orange);
    border-color: var(--dk-orange);
  }

  .page-about .ab-margin {
    margin-top: 62px;
    position: sticky;
    top: 88px;
  }
}

@media (min-width: 1200px) {
  .page-about .ab-hero__grid {
    gap: 52px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-mcard,
  .page-about .ab-spine__link,
  .page-about .ab-rules li,
  .page-about .ab-tl__item::before {
    transition: none;
  }
}
<<<END>>>