/* ===== 品牌档案页 · 页面作用域 ===== */
.page-about {
  --ab-ink-soft: #5a5163;
  --ab-rail: 132px;
  background: var(--c-night);
  color: var(--c-paper);
  font-family: var(--font-body);
}

/* ---------- 面包屑带 ---------- */
.page-about .ab-crumb-band {
  background: var(--c-night);
  padding: clamp(14px, 2.4vw, 22px) 0 0;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(115% 85% at 84% 4%, rgba(58, 28, 78, .92) 0%, rgba(27, 15, 38, 0) 62%),
    radial-gradient(85% 65% at 2% 100%, rgba(110, 27, 51, .42) 0%, rgba(27, 15, 38, 0) 58%),
    var(--c-night);
  padding: clamp(26px, 5vw, 52px) 0 clamp(46px, 8vw, 92px);
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(112deg, rgba(201, 162, 74, .06) 0 1px, rgba(201, 162, 74, 0) 1px 24px),
    repeating-linear-gradient(24deg, rgba(183, 177, 192, .035) 0 1px, rgba(183, 177, 192, 0) 1px 38px);
}

.page-about .ab-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(30px, 5vw, 52px);
}

.page-about .ab-hero .eyebrow {
  color: var(--c-gold);
  margin: 0;
}

.page-about .ab-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 6.2vw, 3.4rem);
  line-height: 1.16;
  letter-spacing: -.02em;
  margin: 1rem 0 0;
  color: var(--c-paper);
}

.page-about .ab-hero__dek {
  margin: 1.3rem 0 0;
  max-width: 36em;
  font-size: var(--fs-17);
  line-height: 1.9;
  color: var(--c-mist);
}

.page-about .ab-hero__actions {
  margin-top: clamp(24px, 4vw, 36px);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .ab-hero__panel {
  border: 1px solid var(--line-gold);
  background: linear-gradient(158deg, rgba(58, 28, 78, .66), rgba(27, 15, 38, .42));
  box-shadow: var(--shadow-card);
  padding: clamp(20px, 3.4vw, 30px);
}

.page-about .ab-hero__panel-tag {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .3em;
  color: var(--c-gold);
}

.page-about .ab-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-gold-soft);
  border: 1px solid var(--line-gold-soft);
}

.page-about .ab-facts li {
  background: rgba(27, 15, 38, .78);
  padding: 16px 14px 18px;
}

.page-about .ab-facts b {
  display: block;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: var(--fs-30);
  line-height: 1.05;
  color: var(--c-gold-soft);
}

.page-about .ab-facts span {
  display: block;
  margin-top: 8px;
  font-size: var(--fs-12);
  line-height: 1.6;
  color: var(--c-mist);
}

.page-about .ab-hero__panel-note {
  margin: 16px 0 0;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--c-mist);
}

/* ---------- 章节标题组件 ---------- */
.page-about .ab-sec-head {
  display: grid;
  gap: 10px;
}

.page-about .ab-sec-note {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .22em;
  color: var(--c-gold);
  writing-mode: horizontal-tb;
}

.page-about .ab-sec-head h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.65rem, 4.4vw, 2.5rem);
  line-height: 1.24;
  letter-spacing: -.02em;
  margin: 0;
  color: var(--c-paper);
}

.page-about .ab-sec-dek {
  margin: .8rem 0 0;
  max-width: 42em;
  font-size: var(--fs-17);
  line-height: 1.85;
  color: var(--c-mist);
}

.page-about .ab-sec-head--ink h2 { color: var(--c-ink); }
.page-about .ab-sec-head--ink .ab-sec-dek { color: var(--ab-ink-soft); }
.page-about .ab-sec-head--ink .ab-sec-note { color: var(--c-wine); }

@media (min-width: 760px) {
  .page-about .ab-sec-head {
    grid-template-columns: 26px minmax(0, 1fr);
    gap: clamp(18px, 3vw, 32px);
    align-items: start;
  }
  .page-about .ab-sec-note {
    writing-mode: vertical-rl;
    padding-top: 6px;
  }
}

/* ---------- 通用区块间距与媒体 ---------- */
.page-about .ab-tl,
.page-about .ab-lines,
.page-about .ab-team,
.page-about .ab-flow,
.page-about .ab-region,
.page-about .ab-partners {
  padding: clamp(48px, 8vw, 96px) 0;
}

.page-about .media {
  margin: 0;
}

.page-about .media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--line-gold-soft);
}

.page-about .media__caption {
  margin-top: .7rem;
  font-size: var(--fs-12);
  line-height: 1.6;
  letter-spacing: .04em;
  color: var(--c-mist);
}

.page-about .ab-team .media__caption,
.page-about .ab-partners .media__caption {
  color: var(--ab-ink-soft);
}

/* ---------- 时间线 ---------- */
.page-about .ab-tl {
  background: var(--c-night);
}

.page-about .ab-timeline {
  list-style: none;
  margin: clamp(34px, 6vw, 60px) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(34px, 5vw, 56px);
}

.page-about .ab-node {
  position: relative;
  padding-left: 28px;
  display: grid;
  gap: 10px;
}

.page-about .ab-node::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 14px;
  bottom: calc(clamp(34px, 5vw, 56px) * -1);
  width: 1px;
  background: linear-gradient(180deg, var(--line-gold), rgba(201, 162, 74, .1));
}

.page-about .ab-node:last-child::before { bottom: 0; }

.page-about .ab-node::after {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--c-night);
  border: 1px solid var(--c-gold);
  box-shadow: 0 0 0 4px rgba(201, 162, 74, .1);
  transition: background 320ms var(--ease), transform 320ms var(--ease);
}

.page-about .ab-node:hover::after {
  background: var(--c-gold);
  transform: scale(1.18);
}

.page-about .ab-node__year {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  letter-spacing: .14em;
  color: var(--c-gold);
}

.page-about .ab-node__body h3 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.15rem, 2.6vw, 1.5rem);
  line-height: 1.38;
  letter-spacing: -.01em;
  margin: .5rem 0 0;
  color: var(--c-paper);
}

.page-about .ab-node__body p {
  margin: .85rem 0 0;
  font-size: var(--fs-17);
  line-height: 1.85;
  color: var(--c-mist);
}

.page-about .ab-node__body .ab-node__aside {
  padding-left: 14px;
  border-left: 1px solid var(--line-gold-soft);
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--c-mist);
}

.page-about .ab-node__body .media {
  margin-top: clamp(18px, 3vw, 26px);
}

@media (min-width: 860px) {
  .page-about .ab-node {
    grid-template-columns: var(--ab-rail) minmax(0, 1fr);
    gap: clamp(24px, 4vw, 56px);
    padding-left: 36px;
  }
  .page-about .ab-node::before { left: 6px; }
  .page-about .ab-node::after { left: 1px; }
  .page-about .ab-node__body { max-width: 62%; }
  .page-about .ab-node:nth-child(even) .ab-node__body {
    max-width: 52%;
    margin-left: auto;
  }
}

/* ---------- 三条内容线 ---------- */
.page-about .ab-lines {
  background: var(--c-cellar);
  border-top: 1px solid var(--line-gold-soft);
  border-bottom: 1px solid var(--line-gold-soft);
}

.page-about .ab-lines__grid {
  margin-top: clamp(30px, 5vw, 52px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
}

.page-about .ab-line {
  background: var(--c-cellar);
  padding: clamp(22px, 3vw, 32px);
  transition: background 320ms var(--ease);
}

.page-about .ab-line:hover { background: rgba(110, 27, 51, .26); }

.page-about .ab-line__tag {
  margin: 0 0 16px;
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .18em;
  color: var(--c-gold-soft);
  border: 1px solid var(--line-gold);
  padding: 3px 10px;
}

.page-about .ab-line h3 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.2rem, 2.4vw, 1.45rem);
  margin: 0;
  color: var(--c-paper);
}

.page-about .ab-line p {
  margin: .8rem 0 0;
  font-size: var(--fs-17);
  line-height: 1.85;
  color: var(--c-mist);
}

@media (min-width: 780px) {
  .page-about .ab-lines__grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

/* ---------- 团队分工 ---------- */
.page-about .ab-team {
  background: var(--c-paper);
  color: var(--c-ink);
}

.page-about .ab-team__grid {
  margin-top: clamp(30px, 5vw, 52px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--c-lilac);
  border: 1px solid var(--c-lilac);
}

.page-about .ab-team__cell {
  background: var(--c-paper);
  padding: clamp(22px, 3vw, 30px);
  transition: background 320ms var(--ease);
}

.page-about .ab-team__cell:hover { background: #ffffff; }

.page-about .ab-team__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-44);
  line-height: 1;
  color: var(--c-wine);
}

.page-about .ab-team__cell h3 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: var(--fs-22);
  line-height: 1.35;
  color: var(--c-ink);
}

.page-about .ab-team__cell p {
  margin: .7rem 0 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--ab-ink-soft);
}

.page-about .ab-team__sum {
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--c-wine);
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--ab-ink-soft);
}

@media (min-width: 600px) {
  .page-about .ab-team__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 1000px) {
  .page-about .ab-team__grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

/* ---------- 条目上线流程 ---------- */
.page-about .ab-flow {
  background: var(--c-paper);
  color: var(--c-ink);
  border-top: 1px solid var(--c-lilac);
}

.page-about .ab-flow__grid {
  display: grid;
  gap: clamp(28px, 5vw, 56px);
}

.page-about .ab-flow__rail .media {
  margin-top: clamp(24px, 4vw, 36px);
}

.page-about .ab-flow__rail .media img,
.page-about .ab-flow__rail .media__caption { }

.page-about .ab-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--c-lilac);
}

.page-about .ab-steps li {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 6px 14px;
  padding: clamp(20px, 3vw, 28px) 0;
  border-bottom: 1px solid var(--c-lilac);
}

.page-about .ab-steps__no {
  grid-column: 1;
  grid-row: 1 / span 2;
  font-family: var(--font-mono);
  font-size: var(--fs-22);
  line-height: 1.25;
  color: var(--c-gold);
}

.page-about .ab-steps h3 {
  grid-column: 2;
  grid-row: 1;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: var(--fs-22);
  line-height: 1.35;
  color: var(--c-ink);
}

.page-about .ab-steps p {
  grid-column: 2;
  grid-row: 2;
  margin: 0;
  font-size: var(--fs-17);
  line-height: 1.85;
  color: var(--ab-ink-soft);
}

@media (min-width: 900px) {
  .page-about .ab-flow__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    align-items: start;
    gap: clamp(36px, 5vw, 72px);
  }
  .page-about .ab-steps li { grid-template-columns: 56px minmax(0, 1fr); }
}

/* ---------- 服务范围 ---------- */
.page-about .ab-region {
  background:
    radial-gradient(100% 80% at 84% 6%, rgba(16, 64, 60, .95) 0%, rgba(16, 64, 60, 0) 66%),
    var(--c-night);
  border-top: 1px solid var(--line-gold-soft);
  border-bottom: 1px solid var(--line-gold-soft);
  color: var(--c-paper);
}

.page-about .ab-region__grid {
  display: grid;
  gap: clamp(30px, 5vw, 56px);
}

.page-about .ab-info {
  margin: clamp(26px, 4vw, 36px) 0 0;
}

.page-about .ab-info__row {
  display: grid;
  gap: 5px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-dark);
}

.page-about .ab-info dt {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .14em;
  color: var(--c-gold);
}

.page-about .ab-info dd {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-size: var(--fs-17);
  line-height: 1.7;
  color: var(--c-paper);
}

.page-about .ab-info__mail {
  word-break: break-all;
}

.page-about .ab-copy {
  border: 1px solid var(--line-gold);
  background: transparent;
  color: var(--c-gold-soft);
  font-family: var(--font-body);
  font-size: var(--fs-12);
  letter-spacing: .08em;
  padding: 4px 12px;
  cursor: pointer;
  transition: background 240ms var(--ease), color 240ms var(--ease), border-color 240ms var(--ease);
}

.page-about .ab-copy:hover {
  background: var(--c-gold);
  border-color: var(--c-gold);
  color: var(--c-night);
}

.page-about .ab-region__note {
  margin: clamp(20px, 3vw, 28px) 0 0;
  max-width: 40em;
  font-size: var(--fs-14);
  line-height: 1.85;
  color: var(--c-mist);
}

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

.page-about .ab-region__fig img { aspect-ratio: 14 / 9; }

@media (min-width: 560px) {
  .page-about .ab-info__row {
    grid-template-columns: 118px minmax(0, 1fr);
    gap: 18px;
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-about .ab-region__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    align-items: center;
    gap: clamp(40px, 6vw, 80px);
  }
}

/* ---------- 伙伴与荣誉 ---------- */
.page-about .ab-partners {
  background: var(--c-paper);
  color: var(--c-ink);
  border-top: 1px solid var(--c-lilac);
}

.page-about .ab-partners__grid {
  margin-top: clamp(30px, 5vw, 52px);
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-about .ab-partners__text p {
  margin: 0 0 1rem;
  max-width: 34em;
  font-size: var(--fs-17);
  line-height: 1.9;
  color: var(--ab-ink-soft);
}

.page-about .ab-acc__item {
  border-bottom: 1px solid var(--c-lilac);
}

.page-about .ab-acc__item:first-child {
  border-top: 1px solid var(--c-lilac);
}

.page-about .ab-acc__item summary {
  list-style: none;
  position: relative;
  cursor: pointer;
  padding: 18px 38px 18px 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: var(--fs-17);
  line-height: 1.6;
  color: var(--c-ink);
  transition: color 240ms var(--ease);
}

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

.page-about .ab-acc__item summary::after {
  content: "+";
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: var(--fs-22);
  line-height: 1;
  color: var(--c-gold);
  transition: transform 260ms var(--ease);
}

.page-about .ab-acc__item[open] summary::after {
  transform: translateY(-50%) rotate(45deg);
}

.page-about .ab-acc__item summary:hover,
.page-about .ab-acc__item summary:focus-visible {
  color: var(--c-wine);
}

.page-about .ab-acc__item p {
  margin: 0 0 20px;
  padding-right: clamp(0px, 4vw, 40px);
  font-size: var(--fs-14);
  line-height: 1.85;
  color: var(--ab-ink-soft);
}

@media (min-width: 900px) {
  .page-about .ab-partners__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: clamp(40px, 6vw, 76px);
  }
}

/* ---------- 收束条 ---------- */
.page-about .ab-cta {
  background:
    linear-gradient(120deg, rgba(110, 27, 51, .96) 0%, rgba(58, 28, 78, .96) 100%),
    var(--c-wine);
  padding: clamp(40px, 6vw, 68px) 0;
}

.page-about .ab-cta__inner {
  display: grid;
  gap: 22px;
}

.page-about .ab-cta__line {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.25rem, 3vw, 1.7rem);
  line-height: 1.5;
  letter-spacing: -.01em;
  color: var(--c-paper);
}

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

.page-about .ab-cta .btn--gold {
  background: var(--c-gold);
  border-color: var(--c-gold);
  color: var(--c-night);
}

.page-about .ab-cta .btn--gold:hover {
  background: var(--c-gold-soft);
  border-color: var(--c-gold-soft);
}

@media (min-width: 820px) {
  .page-about .ab-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 40px;
  }
}

/* ---------- 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }
}
<<<END>>>