.page-about {
  --ab-gold-line: rgba(201, 162, 75, 0.42);
  --ab-gold-soft: rgba(201, 162, 75, 0.18);
  --ab-paper-line: rgba(138, 106, 70, 0.26);
  --ab-ink-text: rgba(42, 42, 40, 0.84);
  background: var(--paper);
  color: var(--charcoal);
  font-family: var(--font-body);
  line-height: 1.75;
  overflow-x: clip;
}

.page-about img {
  display: block;
  max-width: 100%;
  height: auto;
}

.page-about .breadcrumb {
  padding: calc(var(--header-h) + 12px) 0 0;
  font-size: 13px;
  letter-spacing: 0.05em;
  color: var(--brown);
}

.page-about .breadcrumb a {
  color: var(--gold-ink);
  text-decoration: none;
}

.page-about .breadcrumb a:hover {
  color: var(--vermilion);
  text-decoration: underline;
}

.page-about a:focus-visible,
.page-about summary:focus-visible {
  outline: 2px solid var(--gold-ink);
  outline-offset: 3px;
}

/* ---------- 首屏框景 ---------- */
.ab-hero {
  padding: clamp(14px, 2.2vw, 26px) 0 clamp(34px, 6vw, 70px);
}

.ab-hero-frame {
  position: relative;
  padding: clamp(22px, 4vw, 54px);
  background: linear-gradient(158deg, var(--ink-deep) 0%, var(--ink) 62%, #16333a 100%);
  color: var(--paper);
  border: 1px solid var(--ab-gold-soft);
  box-shadow: var(--shadow-panel);
}

.ab-hero-frame::before {
  content: "";
  position: absolute;
  inset: 9px;
  border: 1px solid rgba(230, 200, 126, 0.16);
  pointer-events: none;
}

.ab-hero-top {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
}

.page-about .ab-hero-frame .kicker {
  color: var(--gold-light);
  margin: 0;
}

.ab-hero-span {
  margin: 0;
  font-family: var(--font-num);
  font-size: clamp(15px, 2vw, 19px);
  letter-spacing: 0.16em;
  color: var(--gold);
}

.ab-hero-title {
  margin: 0.42em 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(27px, 5.4vw, 50px);
  line-height: 1.24;
  letter-spacing: 0.04em;
  color: var(--paper-white);
}

.ab-hero-lead {
  margin: 0.9em 0 0;
  max-width: 58ch;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.85;
  color: rgba(246, 239, 223, 0.82);
}

.ab-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .ab-hero-frame .btn--ghost {
  color: var(--gold-light);
  border-color: rgba(230, 200, 126, 0.46);
}

.page-about .ab-hero-frame .btn--ghost:hover {
  background: rgba(230, 200, 126, 0.12);
  color: var(--paper-white);
}

.ab-years {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: clamp(24px, 3.6vw, 38px);
  padding-top: clamp(16px, 2.4vw, 22px);
  border-top: 1px solid var(--ab-gold-soft);
}

.ab-year-chip {
  display: flex;
  flex-direction: column;
  gap: 1px;
  padding: 7px 13px;
  border: 1px solid var(--ab-gold-line);
  text-decoration: none;
  color: var(--gold-light);
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.ab-year-chip:hover {
  background: var(--vermilion);
  border-color: var(--vermilion);
  color: var(--paper-white);
}

.ab-year-num {
  font-family: var(--font-num);
  font-size: 18px;
  line-height: 1.2;
  letter-spacing: 0.06em;
}

.ab-year-note {
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: rgba(246, 239, 223, 0.62);
}

.ab-year-chip:hover .ab-year-note {
  color: rgba(251, 247, 238, 0.82);
}

/* ---------- 起点 ---------- */
.ab-origin {
  padding: clamp(36px, 6.5vw, 84px) 0;
  background-image: repeating-linear-gradient(
    0deg,
    rgba(138, 106, 70, 0.045) 0 1px,
    transparent 1px 5px
  );
}

.ab-origin-grid {
  display: grid;
  gap: clamp(22px, 4vw, 48px);
}

.ab-origin-fig {
  margin: 0;
}

.page-about .media-frame {
  border: 1px solid var(--ab-paper-line);
  background: var(--paper-white);
}

.ab-origin-fig .media-frame {
  padding: 6px;
}

.ab-figcap {
  margin-top: 10px;
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--brown);
  line-height: 1.7;
}

.ab-figcap--light {
  color: rgba(246, 239, 223, 0.6);
}

.ab-h2 {
  margin: 0 0 0.55em;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 3.4vw, 35px);
  line-height: 1.32;
  letter-spacing: 0.04em;
  color: var(--ink);
}

.ab-h2--light {
  color: var(--paper-white);
}

.ab-body {
  margin: 0 0 1em;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ab-ink-text);
}

.ab-lead {
  margin: 0;
  max-width: 64ch;
  font-size: clamp(14px, 1.6vw, 16.5px);
  line-height: 1.8;
  color: rgba(42, 42, 40, 0.76);
}

.ab-textlink {
  display: inline-block;
  margin-top: 8px;
  padding-bottom: 2px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--vermilion);
  text-decoration: none;
  border-bottom: 1px solid rgba(178, 58, 46, 0.4);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.ab-textlink:hover {
  color: var(--vermilion-deep);
  border-bottom-color: var(--vermilion-deep);
}

/* ---------- 年份时间轴 ---------- */
.ab-timeline-sec {
  padding: clamp(38px, 6.5vw, 84px) 0;
  background: var(--paper-white);
  border-top: 1px solid var(--ab-paper-line);
  border-bottom: 1px solid var(--ab-paper-line);
}

.ab-timeline {
  list-style: none;
  margin: clamp(24px, 3.6vw, 40px) 0 0;
  padding: 0;
  position: relative;
}

.ab-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--gold) 6%, var(--gold) 94%, transparent);
  opacity: 0.55;
}

.ab-tl-item {
  position: relative;
  padding: 0 0 clamp(24px, 3.4vw, 34px) clamp(30px, 4.4vw, 52px);
}

.ab-tl-item::before {
  content: "";
  position: absolute;
  left: 1px;
  top: 15px;
  width: 9px;
  height: 9px;
  background: var(--paper-white);
  border: 2px solid var(--gold);
  transform: rotate(45deg);
}

.ab-tl-item:last-child {
  padding-bottom: 0;
}

.ab-tl-year {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(34px, 6vw, 54px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--vermilion);
}

.ab-tl-title {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-size: 16.5px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--ink);
}

.ab-tl-text {
  margin: 4px 0 0;
  max-width: 56ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ab-ink-text);
}

/* ---------- 资料规模 ---------- */
.ab-scale {
  padding: clamp(42px, 7vw, 92px) 0;
}

.ab-stats {
  display: grid;
  gap: 12px;
  margin: clamp(22px, 3.4vw, 34px) 0;
}

.ab-stat {
  padding: 18px 20px;
  background: var(--paper-white);
  border: 1px solid var(--ab-paper-line);
  border-left: 3px solid var(--gold);
  transition: transform 0.25s var(--ease), border-left-color 0.25s var(--ease);
}

.ab-stat:hover {
  transform: translateY(-3px);
  border-left-color: var(--vermilion);
}

.ab-stat-num {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(30px, 4.6vw, 44px);
  line-height: 1;
  color: var(--vermilion);
}

.ab-stat-label {
  display: block;
  margin-top: 8px;
  font-size: 14px;
  letter-spacing: 0.05em;
  color: var(--ink);
}

.ab-stat-note {
  display: block;
  margin-top: 6px;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--brown);
}

.ab-scale-cols {
  display: grid;
  gap: clamp(20px, 3.4vw, 36px);
}

.ab-chart {
  margin: 0;
  padding: clamp(16px, 3vw, 26px);
  background: var(--ink);
  border: 1px solid var(--ab-gold-soft);
  box-shadow: var(--shadow-panel);
}

.ab-chart-cap {
  display: block;
  margin-bottom: 14px;
  padding-bottom: 10px;
  font-family: var(--font-display);
  font-size: 15px;
  letter-spacing: 0.06em;
  color: var(--gold-light);
  border-bottom: 1px solid var(--ab-gold-soft);
}

.ab-chart svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .ab-chart .ab-grid line {
  stroke: rgba(201, 162, 75, 0.16);
  stroke-width: 1;
}

.page-about .ab-chart text {
  font-family: var(--font-body);
  font-size: 12px;
  letter-spacing: 0.04em;
  fill: rgba(246, 239, 223, 0.62);
}

.page-about .ab-chart .ab-vt {
  fill: var(--gold-light);
  font-family: var(--font-num);
}

.page-about .ab-line-a {
  fill: none;
  stroke: var(--vermilion);
  stroke-width: 2.5;
  stroke-linejoin: round;
}

.page-about .ab-line-b {
  fill: none;
  stroke: var(--gold-light);
  stroke-width: 2.2;
  stroke-linejoin: round;
  stroke-dasharray: 6 4;
}

.page-about .ab-dots-a circle {
  fill: var(--vermilion);
}

.page-about .ab-dots-b circle {
  fill: var(--gold-light);
}

.ab-chart-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 14px;
  font-size: 12.5px;
  letter-spacing: 0.04em;
}

.ab-lg {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: rgba(246, 239, 223, 0.82);
}

.ab-lg::before {
  content: "";
  width: 16px;
  height: 2px;
}

.ab-lg--a::before {
  background: var(--vermilion);
}

.ab-lg--b::before {
  background: var(--gold-light);
}

.ab-proof h3 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(19px, 2.4vw, 23px);
  letter-spacing: 0.04em;
  color: var(--ink);
}

.ab-proof-list {
  list-style: none;
  counter-reset: abpf;
  margin: 0;
  padding: 0;
}

.ab-proof-list li {
  counter-increment: abpf;
  position: relative;
  padding: 0 0 14px 36px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ab-ink-text);
}

.ab-proof-list li::before {
  content: "0" counter(abpf);
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--gold-ink);
}

.ab-proof-list li strong {
  color: var(--ink);
  font-weight: 600;
}

.ab-proof-note {
  margin: 4px 0 0;
  padding: 12px 14px;
  font-size: 13px;
  line-height: 1.75;
  color: var(--brown);
  background: rgba(201, 162, 75, 0.09);
  border-left: 2px solid var(--gold);
}

.ab-wide-fig {
  margin: clamp(26px, 4vw, 44px) 0 0;
}

/* ---------- 团队与协作 ---------- */
.ab-team {
  padding: 0 0 clamp(42px, 7vw, 88px);
}

.ab-team-panel {
  padding: clamp(24px, 4vw, 52px);
  background: var(--ink);
  color: var(--paper);
  border: 1px solid var(--ab-gold-soft);
  box-shadow: var(--shadow-panel);
}

.page-about .ab-team-panel .kicker {
  color: var(--gold-light);
  margin: 0;
}

.ab-team-lead {
  margin: 0.6em 0 0;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(246, 239, 223, 0.8);
}

.ab-team-facts {
  display: grid;
  gap: 10px;
  margin: clamp(20px, 3vw, 30px) 0;
}

.ab-fact {
  padding: 14px 16px;
  border: 1px solid var(--ab-gold-soft);
  border-top: 2px solid var(--gold);
  background: rgba(230, 200, 126, 0.05);
}

.ab-fact-num {
  display: block;
  font-family: var(--font-num);
  font-size: 30px;
  line-height: 1;
  color: var(--gold-light);
}

.ab-fact-txt {
  display: block;
  margin-top: 7px;
  font-size: 12.5px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: rgba(246, 239, 223, 0.72);
}

.page-about .ab-team-details details {
  border-top: 1px solid var(--ab-gold-soft);
  padding: 13px 0;
}

.page-about .ab-team-details details:last-of-type {
  border-bottom: 1px solid var(--ab-gold-soft);
}

.page-about .ab-team-details summary {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-size: 15.5px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--gold-light);
}

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

.page-about .ab-team-details summary::after {
  content: "＋";
  flex: none;
  font-family: var(--font-body);
  font-weight: 400;
  color: var(--gold);
}

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

.page-about .ab-team-details p {
  margin: 10px 0 0;
  font-size: 13.5px;
  line-height: 1.85;
  color: rgba(246, 239, 223, 0.76);
}

.ab-team-fig {
  margin: clamp(22px, 3.4vw, 34px) 0 0;
}

.page-about .ab-team-fig .media-frame {
  border-color: var(--ab-gold-soft);
  background: transparent;
}

/* ---------- 服务地区与联络 ---------- */
.ab-local {
  padding: 0 0 clamp(42px, 7vw, 88px);
}

.ab-local-grid {
  display: grid;
  gap: clamp(22px, 3.6vw, 44px);
}

.ab-contact {
  padding: clamp(18px, 3vw, 28px);
  background: var(--paper-white);
  border: 1px solid var(--ab-paper-line);
  border-top: 3px solid var(--vermilion);
}

.ab-contact h3 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: 20px;
  letter-spacing: 0.05em;
  color: var(--ink);
}

.ab-contact-list {
  margin: 0;
}

.ab-contact-list > div {
  padding: 10px 0;
  border-bottom: 1px dashed var(--ab-paper-line);
}

.ab-contact-list > div:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.ab-contact-list dt {
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--gold-ink);
}

.ab-contact-list dd {
  margin: 4px 0 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--charcoal);
  word-break: break-word;
}

.ab-contact-note {
  margin: 14px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--brown);
}

/* ---------- 下一步 ---------- */
.ab-next {
  padding: 0 0 clamp(48px, 7vw, 90px);
}

.ab-next-grid {
  display: grid;
  gap: 12px;
  margin-top: clamp(18px, 3vw, 28px);
}

.ab-next-card {
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding: 18px 18px 20px;
  background: var(--paper-white);
  border: 1px solid var(--ab-paper-line);
  border-left: 3px solid var(--gold);
  text-decoration: none;
  color: inherit;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), border-left-color 0.25s var(--ease);
}

.ab-next-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-panel);
  border-left-color: var(--vermilion);
}

.ab-next-k {
  font-family: var(--font-display);
  font-size: 16.5px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--ink);
}

.ab-next-d {
  font-size: 13px;
  line-height: 1.7;
  color: var(--brown);
}

/* ---------- 响应式 ---------- */
@media (min-width: 600px) {
  .ab-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .ab-team-facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 700px) {
  .ab-next-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .ab-origin-grid {
    grid-template-columns: minmax(0, 32%) minmax(0, 1fr);
    align-items: start;
  }

  .ab-scale-cols {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 900px) {
  .ab-local-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }
}

@media (min-width: 1080px) {
  .ab-next-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .ab-timeline {
    padding-left: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    animation: none !important;
    transition: none !important;
  }

  .ab-stat:hover,
  .ab-next-card:hover {
    transform: none;
  }
}
<<<END>>>