.page-about {
  --ab-line: rgba(169, 214, 229, 0.18);
  --ab-line-strong: rgba(169, 214, 229, 0.32);
  --ab-paper: #f3f8fb;
  --ab-night: #0e2a3f;
  background-color: var(--ice-deep);
  background-image:
    radial-gradient(900px 420px at 8% -6%, rgba(43, 37, 96, 0.6), transparent 70%),
    radial-gradient(720px 380px at 92% 2%, rgba(217, 164, 65, 0.13), transparent 72%),
    repeating-linear-gradient(115deg, rgba(169, 214, 229, 0.05) 0 1px, transparent 1px 28px);
  color: var(--ice-white);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  padding-bottom: 64px;
}

.page-about .page-shell {
  padding-top: 10px;
}

/* 面包屑 */
.page-about .crumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--ice-blue);
}

.page-about .crumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(169, 214, 229, 0.45);
}

.page-about .crumbs a {
  color: var(--gold-bright);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

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

/* 索引标签 */
.page-about .index-label {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold-bright);
}

.page-about .index-label::before {
  content: "";
  width: 26px;
  height: 2px;
  flex: 0 0 auto;
  background: var(--brand-gold);
}

/* 首屏刊头 */
.page-about .about-mast {
  display: grid;
  gap: 28px;
  padding: 22px 0 40px;
  border-bottom: 1px solid var(--ab-line);
}

.page-about .about-mast__lede-wrap {
  min-width: 0;
}

.page-about .about-mast h1 {
  margin: 16px 0 18px;
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 8vw, 4.4rem);
  line-height: 1.06;
  letter-spacing: 0.005em;
  font-weight: 800;
  color: var(--ice-white);
  -webkit-text-stroke: 0.4px rgba(217, 164, 65, 0.45);
  text-wrap: balance;
}

.page-about .about-mast__lede {
  max-width: 56ch;
  margin: 0;
  font-size: 16px;
  color: rgba(243, 248, 251, 0.82);
}

.page-about .about-mast__marks {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--ice-blue);
}

.page-about .about-mast__marks li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding-top: 8px;
  border-top: 1px solid var(--line-gold);
}

.page-about .about-mast__marks span {
  font-family: var(--font-display);
  font-size: 1.5rem;
  letter-spacing: 0.02em;
  color: var(--gold-bright);
}

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

/* 图片框 */
.page-about .media-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--ab-line-strong);
  border-radius: var(--radius);
  background: var(--ab-night);
  box-shadow: inset 0 0 0 6px rgba(7, 26, 43, 0.55);
}

.page-about .media-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .media-frame__tag {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 2;
  padding: 4px 10px;
  background: rgba(217, 164, 65, 0.92);
  color: var(--ice-deep);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  border-radius: 1px;
}

.page-about .media-frame__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
  padding: 22px 14px 10px;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--ice-white);
  background: linear-gradient(180deg, rgba(7, 26, 43, 0), rgba(7, 26, 43, 0.92));
}

/* 主体两栏 */
.page-about .about-body {
  display: grid;
  gap: 32px;
  padding-top: 36px;
}

.page-about .about-side {
  min-width: 0;
}

.page-about .about-toc ol {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-toc a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--ice-blue);
  text-decoration: none;
  border: 1px solid var(--ab-line);
  border-left: 2px solid var(--ab-line-strong);
  transition: color 200ms var(--ease), background-color 200ms var(--ease),
    border-color 200ms var(--ease);
}

.page-about .about-toc a:hover {
  color: var(--gold-bright);
  background: rgba(14, 42, 63, 0.85);
  border-left-color: var(--brand-gold);
}

.page-about .about-toc a[aria-current="true"],
.page-about .about-toc a.is-current {
  color: var(--ice-deep);
  background: var(--gold-bright);
  border-color: var(--gold-bright);
  border-left-color: var(--track-orange);
  font-weight: 600;
}

.page-about .about-toc a:focus-visible,
.page-about .about-side__note .btn:focus-visible,
.page-about .about-cta__actions .btn:focus-visible,
.page-about .crumbs a:focus-visible {
  outline: 2px solid var(--mint);
  outline-offset: 3px;
}

.page-about .about-side__note {
  margin-top: 22px;
  padding: 16px;
  background: linear-gradient(160deg, rgba(43, 37, 96, 0.85), rgba(14, 42, 63, 0.9));
  border: 1px solid var(--line-gold);
  border-radius: var(--radius);
}

.page-about .about-side__note p {
  margin: 0 0 12px;
  font-size: 13.5px;
  color: var(--ice-blue);
}

/* 章节 */
.page-about .about-main {
  min-width: 0;
}

.page-about .about-section {
  padding: 34px 0 44px;
  border-top: 1px solid var(--ab-line);
}

.page-about .about-main > .about-section:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-section__head {
  max-width: 70ch;
}

.page-about .about-section__title {
  margin: 12px 0 12px;
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 5.2vw, 2.5rem);
  line-height: 1.14;
  font-weight: 800;
  letter-spacing: 0.01em;
  color: var(--ice-white);
}

.page-about .about-section__lede {
  margin: 0;
  font-size: 15.5px;
  color: rgba(243, 248, 251, 0.78);
}

/* 品牌起点 */
.page-about .about-origin {
  display: grid;
  gap: 26px;
  margin-top: 26px;
}

.page-about .about-origin__text p {
  margin: 0 0 16px;
  font-size: 15.5px;
  color: rgba(243, 248, 251, 0.8);
}

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

.page-about .about-stats {
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 22px;
  background: linear-gradient(160deg, rgba(14, 42, 63, 0.95), rgba(43, 37, 96, 0.78));
  border: 1px solid var(--line-gold);
  border-radius: var(--radius);
  box-shadow: 6px 6px 0 rgba(43, 37, 96, 0.5);
}

.page-about .about-stats > div {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(169, 214, 229, 0.14);
}

.page-about .about-stats > div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .about-stats dt {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--ice-blue);
}

.page-about .about-stats dd {
  margin: 0;
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 6px;
}

.page-about .about-stats__num {
  font-family: var(--font-display);
  font-size: 1.9rem;
  line-height: 1.1;
  color: var(--gold-bright);
  letter-spacing: 0.02em;
}

.page-about .about-stats__unit {
  font-size: 12.5px;
  color: var(--ice-blue);
}

/* 团队 */
.page-about .about-team-figure {
  margin: 24px 0 0;
}

.page-about .about-team-grid {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.page-about .about-cell {
  position: relative;
  padding: 20px 18px;
  background: linear-gradient(150deg, rgba(14, 42, 63, 0.96), rgba(7, 26, 43, 0.9));
  border: 1px solid var(--ab-line);
  border-radius: var(--radius);
  transition: transform 200ms var(--ease), border-color 200ms var(--ease),
    box-shadow 200ms var(--ease);
}

.page-about .about-cell:hover {
  transform: translate(-2px, -3px);
  border-color: var(--line-gold);
  box-shadow: 5px 6px 0 rgba(43, 37, 96, 0.85);
}

.page-about .about-cell__num {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--brand-gold);
}

.page-about .about-cell__title {
  margin: 0 0 8px;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ice-white);
}

.page-about .about-cell p:last-child {
  margin: 0;
  font-size: 14px;
  color: rgba(243, 248, 251, 0.76);
}

/* 产品原则 */
.page-about .about-principles {
  display: grid;
  gap: 14px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-principle {
  padding: 20px 18px 20px 22px;
  background: rgba(7, 26, 43, 0.72);
  border-left: 3px solid var(--brand-gold);
  border-top: 1px solid var(--ab-line);
  border-right: 1px solid var(--ab-line);
  border-bottom: 1px solid var(--ab-line);
  border-radius: var(--radius);
  transition: border-left-color 200ms var(--ease), background-color 200ms var(--ease);
}

.page-about .about-principle:hover {
  border-left-color: var(--track-orange);
  background: rgba(14, 42, 63, 0.92);
}

.page-about .about-principle__idx {
  display: inline-block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  color: var(--gold-bright);
}

.page-about .about-principle h3 {
  margin: 0 0 8px;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--ice-white);
}

.page-about .about-principle p {
  margin: 0;
  font-size: 14.5px;
  color: rgba(243, 248, 251, 0.78);
}

/* 版本时间线 */
.page-about .about-timeline-figure {
  margin: 24px 0 0;
}

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

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--brand-gold) 0%, rgba(217, 164, 65, 0.35) 55%, rgba(217, 164, 65, 0.06) 100%);
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: 16px;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 14px;
  width: 11px;
  height: 11px;
  background: var(--ice-deep);
  border: 2px solid var(--brand-gold);
  transform: rotate(45deg);
  transition: background-color 200ms var(--ease), box-shadow 200ms var(--ease),
    border-color 200ms var(--ease);
}

.page-about .about-timeline__item:hover::before {
  background: var(--gold-bright);
  border-color: var(--gold-bright);
  box-shadow: 0 0 0 5px rgba(245, 210, 122, 0.18);
}

.page-about .about-timeline__card {
  padding: 16px 18px;
  background: rgba(14, 42, 63, 0.78);
  border: 1px solid var(--ab-line);
  border-radius: var(--radius);
  transition: transform 200ms var(--ease), border-color 200ms var(--ease);
}

.page-about .about-timeline__item:hover .about-timeline__card {
  transform: translateX(3px);
  border-color: var(--line-gold);
}

.page-about .about-timeline__card .tag {
  display: inline-block;
  margin: 0 0 8px;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  border-radius: 1px;
}

.page-about .about-timeline__card h3 {
  margin: 0 0 6px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--ice-white);
}

.page-about .about-timeline__card p:last-child {
  margin: 0;
  font-size: 14px;
  color: rgba(243, 248, 251, 0.76);
}

/* 服务区域纸卡 */
.page-about .about-region-card {
  position: relative;
  margin-top: 26px;
  padding: 24px 20px;
  color: var(--ice-deep);
  background: var(--ab-paper);
  border: 1px solid rgba(217, 164, 65, 0.7);
  border-radius: var(--radius);
  box-shadow: 8px 8px 0 rgba(43, 37, 96, 0.55);
}

.page-about .about-region-card::before,
.page-about .about-region-card::after {
  content: "";
  position: absolute;
  width: 16px;
  height: 16px;
  border: 2px solid var(--brand-gold);
}

.page-about .about-region-card::before {
  top: 8px;
  left: 8px;
  border-right: 0;
  border-bottom: 0;
}

.page-about .about-region-card::after {
  bottom: 8px;
  right: 8px;
  border-left: 0;
  border-top: 0;
}

.page-about .about-region-card__row {
  display: grid;
  gap: 2px;
  padding: 12px 0;
  border-bottom: 1px dashed rgba(91, 113, 133, 0.35);
}

.page-about .about-region-card__row:first-child {
  padding-top: 0;
}

.page-about .about-region-card__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--data-slate);
}

.page-about .about-region-card__value {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.6;
  word-break: break-word;
  color: var(--ink);
}

.page-about .about-region-card__note {
  margin: 16px 0 0;
  padding-left: 12px;
  border-left: 3px solid var(--track-orange);
  font-size: 13.5px;
  color: #2c4356;
}

/* 合作生态 */
.page-about .about-partners {
  display: grid;
  gap: 14px;
  margin-top: 24px;
}

.page-about .about-partner {
  padding: 20px 18px;
  background: linear-gradient(200deg, rgba(43, 37, 96, 0.82), rgba(7, 26, 43, 0.94));
  border: 1px solid var(--ab-line);
  border-radius: var(--radius);
  transition: border-color 200ms var(--ease), transform 200ms var(--ease);
}

.page-about .about-partner:hover {
  border-color: var(--line-gold);
  transform: translateY(-2px);
}

.page-about .about-partner__num {
  margin: 0 0 4px;
  font-family: var(--font-display);
  font-size: 2.4rem;
  line-height: 1;
  color: var(--gold-bright);
  letter-spacing: 0.03em;
}

.page-about .about-partner h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--ice-white);
}

.page-about .about-partner p:last-child {
  margin: 0;
  font-size: 14px;
  color: rgba(243, 248, 251, 0.76);
}

.page-about .about-partners__tail {
  margin: 18px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--mint);
  font-size: 14.5px;
  color: rgba(243, 248, 251, 0.8);
}

/* 收束 */
.page-about .about-cta {
  margin-top: 40px;
  padding: 26px 20px;
  background:
    linear-gradient(135deg, rgba(255, 107, 44, 0.1), transparent 55%),
    linear-gradient(160deg, rgba(14, 42, 63, 0.96), rgba(43, 37, 96, 0.85));
  border: 1px solid var(--line-gold);
  border-radius: var(--radius);
  box-shadow: inset 0 0 0 1px rgba(169, 214, 229, 0.08);
}

.page-about .about-cta h2 {
  margin: 12px 0 10px;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 5vw, 2.2rem);
  line-height: 1.16;
  font-weight: 800;
  color: var(--ice-white);
}

.page-about .about-cta p {
  max-width: 60ch;
  margin: 0;
  font-size: 14.5px;
  color: rgba(243, 248, 251, 0.8);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.page-about .about-cta__actions .btn {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
}

/* 平板与桌面 */
@media (min-width: 640px) {
  .page-about .about-team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-about .about-region-card {
    padding: 28px 26px;
  }

  .page-about .about-cta {
    padding: 32px 28px;
  }
}

@media (min-width: 768px) {
  .page-about .about-origin {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.9fr);
    gap: 30px;
  }

  .page-about .about-stats {
    align-self: start;
  }

  .page-about .about-region-card__row {
    grid-template-columns: 132px minmax(0, 1fr);
    align-items: baseline;
    gap: 16px;
  }
}

@media (min-width: 1024px) {
  .page-about {
    padding-bottom: 88px;
  }

  .page-about .about-mast {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.02fr);
    align-items: end;
    gap: 48px;
    padding: 36px 0 52px;
  }

  .page-about .about-body {
    grid-template-columns: 216px minmax(0, 1fr);
    gap: 64px;
    padding-top: 48px;
  }

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

  .page-about .about-toc ol {
    display: block;
  }

  .page-about .about-toc li + li {
    margin-top: 4px;
  }

  .page-about .about-toc a {
    border: 0;
    border-left: 2px solid var(--ab-line-strong);
    background: transparent;
    padding: 10px 12px;
  }

  .page-about .about-toc a[aria-current="true"],
  .page-about .about-toc a.is-current {
    background: rgba(217, 164, 65, 0.14);
    border-left-color: var(--brand-gold);
    color: var(--gold-bright);
  }

  .page-about .about-mast__lede {
    font-size: 17px;
  }

  .page-about .about-section {
    padding: 44px 0 56px;
  }

  .page-about .about-origin__text p,
  .page-about .about-section__lede {
    font-size: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-cell,
  .page-about .about-timeline__card,
  .page-about .about-timeline__item::before,
  .page-about .about-partner,
  .page-about .about-toc a {
    transition: none;
  }

  .page-about .about-cell:hover,
  .page-about .about-timeline__item:hover .about-timeline__card,
  .page-about .about-partner:hover {
    transform: none;
  }
}
<<<END>>>