.page-about {
  --about-max: 1180px;
  --about-pad: 20px;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  line-height: 1.75;
  padding-bottom: 64px;
  overflow-x: hidden;
}

.page-about *,
.page-about *::before,
.page-about *::after {
  box-sizing: border-box;
}

.page-about .about-wrap {
  width: 100%;
  max-width: var(--about-max);
  margin: 0 auto;
  padding-inline: var(--about-pad);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(88% 120% at 88% 2%, rgba(47, 111, 106, 0.22), transparent 62%),
    var(--ink);
}

.page-about .about-hero__grid {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image: linear-gradient(90deg, rgba(35, 65, 92, 0.55) 1px, transparent 1px);
  background-size: 84px 100%;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 92%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 92%);
}

.page-about .about-hero__slab {
  position: absolute;
  top: -10%;
  right: -18%;
  width: 68%;
  height: 122%;
  z-index: 1;
  pointer-events: none;
  background: linear-gradient(150deg, rgba(231, 169, 59, 0.20), rgba(47, 111, 106, 0.14) 48%, rgba(8, 24, 38, 0) 80%);
  clip-path: polygon(28% 0, 100% 0, 100% 100%, 0 100%);
  transform: rotate(-7deg);
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 2;
  padding-block: 24px 36px;
}

.page-about .crumbs-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0 0 26px;
  padding: 0;
  font-size: 12px;
  color: var(--cool);
}

.page-about .crumbs-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.page-about .crumbs-item + .crumbs-item::before {
  content: "/";
  color: var(--line);
}

.page-about .crumbs-list a {
  color: var(--cool);
  text-decoration: none;
  transition: color var(--ease);
}

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

.page-about .about-eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.page-about .about-eyebrow__rule {
  display: block;
  width: 26px;
  height: 1px;
  background: var(--gold-dark);
}

.page-about .about-title {
  margin: 0;
  max-width: 22ch;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(32px, 7.4vw, 62px);
  line-height: 1.06;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-title span {
  color: var(--gold);
}

.page-about .about-lead {
  margin: 18px 0 0;
  max-width: 58ch;
  font-size: 16px;
  color: var(--mist);
}

.page-about .about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-metrics li {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 14px 16px;
  background: var(--ink-2);
}

.page-about .about-metrics__val {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--gold);
  line-height: 1.3;
}

.page-about .about-metrics__key {
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--cool);
}

/* ---------- 主体骨架 ---------- */
.page-about .about-body {
  padding-top: 38px;
}

.page-about .about-layout {
  display: grid;
  gap: 28px;
}

.page-about .about-axis {
  border-top: 1px solid var(--line);
  padding-top: 12px;
}

.page-about .about-axis .axis-list {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-axis .axis-link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 10px;
  border-left: 2px solid transparent;
  border-radius: var(--radius-sm);
  color: var(--cool);
  font-size: 13px;
  white-space: nowrap;
  text-decoration: none;
  transition: color var(--ease), background var(--ease), border-color var(--ease);
}

.page-about .about-axis .axis-link:hover {
  color: var(--paper);
  background: rgba(35, 65, 92, 0.42);
}

.page-about .about-axis .axis-link:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
}

.page-about .about-axis .axis-link.is-active {
  color: var(--paper);
  border-left-color: var(--orange);
  background: rgba(231, 169, 59, 0.10);
}

.page-about .about-axis .axis-idx {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--gold);
}

/* ---------- 章节头 ---------- */
.page-about .about-sec {
  margin: 0 0 46px;
}

.page-about .about-sec:last-of-type {
  margin-bottom: 0;
}

.page-about .about-sec__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
  margin: 0 0 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(35, 65, 92, 0.7);
}

.page-about .about-sec__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-about .about-sec__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(23px, 4.6vw, 33px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-p {
  margin: 0 0 14px;
  max-width: 62ch;
  font-size: 15.5px;
  color: var(--mist);
}

.page-about .about-p--note {
  margin-top: 18px;
  font-size: 14px;
  color: var(--cool);
}

.page-about .about-p a,
.page-about .line-card a {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid var(--gold-dark);
  transition: color var(--ease), border-color var(--ease);
}

.page-about .about-p a:hover,
.page-about .line-card a:hover {
  color: var(--orange);
  border-color: var(--orange);
}

/* ---------- 业务线卡片 ---------- */
.page-about .about-lines {
  display: grid;
  gap: 14px;
  margin-top: 20px;
}

.page-about .line-card {
  position: relative;
  padding: 18px 18px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(170deg, var(--ink-2), rgba(15, 34, 54, 0.55));
  overflow: hidden;
}

.page-about .line-card--wide {
  background: linear-gradient(120deg, rgba(231, 169, 59, 0.13), rgba(15, 34, 54, 0.9) 62%);
  border-color: var(--gold-dark);
}

.page-about .line-card__tag {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--orange);
}

.page-about .line-card h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  line-height: 1.3;
  color: var(--paper);
}

.page-about .line-card p {
  margin: 0;
  font-size: 14.5px;
  color: var(--mist);
}

.page-about .line-card ul {
  margin: 10px 0 0;
  padding-left: 16px;
  font-size: 13.5px;
  color: var(--cool);
}

.page-about .line-card ul li {
  margin-bottom: 4px;
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 0 0 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink-2);
  overflow: hidden;
}

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

.page-about .about-figure figcaption {
  padding: 10px 14px;
  font-size: 12.5px;
  color: var(--cool);
  border-top: 1px solid var(--line);
}

.page-about .about-figure--eco {
  margin-bottom: 0;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 18px;
  bottom: 18px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold), var(--line) 36%, var(--line));
}

.page-about .tl-item {
  position: relative;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 20px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--ink);
  border: 1px solid var(--gold);
  z-index: 1;
}

.page-about .tl-item--now::before {
  background: var(--orange);
  border-color: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 107, 53, 0.16);
}

.page-about .tl-node {
  border-bottom: 1px solid rgba(35, 65, 92, 0.6);
}

.page-about .tl-node > summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding: 14px 0 14px 34px;
  cursor: pointer;
  list-style: none;
}

.page-about .tl-node > summary::-webkit-details-marker {
  display: none;
}

.page-about .tl-node > summary:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.page-about .tl-year {
  font-family: var(--font-mono);
  font-size: 17px;
  letter-spacing: 0.02em;
  color: var(--gold);
}

.page-about .tl-name {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 600;
  line-height: 1.3;
  color: var(--paper);
  transition: color var(--ease);
}

.page-about .tl-node > summary:hover .tl-name {
  color: var(--gold);
}

.page-about .tl-hint {
  display: grid;
  place-items: center;
  width: 20px;
  height: 20px;
  margin-left: auto;
  border: 1px solid var(--line);
  border-radius: 50%;
  transition: transform var(--ease), border-color var(--ease);
}

.page-about .tl-hint::before {
  content: "+";
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1;
  color: var(--gold);
}

.page-about .tl-node[open] .tl-hint {
  transform: rotate(45deg);
  border-color: var(--gold-dark);
}

.page-about .tl-body {
  padding: 0 0 18px 34px;
}

.page-about .tl-body p {
  margin: 0 0 10px;
  max-width: 60ch;
  font-size: 14.5px;
  color: var(--mist);
}

.page-about .tl-body a {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid var(--gold-dark);
}

.page-about .tl-body a:hover {
  color: var(--orange);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: 24px;
  margin-top: 18px;
  align-items: center;
}

.page-about .team-donut {
  position: relative;
  width: min(250px, 72%);
  aspect-ratio: 1 / 1;
  margin-inline: auto;
  border-radius: 50%;
  background: conic-gradient(
    var(--gold) 0 25%,
    var(--orange) 25% 58.33%,
    var(--teal) 58.33% 80.56%,
    var(--cool) 80.56% 100%
  );
}

.page-about .team-donut::before {
  content: "";
  position: absolute;
  inset: 24%;
  border-radius: 50%;
  background: var(--ink-2);
  border: 1px solid var(--line);
}

.page-about .team-donut__label {
  position: absolute;
  inset: 0;
  display: grid;
  align-content: center;
  justify-items: center;
  text-align: center;
  z-index: 1;
}

.page-about .team-donut__num {
  font-family: var(--font-mono);
  font-size: 34px;
  line-height: 1;
  color: var(--paper);
}

.page-about .team-donut__txt {
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cool);
}

.page-about .team-legend {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .team-legend li {
  display: grid;
  grid-template-columns: 10px minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(15, 34, 54, 0.65);
  transition: transform var(--ease), border-color var(--ease), background var(--ease);
}

.page-about .team-legend li:hover {
  transform: translateX(3px);
  border-color: var(--gold-dark);
  background: rgba(231, 169, 59, 0.07);
}

.page-about .team-legend__dot {
  width: 10px;
  height: 10px;
  border-radius: 2px;
}

.page-about .team-legend__name {
  font-size: 14.5px;
  color: var(--paper);
  line-height: 1.45;
}

.page-about .team-legend__name small {
  display: block;
  margin-top: 2px;
  font-size: 12px;
  color: var(--cool);
}

.page-about .team-legend__num {
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--gold);
}

/* ---------- 做事方式 ---------- */
.page-about .about-principles {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.page-about .prin {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink-2);
}

.page-about .prin--lead {
  background: linear-gradient(165deg, rgba(231, 169, 59, 0.14), rgba(15, 34, 54, 0.92) 62%);
  border-color: var(--gold-dark);
}

.page-about .prin__idx {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.page-about .prin h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  line-height: 1.3;
  color: var(--paper);
}

.page-about .prin p {
  margin: 0;
  font-size: 14.5px;
  color: var(--mist);
}

.page-about .prin ul {
  margin: 2px 0 0;
  padding-left: 16px;
  font-size: 13.5px;
  color: var(--cool);
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco {
  display: grid;
  gap: 22px;
  margin-top: 18px;
  align-items: start;
}

.page-about .eco-list {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .eco-list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 2px 14px;
  padding: 15px 16px;
  background: var(--ink-2);
}

.page-about .eco-num {
  grid-row: span 2;
  font-family: var(--font-mono);
  font-size: 21px;
  line-height: 1.4;
  color: var(--gold);
}

.page-about .eco-list strong {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  color: var(--paper);
}

.page-about .eco-list p {
  margin: 0;
  font-size: 13.5px;
  color: var(--cool);
}

/* ---------- 资质与保障 ---------- */
.page-about .about-assure {
  display: grid;
  gap: 16px;
  margin-top: 20px;
}

.page-about .assure {
  padding: 4px 0 4px 16px;
  border-left: 2px solid var(--gold);
  background: linear-gradient(90deg, rgba(231, 169, 59, 0.09), transparent 72%);
}

.page-about .assure h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  line-height: 1.35;
  color: var(--paper);
}

.page-about .assure p {
  margin: 0;
  font-size: 14.5px;
  color: var(--mist);
}

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

.page-about .assure a:hover {
  color: var(--orange);
}

/* ---------- CTA ---------- */
.page-about .about-cta {
  display: grid;
  gap: 18px;
  margin-top: 44px;
  padding: 24px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(120% 160% at 6% 0%, rgba(255, 107, 53, 0.18), transparent 60%),
    var(--ink-2);
}

.page-about .about-cta h2 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(21px, 4.2vw, 28px);
  font-weight: 700;
  line-height: 1.3;
  color: var(--paper);
}

.page-about .about-cta p {
  margin: 0;
  max-width: 52ch;
  font-size: 14.5px;
  color: var(--mist);
}

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

/* ---------- 动效 ---------- */
@media (prefers-reduced-motion: no-preference) {
  .page-about [data-reveal].is-in {
    animation: aboutRise 420ms ease both;
  }
}

@keyframes aboutRise {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 720px) {
  .page-about {
    --about-pad: 28px;
  }

  .page-about .about-hero__inner {
    padding-block: 30px 46px;
  }

  .page-about .about-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .line-card--wide {
    grid-column: 1 / -1;
  }

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

@media (min-width: 860px) {
  .page-about .about-principles {
    grid-template-columns: 1.25fr 1fr 1fr;
    align-items: stretch;
  }

  .page-about .about-eco {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    gap: 30px;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    padding: 28px 30px;
  }

  .page-about .about-cta__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 940px) {
  .page-about .about-body {
    padding-top: 48px;
  }

  .page-about .about-layout {
    grid-template-columns: 196px minmax(0, 1fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .about-axis {
    position: sticky;
    top: 24px;
    border-top: none;
    border-left: 1px solid var(--line);
    padding: 4px 0 0 14px;
  }

  .page-about .about-axis .axis-list {
    flex-direction: column;
    gap: 2px;
    padding-bottom: 0;
    overflow: visible;
  }

  .page-about .about-axis .axis-link {
    border-left: 2px solid transparent;
    margin-left: -15px;
    padding-left: 13px;
  }

  .page-about .about-team {
    grid-template-columns: 250px minmax(0, 1fr);
    gap: 36px;
  }

  .page-about .team-donut {
    width: 100%;
  }
}

@media (min-width: 1120px) {
  .page-about .about-sec {
    margin-bottom: 56px;
  }

  .page-about .about-title {
    max-width: 20ch;
  }
}
<<<END>>>