.page-about {
  --about-line: 1px solid rgba(18, 28, 51, 0.12);
  --about-line-inverse: 1px solid rgba(246, 243, 236, 0.18);
  background: var(--paper);
  color: var(--ink);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 4vw, 40px) 0 clamp(40px, 7vw, 84px);
  background: linear-gradient(155deg, var(--deep) 0%, var(--blue) 54%, var(--dusk) 100%);
  color: var(--paper);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -18%;
  bottom: -46%;
  width: 78%;
  height: 96%;
  background: radial-gradient(closest-side, rgba(43, 240, 214, 0.3), rgba(43, 240, 214, 0));
  pointer-events: none;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  left: -14%;
  top: -32%;
  width: 52%;
  height: 70%;
  background: radial-gradient(closest-side, rgba(255, 162, 58, 0.16), rgba(255, 162, 58, 0));
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 5vw, 52px);
}

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

.page-about .about-hero .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0 0 clamp(22px, 4vw, 40px);
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
}

.page-about .about-hero .breadcrumb-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.page-about .about-hero .breadcrumb-link {
  color: rgba(246, 243, 236, 0.7);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.page-about .about-hero .breadcrumb-link:hover,
.page-about .about-hero .breadcrumb-link:focus-visible {
  color: var(--neon);
  border-bottom-color: var(--neon);
}

.page-about .about-hero .breadcrumb-sep {
  color: rgba(246, 243, 236, 0.36);
}

.page-about .about-hero .breadcrumb-current {
  color: var(--neon);
}

.page-about .about-hero__eyebrow {
  margin: 0 0 14px;
  font-size: var(--fs-12);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--amber);
}

.page-about .about-hero__title {
  margin: 0 0 clamp(18px, 3vw, 28px);
  max-width: 17ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 7.4vw, 72px);
  line-height: 1.06;
  letter-spacing: -0.03em;
  color: var(--paper);
}

.page-about .about-hero__lede {
  margin: 0 0 clamp(22px, 3.4vw, 32px);
  max-width: 34em;
  font-family: var(--font-editorial);
  font-size: clamp(16px, 2.2vw, 20px);
  line-height: 1.78;
  color: rgba(246, 243, 236, 0.86);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: clamp(26px, 4vw, 40px);
}

.page-about .about-hero .btn--ghost {
  border-color: rgba(246, 243, 236, 0.42);
  color: var(--paper);
}

.page-about .about-hero .btn--ghost:hover,
.page-about .about-hero .btn--ghost:focus-visible {
  border-color: var(--neon);
  color: var(--neon);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 18px;
  margin: 0;
  padding-top: clamp(20px, 3vw, 28px);
  border-top: var(--about-line-inverse);
}

.page-about .about-fact dt {
  margin-bottom: 4px;
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  color: rgba(246, 243, 236, 0.62);
}

.page-about .about-fact dd {
  margin: 0;
  font-size: clamp(20px, 3vw, 26px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--neon);
}

.page-about .about-hero__side {
  align-self: end;
  padding: clamp(20px, 3vw, 28px);
  border: var(--about-line-inverse);
  border-radius: var(--r-lg);
  background: rgba(14, 27, 61, 0.42);
  box-shadow: var(--shadow-capsule);
}

.page-about .about-hero__side-label {
  margin: 0 0 16px;
  font-size: var(--fs-12);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--amber);
}

.page-about .about-hero__side-list {
  margin: 0 0 16px;
  padding: 0;
  list-style: none;
}

.page-about .about-hero__side-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 6px 14px;
  padding: 11px 0;
  border-bottom: 1px dashed rgba(246, 243, 236, 0.16);
}

.page-about .about-hero__side-list li:last-child {
  border-bottom: 0;
}

.page-about .about-hero__side-key {
  font-size: var(--fs-14);
  color: rgba(246, 243, 236, 0.68);
}

.page-about .about-hero__side-val {
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  color: var(--paper);
}

.page-about .about-hero__side-note {
  margin: 0;
  font-size: var(--fs-12);
  line-height: 1.7;
  color: rgba(246, 243, 236, 0.56);
}

/* ---------- 通用区块骨架 ---------- */
.page-about .about-section {
  padding: clamp(48px, 8vw, 96px) 0;
}

.page-about .about-head {
  max-width: 46rem;
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-about .eyebrow {
  display: inline-block;
  margin: 0 0 14px;
  padding: 5px 12px;
  border: 1px solid var(--mist);
  border-radius: var(--r-pill);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--blue);
}

.page-about .about-head h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(25px, 4.6vw, 44px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-about .about-head__text {
  margin: 0;
  max-width: 40em;
  font-size: var(--fs-16);
  line-height: 1.8;
  color: rgba(18, 28, 51, 0.72);
}

.page-about .media-caption {
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  line-height: 1.7;
  color: rgba(18, 28, 51, 0.55);
}

/* ---------- 发展阶段 ---------- */
.page-about .about-journey__figure {
  margin: 0 0 clamp(28px, 4vw, 44px);
}

.page-about .about-journey__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-soft);
}

.page-about .about-journey__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3.5vw, 36px);
}

.page-about .about-journey__list {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding: 0 0 8px;
  scrollbar-width: thin;
}

.page-about .about-journey__list .tab {
  flex: 0 0 auto;
  display: grid;
  gap: 3px;
  min-width: 148px;
  padding: 12px 16px;
  border: 1px solid var(--mist);
  border-radius: var(--r-md);
  background: #fff;
  text-align: left;
  cursor: pointer;
  font-family: var(--font-body);
  color: var(--ink);
  transition: background 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}

.page-about .about-journey__list .tab:hover {
  border-color: var(--blue);
}

.page-about .about-journey__list .tab:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}

.page-about .about-stage__num {
  font-size: var(--fs-12);
  color: rgba(18, 28, 51, 0.5);
}

.page-about .about-stage__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--fs-18);
  letter-spacing: -0.01em;
}

.page-about .about-stage__note {
  font-size: var(--fs-12);
  color: rgba(18, 28, 51, 0.56);
}

.page-about .about-journey__list .tab[aria-selected="true"] {
  background: var(--blue);
  border-color: var(--blue);
  color: var(--paper);
}

.page-about .about-journey__list .tab[aria-selected="true"] .about-stage__num {
  color: var(--neon);
}

.page-about .about-journey__list .tab[aria-selected="true"] .about-stage__note {
  color: rgba(246, 243, 236, 0.72);
}

.page-about .about-stage-panel {
  padding: clamp(20px, 3.4vw, 38px);
  border: 1px solid var(--mist);
  border-radius: var(--r-lg);
  background: #fff;
  box-shadow: var(--shadow-soft);
}

.page-about .tab-panel[hidden] {
  display: none;
}

.page-about .about-stage-panel__meta {
  margin: 0 0 10px;
  font-size: var(--fs-12);
  letter-spacing: 0.14em;
  color: var(--amber);
}

.page-about .about-stage-panel h3 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 3vw, 27px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .about-stage-panel p {
  margin: 0 0 12px;
  max-width: 38em;
  font-size: var(--fs-16);
  line-height: 1.82;
  color: rgba(18, 28, 51, 0.78);
}

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

.page-about .about-stage-panel a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 2px solid var(--neon);
  transition: color 0.18s ease;
}

.page-about .about-stage-panel a:hover,
.page-about .about-stage-panel a:focus-visible {
  color: var(--dusk);
}

/* ---------- 团队分工 ---------- */
.page-about .about-team {
  background: var(--mint);
}

.page-about .about-flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin-bottom: clamp(26px, 4vw, 40px);
}

.page-about .about-flow__node {
  padding: clamp(18px, 3vw, 24px);
  border: 1px solid rgba(27, 58, 140, 0.14);
  border-radius: var(--r-md);
  background: #fff;
  box-shadow: var(--shadow-soft);
}

.page-about .about-flow__node--edit {
  border-top: 4px solid var(--blue);
}

.page-about .about-flow__node--audit {
  border-top: 4px solid var(--dusk);
}

.page-about .about-flow__node--service {
  border-top: 4px solid var(--amber);
}

.page-about .about-flow__num {
  display: inline-block;
  margin-bottom: 8px;
  font-size: var(--fs-12);
  letter-spacing: 0.16em;
  color: rgba(27, 58, 140, 0.7);
}

.page-about .about-flow__node h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--fs-18);
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .about-flow__node p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.78;
  color: rgba(18, 28, 51, 0.74);
}

.page-about .about-flow__link {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 30px;
}

.page-about .about-flow__link::before {
  content: "";
  width: 2px;
  height: 100%;
  border-radius: var(--r-pill);
  background: linear-gradient(180deg, var(--neon), var(--amber));
}

.page-about .about-team__body {
  display: grid;
  gap: 16px;
  margin-bottom: clamp(26px, 4vw, 40px);
}

.page-about .about-team__body p {
  margin: 0;
  max-width: 42em;
  font-size: var(--fs-16);
  line-height: 1.84;
  color: rgba(18, 28, 51, 0.8);
}

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

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-soft);
}

/* ---------- 服务标准 ---------- */
.page-about .about-standards {
  background: linear-gradient(150deg, var(--deep) 0%, #16224a 58%, var(--dusk) 100%);
  color: var(--paper);
}

.page-about .about-standards .eyebrow {
  border-color: rgba(246, 243, 236, 0.28);
  color: var(--neon);
}

.page-about .about-head--inverse h2 {
  color: var(--paper);
}

.page-about .about-head--inverse .about-head__text {
  color: rgba(246, 243, 236, 0.72);
}

.page-about .about-metrics {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  border-top: var(--about-line-inverse);
}

.page-about .about-metric {
  padding: clamp(20px, 3vw, 30px) 0;
  border-bottom: var(--about-line-inverse);
}

.page-about .about-metric__num {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin: 0 0 8px;
  font-size: clamp(44px, 9vw, 76px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--neon);
}

.page-about .about-metric__unit {
  font-family: var(--font-body);
  font-size: var(--fs-18);
  font-weight: 600;
  letter-spacing: 0;
  color: var(--amber);
}

.page-about .about-metric__label {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--fs-18);
  color: var(--paper);
}

.page-about .about-metric__note {
  margin: 0;
  max-width: 26em;
  font-size: var(--fs-14);
  line-height: 1.78;
  color: rgba(246, 243, 236, 0.68);
}

.page-about .about-standards__foot {
  margin: clamp(22px, 3.4vw, 32px) 0 0;
  max-width: 44em;
  font-size: var(--fs-14);
  line-height: 1.82;
  color: rgba(246, 243, 236, 0.7);
}

.page-about .about-standards__foot a {
  color: var(--amber);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 162, 58, 0.5);
}

.page-about .about-standards__foot a:hover,
.page-about .about-standards__foot a:focus-visible {
  color: var(--neon);
  border-bottom-color: var(--neon);
}

/* ---------- 内容与合作生态 ---------- */
.page-about .about-partners__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 44px);
}

.page-about .about-partners__main p {
  margin: 0 0 16px;
  max-width: 40em;
  font-size: var(--fs-16);
  line-height: 1.84;
  color: rgba(18, 28, 51, 0.78);
}

.page-about .about-partners__link {
  margin-bottom: 0;
}

.page-about .about-partners__link a {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-16);
  color: var(--blue);
  text-decoration: none;
  border-bottom: 2px solid var(--amber);
  padding-bottom: 2px;
}

.page-about .about-partners__link a:hover,
.page-about .about-partners__link a:focus-visible {
  color: var(--dusk);
  border-bottom-color: var(--neon);
}

.page-about .about-partners__side {
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid var(--mist);
  border-radius: var(--r-lg);
  background: var(--dusk);
  color: var(--paper);
  box-shadow: var(--shadow-soft);
}

.page-about .about-partners__side-title {
  margin: 0 0 16px;
  font-size: var(--fs-12);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--neon);
}

.page-about .about-partners__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-partners__list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
  padding: 12px 0;
  border-bottom: 1px dashed rgba(246, 243, 236, 0.2);
  font-size: var(--fs-14);
  line-height: 1.7;
  color: rgba(246, 243, 236, 0.82);
}

.page-about .about-partners__list li:last-child {
  border-bottom: 0;
}

.page-about .about-partners__list .mono {
  font-size: var(--fs-24);
  font-weight: 700;
  color: var(--amber);
}

/* ---------- 我们在意的一件事 ---------- */
.page-about .about-legacy {
  position: relative;
  overflow: hidden;
  padding: clamp(48px, 8vw, 96px) 0;
  background: var(--paper);
  border-top: var(--about-line);
}

.page-about .about-legacy__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.14;
  pointer-events: none;
}

.page-about .about-legacy__inner {
  position: relative;
  z-index: 1;
  max-width: 52rem;
}

.page-about .about-legacy__title {
  margin: 0 0 clamp(20px, 3vw, 28px);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 4.4vw, 42px);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--blue);
}

.page-about .about-legacy__quote {
  margin: 0 0 clamp(20px, 3vw, 28px);
  padding-left: clamp(16px, 3vw, 24px);
  border-left: 4px solid var(--neon);
  font-family: var(--font-editorial);
  font-size: clamp(17px, 2.4vw, 22px);
  line-height: 1.78;
  color: var(--ink);
}

.page-about .about-legacy__text {
  margin: 0 0 18px;
  max-width: 40em;
  font-size: var(--fs-16);
  line-height: 1.84;
  color: rgba(18, 28, 51, 0.78);
}

.page-about .about-legacy__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin: 0;
}

.page-about .about-legacy__links a {
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid var(--mist);
  padding-bottom: 2px;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.page-about .about-legacy__links a:hover,
.page-about .about-legacy__links a:focus-visible {
  color: var(--dusk);
  border-bottom-color: var(--amber);
}

/* ---------- 收束 CTA ---------- */
.page-about .about-cta {
  padding: clamp(32px, 5vw, 60px) 0;
  background: linear-gradient(120deg, var(--blue), var(--dusk));
  color: var(--paper);
}

.page-about .about-cta__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 32px);
  align-items: center;
}

.page-about .about-cta h2 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3.6vw, 34px);
  line-height: 1.24;
  letter-spacing: -0.02em;
}

.page-about .about-cta p {
  margin: 0;
  max-width: 40em;
  font-size: var(--fs-14);
  line-height: 1.82;
  color: rgba(246, 243, 236, 0.78);
}

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

.page-about .about-cta .btn--ghost {
  border-color: rgba(246, 243, 236, 0.42);
  color: var(--paper);
}

.page-about .about-cta .btn--ghost:hover,
.page-about .about-cta .btn--ghost:focus-visible {
  border-color: var(--neon);
  color: var(--neon);
}

/* ---------- 响应式增强 ---------- */
@media (min-width: 620px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-metrics {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 clamp(20px, 3vw, 36px);
    border-top: 0;
  }

  .page-about .about-metric {
    border-top: var(--about-line-inverse);
  }
}

@media (min-width: 880px) {
  .page-about .about-flow {
    grid-template-columns: minmax(0, 1fr) 56px minmax(0, 1fr) 56px minmax(0, 1fr);
    align-items: stretch;
  }

  .page-about .about-flow__link {
    height: auto;
    width: 56px;
  }

  .page-about .about-flow__link::before {
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--neon), var(--amber));
  }

  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.9fr);
    align-items: start;
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
  }

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

  .page-about .about-journey__list .tab {
    min-width: 0;
    width: 100%;
    border: 0;
    border-left: 2px solid var(--mist);
    border-radius: 0;
    background: transparent;
    padding: 16px 18px;
  }

  .page-about .about-journey__list .tab[aria-selected="true"] {
    background: var(--mint);
    border-left-color: var(--neon);
    color: var(--blue);
  }

  .page-about .about-journey__list .tab[aria-selected="true"] .about-stage__num {
    color: var(--blue);
  }

  .page-about .about-journey__list .tab[aria-selected="true"] .about-stage__note {
    color: rgba(27, 58, 140, 0.7);
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 0.85fr);
    align-items: end;
  }

  .page-about .about-journey__grid {
    grid-template-columns: 268px minmax(0, 1fr);
    align-items: start;
    gap: clamp(28px, 4vw, 48px);
  }

  .page-about .about-journey__list {
    position: sticky;
    top: 96px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-journey__list .tab,
  .page-about .about-legacy__links a,
  .page-about .about-hero .breadcrumb-link {
    transition: none;
  }
}
<<<PAGE_CSS_END>>>