.page-about {
  --about-line-soft: rgba(159, 182, 196, 0.2);
  --about-tint: rgba(55, 224, 216, 0.12);
  color: var(--text-primary);
  padding-bottom: clamp(56px, 8vw, 110px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(40px, 6vw, 84px) 0 clamp(32px, 4.6vw, 60px);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(58% 78% at 8% 0%, rgba(55, 224, 216, 0.13), transparent 62%),
    radial-gradient(48% 62% at 96% 6%, rgba(242, 196, 107, 0.1), transparent 64%);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  min-width: 0;
}

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

.page-about .about-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 clamp(18px, 3vw, 30px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
}

.page-about .about-crumbs a {
  color: var(--text-secondary);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-about .about-crumbs a:hover {
  color: var(--cyan-400);
  border-bottom-color: var(--cyan-400);
}

.page-about .about-crumbs [aria-current="page"] {
  color: var(--gold-400);
}

.page-about .about-kicker {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan-400);
}

.page-about .about-hero__title {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(31px, 5.2vw, 60px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.page-about .about-hero__title em {
  display: block;
  font-style: normal;
  color: var(--cyan-400);
}

.page-about .about-hero__lead {
  margin: 0 0 clamp(22px, 3vw, 32px);
  max-width: 56ch;
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.85;
  color: var(--text-secondary);
}

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

/* 基本信息卡 */
.page-about .about-summary {
  min-width: 0;
  padding: clamp(18px, 2.4vw, 26px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(158deg, rgba(13, 44, 66, 0.96), rgba(8, 30, 46, 0.66));
  box-shadow: var(--shadow-soft);
}

.page-about .about-summary__title {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold-400);
}

.page-about .about-summary__list {
  margin: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-summary__row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  align-items: baseline;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--about-line-soft);
}

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

.page-about .about-summary__row dt {
  font-size: 13px;
  color: var(--text-secondary);
}

.page-about .about-summary__row dd {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  text-align: right;
}

.page-about .about-summary__mono {
  font-family: var(--font-mono);
  font-size: 13px !important;
  letter-spacing: 0.04em;
  color: var(--gold-400) !important;
}

/* ---------- 主体分栏 ---------- */
.page-about .about-body {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  padding-top: clamp(36px, 5vw, 68px);
  min-width: 0;
}

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

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

.page-about .about-index__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--gold-400);
}

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

.page-about .about-index__list a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 6px 12px;
  border: 1px solid var(--about-line-soft);
  border-radius: var(--radius-pill);
  font-size: 13px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease), background 0.25s var(--ease);
}

.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible {
  color: var(--text-primary);
  border-color: var(--cyan-400);
  background: var(--about-tint);
}

.page-about .about-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--gold-400);
}

/* ---------- 章节通用 ---------- */
.page-about .about-sec {
  padding-block: clamp(34px, 4.6vw, 58px);
  border-top: 1px solid var(--about-line-soft);
}

.page-about .about-sec:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-about .about-sec__head {
  display: grid;
  gap: 8px;
  margin-bottom: clamp(16px, 2.4vw, 26px);
}

.page-about .about-sec__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold-400);
}

.page-about .about-sec h2 {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(22px, 3vw, 34px);
  line-height: 1.26;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.page-about .about-sec__body p {
  margin: 0 0 1.05em;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-secondary);
}

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

.page-about .about-mark {
  color: var(--text-primary);
  font-weight: 600;
  border-bottom: 1px solid rgba(55, 224, 216, 0.5);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  position: relative;
  margin-top: clamp(18px, 2.6vw, 30px);
}

.page-about .about-timeline__texture {
  position: absolute;
  inset: 0;
  overflow: hidden;
  border-radius: var(--radius-lg);
  opacity: 0.16;
  pointer-events: none;
}

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

.page-about .about-timeline__list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 2px 0;
  display: grid;
  gap: 14px;
}

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan-400), rgba(55, 224, 216, 0.25) 48%, var(--gold-400));
}

.page-about .about-stage {
  position: relative;
  padding-left: 30px;
}

.page-about .about-stage::before {
  content: "";
  position: absolute;
  left: 0;
  top: 24px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  border: 1px solid var(--cyan-400);
  background: var(--ink-900);
  transition: background 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.page-about .about-stage:hover::before,
.page-about .about-stage__panel[open] ~ * ::before {
  background: var(--cyan-400);
}

.page-about .about-stage:hover::before,
.page-about .about-stage:focus-within::before {
  background: var(--cyan-400);
  box-shadow: 0 0 0 5px rgba(55, 224, 216, 0.14);
}

.page-about .about-stage__panel {
  display: block;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(13, 44, 66, 0.86);
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease);
}

.page-about .about-stage:hover .about-stage__panel {
  border-color: rgba(55, 224, 216, 0.58);
  transform: translateY(-2px);
}

.page-about .about-stage__panel summary {
  display: grid;
  gap: 5px;
  padding: 15px clamp(16px, 2.2vw, 22px);
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-stage__panel summary:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 2px;
  border-radius: var(--radius-lg);
}

.page-about .about-stage__year {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--gold-400);
}

.page-about .about-stage__title {
  font-family: var(--font-heading);
  font-size: clamp(16px, 1.9vw, 19px);
  font-weight: 700;
  line-height: 1.42;
  color: var(--text-primary);
}

.page-about .about-stage__body {
  display: grid;
  gap: 10px;
  padding: 0 clamp(16px, 2.2vw, 22px) 18px;
}

.page-about .about-stage__body p {
  margin: 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-secondary);
}

.page-about .about-stage__flag {
  display: inline-block;
  margin-right: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--cyan-400);
}

.page-about .about-stage--light .about-stage__panel {
  background: var(--surface-soft);
  border-color: rgba(5, 19, 31, 0.1);
}

.page-about .about-stage--light .about-stage__title {
  color: var(--ink-950);
}

.page-about .about-stage--light .about-stage__year,
.page-about .about-stage--light .about-stage__body p {
  color: var(--ink-700);
}

.page-about .about-stage--light .about-stage__flag {
  color: var(--ink-950);
}

.page-about .about-timeline__note {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  max-width: 62ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-secondary);
}

.page-about .about-timeline__note a {
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(55, 224, 216, 0.4);
}

.page-about .about-timeline__note a:hover {
  border-bottom-color: var(--cyan-400);
}

/* ---------- 团队 ---------- */
.page-about .about-banner {
  margin: 0 0 clamp(20px, 3vw, 30px);
}

.page-about .about-banner img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  object-fit: cover;
}

.page-about .about-team {
  display: grid;
  gap: 16px;
  min-width: 0;
}

.page-about .about-team__card {
  min-width: 0;
  padding: clamp(18px, 2.4vw, 26px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(13, 44, 66, 0.7);
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease);
}

.page-about .about-team__card:hover {
  transform: translateY(-4px);
  border-color: rgba(55, 224, 216, 0.6);
}

.page-about .about-team__count {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  line-height: 1;
  color: var(--gold-400);
}

.page-about .about-team__unit {
  margin-left: 6px;
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.14em;
  color: var(--text-secondary);
}

.page-about .about-team__name {
  margin: 12px 0 10px;
  font-family: var(--font-heading);
  font-size: 19px;
  font-weight: 700;
  color: var(--text-primary);
}

.page-about .about-team__list {
  margin: 0;
  padding-left: 1.1em;
  display: grid;
  gap: 7px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text-secondary);
}

.page-about .about-team__list li::marker {
  color: var(--cyan-400);
}

/* ---------- 服务覆盖 ---------- */
.page-about .about-map {
  margin: 0 0 clamp(18px, 2.6vw, 28px);
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--ink-950);
}

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

.page-about .about-map figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--about-line-soft);
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-secondary);
}

.page-about .about-coverage__facts {
  margin-top: clamp(20px, 3vw, 30px);
  display: grid;
  gap: 16px;
}

.page-about .about-fact {
  padding-left: 14px;
  border-left: 2px solid var(--cyan-400);
}

.page-about .about-fact:nth-child(2) {
  border-left-color: var(--gold-400);
}

.page-about .about-fact:nth-child(3) {
  border-left-color: var(--mint-500);
}

.page-about .about-fact__value {
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
}

.page-about .about-fact__label {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--text-secondary);
}

/* ---------- 做事方式 ---------- */
.page-about .about-method {
  list-style: none;
  margin: clamp(16px, 2.4vw, 26px) 0 0;
  padding: 0;
  display: grid;
}

.page-about .about-method li {
  display: grid;
  gap: 8px;
  padding: clamp(16px, 2.2vw, 24px) 0;
  border-top: 1px solid var(--about-line-soft);
}

.page-about .about-method li:first-child {
  border-top: 1px solid var(--line);
}

.page-about .about-method__num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 700;
  line-height: 1;
  color: rgba(242, 196, 107, 0.85);
}

.page-about .about-method__title {
  margin: 0 0 6px;
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
}

.page-about .about-method__text {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-secondary);
}

.page-about .about-method__text a {
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(55, 224, 216, 0.4);
}

.page-about .about-method__text a:hover {
  border-bottom-color: var(--cyan-400);
}

/* ---------- 备案与联系 ---------- */
.page-about .about-sec--last {
  border-top: 0;
  padding-top: clamp(28px, 4vw, 46px);
}

.page-about .about-legal {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
  padding: clamp(20px, 3vw, 38px);
  border-radius: var(--radius-lg);
  background: var(--surface-soft);
  color: var(--ink-950);
}

.page-about .about-legal h2 {
  margin: 0 0 clamp(14px, 2vw, 20px);
  font-family: var(--font-heading);
  font-size: clamp(20px, 2.6vw, 28px);
  line-height: 1.3;
  color: var(--ink-950);
}

.page-about .about-legal .about-sec__num {
  margin: 0 0 10px;
  color: var(--ink-700);
}

.page-about .about-legal__list {
  margin: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-legal__row {
  display: grid;
  gap: 2px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(5, 19, 31, 0.14);
}

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

.page-about .about-legal__row dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--ink-700);
}

.page-about .about-legal__row dd {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--ink-950);
}

.page-about .about-legal__lead {
  margin: 0 0 clamp(14px, 2vw, 20px);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-700);
}

.page-about .about-legal__channels {
  list-style: none;
  margin: 0 0 clamp(18px, 2.4vw, 24px);
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-legal__channels li {
  display: grid;
  gap: 2px;
  font-size: 14.5px;
}

.page-about .about-legal__channels span {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--ink-700);
}

.page-about .about-legal__channels strong {
  font-weight: 700;
  color: var(--ink-950);
  word-break: break-word;
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-coverage__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

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

@media (min-width: 780px) {
  .page-about .about-team {
    grid-template-columns: 1fr 1.12fr 0.94fr;
    align-items: start;
  }

  .page-about .about-team__card:nth-child(2) {
    margin-top: -26px;
  }

  .page-about .about-method li {
    grid-template-columns: 72px minmax(0, 1fr);
    gap: 22px;
    align-items: start;
  }

  .page-about .about-legal {
    grid-template-columns: 1.05fr 1fr;
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
  }
}

@media (min-width: 1080px) {
  .page-about .about-body {
    grid-template-columns: 190px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: 104px;
  }

  .page-about .about-index__title {
    padding-left: 14px;
  }

  .page-about .about-index__list {
    display: grid;
    gap: 2px;
  }

  .page-about .about-index__list a {
    padding: 9px 0 9px 14px;
    border: 0;
    border-left: 1px solid var(--about-line-soft);
    border-radius: 0;
  }

  .page-about .about-index__list a:hover,
  .page-about .about-index__list a:focus-visible {
    border-left-color: var(--cyan-400);
    background: linear-gradient(90deg, rgba(55, 224, 216, 0.14), transparent 85%);
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-stage__panel,
  .page-about .about-team__card,
  .page-about .about-index__list a {
    transition: none;
  }

  .page-about .about-stage:hover .about-stage__panel,
  .page-about .about-team__card:hover {
    transform: none;
  }
}
<<<END>>>