.page-about {
  --about-pad: clamp(44px, 6vw, 84px);
  color: var(--text);
  background: var(--void);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(24px, 4vw, 44px) 0 clamp(32px, 5vw, 64px);
}

.page-about .about-crumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-bottom: clamp(24px, 4vw, 44px);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--mist);
}

.page-about .about-crumb .breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

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

.page-about .about-crumb a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.12s var(--ease), border-color 0.12s var(--ease);
}

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

.page-about .about-crumb [aria-current="page"] {
  color: var(--star);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-about .eyebrow {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0 0 14px;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.3rem, 8vw, 5rem);
  line-height: 1.06;
  letter-spacing: -0.03em;
  color: var(--star);
  margin: 0 0 20px;
}

.page-about .about-hero__intro {
  max-width: 60ch;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text);
  margin: 0 0 26px;
}

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

/* ---------- 目录 ---------- */
.page-about .about-toc {
  border-left: 1px solid var(--line);
  padding-left: 18px;
}

.page-about .about-toc__title {
  margin: 0 0 12px;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--mist);
}

.page-about .about-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 16px;
}

.page-about .about-toc__list a {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 9px 0;
  font-size: 0.9rem;
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: color 0.12s var(--ease), transform 0.12s var(--ease);
}

.page-about .about-toc__list a .mono {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--violet);
}

.page-about .about-toc__list a:hover,
.page-about .about-toc__list a:focus-visible {
  color: var(--star);
  transform: translateX(3px);
}

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

/* ---------- 通用节段 ---------- */
.page-about .about-section {
  padding: var(--about-pad) 0;
  border-top: 1px solid var(--line);
}

.page-about .about-head {
  display: grid;
  gap: 14px;
  margin-bottom: clamp(26px, 4vw, 44px);
  max-width: 780px;
}

.page-about .about-head h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.65rem, 5vw, 2.9rem);
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--star);
  margin: 0;
}

.page-about .about-head__lead {
  margin: 0;
  font-size: 0.98rem;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-body {
  max-width: 68ch;
  font-size: 0.98rem;
  line-height: 1.9;
  color: var(--text);
  margin: 0 0 16px;
}

.page-about .about-body--link {
  margin-top: 26px;
  color: var(--mist);
}

.page-about .about-link {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 1px;
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--star);
}

/* ---------- 三条要点卡 ---------- */
.page-about .about-points {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-point {
  position: relative;
  padding: 22px 20px 24px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--panel) 0%, rgba(7, 11, 30, 0) 100%);
}

.page-about .about-point::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 34px;
  height: 1px;
  background: var(--cyan);
}

.page-about .about-point__no {
  margin: 0 0 12px;
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--violet);
}

.page-about .about-point__title {
  font-family: var(--font-display);
  font-size: 1.08rem;
  line-height: 1.4;
  color: var(--star);
  margin: 0 0 10px;
}

.page-about .about-point__text {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 0 0 clamp(26px, 4vw, 40px);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
}

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

.page-about .about-track::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 10px;
  bottom: 26px;
  width: 1px;
  background: linear-gradient(180deg, var(--violet) 0%, var(--cyan) 62%, rgba(42, 53, 95, 0) 100%);
}

.page-about .about-track__item {
  position: relative;
  padding-left: 38px;
  padding-bottom: 18px;
}

.page-about .about-track__item::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 24px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--void);
  border: 1px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(54, 224, 232, 0.09);
}

.page-about .about-track__item:nth-child(even)::before {
  border-color: var(--gold);
  box-shadow: 0 0 0 4px rgba(255, 200, 87, 0.09);
}

.page-about .about-phase {
  border: 1px solid var(--line);
  background: var(--panel);
}

.page-about .about-phase[open] {
  background: var(--panel-2);
}

.page-about .about-phase__summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-phase__summary:hover .about-phase__name,
.page-about .about-phase__summary:focus-visible .about-phase__name {
  color: var(--gold);
}

.page-about .about-phase__num {
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.page-about .about-phase__year {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--cyan);
}

.page-about .about-phase__name {
  font-family: var(--font-display);
  font-size: 1.02rem;
  line-height: 1.45;
  color: var(--star);
  margin: 0;
  flex: 1 1 180px;
  transition: color 0.12s var(--ease);
}

.page-about .about-phase__cue {
  position: relative;
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
  align-self: center;
  margin-left: auto;
}

.page-about .about-phase__cue::before,
.page-about .about-phase__cue::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: transform 0.16s var(--ease);
}

.page-about .about-phase__cue::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 1.5px;
}

.page-about .about-phase__cue::after {
  left: 6px;
  top: 0;
  width: 1.5px;
  height: 14px;
}

.page-about .about-phase[open] .about-phase__cue::after {
  transform: scaleY(0);
}

.page-about .about-phase__body {
  padding: 4px 18px 20px;
  border-top: 1px solid var(--line);
}

.page-about .about-phase__text {
  margin: 14px 0 0;
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--text);
  max-width: 66ch;
}

.page-about .about-chips {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0 0;
  padding: 0;
}

.page-about .about-chips li {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 5px 9px;
  color: var(--mist);
  border: 1px solid var(--line);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  margin-bottom: clamp(30px, 4vw, 46px);
}

.page-about .about-team__viz {
  border: 1px solid var(--line);
  padding: 24px 20px 22px;
  background: var(--panel);
}

.page-about .about-ratio__num {
  font-family: var(--font-mono);
  font-size: clamp(2.6rem, 9vw, 3.6rem);
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--star);
  margin: 0 0 8px;
}

.page-about .about-ratio__label {
  margin: 0 0 20px;
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about .about-ratio__bar {
  display: flex;
  height: 12px;
  gap: 3px;
  margin-bottom: 18px;
}

.page-about .about-ratio__seg--focus {
  flex: 12 1 0;
  background: linear-gradient(90deg, var(--cyan), var(--violet));
}

.page-about .about-ratio__seg--rest {
  flex: 33 1 0;
  background: var(--line);
}

.page-about .about-ratio__legend {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--mist);
}

.page-about .about-ratio__legend li {
  display: flex;
  align-items: center;
  gap: 9px;
}

.page-about .about-dot {
  width: 8px;
  height: 8px;
  flex: 0 0 auto;
}

.page-about .about-dot--cyan {
  background: var(--cyan);
}

.page-about .about-dot--violet {
  background: var(--line);
}

.page-about .about-checks__title {
  font-family: var(--font-display);
  font-size: 1.06rem;
  line-height: 1.45;
  color: var(--star);
  margin: 0 0 16px;
}

.page-about .about-checks {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .about-check {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
}

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

.page-about .about-check__no {
  font-size: 0.72rem;
  color: var(--violet);
  flex: 0 0 auto;
}

.page-about .about-check__name {
  font-size: 0.94rem;
  color: var(--star);
}

/* ---------- 覆盖 ---------- */
.page-about .about-metrics {
  list-style: none;
  margin: 0 0 clamp(28px, 4vw, 44px);
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-metric {
  background: var(--void);
  padding: 20px 16px 22px;
  display: grid;
  gap: 8px;
  transition: background 0.14s var(--ease);
}

.page-about .about-metric:hover {
  background: var(--panel);
}

.page-about .about-metric__value {
  font-family: var(--font-mono);
  font-size: clamp(1.55rem, 5.4vw, 2.3rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--star);
}

.page-about .about-metric:nth-child(2) .about-metric__value {
  color: var(--gold);
}

.page-about .about-metric__label {
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--mist);
}

.page-about .about-fields {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-about .about-fields__title {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--star);
  margin: 0 0 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

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

.page-about .about-industry {
  font-size: 0.82rem;
  padding: 7px 12px;
  color: var(--text);
  border: 1px solid var(--line);
  transition: border-color 0.12s var(--ease), color 0.12s var(--ease);
}

.page-about .about-industry:hover {
  border-color: var(--cyan);
  color: var(--star);
}

/* ---------- 节奏 ---------- */
.page-about .about-cadence {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-about .about-cadence .about-figure {
  margin: 0;
}

.page-about .about-cadence__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .about-cadence__item {
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

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

.page-about .about-cadence__label {
  display: inline-block;
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--gold);
  border: 1px solid rgba(255, 200, 87, 0.4);
  padding: 3px 8px;
  margin-bottom: 10px;
}

.page-about .about-cadence__title {
  font-family: var(--font-display);
  font-size: 1rem;
  line-height: 1.5;
  color: var(--star);
  margin: 0 0 8px;
}

.page-about .about-cadence__text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 长期服务 ---------- */
.page-about .about-section--last {
  padding-bottom: clamp(56px, 8vw, 104px);
}

.page-about .about-promise {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  border: 1px solid var(--line);
  background: linear-gradient(150deg, var(--panel-2) 0%, var(--void) 68%);
  padding: clamp(24px, 4vw, 44px);
}

.page-about .about-promise__num {
  font-family: var(--font-mono);
  font-size: clamp(2.8rem, 11vw, 4.6rem);
  line-height: 1;
  letter-spacing: -0.05em;
  color: var(--gold);
  margin: 0 0 10px;
}

.page-about .about-promise__num span {
  font-size: 0.5em;
  color: var(--star);
}

.page-about .about-promise__caption {
  margin: 0;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about .about-promise__body h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.5rem, 4.4vw, 2.3rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--star);
  margin: 0 0 16px;
}

.page-about .about-steps {
  list-style: none;
  margin: 20px 0 26px;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .about-step {
  display: flex;
  gap: 14px;
  align-items: baseline;
  padding: 11px 0;
  border-bottom: 1px dashed var(--line);
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--text);
}

.page-about .about-step .mono {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--cyan);
  flex: 0 0 auto;
}

/* ---------- 动效 ---------- */
@media (prefers-reduced-motion: no-preference) {
  .page-about [data-reveal] {
    transition: opacity 0.32s var(--ease), transform 0.32s var(--ease);
  }
}

.page-about [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition-duration: 0.001ms !important;
  }

  .page-about [data-reveal] {
    transform: none !important;
  }
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-about .about-points {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

  .page-about .about-toc__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 0.9fr);
    gap: 56px;
    align-items: end;
  }

  .page-about .about-toc__list {
    grid-template-columns: 1fr;
  }

  .page-about .about-track__item {
    padding-left: 52px;
    padding-bottom: 22px;
  }

  .page-about .about-track::before {
    left: 15px;
  }

  .page-about .about-track__item::before {
    left: 9px;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .about-cadence {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .about-cadence .about-figure {
    position: sticky;
    top: 24px;
  }

  .page-about .about-promise {
    grid-template-columns: minmax(0, 0.62fr) minmax(0, 1.38fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-hero__intro {
    font-size: 1.06rem;
  }

  .page-about .about-body {
    font-size: 1.02rem;
  }
}
<<<END>>>