.page-about {
  --about-rail-w: 236px;
  --about-gap: clamp(24px, 4vw, 56px);
  --about-soft-shadow: 0 32px 64px -44px rgba(0, 0, 0, .95);
  display: block;
  background: var(--ink-900);
  color: var(--ice);
  overflow-x: clip;
}

/* ---------- 首屏封面 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(24px, 4.4vw, 56px) 0 clamp(32px, 5vw, 64px);
  background:
    radial-gradient(120% 90% at 8% -10%, rgba(184, 255, 61, .13), transparent 58%),
    radial-gradient(90% 80% at 100% 10%, rgba(255, 138, 43, .08), transparent 60%),
    linear-gradient(180deg, var(--ink-800) 0%, var(--ink-900) 88%);
  border-bottom: 1px solid var(--line-soft);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(90deg, rgba(30, 53, 84, .55) 0 1px, transparent 1px 96px);
  opacity: .5;
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.6vw, 48px);
  align-items: center;
}

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

.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 12.5px;
  color: var(--mist);
}

.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--line);
}

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

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--lime);
  border-bottom-color: var(--lime);
  outline: none;
}

.page-about .about-hero__eyebrow {
  margin: 20px 0 12px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-about .about-hero h1 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 6vw, 60px);
  line-height: 1.08;
  letter-spacing: -.025em;
  color: var(--ice);
  text-wrap: balance;
}

.page-about .about-hero__lead {
  max-width: 60ch;
  margin: 0 0 16px;
  font-size: clamp(15.5px, 1.5vw, 18px);
  line-height: 1.72;
  color: var(--ice-dim);
}

.page-about .about-hero__note {
  margin: 0 0 24px;
  padding-left: 14px;
  border-left: 2px solid var(--lime-28);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist);
}

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

.page-about .about-hero__media {
  position: relative;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  background: var(--ink-700);
  box-shadow: var(--about-soft-shadow);
  overflow: hidden;
}

.page-about .about-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(285deg, rgba(184, 255, 61, .18), transparent 58%);
  pointer-events: none;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .media-caption {
  display: block;
  margin: 0;
  padding: 12px 16px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--mist);
  background: rgba(5, 13, 26, .55);
  border-top: 1px solid var(--line-soft);
}

/* ---------- 首屏数字带 ---------- */
.page-about .about-figures {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(28px, 4vw, 44px) 0 0;
  background: var(--line-soft);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.page-about .about-figure {
  min-width: 0;
  padding: 16px 18px 18px;
  background: linear-gradient(160deg, var(--ink-700), var(--ink-800));
}

.page-about .about-figure__label {
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--mist);
}

.page-about .about-figure__value {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(24px, 3.4vw, 36px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: .01em;
  color: var(--orange);
}

.page-about .about-figure__unit {
  margin-left: 2px;
  font-size: .55em;
  color: var(--ice-dim);
}

/* ---------- 主体：侧边索引 + 章节 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
  padding: clamp(36px, 5.4vw, 80px) var(--gutter);
}

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

.page-about .about-rail__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .18em;
  color: var(--mist);
}

.page-about .about-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-rail__list li {
  flex: 0 0 auto;
}

.page-about .about-rail__list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px 9px 12px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: rgba(11, 31, 58, .6);
  font-size: 13px;
  color: var(--ice-dim);
  text-decoration: none;
  white-space: nowrap;
  transition: border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}

.page-about .about-rail__num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--lime);
}

.page-about .about-rail__list a:hover,
.page-about .about-rail__list a:focus-visible {
  border-color: var(--lime);
  background: var(--lime-08);
  color: var(--ice);
  outline: none;
}

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

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

.page-about .about-section + .about-section {
  margin-top: clamp(40px, 6vw, 72px);
  padding-top: clamp(36px, 5vw, 64px);
  border-top: 1px dashed var(--line);
}

.page-about .about-section__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(12px, 2.2vw, 26px);
  align-items: start;
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-about .about-section__num {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(38px, 6.6vw, 72px);
  line-height: .84;
  letter-spacing: -.04em;
  color: var(--ink-750);
  -webkit-text-stroke: 1.5px var(--lime-28);
}

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

.page-about .about-section__intro h2 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3.2vw, 32px);
  line-height: 1.24;
  letter-spacing: -.015em;
  color: var(--ice);
}

.page-about .about-section__intro p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 01 能力 ---------- */
.page-about .about-capabilities {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .about-capability {
  min-width: 0;
  padding: clamp(18px, 2.6vw, 26px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(165deg, var(--ink-700), var(--ink-800) 78%);
  transition: border-color var(--t) var(--ease), transform var(--t) var(--ease);
}

.page-about .about-capability:hover {
  border-color: var(--lime-28);
  transform: translateY(-2px);
}

.page-about .about-capability--wide {
  background:
    radial-gradient(90% 120% at 100% 0%, rgba(184, 255, 61, .12), transparent 62%),
    linear-gradient(165deg, var(--ink-700), var(--ink-800) 78%);
}

.page-about .about-capability__tag {
  display: inline-block;
  margin: 0 0 12px;
  padding: 4px 12px;
  border: 1px solid var(--lime-28);
  border-radius: var(--r-pill);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--lime);
}

.page-about .about-capability h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(18px, 2.2vw, 22px);
  line-height: 1.3;
  color: var(--ice);
}

.page-about .about-capability p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--ice-dim);
}

.page-about .about-points {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-about .about-points li {
  position: relative;
  padding-left: 16px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--lime);
}

/* ---------- 02 时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  margin: 0;
  padding: 4px 0 0;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 12px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--lime-28), var(--line) 70%, transparent);
}

.page-about .about-stop {
  position: relative;
  padding: 0 0 clamp(18px, 2.6vw, 26px) 38px;
  min-width: 0;
}

.page-about .about-stop::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 7px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--ink-900);
  border: 2px solid var(--lime-soft);
  transition: background var(--t) var(--ease), box-shadow var(--t) var(--ease), border-color var(--t) var(--ease);
}

.page-about .about-stop:hover::before {
  background: var(--lime);
  border-color: var(--lime);
  box-shadow: 0 0 0 6px var(--lime-08);
}

.page-about .about-stop__year {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 14px;
  letter-spacing: .12em;
  color: var(--orange);
}

.page-about .about-stop__body {
  min-width: 0;
  padding: 12px 16px;
  border-left: 2px solid transparent;
  border-radius: var(--r-sm);
  transition: background var(--t) var(--ease), border-color var(--t) var(--ease);
}

.page-about .about-stop:hover .about-stop__body {
  background: rgba(11, 31, 58, .65);
  border-left-color: var(--lime-28);
}

.page-about .about-stop h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.35;
  color: var(--ice);
}

.page-about .about-stop p {
  margin: 0;
  max-width: 64ch;
  font-size: 14px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-shot {
  margin: clamp(22px, 3vw, 32px) 0 0;
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  background: var(--ink-700);
  overflow: hidden;
}

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

.page-about .about-shot--team {
  border-radius: var(--r-lg);
  margin: 0 0 16px;
}

/* ---------- 03 工序 ---------- */
.page-about .about-process {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 32px);
}

.page-about .about-steps {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-step {
  position: relative;
  min-width: 0;
  padding: 16px 18px 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: rgba(7, 20, 38, .78);
  transition: border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}

.page-about .about-step:hover {
  border-color: var(--lime-28);
  background: var(--ink-700);
}

.page-about .about-step__num {
  display: inline-block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--lime);
}

.page-about .about-step h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  color: var(--ice);
}

.page-about .about-step p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-process__aside {
  min-width: 0;
  padding: clamp(16px, 2.4vw, 24px);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-lg);
  background: linear-gradient(170deg, var(--teal), var(--ink-800) 72%);
}

.page-about .about-process__aside p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ice-dim);
}

/* ---------- 04 团队 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 0 0 clamp(22px, 3vw, 32px);
  padding: 0;
  list-style: none;
}

.page-about .about-team__card {
  min-width: 0;
  padding: 16px 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(160deg, var(--ink-750), var(--ink-800));
  transition: border-color var(--t) var(--ease), transform var(--t) var(--ease);
}

.page-about .about-team__card:hover {
  border-color: var(--lime-28);
  transform: translateY(-2px);
}

.page-about .about-team__card:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
}

.page-about .about-team__card--lead {
  grid-column: 1 / -1;
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(5, 13, 26, .22), transparent 60%),
    linear-gradient(150deg, var(--lime), var(--lime-soft));
  border-color: transparent;
  color: var(--ink-900);
}

.page-about .about-team__num {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(28px, 4.4vw, 40px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: .01em;
  color: var(--orange);
}

.page-about .about-team__card--lead .about-team__num {
  color: #08131f;
}

.page-about .about-team__label {
  display: block;
  margin-top: 8px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--ice);
}

.page-about .about-team__card--lead .about-team__label {
  color: #0a1a12;
}

.page-about .about-team__card p {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--mist);
}

.page-about .about-team__card--lead p {
  color: #14301a;
}

.page-about .about-coverage {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

.page-about .about-coverage__item {
  min-width: 0;
  padding-left: 16px;
  border-left: 2px solid var(--line);
  transition: border-color var(--t-fast) var(--ease);
}

.page-about .about-coverage__item:hover {
  border-left-color: var(--lime);
}

.page-about .about-coverage__item h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15.5px;
  color: var(--ice);
}

.page-about .about-coverage__item p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 05 资质 ---------- */
.page-about .about-creds {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .about-creds__group {
  min-width: 0;
  padding: clamp(16px, 2.4vw, 24px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: rgba(7, 20, 38, .72);
}

.page-about .about-creds__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--mist);
}

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

.page-about .about-tag {
  padding: 7px 14px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  font-size: 13px;
  line-height: 1.5;
  color: var(--ice-dim);
  background: var(--ink-800);
  transition: border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}

.page-about .about-tag--lime {
  border-color: var(--lime-28);
  color: var(--lime);
  background: var(--lime-08);
}

.page-about .about-tag--teal {
  border-color: rgba(125, 232, 75, .22);
  color: var(--teal-contrast, #9ff7c9);
  background: rgba(14, 59, 58, .55);
}

.page-about .about-tag--orange {
  border-color: rgba(255, 138, 43, .35);
  color: var(--orange);
  background: rgba(255, 138, 43, .08);
}

.page-about .about-tag:hover {
  border-color: var(--ice);
  color: var(--ice);
}

.page-about .about-creds__note {
  margin: 14px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 06 版本 ---------- */
.page-about .about-versions {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .about-version {
  position: relative;
  min-width: 0;
  padding: clamp(18px, 2.6vw, 26px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(165deg, var(--ink-700), var(--ink-800) 80%);
  overflow: hidden;
}

.page-about .about-version--current {
  border-color: var(--lime-28);
}

.page-about .about-version--current::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--lime), var(--orange));
}

.page-about .about-version__flag {
  display: inline-block;
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--lime);
}

.page-about .about-version__flag--alt {
  color: var(--mist);
}

.page-about .about-version h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(18px, 2.2vw, 21px);
  line-height: 1.32;
  color: var(--ice);
}

.page-about .about-version p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--ice-dim);
}

.page-about .about-link {
  display: inline-block;
  margin-top: 16px;
  padding-bottom: 3px;
  border-bottom: 1px solid var(--lime-28);
  font-size: 13.5px;
  font-weight: 600;
  color: var(--lime);
  text-decoration: none;
  transition: border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  border-bottom-color: var(--lime);
  color: var(--ice);
  outline: none;
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  padding: clamp(36px, 5.6vw, 72px) 0;
  border-top: 1px solid var(--line-soft);
  background:
    radial-gradient(80% 120% at 0% 0%, rgba(184, 255, 61, .1), transparent 60%),
    linear-gradient(180deg, var(--ink-800), var(--ink-900));
}

.page-about .about-cta__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  align-items: center;
}

.page-about .about-cta h2 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3.2vw, 30px);
  line-height: 1.28;
  color: var(--ice);
}

.page-about .about-cta p {
  margin: 0;
  max-width: 56ch;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--mist);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 600px) {
  .page-about .about-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (min-width: 820px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, .96fr);
    align-items: center;
  }

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

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

  .page-about .about-process {
    grid-template-columns: minmax(0, .94fr) minmax(0, 1.06fr);
    align-items: start;
  }

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

  .page-about .about-team__card--lead {
    grid-column: span 2;
  }

  .page-about .about-coverage {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }

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

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

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1.2fr) auto;
    justify-content: space-between;
  }

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

@media (min-width: 1024px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 20px);
    align-self: start;
  }

  .page-about .about-rail__list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
  }

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

  .page-about .about-rail__list a {
    display: flex;
    width: 100%;
    padding: 10px 12px;
    border-radius: var(--r-md);
    border-color: transparent;
    background: transparent;
    white-space: normal;
  }

  .page-about .about-rail__list a:hover,
  .page-about .about-rail__list a:focus-visible {
    border-color: var(--lime-28);
    background: var(--lime-08);
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-capability,
  .page-about .about-team__card,
  .page-about .about-step,
  .page-about .about-stop__body,
  .page-about .about-stop::before,
  .page-about .about-rail__list a,
  .page-about .about-tag {
    transition: none;
  }

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

.page-about {
  --teal-contrast: currentColor;
}