.page-about {
  --ab-cut: 14px;
  --ab-gap: clamp(14px, 2vw, 24px);
  --ab-sec: clamp(48px, 7vw, 96px);
  background: var(--ink);
  color: var(--mist);
  overflow-x: clip;
}

/* ---------- 首屏档案框 ---------- */
.page-about .ab-hero {
  position: relative;
  padding: clamp(18px, 2.6vw, 32px) 0 clamp(40px, 6vw, 76px);
  background:
    radial-gradient(120% 80% at 85% -10%, rgba(200, 255, 77, 0.1), transparent 60%),
    radial-gradient(90% 60% at 0% 0%, rgba(91, 200, 176, 0.06), transparent 55%),
    var(--ink);
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(143, 166, 155, 0.07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(143, 166, 155, 0.07) 1px, transparent 1px);
  background-size: 72px 72px;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 72%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 72%);
}

.page-about .ab-hero > .container {
  position: relative;
  z-index: 1;
}

.page-about .ab-hero__frame {
  position: relative;
  margin-top: clamp(14px, 2vw, 22px);
  padding: clamp(18px, 3vw, 40px);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(23, 59, 50, 0.62), rgba(10, 31, 22, 0.88));
}

.page-about .ab-hero__frame::before {
  content: "";
  position: absolute;
  inset: -1px;
  pointer-events: none;
  background:
    linear-gradient(var(--lime), var(--lime)) 0 0 / 20px 2px no-repeat,
    linear-gradient(var(--lime), var(--lime)) 0 0 / 2px 20px no-repeat,
    linear-gradient(var(--lime), var(--lime)) 100% 100% / 20px 2px no-repeat,
    linear-gradient(var(--lime), var(--lime)) 100% 100% / 2px 20px no-repeat;
  opacity: 0.85;
}

.page-about .ab-hero__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-about .ab-hero__stamp {
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--lime);
  border: 1px solid var(--line-strong);
  padding: 4px 9px;
  border-radius: 2px;
  white-space: nowrap;
}

.page-about .ab-hero__body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 40px);
}

.page-about .ab-hero__title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(34px, 5.4vw, 68px);
  line-height: 1.05;
  letter-spacing: -0.01em;
  margin: 0 0 18px;
  color: var(--mist);
}

.page-about .ab-hero__lede {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.5vw, 18px);
  line-height: 1.8;
  color: var(--sage);
}

.page-about .ab-hero__aside {
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.page-about .ab-hero__kicker {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--sage);
}

.page-about .ab-hero__big {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(64px, 9vw, 132px);
  line-height: 0.9;
  letter-spacing: -0.03em;
  color: var(--lime);
}

.page-about .ab-hero__big span {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.24em;
  margin-left: 8px;
  color: var(--sage);
  letter-spacing: 0;
}

.page-about .ab-hero__aside-note {
  margin: 12px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--sage);
  max-width: 30ch;
}

.page-about .ab-hero__stats {
  list-style: none;
  margin: clamp(24px, 3.4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .ab-hero__stats > li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 12px;
  background: rgba(10, 31, 22, 0.7);
}

.page-about .ab-hero__statnum {
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 700;
  color: var(--mist);
  letter-spacing: -0.01em;
  line-height: 1.1;
}

.page-about .ab-hero__statlbl {
  font-size: 12.5px;
  color: var(--sage);
  line-height: 1.5;
}

.page-about .ab-index {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: clamp(16px, 2.2vw, 26px);
}

.page-about .ab-index__link {
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--sage);
  text-decoration: none;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 2px;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-about .ab-index__link:hover,
.page-about .ab-index__link:focus-visible {
  color: var(--ink);
  background: var(--lime);
  border-color: var(--lime);
  outline: none;
}

.page-about .ab-hero__media {
  margin: clamp(20px, 3vw, 32px) 0 0;
}

/* ---------- 通用区段 ---------- */
.page-about .ab-section {
  padding: var(--ab-sec) 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: 76px;
}

.page-about .section__head {
  max-width: 78ch;
}

.page-about .ab-h2 {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(26px, 3.4vw, 40px);
  line-height: 1.12;
  letter-spacing: -0.005em;
  margin: 10px 0 0;
  color: var(--mist);
}

.page-about .ab-lead {
  margin: 14px 0 0;
  max-width: 66ch;
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.82;
  color: var(--sage);
}

/* ---------- 业务线 ---------- */
.page-about .ab-lines__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(228px, 1fr));
  gap: var(--ab-gap);
  margin-top: clamp(26px, 3.6vw, 44px);
}

.page-about .ab-line {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 20px 20px;
  border-top: 2px solid var(--graphite);
  transition: border-color 0.24s var(--ease), transform 0.24s var(--ease);
}

.page-about .ab-line:hover {
  border-top-color: var(--lime);
  transform: translateY(-3px);
}

.page-about .ab-line__num {
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--sage);
}

.page-about .ab-line__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 24px;
  letter-spacing: 0.01em;
  color: var(--mist);
}

.page-about .ab-line p {
  flex: 1;
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--sage);
}

.page-about .ab-line__link {
  align-self: flex-start;
  margin-top: 6px;
  font-size: 13.5px;
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s var(--ease);
}

.page-about .ab-line__link:hover,
.page-about .ab-line__link:focus-visible {
  border-bottom-color: var(--teal);
  outline: none;
}

/* ---------- 版本刻度 ---------- */
.page-about .ab-versions {
  background: linear-gradient(180deg, var(--ink), var(--ink-deep));
}

.page-about .ab-versions__list {
  list-style: none;
  margin: clamp(26px, 3.6vw, 44px) 0 0;
  padding: 0;
  border-left: 1px solid var(--line);
}

.page-about .ab-ver {
  position: relative;
  padding-left: clamp(18px, 2.6vw, 34px);
  border-bottom: 1px solid var(--line);
}

.page-about .ab-ver::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 26px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ink);
  border: 1px solid var(--graphite);
  transition: background 0.22s var(--ease), border-color 0.22s var(--ease), box-shadow 0.22s var(--ease);
}

.page-about .ab-ver:first-child::before {
  background: var(--lime);
  border-color: var(--lime);
  box-shadow: 0 0 0 4px rgba(200, 255, 77, 0.12);
}

.page-about .ab-ver__box[open] ~ * ,
.page-about .ab-ver:hover::before {
  border-color: var(--lime-dim);
}

.page-about .ab-ver__sum {
  display: flex;
  align-items: center;
  gap: clamp(12px, 1.8vw, 20px);
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
}

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

.page-about .ab-ver__sum::marker {
  content: "";
}

.page-about .ab-ver__num {
  min-width: 3.4em;
  font-size: clamp(15px, 1.6vw, 19px);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--sage);
  transition: color 0.22s var(--ease);
}

.page-about .ab-ver__stage {
  flex: 1;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(18px, 2vw, 24px);
  color: var(--mist);
}

.page-about .ab-ver__chev {
  flex: none;
  width: 10px;
  height: 10px;
  border-right: 1.6px solid var(--sage);
  border-bottom: 1.6px solid var(--sage);
  transform: rotate(45deg);
  transition: transform 0.22s var(--ease), border-color 0.22s var(--ease);
}

.page-about .ab-ver__box[open] .ab-ver__chev {
  transform: rotate(-135deg);
  border-color: var(--lime);
}

.page-about .ab-ver__box[open] .ab-ver__num {
  color: var(--lime);
}

.page-about .ab-ver__body {
  max-width: 68ch;
  padding: 0 0 20px;
  animation: abFade 0.24s var(--ease);
}

.page-about .ab-ver__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--sage);
}

@keyframes abFade {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 团队 ---------- */
.page-about .ab-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(18px, 3vw, 32px);
  margin-top: clamp(26px, 3.6vw, 44px);
}

.page-about .ab-team__media {
  margin: 0;
}

.page-about .ab-roles {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .ab-role {
  background: var(--ink);
  padding: clamp(16px, 2.2vw, 24px);
  transition: background 0.2s var(--ease);
}

.page-about .ab-role:hover {
  background: rgba(23, 59, 50, 0.72);
}

.page-about .ab-role__idx {
  display: inline-block;
  margin-bottom: 8px;
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--teal);
}

.page-about .ab-role__title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(20px, 2.2vw, 26px);
  color: var(--mist);
}

.page-about .ab-role__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--sage);
}

/* ---------- 流程 ---------- */
.page-about .ab-steps {
  list-style: none;
  margin: clamp(26px, 3.6vw, 44px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--ab-gap);
}

.page-about .ab-step {
  padding: clamp(20px, 2.6vw, 28px);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(23, 59, 50, 0.55), rgba(10, 31, 22, 0.78));
  clip-path: polygon(0 0, calc(100% - var(--ab-cut)) 0, 100% var(--ab-cut), 100% 100%, 0 100%);
}

.page-about .ab-step__i {
  display: block;
  margin-bottom: 12px;
  font-size: 11.5px;
  letter-spacing: 0.18em;
  color: var(--lime);
}

.page-about .ab-step__title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(19px, 2vw, 24px);
  color: var(--mist);
}

.page-about .ab-step__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--sage);
}

.page-about .ab-step__note {
  margin: 16px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--graphite);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--amber);
}

/* ---------- 合作与覆盖 ---------- */
.page-about .ab-eco__top {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 40px);
}

.page-about .ab-eco__media {
  margin: 0;
}

.page-about .ab-legend {
  list-style: none;
  margin: clamp(20px, 2.6vw, 30px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .ab-legend__item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: rgba(10, 31, 22, 0.62);
  transition: background 0.2s var(--ease);
}

.page-about .ab-legend__item:hover {
  background: rgba(23, 59, 50, 0.88);
}

.page-about .ab-legend__key {
  flex: none;
  width: 10px;
  height: 10px;
  border-radius: 1px;
}

.page-about .ab-legend__item--data .ab-legend__key {
  background: var(--lime);
}

.page-about .ab-legend__item--media .ab-legend__key {
  background: var(--amber);
}

.page-about .ab-legend__label {
  flex: 1;
  font-size: 14.5px;
  color: var(--mist);
}

.page-about .ab-legend__val {
  font-size: 15px;
  font-weight: 700;
  color: var(--lime);
}

.page-about .ab-legend__item--media .ab-legend__val {
  color: var(--amber);
}

.page-about .ab-coverage {
  list-style: none;
  margin: clamp(26px, 3.6vw, 44px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .ab-coverage__cell {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: clamp(16px, 2.2vw, 24px);
  background: var(--ink);
}

.page-about .ab-coverage__num {
  font-size: clamp(28px, 3.6vw, 42px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--lime);
}

.page-about .ab-coverage__lbl {
  font-size: 13px;
  line-height: 1.6;
  color: var(--sage);
}

/* ---------- 访问路径 ---------- */
.page-about .ab-paths__panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.6vw, 48px);
  padding: clamp(24px, 3.6vw, 48px);
  border: 1px solid var(--line);
  background:
    linear-gradient(120deg, rgba(23, 59, 50, 0.85), rgba(10, 31, 22, 0.92)),
    var(--ink);
  clip-path: polygon(0 0, calc(100% - var(--ab-cut)) 0, 100% var(--ab-cut), 100% 100%, 0 100%);
}

.page-about .ab-paths__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 2.6vw, 28px);
}

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

.page-about .ab-path {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr);
  column-gap: 14px;
  padding: clamp(16px, 2.2vw, 22px);
  background: rgba(10, 31, 22, 0.76);
  transition: background 0.2s var(--ease);
}

.page-about .ab-path:hover {
  background: rgba(23, 59, 50, 0.92);
}

.page-about .ab-path__num {
  grid-column: 1;
  grid-row: 1 / span 2;
  padding-top: 3px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--lime);
}

.page-about .ab-path__title {
  grid-column: 2;
  grid-row: 1;
  margin: 0 0 4px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 19px;
  color: var(--mist);
}

.page-about .ab-path p {
  grid-column: 2;
  grid-row: 2;
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--sage);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .ab-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .ab-hero__stats > li {
    padding: 16px 14px;
  }
}

@media (min-width: 780px) {
  .page-about .ab-coverage {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 820px) {
  .page-about .ab-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-about .ab-hero__body {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 0.85fr);
    align-items: end;
  }

  .page-about .ab-hero__aside {
    padding-top: 0;
    border-top: 0;
    border-left: 1px solid var(--line);
    padding-left: clamp(16px, 2vw, 28px);
  }
}

@media (min-width: 900px) {
  .page-about .ab-team__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }

  .page-about .ab-eco__top {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: center;
  }
}

@media (min-width: 940px) {
  .page-about .ab-paths__panel {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
    align-items: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}
<<<END>>>