.page-about {
  --ab-panel-line: #26334D;
  padding-bottom: 72px;
  overflow-x: hidden;
}

.page-about .ab-crumbs {
  padding: 20px 0 0;
  font-size: 13px;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  padding: 24px 0 50px;
  border-bottom: 1px solid var(--line);
  overflow: hidden;
  background: radial-gradient(120% 100% at 86% 0%, rgba(34, 211, 238, .08) 0%, transparent 58%);
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  inset: -1px;
  background-image:
    linear-gradient(to right, var(--line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: .3;
  -webkit-mask-image: radial-gradient(125% 95% at 10% 0%, #000 0%, transparent 72%);
  mask-image: radial-gradient(125% 95% at 10% 0%, #000 0%, transparent 72%);
  pointer-events: none;
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  top: -32%;
  right: -16%;
  width: 46%;
  height: 170%;
  background: linear-gradient(108deg, transparent 0%, var(--accent-soft) 44%, transparent 78%);
  transform: rotate(10deg);
  pointer-events: none;
}

.page-about .ab-hero-grid {
  position: relative;
  display: grid;
  gap: 34px;
}

.page-about .ab-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--steel);
}

.page-about .ab-kicker-mark {
  width: 28px;
  height: 2px;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
}

.page-about .ab-hero h1 {
  margin: 0;
  font-family: var(--display);
  font-weight: 900;
  font-size: clamp(30px, 7.4vw, 56px);
  line-height: 1.14;
  letter-spacing: -.01em;
  color: var(--paper-white);
}

.page-about .ab-lede {
  margin: 20px 0 0;
  max-width: 44em;
  font-size: 16px;
  line-height: 1.85;
  color: #C6CEDB;
}

.page-about .ab-stats {
  list-style: none;
  margin: 0;
  padding: 1px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .ab-stats li {
  background: var(--panel-deep);
  padding: 16px 14px;
}

.page-about .ab-stat-num {
  display: block;
  font-family: var(--mono);
  font-size: 30px;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--amber);
}

.page-about .ab-stat-label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  color: var(--steel);
}

.page-about .ab-hero-aside-note {
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--steel);
}

/* ---------- 通用两栏骨架 ---------- */
.page-about .ab-grid {
  display: grid;
  gap: 32px;
}

.page-about .ab-section-lede {
  margin: 12px 0 0;
  max-width: 46em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--steel);
}

.page-about .ab-intro {
  margin: 18px 0 0;
  max-width: 44em;
  font-size: 16px;
  line-height: 1.85;
  color: #C6CEDB;
}

/* ---------- A-01 时间轴 ---------- */
.page-about .ab-timeline {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
}

.page-about .ab-tl-item {
  position: relative;
  padding: 0 0 30px 38px;
}

.page-about .ab-tl-item::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 18px;
  bottom: 0;
  width: 1px;
  background: var(--line);
}

.page-about .ab-tl-item:last-child {
  padding-bottom: 4px;
}

.page-about .ab-tl-item:last-child::before {
  display: none;
}

.page-about .ab-tl-item::after {
  content: "";
  position: absolute;
  left: 1px;
  top: 8px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--sky-deep);
  border: 2px solid var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}

.page-about .ab-tl-year {
  display: block;
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--accent);
}

.page-about .ab-tl-item h3 {
  margin: 7px 0 8px;
  font-family: var(--display);
  font-weight: 700;
  font-size: 19px;
  color: var(--paper-white);
}

.page-about .ab-tl-item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: #A9B5C6;
}

.page-about .ab-quote {
  padding: 22px 20px;
}

.page-about .ab-quote-text {
  margin: 0;
  font-family: var(--serif);
  font-weight: 600;
  font-size: 15px;
  line-height: 1.95;
  color: var(--paper-white);
}

/* ---------- 图版通用 ---------- */
.page-about .ab-figure {
  margin: 0;
  position: relative;
  border: 1px solid var(--line);
  background: var(--panel-deep);
  overflow: hidden;
}

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

.page-about .ab-figure--3x2 img { aspect-ratio: 3 / 2; }
.page-about .ab-figure--3x4 img { aspect-ratio: 3 / 4; }

.page-about .ab-cap {
  margin: 0;
  padding: 12px 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--steel);
  border-top: 1px solid var(--line);
  background: var(--panel-deep);
}

/* ---------- A-02 编辑部 ---------- */
.page-about .ab-team-grid {
  display: grid;
  gap: 28px;
  margin-top: 30px;
}

.page-about .ab-roster {
  display: grid;
  gap: 12px;
}

.page-about .ab-roster-group {
  padding: 18px 16px 16px;
  border: 1px solid var(--line);
  border-top-width: 3px;
  background: var(--panel-deep);
}

.page-about .ab-roster-group--top { border-top-color: var(--cyan); }
.page-about .ab-roster-group--elite { border-top-color: var(--amber); }
.page-about .ab-roster-group--city { border-top-color: var(--stand-red); }

.page-about .ab-roster-group h3 {
  margin: 0;
  font-family: var(--display);
  font-weight: 700;
  font-size: 17px;
  color: var(--paper-white);
}

.page-about .ab-roster-count {
  margin: 6px 0 10px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--steel);
}

.page-about .ab-roster-group p:last-child {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: #A9B5C6;
}

.page-about .ab-team-note {
  margin-top: 22px;
  padding: 20px;
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
}

.page-about .ab-team-note h3 {
  margin: 0 0 8px;
  font-family: var(--display);
  font-weight: 700;
  font-size: 17px;
  color: var(--paper-white);
}

.page-about .ab-team-note p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: #C0CAD8;
}

/* ---------- A-03 五步流程 ---------- */
.page-about .ab-flow-grid {
  display: grid;
  gap: 32px;
  margin-top: 30px;
}

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

.page-about .ab-step {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 16px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
}

.page-about .ab-step:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .ab-step-num {
  padding-top: 4px;
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--amber);
}

.page-about .ab-step-body h3 {
  margin: 0 0 6px;
  font-family: var(--display);
  font-weight: 700;
  font-size: 18px;
  color: var(--paper-white);
}

.page-about .ab-step-body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: #A9B5C6;
}

.page-about .ab-flow-tail {
  margin: 26px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--steel);
}

.page-about .ab-flow-tail a,
.page-about .ab-gen-tail a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.page-about .ab-flow-tail a:hover,
.page-about .ab-gen-tail a:hover,
.page-about .ab-crumbs a:hover {
  color: var(--paper-white);
}

/* ---------- A-04 互校网络 ---------- */
.page-about .ab-coop-panel {
  display: grid;
  margin-top: 30px;
  border: 1px solid var(--line);
  background: linear-gradient(170deg, var(--panel) 0%, var(--panel-deep) 100%);
}

.page-about .ab-coop-copy {
  padding: 26px 22px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.page-about .ab-coop-lede {
  margin: 0;
  font-family: var(--serif);
  font-weight: 600;
  font-size: 17px;
  line-height: 1.8;
  color: var(--paper-white);
}

.page-about .ab-coop-copy p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: #A9B5C6;
}

.page-about .ab-coop-list {
  list-style: none;
  margin: 4px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.page-about .ab-coop-list li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  color: var(--steel);
}

.page-about .ab-coop-list li .mono {
  font-family: var(--mono);
  font-size: 20px;
  color: var(--amber);
}

.page-about .ab-coop-panel .ab-figure {
  border: 0;
  border-top: 1px solid var(--line);
  background: transparent;
}

.page-about .ab-coop-media img {
  aspect-ratio: 16 / 9;
}

/* ---------- A-05 四代结构 ---------- */
.page-about .ab-gen-list {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .ab-gen-item {
  display: grid;
  gap: 8px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .ab-gen-item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: #A9B5C6;
}

.page-about .ab-gen-ver {
  display: block;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--steel);
}

.page-about .ab-gen-meta h3 {
  margin: 7px 0 0;
  font-family: var(--display);
  font-weight: 700;
  font-size: 19px;
  color: var(--paper-white);
}

.page-about .ab-gen-item--current {
  position: relative;
  background: linear-gradient(90deg, var(--accent-soft), transparent 66%);
}

.page-about .ab-gen-item--current::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--accent);
}

.page-about .ab-gen-item--current h3 {
  color: var(--accent);
}

.page-about .ab-gen-tail {
  margin: 26px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--steel);
}

/* ---------- A-06 收尾与联系 ---------- */
.page-about .ab-closing-grid {
  display: grid;
  gap: 30px;
}

.page-about .ab-closing-copy .eyebrow {
  margin: 0;
}

.page-about .ab-closing-copy h2 {
  margin: 12px 0 0;
  font-family: var(--display);
  font-weight: 900;
  font-size: clamp(24px, 4.6vw, 34px);
  line-height: 1.26;
  color: var(--paper-white);
}

.page-about .ab-closing-copy p {
  margin: 14px 0 0;
  max-width: 42em;
  font-size: 15px;
  line-height: 1.85;
  color: #A9B5C6;
}

.page-about .ab-closing-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .ab-contact-card {
  position: relative;
  padding: 24px 22px;
  border: 1px solid var(--line);
  background: var(--panel-deep);
}

.page-about .ab-contact-card::after {
  content: "";
  position: absolute;
  top: -1px;
  right: -1px;
  width: 10px;
  height: 10px;
  background: var(--accent);
}

.page-about .ab-contact-card h3 {
  margin: 0 0 18px;
  font-family: var(--display);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: .04em;
  color: var(--paper-white);
}

.page-about .ab-contact-card dl {
  margin: 0;
  display: grid;
  gap: 16px;
}

.page-about .ab-contact-card dt {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--steel);
}

.page-about .ab-contact-card dd {
  margin: 5px 0 0;
  font-size: 15px;
  line-height: 1.65;
  color: var(--paper-white);
  word-break: break-word;
}

.page-about .ab-contact-card dd.ab-mono {
  font-family: var(--mono);
  letter-spacing: .04em;
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .ab-roster {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 880px) {
  .page-about .ab-hero {
    padding: 40px 0 74px;
  }

  .page-about .ab-hero-grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, .92fr);
    gap: 56px;
    align-items: end;
  }

  .page-about .ab-team-grid {
    grid-template-columns: minmax(0, .95fr) minmax(0, 1.15fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .ab-flow-grid {
    grid-template-columns: minmax(0, 1fr) 290px;
    gap: 48px;
    align-items: start;
  }

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

  .page-about .ab-coop-copy {
    padding: 36px 34px;
  }

  .page-about .ab-coop-panel .ab-figure {
    border-top: 0;
    border-left: 1px solid var(--line);
  }

  .page-about .ab-closing-grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    gap: 52px;
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-about .ab-grid {
    grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .ab-gen-item {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 10px 36px;
    align-items: baseline;
  }

  .page-about .ab-gen-item--current {
    padding-left: 20px;
  }
}
<<<END>>>