.page-about {
  --ab-hair: rgba(176, 190, 197, 0.18);
  --ab-hair-strong: rgba(176, 190, 197, 0.34);
  --ab-ink-line: rgba(27, 42, 54, 0.12);
  background: var(--ink-900);
  color: var(--mist);
  overflow-x: hidden;
}

.page-about .wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 40px);
  box-sizing: border-box;
}

.page-about .ab-chapter,
.page-about .ab-hero {
  scroll-margin-top: 140px;
}

/* ---------- 首屏 ---------- */

.page-about .ab-hero {
  padding-block: clamp(20px, 4vw, 48px) clamp(36px, 5vw, 64px);
  position: relative;
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(0, 229, 196, 0.08) 0%, rgba(0, 229, 196, 0) 58%),
    var(--ink-900);
}

.page-about .breadcrumb {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--graphite);
  margin-bottom: clamp(24px, 4vw, 44px);
}

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

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--cyan);
  border-color: rgba(0, 229, 196, 0.5);
}

.page-about .ab-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
}

.page-about .ab-eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 clamp(16px, 2vw, 24px);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--graphite);
}

.page-about .ab-eyebrow__num {
  background: var(--cyan);
  color: var(--ink-950);
  font-weight: 700;
  padding: 3px 8px;
  line-height: 1.2;
}

.page-about .ab-hero__title {
  font-family: var(--font-display);
  font-size: clamp(32px, 6vw, 74px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin: 0 0 clamp(16px, 2vw, 26px);
  color: var(--mist);
}

.page-about .ab-hero__title-em {
  display: block;
  color: var(--cyan);
}

.page-about .ab-hero__lede {
  margin: 0;
  max-width: 64ch;
  font-size: clamp(15.5px, 1.5vw, 18px);
  line-height: 1.85;
  color: var(--silver);
}

.page-about .ab-hero__stats {
  display: grid;
  align-content: start;
  border-top: 1px solid var(--ab-hair-strong);
}

.page-about .ab-stat {
  display: grid;
  grid-template-columns: minmax(72px, auto) minmax(0, 1fr);
  align-items: baseline;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--ab-hair);
}

.page-about .ab-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 3.4vw, 40px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--cyan);
}

.page-about .ab-stat__label {
  font-size: 13px;
  line-height: 1.65;
  color: var(--graphite);
}

/* ---------- 章节目录 ---------- */

.page-about .ab-toc {
  display: flex;
  margin-top: clamp(32px, 4vw, 56px);
  border-top: 1px solid var(--ab-hair);
  border-bottom: 1px solid var(--ab-hair);
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-about .ab-toc::-webkit-scrollbar {
  display: none;
}

.page-about .ab-toc__link {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  padding: 15px 20px;
  font-size: 13px;
  color: var(--graphite);
  text-decoration: none;
  white-space: nowrap;
  border-right: 1px solid var(--ab-hair);
  transition: color 0.25s ease, background-color 0.25s ease;
}

.page-about .ab-toc__link:hover,
.page-about .ab-toc__link:focus-visible {
  color: var(--mist);
  background: rgba(0, 229, 196, 0.06);
}

.page-about .ab-toc__link[aria-current="true"] {
  color: var(--cyan);
  background: rgba(0, 229, 196, 0.08);
}

.page-about .ab-toc__idx {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--orange);
}

/* ---------- 章节通用 ---------- */

.page-about .ab-chapter {
  padding-block: clamp(48px, 7vw, 104px);
}

.page-about .ab-chapter--dark {
  background: var(--ink-900);
}

.page-about .ab-chapter--panel {
  background: var(--panel);
}

.page-about .ab-chapter--paper {
  background: var(--paper);
  color: var(--paper-ink);
}

.page-about .ab-head {
  max-width: 76ch;
  margin-bottom: clamp(32px, 4vw, 56px);
}

.page-about .ab-head__idx {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--orange);
}

.page-about .ab-head__title {
  font-family: var(--font-display);
  font-size: clamp(25px, 3.6vw, 46px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
  color: inherit;
}

.page-about .ab-head__lede {
  margin: 0;
  font-size: clamp(15px, 1.4vw, 16.5px);
  line-height: 1.85;
  color: var(--silver);
}

.page-about .ab-chapter--paper .ab-head__lede {
  color: #52606B;
}

.page-about .ab-note {
  margin: clamp(24px, 3vw, 36px) 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--cyan);
  font-size: 14px;
  line-height: 1.8;
  color: var(--graphite);
}

.page-about .ab-note--paper {
  color: #52606B;
  border-left-color: var(--grass);
}

.page-about .ab-note a,
.page-about .ab-team__hint a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 196, 0.42);
  transition: color 0.25s ease, border-color 0.25s ease;
}

.page-about .ab-note--paper a {
  color: #1B6B5A;
  border-bottom-color: rgba(27, 107, 90, 0.4);
}

.page-about .ab-note a:hover,
.page-about .ab-note a:focus-visible,
.page-about .ab-team__hint a:hover,
.page-about .ab-team__hint a:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

/* ---------- 图块 ---------- */

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

.page-about .ab-fig__frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--ab-hair-strong);
  background: var(--ink-950);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-about .ab-fig__frame img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  filter: grayscale(1) contrast(1.1);
  transition: filter 0.45s ease;
}

.page-about .ab-fig__frame:hover img,
.page-about .ab-fig__frame:focus-within img {
  filter: grayscale(0.3) contrast(1.04);
}

.page-about .ab-fig__cap {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.03em;
  line-height: 1.7;
  color: var(--graphite);
}

.page-about .ab-chapter--paper .ab-fig__frame {
  border-color: var(--ab-ink-line);
  background: #DDE5EA;
}

.page-about .ab-chapter--paper .ab-fig__cap {
  color: #52606B;
}

/* ---------- 章节一：链路 ---------- */

.page-about .ab-flow-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 48px);
}

.page-about .ab-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--ab-hair-strong);
}

.page-about .ab-flow__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 18px;
  padding: 22px 0;
  border-bottom: 1px solid var(--ab-hair);
  transition: background-color 0.3s ease;
}

.page-about .ab-flow__item:hover {
  background: rgba(0, 229, 196, 0.035);
}

.page-about .ab-flow__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  padding-top: 5px;
}

.page-about .ab-flow__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(17px, 1.8vw, 20px);
  letter-spacing: -0.01em;
  color: var(--mist);
}

.page-about .ab-flow__body p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--silver);
}

.page-about .ab-fig--flow .ab-fig__frame {
  clip-path: polygon(0 0, 100% 0, 100% 100%, 22px 100%, 0 calc(100% - 22px));
}

/* ---------- 章节二：时间线 ---------- */

.page-about .ab-tl {
  display: grid;
  gap: 0;
}

.page-about .ab-tl__node {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  padding-block: clamp(22px, 2.6vw, 32px);
  border-top: 1px solid var(--ab-ink-line);
}

.page-about .ab-tl__year {
  display: flex;
  align-items: baseline;
  gap: 8px;
  position: relative;
  padding-left: 20px;
}

.page-about .ab-tl__year::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.42em;
  width: 9px;
  height: 9px;
  background: var(--grass);
}

.page-about .ab-tl__year-num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--paper-ink);
}

.page-about .ab-tl__year-suf {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: #6B7A86;
}

.page-about .ab-tl__panel {
  border-left: 1px solid var(--ab-ink-line);
  padding-left: 18px;
}

.page-about .ab-tl__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  cursor: pointer;
  list-style: none;
  padding: 2px 0;
}

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

.page-about .ab-tl__head {
  font-family: var(--font-display);
  font-size: clamp(16px, 1.7vw, 20px);
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--paper-ink);
}

.page-about .ab-tl__mark {
  flex: 0 0 auto;
  width: 12px;
  height: 12px;
  border: 1px solid var(--grass);
  background: transparent;
  transition: background-color 0.28s ease, transform 0.28s ease;
}

.page-about .ab-tl__panel[open] .ab-tl__mark {
  background: var(--grass);
}

.page-about .ab-tl__summary:hover .ab-tl__mark {
  transform: scale(1.18);
}

.page-about .ab-tl__body {
  padding: 14px 0 2px;
  font-size: 15px;
  line-height: 1.85;
  color: #47525C;
}

.page-about .ab-tl__body p {
  margin: 0 0 10px;
}

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

.page-about .ab-tl__list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .ab-tl__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14.5px;
  line-height: 1.7;
  color: #47525C;
}

.page-about .ab-tl__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.75em;
  width: 7px;
  height: 1px;
  background: var(--grass);
}

.page-about .ab-tl__fig {
  margin-block: clamp(20px, 2.6vw, 32px);
}

/* ---------- 章节三：团队 ---------- */

.page-about .ab-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 48px);
}

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

.page-about .ab-tcard {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 26px 26px 30px;
  background: var(--panel);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
  transition: background-color 0.3s ease;
}

.page-about .ab-tcard:hover {
  background: #16324A;
}

.page-about .ab-tcard__num {
  font-family: var(--font-mono);
  font-size: clamp(36px, 4.4vw, 54px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--cyan);
}

.page-about .ab-tcard:nth-child(2) .ab-tcard__num {
  color: var(--grass-lit);
}

.page-about .ab-tcard:nth-child(3) .ab-tcard__num {
  color: var(--orange);
}

.page-about .ab-tcard__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 18px;
  letter-spacing: -0.01em;
  color: var(--mist);
}

.page-about .ab-tcard p {
  margin: 0;
  font-size: 14.8px;
  line-height: 1.85;
  color: var(--silver);
}

.page-about .ab-team__aside {
  border-top: 1px solid var(--ab-hair-strong);
  padding-top: 22px;
}

.page-about .ab-team__aside-title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-size: 18px;
  letter-spacing: -0.01em;
  color: var(--mist);
}

.page-about .ab-team__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .ab-team__list li {
  padding-left: 14px;
  border-left: 1px solid rgba(0, 229, 196, 0.4);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--silver);
}

.page-about .ab-team__k {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-about .ab-team__hint {
  margin: 22px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--graphite);
}

/* ---------- 章节四：资质展签 ---------- */

.page-about .ab-plates {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.page-about .ab-plate {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 26px 24px 28px;
  background: var(--ink-900);
  border: 1px solid var(--ab-hair);
  border-left: 3px solid var(--grass);
  transition: border-color 0.28s ease, transform 0.32s ease, background-color 0.28s ease;
}

.page-about .ab-plate:hover,
.page-about .ab-plate:focus-visible {
  outline: none;
  background: #0E2334;
  border-color: var(--cyan);
  border-left-color: var(--cyan);
  transform: translateY(-4px);
}

.page-about .ab-plate__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.page-about .ab-plate__idx {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--orange);
}

.page-about .ab-tag {
  display: inline-block;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  border: 1px solid currentColor;
  white-space: nowrap;
}

.page-about .ab-tag--grass {
  color: var(--grass-lit);
}

.page-about .ab-tag--amber {
  color: var(--amber);
}

.page-about .ab-plate__title {
  margin: 6px 0 0;
  font-family: var(--font-display);
  font-size: clamp(17px, 1.9vw, 21px);
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--mist);
}

.page-about .ab-plate__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.02em;
  color: var(--graphite);
}

.page-about .ab-plate__detail {
  margin-top: 6px;
  padding-top: 14px;
  border-top: 1px dashed var(--ab-hair);
}

.page-about .ab-plate__detail p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--silver);
}

/* ---------- 章节五：合作生态 ---------- */

.page-about .ab-bars {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(22px, 2.6vw, 34px);
}

.page-about .ab-bar__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 10px;
}

.page-about .ab-bar__label {
  font-size: clamp(15px, 1.5vw, 17px);
  font-weight: 600;
  color: var(--mist);
  letter-spacing: -0.005em;
}

.page-about .ab-bar__num {
  font-family: var(--font-mono);
  font-size: clamp(18px, 2vw, 22px);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-about .ab-bar__track {
  height: 6px;
  background: rgba(176, 190, 197, 0.14);
  overflow: hidden;
}

.page-about .ab-bar__fill {
  display: block;
  height: 100%;
  width: var(--ab-w, 0%);
  background: linear-gradient(90deg, var(--cyan) 0%, var(--grass-lit) 100%);
}

.page-about .ab-bar--a {
  --ab-w: 35%;
}

.page-about .ab-bar--b {
  --ab-w: 28%;
}

.page-about .ab-bar--c {
  --ab-w: 22%;
}

.page-about .ab-bar--d {
  --ab-w: 15%;
}

.page-about .ab-bar__desc {
  margin: 12px 0 0;
  max-width: 72ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--graphite);
}

/* ---------- 章节六：青岛节点 ---------- */

.page-about .ab-chapter--last {
  padding-top: clamp(36px, 5vw, 64px);
}

.page-about .ab-fig--wide .ab-fig__frame {
  clip-path: polygon(0 0, 100% 0, 100% 100%, 34px 100%, 0 calc(100% - 26px));
}

.page-about .ab-qd {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 3.6vw, 44px);
  margin-top: clamp(28px, 4vw, 48px);
}

.page-about .ab-qd__text .ab-head__idx {
  margin-bottom: 10px;
}

.page-about .ab-qd__text .ab-head__title {
  margin-bottom: 18px;
}

.page-about .ab-qd__text p {
  margin: 0 0 14px;
  max-width: 64ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--silver);
}

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

.page-about .ab-qd__facts {
  display: grid;
  gap: 0;
  align-content: start;
  border-top: 1px solid var(--ab-hair-strong);
}

.page-about .ab-qd__fact {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 15px 0;
  border-bottom: 1px solid var(--ab-hair);
}

.page-about .ab-qd__num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.2vw, 38px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--grass-lit);
  min-width: 2.2ch;
}

.page-about .ab-qd__fact em {
  font-style: normal;
  font-size: 13px;
  line-height: 1.65;
  color: var(--graphite);
}

/* ---------- 收尾 ---------- */

.page-about .ab-chapter--cta {
  background: var(--ink-950);
  padding-block: clamp(44px, 6vw, 84px);
}

.page-about .ab-cta {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3vw, 40px);
  align-items: center;
  padding-top: clamp(24px, 3vw, 36px);
  border-top: 1px solid var(--ab-hair-strong);
}

.page-about .ab-cta__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(23px, 3vw, 38px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--mist);
}

.page-about .ab-cta__text p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--silver);
}

.page-about .ab-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 620px) {
  .page-about .ab-team__cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .ab-team__cards > :nth-child(3) {
    grid-column: 1 / -1;
  }

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

  .page-about .ab-plates > :nth-child(3) {
    grid-column: 1 / -1;
  }
}

@media (min-width: 760px) {
  .page-about .ab-tl__node {
    grid-template-columns: 148px minmax(0, 1fr);
    gap: clamp(24px, 3vw, 44px);
    align-items: start;
  }

  .page-about .ab-tl__panel {
    padding-left: 26px;
  }
}

@media (min-width: 900px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: start;
    gap: clamp(36px, 5vw, 72px);
  }

  .page-about .ab-flow-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: start;
  }

  .page-about .ab-team {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: start;
  }

  .page-about .ab-qd {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: start;
  }

  .page-about .ab-cta {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  }

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

  .page-about .ab-plates > :nth-child(3) {
    grid-column: auto;
  }
}
<<<END>>>