.page-about {
  --ab-ink-on-paper: #2B3448;
  --ab-gap: clamp(20px, 3.4vw, 40px);
  --ab-sec-pad: clamp(48px, 7vw, 96px);
}

.page-about .wrap {
  padding-inline: var(--gutter);
}

/* ---------- 面包屑与首屏 ---------- */
.page-about .ab-top {
  padding-top: calc(var(--bar-h) + 18px);
}

.page-about .ab-hero {
  padding-top: clamp(22px, 3vw, 38px);
}

.page-about .ab-hero__grid {
  display: grid;
  gap: var(--ab-gap);
}

.page-about .ab-hero__lead .eyebrow {
  display: inline-block;
  margin: 0 0 14px;
}

.page-about .ab-hero h1 {
  margin: 0 0 18px;
  font-size: clamp(2.1rem, 6.6vw, 4.4rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--paper);
  max-width: 22ch;
}

.page-about .ab-hero .lede {
  margin: 0 0 14px;
  color: var(--mist);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.75;
}

.page-about .ab-hero__p {
  margin: 0 0 24px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
  max-width: 62ch;
}

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

.page-about .ab-hero__media {
  margin: clamp(28px, 4.5vw, 52px) 0 0;
}

/* 规模塔 */
.page-about .ab-tower {
  border: 1px solid var(--line);
  background: var(--ink-800);
}

.page-about .ab-tower__head {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 13px 16px;
  border-bottom: 1px solid var(--line);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--mist);
}

.page-about .ab-tower__dot {
  width: 7px;
  height: 7px;
  background: var(--volt);
  box-shadow: var(--glow-volt);
}

.page-about .ab-tower__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
}

.page-about .ab-cell {
  background: var(--ink-800);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 5px;
}

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

.page-about .ab-cell__num {
  font-family: var(--font-mono);
  font-size: 1.85rem;
  line-height: 1;
  font-weight: 600;
  color: var(--thunder);
  letter-spacing: -0.02em;
}

.page-about .ab-cell__plus {
  color: var(--volt);
}

.page-about .ab-cell__label {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.5;
}

/* ---------- 通用章节 ---------- */
.page-about .ab-sec {
  padding-block: var(--ab-sec-pad);
}

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

.page-about .ab-h2 {
  margin: 0 0 18px;
  font-size: clamp(1.6rem, 3.6vw, 2.5rem);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.015em;
  color: var(--paper);
  max-width: 24ch;
}

.page-about .ab-h2--dark {
  color: var(--ink-950);
}

.page-about .ab-h3 {
  margin: 0 0 10px;
  font-size: clamp(1.1rem, 2.2vw, 1.4rem);
  font-weight: 700;
  color: var(--paper);
}

.page-about .ab-body {
  margin: 0 0 16px;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.85;
  max-width: 64ch;
}

.page-about .ab-body--wide {
  max-width: 78ch;
}

.page-about .ab-body--dark {
  color: var(--ab-ink-on-paper);
}

/* 两栏 */
.page-about .ab-split {
  display: grid;
  gap: var(--ab-gap);
}

.page-about .ab-side-media {
  margin: 0 0 20px;
}

.page-about .ab-note {
  border: 1px solid var(--line);
  border-left: 2px solid var(--volt);
  background: var(--ink-800);
  padding: 16px 18px;
}

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

.page-about .ab-note p {
  margin: 0 0 10px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .ab-link {
  color: var(--volt);
  text-decoration: none;
  font-size: 14px;
  border-bottom: 1px solid rgba(53, 224, 208, 0.4);
}

.page-about .ab-link:hover,
.page-about .ab-link:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--paper);
}

.page-about .ab-link--dark {
  color: #1D6E68;
  border-bottom-color: rgba(29, 110, 104, 0.4);
}

.page-about .ab-link--dark:hover,
.page-about .ab-link--dark:focus-visible {
  color: var(--ink-950);
  border-bottom-color: var(--ink-950);
}

.page-about .ab-side-caption {
  margin: 14px 0 0;
  font-size: 13px;
  color: var(--muted);
}

.page-about .ab-side-caption--dark {
  color: rgba(43, 52, 72, 0.72);
}

/* ---------- 赛区切换 ---------- */
.page-about .ab-zones {
  margin-top: 26px;
}

.page-about .ab-zones__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
  padding: 0;
  border: 0;
}

.page-about .ab-zbtn {
  appearance: none;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--mist);
  border-radius: 0;
  padding: 9px 16px;
  font: inherit;
  font-size: 14px;
  cursor: pointer;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .ab-zbtn:hover {
  color: var(--paper);
  border-color: var(--mist);
}

.page-about .ab-zbtn[aria-selected="true"] {
  color: var(--thunder);
  border-color: var(--thunder);
  background: rgba(255, 106, 43, 0.09);
  box-shadow: inset 0 0 0 1px rgba(255, 106, 43, 0.28);
}

.page-about .ab-zone-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(158px, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line);
}

.page-about .ab-zone {
  background: var(--ink-900);
  padding: 15px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .ab-zone__no {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--volt);
  letter-spacing: 0.08em;
}

.page-about .ab-zone__name {
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
}

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

/* ---------- 团队折叠 ---------- */
.page-about .ab-fold {
  margin-top: 22px;
  border-top: 1px solid var(--line);
}

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

.page-about .ab-fold__sum {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 15px 0;
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  color: var(--paper);
  list-style: none;
}

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

.page-about .ab-fold__sum::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--volt);
}

.page-about .ab-fold__item[open] .ab-fold__sum::after {
  content: "–";
}

.page-about .ab-fold__no {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--thunder);
  letter-spacing: 0.1em;
}

.page-about .ab-fold__item p {
  margin: 0 0 16px;
  padding-left: 26px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
  max-width: 60ch;
}

/* 数据表 */
.page-about .ab-meter {
  border: 1px solid var(--line);
  background: var(--ink-800);
}

.page-about .ab-meter__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 13px 16px;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .ab-meter__row:last-child {
  border-bottom: 0;
}

.page-about .ab-meter__k {
  font-size: 13px;
  color: var(--muted);
}

.page-about .ab-meter__v {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--volt);
  white-space: nowrap;
}

/* ---------- 时间轴 ---------- */
.page-about .ab-tl-media {
  margin: 26px 0 30px;
}

.page-about .ab-tl__list {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(150px, 1fr);
  overflow-x: auto;
  border-bottom: 1px solid var(--line);
  scrollbar-width: thin;
}

.page-about .ab-tl__node {
  appearance: none;
  background: transparent;
  border: 0;
  border-top: 2px solid var(--line);
  border-radius: 0;
  padding: 14px 14px 16px;
  text-align: left;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 6px;
  color: var(--muted);
  font: inherit;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .ab-tl__node:hover {
  color: var(--mist);
}

.page-about .ab-tl__node[aria-selected="true"] {
  border-top-color: var(--thunder);
  color: var(--paper);
  background: linear-gradient(180deg, rgba(255, 106, 43, 0.16), rgba(255, 106, 43, 0));
}

.page-about .ab-tl__ver {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
}

.page-about .ab-tl__node[aria-selected="true"] .ab-tl__ver {
  color: var(--thunder);
  text-shadow: var(--glow-thunder);
}

.page-about .ab-tl__name {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
}

.page-about .ab-tl__panel {
  padding-top: 24px;
  max-width: 76ch;
}

.page-about .ab-tl__panel p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .ab-bullets {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-about .ab-bullets li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--paper);
}

.page-about .ab-bullets li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 1px;
  background: var(--volt);
  box-shadow: var(--glow-volt);
}

/* ---------- 暖纸色区块 ---------- */
.page-about .ab-paper {
  background: var(--paper);
  color: var(--ab-ink-on-paper);
  padding-block: clamp(48px, 7vw, 88px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .ab-eyebrow--dark {
  color: #8A5A2A;
}

.page-about .ab-eco {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: rgba(43, 52, 72, 0.22);
  border: 1px solid rgba(43, 52, 72, 0.22);
}

.page-about .ab-eco__item {
  background: var(--paper);
  padding: 14px 16px;
  display: flex;
  gap: 12px;
  align-items: baseline;
}

.page-about .ab-eco__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: #A2521F;
  letter-spacing: 0.1em;
  flex: 0 0 auto;
}

.page-about .ab-eco__txt {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ab-ink-on-paper);
}

/* ---------- 承诺 ---------- */
.page-about .ab-promise {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 1px;
  margin-top: 28px;
  background: var(--line-soft);
  border: 1px solid var(--line);
}

.page-about .ab-promise__card {
  background: var(--ink-900);
  padding: 22px 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .ab-promise__num {
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  font-weight: 600;
  line-height: 1;
  color: var(--thunder);
  letter-spacing: -0.02em;
}

.page-about .ab-promise__unit {
  font-size: 0.5em;
  color: var(--volt);
  margin-left: 4px;
}

.page-about .ab-promise__txt {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .ab-cta {
  margin-top: clamp(34px, 5vw, 56px);
  border: 1px solid var(--line);
  border-left: 3px solid var(--thunder);
  background: var(--ink-800);
  padding: clamp(22px, 3.4vw, 34px);
  display: grid;
  gap: 20px;
}

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

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

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .ab-cta {
    grid-template-columns: minmax(0, 1.4fr) auto;
    align-items: center;
  }
}

@media (min-width: 900px) {
  .page-about .ab-tl__list {
    grid-auto-flow: row;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    overflow-x: visible;
  }
}

@media (min-width: 1000px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.65fr) minmax(280px, 0.85fr);
    align-items: start;
  }

  .page-about .ab-split {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  }

  .page-about .ab-split--flip {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
  }

  .page-about .ab-hero__p {
    font-size: 16px;
  }
}

@media (min-width: 1200px) {
  .page-about .ab-hero h1 {
    font-size: 4.6rem;
  }
}
<<<END>>>