.page-about {
  --ab-rail-w: 208px;
  --ab-body: rgba(232, 241, 248, .82);
  display: block;
  overflow-x: hidden;
}

/* ============ 首屏 ============ */
.page-about .ab-hero {
  position: relative;
  padding: 26px 0 0;
  background:
    radial-gradient(120% 90% at 86% -22%, rgba(57, 255, 136, .14), transparent 58%),
    radial-gradient(80% 70% at 2% 112%, rgba(34, 211, 238, .10), transparent 62%),
    linear-gradient(180deg, var(--bg-deep) 0%, var(--bg) 74%);
  overflow: hidden;
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 96px 96px;
  pointer-events: none;
}

.page-about .ab-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  list-style: none;
  margin: 0 0 28px;
  padding: 0;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
}

.page-about .breadcrumbs li {
  display: flex;
  align-items: center;
}

.page-about .breadcrumbs li + li::before {
  content: "/";
  margin: 0 10px;
  color: var(--line-2);
}

.page-about .breadcrumbs a {
  color: var(--muted);
  text-decoration: none;
  transition: color var(--t-fast);
}

.page-about .breadcrumbs a:hover {
  color: var(--acc);
}

.page-about .ab-hero__title {
  margin: 10px 0 20px;
  max-width: 17ch;
  font-family: var(--sans);
  font-size: clamp(32px, 5.4vw, 68px);
  font-weight: 300;
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--ink);
}

.page-about .ab-hero__lead {
  margin: 0;
  max-width: 42em;
  font-size: clamp(15px, 1.15vw, 17px);
  line-height: 1.8;
  color: var(--ab-body);
}

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

/* 数据条 */
.page-about .ab-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 38px 0 0;
  padding: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  position: relative;
  z-index: 1;
}

.page-about .ab-stat {
  background: var(--bg-2);
  padding: 18px 16px 16px;
  min-width: 0;
}

.page-about .ab-stat__num {
  display: block;
  margin: 0 0 6px;
  font-family: var(--mono);
  font-size: clamp(26px, 3vw, 38px);
  line-height: 1;
  color: var(--white);
}

.page-about .ab-stat--acc .ab-stat__num {
  color: var(--acc);
}

.page-about .ab-stat--cyan .ab-stat__num {
  color: var(--cyan);
}

.page-about .ab-stat__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
}

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

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

.page-about .ab-figure--wide img {
  aspect-ratio: 2 / 1;
}

.page-about .ab-figure--16x9 img {
  aspect-ratio: 16 / 10;
}

.page-about .ab-figure__tag {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 6px 12px;
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--ink);
  background: rgba(9, 17, 27, .84);
  border-top: 1px solid var(--line);
  border-right: 1px solid var(--line);
}

.page-about .ab-hero__media {
  margin: 40px 0 0;
  position: relative;
  z-index: 1;
}

/* ============ 主体两栏 ============ */
.page-about .ab-body {
  padding: clamp(40px, 6vw, 80px) 0 clamp(52px, 7vw, 96px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  column-gap: 0;
  align-items: start;
}

.page-about .ab-rail {
  display: none;
}

.page-about .ab-content {
  display: grid;
  gap: clamp(46px, 6vw, 88px);
  min-width: 0;
}

/* ============ 区块通用 ============ */
.page-about .ab-block {
  min-width: 0;
}

.page-about .ab-block__head {
  max-width: 48em;
  margin-bottom: 26px;
}

.page-about .ab-block__title {
  margin: 8px 0 14px;
  font-size: clamp(25px, 3.1vw, 40px);
  font-weight: 300;
  line-height: 1.18;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-about .ab-block__text {
  margin: 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--ab-body);
}

/* ============ 010 三条路径 ============ */
.page-about .ab-paths {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .ab-path {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  grid-template-rows: auto auto;
  gap: 6px 14px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .ab-path__no {
  grid-column: 1;
  grid-row: 1 / span 2;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--cyan);
  padding-top: 5px;
}

.page-about .ab-path__title {
  grid-column: 2;
  margin: 0;
  font-size: 17px;
  font-weight: 500;
  color: var(--ink);
}

.page-about .ab-path__text {
  grid-column: 2;
  margin: 0;
  max-width: 46em;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ab-body);
}

/* ============ 020 四条主线 ============ */
.page-about .ab-tracks {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .ab-track {
  background: var(--bg-2);
  min-width: 0;
}

.page-about .ab-track__link {
  display: flex;
  flex-direction: column;
  gap: 10px;
  height: 100%;
  padding: 24px 20px 22px;
  text-decoration: none;
  color: inherit;
  border-top: 2px solid transparent;
  transition: background var(--t-base), border-color var(--t-base);
}

.page-about .ab-track__link:hover,
.page-about .ab-track__link:focus-visible {
  background: var(--bg-3);
  border-top-color: var(--acc);
}

.page-about .ab-track__idx {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-about .ab-track__title {
  margin: 0;
  font-size: 17px;
  font-weight: 500;
  line-height: 1.35;
  color: var(--ink);
}

.page-about .ab-track__text {
  margin: 0;
  flex: 1 1 auto;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--muted);
}

.page-about .ab-track__go {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--acc);
}

/* ============ 030 团队 ============ */
.page-about .ab-roles {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .ab-role {
  background: var(--bg-2);
  padding: 22px 20px 20px;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.page-about .ab-role__count {
  margin: 0;
  font-family: var(--mono);
  font-size: 40px;
  line-height: 1;
  color: var(--acc);
}

.page-about .ab-role__title {
  margin: 12px 0 8px;
  font-size: 16px;
  font-weight: 500;
  color: var(--ink);
}

.page-about .ab-role__text {
  margin: 0 0 16px;
  flex: 1 1 auto;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--ab-body);
}

.page-about .ab-role__out {
  margin: 0;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--cyan);
}

.page-about .ab-figures {
  list-style: none;
  margin: 30px 0 0;
  padding: 22px 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

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

.page-about .ab-figures .num {
  display: block;
  margin-bottom: 6px;
  font-family: var(--mono);
  font-size: 26px;
  line-height: 1;
  color: var(--white);
}

/* ============ 040 赛季时间轴 ============ */
.page-about .ab-season {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .ab-season__item {
  position: relative;
  padding: 0 0 32px 34px;
}

.page-about .ab-season__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  width: 13px;
  height: 13px;
  background: var(--bg-2);
  border: 1px solid var(--line-2);
}

.page-about .ab-season__item::after {
  content: "";
  position: absolute;
  left: 6px;
  top: 20px;
  bottom: 0;
  width: 1px;
  background: var(--line);
}

.page-about .ab-season__item:last-child {
  padding-bottom: 0;
}

.page-about .ab-season__item:last-child::after {
  display: none;
}

.page-about .ab-season__item--now::before {
  background: var(--acc);
  border-color: var(--acc);
  box-shadow: 0 0 0 4px rgba(57, 255, 136, .16);
}

.page-about .ab-season__meta {
  margin: 0 0 6px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--cyan);
}

.page-about .ab-season__item--now .ab-season__meta {
  color: var(--acc);
}

.page-about .ab-season__title {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 500;
  line-height: 1.4;
  color: var(--ink);
}

.page-about .ab-season__text {
  margin: 0;
  max-width: 44em;
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--ab-body);
}

/* ============ 050 流程 ============ */
.page-about .ab-process {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  align-items: start;
}

.page-about .ab-process__steps {
  display: grid;
  gap: 8px;
  min-width: 0;
}

.page-about .ab-step {
  border: 1px solid var(--line);
  background: var(--bg-2);
  transition: border-color var(--t-fast);
}

.page-about .ab-step[open] {
  border-color: var(--line-2);
}

.page-about .ab-step > summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  color: var(--ink);
}

.page-about .ab-step > summary::-webkit-details-marker {
  display: none;
}

.page-about .ab-step[open] > summary {
  border-bottom: 1px solid var(--line);
}

.page-about .ab-step__num {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--acc);
}

.page-about .ab-step__title {
  flex: 1 1 auto;
  min-width: 0;
}

.page-about .ab-step__meta {
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted);
  white-space: nowrap;
}

.page-about .ab-step .accordion__body {
  padding: 14px 16px 18px;
}

.page-about .ab-step .accordion__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.76;
  color: var(--ab-body);
}

.page-about .ab-process__media {
  min-width: 0;
}

/* ============ 060 反馈闭环 ============ */
.page-about .ab-promises {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .ab-promise {
  background: var(--bg-2);
  padding: 22px 20px 20px;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.page-about .ab-promise__tag {
  align-self: flex-start;
  margin: 0 0 14px;
}

.page-about .ab-promise__title {
  margin: 0 0 10px;
  font-size: 16.5px;
  font-weight: 500;
  line-height: 1.45;
  color: var(--ink);
}

.page-about .ab-promise__text {
  margin: 0 0 16px;
  flex: 1 1 auto;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ab-body);
}

.page-about .ab-promise__time {
  margin: 0;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 14px;
  color: var(--acc);
}

.page-about .ab-promise__foot {
  margin: 22px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .ab-promise__foot a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 211, 238, .4);
}

.page-about .ab-promise__foot a:hover {
  color: var(--acc);
  border-bottom-color: var(--acc);
}

/* ============ 070 贵州运营 ============ */
.page-about .ab-region {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  padding: clamp(22px, 3.4vw, 40px);
  background: var(--bg-3);
  border: 1px solid var(--line);
}

.page-about .ab-region__text {
  min-width: 0;
}

.page-about .ab-region__lead {
  margin: 0 0 22px;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink);
}

.page-about .ab-contacts {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  border-top: 1px solid var(--line-2);
}

.page-about .ab-contacts li {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 12px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
}

.page-about .ab-contacts__k {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
  padding-top: 2px;
}

.page-about .ab-contacts__v {
  font-family: var(--mono);
  color: var(--white);
  overflow-wrap: anywhere;
}

.page-about .ab-region__note {
  margin: 0 0 20px;
  font-size: 13px;
  line-height: 1.75;
  color: var(--ab-body);
}

.page-about .ab-region__media {
  min-width: 0;
}

/* ============ 响应式 ============ */
@media (min-width: 640px) {
  .page-about .ab-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

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

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

@media (min-width: 900px) {
  .page-about .ab-region {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 34px;
    align-items: start;
  }

  .page-about .ab-process {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: 34px;
  }
}

@media (min-width: 1000px) {
  .page-about .ab-body {
    grid-template-columns: var(--ab-rail-w) minmax(0, 1fr);
    column-gap: 56px;
  }

  .page-about .ab-rail {
    display: block;
    position: sticky;
    top: 132px;
    align-self: start;
  }

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

@media (min-width: 1180px) {
  .page-about .ab-tracks {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* 左侧索引 */
.page-about .ab-rail__head {
  margin: 0 0 18px;
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--muted);
}

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

.page-about .ab-rail__item {
  position: relative;
  padding-left: 24px;
}

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

.page-about .ab-rail__item:last-child::before {
  bottom: auto;
  height: 18px;
}

.page-about .ab-rail__item::after {
  content: "";
  position: absolute;
  left: 2px;
  top: 14px;
  width: 9px;
  height: 9px;
  background: var(--bg);
  border: 1px solid var(--line-2);
}

.page-about .ab-rail__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 0;
  font-size: 13px;
  line-height: 1.5;
  color: var(--muted);
  text-decoration: none;
  transition: color var(--t-fast);
}

.page-about .ab-rail__link:hover,
.page-about .ab-rail__link:focus-visible {
  color: var(--acc);
}

.page-about .ab-rail__idx {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--cyan);
}

@media (max-width: 999px) {
  .page-about .ab-rail {
    display: none;
  }

  .page-about .ab-contacts li {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

  .page-about .ab-step > summary {
    flex-wrap: wrap;
  }

  .page-about .ab-step__meta {
    white-space: normal;
  }
}