.page-about {
  --ab-ink-soft: rgba(11, 27, 58, .78);
  --ab-ink-mute: rgba(11, 27, 58, .6);
  --ab-line: rgba(11, 27, 58, .14);
  --ab-line-light: rgba(244, 239, 230, .14);
  --ab-panel-tint: rgba(244, 239, 230, .045);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  overflow: hidden;
  padding-block: 76px 88px;
  color: var(--paper);
  background:
    radial-gradient(115% 85% at 88% -6%, rgba(255, 107, 26, .22), transparent 58%),
    radial-gradient(80% 60% at 6% 100%, rgba(31, 138, 112, .16), transparent 62%),
    linear-gradient(162deg, var(--ink) 0%, var(--night) 78%);
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(244, 239, 230, .12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(244, 239, 230, .12) 1px, transparent 1px);
  background-size: 58px 58px;
  opacity: .55;
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 58px;
  background: var(--paper);
  clip-path: polygon(0 100%, 100% 16%, 100% 100%);
  pointer-events: none;
}

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

.page-about .ab-breadcrumb {
  margin-bottom: 30px;
  font-size: 13px;
}

.page-about .ab-breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-breadcrumb li:not(:last-child)::after {
  content: "/";
  margin-left: 8px;
  color: var(--paper-50);
}

.page-about .ab-breadcrumb a,
.page-about .ab-breadcrumb li {
  color: var(--paper-70);
  text-decoration: none;
}

.page-about .ab-breadcrumb a:hover {
  color: var(--flame);
}

.page-about .ab-breadcrumb [aria-current="page"] {
  color: var(--paper);
}

.page-about .ab-hero-title {
  margin: 18px 0 0;
  max-width: 14em;
}

.page-about .ab-hero-lede {
  margin: 22px 0 0;
  max-width: 40em;
  color: var(--paper-88);
}

.page-about .ab-stats {
  margin-top: 46px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--ab-line-light);
  border: 1px solid var(--ab-line-light);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .ab-stat {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 18px 22px;
  background: rgba(8, 21, 44, .62);
}

.page-about .ab-stat-num {
  font-family: var(--font-mono);
  font-size: 34px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: -.01em;
  color: var(--flame);
}

.page-about .ab-stat:nth-child(2) .ab-stat-num { color: var(--sand); }
.page-about .ab-stat:nth-child(3) .ab-stat-num { color: var(--jade); }
.page-about .ab-stat:nth-child(4) .ab-stat-num { color: var(--paper); }

.page-about .ab-stat-label {
  font-size: 13px;
  line-height: 1.6;
  letter-spacing: .06em;
  color: var(--paper-70);
}

/* ---------- 通用章节 ---------- */
.page-about .ab-sec {
  padding-block: 68px;
}

.page-about .ab-sec-head {
  max-width: 46em;
}

.page-about .ab-sec-lede {
  margin-top: 16px;
  color: var(--ab-ink-soft);
}

.page-about .prose {
  color: var(--ab-ink-soft);
}

.page-about .section--night .prose,
.page-about .ab-partner-panel .prose {
  color: var(--paper-88);
}

.page-about .h-section {
  margin: 12px 0 0;
}

.page-about .eyebrow {
  margin: 0;
}

/* ---------- 时间线 ---------- */
.page-about .ab-tl-figure {
  margin: 38px 0 44px;
}

.page-about .ab-tl {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-tl::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 18px;
  width: 1px;
  background: linear-gradient(180deg, var(--flame) 0%, rgba(11, 27, 58, .18) 14%, rgba(11, 27, 58, .14) 100%);
}

.page-about .ab-tl-item {
  position: relative;
  padding: 26px 0 26px 30px;
  border-top: 1px solid var(--ab-line);
}

.page-about .ab-tl-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 32px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--flame);
  box-sizing: border-box;
  transition: background .3s var(--ease), transform .3s var(--ease);
}

.page-about .ab-tl-item:hover::before {
  background: var(--flame);
  transform: scale(1.15);
}

.page-about .ab-tl-item:first-child {
  border-top: 0;
  padding-top: 20px;
}

.page-about .ab-tl-item:first-child::before {
  top: 26px;
}

.page-about .ab-tl-mark {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.page-about .ab-tl-year {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--ink);
  transition: color .28s var(--ease);
}

.page-about .ab-tl-item:hover .ab-tl-year {
  color: var(--flame);
}

.page-about .ab-tl-tag {
  padding: 4px 11px;
  border: 1px solid var(--ab-line);
  border-radius: var(--r-pill);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--stone);
  transition: border-color .28s var(--ease), color .28s var(--ease);
}

.page-about .ab-tl-item:hover .ab-tl-tag {
  border-color: rgba(255, 107, 26, .5);
  color: var(--clay);
}

.page-about .ab-tl-body .h-card {
  margin: 0 0 8px;
}

.page-about .ab-tl-body .prose {
  margin: 0;
  max-width: 40em;
}

/* ---------- 团队 ---------- */
.page-about .ab-team-grid {
  display: grid;
  gap: 40px;
}

.page-about .ab-team-lede {
  margin-top: 16px;
  max-width: 34em;
}

.page-about .ab-roles {
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-about .ab-role {
  padding: 18px 18px 20px;
  border: 1px solid var(--ab-line-light);
  border-radius: var(--r-md);
  background: var(--ab-panel-tint);
  transition: transform .3s var(--ease), border-color .3s var(--ease), background .3s var(--ease);
}

.page-about .ab-role:hover {
  transform: translateY(-3px);
  background: rgba(244, 239, 230, .075);
  border-color: rgba(255, 107, 26, .45);
}

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

.page-about .ab-role .ab-chip {
  border: 1px solid var(--ab-line-light);
  background: transparent;
  color: var(--paper-88);
  letter-spacing: .04em;
}

.page-about .ab-role--data .ab-chip { border-color: rgba(255, 107, 26, .55); color: #FFB27A; }
.page-about .ab-role--lang .ab-chip { border-color: rgba(217, 164, 65, .55); color: #EBC479; }
.page-about .ab-role--youth .ab-chip { border-color: rgba(31, 138, 112, .6); color: #6FD3B8; }
.page-about .ab-role--tech .ab-chip { border-color: rgba(196, 85, 43, .6); color: #E89371; }

.page-about .ab-role-num {
  font-family: var(--font-mono);
  font-size: 19px;
  font-weight: 600;
  color: var(--paper);
  white-space: nowrap;
}

.page-about .ab-role-unit {
  margin-left: 3px;
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 400;
  color: var(--paper-50);
}

.page-about .ab-role-desc {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper-70);
}

.page-about .ab-team-figure {
  margin: 0;
}

.page-about .ab-team-figure img,
.page-about .ab-tl-figure img,
.page-about .ab-partner-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--r-lg);
}

/* ---------- 内容方法 ---------- */
.page-about .ab-method-head {
  padding-bottom: 0;
}

.page-about .ab-method-head .prose {
  margin-top: 16px;
}

.page-about .ab-method-grid {
  margin-top: 40px;
}

.page-about .ab-method-row {
  display: grid;
  gap: 10px;
  padding: 24px 0;
  border-top: 1px solid var(--ab-line);
}

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

.page-about .ab-method-key {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0;
  font-size: 19px;
  font-weight: 800;
  letter-spacing: .01em;
  color: var(--ink);
}

.page-about .ab-method-idx {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .12em;
  color: var(--clay);
}

.page-about .ab-method-val {
  margin: 0;
  max-width: 42em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ab-ink-soft);
}

/* ---------- 合作生态 ---------- */
.page-about .ab-partner-panel {
  position: relative;
  overflow: hidden;
  margin-top: 32px;
  padding: 30px 22px 34px;
  border-radius: var(--r-lg);
  background: linear-gradient(152deg, var(--ink-2) 0%, var(--ink) 100%);
  color: var(--paper);
  display: grid;
  gap: 30px;
}

.page-about .ab-partner-panel::before {
  content: "";
  position: absolute;
  top: -45%;
  right: -18%;
  width: 58%;
  height: 190%;
  background: linear-gradient(180deg, rgba(255, 107, 26, .15), transparent 72%);
  transform: rotate(-13deg);
  pointer-events: none;
}

.page-about .ab-partner-figure,
.page-about .ab-partner-copy {
  position: relative;
  z-index: 1;
}

.page-about .ab-partner-figure {
  margin: 0;
}

.page-about .ab-partner-copy .prose {
  margin: 0;
  max-width: 36em;
}

.page-about .ab-partner-list {
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 18px;
}

.page-about .ab-partner-list li {
  display: grid;
  grid-template-columns: 12px minmax(0, 1fr);
  gap: 14px;
  padding-top: 16px;
  border-top: 1px solid var(--ab-line-light);
}

.page-about .ab-partner-list li::before {
  content: "";
  width: 8px;
  height: 8px;
  margin-top: 9px;
  border-radius: 50%;
  background: var(--jade);
  box-shadow: 0 0 0 4px rgba(31, 138, 112, .18);
}

.page-about .ab-partner-list b {
  display: block;
  margin-bottom: 4px;
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .ab-partner-list span {
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper-70);
}

.page-about .ab-partner-note {
  margin: 24px 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--sand);
  font-size: 14px;
  line-height: 1.85;
  color: var(--paper-70);
}

/* ---------- 荣誉 ---------- */
.page-about .ab-awards {
  margin-top: 34px;
  display: grid;
  gap: 18px;
}

.page-about .ab-award {
  position: relative;
  overflow: hidden;
  padding: 26px 24px 28px;
  border: 1px solid rgba(217, 164, 65, .55);
  border-radius: var(--r-lg);
  background: linear-gradient(155deg, var(--ink-2) 0%, var(--night) 100%);
  color: var(--paper);
  transition: transform .32s var(--ease), border-color .32s var(--ease), box-shadow .32s var(--ease);
}

.page-about .ab-award::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(70% 90% at 100% 0%, rgba(217, 164, 65, .18), transparent 62%);
  opacity: 0;
  transition: opacity .32s var(--ease);
  pointer-events: none;
}

.page-about .ab-award:hover,
.page-about .ab-award:focus-within {
  transform: translateY(-4px);
  border-color: var(--sand);
  box-shadow: 0 20px 44px -26px rgba(217, 164, 65, .75);
}

.page-about .ab-award:hover::after,
.page-about .ab-award:focus-within::after {
  opacity: 1;
}

.page-about .ab-award-year {
  position: relative;
  z-index: 1;
  display: block;
  font-family: var(--font-mono);
  font-size: 42px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--sand);
}

.page-about .ab-award-name {
  position: relative;
  z-index: 1;
  margin: 14px 0 0;
  font-size: 20px;
  color: var(--paper);
}

.page-about .ab-award-by {
  position: relative;
  z-index: 1;
  margin: 8px 0 0;
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--paper-50);
}

.page-about .ab-award-note {
  margin: 26px 0 0;
  max-width: 46em;
  padding-left: 18px;
  border-left: 2px solid var(--sand);
  font-size: 15px;
  line-height: 1.85;
  color: var(--ab-ink-mute);
}

/* ---------- 服务承诺 ---------- */
.page-about .ab-promise {
  margin: 40px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 30px;
}

.page-about .ab-promise-item {
  position: relative;
  padding-top: 26px;
  border-top: 1px solid var(--ab-line-light);
}

.page-about .ab-promise-bar {
  position: absolute;
  top: -1px;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--flame), var(--sand));
  transform-origin: left center;
  transition: width .9s var(--ease);
}

.has-js .page-about .ab-promise-bar {
  width: 0;
}

.has-js .page-about .ab-promise-item.is-in .ab-promise-bar {
  width: 100%;
}

.page-about .ab-promise-item:nth-child(2) .ab-promise-bar { transition-delay: .14s; }
.page-about .ab-promise-item:nth-child(3) .ab-promise-bar { transition-delay: .28s; }

.page-about .ab-promise-item .h-card {
  margin: 0 0 12px;
  color: var(--paper);
}

.page-about .ab-promise-item p {
  margin: 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--paper-70);
}

.page-about .ab-commitment-link {
  margin: 40px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper-70);
}

.page-about .ab-commitment-link a {
  color: var(--sand);
  text-underline-offset: 4px;
}

.page-about .ab-commitment-link a:hover {
  color: var(--flame);
}

/* ---------- 收尾行动 ---------- */
.page-about .ab-cta {
  position: relative;
  overflow: hidden;
  padding-block: 66px 88px;
  color: var(--paper);
  background:
    radial-gradient(90% 70% at 82% 0%, rgba(255, 107, 26, .18), transparent 60%),
    linear-gradient(160deg, var(--night) 0%, var(--ink) 100%);
}

.page-about .ab-cta::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(217, 164, 65, .7), transparent);
}

.page-about .ab-cta-title {
  margin: 0;
  max-width: 16em;
}

.page-about .ab-cta-lede {
  margin: 18px 0 0;
  max-width: 38em;
  color: var(--paper-88);
}

.page-about .ab-cta-actions {
  margin-top: 30px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .ab-roles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 860px) {
  .page-about .ab-sec {
    padding-block: 96px;
  }

  .page-about .ab-hero {
    padding-block: 116px 132px;
  }

  .page-about .ab-tl-item {
    display: grid;
    grid-template-columns: 186px minmax(0, 1fr);
    gap: 34px;
    align-items: start;
    padding: 42px 0 42px 40px;
  }

  .page-about .ab-tl-item--major {
    padding-block: 64px;
  }

  .page-about .ab-tl-item::before {
    top: 48px;
  }

  .page-about .ab-tl-item--major::before {
    top: 70px;
  }

  .page-about .ab-tl-item:first-child::before {
    top: 26px;
  }

  .page-about .ab-tl-mark {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 0;
  }

  .page-about .ab-method-row {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 40px;
    align-items: baseline;
    padding: 30px 0;
  }

  .page-about .ab-promise {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 32px;
  }

  .page-about .ab-awards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
  }
}

@media (min-width: 900px) {
  .page-about .ab-team-grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .ab-partner-panel {
    grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
    gap: 46px;
    align-items: center;
    padding: 46px;
  }
}

@media (min-width: 1080px) {
  .page-about .ab-hero-title {
    max-width: 12em;
  }

  .page-about .ab-stat-num {
    font-size: 40px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-tl-item::before,
  .page-about .ab-tl-year,
  .page-about .ab-tl-tag,
  .page-about .ab-role,
  .page-about .ab-award,
  .page-about .ab-promise-bar {
    transition: none;
  }

  .page-about .ab-award:hover,
  .page-about .ab-award:focus-within,
  .page-about .ab-role:hover {
    transform: none;
  }
}