.page-about {
  --ab-line: rgba(23, 26, 31, .12);
  --ab-line-dark: rgba(255, 253, 248, .2);
  --ab-shadow: 0 28px 64px -44px rgba(14, 42, 71, .6);
  display: block;
  background: var(--sand);
  color: var(--ink);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.page-about .bo-wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.page-about > section {
  position: relative;
  padding: 64px 0;
  overflow: hidden;
}

.page-about .ab-crumbs {
  margin: 0 0 26px;
}

.page-about .ab-crumbs ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 0;
  padding: 0;
  font-size: 13px;
  color: var(--mist);
}

.page-about .ab-crumbs li + li::before {
  content: "／";
  margin-right: 6px;
  color: rgba(92, 107, 122, .55);
}

.page-about .ab-crumbs a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid rgba(92, 107, 122, .4);
}

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

/* ---------- 通用文字层 ---------- */

.page-about .ab-kicker {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--brick);
}

.page-about .ab-kicker::before {
  content: "";
  width: 22px;
  height: 2px;
  background: currentColor;
  flex: none;
}

.page-about .ab-h1 {
  margin: 16px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(30px, 6.2vw, 56px);
  line-height: 1.14;
  letter-spacing: -.015em;
  color: var(--ink);
}

.page-about .ab-h2 {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(26px, 3.8vw, 44px);
  line-height: 1.18;
  letter-spacing: -.012em;
  color: var(--ink);
}

.page-about .ab-lead {
  margin: 18px 0 0;
  font-size: 16.5px;
  line-height: 1.82;
  color: #3A4149;
  max-width: 64ch;
}

.page-about .ab-body {
  margin: 0;
  font-size: 16px;
  line-height: 1.82;
  color: #3A4149;
}

.page-about .ab-body a {
  color: var(--brick);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px solid rgba(166, 58, 46, .45);
}

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

/* ---------- 首屏 ---------- */

.page-about .ab-hero {
  padding-top: 32px;
  padding-bottom: 60px;
  background:
    radial-gradient(1100px 500px at 90% -14%, rgba(166, 58, 46, .16), transparent 68%),
    linear-gradient(180deg, #FBF6EC 0%, var(--sand) 100%);
}

.page-about .ab-hero__grid {
  display: grid;
  gap: 34px;
  align-items: start;
}

.page-about .ab-hero__copy .ab-kicker {
  color: var(--brick);
}

.page-about .ab-hero__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 22px;
}

.page-about .ab-fact {
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding: 16px 0 14px;
  border-top: 1px solid var(--ab-line);
}

.page-about .ab-fact__num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 6vw, 38px);
  font-weight: 700;
  line-height: 1;
  color: var(--brick);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-fact__num small {
  font-family: var(--font-body);
  font-size: .46em;
  font-weight: 600;
  margin-left: 3px;
}

.page-about .ab-fact__num--outline {
  color: transparent;
  -webkit-text-stroke: 1.4px var(--brick);
}

.page-about .ab-fact__num--outline small {
  color: var(--brick);
  -webkit-text-stroke: 0;
}

.page-about .ab-fact__label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 图片容器 ---------- */

.page-about .ab-media {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  background: rgba(23, 26, 31, .06);
  box-shadow: var(--ab-shadow);
}

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

.page-about .ab-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(118deg, rgba(255, 255, 255, .16) 0%, rgba(255, 255, 255, 0) 46%);
  pointer-events: none;
}

.page-about .ab-media--frame {
  border: 1px solid var(--ab-line-dark);
}

/* ---------- 发展沿革时间线 ---------- */

.page-about .ab-timeline {
  background:
    radial-gradient(760px 420px at 92% 4%, rgba(217, 160, 60, .2), transparent 66%),
    linear-gradient(168deg, #4E3C7C 0%, var(--indigo) 48%, #2A1F49 100%);
  color: var(--paper);
}

.page-about .ab-timeline::before {
  content: "";
  position: absolute;
  top: -18%;
  right: -6%;
  width: 60%;
  height: 138%;
  background: repeating-linear-gradient(102deg, rgba(255, 255, 255, .05) 0 2px, transparent 2px 22px);
  transform: rotate(-4deg);
  pointer-events: none;
  opacity: .55;
}

.page-about .ab-timeline > .bo-wrap {
  position: relative;
  z-index: 1;
}

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

.page-about .ab-timeline .ab-h2 {
  color: var(--paper);
}

.page-about .ab-timeline .ab-lead {
  color: rgba(255, 253, 248, .78);
}

.page-about .ab-timeline__head {
  display: grid;
  gap: 32px;
  align-items: center;
}

.page-about .ab-axis {
  list-style: none;
  position: relative;
  margin: 52px 0 0;
  padding: 0;
}

.page-about .ab-axis::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(180deg, rgba(217, 160, 60, .9) 0%, rgba(217, 160, 60, .12) 100%);
}

.page-about .ab-axis__item {
  position: relative;
  padding: 0 0 40px 48px;
}

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

.page-about .ab-axis__item::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 9px;
  width: 16px;
  height: 16px;
  border-radius: 4px;
  background: var(--brick);
  box-shadow: 0 0 0 5px rgba(166, 58, 46, .26);
}

.page-about .ab-axis__year {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(22px, 5.6vw, 30px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--amber);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-axis__body {
  margin-top: 10px;
}

.page-about .ab-axis__title {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 800;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .ab-axis__text {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: rgba(255, 253, 248, .72);
  max-width: 66ch;
}

/* ---------- 内容团队 ---------- */

.page-about .ab-team {
  background: var(--paper);
}

.page-about .ab-team__cards {
  display: grid;
  gap: 18px;
  margin-top: 42px;
}

.page-about .ab-role {
  background: #FFFDF8;
  border: 1px solid var(--ab-line);
  border-radius: 18px;
  padding: 26px 22px 22px;
  box-shadow: 0 26px 60px -50px rgba(14, 42, 71, .8);
}

.page-about .ab-role--a { border-top: 4px solid var(--brick); }
.page-about .ab-role--b { border-top: 4px solid var(--amber); }
.page-about .ab-role--c { border-top: 4px solid var(--harbor-2); }

.page-about .ab-role__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .18em;
  color: var(--mist);
}

.page-about .ab-role__name {
  margin: 8px 0 10px;
  font-size: 20px;
  font-weight: 800;
  color: var(--ink);
}

.page-about .ab-role__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: #3A4149;
}

.page-about .ab-role details {
  margin-top: 18px;
  border-top: 1px dashed var(--ab-line);
  padding-top: 14px;
}

.page-about .ab-role summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  cursor: pointer;
  list-style: none;
  font-size: 14px;
  font-weight: 700;
  color: var(--brick);
}

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

.page-about .ab-role summary::after {
  content: "＋";
  font-family: var(--font-mono);
  font-weight: 700;
}

.page-about .ab-role details[open] summary::after {
  content: "－";
}

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

.page-about .ab-role ul li {
  position: relative;
  padding-left: 16px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .ab-role ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--amber);
}

.page-about .ab-team__split {
  display: grid;
  gap: 30px;
  align-items: center;
  margin-top: 54px;
}

.page-about .ab-team__sub {
  margin: 0 0 14px;
  font-family: var(--font-head);
  font-size: clamp(20px, 2.6vw, 26px);
  font-weight: 900;
  line-height: 1.32;
  color: var(--ink);
}

.page-about .ab-check {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .ab-check li {
  position: relative;
  padding-left: 22px;
  font-size: 14.5px;
  line-height: 1.75;
  color: #3A4149;
}

.page-about .ab-check li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 10px;
  height: 10px;
  border-radius: 2px;
  background: linear-gradient(135deg, var(--brick), var(--amber));
}

.page-about .ab-check strong {
  display: block;
  margin-bottom: 2px;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--mist);
}

/* ---------- 覆盖规模 ---------- */

.page-about .ab-scale {
  background:
    radial-gradient(700px 400px at 8% -10%, rgba(47, 224, 138, .16), transparent 64%),
    linear-gradient(158deg, #0B2138 0%, var(--harbor) 58%, #143A5C 100%);
  color: var(--paper);
}

.page-about .ab-scale .ab-kicker { color: var(--neon); }
.page-about .ab-scale .ab-h2 { color: var(--paper); }
.page-about .ab-scale .ab-lead { color: rgba(255, 253, 248, .76); }

.page-about .ab-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 42px;
  background: rgba(255, 253, 248, .18);
  border-radius: 18px;
  overflow: hidden;
}

.page-about .ab-metric {
  background: rgba(10, 30, 52, .92);
  padding: 26px 20px;
}

.page-about .ab-metric__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(30px, 5.6vw, 46px);
  font-weight: 700;
  line-height: 1;
  color: var(--neon);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-metric__num small {
  font-family: var(--font-body);
  font-size: .4em;
  font-weight: 600;
  margin-left: 4px;
  color: rgba(255, 253, 248, .72);
}

.page-about .ab-metric__outline {
  color: transparent;
  -webkit-text-stroke: 1.5px var(--amber);
}

.page-about .ab-metric__outline small {
  color: var(--amber);
  -webkit-text-stroke: 0;
}

.page-about .ab-metric__label {
  margin: 12px 0 0;
  font-size: 13.5px;
  line-height: 1.6;
  color: rgba(255, 253, 248, .7);
}

.page-about .ab-band {
  list-style: none;
  display: flex;
  gap: 18px;
  margin: 52px calc(var(--gutter) * -1) 0;
  padding: 20px calc(var(--gutter) + 6px);
  overflow-x: auto;
  background: linear-gradient(90deg, rgba(217, 160, 60, .22), rgba(217, 160, 60, .04));
  border-top: 1px solid rgba(217, 160, 60, .38);
  border-bottom: 1px solid rgba(217, 160, 60, .38);
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-about .ab-band__item {
  flex: 0 0 auto;
  min-width: 168px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-right: 18px;
  border-right: 1px solid rgba(217, 160, 60, .28);
}

.page-about .ab-band__item:last-child {
  border-right: 0;
  padding-right: 0;
}

.page-about .ab-band__k {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--amber);
}

.page-about .ab-band__v {
  font-size: 14.5px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .ab-scale__note {
  margin-top: 34px;
  color: rgba(255, 253, 248, .78);
}

.page-about .ab-body.ab-scale__note a {
  color: var(--neon);
  border-bottom-color: rgba(47, 224, 138, .45);
}

/* ---------- 用户反馈 ---------- */

.page-about .ab-research {
  background: linear-gradient(180deg, var(--sand) 0%, #EFE3D2 100%);
}

.page-about .ab-research__grid {
  display: grid;
  gap: 38px;
  align-items: start;
}

.page-about .ab-quote {
  margin: 26px 0 0;
  padding: 18px 22px;
  border-left: 4px solid var(--brick);
  background: rgba(255, 253, 248, .82);
  border-radius: 0 14px 14px 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: #3A4149;
}

.page-about .ab-quote + .ab-body {
  margin-top: 22px;
}

.page-about .ab-score {
  background: var(--paper);
  border: 1px solid var(--ab-line);
  border-radius: 22px;
  padding: 30px 26px;
  box-shadow: var(--ab-shadow);
}

.page-about .ab-score__label {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .ab-score__num {
  display: block;
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: clamp(46px, 9vw, 68px);
  font-weight: 700;
  line-height: 1;
  color: var(--brick);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-score__of {
  font-size: .38em;
  font-weight: 600;
  margin-left: 4px;
  color: var(--mist);
}

.page-about .ab-score__text {
  margin: 16px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist);
}

.page-about .ab-score__list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--ab-line);
  border-radius: 12px;
  overflow: hidden;
}

.page-about .ab-score__list li {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 14px;
  background: var(--paper);
  font-size: 13.5px;
}

.page-about .ab-score__list li span:first-child {
  color: var(--mist);
}

.page-about .ab-score__val {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--ink);
}

/* ---------- 内容合作 ---------- */

.page-about .ab-partners {
  background:
    radial-gradient(600px 360px at 90% 0%, rgba(217, 160, 60, .28), transparent 66%),
    linear-gradient(150deg, #6E241B 0%, var(--brick) 46%, #93382B 100%);
  color: var(--paper);
}

.page-about .ab-partners .ab-kicker { color: var(--amber); }
.page-about .ab-partners .ab-h2 { color: var(--paper); }
.page-about .ab-partners .ab-lead { color: rgba(255, 253, 248, .82); }

.page-about .ab-coop {
  display: grid;
  gap: 18px;
  margin-top: 42px;
}

.page-about .ab-coop__item {
  background: var(--glass);
  border: 1px solid rgba(255, 253, 248, .22);
  border-radius: 18px;
  padding: 26px 24px;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.page-about .ab-coop__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(34px, 6vw, 48px);
  font-weight: 700;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1.6px var(--paper);
}

.page-about .ab-coop__title {
  margin: 14px 0 8px;
  font-size: 19px;
  font-weight: 800;
  color: var(--paper);
}

.page-about .ab-coop__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(255, 253, 248, .82);
}

.page-about .ab-partners__note {
  margin-top: 30px;
  color: rgba(255, 253, 248, .82);
}

/* ---------- 服务地区 ---------- */

.page-about .ab-region {
  background: var(--paper);
}

.page-about .ab-region__split {
  display: grid;
  gap: 34px;
  align-items: center;
}

.page-about .ab-contact {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .ab-contact li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--ab-line);
  font-size: 15px;
}

.page-about .ab-contact__k {
  min-width: 74px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--mist);
}

.page-about .ab-contact__v {
  font-weight: 700;
  color: var(--ink);
  word-break: break-word;
}

.page-about .ab-region__note {
  margin-top: 22px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 760px) {
  .page-about .ab-team__cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
    gap: 22px;
  }

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

@media (min-width: 900px) {
  .page-about > section {
    padding: 104px 0;
  }

  .page-about .ab-hero {
    padding-top: 46px;
    padding-bottom: 96px;
  }

  .page-about .ab-hero__grid {
    grid-template-columns: 1.5fr .85fr;
    gap: 68px;
  }

  .page-about .ab-timeline__head {
    grid-template-columns: 1.3fr .95fr;
    gap: 60px;
  }

  .page-about .ab-axis::before {
    left: 103px;
  }

  .page-about .ab-axis__item {
    display: grid;
    grid-template-columns: 80px minmax(0, 1fr);
    gap: 48px;
    padding: 0 0 56px 0;
    
  }

  .page-about .ab-axis__item::before {
    left: 95px;
    top: 7px;
  }

  .page-about .ab-axis__year {
    text-align: right;
  }

  .page-about .ab-axis__body {
    margin-top: 0;
  }

  .page-about .ab-team__split {
    grid-template-columns: 5fr 7fr;
    gap: 58px;
    margin-top: 68px;
  }

  .page-about .ab-research__grid {
    grid-template-columns: 7fr 5fr;
    gap: 70px;
  }

  .page-about .ab-region__split {
    grid-template-columns: 6fr 6fr;
    gap: 58px;
  }
}

@media (min-width: 860px) {
  .page-about .ab-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 420px) {
  .page-about .ab-hero__facts {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-about .ab-contact__k {
    min-width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition: none !important;
    animation: none !important;
  }
}