.page-about {
  --ab-hair: rgba(30, 58, 110, 0.6);
  --ab-hair-strong: rgba(47, 243, 224, 0.4);
  --ab-card: linear-gradient(158deg, rgba(18, 32, 64, 0.92) 0%, rgba(5, 11, 24, 0.94) 100%);
  position: relative;
  overflow-x: clip;
  background:
    radial-gradient(1080px 520px at 8% -8%, rgba(47, 243, 224, 0.09), transparent 62%),
    radial-gradient(880px 460px at 98% 2%, rgba(108, 99, 255, 0.13), transparent 58%),
    var(--kx-void);
  color: var(--kx-ink);
  font-family: var(--kx-font-body);
}

.page-about .ab-crumb {
  padding-top: 22px;
}

/* ---------- 首屏 ---------- */

.page-about .ab-hero {
  display: grid;
  gap: 32px;
  padding-top: 22px;
  padding-bottom: 44px;
}

.page-about .ab-hero h1 {
  margin: 16px 0 18px;
  max-width: 15em;
  font-family: var(--kx-font-display);
  font-weight: 900;
  font-size: clamp(30px, 5.6vw, 56px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--kx-ink);
}

.page-about .ab-hero__lead {
  margin: 0;
  max-width: 36em;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--kx-mute);
}

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

.page-about .ab-hero__fig {
  position: relative;
  margin: 0;
  border: 1px solid var(--ab-hair);
  border-radius: var(--kx-radius);
  overflow: hidden;
  box-shadow: var(--kx-shadow);
}

.page-about .ab-hero__fig::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(150deg, rgba(47, 243, 224, 0.1) 0%, transparent 42%, rgba(108, 99, 255, 0.16) 100%);
}

.page-about .ab-hero__fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
}

@media (min-width: 900px) {
  .page-about .ab-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 52px;
    align-items: center;
    padding-top: 40px;
    padding-bottom: 72px;
  }
}

/* ---------- 数据条 ---------- */

.page-about .ab-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 26px;
  border: 1px solid var(--ab-hair);
  border-radius: var(--kx-radius);
  overflow: hidden;
  background: var(--ab-hair);
}

.page-about .ab-stat {
  padding: 22px 18px;
  background: var(--kx-deep);
  transition: background 220ms var(--kx-ease);
}

.page-about .ab-stat:hover {
  background: var(--kx-panel);
}

.page-about .ab-stat__num {
  display: inline-block;
  font-family: var(--kx-font-mono);
  font-size: clamp(28px, 3.4vw, 40px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--kx-cyan);
}

.page-about .ab-stat__unit {
  margin-left: 5px;
  font-family: var(--kx-font-mono);
  font-size: 13px;
  color: var(--kx-cyan);
  opacity: 0.75;
}

.page-about .ab-stat__label {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--kx-mute);
}

@media (min-width: 780px) {
  .page-about .ab-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 章节骨架 ---------- */

.page-about .ab-sec {
  position: relative;
  padding-block: 64px;
}

.page-about .ab-sec::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--kx-cyan) 0%, rgba(47, 243, 224, 0.14) 42%, rgba(30, 58, 110, 0.4) 100%);
}

.page-about .ab-sec .kx-sec-head {
  max-width: 64em;
  margin-bottom: 28px;
}

@media (min-width: 900px) {
  .page-about .ab-sec {
    padding-block: 96px;
  }
  .page-about .ab-sec .kx-sec-head {
    margin-bottom: 40px;
  }
}

/* ---------- 01 我们在做什么 ---------- */

.page-about .ab-what {
  display: grid;
  gap: 30px;
}

.page-about .ab-what__body p {
  margin: 0 0 18px;
  max-width: 40em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--kx-mute);
}

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

.page-about .ab-what__aside {
  align-self: start;
  padding: 24px 22px;
  border: 1px solid var(--ab-hair);
  border-radius: var(--kx-radius);
  background: var(--ab-card);
}

.page-about .ab-what__aside-title {
  margin: 0;
  font-family: var(--kx-font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--kx-cyan);
}

.page-about .ab-track {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .ab-track li {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding-bottom: 13px;
  border-bottom: 1px solid var(--ab-hair);
  font-size: 14px;
  line-height: 1.65;
  color: var(--kx-ink);
}

.page-about .ab-track li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .ab-track__n {
  font-family: var(--kx-font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--kx-cyan);
}

@media (min-width: 980px) {
  .page-about .ab-what {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 48px;
  }
}

/* ---------- 02 发展历程 ---------- */

.page-about .ab-tl-band {
  margin: 0 0 28px;
  border: 1px solid var(--ab-hair);
  border-radius: var(--kx-radius);
  overflow: hidden;
}

.page-about .ab-tl-band img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 12 / 7;
  object-fit: cover;
}

.page-about .ab-tl {
  display: flex;
  gap: 16px;
  padding-bottom: 16px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--kx-line) transparent;
}

.page-about .ab-tl::-webkit-scrollbar {
  height: 6px;
}

.page-about .ab-tl::-webkit-scrollbar-track {
  background: rgba(30, 58, 110, 0.35);
}

.page-about .ab-tl::-webkit-scrollbar-thumb {
  background: var(--kx-line);
}

.page-about .ab-stage {
  position: relative;
  flex: 0 0 76%;
  scroll-snap-align: start;
  padding: 24px 20px 28px;
  border: 1px solid var(--ab-hair);
  border-radius: var(--kx-radius);
  background: var(--ab-card);
  transition: border-color 180ms var(--kx-ease), transform 180ms var(--kx-ease), box-shadow 180ms var(--kx-ease);
}

.page-about .ab-stage:hover {
  border-color: var(--kx-cyan);
  transform: translateY(-2px);
  box-shadow: 0 0 0 1px rgba(47, 243, 224, 0.18), var(--kx-shadow);
}

.page-about .ab-stage__num {
  display: block;
  font-family: var(--kx-font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--kx-cyan);
}

.page-about .ab-stage h3 {
  margin: 12px 0 10px;
  font-family: var(--kx-font-display);
  font-weight: 800;
  font-size: 18px;
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--kx-ink);
}

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

.page-about .ab-stage::after {
  content: "";
  position: absolute;
  left: 20px;
  right: 20px;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--kx-cyan), transparent);
  opacity: 0.4;
  transition: opacity 180ms var(--kx-ease);
}

.page-about .ab-stage:hover::after {
  opacity: 1;
}

@media (min-width: 720px) {
  .page-about .ab-stage {
    flex: 0 0 296px;
  }
}

/* ---------- 03 团队 ---------- */

.page-about .ab-team {
  display: grid;
  gap: 34px;
}

.page-about .ab-ring {
  display: grid;
  gap: 22px;
  justify-items: center;
}

.page-about .ab-ring__wrap {
  position: relative;
  width: 190px;
  height: 190px;
}

.page-about .ab-ring__chart {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: conic-gradient(
    var(--kx-cyan) 0 26.1%,
    var(--kx-violet) 26.1% 47.8%,
    var(--kx-orange) 47.8% 82.6%,
    var(--kx-lime) 82.6% 100%
  );
  -webkit-mask: radial-gradient(circle at 50% 50%, transparent 0 45%, #000 46%);
  mask: radial-gradient(circle at 50% 50%, transparent 0 45%, #000 46%);
}

.page-about .ab-ring__center {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  text-align: center;
  font-family: var(--kx-font-mono);
  color: var(--kx-ink);
  line-height: 1;
}

.page-about .ab-ring__center b {
  display: block;
  font-size: 34px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.page-about .ab-ring__center em {
  display: block;
  margin-top: 6px;
  font-style: normal;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--kx-mute);
}

.page-about .ab-ring__legend {
  list-style: none;
  width: 100%;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .ab-role {
  padding: 12px 14px;
  border: 1px solid var(--ab-hair);
  border-radius: var(--kx-radius);
  background: rgba(10, 20, 40, 0.55);
  transition: border-color 200ms var(--kx-ease), background 200ms var(--kx-ease);
}

.page-about .ab-role:hover {
  border-color: var(--ab-hair-strong);
  background: rgba(18, 32, 64, 0.78);
}

.page-about .ab-role__head {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--kx-ink);
}

.page-about .ab-role__dot {
  flex: none;
  width: 9px;
  height: 9px;
  border-radius: 50%;
}

.page-about .ab-role:nth-child(1) .ab-role__dot { background: var(--kx-cyan); }
.page-about .ab-role:nth-child(2) .ab-role__dot { background: var(--kx-violet); }
.page-about .ab-role:nth-child(3) .ab-role__dot { background: var(--kx-orange); }
.page-about .ab-role:nth-child(4) .ab-role__dot { background: var(--kx-lime); }

.page-about .ab-role__name {
  font-weight: 600;
}

.page-about .ab-role__count {
  margin-left: auto;
  font-family: var(--kx-font-mono);
  font-size: 13px;
  color: var(--kx-cyan);
}

.page-about .ab-role__desc {
  margin: 0;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--kx-mute);
  transition: max-height 240ms var(--kx-ease), opacity 240ms var(--kx-ease), margin-top 240ms var(--kx-ease);
}

.page-about .ab-role:hover .ab-role__desc,
.page-about .ab-role:focus-within .ab-role__desc {
  max-height: 150px;
  margin-top: 9px;
  opacity: 1;
}

.page-about .ab-team__fig {
  margin: 0;
  border: 1px solid var(--ab-hair);
  border-radius: var(--kx-radius);
  overflow: hidden;
  background: var(--kx-deep);
}

.page-about .ab-team__fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .ab-team__fig figcaption {
  padding: 14px 16px;
  border-top: 1px solid var(--ab-hair);
  font-size: 13px;
  line-height: 1.7;
  color: var(--kx-mute);
}

@media (min-width: 940px) {
  .page-about .ab-team {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    gap: 52px;
    align-items: start;
  }
}

/* ---------- 04 合作生态 ---------- */

.page-about .ab-eco {
  display: grid;
  gap: 34px;
}

.page-about .ab-eco__stage {
  padding: 8px;
  border: 1px solid var(--ab-hair);
  border-radius: var(--kx-radius);
  background: radial-gradient(620px 320px at 50% 50%, rgba(18, 32, 64, 0.85), rgba(5, 11, 24, 0.6));
}

.page-about .ab-eco__svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .ab-eco__link {
  stroke: url(#abEcoLine);
  stroke-width: 1;
  opacity: 0.45;
  transition: opacity 200ms var(--kx-ease), stroke-width 200ms var(--kx-ease);
}

.page-about .ab-eco__node:hover .ab-eco__link {
  opacity: 1;
  stroke-width: 2;
}

.page-about .ab-eco__dot {
  fill: var(--kx-deep);
  stroke: var(--kx-line);
  stroke-width: 1;
  transition: stroke 200ms var(--kx-ease), fill 200ms var(--kx-ease);
}

.page-about .ab-eco__node:hover .ab-eco__dot {
  stroke: var(--kx-cyan);
  fill: rgba(47, 243, 224, 0.16);
}

.page-about .ab-eco__label {
  font-family: var(--kx-font-body);
  font-size: 13px;
  fill: var(--kx-mute);
  transition: fill 200ms var(--kx-ease);
}

.page-about .ab-eco__node:hover .ab-eco__label {
  fill: var(--kx-ink);
}

.page-about .ab-eco__core-ring {
  fill: rgba(18, 32, 64, 0.92);
  stroke: var(--kx-cyan);
  stroke-width: 1.5;
}

.page-about .ab-eco__core {
  font-family: var(--kx-font-display);
  font-weight: 900;
  font-size: 15px;
  letter-spacing: -0.02em;
  fill: var(--kx-ink);
}

.page-about .ab-eco__body p {
  margin: 0 0 18px;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--kx-mute);
}

.page-about .ab-awards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(132px, 1fr));
  gap: 12px;
  margin-top: 4px;
}

.page-about .ab-badge {
  padding: 16px 14px;
  border: 1px solid var(--ab-hair);
  border-radius: var(--kx-radius);
  background: rgba(10, 20, 40, 0.5);
  transition: border-color 180ms var(--kx-ease), transform 180ms var(--kx-ease);
}

.page-about .ab-badge:hover {
  border-color: var(--kx-cyan);
  transform: translateY(-2px);
}

.page-about .ab-badge__seal {
  display: inline-block;
  padding: 3px 10px;
  border: 1px solid var(--ab-hair-strong);
  border-radius: 999px;
  font-family: var(--kx-font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--kx-cyan);
}

.page-about .ab-badge__title {
  margin: 12px 0 6px;
  font-size: 13.5px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--kx-ink);
}

.page-about .ab-badge__desc {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--kx-mute);
}

@media (min-width: 940px) {
  .page-about .ab-eco {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: 48px;
    align-items: center;
  }
}

/* ---------- 05 服务与联系 ---------- */

.page-about .ab-promise {
  display: grid;
  gap: 18px;
}

.page-about .ab-promise__card {
  position: relative;
  padding: 26px 24px;
  border: 1px solid var(--ab-hair);
  border-radius: var(--kx-radius);
  background: var(--ab-card);
  transition: border-color 180ms var(--kx-ease);
}

.page-about .ab-promise__card:hover {
  border-color: var(--ab-hair-strong);
}

.page-about .ab-promise__k {
  margin: 0 0 12px;
  font-family: var(--kx-font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--kx-cyan);
}

.page-about .ab-promise__card h3 {
  margin: 0 0 12px;
  font-family: var(--kx-font-display);
  font-weight: 800;
  font-size: 19px;
  line-height: 1.45;
  letter-spacing: -0.01em;
  color: var(--kx-ink);
}

.page-about .ab-promise__card p {
  margin: 0 0 16px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--kx-mute);
}

.page-about .ab-link {
  display: inline-block;
  font-size: 13.5px;
  color: var(--kx-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 243, 224, 0.3);
  padding-bottom: 2px;
  transition: border-color 180ms var(--kx-ease), color 180ms var(--kx-ease);
}

.page-about .ab-link:hover {
  color: var(--kx-ink);
  border-bottom-color: var(--kx-ink);
}

.page-about .ab-contact {
  margin-top: 26px;
  padding: 26px 24px;
  border: 1px solid var(--ab-hair);
  border-left: 2px solid var(--kx-orange);
  border-radius: var(--kx-radius);
  background: linear-gradient(120deg, rgba(255, 122, 26, 0.07) 0%, rgba(5, 11, 24, 0.9) 46%, rgba(18, 32, 64, 0.7) 100%);
}

.page-about .ab-contact__lead {
  margin: 0 0 18px;
  font-family: var(--kx-font-display);
  font-weight: 800;
  font-size: 17px;
  color: var(--kx-ink);
}

.page-about .ab-contact__list {
  margin: 0;
  display: grid;
  gap: 1px;
  background: var(--ab-hair);
  border: 1px solid var(--ab-hair);
  border-radius: var(--kx-radius);
  overflow: hidden;
}

.page-about .ab-contact__row {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 14px;
  padding: 13px 16px;
  background: var(--kx-deep);
}

.page-about .ab-contact__row dt {
  font-family: var(--kx-font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--kx-mute);
  align-self: center;
}

.page-about .ab-contact__row dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--kx-ink);
  word-break: break-word;
}

.page-about .ab-contact__note {
  margin: 16px 0 0;
  max-width: 52em;
  font-size: 13px;
  line-height: 1.75;
  color: var(--kx-mute);
}

.page-about .ab-contact__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

@media (min-width: 820px) {
  .page-about .ab-promise {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
  }
  .page-about .ab-promise__card:first-child {
    margin-top: 0;
  }
  .page-about .ab-promise__card:last-child {
    margin-top: 28px;
  }
}

@media (max-width: 520px) {
  .page-about .ab-contact__row {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }
  .page-about .ab-tl-band img {
    aspect-ratio: 16 / 9;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-stage,
  .page-about .ab-role,
  .page-about .ab-badge,
  .page-about .ab-stat,
  .page-about .ab-link,
  .page-about .ab-promise__card,
  .page-about .ab-eco__link,
  .page-about .ab-eco__dot {
    transition: none;
  }
  .page-about .ab-stage:hover,
  .page-about .ab-badge:hover {
    transform: none;
  }
}