.page-about {
  --ab-gold-glow: rgba(255, 215, 0, 0.14);
  --ab-purple-glow: rgba(138, 43, 226, 0.18);
  --ab-cyan-glow: rgba(0, 229, 255, 0.12);
  position: relative;
  background-color: var(--night);
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 28px 28px;
  overflow-x: hidden;
}

.page-about .breadcrumbs {
  padding-top: 18px;
  position: relative;
  z-index: 2;
}

.page-about .ab-hero {
  position: relative;
  padding: 48px 0 56px;
  border-top: 2px solid var(--gold);
  border-bottom: 1px solid var(--purple);
  background:
    radial-gradient(circle at 85% 10%, rgba(138, 43, 226, 0.25), transparent 340px),
    linear-gradient(120deg, rgba(255, 215, 0, 0.05), transparent 55%),
    var(--deep);
}

.page-about .ab-hero__rail {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, transparent, var(--gold) 35%, var(--purple) 75%, transparent);
  opacity: 0.5;
  pointer-events: none;
}

.page-about .ab-hero__inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}

.page-about .ab-hero__eyebrow {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .ab-hero__title {
  margin: 0 0 20px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(28px, 6vw, 52px);
  line-height: 1.18;
  color: var(--light);
  text-transform: uppercase;
}

.page-about .ab-hero__title span {
  color: var(--gold);
}

.page-about .ab-hero__lead {
  margin: 0;
  max-width: 640px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--pale);
}

.page-about .ab-hero__indices {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  border-top: 1px solid var(--mid);
  max-width: 480px;
}

.page-about .ab-hero__indices li {
  border-bottom: 1px solid var(--mid);
}

.page-about .ab-hero__indices a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 4px;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 14px;
  color: var(--light);
  text-decoration: none;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.page-about .ab-hero__indices a::after {
  content: "↘";
  color: var(--gold);
  flex-shrink: 0;
}

.page-about .ab-hero__indices a:hover {
  color: var(--gold);
  padding-left: 8px;
}

.page-about .ab-hero__side {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-top: 18px;
  border-top: 1px solid var(--mid);
}

.page-about .ab-hero__side-kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--pale);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  white-space: nowrap;
}

.page-about .ab-hero__side-num {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 34px;
  line-height: 1;
  color: rgba(255, 215, 0, 0.25);
  text-shadow: 0 0 28px rgba(255, 215, 0, 0.25);
}

.page-about .ab-hero__side-desc {
  margin: 0;
  font-size: 12px;
  line-height: 1.5;
  color: var(--pale);
}

.page-about .ab-section {
  padding: 64px 0 40px;
  scroll-margin-top: 84px;
}

.page-about .ab-section__head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 32px;
  padding-left: 14px;
  border-left: 3px solid var(--gold);
}

.page-about .ab-section__head--vision {
  border-left-color: var(--purple);
}

.page-about .ab-section__index {
  margin-top: 2px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.1;
  color: var(--gold);
  opacity: 0.9;
}

.page-about .ab-section__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(26px, 4vw, 34px);
  line-height: 1.2;
  color: var(--light);
}

.page-about .ab-section__subtitle {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--pale);
}

/* 品牌概述 */
.page-about .ab-overview__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  align-items: center;
}

.page-about .ab-overview__media-wrap {
  position: relative;
}

.page-about .ab-overview__media-wrap::before {
  content: "";
  position: absolute;
  inset: 14px -14px -14px 14px;
  border: 1px solid var(--gold);
  border-radius: 14px;
  z-index: 0;
  opacity: 0.7;
}

.page-about .ab-overview__media {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--mid);
  border-radius: 14px;
  object-fit: cover;
  background-color: var(--deep);
}

.page-about .ab-overview__body p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--light);
}

.page-about .ab-overview__points {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .ab-overview__points li {
  background: var(--deep);
  border: 1px solid var(--mid);
  border-left: 3px solid var(--purple);
  border-radius: 8px;
  padding: 12px 14px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--pale);
}

.page-about .ab-overview__points strong {
  color: var(--gold);
  font-weight: 600;
  margin-right: 4px;
}

.page-about .ab-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 48px;
}

.page-about .ab-stats__item {
  background: var(--deep);
  border: 1px solid var(--mid);
  border-radius: 10px;
  padding: 18px 12px;
  text-align: center;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

.page-about .ab-stats__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 26px;
  line-height: 1.2;
  color: var(--gold);
}

.page-about .ab-stats__label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--pale);
}

/* 发展历程 */
.page-about .ab-milestones__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
}

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

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

.page-about .ab-timeline::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 12px;
  width: 3px;
  border-radius: 3px;
  background: linear-gradient(180deg, var(--gold), var(--purple), var(--cyan));
}

.page-about .ab-timeline__item {
  position: relative;
  padding: 0 0 28px 26px;
}

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

.page-about .ab-timeline__item::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 6px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--night);
  border: 3px solid var(--gold);
  box-shadow: 0 0 10px rgba(255, 215, 0, 0.5);
  z-index: 1;
}

.page-about .ab-timeline__year {
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 26px;
  line-height: 1;
  color: var(--cyan);
}

.page-about .ab-timeline__card {
  background: var(--deep);
  border: 1px solid var(--mid);
  border-radius: 10px;
  padding: 12px 16px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.page-about .ab-timeline__card:hover {
  border-color: var(--purple);
}

.page-about .ab-timeline__card[open] {
  border-color: var(--gold);
  box-shadow: 0 0 24px var(--ab-gold-glow);
}

.page-about .ab-timeline__card summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  cursor: pointer;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 17px;
  line-height: 1.4;
  color: var(--light);
}

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

.page-about .ab-timeline__hint {
  flex-shrink: 0;
  padding: 2px 8px;
  border: 1px solid var(--mid);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  color: var(--pale);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-about .ab-timeline__card[open] .ab-timeline__hint {
  color: var(--gold);
  border-color: var(--gold);
}

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

.page-about .ab-milestones__media {
  margin-top: 40px;
  max-width: 820px;
  border: 1px solid var(--mid);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.35);
}

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

/* 资质认证 */
.page-about .ab-cert__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-about .ab-cert__card {
  position: relative;
  overflow: hidden;
  background: var(--deep);
  border: 1px solid var(--mid);
  border-radius: 14px;
  padding: 28px 24px;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.page-about .ab-cert__card:hover {
  transform: translateY(-2px);
}

.page-about .ab-cert__card::after {
  content: "";
  position: absolute;
  right: -48px;
  top: -48px;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: var(--ab-gold-glow);
  pointer-events: none;
}

.page-about .ab-cert__card--iso {
  border-top: 3px solid var(--gold);
}

.page-about .ab-cert__card--award {
  border-top: 3px solid var(--purple);
}

.page-about .ab-cert__card--domain {
  border-top: 3px solid var(--cyan);
}

.page-about .ab-cert__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  margin-bottom: 18px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--gold), var(--purple));
  color: var(--night);
}

.page-about .ab-cert__title {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 19px;
  line-height: 1.4;
  color: var(--light);
}

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

/* 团队与生态 */
.page-about .ab-team__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  align-items: center;
}

.page-about .ab-team__content p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--light);
}

.page-about .ab-team__categories {
  list-style: none;
  margin: 24px 0 28px;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .ab-team__categories li {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  background: var(--night);
  border: 1px solid var(--mid);
  border-radius: 12px;
  padding: 14px 16px;
}

.page-about .ab-team__categories span {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 15px;
  color: var(--gold);
}

.page-about .ab-team__categories i {
  font-style: normal;
  font-size: 13px;
  line-height: 1.7;
  color: var(--pale);
}

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

.page-about .ab-team__media {
  border: 1px solid var(--mid);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 14px 44px rgba(0, 0, 0, 0.38);
}

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

/* 品牌愿景 */
.page-about .ab-vision {
  margin-top: 24px;
  padding: 64px 0 72px;
  background:
    radial-gradient(circle at 12% 20%, rgba(138, 43, 226, 0.3), transparent 320px),
    linear-gradient(120deg, rgba(255, 215, 0, 0.05), transparent 50%),
    var(--deep);
  border-top: 2px solid var(--gold);
  border-bottom: 2px solid var(--purple);
}

.page-about .ab-vision__inner {
  position: relative;
}

.page-about .ab-vision__deco {
  position: absolute;
  right: -24px;
  top: -48px;
  width: 180px;
  height: 180px;
  border: 1px solid rgba(138, 43, 226, 0.45);
  background: radial-gradient(circle, rgba(138, 43, 226, 0.16), transparent 70%);
  transform: rotate(45deg);
  border-radius: 18px;
  pointer-events: none;
}

.page-about .ab-vision__content {
  position: relative;
  z-index: 1;
  max-width: 820px;
}

.page-about .ab-vision__lead {
  margin: 0;
  max-width: 720px;
  font-size: 17px;
  line-height: 1.85;
  color: var(--light);
}

.page-about .ab-vision__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .ab-vision__tags a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 14px;
  color: var(--light);
  text-decoration: none;
  background: var(--night);
  border: 1px solid var(--mid);
  border-radius: 8px;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.page-about .ab-vision__tags a::after {
  content: "→";
  color: var(--gold);
  transition: transform 0.2s ease;
}

.page-about .ab-vision__tags a:hover {
  color: var(--gold);
  border-color: var(--gold);
}

.page-about .ab-vision__tags a:hover::after {
  transform: translateX(4px);
}

/* 桌面端增强 */
@media (min-width: 640px) {
  .page-about .ab-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .ab-hero__side {
    border-top: none;
    padding-top: 0;
  }
}

@media (min-width: 768px) {
  .page-about .ab-overview__grid {
    grid-template-columns: minmax(0, 420px) minmax(0, 1fr);
    gap: 44px;
  }

  .page-about .ab-team__layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 380px);
    gap: 44px;
  }
}

@media (min-width: 1024px) {
  .page-about .ab-hero {
    padding: 64px 0 72px;
  }

  .page-about .ab-hero__inner {
    grid-template-columns: minmax(0, 1fr) 180px;
    gap: 48px;
    align-items: end;
  }

  .page-about .ab-hero__side {
    display: block;
    text-align: right;
    border-right: 2px solid var(--gold);
    padding-right: 20px;
  }

  .page-about .ab-hero__side-kicker {
    margin-bottom: 8px;
  }

  .page-about .ab-hero__side-num {
    font-size: 76px;
    margin-bottom: 8px;
  }

  .page-about .ab-section {
    padding: 84px 0 56px;
  }

  .page-about .ab-stats {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .ab-milestones__layout {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 32px;
  }

  .page-about .ab-milestones__side {
    display: block;
  }

  .page-about .ab-milestones__side-note {
    margin: 0 0 18px;
    font-family: var(--font-mono);
    font-size: 13px;
    line-height: 1.7;
    color: var(--pale);
  }

  .page-about .ab-milestones__map {
    display: flex;
    flex-direction: column;
    border-left: 1px dashed var(--mid);
    padding-left: 14px;
  }

  .page-about .ab-milestones__map span {
    padding: 8px 0;
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--pale);
    border-bottom: 1px solid var(--mid);
  }

  .page-about .ab-milestones__map span:last-child {
    border-bottom: none;
  }

  .page-about .ab-timeline__card summary {
    font-size: 18px;
  }

  .page-about .ab-vision {
    padding: 80px 0 88px;
  }

  .page-about .ab-vision__lead {
    font-size: 18px;
  }
}