.page-about {
  --ab-grid-line: rgba(0, 194, 255, 0.09);
  --ab-card-shadow: 10px 10px 0 rgba(0, 194, 255, 0.1);
  background-color: var(--boo-ice);
  color: var(--boo-ink);
  overflow-x: hidden;
}

/* ===== 通用标签 ===== */
.ab-eyebrow {
  display: inline-block;
  font-family: var(--boo-font-num);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--boo-blue);
  background: rgba(0, 194, 255, 0.07);
  border: 1px solid rgba(0, 194, 255, 0.25);
  padding: 4px 12px;
  margin: 0 0 20px;
}

/* ===== 面包屑 ===== */
.ab-breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--boo-font-num);
  font-size: 13px;
}
.ab-breadcrumb li {
  display: flex;
  align-items: center;
  gap: 8px;
  color: rgba(240, 247, 255, 0.62);
}
.ab-breadcrumb li:not(:last-child)::after {
  content: "/";
  color: rgba(240, 247, 255, 0.35);
}
.ab-breadcrumb a {
  color: var(--boo-blue);
  text-decoration: none;
}
.ab-breadcrumb a:hover {
  color: var(--boo-orange);
}
.ab-breadcrumb li[aria-current="page"] {
  color: var(--boo-ice);
}

/* ===== HERO ===== */
.ab-hero {
  position: relative;
  min-height: 620px;
  display: flex;
  align-items: center;
  padding: 80px 0 72px;
  background: var(--boo-night);
  color: var(--boo-ice);
  overflow: hidden;
}
.ab-hero__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.32;
}
.ab-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(10, 27, 42, 0.96) 0%, rgba(10, 27, 42, 0.72) 46%, rgba(0, 194, 255, 0.2) 100%);
  z-index: 1;
}
.ab-hero::before {
  content: "";
  position: absolute;
  width: 360px;
  height: 280px;
  right: -60px;
  bottom: -60px;
  background: repeating-linear-gradient(135deg, rgba(0, 194, 255, 0.14) 0 2px, transparent 2px 12px);
  clip-path: polygon(0 0, 100% 0, 100% 100%);
  z-index: 2;
  pointer-events: none;
}
.ab-hero .boo-container {
  position: relative;
  z-index: 3;
  width: 100%;
}
.ab-hero__content {
  display: grid;
  gap: 44px;
  margin-top: 56px;
}
.ab-hero__text {
  max-width: 680px;
}
.ab-hero__eyebrow {
  font-family: var(--boo-font-num);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--boo-blue);
  text-transform: uppercase;
  margin: 0 0 20px;
}
.ab-hero__title {
  font-family: var(--boo-font-head);
  font-weight: 900;
  font-size: clamp(38px, 6vw, 72px);
  line-height: 1.08;
  transform: skewX(-6deg);
  margin: 0 0 22px;
  color: var(--boo-ice);
  letter-spacing: 0.01em;
}
.ab-hero__title::after {
  content: "";
  display: inline-block;
  width: 10px;
  height: 0.38em;
  margin-left: 14px;
  background: var(--boo-orange);
}
.ab-hero__lead {
  font-size: 17px;
  line-height: 1.85;
  max-width: 540px;
  color: rgba(240, 247, 255, 0.82);
  margin: 0;
}
.ab-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 30px;
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid rgba(0, 194, 255, 0.28);
  font-family: var(--boo-font-num);
  font-size: 13px;
  font-weight: 700;
  color: var(--boo-blue);
}
.ab-hero__meta span::before {
  content: "◆ ";
  color: var(--boo-orange);
  font-size: 9px;
}
.ab-hero__side {
  background: rgba(10, 27, 42, 0.64);
  border: 1px solid rgba(0, 194, 255, 0.28);
  padding: 20px;
  align-self: end;
}
.ab-hero__side-label {
  font-family: var(--boo-font-num);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: rgba(240, 247, 255, 0.55);
  margin: 0 0 16px;
}
.ab-hero__index {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}
.ab-hero__index-item {
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(0, 194, 255, 0.06);
  border: 1px solid rgba(0, 194, 255, 0.2);
  padding: 12px 14px;
  text-decoration: none;
  color: var(--boo-ice);
  transition: background 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
}
.ab-hero__index-item:hover {
  background: rgba(0, 194, 255, 0.14);
  border-color: var(--boo-blue);
  transform: translateY(-2px);
}
.ab-hero__index-num {
  font-family: var(--boo-font-num);
  font-size: 18px;
  font-weight: 700;
  color: var(--boo-orange);
}
.ab-hero__index-text {
  font-size: 14px;
  font-weight: 700;
}

/* ===== ORIGIN ===== */
.ab-origin {
  padding: 88px 0;
  background-color: var(--boo-ice);
  background-image:
    linear-gradient(var(--ab-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--ab-grid-line) 1px, transparent 1px);
  background-size: 40px 40px;
}
.ab-origin__grid {
  display: grid;
  gap: 48px;
}
.ab-origin__title {
  font-family: var(--boo-font-head);
  font-weight: 900;
  font-size: clamp(26px, 3vw, 38px);
  line-height: 1.25;
  transform: skewX(-6deg);
  margin: 0 0 20px;
}
.ab-origin__lead {
  font-size: 15px;
  line-height: 1.9;
  color: var(--boo-ink);
  margin: 0 0 16px;
}
.ab-origin__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 28px;
}
.ab-origin__stat {
  background: #fff;
  border: 1px solid var(--boo-line);
  border-top: 3px solid var(--boo-blue);
  padding: 16px 12px;
}
.ab-origin__stat-num {
  display: block;
  font-family: var(--boo-font-num);
  font-size: 26px;
  font-weight: 700;
  color: var(--boo-ink);
  line-height: 1.2;
}
.ab-origin__stat-label {
  display: block;
  font-size: 12px;
  color: var(--boo-gray);
  margin-top: 6px;
}
.ab-origin__chart {
  margin: 0;
  position: relative;
  background: #fff;
  border: 1px solid var(--boo-line);
  padding: 10px 10px 0;
}
.ab-origin__chart img {
  display: block;
  width: 100%;
  height: auto;
}
.ab-origin__chart figcaption {
  font-family: var(--boo-font-num);
  font-size: 12px;
  color: var(--boo-gray);
  padding: 12px 4px 14px;
}

/* ===== TIMELINE ===== */
.ab-timeline-section {
  padding: 88px 0;
  background: #fff;
}
.ab-timeline-section__header {
  max-width: 620px;
  margin-bottom: 56px;
}
.ab-timeline-section__title {
  font-family: var(--boo-font-head);
  font-weight: 900;
  font-size: clamp(26px, 3vw, 38px);
  line-height: 1.25;
  transform: skewX(-6deg);
  margin: 0 0 14px;
}
.ab-timeline-section__lead {
  color: var(--boo-gray);
  font-size: 15px;
  line-height: 1.8;
  margin: 0;
}
.ab-timeline {
  position: relative;
  padding-left: 64px;
}
.ab-timeline::before {
  content: "";
  position: absolute;
  left: 20px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(to bottom, var(--boo-blue) 0%, var(--boo-green) 60%, var(--boo-gold) 100%);
}
.ab-timeline__item {
  position: relative;
  margin-bottom: 32px;
}
.ab-timeline__item:last-child {
  margin-bottom: 0;
}
.ab-timeline__marker {
  position: absolute;
  left: 20px;
  top: 0;
  width: 42px;
  height: 42px;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--boo-night);
  border: 2px solid var(--boo-blue);
  color: var(--boo-ice);
  font-family: var(--boo-font-num);
  font-size: 13px;
  font-weight: 700;
  z-index: 2;
}
.ab-timeline__card {
  position: relative;
  background: #fff;
  border: 1px solid var(--boo-line);
  border-left: 4px solid var(--boo-blue);
  padding: 22px 24px;
  transition: box-shadow 0.25s ease, transform 0.25s ease, border-color 0.25s ease;
}
.ab-timeline__card::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 21px;
  width: 27px;
  height: 2px;
  background: var(--boo-blue);
}
.ab-timeline__card:hover {
  transform: translateX(4px);
  box-shadow: var(--ab-card-shadow);
}
.ab-timeline__season {
  display: inline-block;
  font-family: var(--boo-font-num);
  font-size: 12px;
  font-weight: 700;
  color: var(--boo-orange);
  letter-spacing: 0.06em;
  border: 1px solid rgba(255, 90, 54, 0.35);
  background: rgba(255, 90, 54, 0.06);
  padding: 2px 8px;
  margin-bottom: 12px;
}
.ab-timeline__title {
  font-family: var(--boo-font-head);
  font-size: 20px;
  font-weight: 900;
  margin: 0 0 8px;
}
.ab-timeline__desc {
  font-size: 14px;
  line-height: 1.8;
  color: var(--boo-ink);
  margin: 0;
}

/* ===== PHILOSOPHY ===== */
.ab-philosophy {
  position: relative;
  padding: 88px 0;
  background: var(--boo-night);
  color: var(--boo-ice);
  overflow: hidden;
}
.ab-philosophy::before {
  content: "一步到位";
  position: absolute;
  right: -30px;
  bottom: -50px;
  font-family: var(--boo-font-head);
  font-weight: 900;
  font-size: clamp(90px, 16vw, 180px);
  line-height: 1;
  color: rgba(0, 194, 255, 0.05);
  transform: skewX(-6deg);
  white-space: nowrap;
  pointer-events: none;
}
.ab-philosophy .ab-eyebrow {
  color: var(--boo-orange);
  border-color: rgba(255, 90, 54, 0.4);
  background: rgba(255, 90, 54, 0.08);
}
.ab-philosophy__heading {
  font-family: var(--boo-font-head);
  font-weight: 900;
  font-size: clamp(28px, 3.4vw, 42px);
  line-height: 1.2;
  transform: skewX(-6deg);
  margin: 20px 0 14px;
}
.ab-philosophy__lead {
  font-size: 16px;
  line-height: 1.8;
  max-width: 620px;
  color: rgba(240, 247, 255, 0.76);
  margin: 0;
}
.ab-philosophy__grid {
  display: grid;
  gap: 16px;
  margin-top: 48px;
}
.ab-philosophy__item {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 200px;
  background: rgba(0, 194, 255, 0.07);
  border: 1px solid rgba(0, 194, 255, 0.28);
  padding: 32px 24px;
}
.ab-philosophy__item::after {
  content: "";
  position: absolute;
  right: 0;
  top: 0;
  width: 42px;
  height: 4px;
  background: var(--boo-orange);
}
.ab-philosophy__num {
  font-family: var(--boo-font-num);
  font-size: 18px;
  font-weight: 700;
  color: var(--boo-orange);
}
.ab-philosophy__title {
  font-family: var(--boo-font-head);
  font-size: 19px;
  font-weight: 900;
  margin: 20px 0 10px;
}
.ab-philosophy__desc {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(240, 247, 255, 0.78);
  margin: 0;
}

/* ===== CERT ===== */
.ab-cert-section {
  padding: 88px 0;
  background: var(--boo-ice);
}
.ab-cert-section__grid {
  display: grid;
  gap: 48px;
}
.ab-cert-section__title {
  font-family: var(--boo-font-head);
  font-weight: 900;
  font-size: clamp(26px, 3vw, 38px);
  transform: skewX(-6deg);
  margin: 0 0 12px;
}
.ab-cert-section__lead {
  color: var(--boo-gray);
  line-height: 1.8;
  max-width: 520px;
  margin: 0 0 32px;
}
.ab-cert__list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}
.ab-cert__item {
  background: #fff;
  border: 1px solid var(--boo-line);
  border-top: 4px solid var(--boo-blue);
  padding: 22px;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.ab-cert__item:hover {
  transform: translateY(-4px);
  box-shadow: 8px 8px 0 rgba(0, 194, 255, 0.12);
}
.ab-cert__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: var(--boo-night);
  color: var(--boo-blue);
  font-family: var(--boo-font-num);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  margin-bottom: 16px;
}
.ab-cert__title {
  font-size: 16px;
  font-weight: 700;
  margin: 0 0 8px;
}
.ab-cert__desc {
  font-size: 13px;
  line-height: 1.7;
  color: var(--boo-gray);
  margin: 0;
}
.ab-cert__figure {
  margin: 0;
  align-self: start;
  background: #fff;
  border: 1px solid var(--boo-line);
  padding: 10px;
}
.ab-cert__figure img {
  display: block;
  width: 100%;
  height: auto;
}
.ab-cert__figure figcaption {
  font-family: var(--boo-font-num);
  font-size: 12px;
  color: var(--boo-gray);
  padding: 12px 4px 4px;
}

/* ===== TEAM ===== */
.ab-team {
  padding: 88px 0;
  background-color: var(--boo-ice);
  background-image:
    linear-gradient(var(--ab-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--ab-grid-line) 1px, transparent 1px);
  background-size: 32px 32px;
}
.ab-team__title {
  font-family: var(--boo-font-head);
  font-weight: 900;
  font-size: clamp(26px, 3vw, 38px);
  transform: skewX(-6deg);
  margin: 0 0 12px;
}
.ab-team__lead {
  color: var(--boo-gray);
  max-width: 640px;
  line-height: 1.8;
  margin: 0 0 40px;
}
.ab-team__grid {
  display: grid;
  gap: 18px;
}
.ab-team__item {
  position: relative;
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--boo-line);
  border-left: 4px solid var(--boo-orange);
  padding: 28px 24px;
}
.ab-team__item::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 54px;
  height: 54px;
  background: linear-gradient(135deg, transparent 50%, rgba(255, 90, 54, 0.14) 50%);
}
.ab-team__num {
  font-family: var(--boo-font-num);
  font-size: 13px;
  font-weight: 700;
  color: var(--boo-orange);
  letter-spacing: 0.08em;
}
.ab-team__role {
  font-family: var(--boo-font-head);
  font-size: 20px;
  font-weight: 900;
  margin: 14px 0 10px;
}
.ab-team__desc {
  font-size: 14px;
  line-height: 1.8;
  color: var(--boo-ink);
  margin: 0;
}

/* ===== CTA ===== */
.ab-cta {
  padding: 56px 0;
  background: var(--boo-night);
  border-top: 4px solid var(--boo-blue);
}
.ab-cta__inner {
  display: flex;
  flex-direction: column;
  gap: 24px;
  align-items: flex-start;
}
.ab-cta__title {
  font-family: var(--boo-font-head);
  font-size: 24px;
  font-weight: 900;
  color: var(--boo-ice);
  transform: skewX(-6deg);
  margin: 0;
}
.ab-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.ab-cta .boo-btn--ghost {
  border-color: var(--boo-blue);
  color: var(--boo-blue);
  background: transparent;
}

/* ===== 响应式 ===== */
@media (min-width: 768px) {
  .ab-hero__content {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 48px;
    align-items: end;
  }
  .ab-hero__side {
    margin-bottom: 8px;
  }
  .ab-philosophy__grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .ab-team__grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .ab-cta__inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
  .ab-timeline {
    padding-left: 0;
  }
  .ab-timeline::before {
    left: 50%;
    transform: translateX(-50%);
  }
  .ab-timeline__item {
    width: 50%;
    padding-right: 40px;
    margin-bottom: 48px;
  }
  .ab-timeline__item:nth-child(even) {
    margin-left: 50%;
    padding-right: 0;
    padding-left: 40px;
  }
  .ab-timeline__marker {
    left: 50%;
    right: auto;
  }
  .ab-timeline__card {
    border-left: 1px solid var(--boo-line);
  }
  .ab-timeline__card::before {
    display: none;
  }
  .ab-timeline__item:nth-child(odd) .ab-timeline__card {
    border-left: 4px solid var(--boo-blue);
  }
  .ab-timeline__item:nth-child(even) .ab-timeline__card {
    border-right: 4px solid var(--boo-blue);
    border-left: 1px solid var(--boo-line);
  }
  .ab-timeline__item:nth-child(odd) .ab-timeline__card::after {
    content: "";
    position: absolute;
    right: -40px;
    top: 22px;
    width: 40px;
    height: 2px;
    background: var(--boo-blue);
  }
  .ab-timeline__item:nth-child(even) .ab-timeline__card::after {
    content: "";
    position: absolute;
    left: -40px;
    top: 22px;
    width: 40px;
    height: 2px;
    background: var(--boo-blue);
  }
}

@media (min-width: 960px) {
  .ab-origin__grid {
    grid-template-columns: 0.92fr 1.08fr;
    gap: 64px;
    align-items: center;
  }
  .ab-cert-section__grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 56px;
    align-items: start;
  }
}

@media (max-width: 480px) {
  .ab-origin__stats {
    grid-template-columns: 1fr;
  }
  .ab-cert__list {
    grid-template-columns: 1fr;
  }
  .ab-hero__index {
    grid-template-columns: 1fr;
  }
  .ab-hero {
    min-height: auto;
    padding: 60px 0;
  }
  .ab-hero__meta {
    font-size: 12px;
  }
}

/* ===== 滚动浮现动画（渐进增强） ===== */
@keyframes ab-rise {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
@supports (animation-timeline: view()) {
  .ab-timeline__item {
    animation: ab-rise 0.6s linear both;
    animation-timeline: view();
    animation-range: entry 8% cover 32%;
  }
}
@media (prefers-reduced-motion: reduce) {
  .ab-timeline__item {
    animation: none !important;
  }
  .ab-hero__title::after,
  .ab-hero__index-item,
  .ab-timeline__card,
  .ab-cert__item {
    transition: none;
  }
}