.page-about {
  --ab-glow: rgba(230, 247, 76, 0.16);
  --ab-grid-line: rgba(46, 139, 87, 0.16);
}

@keyframes ab-pulse {
  0% { box-shadow: 0 0 0 0 rgba(230, 247, 76, 0.45); }
  70% { box-shadow: 0 0 0 12px rgba(230, 247, 76, 0); }
  100% { box-shadow: 0 0 0 0 rgba(230, 247, 76, 0); }
}

@keyframes ab-rise {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- Hero ---------- */
.page-about .ab-hero {
  position: relative;
  overflow: hidden;
  padding: 44px 0 60px;
  background:
    radial-gradient(circle at 82% 12%, rgba(230, 247, 76, 0.09), transparent 30%),
    radial-gradient(circle at 12% 88%, rgba(46, 139, 87, 0.24), transparent 42%),
    linear-gradient(180deg, rgba(16, 42, 32, 0.35), rgba(11, 30, 23, 0.1));
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(var(--ab-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--ab-grid-line) 1px, transparent 1px);
  background-size: 46px 46px;
  -webkit-mask-image: radial-gradient(circle at 72% 16%, #000 0%, transparent 64%);
  mask-image: radial-gradient(circle at 72% 16%, #000 0%, transparent 64%);
  pointer-events: none;
}

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

.page-about .ab-hero-grid {
  display: grid;
  gap: 32px;
}

.page-about .ab-hero-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 18px;
}

.page-about .ab-hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--yellow);
  flex-wrap: wrap;
}

.page-about .ab-live-state {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid rgba(230, 247, 76, 0.3);
  border-radius: 999px;
  background: rgba(230, 247, 76, 0.07);
  padding: 6px 12px;
}

.page-about .ab-live-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--yellow);
  animation: ab-pulse 2.2s ease-out infinite;
}

.page-about .ab-hero-copy h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(32px, 8vw, 58px);
  line-height: 1.08;
  letter-spacing: 0.01em;
  max-width: 14em;
  color: var(--text-main);
}

.page-about .ab-hero-lead {
  margin: 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.95;
  color: var(--text-sub);
}

.page-about .ab-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 4px;
}

.page-about .ab-hero-meta {
  list-style: none;
  margin: 8px 0 0;
  padding: 18px 0 0;
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  border-top: 1px solid var(--border);
}

.page-about .ab-hero-meta li {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.page-about .ab-meta-k {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-sub);
}

.page-about .ab-meta-v {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-main);
}

.page-about .ab-hero-figure {
  position: relative;
  margin: 0;
}

.page-about .ab-hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.38);
}

.page-about .ab-hero-tag {
  position: absolute;
  top: 14px;
  left: 12px;
  z-index: 2;
  display: inline-block;
  padding: 6px 11px;
  border-radius: 3px;
  background: var(--orange);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  transform: rotate(-3deg);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.3);
}

/* ---------- 品牌故事 ---------- */
.page-about .ab-story {
  padding: 68px 0;
  border-block: 1px solid var(--border);
  background: linear-gradient(180deg, var(--bg-deep) 0%, rgba(16, 42, 32, 0.5) 100%);
}

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

.page-about .ab-story-body p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.95;
  color: var(--text-sub);
}

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

.page-about .ab-story-body a {
  color: var(--yellow);
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* ---------- 发展历程 ---------- */
.page-about .ab-journey {
  padding: 68px 0;
  border-block: 1px solid var(--border);
  background:
    radial-gradient(circle at 14% 22%, rgba(128, 0, 32, 0.34), transparent 34%),
    linear-gradient(180deg, rgba(16, 42, 32, 0.72), rgba(11, 30, 23, 0.94));
}

.page-about .ab-journey .section-header {
  margin-bottom: 44px;
}

.page-about .ab-timeline-list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 34px;
}

.page-about .ab-timeline-list::before {
  content: "";
  position: absolute;
  left: 35px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--green-bright) 0%, var(--orange) 55%, var(--yellow) 100%);
  opacity: 0.4;
}

.page-about .ab-timeline-item {
  position: relative;
  padding-left: 82px;
}

.page-about .ab-timeline-marker {
  position: absolute;
  top: 0;
  left: 6px;
  width: 58px;
  height: 58px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-panel);
  border: 2px solid var(--green-bright);
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.page-about .ab-timeline-marker::after {
  content: "";
  position: absolute;
  right: -5px;
  top: -5px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--yellow);
  animation: ab-pulse 2.4s ease-out infinite;
}

.page-about .ab-timeline-marker span {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--yellow);
  letter-spacing: 0.04em;
}

.page-about .ab-timeline-item:hover .ab-timeline-marker,
.page-about .ab-timeline-item:focus-within .ab-timeline-marker {
  border-color: var(--yellow);
  box-shadow: 0 0 0 10px var(--ab-glow);
  transform: scale(1.05);
}

.page-about .ab-timeline-card {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px 18px 16px;
  background: rgba(16, 42, 32, 0.78);
  backdrop-filter: blur(6px);
}

.page-about .ab-timeline-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 3px;
  background: var(--green-bright);
}

.page-about .ab-timeline-card h3 {
  margin: 0 0 8px;
  font-size: 18px;
  line-height: 1.4;
  color: var(--text-main);
}

.page-about .ab-timeline-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--text-sub);
}

.page-about .ab-journey-figure {
  margin: 40px 0 0;
  text-align: center;
}

.page-about .ab-journey-figure img {
  display: block;
  width: 100%;
  max-width: 540px;
  height: auto;
  margin-inline: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
}

.page-about .ab-journey-figure figcaption,
.page-about .ab-partner-figure figcaption {
  margin-top: 10px;
  font-size: 12px;
  color: var(--text-sub);
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
}

/* ---------- 数据能力 ---------- */
.page-about .ab-data {
  padding: 68px 0;
  border-block: 1px solid var(--border);
  background:
    radial-gradient(circle at 88% 8%, rgba(75, 0, 130, 0.38), transparent 30%),
    radial-gradient(circle at 6% 92%, rgba(46, 139, 87, 0.18), transparent 36%),
    linear-gradient(180deg, rgba(11, 30, 23, 0.96), rgba(16, 42, 32, 0.92));
}

.page-about .ab-data-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 36px;
}

.page-about .ab-data-card {
  position: relative;
  overflow: hidden;
  padding: 20px 16px 18px;
  background: rgba(11, 30, 23, 0.55);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  animation: ab-rise 0.5s ease both;
}

.page-about .ab-data-card:nth-child(2) {
  animation-delay: 0.08s;
}

.page-about .ab-data-card:nth-child(3) {
  animation-delay: 0.16s;
}

.page-about .ab-data-card:nth-child(4) {
  animation-delay: 0.24s;
}

.page-about .ab-data-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--orange);
}

.page-about .ab-data-card:nth-child(even)::before {
  background: var(--yellow);
}

.page-about .ab-data-value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(26px, 7vw, 38px);
  line-height: 1.12;
  font-weight: 700;
  color: var(--text-main);
}

.page-about .ab-data-value--yellow {
  color: var(--yellow);
}

.page-about .ab-data-value--green {
  color: var(--green-bright);
}

.page-about .ab-data-label {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--text-sub);
}

.page-about .ab-data-features {
  display: grid;
  gap: 12px;
  margin-top: 26px;
}

.page-about .ab-feature {
  padding: 16px 16px 16px 18px;
  background: rgba(11, 30, 23, 0.5);
  border-left: 3px solid var(--green-bright);
  border-radius: 0 var(--radius) var(--radius) 0;
  transition: background var(--transition), transform var(--transition);
}

.page-about .ab-feature:hover {
  background: rgba(16, 42, 32, 0.74);
  transform: translateX(4px);
}

.page-about .ab-feature-tag {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--orange);
}

.page-about .ab-feature h3 {
  margin: 0 0 6px;
  font-size: 15px;
  color: var(--text-main);
}

.page-about .ab-feature p {
  margin: 0;
  font-size: 13px;
  line-height: 1.85;
  color: var(--text-sub);
}

/* ---------- 资质与合作 ---------- */
.page-about .ab-qual {
  padding: 68px 0;
  border-block: 1px solid var(--border);
  background:
    radial-gradient(circle at 18% 10%, rgba(46, 139, 87, 0.16), transparent 30%),
    var(--bg-deep);
}

.page-about .ab-qual-grid {
  display: grid;
  gap: 16px;
  margin-top: 36px;
}

.page-about .ab-qual-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px 20px;
  background: rgba(16, 42, 32, 0.72);
  backdrop-filter: blur(6px);
}

.page-about .ab-card-title {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--yellow);
}

.page-about .ab-card-title::before {
  content: "";
  width: 18px;
  height: 3px;
  background: var(--orange);
  border-radius: 2px;
}

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

.page-about .ab-cert-list li {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 12px;
  align-items: center;
}

.page-about .ab-cert-num {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  color: var(--green-bright);
  line-height: 1;
}

.page-about .ab-cert-text {
  font-size: 14px;
  line-height: 1.65;
  color: var(--text-sub);
}

.page-about .ab-cert-text strong {
  display: block;
  color: var(--text-main);
  font-size: 15px;
}

.page-about .ab-partner-desc {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--text-sub);
}

.page-about .ab-partner-points {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .ab-partner-points li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-main);
}

.page-about .ab-partner-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--orange);
}

.page-about .ab-partner-note {
  margin: 0;
  padding: 12px 14px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--text-main);
  background: rgba(230, 247, 76, 0.08);
  border-left: 3px solid var(--yellow);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.page-about .ab-partner-figure {
  margin: 30px 0 0;
  text-align: center;
}

.page-about .ab-partner-figure img {
  display: block;
  width: 100%;
  max-width: 720px;
  height: auto;
  margin-inline: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
}

/* ---------- 页尾 CTA ---------- */
.page-about .ab-cta {
  padding: 56px 0 84px;
}

.page-about .ab-cta-inner {
  position: relative;
  overflow: hidden;
  text-align: center;
  padding: 42px 22px 38px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(135deg, rgba(46, 139, 87, 0.26), rgba(11, 30, 23, 0.92) 62%),
    var(--bg-panel);
}

.page-about .ab-cta-inner::before {
  content: "FULL-TIME";
  position: absolute;
  right: -14px;
  bottom: -22px;
  font-family: var(--font-display);
  font-size: 84px;
  line-height: 1;
  color: rgba(230, 247, 76, 0.05);
  letter-spacing: 0.02em;
  pointer-events: none;
}

.page-about .ab-cta-inner h2 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(24px, 5vw, 34px);
  color: var(--text-main);
}

.page-about .ab-cta-inner p {
  max-width: 52ch;
  margin: 0 auto 22px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--text-sub);
}

.page-about .ab-cta-actions {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

/* ---------- 桌面端布局 ---------- */
@media (min-width: 900px) {
  .page-about .ab-hero {
    padding: 64px 0 88px;
  }

  .page-about .ab-hero-grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    gap: 48px;
    align-items: center;
  }

  .page-about .ab-hero-figure {
    transform: rotate(1.2deg) translateY(4px);
  }

  .page-about .ab-story,
  .page-about .ab-journey,
  .page-about .ab-data,
  .page-about .ab-qual {
    padding: 92px 0;
  }

  .page-about .ab-story-grid {
    grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.28fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .ab-story-side {
    position: sticky;
    top: calc(var(--header-height) + 28px);
  }

  .page-about .ab-timeline-list {
    gap: 44px;
  }

  .page-about .ab-timeline-list::before {
    left: 50%;
    transform: translateX(-50%);
  }

  .page-about .ab-timeline-item {
    width: 50%;
    padding: 0 62px 0 0;
  }

  .page-about .ab-timeline-item:nth-child(even) {
    margin-left: 50%;
    padding: 0 0 0 62px;
  }

  .page-about .ab-timeline-item .ab-timeline-marker {
    left: auto;
    right: -29px;
  }

  .page-about .ab-timeline-item:nth-child(even) .ab-timeline-marker {
    right: auto;
    left: -29px;
  }

  .page-about .ab-data-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .ab-data-features {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
  }

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

/* ---------- 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .ab-live-dot,
  .page-about .ab-timeline-marker::after,
  .page-about .ab-data-card {
    animation: none;
  }

  .page-about .ab-timeline-marker,
  .page-about .ab-feature,
  .page-about .ab-hero-figure {
    transition: none;
    transform: none;
  }
}