.page-about {
  position: relative;
  background:
    linear-gradient(180deg, rgba(198, 255, 62, 0.05) 0%, rgba(198, 255, 62, 0) 320px),
    var(--bg-base);
  color: var(--text-primary);
  overflow-x: hidden;
}

/* ===== Hero首屏 ===== */
.about-hero {
  position: relative;
  padding: var(--space-4) 0 0;
  border-bottom: 1px solid var(--line-subtle);
}

.about-hero::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 42%;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.08), transparent 70%);
  pointer-events: none;
}

.about-hero__inner {
  display: grid;
  gap: var(--space-5);
}

.about-hero__main {
  position: relative;
  z-index: 1;
}

.about-hero__eyebrow {
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--secondary-electric);
  margin: var(--space-4) 0 var(--space-2);
}

.about-hero__title {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(1.8rem, 6vw, 2.9rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  transform: skewX(var(--skew));
  margin: 0 0 var(--space-3);
}

.about-hero__title-suffix {
  display: block;
  font-size: 0.52em;
  font-weight: 700;
  color: var(--text-secondary);
  letter-spacing: 0.01em;
}

.about-hero__desc {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text-secondary);
  max-width: 62ch;
  margin: 0 0 var(--space-4);
}

.about-hero__tags {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
}

.about-hero__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  margin-left: var(--space-2);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--secondary-electric);
  text-decoration: none;
  border-bottom: 2px solid var(--secondary-electric);
  padding-bottom: 2px;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.about-hero__link:hover,
.about-hero__link:focus-visible {
  color: var(--primary-neon);
  border-color: var(--primary-neon);
}

.about-hero__figure {
  position: relative;
  margin: 0;
  border: 1px solid var(--line-subtle);
  background: var(--bg-surface);
  overflow: hidden;
}

.about-hero__figure::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(to bottom, var(--primary-neon), var(--secondary-electric));
  z-index: 2;
}

.about-hero__img {
  display: block;
  width: 100%;
  height: 200px;
  object-fit: cover;
  object-position: center 25%;
}

.about-hero__figcaption {
  padding: var(--space-3) var(--space-4);
  font-size: 0.8rem;
  color: var(--text-muted);
  background: var(--bg-elevated);
  border-top: 1px solid var(--line-subtle);
}

/* ===== 布局骨架 ===== */
.about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
  padding-top: var(--space-6);
}

.about-content {
  min-width: 0;
}

/* 侧边目录：移动端隐藏 */
.about-toc {
  display: none;
}

/* ===== 章节通用 ===== */
.about-section {
  padding: var(--space-6) 0;
  border-top: 1px solid var(--line-subtle);
  position: relative;
}

.about-section__head {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

.about-section__num {
  font-family: var(--font-data);
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary-neon);
  line-height: 1;
}

.about-section__line {
  flex: 0 0 40px;
  height: 2px;
  background: linear-gradient(to right, var(--secondary-electric), transparent);
}

.about-section__line--electric {
  background: linear-gradient(to right, var(--secondary-electric), transparent);
}

.about-section__line--neon {
  background: linear-gradient(to right, var(--primary-neon), transparent);
}

.about-section__line--gold {
  background: linear-gradient(to right, var(--accent-gold), transparent);
}

.about-section__title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 900;
  transform: skewX(var(--skew));
  margin: 0;
}

.about-section__body {
  color: var(--text-secondary);
}

/* ===== 我们是谁 ===== */
.about-lead {
  font-size: 1.05rem;
  line-height: 1.85;
  max-width: 74ch;
  margin: 0 0 var(--space-5);
}

.about-who-grid {
  display: grid;
  gap: var(--space-4);
}

.about-who-card {
  position: relative;
  background: var(--bg-surface);
  border: 1px solid var(--line-subtle);
  padding: var(--space-5);
  transition: border-color var(--transition-base), transform var(--transition-base);
}

.about-who-card:hover {
  border-color: var(--secondary-electric);
  transform: translateX(4px);
}

.about-who-card:nth-child(2):hover {
  border-color: var(--primary-neon);
}

.about-who-card:nth-child(3):hover {
  border-color: var(--accent-gold);
}

.about-who-card__bar {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--secondary-electric);
  opacity: 0.7;
}

.about-who-card:nth-child(2) .about-who-card__bar {
  background: var(--primary-neon);
}

.about-who-card:nth-child(3) .about-who-card__bar {
  background: var(--accent-gold);
}

.about-who-card__title {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 0 0 var(--space-2);
  color: var(--text-primary);
}

.about-who-card p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.7;
}

.about-who-card a {
  color: var(--secondary-electric);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.about-who-card a:hover {
  color: var(--primary-neon);
}

/* ===== 发展历程 · 时间线 ===== */
.about-timeline {
  position: relative;
}

.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
}

.timeline__item {
  position: relative;
  padding: 0 0 var(--space-6) 36px;
}

.timeline__item::before {
  content: "";
  position: absolute;
  left: 13px;
  top: 28px;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--secondary-electric), var(--line-subtle));
  opacity: 0.45;
}

.timeline__item:last-child::before {
  content: none;
}

.timeline__marker {
  position: absolute;
  left: 9px;
  top: 20px;
  width: 10px;
  height: 10px;
  background: var(--secondary-electric);
  transform: rotate(45deg);
  box-shadow: var(--glow-electric);
}

.timeline__item:nth-child(even) .timeline__marker {
  background: var(--primary-neon);
  box-shadow: var(--glow-neon);
}

.timeline__marker--gold {
  background: var(--accent-gold) !important;
  box-shadow: 0 0 14px rgba(255, 194, 75, 0.5) !important;
}

.timeline__year {
  display: inline-block;
  font-family: var(--font-data);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
  padding-left: var(--space-3);
  border-left: 3px solid var(--secondary-electric);
}

.timeline__item:nth-child(even) .timeline__year {
  border-left-color: var(--primary-neon);
}

.timeline__item:last-child .timeline__year {
  border-left-color: var(--accent-gold);
}

.timeline__content {
  background: var(--bg-surface);
  border: 1px solid var(--line-subtle);
  padding: var(--space-4) var(--space-5);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.timeline__content:hover {
  border-color: var(--text-muted);
  box-shadow: var(--shadow-card);
}

.timeline__content h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin: 0 0 var(--space-2);
  color: var(--text-primary);
}

.timeline__content p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

/* ===== 业务规模 ===== */
.scale-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

.scale-stat {
  position: relative;
  background: var(--bg-surface);
  border: 1px solid var(--line-subtle);
  padding: var(--space-4) var(--space-3);
  text-align: center;
  overflow: hidden;
}

.scale-stat::after {
  content: "";
  position: absolute;
  right: -22px;
  bottom: -22px;
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, transparent 50%, rgba(198, 255, 62, 0.12) 50%);
}

.scale-stat:nth-child(2)::after {
  background: linear-gradient(135deg, transparent 50%, rgba(0, 212, 255, 0.1) 50%);
}

.scale-stat:nth-child(3)::after {
  background: linear-gradient(135deg, transparent 50%, rgba(255, 194, 75, 0.14) 50%);
}

.scale-stat:nth-child(4)::after {
  background: linear-gradient(135deg, transparent 50%, rgba(242, 246, 250, 0.08) 50%);
}

.scale-stat .stat__value {
  font-family: var(--font-data);
  font-size: 2.4rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--primary-neon);
  display: block;
}

.scale-stat:nth-child(2) .stat__value {
  color: var(--secondary-electric);
}

.scale-stat:nth-child(3) .stat__value {
  color: var(--accent-gold);
}

.scale-stat:nth-child(4) .stat__value {
  color: var(--text-primary);
}

.scale-stat .stat__label {
  font-size: 0.78rem;
  color: var(--text-secondary);
  display: block;
  margin-top: var(--space-2);
  line-height: 1.4;
}

.scale-detail {
  display: grid;
  gap: var(--space-4);
}

.scale-figure {
  margin: 0;
  border: 1px solid var(--line-subtle);
  background: var(--bg-surface);
  padding: var(--space-3);
}

.scale-figure__img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 260px;
  object-fit: contain;
}

.scale-figure figcaption {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-align: center;
  padding-top: var(--space-2);
  border-top: 1px solid var(--line-subtle);
  margin-top: var(--space-2);
}

.scale-legend {
  display: grid;
  gap: var(--space-4);
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  padding: var(--space-3) 0;
}

.scale-team {
  background: var(--bg-elevated);
  border: 1px solid var(--line-subtle);
  padding: var(--space-5);
}

.scale-team h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin: 0 0 var(--space-2);
  color: var(--text-primary);
}

.scale-team p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

/* ===== 资质与荣誉 ===== */
.honors-grid {
  display: grid;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}

.honor-card {
  position: relative;
  background: linear-gradient(135deg, var(--bg-elevated) 0%, var(--bg-surface) 100%);
  border: 1px solid var(--line-subtle);
  padding: var(--space-5);
}

.honor-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(to right, var(--accent-gold), var(--primary-neon));
}

.honor-card:nth-child(2)::before {
  background: linear-gradient(to right, var(--primary-neon), var(--secondary-electric));
}

.honor-card__mark {
  display: inline-block;
  font-family: var(--font-data);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-gold);
  margin-bottom: var(--space-2);
  padding: var(--space-1) var(--space-2);
  border: 1px solid rgba(255, 194, 75, 0.35);
}

.honor-card:nth-child(2) .honor-card__mark {
  color: var(--primary-neon);
  border-color: rgba(198, 255, 62, 0.35);
}

.honor-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 0 0 var(--space-2);
  color: var(--text-primary);
}

.honor-card p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

.honors-figure {
  margin: var(--space-5) 0 0;
  border: 1px solid var(--line-subtle);
  background: var(--bg-surface);
  overflow: hidden;
}

.honors-figure__img {
  display: block;
  width: 100%;
  height: 160px;
  object-fit: cover;
  object-position: center;
}

.honors-figure figcaption {
  font-size: 0.82rem;
  color: var(--text-muted);
  padding: var(--space-3) var(--space-4);
  border-top: 1px solid var(--line-subtle);
}

/* ===== 信任区 ===== */
.about-trust {
  margin: var(--space-5) 0 var(--space-7);
  padding: var(--space-5);
  background: linear-gradient(135deg, rgba(198, 255, 62, 0.08) 0%, rgba(0, 212, 255, 0.05) 100%);
  border: 1px solid var(--line-subtle);
  position: relative;
}

.about-trust::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 3px;
  background: linear-gradient(to right, var(--primary-neon), var(--secondary-electric), var(--accent-gold));
}

.about-trust__text {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-primary);
  margin: 0 0 var(--space-3);
  font-weight: 600;
}

.about-trust__hint {
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin: 0 0 var(--space-4);
}

.about-trust__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

/* ===== 滚动显现（渐进增强） ===== */
@media (prefers-reduced-motion: no-preference) {
  .page-about.js-ready .page-about [data-reveal] {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 0.6s var(--ease-out-expo), transform 0.6s var(--ease-out-expo);
  }
  .page-about.js-ready .page-about [data-reveal].is-visible {
    opacity: 1;
    transform: none;
  }
}

/* ===== 桌面端 ===== */
@media (min-width: 960px) {
  .about-hero {
    padding-top: var(--space-6);
  }

  .about-hero__inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: end;
    gap: var(--space-7);
  }

  .about-hero__img {
    height: auto;
    object-position: center;
  }

  .about-layout {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: var(--space-7);
  }

  .about-toc {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    position: sticky;
    top: calc(var(--header-bar-height) + var(--space-5));
    align-self: start;
    padding-top: var(--space-4);
    padding-left: var(--space-5);
    border-left: 2px solid var(--line-subtle);
  }

  .about-toc__label {
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: var(--space-3);
  }

  .about-toc__link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    padding: var(--space-2) 0;
    border-bottom: 1px solid transparent;
    transition: color var(--transition-fast), border-color var(--transition-fast);
  }

  .about-toc__link:hover,
  .about-toc__link:focus-visible {
    color: var(--primary-neon);
    border-color: var(--line-subtle);
  }

  .about-toc__path {
    margin-top: var(--space-5);
    font-size: 0.76rem;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    text-transform: uppercase;
  }

  .about-section {
    padding: var(--space-7) 0;
  }

  .about-who-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-5);
  }

  .scale-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--space-4);
  }

  .scale-stat {
    padding: var(--space-5) var(--space-4);
  }

  .scale-stat .stat__value {
    font-size: 3rem;
  }

  .scale-detail {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: var(--space-5);
  }

  .scale-figure__img {
    max-height: 340px;
  }

  .honors-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-5);
  }

  .honors-figure__img {
    height: auto;
  }

  .about-trust {
    padding: var(--space-6);
  }
}