.page-about {
  --about-orange: #FF6B00;
  --about-deep: #0B1B3D;
  --about-deep-2: #070F24;
  --about-green: #B6FF00;
  --about-text: #2D3748;
  --about-muted: #5A6A85;
  --about-bg-light: #F4F6FA;
  --about-card-light: #E0E8FF;
  --about-white: #FFFFFF;
  background: var(--about-bg-light);
  color: var(--about-text);
  font-family: var(--font-body);
  line-height: 1.75;
  overflow-x: hidden;
}
.page-about img {
  max-width: 100%;
  height: auto;
  display: block;
}
.page-about a {
  transition: background .2s var(--ease), color .2s var(--ease), transform .2s var(--ease), box-shadow .2s var(--ease);
}
.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.25;
}
.page-about h1 {
  font-size: clamp(34px, 8vw, 52px);
  letter-spacing: .01em;
  margin: 0 0 20px;
  max-width: 13em;
}
.page-about h2 {
  font-size: clamp(24px, 5vw, 34px);
  margin: 0;
  color: var(--about-deep);
}
.page-about h3 {
  font-size: 20px;
  margin: 0 0 8px;
  color: var(--about-deep);
}

/* 首屏分屏 */
.page-about-hero {
  background: linear-gradient(128deg, var(--about-deep) 0%, var(--about-deep-2) 100%);
  color: var(--about-white);
  padding: 56px 20px 48px;
  position: relative;
  overflow: hidden;
}
.page-about-hero::before {
  content: "";
  position: absolute;
  right: -80px;
  top: -60px;
  width: 220px;
  height: 220px;
  background: var(--about-orange);
  opacity: .14;
  border-radius: 50%;
  pointer-events: none;
}
.page-about-hero::after {
  content: "";
  position: absolute;
  left: -40px;
  bottom: -80px;
  width: 180px;
  height: 180px;
  border: 1px solid rgba(182, 255, 0, .18);
  border-radius: 50%;
  pointer-events: none;
}
.page-about-breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  margin-bottom: 32px;
  position: relative;
  z-index: 1;
}
.page-about-breadcrumbs a {
  color: var(--about-green);
  text-decoration: none;
}
.page-about-breadcrumbs a:hover {
  color: var(--about-white);
}
.page-about-breadcrumbs-sep {
  color: rgba(255, 255, 255, .5);
}
.page-about-breadcrumbs span[aria-current] {
  color: rgba(255, 255, 255, .72);
}
.page-about-hero-kicker {
  display: inline-block;
  background: rgba(182, 255, 0, .12);
  border: 1px solid rgba(182, 255, 0, .4);
  color: var(--about-green);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .04em;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  margin-bottom: 22px;
}
.page-about-hero-lead {
  font-size: 16px;
  color: rgba(255, 255, 255, .84);
  max-width: 28em;
  margin: 0 0 30px;
}
.page-about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}
.page-about-btn-primary {
  display: inline-block;
  background: var(--about-orange);
  color: var(--about-white);
  font-weight: 700;
  font-size: 15px;
  padding: 12px 28px;
  border-radius: var(--radius-pill);
  text-decoration: none;
}
.page-about-btn-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(255, 107, 0, .24);
}
.page-about-btn-ghost {
  display: inline-block;
  background: transparent;
  color: var(--about-white);
  font-weight: 600;
  font-size: 15px;
  padding: 11px 26px;
  border: 1px solid rgba(255, 255, 255, .5);
  border-radius: var(--radius-pill);
  text-decoration: none;
}
.page-about-btn-ghost:hover {
  border-color: var(--about-green);
  color: var(--about-green);
  transform: translateY(-2px);
}
.page-about-btn-outline {
  display: inline-block;
  background: transparent;
  color: var(--about-orange);
  font-weight: 600;
  font-size: 14px;
  padding: 10px 24px;
  border: 1px solid var(--about-orange);
  border-radius: var(--radius-pill);
  text-decoration: none;
}
.page-about-btn-outline:hover {
  background: var(--about-orange);
  color: var(--about-white);
  transform: translateY(-2px);
}
.page-about-hero-visual {
  margin-top: 38px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  aspect-ratio: 4 / 3;
  background: var(--about-deep-2);
}
.page-about-hero-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 品牌故事 */
.page-about-story {
  padding: 64px 20px;
  background: var(--about-white);
}
.page-about-section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--about-orange);
  text-transform: uppercase;
  margin-bottom: 10px;
}
.page-about-section-heading {
  margin-bottom: 36px;
}
.page-about-section-heading-light .page-about-section-tag {
  color: var(--about-green);
}
.page-about-section-heading-light h2 {
  color: var(--about-white);
}
.page-about-story-grid {
  display: grid;
  gap: 32px;
}
.page-about-story-text {
  font-size: 15px;
  color: var(--about-text);
}
.page-about-story-text p {
  margin: 0 0 18px;
}
.page-about-story-panel {
  background: var(--about-card-light);
  border-radius: var(--radius-lg);
  padding: 28px;
}
.page-about-story-panel h3 {
  font-size: 18px;
  color: var(--about-deep);
  margin-bottom: 16px;
}
.page-about-story-list {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  display: grid;
  gap: 10px;
}
.page-about-story-list li {
  position: relative;
  padding-left: 24px;
  font-size: 15px;
  color: var(--about-deep);
}
.page-about-story-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .55em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--about-orange);
  box-shadow: 0 0 0 3px rgba(255, 107, 0, .16);
}

/* 发展里程碑 */
.page-about-milestones {
  padding: 64px 20px;
  background: linear-gradient(135deg, var(--about-deep) 0%, var(--about-deep-2) 100%);
}
.page-about-milestones-layout {
  display: grid;
  gap: 24px;
}
.page-about-milestones-aside {
  display: none;
}
.page-about-milestones-list {
  display: grid;
  gap: 18px;
  margin-top: 12px;
}
.page-about-milestone-card {
  position: relative;
  background: rgba(255, 255, 255, .94);
  border-radius: var(--radius-lg);
  padding: 24px 24px 22px 28px;
  box-shadow: var(--shadow-sm);
  border-left: 4px solid var(--about-green);
}
.page-about-milestone-card::before {
  content: "";
  position: absolute;
  left: -13px;
  top: 28px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--about-green);
  border: 3px solid var(--about-deep);
  box-shadow: 0 0 0 4px rgba(182, 255, 0, .2);
}
.page-about-milestone-year {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 800;
  color: var(--about-orange);
  line-height: 1.1;
  margin-bottom: 6px;
}
.page-about-milestone-card p {
  font-size: 14px;
  color: var(--about-muted);
  margin: 8px 0 0;
}

/* 数据与服务规模 */
.page-about-stats {
  padding: 64px 20px;
  background: var(--about-card-light);
}
.page-about-stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-bottom: 40px;
}
.page-about-stat-item {
  background: var(--about-white);
  border-radius: var(--radius-md);
  padding: 22px 14px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  border-bottom: 4px solid var(--about-orange);
}
.page-about-stat-value {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(30px, 6vw, 44px);
  font-weight: 800;
  color: var(--about-deep);
  line-height: 1.15;
  letter-spacing: -.01em;
}
.page-about-stat-value::after {
  content: "";
  display: block;
  width: 28px;
  height: 3px;
  background: var(--about-orange);
  border-radius: var(--radius-pill);
  margin: 10px auto 8px;
}
.page-about-stat-label {
  font-size: 14px;
  color: var(--about-muted);
  font-weight: 500;
}
.page-about-stats-chart {
  display: grid;
  gap: 28px;
  align-items: center;
}
.page-about-stats-chart img {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  object-fit: cover;
  background: var(--about-white);
}
.page-about-stats-note p {
  font-size: 15px;
  color: var(--about-text);
  margin: 0 0 20px;
}

/* 团队与理念 */
.page-about-team {
  padding: 64px 20px;
  background: var(--about-white);
}
.page-about-team-grid {
  display: grid;
  gap: 32px;
}
.page-about-team-figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: var(--about-deep);
}
.page-about-team-figure img {
  width: 100%;
  object-fit: cover;
}
.page-about-team-copy p {
  font-size: 15px;
  color: var(--about-text);
  margin: 0 0 18px;
}

/* 本地合作网络 */
.page-about-partners {
  padding: 64px 20px;
  background: linear-gradient(128deg, var(--about-deep) 0%, var(--about-deep-2) 100%);
}
.page-about-partners-grid {
  display: grid;
  gap: 16px;
  margin-bottom: 36px;
}
.page-about-partner-card {
  background: rgba(255, 255, 255, .96);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, .12);
  border-top: 4px solid var(--about-green);
}
.page-about-partner-card-title {
  display: block;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 800;
  color: var(--about-deep);
  margin-bottom: 10px;
}
.page-about-partner-card p {
  font-size: 14px;
  color: var(--about-muted);
  margin: 0;
}
.page-about-partners-cta {
  text-align: center;
}

/* 桌面端增强 */
@media (min-width: 760px) {
  .page-about-hero {
    padding: 80px 32px 64px;
  }
  .page-about-hero-layout {
    display: grid;
    grid-template-columns: 1.1fr .9fr;
    gap: 48px;
    align-items: center;
    max-width: var(--container-max);
    margin: 0 auto;
  }
  .page-about-hero-visual {
    margin-top: 0;
  }
  .page-about-story,
  .page-about-milestones,
  .page-about-stats,
  .page-about-team,
  .page-about-partners {
    padding: 96px 32px;
  }
  .page-about-story-grid,
  .page-about-team-grid {
    grid-template-columns: 1.1fr .9fr;
    gap: 56px;
    align-items: center;
    max-width: var(--container-max);
    margin: 0 auto;
  }
  .page-about-story-grid {
    grid-template-columns: 1fr .85fr;
  }
  .page-about-stats-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    max-width: var(--container-max);
    margin-left: auto;
    margin-right: auto;
  }
  .page-about-stat-item {
    padding: 30px 18px;
  }
  .page-about-stats-chart {
    grid-template-columns: .9fr 1.1fr;
    gap: 48px;
    max-width: var(--container-max);
    margin-left: auto;
    margin-right: auto;
  }
  .page-about-partners-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: var(--container-max);
    margin-left: auto;
    margin-right: auto;
    margin-bottom: 44px;
  }
}

@media (min-width: 1024px) {
  .page-about-hero {
    padding: 88px 40px 76px;
  }
  .page-about-hero-copy {
    padding-left: 24px;
  }
  .page-about-section-heading {
    max-width: var(--container-max);
    margin-left: auto;
    margin-right: auto;
  }
  .page-about-milestones-layout {
    grid-template-columns: 220px 1fr;
    gap: 56px;
    max-width: var(--container-max);
    margin: 0 auto;
  }
  .page-about-milestones-aside {
    display: block;
    position: sticky;
    top: 120px;
    align-self: start;
  }
  .page-about-milestones-aside-inner {
    display: flex;
    flex-direction: column;
    gap: 36px;
    border-right: 2px solid rgba(182, 255, 0, .3);
    padding: 12px 0;
  }
  .page-about-milestones-side-num {
    font-family: var(--font-display);
    font-size: 26px;
    font-weight: 800;
    color: rgba(255, 255, 255, .42);
    padding-right: 24px;
    position: relative;
    transition: color .2s var(--ease), transform .2s var(--ease);
    cursor: default;
  }
  .page-about-milestones-side-num::after {
    content: "";
    position: absolute;
    right: -8px;
    top: 50%;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--about-green);
    transform: translate(50%, -50%);
    box-shadow: 0 0 0 4px rgba(182, 255, 0, .18);
    transition: transform .2s var(--ease), box-shadow .2s var(--ease);
  }
  .page-about-milestones-side-num:hover {
    color: var(--about-green);
    transform: translateX(8px) scale(1.04);
  }
  .page-about-milestones-side-num:hover::after {
    box-shadow: 0 0 0 8px rgba(182, 255, 0, .26);
    transform: translate(50%, -50%) scale(1.3);
  }
  .page-about-milestones-list {
    gap: 24px;
    margin-top: 0;
  }
  .page-about-milestone-card {
    padding: 32px 32px 28px 36px;
    transition: transform .2s var(--ease), box-shadow .2s var(--ease);
  }
  .page-about-milestone-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 14px 32px rgba(0, 0, 0, .16);
  }
  .page-about-team-copy {
    font-size: 16px;
  }
  .page-about-partner-card {
    padding: 34px 28px;
  }
}