.page-about {
  --about-ease: cubic-bezier(0.22, 1, 0.36, 1);
  background: var(--c-light);
  color: var(--c-dark);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: clip;
}

.page-about .container {
  width: min(1200px, 100% - 48px);
  margin-inline: auto;
}

.page-about .section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: 10px;
}

.page-about .section-kicker::before {
  content: "";
  width: 28px;
  height: 2px;
  background: var(--c-accent);
}

.page-about .section-title {
  font-family: var(--font-headline);
  font-size: clamp(1.8rem, 4.5vw, 3rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: 0.01em;
  color: var(--c-dark);
  margin: 0;
}

.page-about .about-section-heading {
  margin-bottom: 28px;
}

.page-about .about-section-heading.is-on-dark .section-title {
  color: var(--c-white);
}

.page-about .about-section-heading.is-on-dark .section-kicker {
  color: var(--c-electric);
}

.page-about .about-section-heading.is-on-dark .section-kicker::before {
  background: var(--c-electric);
}

/* 面包屑 */
.page-about .about-breadcrumb {
  padding-top: 26px;
}

.page-about .breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 14px;
}

.page-about .breadcrumb-item {
  color: var(--c-gray);
  text-decoration: none;
  transition: color 0.2s var(--about-ease);
}

.page-about .breadcrumb-item:hover {
  color: var(--c-accent);
}

.page-about .breadcrumb-item.is-current {
  color: var(--c-primary);
  font-weight: 600;
}

.page-about .breadcrumb-divider {
  color: var(--c-border);
}

/* 页内章节索引 */
.page-about .about-index {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 24px;
  padding-top: 26px;
  padding-bottom: 10px;
}

.page-about .about-index-caption {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--c-gray);
}

.page-about .about-index-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
}

.page-about .about-index-links a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  color: var(--c-gray);
  font-size: 14px;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 3px;
  transition: color 0.2s var(--about-ease), border-color 0.2s var(--about-ease);
}

.page-about .about-index-links a:hover,
.page-about .about-index-links a.is-active {
  color: var(--c-primary);
  border-color: var(--c-accent);
}

.page-about .about-index-links .nav-index {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--c-electric);
}

/* 首屏英雄 */
.page-about .about-hero {
  position: relative;
  background: var(--c-primary);
  color: var(--c-white);
  padding: 60px 0 84px;
  margin-top: 18px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 36px), 0 100%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(135deg, rgba(0, 229, 255, 0.16) 0%, transparent 42%),
    repeating-linear-gradient(-45deg, rgba(255, 255, 255, 0.03) 0 1px, transparent 1px 7px);
}

.page-about .about-hero-inner {
  position: relative;
  display: grid;
  gap: 30px;
}

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

.page-about .about-hero-copy .section-kicker {
  color: var(--c-electric);
}

.page-about .about-hero-copy .section-kicker::before {
  background: var(--c-electric);
}

.page-about .about-hero h1 {
  font-family: var(--font-headline);
  font-size: clamp(2.5rem, 7vw, 4.6rem);
  font-weight: 700;
  line-height: 1.04;
  letter-spacing: 0.01em;
  margin: 12px 0 20px;
}

.page-about .about-lead {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: rgba(255, 255, 255, 0.82);
  max-width: 56ch;
  margin: 0;
}

.page-about .about-hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.page-about .tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  padding: 6px 12px;
  border: 1px solid rgba(0, 229, 255, 0.4);
  color: var(--c-electric);
  background: rgba(0, 229, 255, 0.08);
}

.page-about .tag-live {
  border-color: rgba(0, 229, 255, 0.4);
  color: var(--c-electric);
  background: rgba(0, 229, 255, 0.1);
}

.page-about .tag-review {
  border-color: rgba(139, 92, 246, 0.5);
  color: #c4b5fd;
  background: rgba(139, 92, 246, 0.12);
}

.page-about .tag-gold {
  border-color: rgba(255, 215, 0, 0.5);
  color: var(--c-gold);
  background: rgba(255, 215, 0, 0.1);
}

.page-about .about-hero-media {
  position: relative;
  overflow: hidden;
}

.page-about .about-hero-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

/* 图片框架 */
.page-about .image-frame {
  position: relative;
  overflow: hidden;
  background: var(--c-primary);
}

.page-about .image-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(135deg, rgba(10, 31, 68, 0.18) 0%, transparent 45%);
}

.page-about .image-frame img {
  display: block;
  width: 100%;
  height: auto;
  transition: transform 0.5s var(--about-ease);
}

.page-about .image-frame:hover img {
  transform: scale(1.02);
}

/* 品牌使命 */
.page-about .about-mission {
  position: relative;
  padding: 72px 0 64px;
  background: var(--c-light);
}

.page-about .about-mission::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  height: 5px;
  width: 100%;
  background: linear-gradient(90deg, var(--c-accent) 0%, var(--c-electric) 60%, transparent 100%);
}

.page-about .about-mission-grid {
  display: grid;
  gap: 28px;
}

.page-about .about-mission-copy {
  max-width: 640px;
  font-size: 1rem;
  color: var(--c-dark);
}

.page-about .about-mission-copy p + p {
  margin-top: 16px;
}

.page-about .about-mission-note {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px 0 0 20px;
  border-left: 1px solid var(--c-border);
}

.page-about .rotate-note {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.28em;
  color: var(--c-electric);
}

.page-about .about-mission-note p {
  font-family: var(--font-headline);
  font-size: 1.4rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--c-primary);
  margin: 0;
  max-width: 12ch;
}

/* 发展历程 */
.page-about .about-timeline-sec {
  background: var(--c-primary);
  color: var(--c-white);
  padding: 72px 0 96px;
  position: relative;
}

.page-about .about-timeline-sec::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 120px;
  height: 120px;
  background: linear-gradient(135deg, transparent 50%, rgba(255, 107, 0, 0.8) 50%);
  opacity: 0.35;
  pointer-events: none;
}

.page-about .about-timeline {
  display: grid;
  gap: 24px;
  margin-top: 36px;
}

.page-about .about-timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 18px;
  padding-bottom: 8px;
}

.page-about .about-timeline-item:not(:last-child)::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 36px;
  bottom: -12px;
  width: 1px;
  background: rgba(255, 255, 255, 0.16);
}

.page-about .about-timeline-year {
  position: relative;
  z-index: 1;
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: 1.9rem;
  line-height: 1;
  color: var(--c-gold);
  display: flex;
  align-items: baseline;
  gap: 6px;
  padding: 6px 0 0 18px;
}

.page-about .about-timeline-year::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 10px;
  height: 10px;
  background: var(--c-accent);
  transform: rotate(45deg);
  box-shadow: 0 0 0 4px rgba(255, 107, 0, 0.2);
}

.page-about .about-timeline-year span {
  font-size: 0.78rem;
  font-family: var(--font-mono);
  color: var(--c-electric);
  letter-spacing: 0.12em;
}

.page-about .about-timeline-card {
  padding: 18px 20px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-left: 3px solid var(--c-accent);
}

.page-about .about-timeline-card h3 {
  font-family: var(--font-headline);
  font-size: 1.08rem;
  line-height: 1.3;
  color: var(--c-white);
  margin: 0 0 8px;
}

.page-about .about-timeline-card p {
  font-size: 0.94rem;
  color: rgba(255, 255, 255, 0.72);
  margin: 0;
}

/* 数据与规模 */
.page-about .about-data {
  padding: 72px 0 80px;
  background: var(--c-light);
}

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

.page-about .about-data-heading .section-title {
  margin-bottom: 16px;
}

.page-about .about-data-heading p:last-child {
  max-width: 46ch;
  color: var(--c-gray);
  font-size: 0.98rem;
}

.page-about .about-data-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.page-about .about-data-stat {
  background: var(--c-white);
  padding: 26px 20px 20px;
  position: relative;
  border: 1px solid var(--c-border);
  box-shadow: var(--shadow-sm);
}

.page-about .about-data-stat::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--c-accent);
  transform: skewY(-45deg) translateY(2px);
  transform-origin: top;
}

.page-about .about-data-stat .stat-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--c-gray);
  display: block;
}

.page-about .about-data-stat .data-number {
  font-family: var(--font-headline);
  font-size: clamp(2.8rem, 7vw, 4.2rem);
  font-weight: 700;
  line-height: 1;
  color: var(--c-primary);
  display: flex;
  align-items: baseline;
  gap: 2px;
  margin-top: 10px;
}

.page-about .about-data-stat .data-unit {
  font-size: 0.5em;
  color: var(--c-gold);
  font-weight: 700;
}

.page-about .about-data-media {
  margin-top: 8px;
  overflow: hidden;
}

.page-about .about-data-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 16 / 9;
}

/* 团队与运营 */
.page-about .about-team {
  background: var(--c-primary);
  padding: 72px 0 88px;
  color: var(--c-white);
}

.page-about .about-team-grid {
  display: grid;
  gap: 28px;
  align-items: center;
}

.page-about .about-team-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-about .about-team-copy p {
  color: rgba(255, 255, 255, 0.78);
  max-width: 60ch;
}

.page-about .about-team-copy p + p {
  margin-top: 16px;
}

.page-about .about-team-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

/* 资质与保障 */
.page-about .about-qualification {
  padding: 72px 0 80px;
  background: var(--c-light);
}

.page-about .about-qualification-grid {
  display: grid;
  gap: 20px;
}

.page-about .about-qual-card {
  background: var(--c-white);
  border: 1px solid var(--c-border);
  padding: 28px 24px;
  position: relative;
  box-shadow: var(--shadow-sm);
}

.page-about .about-qual-card::after {
  content: "";
  position: absolute;
  right: 0;
  top: 0;
  width: 40px;
  height: 4px;
  background: var(--c-gold);
}

.page-about .about-qual-card h3 {
  font-family: var(--font-headline);
  font-size: 1.2rem;
  margin: 0 0 12px;
  color: var(--c-primary);
}

.page-about .about-qual-card p {
  color: var(--c-gray);
  font-size: 0.94rem;
  margin: 0;
}

.page-about .about-qual-card p + p {
  margin-top: 10px;
}

.page-about .about-qual-card a {
  color: var(--c-accent);
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* 服务承诺 */
.page-about .about-commitment {
  background: var(--c-primary);
  color: var(--c-white);
  padding: 72px 0 88px;
  position: relative;
  overflow: hidden;
}

.page-about .about-commitment::before {
  content: "";
  position: absolute;
  left: -60px;
  bottom: -60px;
  width: 240px;
  height: 240px;
  border: 2px solid rgba(0, 229, 255, 0.25);
  transform: rotate(45deg);
  pointer-events: none;
}

.page-about .about-commitment::after {
  content: "";
  position: absolute;
  right: -20px;
  top: -20px;
  width: 180px;
  height: 180px;
  border: 2px solid rgba(255, 107, 0, 0.35);
  transform: rotate(20deg);
  pointer-events: none;
}

.page-about .about-commitment-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.page-about .about-commitment .section-kicker {
  color: var(--c-electric);
}

.page-about .about-commitment .section-kicker::before {
  background: var(--c-electric);
}

.page-about .about-commitment .section-title {
  color: var(--c-white);
  margin-bottom: 18px;
}

.page-about .about-commitment-lead {
  max-width: 64ch;
  color: rgba(255, 255, 255, 0.82);
  margin: 0 auto 28px;
}

.page-about .about-commitment-list {
  display: grid;
  gap: 12px;
  margin-bottom: 32px;
  width: 100%;
  max-width: 620px;
  text-align: left;
}

.page-about .about-commitment-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.96rem;
  color: rgba(255, 255, 255, 0.86);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding-bottom: 12px;
}

.page-about .about-commitment-item::before {
  content: "";
  flex: 0 0 8px;
  width: 8px;
  height: 8px;
  margin-top: 8px;
  background: var(--c-gold);
  transform: rotate(45deg);
}

.page-about .about-commitment-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
}

.page-about .btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 0.2s var(--about-ease), box-shadow 0.2s var(--about-ease), background 0.2s var(--about-ease), border-color 0.2s var(--about-ease), color 0.2s var(--about-ease);
}

.page-about .btn-accent {
  background: var(--c-accent);
  color: var(--c-white);
  box-shadow: 0 6px 20px rgba(255, 107, 0, 0.3);
}

.page-about .btn-accent:hover {
  transform: translateY(-2px);
}

.page-about .btn-outline {
  border-color: rgba(255, 255, 255, 0.35);
  color: var(--c-white);
}

.page-about .btn-outline:hover {
  border-color: var(--c-electric);
  color: var(--c-electric);
  transform: translateY(-2px);
}

.page-about .btn-caret {
  display: inline-block;
  transition: transform 0.2s var(--about-ease);
}

.page-about .btn:hover .btn-caret {
  transform: translateX(3px);
}

/* 响应式增强 */
@media (min-width: 768px) {
  .page-about .about-mission-grid {
    grid-template-columns: 1fr 0.4fr;
    gap: 48px;
  }

  .page-about .about-commitment-list {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px 32px;
    max-width: 860px;
  }
}

@media (min-width: 900px) {
  .page-about .about-section-heading {
    margin-bottom: 40px;
  }

  .page-about .about-hero-inner {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
    gap: 48px;
    min-height: 480px;
  }

  .page-about .about-timeline-item {
    grid-template-columns: 220px 1fr;
    gap: 48px;
    padding-bottom: 16px;
  }

  .page-about .about-timeline-item:not(:last-child)::before {
    left: 244px;
    top: 44px;
    bottom: -16px;
  }

  .page-about .about-timeline-year {
    font-size: 2.6rem;
    justify-content: flex-end;
    padding: 8px 24px 0 0;
  }

  .page-about .about-timeline-year::before {
    left: auto;
    right: -5px;
  }

  .page-about .about-data-grid {
    grid-template-columns: 0.9fr 1.1fr;
    align-items: center;
    gap: 48px;
  }

  .page-about .about-data-media {
    grid-column: 1 / -1;
    margin-top: 12px;
  }

  .page-about .about-team-grid {
    grid-template-columns: 0.85fr 1.15fr;
    gap: 56px;
  }

  .page-about .about-qualification-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
  }

  .page-about .about-commitment {
    padding: 88px 0 96px;
  }

  .page-about .about-commitment-actions {
    margin-top: 6px;
  }
}