/* ===== 品牌档案页面专属样式 ===== */
.page-about {
  background-color: var(--deep-space-blue);
  color: var(--plasma-white);
  overflow-x: hidden;
  overflow-x: clip;
}

.page-about img {
  max-width: 100%;
  height: auto;
}

/* 面包屑 */
.page-about .breadcrumb {
  padding-top: var(--space-md);
}
.page-about .breadcrumb-link {
  color: var(--muted-blue);
  text-decoration: none;
  transition: color 0.2s ease;
}
.page-about .breadcrumb-link:hover {
  color: var(--cosmic-orange-red);
}
.page-about .breadcrumb-item[aria-current="page"] .breadcrumb-link {
  color: var(--plasma-white);
}

/* 首屏 */
.page-about .about-hero {
  position: relative;
  padding: var(--space-xl) 0 0;
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: min(48vw, 34rem);
  height: min(48vw, 34rem);
  background: radial-gradient(circle, rgba(255, 77, 0, 0.16), transparent 66%);
  pointer-events: none;
}
.page-about .about-hero-inner {
  display: grid;
  gap: var(--space-lg);
  align-items: center;
}
.page-about .about-hero-copy .section-kicker {
  margin-bottom: var(--space-sm);
}
.page-about .about-hero h1 {
  font-family: var(--font-heading);
  font-size: clamp(2.6rem, 6.5vw, 5.25rem);
  line-height: 1.02;
  letter-spacing: -0.02em;
  margin: 0 0 var(--space-md);
  color: var(--plasma-white);
}
.page-about .about-hero-lead {
  font-family: var(--font-body);
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--muted-blue);
  max-width: 44rem;
  margin: 0 0 var(--space-lg);
}
.page-about .about-hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}
.page-about .about-hero-figure {
  margin: 0;
  position: relative;
  border: 2px solid var(--metallic-silver);
  box-shadow: var(--shadow-lg);
  background: var(--nebula-glow);
  transform: rotate(0.4deg);
  transition: transform 0.4s ease;
}
.page-about .about-hero-figure:hover {
  transform: rotate(0deg);
}
.page-about .about-hero-figure img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}
.page-about .about-hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: var(--space-xl);
  border-top: 1px solid rgba(192, 192, 192, 0.35);
  border-bottom: 1px solid rgba(192, 192, 192, 0.35);
}
.page-about .about-hero-stat {
  padding: var(--space-md) var(--space-sm);
  text-align: center;
}
.page-about .about-hero-stat + .about-hero-stat {
  border-left: 1px solid rgba(192, 192, 192, 0.35);
}
.page-about .about-stat-num {
  display: block;
  font-family: var(--font-data);
  font-size: clamp(2rem, 6vw, 4rem);
  font-weight: 800;
  line-height: 1;
  color: var(--cosmic-orange-red);
}
.page-about .about-stat-label {
  display: block;
  margin-top: var(--space-xs);
  color: var(--muted-blue);
  font-size: 0.875rem;
  letter-spacing: 0.08em;
}

/* 使命区 */
.page-about .about-mission-grid {
  display: grid;
  gap: var(--space-lg);
}
.page-about .about-mission-index {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  font-family: var(--font-data);
  font-size: 4.5rem;
  font-weight: 800;
  line-height: 0.8;
  letter-spacing: 0.04em;
  color: var(--nebula-glow);
  -webkit-text-stroke: 1px var(--metallic-silver);
}
.page-about .about-mission-index span:last-child {
  font-family: var(--font-body);
  font-size: 0.75rem;
  letter-spacing: 0.35em;
  color: var(--cosmic-orange-red);
  -webkit-text-stroke: 0;
}
.page-about .about-mission-body .section-kicker {
  margin-bottom: var(--space-sm);
}
.page-about .about-mission-body .section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: var(--space-md);
}
.page-about .about-mission-body p {
  color: var(--muted-blue);
  line-height: 1.8;
  max-width: 52rem;
}
.page-about .about-mission-body p + p {
  margin-top: var(--space-sm);
}
.page-about .about-mission-badge {
  margin-top: var(--space-lg);
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.5rem;
  border: 2px solid var(--cosmic-orange-red);
  background: linear-gradient(135deg, rgba(255, 77, 0, 0.12), transparent);
  box-shadow: var(--shadow-md);
  color: var(--plasma-white);
}
.page-about .about-mission-badge span {
  font-size: 0.9375rem;
  color: var(--plasma-white);
}
.page-about .about-mission-badge strong {
  font-family: var(--font-data);
  font-size: 1.75rem;
  color: var(--cosmic-orange-red);
  white-space: nowrap;
}
.page-about .about-mission-badge em {
  font-style: normal;
  margin-left: 0.25rem;
  color: var(--plasma-white);
}

/* 发展里程碑 */
.page-about .about-timeline-section {
  position: relative;
  background: linear-gradient(180deg, rgba(43, 58, 103, 0.18), rgba(10, 17, 40, 0) 60%);
}
.page-about .about-timeline-section .section-sub {
  max-width: 44rem;
}
.page-about .about-timeline-wrap {
  position: relative;
  margin-top: var(--space-xl);
}
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}
.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 0.375rem;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--cosmic-orange-red) 0%, rgba(255, 77, 0, 0.2) 55%, var(--nebula-glow) 100%);
}
.page-about .about-timeline-item {
  position: relative;
  padding-left: 2.75rem;
  padding-bottom: var(--space-xl);
  display: grid;
  gap: var(--space-sm);
}
.page-about .about-timeline-item:last-child {
  padding-bottom: 0;
}
.page-about .about-timeline-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.45rem;
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 50%;
  background: var(--cosmic-orange-red);
  box-shadow: 0 0 0 4px rgba(255, 77, 0, 0.14), 0 0 24px rgba(255, 77, 0, 0.55);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.page-about .about-timeline-item:hover::before {
  transform: scale(1.2);
  box-shadow: 0 0 0 8px rgba(255, 77, 0, 0.25), 0 0 40px rgba(255, 77, 0, 0.8);
}
.page-about .about-timeline-year {
  display: block;
  font-family: var(--font-data);
  font-size: clamp(3rem, 6vw, 5rem);
  font-weight: 800;
  line-height: 0.9;
  color: var(--plasma-white);
  transition: color 0.3s ease;
}
.page-about .about-timeline-item:hover .about-timeline-year {
  color: var(--cosmic-orange-red);
}
.page-about .about-timeline-tag {
  display: inline-block;
  margin-top: var(--space-xs);
  padding: 0.25rem 0.5rem;
  border: 1px solid var(--cosmic-orange-red);
  color: var(--cosmic-orange-red);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
}
.page-about .about-timeline-card {
  border: 2px solid rgba(192, 192, 192, 0.65);
  background: rgba(43, 58, 103, 0.2);
  padding: 1.5rem 1.25rem;
  box-shadow: var(--shadow-md);
  transition: transform 0.3s ease, border-color 0.3s ease, background 0.3s ease;
}
.page-about .about-timeline-item:hover .about-timeline-card {
  transform: translateX(6px);
  border-color: var(--cosmic-orange-red);
  background: rgba(43, 58, 103, 0.4);
}
.page-about .about-timeline-card h3 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  margin: 0 0 0.5rem;
  color: var(--plasma-white);
}
.page-about .about-timeline-card p {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--muted-blue);
  margin: 0 0 1rem;
}
.page-about .about-timeline-version {
  display: block;
  border-top: 1px dashed rgba(192, 192, 192, 0.4);
  padding-top: 0.75rem;
  font-family: var(--font-data);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--metallic-silver);
  transition: color 0.3s ease;
}
.page-about .about-timeline-item:hover .about-timeline-version {
  color: var(--cosmic-orange-red);
}

/* 时间线配图 */
.page-about .about-timeline-media {
  margin-top: var(--space-xl);
  border: 2px solid var(--metallic-silver);
  box-shadow: var(--shadow-lg);
  background: var(--nebula-glow);
  overflow: hidden;
}
.page-about .about-timeline-media img {
  display: block;
  width: 100%;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

/* 服务与覆盖 */
.page-about .about-service {
  position: relative;
}
.page-about .about-service::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--cosmic-orange-red), transparent 80%);
}
.page-about .about-service-grid {
  display: grid;
  gap: var(--space-md);
  margin-top: var(--space-xl);
}
.page-about .about-service-card {
  border: 2px solid rgba(192, 192, 192, 0.5);
  background: rgba(10, 17, 40, 0.6);
  padding: var(--space-lg) var(--space-md);
  box-shadow: var(--shadow-md);
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
.page-about .about-service-card:hover {
  transform: translateY(-4px);
  border-color: var(--cosmic-orange-red);
  box-shadow: var(--shadow-lg);
}
.page-about .about-service-num {
  display: block;
  font-family: var(--font-data);
  font-size: clamp(2.75rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1;
  color: var(--cosmic-orange-red);
  margin-bottom: var(--space-sm);
}
.page-about .about-service-card h3 {
  font-family: var(--font-heading);
  font-size: 1.375rem;
  margin: 0 0 0.5rem;
  color: var(--plasma-white);
}
.page-about .about-service-card p {
  margin: 0;
  color: var(--muted-blue);
  font-size: 0.9375rem;
  line-height: 1.7;
}
.page-about .about-service-devices {
  position: relative;
  margin-top: var(--space-xl);
  border: 2px solid var(--metallic-silver);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  background: var(--nebula-glow);
}
.page-about .about-service-devices img {
  display: block;
  width: 100%;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}
.page-about .about-service-devices-caption {
  display: inline-block;
  margin: var(--space-sm);
  padding: 0.75rem 1rem;
  background: var(--match-ink);
  border: 2px solid var(--cosmic-orange-red);
  box-shadow: var(--shadow-md);
  line-height: 1.3;
}
.page-about .about-service-devices-caption span {
  display: block;
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: var(--metallic-silver);
}
.page-about .about-service-devices-caption strong {
  font-family: var(--font-data);
  font-size: 1.5rem;
  color: var(--cosmic-orange-red);
}

/* 版本与迭代哲学 */
.page-about .about-philosophy-grid {
  display: grid;
  gap: var(--space-lg);
}
.page-about .about-philosophy-index {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  font-family: var(--font-data);
  font-size: 4.5rem;
  font-weight: 800;
  line-height: 0.8;
  letter-spacing: 0.04em;
  color: var(--nebula-glow);
  -webkit-text-stroke: 1px var(--metallic-silver);
}
.page-about .about-philosophy-index span:last-child {
  font-family: var(--font-body);
  font-size: 0.75rem;
  letter-spacing: 0.35em;
  color: var(--cosmic-orange-red);
  -webkit-text-stroke: 0;
}
.page-about .about-philosophy-body .section-kicker {
  margin-bottom: var(--space-sm);
}
.page-about .about-philosophy-body .section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: var(--space-md);
}
.page-about .about-philosophy-body p {
  color: var(--muted-blue);
  line-height: 1.8;
  max-width: 52rem;
}
.page-about .about-philosophy-body p + p {
  margin-top: var(--space-sm);
}
.page-about .about-speed-compare {
  margin-top: var(--space-lg);
  border: 2px solid rgba(192, 192, 192, 0.4);
  background: rgba(10, 17, 40, 0.5);
  padding: var(--space-md);
  display: grid;
  gap: var(--space-sm);
  max-width: 52rem;
}
.page-about .about-speed-row {
  display: grid;
  grid-template-columns: 9rem 1fr;
  gap: var(--space-sm);
  align-items: center;
}
.page-about .about-speed-label {
  font-size: 0.8125rem;
  color: var(--metallic-silver);
  text-align: right;
}
.page-about .about-speed-track {
  height: 1.125rem;
  background: rgba(192, 192, 192, 0.16);
  border-radius: 2px;
  overflow: hidden;
}
.page-about .about-speed-fill {
  display: block;
  height: 100%;
  border-radius: 2px;
}
.page-about .about-speed-fill-old {
  width: 100%;
  background: linear-gradient(90deg, var(--metallic-silver), var(--muted-blue));
}
.page-about .about-speed-fill-new {
  width: 25%;
  background: var(--gradient-sport);
  box-shadow: 0 0 16px rgba(255, 77, 0, 0.6);
}
.page-about .about-philosophy-quote {
  margin: var(--space-lg) 0 0;
  padding: var(--space-md) var(--space-lg);
  border-left: 4px solid var(--cosmic-orange-red);
  background: linear-gradient(135deg, rgba(255, 77, 0, 0.1), rgba(43, 58, 103, 0.2));
  font-family: var(--font-heading);
  font-size: 1.375rem;
  line-height: 1.6;
  color: var(--plasma-white);
  max-width: 44rem;
}

/* 信任与责任 */
.page-about .about-trust {
  background: linear-gradient(180deg, transparent, rgba(43, 58, 103, 0.3));
}
.page-about .about-trust-grid {
  display: grid;
  gap: var(--space-md);
  margin-top: var(--space-xl);
}
.page-about .about-trust-item {
  border: 1px solid rgba(192, 192, 192, 0.3);
  background: rgba(43, 58, 103, 0.12);
  padding: var(--space-md);
}
.page-about .about-trust-item h3 {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  color: var(--cosmic-orange-red);
  margin: 0 0 0.5rem;
}
.page-about .about-trust-item p {
  margin: 0;
  color: var(--muted-blue);
  line-height: 1.7;
  font-size: 0.9375rem;
}
.page-about .about-trust-cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-xl);
}

/* 平板与桌面增强 */
@media (min-width: 768px) {
  .page-about .about-hero-inner {
    grid-template-columns: 7fr 5fr;
  }
  .page-about .about-hero-figure {
    transform: rotate(0.6deg);
  }
  .page-about .about-timeline-item {
    grid-template-columns: 12rem 1fr;
    gap: var(--space-lg);
  }
  .page-about .about-timeline-meta {
    text-align: right;
  }
  .page-about .about-timeline-tag {
    float: right;
    margin-top: 0.25rem;
  }
  .page-about .about-timeline-wrap::after {
    content: "";
    display: table;
    clear: both;
  }
  .page-about .about-trust-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 640px) {
  .page-about .about-service-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 992px) {
  .page-about .about-mission-grid,
  .page-about .about-philosophy-grid {
    grid-template-columns: 3fr 8fr;
  }
  .page-about .about-service-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  .page-about .about-service-card:nth-child(even) {
    margin-top: var(--space-lg);
  }
  .page-about .about-service-devices-caption {
    position: absolute;
    right: var(--space-md);
    bottom: var(--space-md);
    margin: 0;
  }
}

@media (min-width: 1200px) {
  .page-about .about-hero {
    padding-top: var(--space-2xl);
  }
  .page-about .about-timeline-item {
    grid-template-columns: 14rem 1fr;
  }
}