/* ===== 品牌档案页面专属样式 ===== */
.page-about {
  --about-accent-glow: rgba(0, 212, 255, 0.08);
  --about-card-skew: -1.5deg;
  --about-timeline-node-size: 48px;
  --about-flow-opacity: 0.6;
  display: block;
  width: 100%;
  background-color: var(--color-primary, #0B1D3A);
  color: var(--color-warm-white, #F5F5F5);
  font-family: 'Inter', system-ui, sans-serif;
  line-height: 1.6;
}

.page-about .container {
  max-width: var(--max-width, 1200px);
  margin: 0 auto;
  padding: 0 var(--spacer-md, 1rem);
}

.page-about .section-padding {
  padding-top: var(--spacer-xl, 4rem);
  padding-bottom: var(--spacer-xl, 4rem);
}

/* 面包屑 */
.page-about .breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding-top: var(--spacer-md, 1rem);
  font-size: var(--font-small, 0.875rem);
  letter-spacing: 0.04em;
  opacity: 0.8;
  flex-wrap: wrap;
}

.page-about .breadcrumb .separator {
  color: var(--color-accent-purple, #7B2D8E);
  font-weight: 300;
}

.page-about .breadcrumb .current {
  color: var(--color-accent-yellow, #FFD700);
  font-weight: 600;
}

/* 节标题共用装饰 */
.page-about .section-label {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: var(--spacer-sm, 0.5rem);
}

.page-about .section-label .brand-divider {
  width: 2.5rem;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent-blue, #00D4FF), var(--color-accent-purple, #7B2D8E));
  flex-shrink: 0;
}

.page-about .section-label-text {
  font-size: var(--font-small, 0.875rem);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-soft-purple, #A55BEE);
  font-weight: 500;
}

.page-about .section-title {
  font-size: var(--font-h2, 1.75rem);
  font-weight: 800;
  letter-spacing: 0.05em;
  margin: 0 0 var(--spacer-sm, 0.5rem);
  background: linear-gradient(135deg, var(--color-warm-white, #F5F5F5), var(--color-accent-blue, #00D4FF));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.2;
}

/* ========== 分屏首屏 ========== */
.page-about .about-hero {
  display: flex;
  flex-direction: column;
  gap: var(--spacer-lg, 2rem);
  padding-top: var(--spacer-lg, 2rem);
  padding-bottom: var(--spacer-xl, 4rem);
  position: relative;
}

.page-about .about-hero-text {
  flex: 1 1 50%;
  z-index: 2;
}

.page-about .about-hero-heading {
  font-size: var(--font-h1, 2.5rem);
  font-weight: 800;
  letter-spacing: 0.03em;
  line-height: 1.15;
  margin: 0 0 var(--spacer-md, 1rem);
}

.page-about .about-hero-heading .glow-text {
  background: linear-gradient(135deg, var(--color-accent-yellow, #FFD700), var(--color-accent-blue, #00D4FF));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.page-about .about-hero-sub {
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--color-soft-purple, #A55BEE);
  margin: 0 0 var(--spacer-md, 1rem);
  letter-spacing: 0.02em;
  line-height: 1.5;
}

.page-about .about-hero-desc {
  font-size: var(--font-body, 1rem);
  color: rgba(245, 245, 245, 0.85);
  max-width: 600px;
  margin: 0 0 var(--spacer-lg, 2rem);
}

.page-about .about-hero-signature {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.page-about .about-hero-signature .brand-divider {
  width: 3rem;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent-yellow, #FFD700), var(--color-accent-purple, #7B2D8E));
  flex-shrink: 0;
}

.page-about .about-hero-motto {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--color-accent-yellow, #FFD700);
}

/* 首屏右侧视觉区 */
.page-about .about-hero-visual {
  flex: 1 1 50%;
  position: relative;
  min-height: 360px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.page-about .about-hero-map {
  width: 100%;
  max-width: 600px;
  height: auto;
  object-fit: contain;
  border-radius: 4px;
  position: relative;
  z-index: 1;
  filter: drop-shadow(0 0 30px rgba(0, 212, 255, 0.12));
}

.page-about .about-hero-data-dots {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 2;
}

.page-about .data-dot {
  position: absolute;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent-blue, #00D4FF);
  box-shadow: 0 0 12px var(--color-accent-blue, #00D4FF);
  animation: dotPulse 2.4s ease-in-out infinite;
}

@keyframes dotPulse {
  0%, 100% { opacity: 0.3; transform: scale(0.8); }
  50% { opacity: 1; transform: scale(1.4); }
}

.page-about .about-hero-flow-lines {
  position: absolute;
  inset: 0;
  z-index: 0;
  opacity: 0.5;
  pointer-events: none;
}

/* ========== 时间线区域（宽区） ========== */
.page-about .about-timeline {
  position: relative;
  border-top: 1px solid rgba(123, 45, 142, 0.25);
  border-bottom: 1px solid rgba(123, 45, 142, 0.25);
  background: linear-gradient(180deg, rgba(11, 29, 58, 0.6), rgba(123, 45, 142, 0.08));
}

.page-about .timeline-intro {
  color: rgba(245, 245, 245, 0.7);
  margin-bottom: var(--spacer-lg, 2rem);
  font-size: var(--font-body, 1rem);
}

.page-about .timeline-grid {
  display: flex;
  flex-direction: column;
  gap: var(--spacer-md, 1rem);
  position: relative;
  padding-left: calc(var(--about-timeline-node-size) + 1rem);
}

.page-about .timeline-grid::before {
  content: '';
  position: absolute;
  left: calc(var(--about-timeline-node-size) / 2);
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--color-accent-blue, #00D4FF), var(--color-accent-purple, #7B2D8E), var(--color-accent-yellow, #FFD700));
  opacity: 0.35;
}

.page-about .tl-node {
  display: flex;
  align-items: flex-start;
  gap: var(--spacer-md, 1rem);
  position: relative;
  cursor: default;
  padding: var(--spacer-sm, 0.5rem) 0;
  transition: all 0.25s ease;
}

.page-about .tl-node:focus-visible {
  outline: 2px solid var(--color-accent-yellow, #FFD700);
  outline-offset: 4px;
  border-radius: 4px;
}

.page-about .tl-node-marker {
  position: absolute;
  left: calc(-1 * var(--about-timeline-node-size) - 1rem + 4px);
  top: 1rem;
  width: var(--about-timeline-node-size);
  height: var(--about-timeline-node-size);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.page-about .tl-node-ring {
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  border: 2px solid var(--color-accent-blue, #00D4FF);
  opacity: 0.3;
  transition: all 0.3s ease;
}

.page-about .tl-node-core {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-accent-blue, #00D4FF);
  box-shadow: 0 0 12px var(--color-accent-blue, #00D4FF);
  transition: all 0.3s ease;
}

.page-about .tl-node:hover .tl-node-ring,
.page-about .tl-node:focus-within .tl-node-ring {
  opacity: 0.8;
  transform: scale(1.15);
  border-color: var(--color-accent-yellow, #FFD700);
}

.page-about .tl-node:hover .tl-node-core,
.page-about .tl-node:focus-within .tl-node-core {
  background: var(--color-accent-yellow, #FFD700);
  box-shadow: 0 0 20px var(--color-accent-yellow, #FFD700);
  transform: scale(1.2);
}

.page-about .tl-node-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.page-about .tl-node-version {
  font-size: var(--font-small, 0.875rem);
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-soft-purple, #A55BEE);
}

.page-about .tl-node-label {
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--color-warm-white, #F5F5F5);
}

.page-about .tl-node-detail {
  font-size: var(--font-small, 0.875rem);
  color: rgba(245, 245, 245, 0.65);
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, opacity 0.3s ease;
  opacity: 0;
}

.page-about .tl-node:hover .tl-node-detail,
.page-about .tl-node:focus-within .tl-node-detail,
.page-about .tl-node:focus .tl-node-detail {
  max-height: 6rem;
  opacity: 1;
  padding-top: 0.35rem;
}

.page-about .tl-node.current .tl-node-version {
  color: var(--color-accent-yellow, #FFD700);
}

.page-about .tl-node.current .tl-node-core {
  background: var(--color-accent-yellow, #FFD700);
  box-shadow: 0 0 20px var(--color-accent-yellow, #FFD700);
}

.page-about .timeline-visual-decor {
  display: flex;
  justify-content: flex-end;
  margin-top: var(--spacer-lg, 2rem);
}

.page-about .timeline-decor-img {
  width: 120px;
  height: auto;
  max-height: 120px;
  object-fit: contain;
  opacity: 0.7;
  border-radius: 4px;
}

/* ========== 核心能力（窄区卡片） ========== */
.page-about .about-capabilities {
  position: relative;
}

.page-about .capabilities-intro {
  color: rgba(245, 245, 245, 0.7);
  margin-bottom: var(--spacer-lg, 2rem);
  font-size: var(--font-body, 1rem);
}

.page-about .capabilities-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacer-md, 1rem);
}

.page-about .cap-card {
  display: flex;
  flex-direction: column;
  background: rgba(11, 29, 58, 0.6);
  border: 1px solid rgba(123, 45, 142, 0.2);
  border-radius: 4px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  overflow: hidden;
}

.page-about .cap-card:hover {
  transform: translateY(-4px) scale(1.01);
  box-shadow: 0 12px 32px rgba(0, 212, 255, 0.1);
  border-color: var(--color-accent-blue, #00D4FF);
}

.page-about .cap-card-1 {
  border-left: 3px solid var(--color-accent-blue, #00D4FF);
}

.page-about .cap-card-2 {
  border-left: 3px solid var(--color-accent-yellow, #FFD700);
}

.page-about .cap-card-3 {
  border-left: 3px solid var(--color-accent-purple, #7B2D8E);
}

.page-about .cap-card-4 {
  border-left: 3px solid var(--color-soft-purple, #A55BEE);
}

.page-about .cap-card-visual {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacer-md, 1rem);
  min-height: 120px;
}

.page-about .cap-card-img {
  width: 100%;
  max-width: 200px;
  height: auto;
  object-fit: contain;
  border-radius: 2px;
}

.page-about .cap-card-icon-wrap {
  padding: var(--spacer-sm, 0.5rem);
}

.page-about .cap-card-body {
  padding: var(--spacer-sm, 0.5rem) var(--spacer-md, 1rem) var(--spacer-md, 1rem);
}

.page-about .cap-card-title {
  font-size: var(--font-h3, 1.25rem);
  font-weight: 700;
  letter-spacing: 0.03em;
  margin: 0 0 0.35rem;
  color: var(--color-warm-white, #F5F5F5);
}

.page-about .cap-card-desc {
  font-size: var(--font-small, 0.875rem);
  color: rgba(245, 245, 245, 0.75);
  line-height: 1.5;
  margin: 0;
}

.page-about .capabilities-cta {
  margin-top: var(--spacer-lg, 2rem);
  text-align: center;
}

.page-about .btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.8rem;
  font-size: var(--font-body, 1rem);
  font-weight: 600;
  letter-spacing: 0.04em;
  border: none;
  border-radius: 2px;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.25s ease;
  font-family: inherit;
}

.page-about .btn-primary {
  background: var(--color-accent-yellow, #FFD700);
  color: var(--color-primary, #0B1D3A);
  box-shadow: 0 2px 12px rgba(255, 215, 0, 0.25);
}

.page-about .btn-primary:hover,
.page-about .btn-primary:focus-visible {
  background: var(--color-accent-blue, #00D4FF);
  color: var(--color-primary, #0B1D3A);
  box-shadow: 0 4px 20px rgba(0, 212, 255, 0.35);
  transform: translateY(-2px);
}

/* ========== 数据承诺（宽区） ========== */
.page-about .about-commitment {
  position: relative;
  background: linear-gradient(135deg, rgba(11, 29, 58, 0.8), rgba(123, 45, 142, 0.12));
  border-top: 1px solid rgba(0, 212, 255, 0.12);
  border-bottom: 1px solid rgba(0, 212, 255, 0.12);
}

.page-about .commitment-intro {
  color: rgba(245, 245, 245, 0.7);
  margin-bottom: var(--spacer-lg, 2rem);
  font-size: var(--font-body, 1rem);
}

.page-about .commitment-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacer-lg, 2rem);
}

.page-about .commit-item {
  text-align: center;
  padding: var(--spacer-md, 1rem);
  border-radius: 4px;
  background: rgba(11, 29, 58, 0.4);
  border: 1px solid rgba(0, 212, 255, 0.08);
  transition: all 0.3s ease;
}

.page-about .commit-item:hover {
  background: rgba(11, 29, 58, 0.7);
  border-color: rgba(0, 212, 255, 0.25);
  transform: translateY(-3px);
}

.page-about .commit-item-icon {
  margin-bottom: var(--spacer-sm, 0.5rem);
  display: flex;
  justify-content: center;
}

.page-about .commit-item-title {
  font-size: var(--font-h3, 1.25rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  margin: 0 0 0.5rem;
  color: var(--color-warm-white, #F5F5F5);
}

.page-about .commit-item-desc {
  font-size: var(--font-small, 0.875rem);
  color: rgba(245, 245, 245, 0.7);
  line-height: 1.6;
  max-width: 320px;
  margin: 0 auto;
}

.page-about .commitment-cta {
  margin-top: var(--spacer-lg, 2rem);
  text-align: center;
}

/* ========== 品牌声明尾区 ========== */
.page-about .about-statement {
  padding: var(--spacer-xl, 4rem) 0;
}

.page-about .statement-box {
  background: rgba(11, 29, 58, 0.5);
  border: 1px solid rgba(255, 215, 0, 0.12);
  border-radius: 4px;
  padding: var(--spacer-lg, 2rem);
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%);
}

.page-about .statement-text {
  font-size: 1rem;
  line-height: 1.7;
  color: rgba(245, 245, 245, 0.85);
  margin: 0 0 var(--spacer-md, 1rem);
}

.page-about .statement-contact {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: var(--font-small, 0.875rem);
  color: rgba(245, 245, 245, 0.6);
}

.page-about .statement-contact-item {
  letter-spacing: 0.02em;
}

.page-about .statement-contact-item a {
  color: var(--color-accent-yellow, #FFD700);
  text-decoration: none;
}

.page-about .statement-contact-item a:hover {
  color: var(--color-accent-blue, #00D4FF);
  text-decoration: underline;
}

/* ========== 响应式：桌面端 ≥768px ========== */
@media (min-width: 768px) {
  .page-about .container {
    padding: 0 var(--spacer-lg, 2rem);
  }

  .page-about .about-hero {
    flex-direction: row;
    align-items: center;
    gap: var(--spacer-xl, 4rem);
    padding-top: var(--spacer-xl, 4rem);
  }

  .page-about .about-hero-heading {
    font-size: 2.8rem;
  }

  .page-about .about-hero-visual {
    min-height: 420px;
  }

  .page-about .about-hero-map {
    max-width: 100%;
  }

  .page-about .timeline-grid {
    flex-direction: row;
    gap: var(--spacer-lg, 2rem);
    padding-left: 0;
    justify-content: space-between;
  }

  .page-about .timeline-grid::before {
    left: 0;
    right: 0;
    top: calc(var(--about-timeline-node-size) / 2);
    bottom: auto;
    width: auto;
    height: 2px;
    background: linear-gradient(90deg, var(--color-accent-blue, #00D4FF), var(--color-accent-purple, #7B2D8E), var(--color-accent-yellow, #FFD700));
  }

  .page-about .tl-node {
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--spacer-md, 1rem) var(--spacer-sm, 0.5rem);
    flex: 1;
  }

  .page-about .tl-node-marker {
    position: relative;
    left: auto;
    top: auto;
    margin-bottom: var(--spacer-sm, 0.5rem);
  }

  .page-about .tl-node-content {
    align-items: center;
  }

  .page-about .tl-node-detail {
    max-height: none;
    opacity: 0.7;
    padding-top: 0.35rem;
    transition: opacity 0.3s ease;
  }

  .page-about .tl-node:hover .tl-node-detail,
  .page-about .tl-node:focus-within .tl-node-detail {
    opacity: 1;
  }

  .page-about .timeline-decor-img {
    width: 160px;
    max-height: 160px;
  }

  .page-about .capabilities-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacer-lg, 2rem);
  }

  .page-about .cap-card {
    flex-direction: row;
  }

  .page-about .cap-card-visual {
    flex: 0 0 160px;
    padding: var(--spacer-md, 1rem);
  }

  .page-about .cap-card-img {
    max-width: 160px;
  }

  .page-about .cap-card-body {
    flex: 1;
    padding: var(--spacer-md, 1rem) var(--spacer-md, 1rem) var(--spacer-md, 0);
  }

  .page-about .commitment-grid {
    grid-template-columns: 1fr 1fr 1fr;
    gap: var(--spacer-lg, 2rem);
  }

  .page-about .statement-contact {
    flex-direction: row;
    justify-content: center;
    gap: var(--spacer-lg, 2rem);
  }

  .page-about .section-title {
    font-size: var(--font-h1, 2.5rem);
  }
}

/* ========== 桌面端 ≥1024px 额外优化 ========== */
@media (min-width: 1024px) {
  .page-about .about-hero-heading {
    font-size: 3.2rem;
  }

  .page-about .capabilities-grid {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .commitment-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }
}

/* ========== 窄屏安全 ========== */
@media (max-width: 480px) {
  .page-about .about-hero-map {
    max-width: 100%;
    height: auto;
  }

  .page-about .timeline-decor-img {
    width: 80px;
    max-height: 80px;
  }

  .page-about .cap-card-img {
    max-width: 140px;
  }

  .page-about .statement-box {
    padding: var(--spacer-md, 1rem);
  }
}