/* ===== page-about 专属样式 ===== */
.page-about {
  --story-overlay: rgba(26, 42, 58, 0.65);
  --card-flip-speed: 0.6s;
  --hero-min-height: 520px;
  --section-spacing: var(--space-3xl);
  position: relative;
  background-color: var(--color-secondary);
  color: var(--color-white);
}

/* 面包屑导航 */
.page-about .breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  max-width: var(--max-width);
  margin: 0 auto;
  font-family: var(--font-body);
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.6);
}

.page-about .breadcrumb a {
  color: var(--color-accent-purple);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.page-about .breadcrumb a:hover {
  color: var(--color-primary);
}

.page-about .breadcrumb-sep {
  color: rgba(255, 255, 255, 0.3);
}

.page-about .breadcrumb [aria-current="page"] {
  color: var(--color-white);
  font-weight: var(--weight-bold);
}

/* 首屏框景 —— 品牌主场 */
.page-about .hero-frame {
  min-height: var(--hero-min-height);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  background: linear-gradient(145deg, var(--color-secondary) 0%, #0f1a26 100%);
  border-color: var(--color-accent-purple);
  padding: var(--space-2xl) var(--space-lg);
  margin-bottom: 0;
}

.page-about .hero-frame .frame-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xl);
  width: 100%;
  max-width: var(--max-width);
}

.page-about .hero-brand {
  text-align: center;
}

.page-about .hero-brand h1 {
  font-family: var(--font-heading);
  font-size: clamp(3rem, 12vw, 6rem);
  font-weight: var(--weight-heading);
  letter-spacing: 0.04em;
  color: var(--color-white);
  line-height: 1.1;
  margin: 0;
}

.page-about .hero-brand-accent {
  color: var(--color-primary);
}

.page-about .hero-tagline {
  font-family: var(--font-body);
  font-size: clamp(1.1rem, 3vw, 1.75rem);
  font-weight: var(--weight-bold);
  color: var(--color-accent-green);
  letter-spacing: 0.3em;
  margin-top: var(--space-sm);
  text-transform: uppercase;
}

.page-about .hero-note {
  color: rgba(255, 255, 255, 0.4);
  font-family: var(--font-body);
  font-size: 0.8rem;
  letter-spacing: 0.15em;
}

.page-about .hero-note-right {
  writing-mode: vertical-rl;
  text-orientation: mixed;
}

/* 首屏指标 */
.page-about .hero-metrics {
  display: flex;
  gap: var(--space-xl);
  margin-top: var(--space-xl);
  padding: var(--space-md) var(--space-lg);
  border-top: 1px solid rgba(155, 89, 182, 0.3);
  border-bottom: 1px solid rgba(155, 89, 182, 0.3);
  background: rgba(26, 42, 58, 0.4);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border-radius: var(--border-radius-md);
}

.page-about .hero-metric-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
}

.page-about .hero-metric-num {
  font-family: var(--font-mono);
  font-size: 2.2rem;
  font-weight: var(--weight-heading);
  color: var(--color-primary);
  line-height: 1;
}

.page-about .hero-metric-label {
  font-family: var(--font-body);
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.7);
  letter-spacing: 0.1em;
}

/* 章节统一 */
.page-about .section {
  padding: var(--section-spacing) var(--space-lg);
  max-width: var(--max-width);
  margin: 0 auto;
  position: relative;
}

.page-about .section-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
  border-bottom: 2px solid rgba(155, 89, 182, 0.25);
  padding-bottom: var(--space-md);
}

.page-about .section-number {
  font-family: var(--font-heading);
  font-size: 4rem;
  font-weight: var(--weight-heading);
  color: var(--color-accent-purple);
  line-height: 1;
  letter-spacing: -0.02em;
  opacity: 0.85;
}

.page-about .section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 5vw, 3rem);
  font-weight: var(--weight-heading);
  color: var(--color-white);
  letter-spacing: 0.05em;
  margin: 0;
}

.page-about .section-subtitle {
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--color-accent-green);
  letter-spacing: 0.15em;
  margin-left: auto;
  align-self: flex-end;
  padding-bottom: 0.2rem;
  white-space: nowrap;
}

/* 01 品牌故事 */
.page-about .story-section {
  position: relative;
}

.page-about .story-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
  align-items: center;
}

.page-about .story-text {
  padding: var(--space-lg) var(--space-xl);
  background: var(--story-overlay);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--border-radius-lg);
  color: var(--color-white);
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.7;
  position: relative;
  z-index: 2;
}

.page-about .story-text p + p {
  margin-top: var(--space-md);
}

.page-about .story-visual {
  position: relative;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  max-height: 320px;
}

.page-about .story-bg-img {
  width: 100%;
  height: auto;
  max-height: 320px;
  object-fit: cover;
  display: block;
  border-radius: var(--border-radius-lg);
  opacity: 0.85;
}

/* 斜切分隔 */
.page-about .skew-divider {
  height: 60px;
  width: 100%;
  background: linear-gradient(135deg, var(--color-accent-purple) 0%, transparent 60%);
  clip-path: polygon(0 0, 100% 20%, 100% 100%, 0 80%);
  margin: 0;
  opacity: 0.4;
}

.page-about .skew-divider-reverse {
  background: linear-gradient(225deg, var(--color-primary) 0%, transparent 60%);
  clip-path: polygon(0 20%, 100% 0, 100% 80%, 0 100%);
}

/* 02 核心能力 */
.page-about .capabilities-section {
  background: rgba(15, 26, 38, 0.5);
  border-radius: var(--border-radius-xl);
  padding: var(--space-2xl) var(--space-lg);
  margin: 0 var(--space-md);
}

.page-about .capabilities-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.page-about .cap-card {
  perspective: 1000px;
  height: 240px;
}

.page-about .cap-card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform var(--card-flip-speed) cubic-bezier(0.23, 1, 0.32, 1);
  transform-style: preserve-3d;
}

.page-about .cap-card:hover .cap-card-inner,
.page-about .cap-card[data-flip-open] .cap-card-inner {
  transform: rotateY(180deg);
}

.page-about .cap-card-front,
.page-about .cap-card-back {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: var(--space-lg);
  border-radius: var(--border-radius-lg);
  text-align: center;
}

.page-about .cap-card-front {
  background: rgba(26, 42, 58, 0.6);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  z-index: 2;
}

.page-about .cap-card-back {
  background: var(--color-secondary-light);
  border: 1px solid var(--color-accent-purple);
  transform: rotateY(180deg);
  color: var(--color-white);
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: 1.6;
  text-align: left;
  padding: var(--space-md) var(--space-lg);
}

.page-about .cap-card-icon {
  font-size: 2.5rem;
  margin-bottom: var(--space-sm);
  display: block;
}

.page-about .cap-card-front h3 {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  color: var(--color-primary);
  margin: 0 0 var(--space-xs);
  letter-spacing: 0.04em;
}

.page-about .cap-card-front p {
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.7);
  margin: 0;
}

.page-about .capabilities-visual {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  margin-top: var(--space-lg);
}

.page-about .capabilities-img {
  width: 100%;
  max-width: 600px;
  height: auto;
  border-radius: var(--border-radius-md);
  object-fit: cover;
  border: 1px solid rgba(155, 89, 182, 0.3);
}

.page-about .cap-note {
  color: var(--color-accent-purple);
  font-family: var(--font-body);
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  opacity: 0.6;
}

/* 03 技术保障 */
.page-about .tech-section {
  padding-top: var(--space-2xl);
}

.page-about .tech-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
  align-items: center;
}

.page-about .tech-text {
  padding: var(--space-lg) var(--space-xl);
  background: rgba(26, 42, 58, 0.5);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(57, 255, 20, 0.15);
  border-radius: var(--border-radius-lg);
  color: var(--color-white);
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.7;
}

.page-about .tech-text p + p {
  margin-top: var(--space-md);
}

.page-about .tech-highlight {
  color: var(--color-primary);
  font-weight: var(--weight-bold);
  font-family: var(--font-mono);
}

.page-about .tech-list {
  list-style: none;
  padding: 0;
  margin: var(--space-lg) 0 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.page-about .tech-list li {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.85);
}

.page-about .tech-list-icon {
  color: var(--color-accent-green);
  font-weight: var(--weight-bold);
  font-size: 1.1rem;
}

.page-about .tech-visual {
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255, 107, 53, 0.2);
}

.page-about .tech-img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  max-height: 400px;
}

/* 内部链接导航 */
.page-about .internal-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  justify-content: center;
  padding: var(--space-2xl) var(--space-lg);
  max-width: var(--max-width);
  margin: 0 auto;
}

.page-about .internal-links .btn {
  padding: var(--space-sm) var(--space-xl);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: var(--weight-bold);
  border-radius: var(--border-radius-md);
  text-decoration: none;
  transition: all var(--transition-base);
  letter-spacing: 0.05em;
}

.page-about .internal-links .btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
  border: 2px solid var(--color-primary);
}

.page-about .internal-links .btn-primary:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 107, 53, 0.3);
}

.page-about .internal-links .btn-outline {
  background: transparent;
  color: var(--color-accent-purple);
  border: 2px solid var(--color-accent-purple);
}

.page-about .internal-links .btn-outline:hover {
  background: var(--color-accent-purple);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(155, 89, 182, 0.3);
}

/* 响应式 —— 平板 */
@media (min-width: 768px) {
  .page-about .hero-frame {
    --hero-min-height: 580px;
  }

  .page-about .hero-metrics {
    gap: var(--space-2xl);
    padding: var(--space-md) var(--space-2xl);
  }

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

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

  .page-about .story-visual {
    max-height: 360px;
  }

  .page-about .story-bg-img {
    max-height: 360px;
  }

  .page-about .capabilities-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about .cap-card {
    height: 260px;
  }

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

  .page-about .tech-img {
    max-height: 340px;
  }

  .page-about .internal-links {
    gap: var(--space-lg);
  }
}

/* 响应式 —— 桌面 */
@media (min-width: 1024px) {
  .page-about .hero-frame {
    --hero-min-height: 640px;
  }

  .page-about .hero-metric-num {
    font-size: 3.2rem;
  }

  .page-about .capabilities-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .cap-card {
    height: 280px;
  }

  .page-about .cap-card-back {
    font-size: 1rem;
  }

  .page-about .capabilities-visual {
    justify-content: center;
  }

  .page-about .tech-img {
    max-height: 400px;
  }

  .page-about .story-text {
    font-size: 1.1rem;
  }
}

/* 小屏安全 */
@media (max-width: 480px) {
  .page-about .hero-frame {
    padding: var(--space-xl) var(--space-md);
    --hero-min-height: 440px;
  }

  .page-about .hero-brand h1 {
    font-size: 2.6rem;
  }

  .page-about .hero-metrics {
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-md);
  }

  .page-about .hero-metric-num {
    font-size: 1.6rem;
  }

  .page-about .section {
    padding: var(--space-xl) var(--space-md);
  }

  .page-about .section-number {
    font-size: 2.8rem;
  }

  .page-about .section-subtitle {
    font-size: 0.75rem;
    white-space: normal;
  }

  .page-about .cap-card {
    height: 210px;
  }

  .page-about .cap-card-front h3 {
    font-size: 1.4rem;
  }

  .page-about .tech-text {
    padding: var(--space-md);
  }

  .page-about .internal-links {
    flex-direction: column;
    align-items: center;
  }

  .page-about .internal-links .btn {
    width: 100%;
    max-width: 280px;
    text-align: center;
  }
}

/* 玻璃面板通用覆盖 */
.page-about .glass-panel {
  background: rgba(26, 42, 58, 0.45);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

/* 动画：实时指示器脉冲 */
.page-about .live-indicator {
  position: relative;
}

.page-about .live-indicator::after {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent-green);
  margin-left: 6px;
  animation: pulse-dot 1.5s ease-in-out infinite;
  vertical-align: middle;
}

@keyframes pulse-dot {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.4;
    transform: scale(0.7);
  }
}