/* =============================================
   page-about 专属样式
   作用域限定 .page-about 内，避免污染共享区域
   ============================================= */
.page-about {
  --about-particle-size: 6px;
  --about-particle-color: rgba(0, 212, 170, 0.25);
  --about-timeline-line: var(--c-grad-start);
  --about-card-hover: 0 8px 32px rgba(0, 212, 170, 0.15);
  position: relative;
  background: var(--c-dark, #0B1120);
  color: var(--c-text-dark, #E2E8F0);
  overflow-x: hidden;
}

/* ---- 面包屑 ---- */
.page-about__breadcrumb {
  position: absolute;
  top: var(--space-md, 16px);
  left: var(--space-md, 16px);
  z-index: 10;
}
.page-about__breadcrumb .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs, 4px) var(--space-sm, 8px);
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: 0.8rem;
}
.page-about__breadcrumb .breadcrumb__link {
  color: rgba(226, 232, 240, 0.6);
  text-decoration: none;
  transition: color var(--transition, 0.3s);
}
.page-about__breadcrumb .breadcrumb__link:hover {
  color: var(--c-grad-start, #00D4AA);
}
.page-about__breadcrumb .breadcrumb__current {
  color: var(--c-grad-start, #00D4AA);
  font-weight: 600;
}
.page-about__breadcrumb .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: var(--space-xs, 4px);
  color: rgba(226, 232, 240, 0.3);
}

/* ---- 粒子背景 ---- */
.page-about__particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 0;
}
.page-about__particle {
  position: absolute;
  width: var(--about-particle-size);
  height: var(--about-particle-size);
  background: var(--about-particle-color);
  border-radius: 50%;
  left: var(--x, 50%);
  top: var(--y, 50%);
  animation: about-float var(--d, 3s) ease-in-out infinite alternate;
  box-shadow: 0 0 8px rgba(0, 212, 170, 0.15);
}
@keyframes about-float {
  0% { transform: translateY(0) scale(1); opacity: 0.3; }
  100% { transform: translateY(-20px) scale(1.3); opacity: 0.8; }
}

/* ---- Hero 首屏 ---- */
.page-about__hero {
  position: relative;
  z-index: 1;
  padding: var(--space-2xl, 96px) 0 var(--space-xl, 64px);
  min-height: 80vh;
  display: flex;
  align-items: center;
}
.page-about__hero-inner {
  width: 100%;
}
.page-about__hero-frame {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg, 32px);
  border: 1px solid var(--c-border, rgba(192,192,192,0.3));
  border-radius: var(--radius, 8px);
  padding: var(--space-lg, 32px);
  background: rgba(11, 17, 32, 0.6);
  backdrop-filter: blur(4px);
  box-shadow: var(--shadow-lg, 0 8px 32px rgba(0,0,0,0.12));
  overflow: hidden;
}
.page-about__hero-frame .frame-view__label {
  position: absolute;
  top: var(--space-md, 16px);
  right: var(--space-md, 16px);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--c-silver, #C0C0C0);
  opacity: 0.7;
  z-index: 2;
}
.page-about__hero-image-wrap {
  position: relative;
  width: 100%;
  border-radius: calc(var(--radius, 8px) - 4px);
  overflow: hidden;
}
.page-about__hero-img {
  width: 100%;
  height: auto;
  max-height: 400px;
  object-fit: cover;
  display: block;
}
.page-about__hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0, 212, 170, 0.15) 0%, rgba(59, 130, 246, 0.1) 100%);
  pointer-events: none;
}
.page-about__hero-text {
  position: relative;
  z-index: 1;
}
.page-about__hero-heading {
  font-size: 3rem;
  line-height: 1.1;
  margin: 0 0 var(--space-md, 16px);
  font-weight: var(--fw-heading, 800);
  letter-spacing: -0.02em;
}
.page-about__hero-heading .text-gradient {
  background: linear-gradient(135deg, var(--c-grad-start, #00D4AA), var(--c-grad-end, #3B82F6));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.page-about__hero-desc {
  font-size: 1.125rem;
  line-height: 1.7;
  max-width: 640px;
  color: rgba(226, 232, 240, 0.85);
  margin: 0 0 var(--space-lg, 32px);
}
.page-about__hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md, 16px);
}
.page-about__hero-meta {
  position: absolute;
  bottom: var(--space-md, 16px);
  left: var(--space-lg, 32px);
}
.page-about__hero-meta .tag {
  font-size: 0.75rem;
}

/* ---- 章节通用 ---- */
.page-about__section-header {
  display: flex;
  align-items: baseline;
  gap: var(--space-md, 16px);
  margin-bottom: var(--space-lg, 32px);
  flex-wrap: wrap;
}
.page-about__section-number {
  font-size: 1rem;
  color: var(--c-grad-start, #00D4AA);
  opacity: 0.6;
  letter-spacing: 0.1em;
}
.page-about__section-heading {
  font-size: 2rem;
  font-weight: var(--fw-heading, 800);
  margin: 0;
  color: var(--c-text-dark, #E2E8F0);
  letter-spacing: -0.01em;
}
.page-about__section-sep {
  flex: 1;
  min-width: 60px;
  height: 2px;
  background: linear-gradient(90deg, var(--c-grad-start, #00D4AA), transparent);
}

/* ---- 品牌使命 ---- */
.page-about__mission {
  position: relative;
  z-index: 1;
  padding: var(--space-2xl, 96px) 0 var(--space-xl, 64px);
}
.page-about__mission-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl, 64px);
  align-items: center;
}
.page-about__mission-text {
  order: 2;
}
.page-about__mission-paragraph {
  font-size: 1rem;
  line-height: 1.8;
  color: rgba(226, 232, 240, 0.85);
  margin: 0 0 var(--space-md, 16px);
}
.page-about__mission-paragraph .text-accent {
  color: var(--c-accent, #FF6B35);
}
.page-about__mission-stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-lg, 32px);
  margin-top: var(--space-lg, 32px);
}
.page-about__stat {
  text-align: center;
  min-width: 100px;
}
.page-about__stat-value {
  display: block;
  font-size: 2.5rem;
  font-weight: var(--fw-heading, 800);
  color: var(--c-grad-start, #00D4AA);
  line-height: 1.2;
}
.page-about__stat-label {
  display: block;
  font-size: 0.85rem;
  color: rgba(226, 232, 240, 0.6);
  margin-top: var(--space-xs, 4px);
}
.page-about__mission-visual {
  order: 1;
}
.page-about__mission-img {
  width: 100%;
  height: auto;
  border-radius: var(--radius, 8px);
  border: 1px solid var(--c-border, rgba(192,192,192,0.3));
  box-shadow: var(--shadow-md, 0 4px 16px rgba(0,0,0,0.1));
}

/* ---- 核心优势 ---- */
.page-about__advantages {
  position: relative;
  z-index: 1;
  padding: var(--space-xl, 64px) 0 var(--space-2xl, 96px);
}
.page-about__advantages-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg, 32px);
}
.page-about__advantage-card {
  padding: var(--space-lg, 32px);
  background: rgba(11, 17, 32, 0.5);
  border: 1px solid var(--c-border, rgba(192,192,192,0.2));
  border-radius: var(--radius, 8px);
  transition: transform var(--transition, 0.3s), box-shadow var(--transition, 0.3s);
  position: relative;
  overflow: hidden;
}
.page-about__advantage-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--c-grad-start, #00D4AA), var(--c-grad-end, #3B82F6));
  opacity: 0;
  transition: opacity var(--transition, 0.3s);
}
.page-about__advantage-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--about-card-hover);
}
.page-about__advantage-card:hover::before {
  opacity: 1;
}
.page-about__advantage-icon {
  margin-bottom: var(--space-md, 16px);
  display: inline-flex;
}
.page-about__advantage-title {
  font-size: 1.25rem;
  font-weight: var(--fw-heading, 800);
  margin: 0 0 var(--space-sm, 8px);
  color: var(--c-text-dark, #E2E8F0);
}
.page-about__advantage-desc {
  font-size: 0.95rem;
  line-height: 1.7;
  color: rgba(226, 232, 240, 0.75);
  margin: 0 0 var(--space-md, 16px);
}
.page-about__advantage-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs, 4px);
}

/* ---- 时间轴 ---- */
.page-about__timeline {
  position: relative;
  z-index: 1;
  padding: var(--space-2xl, 96px) 0 var(--space-xl, 64px);
}
.page-about__timeline-intro {
  font-size: 1rem;
  line-height: 1.7;
  color: rgba(226, 232, 240, 0.75);
  max-width: 600px;
  margin: 0 0 var(--space-lg, 32px);
}
.page-about__timeline-track {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-lg, 32px);
}
.page-about__timeline-track::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 120px;
  width: 2px;
  background: linear-gradient(180deg, var(--c-grad-start, #00D4AA), var(--c-grad-end, #3B82F6), transparent);
  opacity: 0.4;
}
.page-about__timeline-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: var(--space-lg, 32px);
  position: relative;
}
.page-about__timeline-marker {
  text-align: right;
  padding-top: var(--space-sm, 8px);
}
.page-about__timeline-version {
  display: block;
  font-size: 1rem;
  font-weight: var(--fw-data, 500);
  color: var(--c-grad-start, #00D4AA);
  letter-spacing: 0.03em;
}
.page-about__timeline-stamp {
  display: block;
  font-size: 0.75rem;
  color: rgba(226, 232, 240, 0.45);
  margin-top: var(--space-xs, 4px);
}
.page-about__timeline-content {
  padding: var(--space-md, 16px) var(--space-lg, 32px);
  background: rgba(11, 17, 32, 0.4);
  border: 1px solid var(--c-border, rgba(192,192,192,0.15));
  border-radius: var(--radius, 8px);
  transition: transform var(--transition, 0.3s), box-shadow var(--transition, 0.3s);
}
.page-about__timeline-content:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-md, 0 4px 16px rgba(0,0,0,0.1));
  border-color: rgba(0, 212, 170, 0.3);
}
.page-about__timeline-heading {
  font-size: 1.1rem;
  font-weight: var(--fw-heading, 800);
  margin: 0 0 var(--space-xs, 4px);
  color: var(--c-text-dark, #E2E8F0);
}
.page-about__timeline-desc {
  font-size: 0.9rem;
  line-height: 1.6;
  color: rgba(226, 232, 240, 0.7);
  margin: 0 0 var(--space-sm, 8px);
}
.page-about__timeline-footer {
  margin-top: var(--space-lg, 32px);
  padding-left: 152px;
}
.page-about__inline-link {
  color: var(--c-grad-start, #00D4AA);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition, 0.3s);
}
.page-about__inline-link:hover {
  border-bottom-color: var(--c-grad-start, #00D4AA);
}

/* ---- 信任声明 ---- */
.page-about__trust {
  position: relative;
  z-index: 1;
  padding: var(--space-xl, 64px) 0 var(--space-2xl, 96px);
}
.page-about__trust-box {
  text-align: center;
  padding: var(--space-xl, 64px) var(--space-lg, 32px);
  border: 1px solid var(--c-border, rgba(192,192,192,0.2));
  border-radius: var(--radius, 8px);
  background: linear-gradient(135deg, rgba(0, 212, 170, 0.05), rgba(59, 130, 246, 0.05));
  max-width: 800px;
  margin: 0 auto;
}
.page-about__trust-icon {
  display: inline-flex;
  margin-bottom: var(--space-md, 16px);
}
.page-about__trust-heading {
  font-size: 1.75rem;
  font-weight: var(--fw-heading, 800);
  margin: 0 0 var(--space-md, 16px);
  color: var(--c-text-dark, #E2E8F0);
}
.page-about__trust-desc {
  font-size: 1rem;
  line-height: 1.7;
  color: rgba(226, 232, 240, 0.75);
  max-width: 600px;
  margin: 0 auto var(--space-lg, 32px);
}
.page-about__trust-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-md, 16px);
  margin-bottom: var(--space-lg, 32px);
}
.page-about__trust-version {
  font-size: 0.85rem;
  color: var(--c-grad-start, #00D4AA);
  letter-spacing: 0.05em;
}
.page-about__trust-stamp {
  font-size: 0.85rem;
  color: rgba(226, 232, 240, 0.45);
  letter-spacing: 0.03em;
}
.page-about__trust-cta {
  display: inline-flex;
}

/* ---- 响应式 平板 >=640px ---- */
@media (min-width: 640px) {
  .page-about__hero-heading {
    font-size: 3.75rem;
  }
  .page-about__hero-frame {
    grid-template-columns: 1fr 1fr;
    padding: var(--space-xl, 64px);
  }
  .page-about__hero-image-wrap {
    grid-column: 1 / -1;
  }
  .page-about__hero-text {
    grid-column: 1 / -1;
  }
  .page-about__hero-meta {
    bottom: var(--space-lg, 32px);
    left: var(--space-xl, 64px);
  }
  .page-about__mission-grid {
    grid-template-columns: 1fr 1fr;
  }
  .page-about__mission-text {
    order: 1;
  }
  .page-about__mission-visual {
    order: 2;
  }
  .page-about__advantages-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-about__timeline-track::before {
    left: 160px;
  }
  .page-about__timeline-item {
    grid-template-columns: 160px 1fr;
  }
  .page-about__timeline-footer {
    padding-left: 192px;
  }
}

/* ---- 响应式 桌面 >=1024px ---- */
@media (min-width: 1024px) {
  .page-about__hero-heading {
    font-size: 5rem;
  }
  .page-about__hero-frame {
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }
  .page-about__hero-image-wrap {
    grid-column: 1 / 2;
    grid-row: 1 / 2;
  }
  .page-about__hero-text {
    grid-column: 2 / 3;
    grid-row: 1 / 2;
  }
  .page-about__hero-meta {
    grid-column: 1 / -1;
    position: static;
    margin-top: var(--space-sm, 8px);
  }
  .page-about__advantages-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-about__timeline-track::before {
    left: 200px;
  }
  .page-about__timeline-item {
    grid-template-columns: 200px 1fr;
  }
  .page-about__timeline-footer {
    padding-left: 232px;
  }
  .page-about__section-heading {
    font-size: 2.5rem;
  }
}

/* ---- 超宽屏安全边距 ---- */
@media (min-width: 1400px) {
  .page-about__hero-frame {
    padding: var(--space-2xl, 96px);
  }
}

/* ---- 移动端微调 ---- */
@media (max-width: 400px) {
  .page-about__hero-heading {
    font-size: 2.2rem;
  }
  .page-about__stat-value {
    font-size: 1.8rem;
  }
  .page-about__timeline-item {
    grid-template-columns: 1fr;
    gap: var(--space-sm, 8px);
  }
  .page-about__timeline-marker {
    text-align: left;
    padding-top: 0;
  }
  .page-about__timeline-track::before {
    display: none;
  }
  .page-about__timeline-footer {
    padding-left: 0;
  }
  .page-about__breadcrumb {
    top: var(--space-xs, 4px);
    left: var(--space-xs, 4px);
  }
}
</PAGE_CSS>

.page-about {
  --d: inherit;
  --x: inherit;
  --y: inherit;
}