.page-about {
  display: block;
  --about-frame-glow: 0 0 40px rgba(0, 245, 255, 0.15);
  --about-card-radius: 12px;
  --about-icon-size: 48px;
}

/* ===== 首屏框景 ===== */
.page-about .about-hero {
  position: relative;
  margin: 0;
  padding: 0;
}

.page-about .hero-frame {
  position: relative;
  overflow: hidden;
  border: var(--border-thick, 3px) solid var(--color-border, #2A4A7F);
  box-shadow: var(--about-frame-glow), var(--shadow-soft, 0 8px 32px rgba(0,0,0,0.3));
  background-color: var(--color-primary, #0B1D3A);
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.page-about .hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.4;
  pointer-events: none;
}

.page-about .hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(11,29,58,0.85) 0%, rgba(11,29,58,0.4) 50%, rgba(11,29,58,0.85) 100%);
  pointer-events: none;
  z-index: 1;
}

.page-about .hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 3rem 1.5rem;
  width: 100%;
}

.page-about .breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 2rem;
  font-family: Inter, "SF Pro Display", sans-serif;
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--color-text-secondary, #B0BEC5);
  letter-spacing: 0.05em;
}

.page-about .breadcrumb a {
  color: var(--color-text-secondary, #B0BEC5);
  text-decoration: none;
  transition: color var(--transition-fast, 0.2s ease);
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--color-accent, #00F5FF);
  outline: none;
}

.page-about .breadcrumb-sep {
  color: var(--color-border, #2A4A7F);
  font-size: 0.75rem;
}

.page-about .hero-title {
  margin: 0 0 0.75rem;
  font-family: Inter, "SF Pro Display", sans-serif;
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-text-primary, #FFFFFF);
  text-shadow: 0 0 60px rgba(0,245,255,0.2);
}

.page-about .hero-tagline {
  margin: 0 0 2.5rem;
  font-family: "Noto Sans SC", sans-serif;
  font-size: clamp(1.1rem, 2.5vw, 1.5rem);
  font-weight: 300;
  letter-spacing: 0.15em;
  color: var(--color-accent, #00F5FF);
  opacity: 0.9;
}

.page-about .hero-icons {
  display: flex;
  justify-content: center;
  gap: 2.5rem;
  flex-wrap: wrap;
}

.page-about .hero-icon-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  transition: transform var(--transition-normal, 0.3s ease);
}

.page-about .hero-icon-item:hover {
  transform: translateY(-4px);
}

.page-about .hero-icon-shape {
  width: var(--about-icon-size);
  height: var(--about-icon-size);
  border: 2px solid var(--color-border, #2A4A7F);
  border-radius: 50%;
  background: var(--color-surface-glass, rgba(11,29,58,0.7));
  transition: border-color var(--transition-fast, 0.2s ease), box-shadow var(--transition-fast, 0.2s ease);
}

.page-about .hero-icon-item:hover .hero-icon-shape {
  border-color: var(--color-accent, #00F5FF);
  box-shadow: 0 0 20px rgba(0,245,255,0.3);
}

.page-about .hero-icon-item:focus-within .hero-icon-shape {
  border-color: var(--color-focus, #00F5FF);
  box-shadow: 0 0 0 3px var(--color-focus, #00F5FF);
}

.page-about .icon-classify {
  background: radial-gradient(circle at 40% 40%, rgba(0,245,255,0.2), transparent 70%);
}

.page-about .icon-relogin {
  background: radial-gradient(circle at 60% 40%, rgba(0,245,255,0.2), transparent 70%);
}

.page-about .icon-member {
  background: radial-gradient(circle at 50% 30%, rgba(0,245,255,0.2), transparent 70%);
}

.page-about .hero-icon-label {
  font-family: Inter, "SF Pro Display", sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-secondary, #B0BEC5);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.page-about .hero-corner {
  position: absolute;
  width: 48px;
  height: 48px;
  border-color: var(--color-accent, #00F5FF);
  border-style: solid;
  border-width: 0;
  opacity: 0.5;
  pointer-events: none;
  z-index: 2;
}

.page-about .top-left {
  top: 12px;
  left: 12px;
  border-top-width: 2px;
  border-left-width: 2px;
}

.page-about .top-right {
  top: 12px;
  right: 12px;
  border-top-width: 2px;
  border-right-width: 2px;
}

.page-about .bottom-left {
  bottom: 12px;
  left: 12px;
  border-bottom-width: 2px;
  border-left-width: 2px;
}

.page-about .bottom-right {
  bottom: 12px;
  right: 12px;
  border-bottom-width: 2px;
  border-right-width: 2px;
}

/* ===== 通用章节标题 ===== */
.page-about .section-label {
  margin: 0 0 2rem;
  font-family: Inter, "SF Pro Display", sans-serif;
  font-size: clamp(1.5rem, 3.5vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-text-primary, #FFFFFF);
  position: relative;
  display: inline-block;
}

.page-about .section-label::after {
  content: "";
  display: block;
  width: 60%;
  height: 3px;
  background: var(--color-accent, #00F5FF);
  margin-top: 0.5rem;
  border-radius: 2px;
}

/* ===== 品牌使命 ===== */
.page-about .about-mission {
  padding: 5rem 0;
  background: var(--color-primary, #0B1D3A);
  border-bottom: 1px solid var(--color-border, #2A4A7F);
}

.page-about .mission-inner {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.page-about .mission-body {
  display: flex;
  align-items: flex-start;
  gap: 2.5rem;
  flex-wrap: wrap;
}

.page-about .mission-text {
  flex: 1;
  min-width: 260px;
  margin: 0;
  font-family: "Noto Sans SC", sans-serif;
  font-size: 1.125rem;
  font-weight: 300;
  line-height: 1.8;
  color: var(--color-text-secondary, #B0BEC5);
  max-width: 720px;
}

.page-about .mission-emblem {
  flex-shrink: 0;
  opacity: 0.7;
  transition: opacity var(--transition-normal, 0.3s ease), transform var(--transition-normal, 0.3s ease);
}

.page-about .mission-emblem:hover {
  opacity: 1;
  transform: scale(1.05);
}

/* ===== 核心服务 ===== */
.page-about .about-services {
  padding: 5rem 0;
  background: var(--color-surface-light, #1A2D4A);
  border-bottom: 1px solid var(--color-border, #2A4A7F);
}

.page-about .services-layout {
  display: flex;
  flex-direction: column;
  gap: 3rem;
  align-items: flex-start;
}

.page-about .services-cards {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  width: 100%;
}

.page-about .service-card {
  background: var(--color-surface-glass, rgba(11,29,58,0.7));
  border: 1px solid var(--color-border, #2A4A7F);
  border-radius: var(--about-card-radius);
  padding: 1.5rem;
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  transition: border-color var(--transition-fast, 0.2s ease), box-shadow var(--transition-fast, 0.2s ease), transform var(--transition-fast, 0.2s ease);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.page-about .service-card:hover {
  border-color: var(--color-accent, #00F5FF);
  box-shadow: 0 0 24px rgba(0,245,255,0.12);
  transform: translateX(4px);
}

.page-about .service-card:focus-within {
  border-color: var(--color-focus, #00F5FF);
  box-shadow: 0 0 0 2px var(--color-focus, #00F5FF);
}

.page-about .service-card-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-fast, 0.2s ease);
}

.page-about .service-card:hover .service-card-icon {
  transform: scale(1.1);
}

.page-about .service-card-title {
  margin: 0 0 0.4rem;
  font-family: Inter, "SF Pro Display", sans-serif;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text-primary, #FFFFFF);
  letter-spacing: -0.01em;
}

.page-about .service-card-desc {
  margin: 0;
  font-family: "Noto Sans SC", sans-serif;
  font-size: 0.95rem;
  font-weight: 300;
  line-height: 1.7;
  color: var(--color-text-secondary, #B0BEC5);
}

.page-about .services-figure {
  margin: 0;
  width: 100%;
  max-width: 800px;
  border: 1px solid var(--color-border, #2A4A7F);
  border-radius: var(--about-card-radius);
  overflow: hidden;
  transition: border-color var(--transition-fast, 0.2s ease), box-shadow var(--transition-fast, 0.2s ease);
}

.page-about .services-figure:hover {
  border-color: var(--color-accent, #00F5FF);
  box-shadow: 0 0 28px rgba(0,245,255,0.1);
}

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

.page-about .services-caption {
  padding: 0.75rem 1rem;
  font-family: "Noto Sans SC", sans-serif;
  font-size: 0.8rem;
  font-weight: 300;
  color: var(--color-text-secondary, #B0BEC5);
  background: var(--color-primary, #0B1D3A);
  text-align: center;
  letter-spacing: 0.05em;
}

/* ===== 价值观 ===== */
.page-about .about-values {
  padding: 5rem 0;
  background: var(--color-primary, #0B1D3A);
  border-bottom: 1px solid var(--color-border, #2A4A7F);
}

.page-about .values-layout {
  display: flex;
  flex-direction: column;
  gap: 3rem;
  align-items: flex-start;
}

.page-about .values-list {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  width: 100%;
}

.page-about .value-item {
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  padding: 1.5rem;
  border-left: 3px solid var(--color-border, #2A4A7F);
  transition: border-color var(--transition-fast, 0.2s ease), background var(--transition-fast, 0.2s ease);
}

.page-about .value-item:hover {
  border-left-color: var(--color-accent, #00F5FF);
  background: var(--color-surface-glass, rgba(11,29,58,0.7));
}

.page-about .value-num {
  flex-shrink: 0;
  font-family: Inter, "SF Pro Display", sans-serif;
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--color-accent, #00F5FF);
  opacity: 0.6;
  line-height: 1;
  width: 3rem;
  transition: opacity var(--transition-fast, 0.2s ease);
}

.page-about .value-item:hover .value-num {
  opacity: 1;
}

.page-about .value-content {
  flex: 1;
}

.page-about .value-heading {
  margin: 0 0 0.4rem;
  font-family: Inter, "SF Pro Display", sans-serif;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text-primary, #FFFFFF);
  letter-spacing: -0.01em;
}

.page-about .value-desc {
  margin: 0;
  font-family: "Noto Sans SC", sans-serif;
  font-size: 0.95rem;
  font-weight: 300;
  line-height: 1.7;
  color: var(--color-text-secondary, #B0BEC5);
}

.page-about .values-figure {
  margin: 0;
  width: 100%;
  max-width: 400px;
  border: 1px solid var(--color-border, #2A4A7F);
  border-radius: var(--about-card-radius);
  overflow: hidden;
  transition: border-color var(--transition-fast, 0.2s ease), box-shadow var(--transition-fast, 0.2s ease);
}

.page-about .values-figure:hover {
  border-color: var(--color-accent, #00F5FF);
  box-shadow: 0 0 28px rgba(0,245,255,0.1);
}

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

.page-about .values-caption {
  padding: 0.75rem 1rem;
  font-family: "Noto Sans SC", sans-serif;
  font-size: 0.8rem;
  font-weight: 300;
  color: var(--color-text-secondary, #B0BEC5);
  background: var(--color-primary, #0B1D3A);
  text-align: center;
  letter-spacing: 0.05em;
}

/* ===== 了解更多链接 ===== */
.page-about .about-links {
  padding: 5rem 0;
  background: var(--color-surface-light, #1A2D4A);
  border-bottom: 1px solid var(--color-border, #2A4A7F);
}

.page-about .links-grid {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.page-about .link-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  background: var(--color-surface-glass, rgba(11,29,58,0.7));
  border: 1px solid var(--color-border, #2A4A7F);
  border-radius: var(--about-card-radius);
  text-decoration: none;
  transition: border-color var(--transition-fast, 0.2s ease), box-shadow var(--transition-fast, 0.2s ease), transform var(--transition-fast, 0.2s ease);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.page-about .link-card:hover {
  border-color: var(--color-accent, #00F5FF);
  box-shadow: 0 0 24px rgba(0,245,255,0.12);
  transform: translateX(6px);
}

.page-about .link-card:focus-visible {
  outline: 2px solid var(--color-focus, #00F5FF);
  outline-offset: 2px;
  border-color: var(--color-focus, #00F5FF);
}

.page-about .link-card-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-fast, 0.2s ease);
}

.page-about .link-card:hover .link-card-icon {
  transform: scale(1.1);
}

.page-about .link-card-label {
  flex: 1;
  font-family: Inter, "SF Pro Display", sans-serif;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-text-primary, #FFFFFF);
  letter-spacing: 0.02em;
}

.page-about .link-card-arrow {
  flex-shrink: 0;
  font-size: 1.25rem;
  color: var(--color-accent, #00F5FF);
  transition: transform var(--transition-fast, 0.2s ease);
}

.page-about .link-card:hover .link-card-arrow {
  transform: translateX(4px);
}

/* ===== 信任栏 ===== */
.page-about .about-trust {
  padding: 2rem 0;
  background: var(--color-primary, #0B1D3A);
}

.page-about .trust-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.75rem 1.25rem;
  font-family: "Noto Sans SC", sans-serif;
  font-size: 0.8rem;
  font-weight: 300;
  color: var(--color-text-secondary, #B0BEC5);
}

.page-about .trust-sep {
  color: var(--color-border, #2A4A7F);
  font-size: 0.7rem;
}

.page-about .trust-item {
  white-space: nowrap;
}

/* ===== 响应式 ===== */
@media (min-width: 768px) {
  .page-about .hero-frame {
    min-height: 75vh;
  }

  .page-about .hero-content {
    padding: 4rem 2rem;
  }

  .page-about .hero-icons {
    gap: 3.5rem;
  }

  .page-about .about-mission {
    padding: 6rem 0;
  }

  .page-about .mission-body {
    flex-wrap: nowrap;
  }

  .page-about .about-services {
    padding: 6rem 0;
  }

  .page-about .services-layout {
    flex-direction: row;
    align-items: flex-start;
    gap: 3rem;
  }

  .page-about .services-cards {
    flex: 1;
  }

  .page-about .services-figure {
    flex: 0 0 auto;
    width: 45%;
    max-width: 500px;
  }

  .page-about .service-card {
    padding: 1.75rem 2rem;
  }

  .page-about .about-values {
    padding: 6rem 0;
  }

  .page-about .values-layout {
    flex-direction: row;
    align-items: flex-start;
    gap: 3rem;
  }

  .page-about .values-list {
    flex: 1;
  }

  .page-about .values-figure {
    flex: 0 0 auto;
    width: 35%;
    max-width: 360px;
  }

  .page-about .about-links {
    padding: 6rem 0;
  }

  .page-about .links-grid {
    flex-direction: row;
    gap: 1.5rem;
  }

  .page-about .link-card {
    flex: 1;
    flex-direction: column;
    text-align: center;
    padding: 2rem 1.5rem;
  }

  .page-about .link-card:hover {
    transform: translateY(-4px);
  }

  .page-about .link-card:hover .link-card-arrow {
    transform: translateY(2px);
  }

  .page-about .link-card-label {
    margin: 0.5rem 0;
  }

  .page-about .about-trust {
    padding: 2.5rem 0;
  }
}

@media (min-width: 1024px) {
  .page-about .hero-frame {
    min-height: 80vh;
  }

  .page-about .hero-content {
    padding: 5rem 3rem;
  }

  .page-about .mission-text {
    font-size: 1.25rem;
  }

  .page-about .services-cards {
    gap: 2rem;
  }

  .page-about .service-card {
    padding: 2rem 2.5rem;
  }

  .page-about .values-list {
    gap: 2.5rem;
  }

  .page-about .value-item {
    padding: 2rem 2rem 2rem 2.5rem;
  }

  .page-about .links-grid {
    gap: 2rem;
  }
}