.page-about {
  --about-gold-glow: rgba(245, 166, 35, 0.25);
  --about-blue-glow: rgba(0, 212, 255, 0.20);
  --about-grid-size: 60px;
  --about-transition-slow: 0.7s cubic-bezier(0.22, 1, 0.36, 1);
  --about-section-gap: clamp(3rem, 8vw, 6rem);
  --about-narrative-min-height: min(100vh, 700px);
  background: var(--clr-bg-dark);
  color: var(--clr-text-primary);
  font-family: var(--font-body);
  line-height: var(--line-height-body);
  overflow-x: hidden;
}
.page-about .breadcrumb {
  padding: 1rem 0 0.5rem;
  font-size: 0.875rem;
  color: var(--clr-text-secondary);
  letter-spacing: 0.02em;
}
.page-about .breadcrumb a {
  color: var(--clr-gold);
  text-decoration: none;
  transition: color var(--transition-base);
}
.page-about .breadcrumb a:hover {
  color: var(--clr-gold-light);
  text-shadow: 0 0 8px var(--about-gold-glow);
}
.page-about .breadcrumb__separator {
  margin: 0 0.5rem;
  opacity: 0.5;
}
.page-about .breadcrumb [aria-current="page"] {
  color: var(--clr-text-secondary);
}

/* ── 品牌叙事：左右分屏 ── */
.page-about__narrative {
  position: relative;
  padding: 2rem 0 var(--about-section-gap);
  min-height: var(--about-narrative-min-height);
  background:
    radial-gradient(ellipse 80% 60% at 10% 30%, rgba(75, 44, 123, 0.30) 0%, transparent 70%),
    radial-gradient(ellipse 60% 50% at 90% 70%, rgba(245, 166, 35, 0.08) 0%, transparent 70%);
}
.page-about__narrative-inner {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
  position: relative;
}
@media (min-width: 1024px) {
  .page-about__narrative-inner {
    flex-direction: row;
    align-items: flex-start;
    gap: 4rem;
    min-height: var(--about-narrative-min-height);
  }
}
.page-about__narrative-text {
  flex: 0 0 auto;
  width: 100%;
  z-index: 2;
}
@media (min-width: 1024px) {
  .page-about__narrative-text {
    width: 48%;
    position: sticky;
    top: calc(var(--header-top-height) + var(--header-main-height) + 1.5rem);
    align-self: flex-start;
    padding-bottom: 3rem;
  }
}
.page-about__narrative-heading {
  font-family: var(--font-heading);
  font-weight: var(--font-weight-heading);
  font-size: clamp(2.2rem, 6vw, 3.6rem);
  line-height: var(--line-height-heading);
  color: var(--clr-text-primary);
  margin: 0 0 0.35em;
  letter-spacing: -0.02em;
  text-shadow: 0 0 30px rgba(245, 166, 35, 0.15);
}
.page-about__narrative-heading::after {
  content: '';
  display: block;
  width: 4rem;
  height: 4px;
  margin-top: 0.6rem;
  background: linear-gradient(90deg, var(--clr-gold), var(--clr-neon-blue));
  border-radius: 4px;
}
.page-about__tagline {
  font-size: clamp(1rem, 2vw, 1.125rem);
  color: var(--clr-gold-light);
  margin: 0 0 1.75rem;
  letter-spacing: 0.06em;
  font-weight: 500;
}
.page-about__story {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.page-about__story-paragraph {
  margin: 0;
  font-size: 1rem;
  color: var(--clr-text-secondary);
  line-height: 1.75;
  max-width: 42em;
}
.page-about__story-paragraph:first-of-type {
  color: var(--clr-text-primary);
  font-size: 1.0625rem;
}

/* ── 右侧视觉 ── */
.page-about__narrative-visual {
  flex: 1 1 100%;
  width: 100%;
  position: relative;
  z-index: 1;
}
@media (min-width: 1024px) {
  .page-about__narrative-visual {
    width: 48%;
    flex: 0 0 48%;
    min-height: 500px;
  }
}
.page-about__visual-wrapper {
  position: relative;
  width: 100%;
  max-width: 600px;
  margin-left: auto;
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow-card), 0 0 40px rgba(245, 166, 35, 0.08);
  background: var(--clr-primary-200);
}
@media (min-width: 1024px) {
  .page-about__visual-wrapper {
    margin-top: 1rem;
  }
}
.page-about__visual-img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  position: relative;
  z-index: 1;
  transition: transform var(--about-transition-slow), filter var(--about-transition-slow);
  will-change: transform;
}
.page-about__visual-wrapper:hover .page-about__visual-img {
  transform: scale(1.03);
  filter: brightness(1.08) saturate(1.1);
}
.page-about__visual-glow {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 50% at 30% 40%, rgba(245, 166, 35, 0.12) 0%, transparent 70%);
  pointer-events: none;
  z-index: 2;
  animation: aboutGlowPulse 4s ease-in-out infinite alternate;
}
@keyframes aboutGlowPulse {
  0% { opacity: 0.5; transform: scale(1); }
  100% { opacity: 1; transform: scale(1.04); }
}
.page-about__visual-grid {
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(0, 212, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.06) 1px, transparent 1px);
  background-size: var(--about-grid-size) var(--about-grid-size);
  opacity: 0.4;
  transition: opacity var(--transition-base);
}
.page-about__visual-wrapper:hover .page-about__visual-grid {
  opacity: 0.7;
}

/* ── 服务范围 ── */
.page-about__scope {
  padding: var(--about-section-gap) 0;
  position: relative;
  background:
    radial-gradient(ellipse 70% 40% at 70% 50%, rgba(0, 212, 255, 0.06) 0%, transparent 70%);
}
.page-about__section-title {
  font-family: var(--font-heading);
  font-weight: var(--font-weight-heading);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  margin: 0 0 0.4em;
  color: var(--clr-text-primary);
  letter-spacing: -0.01em;
}
.page-about__section-subtitle {
  font-size: 1rem;
  color: var(--clr-text-secondary);
  margin: 0 0 2rem;
  max-width: 36em;
}
.page-about__scope-grid {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
  align-items: stretch;
}
@media (min-width: 860px) {
  .page-about__scope-grid {
    flex-direction: row;
    gap: 3rem;
  }
}
.page-about__scope-map {
  flex: 0 0 auto;
  position: relative;
  width: 100%;
  max-width: 500px;
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  background: var(--clr-primary-100);
  transition: box-shadow var(--transition-base);
}
.page-about__scope-map:hover {
  box-shadow: var(--shadow-card), 0 0 30px rgba(0, 212, 255, 0.15);
}
@media (min-width: 860px) {
  .page-about__scope-map {
    width: 50%;
    max-width: 500px;
  }
}
.page-about__map-image {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: contain;
  position: relative;
  z-index: 1;
  transition: transform var(--transition-base), filter var(--transition-base);
  will-change: transform;
}
.page-about__scope-map:hover .page-about__map-image {
  transform: scale(1.02);
  filter: brightness(1.05) drop-shadow(0 0 12px var(--about-blue-glow));
}
.page-about__map-glow {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 40% 40% at 45% 50%, rgba(0, 212, 255, 0.10) 0%, transparent 70%);
  pointer-events: none;
  z-index: 2;
  animation: aboutMapShift 6s ease-in-out infinite alternate;
}
@keyframes aboutMapShift {
  0% { opacity: 0.3; transform: translate(0, 0); }
  100% { opacity: 0.7; transform: translate(4%, 2%); }
}
.page-about__scope-info {
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 1.125rem;
  font-size: 1rem;
  color: var(--clr-text-secondary);
  line-height: 1.7;
}
.page-about__scope-info p {
  margin: 0;
  max-width: 34em;
}
.page-about__scope-note {
  font-size: 0.9375rem;
  color: var(--clr-gold-light);
  padding: 0.75rem 1rem;
  background: rgba(245, 166, 35, 0.08);
  border-left: 3px solid var(--clr-gold);
  border-radius: 0 var(--border-radius) var(--border-radius) 0;
}
.page-about__scope-btn {
  align-self: flex-start;
  margin-top: 0.5rem;
  background: var(--clr-gold);
  color: var(--clr-primary-100);
  font-family: var(--font-heading);
  font-weight: 700;
  padding: 0.75rem 2rem;
  border: none;
  border-radius: var(--border-radius);
  font-size: 0.9375rem;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  transition: background var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
  box-shadow: 0 0 20px rgba(245, 166, 35, 0.20);
}
.page-about__scope-btn:hover {
  background: var(--clr-gold-light);
  box-shadow: 0 0 32px rgba(245, 166, 35, 0.35);
  transform: translateY(-2px);
}

/* ── 核心价值 ── */
.page-about__values {
  padding: var(--about-section-gap) 0 4rem;
  position: relative;
  background:
    radial-gradient(ellipse 60% 50% at 20% 80%, rgba(75, 44, 123, 0.18) 0%, transparent 70%),
    radial-gradient(ellipse 50% 40% at 90% 20%, rgba(245, 166, 35, 0.06) 0%, transparent 60%);
}
.page-about__values-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin: 2.5rem 0 2rem;
}
@media (min-width: 640px) {
  .page-about__values-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 1024px) {
  .page-about__values-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 2.5rem;
  }
}
.page-about__value-item {
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-divider);
  border-radius: var(--border-radius);
  padding: 2rem 1.75rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1rem;
  transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.20);
  position: relative;
  overflow: hidden;
}
.page-about__value-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--clr-gold), var(--clr-neon-blue));
  opacity: 0;
  transition: opacity var(--transition-base);
}
.page-about__value-item:hover {
  border-color: rgba(245, 166, 35, 0.30);
  box-shadow: var(--shadow-card), 0 0 24px rgba(245, 166, 35, 0.08);
  transform: translateY(-4px);
}
.page-about__value-item:hover::before {
  opacity: 1;
}
.page-about__value-icon-wrap {
  width: 80px;
  height: 80px;
  flex-shrink: 0;
  border-radius: 50%;
  background: rgba(0, 212, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-base), box-shadow var(--transition-base);
  box-shadow: 0 0 0 rgba(0, 212, 255, 0);
}
.page-about__value-item:hover .page-about__value-icon-wrap {
  background: rgba(0, 212, 255, 0.16);
  box-shadow: 0 0 24px rgba(0, 212, 255, 0.15);
}
.page-about__value-icon {
  display: block;
  width: 80px;
  height: 80px;
  max-width: 100%;
  object-fit: contain;
  transition: transform var(--transition-base);
}
.page-about__value-item:hover .page-about__value-icon {
  transform: scale(1.08);
}
.page-about__value-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--clr-text-primary);
  margin: 0;
  letter-spacing: 0.02em;
}
.page-about__value-desc {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--clr-text-secondary);
  line-height: 1.65;
}
.page-about__values-footer {
  margin-top: 2.5rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--clr-divider);
  text-align: center;
  font-size: 1rem;
  color: var(--clr-text-secondary);
}
.page-about__values-footer a {
  color: var(--clr-neon-blue);
  text-decoration: none;
  transition: color var(--transition-base), text-shadow var(--transition-base);
}
.page-about__values-footer a:hover {
  color: var(--clr-gold-light);
  text-shadow: 0 0 12px var(--about-gold-glow);
}

/* ── 响应式微调 ── */
@media (max-width: 639px) {
  .page-about__narrative {
    padding-top: 1rem;
  }
  .page-about__narrative-heading {
    font-size: 2rem;
  }
  .page-about__story-paragraph {
    font-size: 0.9375rem;
  }
  .page-about__scope {
    padding: 2.5rem 0;
  }
  .page-about__scope-grid {
    gap: 1.5rem;
  }
  .page-about__scope-info {
    font-size: 0.9375rem;
  }
  .page-about__scope-btn {
    width: 100%;
    text-align: center;
  }
  .page-about__values-grid {
    gap: 1.25rem;
  }
  .page-about__value-item {
    padding: 1.5rem 1.25rem;
  }
  .page-about__value-icon-wrap {
    width: 64px;
    height: 64px;
  }
  .page-about__value-icon {
    width: 64px;
    height: 64px;
  }
  .page-about__values-footer {
    font-size: 0.9375rem;
    padding-top: 1.25rem;
  }
}
@media (min-width: 640px) and (max-width: 1023px) {
  .page-about__narrative-visual {
    max-width: 500px;
    margin: 0 auto;
  }
  .page-about__scope-map {
    max-width: 400px;
  }
}
@media (min-width: 1024px) {
  .page-about__narrative {
    padding-bottom: var(--about-section-gap);
  }
  .page-about__scope-grid {
    align-items: center;
  }
  .page-about__values-grid {
    margin-top: 3rem;
  }
}
@media (prefers-reduced-motion: reduce) {
  .page-about__visual-glow,
  .page-about__visual-img,
  .page-about__map-glow,
  .page-about__value-item,
  .page-about__value-icon,
  .page-about__value-icon-wrap {
    animation: none !important;
    transition: none !important;
    transform: none !important;
  }
}