.page-about {
  --page-hero-bg: #1B4332;
  --page-hero-text: #FFFFFF;
  --page-card-shadow: 0 4px 24px rgba(0,0,0,0.10);
  --page-card-radius: 20px;
  --page-gauge-bg: #1B3A2D;
  --page-gauge-border: #2D6A4F;
  --page-panel-bg: #1B4332;
  --page-panel-border: #FF6B35;
  --page-stat-color: #FF8C42;
  --page-story-bg: #F5E6CA;
  --page-platform-bg: #E6D3B3;
  --page-transition: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ── 首屏 ── */
.about-hero {
  position: relative;
  background: var(--page-hero-bg);
  overflow: hidden;
  min-height: 60vh;
  display: flex;
  align-items: stretch;
}

.about-hero__inner {
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: var(--max-width, 1200px);
  margin: 0 auto;
  padding: 2rem 1rem;
  gap: 1.5rem;
  position: relative;
  z-index: 2;
}

.about-hero__text {
  flex: 1 1 50%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.75rem;
}

.about-hero__tag {
  align-self: flex-start;
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  padding: 0.3rem 1rem;
}

.about-hero__title {
  font-family: var(--font-heading, 'Segoe UI', sans-serif);
  font-size: 3rem;
  font-weight: 700;
  color: var(--page-hero-text);
  line-height: 1.1;
  margin: 0;
  letter-spacing: -0.02em;
}

.about-hero__subtitle {
  font-family: var(--font-body, 'Segoe UI', sans-serif);
  font-size: 1.25rem;
  color: rgba(255,255,255,0.85);
  margin: 0;
  font-weight: 400;
}

.about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1rem;
  font-size: 0.95rem;
  color: rgba(255,255,255,0.7);
  margin-top: 0.5rem;
}

.about-hero__sep {
  color: rgba(255,255,255,0.3);
}

.about-hero__visual {
  flex: 1 1 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 200px;
}

.about-hero__img {
  width: 100%;
  height: auto;
  max-height: 320px;
  object-fit: cover;
  border-radius: var(--radius-lg, 20px);
  opacity: 0.85;
  mix-blend-mode: screen;
}

.about-hero__wave {
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 100%;
  height: 80px;
  z-index: 2;
  pointer-events: none;
  line-height: 0;
}

.about-hero__wave svg {
  display: block;
  width: 100%;
  height: 100%;
}

/* ── 面包屑 ── */
.about-breadcrumb {
  background: var(--color-bg, #F5E6CA);
  padding: 0.75rem 1rem;
  max-width: var(--max-width, 1200px);
  margin: 0 auto;
  width: 100%;
  box-sizing: border-box;
}

.about-breadcrumb__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 0.5rem;
  font-size: 0.875rem;
  font-family: var(--font-body, 'Segoe UI', sans-serif);
}

.about-breadcrumb__list li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.about-breadcrumb__list li + li::before {
  content: "/";
  color: var(--color-text-secondary, #6C757D);
}

.about-breadcrumb__list a {
  color: var(--color-primary, #1B4332);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.about-breadcrumb__list a:hover {
  color: var(--color-accent, #FF6B35);
}

.about-breadcrumb__list span[aria-current="page"] {
  color: var(--color-text-secondary, #6C757D);
  font-weight: 500;
}

/* ── 品牌故事 ── */
.about-story {
  background: var(--page-story-bg);
  padding: 2.5rem 1rem 3rem;
}

.about-story__intro {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  margin-bottom: 2.5rem;
}

.about-story__content {
  flex: 1 1 55%;
}

.about-story__text {
  font-family: var(--font-body, 'Segoe UI', sans-serif);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text, #2D2D2D);
  margin: 1.25rem 0 1.5rem;
}

.about-story__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.about-story__figure {
  flex: 1 1 40%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-story__img {
  width: 100%;
  max-width: 400px;
  height: auto;
  border-radius: var(--page-card-radius);
  box-shadow: var(--page-card-shadow);
}

/* ── 双卡片 ── */
.about-cards {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-top: 1rem;
}

.about-card {
  flex: 1 1 50%;
}

.about-card__inner {
  background: var(--color-white, #FFFFFF);
  border-radius: var(--page-card-radius);
  padding: 1.75rem 1.5rem;
  box-shadow: var(--page-card-shadow);
  height: 100%;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: transform var(--transition, 0.3s), box-shadow var(--transition, 0.3s);
}

.about-card--gauge .about-card__inner {
  background: var(--page-gauge-bg);
  border: 2px solid var(--page-gauge-border);
  color: var(--color-white, #FFFFFF);
}

.about-card--info .about-card__inner {
  border: 2px solid var(--color-bg-dark, #E6D3B3);
}

.about-card__title {
  font-family: var(--font-heading, 'Segoe UI', sans-serif);
  font-size: 1.35rem;
  font-weight: 700;
  margin: 0;
  color: inherit;
}

.about-card--info .about-card__title {
  color: var(--color-primary, #1B4332);
}

.about-card__desc {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.6);
  margin: 0;
}

.about-card__stats {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  font-size: 0.85rem;
  color: var(--color-data-orange, #FF8C42);
  opacity: 0;
  transform: translateY(6px);
  transition: opacity var(--transition, 0.3s), transform var(--transition, 0.3s);
}

.about-card--gauge:hover .about-card__stats {
  opacity: 1;
  transform: translateY(0);
}

.about-card__stat {
  background: rgba(255,255,255,0.08);
  padding: 0.2rem 0.8rem;
  border-radius: var(--radius-full, 9999px);
  font-weight: 500;
}

.about-card__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  flex: 1;
}

.about-card__item {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--color-text, #2D2D2D);
}

.about-card__icon {
  color: var(--color-accent, #FF6B35);
  font-size: 0.7rem;
  margin-top: 0.35rem;
  flex-shrink: 0;
}

.about-card__list strong {
  color: var(--color-primary, #1B4332);
}

.about-card .btn {
  align-self: flex-start;
  margin-top: 0.5rem;
}

/* ── 仪表盘 SVG ── */
.about-gauge {
  width: 100%;
  max-width: 220px;
  margin: 0 auto;
}

.about-gauge__svg {
  display: block;
  width: 100%;
  height: auto;
}

.about-gauge__needle {
  transform-origin: 110px 120px;
  transition: transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.about-card--gauge:hover .about-gauge__needle {
  transform: rotate(38deg);
}

/* ── 数据能力展示 ── */
.about-capabilities {
  background: var(--page-panel-bg);
  padding: 3rem 1rem;
  color: var(--color-white, #FFFFFF);
}

.about-capabilities__lead {
  font-family: var(--font-body, 'Segoe UI', sans-serif);
  font-size: 1rem;
  color: rgba(255,255,255,0.7);
  margin: -0.5rem 0 2rem;
  text-align: center;
}

.about-capabilities__grid {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.about-capability {
  flex: 1 1 33.333%;
}

.about-capability__panel {
  background: rgba(255,255,255,0.06);
  border: 2px solid var(--page-panel-border);
  border-radius: var(--page-card-radius);
  padding: 1.75rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  height: 100%;
  transition: background var(--transition, 0.3s);
}

.about-capability__panel:hover {
  background: rgba(255,255,255,0.10);
}

.about-capability__icon {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
}

.about-capability__icon svg {
  display: block;
}

.about-capability__title {
  font-family: var(--font-heading, 'Segoe UI', sans-serif);
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0;
  color: var(--color-white, #FFFFFF);
}

.about-capability__desc {
  font-size: 0.9rem;
  line-height: 1.6;
  color: rgba(255,255,255,0.75);
  margin: 0;
  flex: 1;
}

.about-capability__stat {
  display: flex;
  align-items: baseline;
  gap: 0.3rem;
  margin-top: 0.5rem;
}

.about-capability__unit {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.5);
}

.about-capabilities__cta {
  text-align: center;
  margin-top: 2.5rem;
}

/* ── 平台特点 ── */
.about-platform {
  background: var(--page-platform-bg);
  padding: 2.5rem 1rem 3rem;
}

.about-platform__grid {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.about-platform__text {
  flex: 1 1 55%;
}

.about-platform__list {
  list-style: none;
  margin: 1.25rem 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.about-platform__item {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--color-text, #2D2D2D);
}

.about-platform__mark {
  color: var(--color-accent, #FF6B35);
  font-size: 0.8rem;
  flex-shrink: 0;
  margin-top: 0.25rem;
}

.about-platform__item strong {
  color: var(--color-primary, #1B4332);
}

.about-platform__visual {
  flex: 1 1 40%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-platform__img {
  width: 100%;
  max-width: 400px;
  height: auto;
  border-radius: var(--page-card-radius);
  box-shadow: var(--page-card-shadow);
}

/* ── 共享类覆盖 / 工具 ── */
.page-about .container {
  max-width: var(--max-width, 1200px);
  margin: 0 auto;
  width: 100%;
  box-sizing: border-box;
  padding: 0;
}

.page-about .section-title {
  font-family: var(--font-heading, 'Segoe UI', sans-serif);
  font-size: 1.75rem;
  font-weight: 700;
  margin: 0 0 0.5rem;
  padding-left: 1rem;
  border-left: 5px solid var(--color-accent, #FF6B35);
  color: var(--color-text, #2D2D2D);
}

.page-about .section-title.light {
  color: var(--color-white, #FFFFFF);
  border-left-color: var(--color-accent, #FF6B35);
  text-align: left;
}

.page-about .btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-body, 'Segoe UI', sans-serif);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.6rem 1.4rem;
  border-radius: var(--radius-full, 9999px);
  text-decoration: none;
  transition: background var(--transition, 0.3s), transform var(--transition, 0.3s), box-shadow var(--transition, 0.3s);
  border: none;
  cursor: default;
}

.page-about .btn-primary {
  background: var(--color-primary, #1B4332);
  color: var(--color-white, #FFFFFF);
}

.page-about .btn-primary:hover {
  background: var(--color-primary-light, #2D6A4F);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(27,67,50,0.3);
}

.page-about .btn-accent {
  background: var(--color-accent, #FF6B35);
  color: var(--color-white, #FFFFFF);
}

.page-about .btn-accent:hover {
  background: var(--color-accent-dark, #E55A2B);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(255,107,53,0.35);
}

.page-about .stat-value {
  font-family: var(--font-heading, 'Segoe UI', sans-serif);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--page-stat-color);
  line-height: 1;
}

.page-about .capsule-tag {
  display: inline-block;
  font-family: var(--font-body, 'Segoe UI', sans-serif);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.9rem;
  border-radius: var(--radius-full, 9999px);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.page-about .capsule-tag.data-orange {
  background: var(--color-accent, #FF6B35);
  color: var(--color-white, #FFFFFF);
}

/* ── 响应式 ── */
@media (min-width: 768px) {
  .about-hero {
    min-height: 65vh;
  }

  .about-hero__inner {
    flex-direction: row;
    padding: 3rem 2rem;
    gap: 2rem;
  }

  .about-hero__title {
    font-size: 4.5rem;
  }

  .about-hero__subtitle {
    font-size: 1.5rem;
  }

  .about-hero__meta {
    font-size: 1rem;
  }

  .about-hero__img {
    max-height: 400px;
  }

  .about-breadcrumb {
    padding: 0.75rem 2rem;
  }

  .about-story {
    padding: 3.5rem 2rem 4rem;
  }

  .about-story__intro {
    flex-direction: row;
    align-items: center;
  }

  .about-cards {
    flex-direction: row;
    gap: 2rem;
  }

  .about-card__inner {
    padding: 2rem;
  }

  .about-capabilities {
    padding: 4rem 2rem;
  }

  .about-capabilities__grid {
    flex-direction: row;
    gap: 2rem;
  }

  .about-capabilities__lead {
    font-size: 1.1rem;
  }

  .about-platform {
    padding: 3.5rem 2rem 4rem;
  }

  .about-platform__grid {
    flex-direction: row;
    align-items: center;
  }

  .page-about .section-title {
    font-size: 2rem;
  }
}

@media (min-width: 1024px) {
  .about-hero__title {
    font-size: 5.5rem;
  }

  .about-hero__inner {
    padding: 4rem 2rem;
  }

  .about-hero__img {
    max-height: 480px;
  }
}