.page-about {
  --page-bg: var(--color-bg-warm, #FBF8F2);
  --page-cover-bg: var(--color-primary, #1B5E20);
  --page-cover-text: var(--color-neutral-white, #FFFFFF);
  --page-gold: var(--color-accent-gold, #C5A55A);
  --page-green-light: var(--color-primary-light, #388E3C);
  --page-orange: var(--color-cta-orange, #FF6F00);
  --page-text-dark: var(--color-text-dark, #1A1A1A);
  --page-text-muted: var(--color-text-muted, #666666);
  --page-radius: var(--radius-large, 16px);
  --page-pill: var(--radius-pill, 999px);
  --page-trans: var(--transition-default, 0.3s cubic-bezier(0.4,0,0.2,1));

  display: block;
  background: var(--page-bg);
  font-family: var(--font-body, "Inter","Helvetica Neue",Arial,"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif);
  color: var(--page-text-dark);
  line-height: var(--line-height-body, 1.7);
}

/* ---------- 封面区 ---------- */
.page-about .about-cover {
  background: var(--page-cover-bg);
  color: var(--page-cover-text);
  padding: 3rem 0 4rem;
  position: relative;
  overflow: hidden;
}
.page-about .about-cover::after {
  content: "";
  position: absolute;
  top: 0; right: 0;
  width: 45%; height: 100%;
  background: linear-gradient(135deg, transparent 30%, rgba(197,165,90,0.12) 100%);
  pointer-events: none;
}
.page-about .about-cover-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 2rem;
  position: relative;
  z-index: 1;
}
.page-about .about-cover-text {
  flex: 1 1 320px;
  min-width: 0;
}
.page-about .overhead-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--page-gold);
  background: rgba(197,165,90,0.15);
  padding: 0.2rem 0.8rem;
  border-radius: var(--page-pill);
  margin-bottom: 1rem;
}
.page-about .about-cover-heading {
  font-family: var(--font-heading, "Inter","Helvetica Neue",Arial,"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif);
  font-weight: var(--heading-weight, 800);
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: var(--line-height-heading, 1.1);
  font-style: italic;
  transform: skewX(-2deg);
  margin: 0 0 1.2rem;
  color: var(--page-cover-text);
}
.page-about .about-cover-sub {
  font-size: 1.05rem;
  max-width: 540px;
  margin: 0 0 1.5rem;
  opacity: 0.88;
  line-height: 1.7;
}
.page-about .about-cover-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}
.page-about .tag-pill {
  display: inline-block;
  background: rgba(255,255,255,0.10);
  border: 1px solid rgba(255,255,255,0.20);
  color: var(--page-cover-text);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.3rem 1rem;
  border-radius: var(--page-pill);
  letter-spacing: 0.02em;
  transition: background var(--page-trans);
}
.page-about .tag-pill:hover {
  background: rgba(255,255,255,0.18);
}
.page-about .about-cover-visual {
  flex: 0 0 320px;
  max-width: 100%;
}
.page-about .cover-diagram {
  display: block;
  width: 100%;
  height: auto;
  max-width: 600px;
  border-radius: var(--page-radius);
  object-fit: contain;
  background: rgba(255,255,255,0.04);
}

/* ---------- 服务图谱 ---------- */
.page-about .service-tree-section {
  padding: 4rem 0 3rem;
  background: var(--page-bg);
}
.page-about .service-tree-header {
  text-align: center;
  margin-bottom: 3rem;
}
.page-about .section-title {
  font-family: var(--font-heading);
  font-weight: var(--heading-weight, 800);
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  line-height: var(--line-height-heading, 1.1);
  font-style: italic;
  transform: skewX(-2deg);
  margin: 0 0 0.6rem;
  color: var(--page-text-dark);
}
.page-about .section-desc {
  font-size: 1rem;
  color: var(--page-text-muted);
  max-width: 480px;
  margin: 0 auto;
}
.page-about .service-tree-layout {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  align-items: flex-start;
  justify-content: center;
}
.page-about .service-tree-canvas {
  flex: 1 1 360px;
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
  padding: 1rem 0;
}
.page-about .tree-node {
  background: var(--color-neutral-white, #FFFFFF);
  border: 2px solid rgba(27,94,32,0.12);
  border-radius: var(--page-radius);
  padding: 1.2rem 1.5rem;
  width: 100%;
  max-width: 320px;
  text-align: center;
  transition: transform var(--page-trans), box-shadow var(--page-trans);
  cursor: default;
  position: relative;
}
.page-about .tree-node:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(27,94,32,0.08);
  border-color: var(--page-gold);
}
.page-about .tree-node-icon {
  margin-bottom: 0.6rem;
  display: flex;
  justify-content: center;
}
.page-about .tree-node-icon svg {
  width: 40px;
  height: 40px;
}
.page-about .tree-node-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.05rem;
  margin: 0 0 0.3rem;
  color: var(--page-text-dark);
}
.page-about .tree-node-desc {
  font-size: 0.875rem;
  color: var(--page-text-muted);
  margin: 0;
  line-height: 1.5;
}
.page-about .tree-connector {
  width: 100%;
  max-width: 120px;
  height: 36px;
  display: flex;
  justify-content: center;
  align-items: center;
}
.page-about .tree-connector svg,
.page-about .tree-connector-down svg {
  display: block;
  width: 100%;
  height: 100%;
}
.page-about .tree-connector-down {
  width: 40px;
  height: 60px;
  display: flex;
  justify-content: center;
  align-items: center;
}
.page-about .service-tree-visual {
  flex: 0 0 320px;
  max-width: 100%;
}
.page-about .tree-illustration {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--page-radius);
  object-fit: cover;
  background: var(--color-neutral-white-soft, #F5F5F0);
}

/* ---------- 数据来源声明 ---------- */
.page-about .data-source-section {
  padding: 3.5rem 0;
  background: var(--color-neutral-white, #FFFFFF);
  position: relative;
  overflow: hidden;
}
.page-about .data-source-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 2rem;
  position: relative;
  z-index: 1;
}
.page-about .data-source-content {
  flex: 1 1 360px;
  min-width: 0;
}
.page-about .data-source-text {
  font-size: 1rem;
  color: var(--page-text-dark);
  max-width: 600px;
  margin: 0 0 1.5rem;
  line-height: 1.8;
}
.page-about .data-source-seal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.9rem;
  color: var(--page-text-muted);
}
.page-about .seal-badge {
  display: inline-block;
  background: var(--page-cover-bg);
  color: var(--page-cover-text);
  font-weight: 700;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  padding: 0.25rem 0.9rem;
  border-radius: var(--page-pill);
  text-transform: uppercase;
}
.page-about .seal-divider {
  color: var(--page-gold);
  font-weight: 700;
}
.page-about .seal-claim {
  font-style: italic;
  color: var(--page-text-muted);
}
.page-about .data-source-diagonal {
  flex: 0 0 200px;
  height: 180px;
  background: linear-gradient(135deg, var(--page-bg) 25%, transparent 25%),
              linear-gradient(225deg, var(--page-bg) 25%, transparent 25%);
  background-size: 40px 40px;
  opacity: 0.3;
  border-radius: var(--page-radius);
}

/* ---------- CTA ---------- */
.page-about .brand-cta-section {
  padding: 2.5rem 0 3rem;
  background: var(--page-bg);
}
.page-about .cta-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.2rem;
  text-align: center;
}
.page-about .cta-label {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
  margin: 0;
  color: var(--page-text-dark);
}
.page-about .btn-cta {
  display: inline-block;
  background: var(--page-orange);
  color: var(--color-neutral-white, #FFFFFF);
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 1rem;
  padding: 0.75rem 2.2rem;
  border-radius: var(--page-pill);
  text-decoration: none;
  transition: background var(--page-trans), transform var(--page-trans);
  border: none;
  cursor: pointer;
}
.page-about .btn-cta:hover {
  background: #E06500;
  transform: scale(1.03);
}

/* ---------- 信任声明 ---------- */
.page-about .page-about-trust {
  background: var(--page-cover-bg);
  color: rgba(255,255,255,0.70);
  font-size: 0.8rem;
  padding: 0.8rem 0;
  text-align: center;
}
.page-about .trust-inner p {
  margin: 0;
  letter-spacing: 0.02em;
}

/* ---------- 响应式 ---------- */
@media (max-width: 640px) {
  .page-about .about-cover {
    padding: 2rem 0 3rem;
  }
  .page-about .about-cover-inner {
    flex-direction: column;
  }
  .page-about .about-cover-visual {
    flex: 0 0 auto;
    width: 100%;
    max-width: 360px;
    margin: 0 auto;
  }
  .page-about .service-tree-layout {
    flex-direction: column;
    align-items: center;
  }
  .page-about .service-tree-canvas {
    width: 100%;
    max-width: 400px;
  }
  .page-about .service-tree-visual {
    width: 100%;
    max-width: 400px;
  }
  .page-about .data-source-inner {
    flex-direction: column;
  }
  .page-about .data-source-diagonal {
    width: 100%;
    height: 80px;
    flex: 0 0 auto;
  }
  .page-about .tree-connector {
    max-width: 60px;
    height: 24px;
  }
  .page-about .tree-connector-down {
    height: 40px;
  }
}
</style>
</main>

/* 所有选择器限定在 .page-about 作用域内 */
.page-about {
  --page-bg: var(--color-bg-warm, #FBF8F2);
  --page-cover-bg: var(--color-primary, #1B5E20);
  --page-cover-text: var(--color-neutral-white, #FFFFFF);
  --page-gold: var(--color-accent-gold, #C5A55A);
  --page-green-light: var(--color-primary-light, #388E3C);
  --page-orange: var(--color-cta-orange, #FF6F00);
  --page-text-dark: var(--color-text-dark, #1A1A1A);
  --page-text-muted: var(--color-text-muted, #666666);
  --page-radius: var(--radius-large, 16px);
  --page-pill: var(--radius-pill, 999px);
  --page-trans: var(--transition-default, 0.3s cubic-bezier(0.4,0,0.2,1));

  display: block;
  background: var(--page-bg);
  font-family: var(--font-body, "Inter","Helvetica Neue",Arial,"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif);
  color: var(--page-text-dark);
  line-height: var(--line-height-body, 1.7);
}

/* 封面区 */
.page-about .about-cover {
  background: var(--page-cover-bg);
  color: var(--page-cover-text);
  padding: 3rem 0 4rem;
  position: relative;
  overflow: hidden;
}
.page-about .about-cover::after {
  content: "";
  position: absolute;
  top: 0; right: 0;
  width: 45%; height: 100%;
  background: linear-gradient(135deg, transparent 30%, rgba(197,165,90,0.12) 100%);
  pointer-events: none;
}
.page-about .about-cover-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 2rem;
  position: relative;
  z-index: 1;
}
.page-about .about-cover-text {
  flex: 1 1 320px;
  min-width: 0;
}
.page-about .overhead-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--page-gold);
  background: rgba(197,165,90,0.15);
  padding: 0.2rem 0.8rem;
  border-radius: var(--page-pill);
  margin-bottom: 1rem;
}
.page-about .about-cover-heading {
  font-family: var(--font-heading, "Inter","Helvetica Neue",Arial,"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif);
  font-weight: var(--heading-weight, 800);
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: var(--line-height-heading, 1.1);
  font-style: italic;
  transform: skewX(-2deg);
  margin: 0 0 1.2rem;
  color: var(--page-cover-text);
}
.page-about .about-cover-sub {
  font-size: 1.05rem;
  max-width: 540px;
  margin: 0 0 1.5rem;
  opacity: 0.88;
  line-height: 1.7;
}
.page-about .about-cover-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}
.page-about .tag-pill {
  display: inline-block;
  background: rgba(255,255,255,0.10);
  border: 1px solid rgba(255,255,255,0.20);
  color: var(--page-cover-text);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.3rem 1rem;
  border-radius: var(--page-pill);
  letter-spacing: 0.02em;
  transition: background var(--page-trans);
}
.page-about .tag-pill:hover {
  background: rgba(255,255,255,0.18);
}
.page-about .about-cover-visual {
  flex: 0 0 320px;
  max-width: 100%;
}
.page-about .cover-diagram {
  display: block;
  width: 100%;
  height: auto;
  max-width: 600px;
  border-radius: var(--page-radius);
  object-fit: contain;
  background: rgba(255,255,255,0.04);
}

/* 服务图谱 */
.page-about .service-tree-section {
  padding: 4rem 0 3rem;
  background: var(--page-bg);
}
.page-about .service-tree-header {
  text-align: center;
  margin-bottom: 3rem;
}
.page-about .section-title {
  font-family: var(--font-heading);
  font-weight: var(--heading-weight, 800);
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  line-height: var(--line-height-heading, 1.1);
  font-style: italic;
  transform: skewX(-2deg);
  margin: 0 0 0.6rem;
  color: var(--page-text-dark);
}
.page-about .section-desc {
  font-size: 1rem;
  color: var(--page-text-muted);
  max-width: 480px;
  margin: 0 auto;
}
.page-about .service-tree-layout {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  align-items: flex-start;
  justify-content: center;
}
.page-about .service-tree-canvas {
  flex: 1 1 360px;
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
  padding: 1rem 0;
}
.page-about .tree-node {
  background: var(--color-neutral-white, #FFFFFF);
  border: 2px solid rgba(27,94,32,0.12);
  border-radius: var(--page-radius);
  padding: 1.2rem 1.5rem;
  width: 100%;
  max-width: 320px;
  text-align: center;
  transition: transform var(--page-trans), box-shadow var(--page-trans);
  cursor: default;
  position: relative;
}
.page-about .tree-node:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(27,94,32,0.08);
  border-color: var(--page-gold);
}
.page-about .tree-node-icon {
  margin-bottom: 0.6rem;
  display: flex;
  justify-content: center;
}
.page-about .tree-node-icon svg {
  width: 40px;
  height: 40px;
}
.page-about .tree-node-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.05rem;
  margin: 0 0 0.3rem;
  color: var(--page-text-dark);
}
.page-about .tree-node-desc {
  font-size: 0.875rem;
  color: var(--page-text-muted);
  margin: 0;
  line-height: 1.5;
}
.page-about .tree-connector {
  width: 100%;
  max-width: 120px;
  height: 36px;
  display: flex;
  justify-content: center;
  align-items: center;
}
.page-about .tree-connector svg,
.page-about .tree-connector-down svg {
  display: block;
  width: 100%;
  height: 100%;
}
.page-about .tree-connector-down {
  width: 40px;
  height: 60px;
  display: flex;
  justify-content: center;
  align-items: center;
}
.page-about .service-tree-visual {
  flex: 0 0 320px;
  max-width: 100%;
}
.page-about .tree-illustration {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--page-radius);
  object-fit: cover;
  background: var(--color-neutral-white-soft, #F5F5F0);
}

/* 数据来源声明 */
.page-about .data-source-section {
  padding: 3.5rem 0;
  background: var(--color-neutral-white, #FFFFFF);
  position: relative;
  overflow: hidden;
}
.page-about .data-source-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 2rem;
  position: relative;
  z-index: 1;
}
.page-about .data-source-content {
  flex: 1 1 360px;
  min-width: 0;
}
.page-about .data-source-text {
  font-size: 1rem;
  color: var(--page-text-dark);
  max-width: 600px;
  margin: 0 0 1.5rem;
  line-height: 1.8;
}
.page-about .data-source-seal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.9rem;
  color: var(--page-text-muted);
}
.page-about .seal-badge {
  display: inline-block;
  background: var(--page-cover-bg);
  color: var(--page-cover-text);
  font-weight: 700;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  padding: 0.25rem 0.9rem;
  border-radius: var(--page-pill);
  text-transform: uppercase;
}
.page-about .seal-divider {
  color: var(--page-gold);
  font-weight: 700;
}
.page-about .seal-claim {
  font-style: italic;
  color: var(--page-text-muted);
}
.page-about .data-source-diagonal {
  flex: 0 0 200px;
  height: 180px;
  background: linear-gradient(135deg, var(--page-bg) 25%, transparent 25%),
              linear-gradient(225deg, var(--page-bg) 25%, transparent 25%);
  background-size: 40px 40px;
  opacity: 0.3;
  border-radius: var(--page-radius);
}

/* CTA */
.page-about .brand-cta-section {
  padding: 2.5rem 0 3rem;
  background: var(--page-bg);
}
.page-about .cta-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.2rem;
  text-align: center;
}
.page-about .cta-label {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
  margin: 0;
  color: var(--page-text-dark);
}
.page-about .btn-cta {
  display: inline-block;
  background: var(--page-orange);
  color: var(--color-neutral-white, #FFFFFF);
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 1rem;
  padding: 0.75rem 2.2rem;
  border-radius: var(--page-pill);
  text-decoration: none;
  transition: background var(--page-trans), transform var(--page-trans);
  border: none;
  cursor: pointer;
}
.page-about .btn-cta:hover {
  background: #E06500;
  transform: scale(1.03);
}

/* 信任声明 */
.page-about .page-about-trust {
  background: var(--page-cover-bg);
  color: rgba(255,255,255,0.70);
  font-size: 0.8rem;
  padding: 0.8rem 0;
  text-align: center;
}
.page-about .trust-inner p {
  margin: 0;
  letter-spacing: 0.02em;
}

/* 响应式：移动端优先 */
@media (max-width: 640px) {
  .page-about .about-cover {
    padding: 2rem 0 3rem;
  }
  .page-about .about-cover-inner {
    flex-direction: column;
  }
  .page-about .about-cover-visual {
    flex: 0 0 auto;
    width: 100%;
    max-width: 360px;
    margin: 0 auto;
  }
  .page-about .service-tree-layout {
    flex-direction: column;
    align-items: center;
  }
  .page-about .service-tree-canvas {
    width: 100%;
    max-width: 400px;
  }
  .page-about .service-tree-visual {
    width: 100%;
    max-width: 400px;
  }
  .page-about .data-source-inner {
    flex-direction: column;
  }
  .page-about .data-source-diagonal {
    width: 100%;
    height: 80px;
    flex: 0 0 auto;
  }
  .page-about .tree-connector {
    max-width: 60px;
    height: 24px;
  }
  .page-about .tree-connector-down {
    height: 40px;
  }
}