/* ======== 品牌档案页专属样式 ======== */
.page-about {
  --about-space-y: clamp(64px, 8vw, 120px);
  --about-card-radius: 10px;
  overflow-x: hidden;
}

/* ---------- 首屏 Hero ---------- */
.page-about .about-hero {
  background: var(--color-space);
  color: var(--color-white);
  padding: clamp(48px, 6vw, 72px) 0 clamp(56px, 7vw, 88px);
  position: relative;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 56px 56px;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -120px;
  top: -120px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(closest-side, rgba(255, 77, 36, 0.18), transparent 70%);
  pointer-events: none;
}

.page-about .about-hero .container {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .breadcrumb {
  margin-bottom: 48px;
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

.page-about .about-hero-main h1 {
  font-family: var(--font-heading);
  font-size: var(--fs-hero);
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin: 18px 0 22px;
  max-width: 660px;
}

.page-about .about-hero-lead {
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--color-mist);
  max-width: 560px;
  margin: 0;
}

.page-about .about-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 32px;
}

.page-about .about-hero-meta span {
  font-size: var(--fs-label);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-white);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  padding: 8px 16px;
}

/* ---------- 索引导航 ---------- */
.page-about .about-index {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-content: flex-start;
  border-left: 2px solid rgba(255, 77, 36, 0.5);
  padding-left: 18px;
}

.page-about .about-index-kicker {
  width: 100%;
  font-size: var(--fs-label);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: rgba(255, 255, 255, 0.45);
  margin-bottom: 4px;
}

.page-about .about-index-item {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  color: var(--color-mist);
  text-decoration: none;
  font-size: var(--fs-small);
  padding: 10px 12px 10px 0;
  transition: color 0.3s var(--ease-out), padding-left 0.3s var(--ease-out);
}

.page-about .about-index-item span {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--color-flame);
  font-size: 0.875rem;
}

.page-about .about-index-item:hover {
  color: var(--color-white);
  padding-left: 8px;
}

/* ---------- 章节通用网格 ---------- */
.page-about .about-section {
  padding: var(--about-space-y) 0;
}

.page-about .about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-about .about-grid-notes {
  display: flex;
  align-items: flex-start;
}

.page-about .about-section-desc {
  max-width: 540px;
  line-height: 1.7;
  font-size: 1.0625rem;
  margin: 12px 0 0;
  color: var(--color-ink);
}

.page-about .about-paragraph-lead {
  font-family: var(--font-heading);
  font-size: clamp(20px, 2.2vw, 28px);
  line-height: 1.35;
  color: var(--color-space);
  margin: 0 0 32px;
  font-weight: 600;
  max-width: 560px;
}

/* ---------- 品牌使命 ---------- */
.page-about .about-mission {
  background: var(--color-mist);
}

.page-about .about-mission .about-grid-notes .index-note--light,
.page-about .about-tech .about-grid-notes .index-note--light,
.page-about .about-local .about-grid-notes .index-note--light {
  color: var(--color-ink);
}

.page-about .mission-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-bottom: 36px;
}

.page-about .mission-copy p {
  color: var(--color-ink);
  line-height: 1.8;
  margin: 0 0 16px;
  font-size: 0.9375rem;
}

.page-about .mission-visual img,
.page-about .tech-image img,
.page-about .local-image img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  box-shadow: var(--shadow-panel);
  display: block;
  object-fit: cover;
}

.page-about .mission-visual img {
  max-height: 380px;
  object-fit: cover;
}

.page-about .mission-stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

/* ---------- 发展里程碑 ---------- */
.page-about .about-milestones {
  background: var(--color-space);
}

.page-about .about-milestones .about-section-desc,
.page-about .about-ecosystem .about-section-desc {
  color: var(--color-mist);
}

.page-about .milestone-track {
  position: relative;
  padding-left: 32px;
  display: flex;
  flex-direction: column;
}

.page-about .milestone-track::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 16px;
  bottom: 16px;
  width: 2px;
  background: linear-gradient(180deg, var(--color-flame) 0%, var(--color-ember) 48%, rgba(255, 166, 61, 0.18) 100%);
}

.page-about .milestone-item {
  position: relative;
  padding: 24px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.page-about .milestone-item:last-child {
  border-bottom: none;
}

.page-about .milestone-date {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.page-about .milestone-dot {
  position: absolute;
  left: -29px;
  top: 50%;
  transform: translateY(-50%);
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-flame);
  border: 2px solid var(--color-space);
  box-shadow: 0 0 0 3px rgba(255, 77, 36, 0.2);
}

.page-about .milestone-year {
  font-family: var(--font-heading);
  font-size: 2rem;
  line-height: 1.1;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: 0.02em;
}

.page-about .milestone-tag {
  font-size: 0.6875rem;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--color-flame);
  color: var(--color-white);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-left: 4px;
  white-space: nowrap;
}

.page-about .milestone-card h3 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  color: var(--color-white);
  margin: 0 0 8px;
  letter-spacing: 0.02em;
}

.page-about .milestone-card p {
  margin: 0;
  color: var(--color-mist);
  line-height: 1.7;
  font-size: 0.875rem;
}

.page-about .milestone-card--current {
  background: rgba(255, 77, 36, 0.08);
  border: 1px solid rgba(255, 77, 36, 0.28);
  padding: 16px 18px;
  border-radius: 6px;
}

.page-about .milestone-card--current h3 {
  color: var(--color-white);
}

.page-about .milestone-card--current p {
  color: var(--color-mist);
}

/* ---------- 技术架构 ---------- */
.page-about .about-tech {
  background: var(--color-white);
}

.page-about .tech-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-bottom: 36px;
}

.page-about .tech-copy p {
  color: var(--color-ink);
  line-height: 1.8;
  margin: 0 0 20px;
  font-size: 0.9375rem;
}

.page-about .tech-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .tech-features {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .tech-feature .card-tile h3 {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  margin: 0 0 8px;
  color: var(--color-space);
}

.page-about .tech-feature .card-tile p {
  color: var(--color-ink);
  font-size: 0.875rem;
  line-height: 1.65;
  margin: 0;
}

.page-about .tech-feature-num {
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-flame);
  display: block;
  margin-bottom: 8px;
}

.page-about .tech-image img {
  max-height: 420px;
  object-fit: cover;
}

/* ---------- 服务生态 ---------- */
.page-about .about-ecosystem {
  background: var(--color-ink);
}

.page-about .ecosystem-nodes {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 32px;
}

.page-about .ecosystem-node {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--about-card-radius);
  padding: 24px;
  height: 100%;
  transition: border-color 0.3s var(--ease-out), background 0.3s var(--ease-out);
}

.page-about .ecosystem-node:hover {
  border-color: rgba(255, 77, 36, 0.5);
  background: rgba(255, 77, 36, 0.06);
}

.page-about .node-index {
  font-family: var(--font-heading);
  font-size: 0.875rem;
  color: var(--color-flame);
  display: block;
  margin-bottom: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.page-about .ecosystem-node h3 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  color: var(--color-white);
  margin: 0 0 8px;
}

.page-about .ecosystem-node p {
  color: var(--color-mist);
  font-size: 0.875rem;
  line-height: 1.65;
  margin: 0;
}

.page-about .ecosystem-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 20px;
}

.page-about .ecosystem-note {
  color: rgba(229, 234, 240, 0.75);
  font-size: var(--fs-small);
  line-height: 1.7;
  max-width: 620px;
  margin: 0;
  border-left: 3px solid var(--color-ember);
  padding-left: 14px;
}

/* ---------- 本地化服务 ---------- */
.page-about .about-local {
  background: var(--color-mist);
}

.page-about .local-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-about .local-image img {
  max-height: 420px;
  object-fit: cover;
}

.page-about .local-content p {
  color: var(--color-ink);
  line-height: 1.8;
  margin: 0 0 16px;
  font-size: 0.9375rem;
}

.page-about .local-contact {
  background: var(--color-white);
  border-left: 4px solid var(--color-flame);
  border-radius: 6px;
  padding: 22px 24px;
  margin-top: 20px;
  box-shadow: var(--shadow-panel);
}

.page-about .local-contact .contact-label {
  color: var(--color-flame);
  font-weight: 700;
}

.page-about .local-contact p {
  margin-bottom: 12px;
}

.page-about .local-contact p:last-of-type {
  margin-bottom: 0;
}

.page-about .local-contact-note {
  font-size: var(--fs-small);
  color: var(--color-ink);
  opacity: 0.75;
  margin-top: 12px;
}

.page-about .local-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

/* ---------- 响应式：平板及以上 ---------- */
@media (min-width: 768px) {
  .page-about .about-hero-meta {
    gap: 12px;
  }

  .page-about .mission-stats {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .tech-features {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about .ecosystem-nodes {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about .mission-layout {
    grid-template-columns: 1fr 400px;
    align-items: start;
  }

  .page-about .local-layout {
    grid-template-columns: 1fr;
  }
}

/* ---------- 响应式：桌面端 ---------- */
@media (min-width: 992px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 56px;
  }

  .page-about .about-index {
    position: sticky;
    top: calc(var(--header-height) + 28px);
    flex-direction: column;
    gap: 2px;
    margin-top: 24px;
  }

  .page-about .about-grid {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: clamp(32px, 5vw, 72px);
  }

  .page-about .about-grid-notes {
    padding-top: 8px;
  }

  .page-about .tech-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: center;
    gap: 44px;
  }

  .page-about .tech-image {
    order: 2;
  }

  .page-about .tech-features {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .local-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 44px;
    align-items: start;
  }
}

/* ---------- 响应式：大桌面 ---------- */
@media (min-width: 1200px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1fr) 320px;
  }

  .page-about .ecosystem-nodes {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ---------- 减少动态效果偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }

  .page-about .about-index-item,
  .page-about .ecosystem-node {
    transition: none !important;
  }
}