/* ===== 页面专属 CSS — .page-about ===== */
.page-about {
  --about-hero-min-height: 100vh;
  --about-orange: var(--c-accent-orange, #FF6B35);
  --about-green: var(--c-accent-green, #39FF14);
  --about-blue: var(--c-primary-blue, #1A3A6B);
  --about-dark: var(--c-primary-dark, #0B1A2E);
  --about-surface: var(--c-surface-dark, #0F172A);
  --about-text: var(--c-text-primary, #F1F5F9);
  --about-text-secondary: var(--c-text-secondary, #94A3B8);
  --about-glow: 0 0 20px rgba(57, 255, 20, 0.25);
  --about-card-radius: var(--radius-md, 12px);
}

/* ---- 首屏 ---- */
.page-about .about-hero {
  position: relative;
  min-height: var(--about-hero-min-height);
  display: flex;
  align-items: center;
  background: var(--grad-hero);
  overflow: hidden;
}

.page-about .about-hero-inner {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1.2rem;
  padding-top: 10rem;
  padding-bottom: 3rem;
  position: relative;
  z-index: 2;
}

.page-about .about-hero-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--about-green);
  border: 1px solid var(--about-green);
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius-sm);
}

.page-about .about-hero-title {
  font-family: var(--font-heading);
  font-weight: 800;
  font-style: italic;
  font-size: clamp(2.4rem, 8vw, 5rem);
  line-height: 1.08;
  color: var(--about-text);
  max-width: 10ch;
}

.page-about .about-hero-title em {
  color: var(--about-green);
  font-style: italic;
  text-shadow: var(--about-glow);
}

.page-about .about-hero-sub {
  font-family: var(--font-body);
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  line-height: 1.6;
  color: var(--about-text-secondary);
  max-width: 46ch;
}

.page-about .about-hero-visual {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.page-about .about-hero-glow {
  position: absolute;
  top: -20%;
  right: -10%;
  width: 70%;
  height: 120%;
  background: radial-gradient(ellipse at 70% 50%, rgba(255, 107, 53, 0.15) 0%, transparent 70%);
  mix-blend-mode: screen;
}

.page-about .about-hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
  opacity: 0.25;
}

/* ---- 面包屑 ---- */
.page-about .about-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding-top: 2rem;
  padding-bottom: 0.5rem;
  font-size: 0.85rem;
  color: var(--about-text-secondary);
}

.page-about .about-breadcrumb a {
  color: var(--about-orange);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition);
}

.page-about .about-breadcrumb a:hover,
.page-about .about-breadcrumb a:focus-visible {
  border-bottom-color: var(--about-orange);
}

.page-about .about-breadcrumb-sep {
  color: var(--about-text-secondary);
}

/* ---- 品牌故事 ---- */
.page-about .about-story {
  background: var(--about-surface);
  padding: 4rem 0;
}

.page-about .about-story-inner {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.page-about .about-story-text {
  flex: 1;
}

.page-about .about-story-text .section-label {
  margin-bottom: 0.75rem;
  display: inline-block;
}

.page-about .about-story-text h2 {
  font-family: var(--font-heading);
  font-weight: 800;
  font-style: italic;
  font-size: clamp(1.8rem, 4vw, 3rem);
  line-height: 1.1;
  color: var(--about-text);
  margin-bottom: 1.2rem;
}

.page-about .about-story-text p {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--about-text-secondary);
  margin-bottom: 1rem;
  max-width: 68ch;
}

.page-about .about-story-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  padding: 1.5rem 0;
}

.page-about .about-stat-item {
  background: rgba(255, 255, 255, 0.04);
  border-radius: var(--about-card-radius);
  padding: 1.2rem 1rem;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.page-about .about-stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700;
  color: var(--about-green);
  text-shadow: var(--about-glow);
}

.page-about .about-stat-label {
  font-family: var(--font-body);
  font-size: 0.8rem;
  color: var(--about-text-secondary);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* ---- 核心能力 ---- */
.page-about .about-capabilities {
  padding: 4rem 0;
  background: var(--about-dark);
}

.page-about .about-cap-header {
  margin-bottom: 2.5rem;
}

.page-about .about-cap-header .section-label {
  display: inline-block;
  margin-bottom: 0.6rem;
}

.page-about .about-cap-header h2 {
  font-family: var(--font-heading);
  font-weight: 800;
  font-style: italic;
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  color: var(--about-text);
  margin-bottom: 0.5rem;
}

.page-about .about-cap-desc {
  font-family: var(--font-body);
  color: var(--about-text-secondary);
  max-width: 56ch;
}

.page-about .about-cap-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.page-about .about-cap-card {
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--about-card-radius);
  padding: 2rem 1.5rem;
  border: 1px solid rgba(255, 255, 255, 0.06);
  transition: all var(--transition);
  cursor: default;
}

.page-about .about-cap-card:hover,
.page-about .about-cap-card:focus-within {
  border-color: var(--about-green);
  box-shadow: var(--about-glow);
  transform: translateY(-3px);
}

.page-about .about-cap-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 1rem;
  color: var(--about-orange);
}

.page-about .about-cap-icon svg {
  width: 100%;
  height: 100%;
  display: block;
}

.page-about .about-cap-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-style: italic;
  font-size: 1.15rem;
  color: var(--about-text);
  margin-bottom: 0.5rem;
}

.page-about .about-cap-text {
  font-family: var(--font-body);
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--about-text-secondary);
}

/* ---- 数据哲学 ---- */
.page-about .about-philosophy {
  padding: 4rem 0;
  background: var(--about-surface);
}

.page-about .about-phil-header {
  margin-bottom: 2.5rem;
}

.page-about .about-phil-header .section-label {
  display: inline-block;
  margin-bottom: 0.6rem;
}

.page-about .about-phil-header h2 {
  font-family: var(--font-heading);
  font-weight: 800;
  font-style: italic;
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  color: var(--about-text);
}

.page-about .about-phil-timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.page-about .about-phil-line {
  position: absolute;
  left: 12px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--about-green), var(--about-orange));
  opacity: 0.5;
}

.page-about .about-phil-node {
  display: flex;
  align-items: flex-start;
  gap: 1.2rem;
  position: relative;
  padding-left: 28px;
}

.page-about .about-phil-marker {
  position: absolute;
  left: 4px;
  top: 4px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--about-green);
  box-shadow: var(--about-glow);
  flex-shrink: 0;
}

.page-about .about-phil-content h3 {
  font-family: var(--font-heading);
  font-weight: 700;
  font-style: italic;
  font-size: 1.1rem;
  color: var(--about-orange);
  margin-bottom: 0.3rem;
}

.page-about .about-phil-content p {
  font-family: var(--font-body);
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--about-text-secondary);
  max-width: 52ch;
}

.page-about .about-phil-visual {
  margin-top: 2rem;
  border-radius: var(--about-card-radius);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

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

/* ---- 引导区 ---- */
.page-about .about-cta-section {
  padding: 4rem 0;
  background: var(--about-dark);
  text-align: center;
}

.page-about .about-cta-title {
  font-family: var(--font-heading);
  font-weight: 800;
  font-style: italic;
  font-size: clamp(1.6rem, 3.6vw, 2.4rem);
  color: var(--about-text);
  margin-bottom: 0.8rem;
}

.page-about .about-cta-text {
  font-family: var(--font-body);
  color: var(--about-text-secondary);
  max-width: 44ch;
  margin: 0 auto 1.6rem;
}

.page-about .about-cta-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
}

.page-about .about-cta-links .btn-outline {
  --btn-border: var(--about-green);
  --btn-text: var(--about-green);
  --btn-hover-bg: rgba(57, 255, 20, 0.08);
}

/* ---- 响应式 ---- */
@media (min-width: 640px) {
  .page-about .about-story-inner {
    flex-direction: row;
    align-items: flex-start;
  }
  .page-about .about-story-text {
    flex: 0 0 60%;
  }
  .page-about .about-story-stats {
    flex: 0 0 35%;
    grid-template-columns: 1fr;
    align-self: center;
  }
  .page-about .about-cap-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-about .about-phil-line {
    left: 16px;
  }
  .page-about .about-phil-node {
    padding-left: 36px;
  }
  .page-about .about-phil-marker {
    left: 8px;
    width: 18px;
    height: 18px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-cap-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  .page-about .about-hero-title {
    max-width: 12ch;
  }
}