/* ===== page-about 专属样式 ===== */
.page-about {
  --ab-hero-left: 55%;
  --ab-flow-color: rgba(57, 255, 20, 0.08);
  --ab-glow-size: 60vw;
  --ab-card-min: 260px;
  --ab-gap: 2rem;
  --ab-section-py: 5rem;
  display: block;
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 1.5rem 2.5rem;
  font-family: 'Inter', sans-serif;
  color: var(--color-text-white, #FFFFFF);
  background-color: var(--color-bg-dark, #0D0D0D);
  position: relative;
}

/* ---------- 面包屑 ---------- */
.page-about__breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem 0.6rem;
  font-size: 0.8125rem;
  font-family: 'JetBrains Mono', monospace;
  color: var(--color-text-gray, #888888);
  margin-bottom: 1.5rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.page-about__breadcrumb a {
  color: var(--color-electric-blue, #00BFFF);
  text-decoration: none;
  transition: color 0.25s;
}
.page-about__breadcrumb a:hover {
  color: var(--color-neon-green, #39FF14);
}
.page-about__breadcrumb-sep {
  color: var(--color-text-muted, #666666);
}
.page-about__breadcrumb [aria-current="page"] {
  color: var(--color-text-white, #FFFFFF);
  font-weight: 600;
}

/* ---------- 分屏首屏 ---------- */
.page-about__hero-split {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
  padding: 3rem 0 2rem;
  position: relative;
  min-height: 70vh;
  align-items: flex-start;
}
.page-about__hero-left {
  flex: 0 0 auto;
  width: 100%;
  z-index: 2;
  position: relative;
}
.page-about__hero-title {
  font-family: 'Orbitron', sans-serif;
  font-weight: 900;
  font-size: 2.8rem;
  line-height: 1.1;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: linear-gradient(135deg, #39FF14, #00BFFF, #FF4500);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin: 0 0 0.75rem;
}
.page-about__hero-sub {
  font-family: 'Orbitron', sans-serif;
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.12em;
  color: var(--color-electric-blue, #00BFFF);
  text-transform: uppercase;
  margin: 0 0 1.2rem;
  opacity: 0.9;
}
.page-about__hero-desc {
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--color-text-gray, #888888);
  max-width: 32em;
  margin: 0 0 2rem;
}
.page-about__hero-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 1.8rem 2.8rem;
  margin-top: 0.5rem;
}
.page-about__metric-item {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}
.page-about__metric-value {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  font-size: 2rem;
  line-height: 1;
  color: var(--color-neon-green, #39FF14);
  letter-spacing: 0.04em;
}
.page-about__metric-label {
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted, #666666);
}

/* ---------- 右侧视觉 ---------- */
.page-about__hero-right {
  position: relative;
  width: 100%;
  max-width: 700px;
  margin-left: auto;
  z-index: 1;
  overflow: hidden;
  border-radius: 4px;
  border: 1px solid var(--color-border, #333333);
  background: var(--color-bg-medium, #1A1A1A);
}
.page-about__hero-right img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  position: relative;
  z-index: 2;
  mix-blend-mode: screen;
  opacity: 0.85;
}
.page-about__hero-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  width: var(--ab-glow-size);
  height: var(--ab-glow-size);
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(0,191,255,0.12) 0%, rgba(57,255,20,0.05) 40%, transparent 70%);
  pointer-events: none;
  z-index: 0;
  animation: ab-glow-pulse 6s ease-in-out infinite alternate;
}
@keyframes ab-glow-pulse {
  0% { opacity: 0.4; transform: translate(-50%, -50%) scale(1); }
  100% { opacity: 0.9; transform: translate(-50%, -50%) scale(1.15); }
}

/* ---------- 通用段落 ---------- */
.page-about__section {
  padding: var(--ab-section-py) 0;
  border-top: 1px solid var(--color-border, #333333);
  position: relative;
}
.page-about__section:first-of-type {
  border-top: none;
}
.page-about__section-inner {
  max-width: 1200px;
  margin: 0 auto;
}
.page-about__section-label {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  font-size: 0.8125rem;
  letter-spacing: 0.15em;
  color: var(--color-fire-orange, #FF4500);
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}
.page-about__section-heading {
  font-family: 'Orbitron', sans-serif;
  font-weight: 900;
  font-size: 2.2rem;
  line-height: 1.15;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-white, #FFFFFF);
  margin: 0 0 2.5rem;
}

/* ---------- 品牌定位卡片 ---------- */
.page-about__vision-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--ab-gap);
}
.page-about__vision-card {
  background: var(--color-bg-medium, #1A1A1A);
  border: 1px solid var(--color-border, #333333);
  border-radius: 4px;
  padding: 1.8rem 1.5rem 2rem;
  transition: border-color 0.3s, transform 0.3s;
  position: relative;
}
.page-about__vision-card:hover {
  border-color: var(--color-neon-green, #39FF14);
  transform: translateY(-3px);
}
.page-about__vision-icon {
  display: inline-block;
  font-size: 2rem;
  line-height: 1;
  color: var(--color-electric-blue, #00BFFF);
  margin-bottom: 0.75rem;
  filter: drop-shadow(0 0 6px rgba(0,191,255,0.3));
}
.page-about__card-title {
  font-family: 'Orbitron', sans-serif;
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 0.04em;
  margin: 0 0 0.6rem;
  color: var(--color-text-white, #FFFFFF);
}
.page-about__card-text {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--color-text-gray, #888888);
  margin: 0;
}

/* ---------- 技术演进 ---------- */
.page-about__evolution-layout {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  align-items: flex-start;
}
.page-about__evolution-content {
  flex: 1 1 auto;
}
.page-about__evolution-text {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text-gray, #888888);
  margin: 0 0 1.2rem;
  max-width: 36em;
}
.page-about__evolution-tag {
  display: inline-block;
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  font-size: 0.875rem;
  padding: 0.4rem 1rem;
  border: 1px solid var(--color-neon-green, #39FF14);
  color: var(--color-neon-green, #39FF14);
  letter-spacing: 0.06em;
  margin-top: 0.5rem;
  border-radius: 2px;
}
.page-about__evolution-visual {
  position: relative;
  width: 100%;
  max-width: 500px;
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid var(--color-border, #333333);
  background: var(--color-bg-medium, #1A1A1A);
}
.page-about__evolution-img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  mix-blend-mode: screen;
  opacity: 0.8;
}
.page-about__evolution-line {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, #39FF14, #00BFFF, #FF4500);
  z-index: 2;
}

/* ---------- 核心价值 ---------- */
.page-about__values-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.8rem;
  margin-bottom: 2.5rem;
}
.page-about__value-block {
  position: relative;
  padding: 1.2rem 1.2rem 1.8rem;
  border-left: 3px solid var(--color-border, #333333);
  transition: border-left-color 0.3s;
}
.page-about__value-block:hover {
  border-left-color: var(--color-fire-orange, #FF4500);
}
.page-about__value-number {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 900;
  font-size: 2.8rem;
  line-height: 1;
  color: rgba(255,69,0,0.12);
  position: absolute;
  top: -0.2rem;
  right: 0.5rem;
  pointer-events: none;
  user-select: none;
}
.page-about__value-title {
  font-family: 'Orbitron', sans-serif;
  font-weight: 700;
  font-size: 1.3rem;
  letter-spacing: 0.04em;
  color: var(--color-text-white, #FFFFFF);
  margin: 0 0 0.6rem;
}
.page-about__value-text {
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--color-text-gray, #888888);
  margin: 0 0 1rem;
  max-width: 32em;
}
.page-about__value-bar {
  width: 3rem;
  height: 2px;
  background: linear-gradient(90deg, var(--color-fire-orange, #FF4500), transparent);
  transition: width 0.4s;
}
.page-about__value-block:hover .page-about__value-bar {
  width: 6rem;
}
.page-about__values-extra {
  width: 100%;
  max-width: 500px;
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid var(--color-border, #333333);
  background: var(--color-bg-medium, #1A1A1A);
  margin-top: 0.5rem;
}
.page-about__values-img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  mix-blend-mode: screen;
  opacity: 0.75;
}

/* ---------- 底部连接线 ---------- */
.page-about__cta-line {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem 2rem;
  padding: 2.5rem 0 1rem;
  border-top: 1px solid var(--color-border, #333333);
  margin-top: 1rem;
}
.page-about__cta-link {
  font-family: 'Orbitron', sans-serif;
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-white, #FFFFFF);
  text-decoration: none;
  padding: 0.5rem 0;
  position: relative;
  transition: color 0.25s;
}
.page-about__cta-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: linear-gradient(90deg, #39FF14, #00BFFF);
  transition: width 0.35s ease;
}
.page-about__cta-link:hover {
  color: var(--color-neon-green, #39FF14);
}
.page-about__cta-link:hover::after {
  width: 100%;
}
.page-about__cta-link--outline {
  color: var(--color-text-gray, #888888);
  border: 1px solid var(--color-border, #333333);
  padding: 0.5rem 1.2rem;
  border-radius: 2px;
  transition: border-color 0.25s, color 0.25s;
}
.page-about__cta-link--outline::after {
  display: none;
}
.page-about__cta-link--outline:hover {
  border-color: var(--color-electric-blue, #00BFFF);
  color: var(--color-electric-blue, #00BFFF);
}

/* ===== 响应式 – 平板及以上 ===== */
@media (min-width: 640px) {
  .page-about {
    padding: 0 2rem 3rem;
  }
  .page-about__hero-title {
    font-size: 3.6rem;
  }
  .page-about__hero-sub {
    font-size: 1.125rem;
  }
  .page-about__hero-desc {
    font-size: 1.125rem;
  }
  .page-about__metric-value {
    font-size: 2.4rem;
  }
  .page-about__section-heading {
    font-size: 2.6rem;
  }
  .page-about__vision-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-about__values-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
  }
  .page-about__evolution-layout {
    flex-direction: row;
    align-items: center;
  }
}

/* ===== 响应式 – 桌面 ===== */
@media (min-width: 1024px) {
  .page-about {
    padding: 0 3rem 4rem;
  }
  .page-about__hero-split {
    flex-direction: row;
    padding: 4rem 0 3rem;
    min-height: 80vh;
    align-items: center;
  }
  .page-about__hero-left {
    width: var(--ab-hero-left);
    padding-right: 3rem;
  }
  .page-about__hero-right {
    width: calc(100% - var(--ab-hero-left));
    max-width: none;
    margin-left: 0;
  }
  .page-about__hero-title {
    font-size: 4.8rem;
  }
  .page-about__hero-sub {
    font-size: 1.25rem;
  }
  .page-about__hero-desc {
    font-size: 1.2rem;
  }
  .page-about__metric-value {
    font-size: 2.8rem;
  }
  .page-about__section-heading {
    font-size: 3rem;
  }
  .page-about__vision-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }
  .page-about__values-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 2.5rem;
  }
  .page-about__evolution-content {
    max-width: 55%;
  }
  .page-about__evolution-visual {
    max-width: 40%;
  }
  .page-about__values-extra {
    max-width: 40%;
  }
  .page-about__cta-link {
    font-size: 1.125rem;
  }
}

/* ===== 大桌面边距优化 ===== */
@media (min-width: 1440px) {
  .page-about {
    padding: 0 4rem 5rem;
  }
  .page-about__hero-title {
    font-size: 5.6rem;
  }
}