.page-about {
  --about-space: 64px;
  --about-panel: #1a1025;
  --about-muted: #8a8f9e;
  --about-purple-line: rgba(176, 38, 255, 0.16);
  --about-blue-line: rgba(0, 229, 255, 0.28);
  --about-grid: rgba(176, 38, 255, 0.05);
  background-color: var(--bg-deep);
  color: var(--text-light);
  font-family: var(--font-body);
  line-height: 1.75;
  overflow-x: hidden;
}

/* ===== Hero ===== */
.page-about .about-hero {
  position: relative;
  padding: 124px 0 72px;
  overflow: hidden;
  background:
    radial-gradient(ellipse at 82% 12%, rgba(176, 38, 255, 0.22), transparent 56%),
    radial-gradient(ellipse at 8% 88%, rgba(0, 229, 255, 0.14), transparent 48%),
    var(--bg-deep);
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--about-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--about-grid) 1px, transparent 1px);
  background-size: 52px 52px;
  -webkit-mask-image: radial-gradient(circle at 62% 36%, rgba(0, 0, 0, 0.9) 0%, transparent 74%);
  mask-image: radial-gradient(circle at 62% 36%, rgba(0, 0, 0, 0.9) 0%, transparent 74%);
  pointer-events: none;
}
.page-about .about-hero__beam {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(176, 38, 255, 0.7) 25%, rgba(0, 229, 255, 0.6) 55%, transparent 80%);
  background-size: 200% 100%;
  animation: about-beam-flow 6s ease-in-out infinite;
  opacity: 0.85;
  pointer-events: none;
}
@keyframes about-beam-flow {
  0% { background-position: 0% 50%; opacity: 0.35; }
  50% { opacity: 0.9; }
  100% { background-position: 100% 50%; opacity: 0.35; }
}
.page-about .about-hero__inner { position: relative; z-index: 1; }
.page-about .breadcrumb { margin-bottom: 44px; }
.page-about .about-hero__index {
  margin-bottom: 20px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.24em;
  color: var(--neon-green);
  text-transform: uppercase;
}
.page-about .about-hero__index-num { color: var(--neon-purple); margin-right: 6px; }
.page-about .about-hero__title {
  font-family: var(--font-display);
  font-size: clamp(30px, 5vw, 56px);
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: 0.02em;
  margin-bottom: 26px;
}
.page-about .about-hero__brand {
  color: var(--neon-purple);
  text-shadow: 0 0 20px rgba(176, 38, 255, 0.55);
}
.page-about .about-hero__lead {
  max-width: 660px;
  margin-bottom: 36px;
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.9;
}
.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.page-about .about-hero__meta-item {
  padding: 6px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--neon-blue);
  border: 1px solid rgba(0, 229, 255, 0.28);
  background: rgba(0, 229, 255, 0.04);
}

/* ===== 通用标签与标题 ===== */
.page-about .about-section-tag {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--neon-purple);
  text-transform: uppercase;
}
.page-about h2 {
  margin-bottom: 22px;
  font-family: var(--font-display);
  font-size: clamp(24px, 3.4vw, 38px);
  font-weight: 700;
  line-height: 1.32;
  letter-spacing: 0.02em;
}

/* ===== 品牌起源 ===== */
.page-about .about-origin { padding: var(--about-space) 0; }
.page-about .about-origin__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  align-items: center;
}
.page-about .about-origin__content p {
  margin-bottom: 18px;
  color: var(--text-muted);
  font-size: 15px;
}
.page-about .about-origin__leadtext {
  border-left: 2px solid var(--neon-purple);
  padding-left: 18px;
  color: var(--text-light) !important;
  font-size: 16px !important;
}
.page-about .about-origin__link { margin-top: 10px; }
.page-about .about-origin__visual {
  position: relative;
  margin: 0;
}
.page-about .about-origin__visual::before {
  content: "";
  position: absolute;
  top: 18px;
  left: 18px;
  width: 100%;
  height: 100%;
  border: 1px solid var(--about-blue-line);
  background-image: linear-gradient(135deg, rgba(176, 38, 255, 0.07), rgba(0, 229, 255, 0.04));
  opacity: 0.7;
  transition: opacity var(--transition);
  pointer-events: none;
}
.page-about .about-origin__visual:hover::before { opacity: 1; }
.page-about .about-origin__visual img,
.page-about .about-tech__visual img,
.page-about .about-service__visual img {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--about-purple-line);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
}

/* ===== 里程碑 ===== */
.page-about .about-milestones { padding: var(--about-space) 0; }
.page-about .about-milestones__intro {
  max-width: 560px;
  margin-top: -6px;
  color: var(--text-muted);
  font-size: 15px;
}
.page-about .about-timeline {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-top: 40px;
  scrollbar-width: thin;
  scrollbar-color: rgba(176, 38, 255, 0.5) transparent;
}
.page-about .about-timeline__item {
  position: relative;
  padding: 28px 24px 30px 30px;
  background: var(--about-panel);
  border: 1px solid var(--about-purple-line);
  transition: border-color var(--transition), transform var(--transition);
}
.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 24px;
  bottom: 24px;
  width: 2px;
  background: linear-gradient(180deg, var(--neon-purple), var(--neon-blue));
}
.page-about .about-timeline__item:hover {
  border-color: rgba(0, 229, 255, 0.55);
  transform: translateY(-4px);
}
.page-about .about-timeline__phase {
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--neon-blue);
}
.page-about .about-timeline__version {
  margin-bottom: 8px;
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--neon-purple);
  text-shadow: 0 0 16px rgba(176, 38, 255, 0.3);
}
.page-about .about-timeline__item h3 { margin-bottom: 10px; font-size: 18px; color: var(--text-light); }
.page-about .about-timeline__item p:last-child { color: var(--text-muted); font-size: 14px; }

/* ===== 数据带 ===== */
.page-about .about-stats {
  padding: 52px 0;
  background: linear-gradient(135deg, var(--bg-dark), #150a20);
  border-top: 1px solid var(--about-purple-line);
  border-bottom: 1px solid var(--about-purple-line);
}
.page-about .about-stats__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 36px 20px;
  text-align: center;
}
.page-about .about-stats__num {
  margin-bottom: 4px;
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  color: var(--neon-green);
  text-shadow: 0 0 18px rgba(57, 255, 20, 0.32);
}
.page-about .about-stats__label { color: var(--text-muted); font-size: 14px; letter-spacing: 0.06em; }

/* ===== 技术力量 ===== */
.page-about .about-tech { padding: var(--about-space) 0; }
.page-about .about-tech__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  align-items: center;
}
.page-about .about-tech__content p { color: var(--text-muted); font-size: 15px; }
.page-about .about-tech__list {
  margin: 20px 0 32px;
  padding: 0;
  list-style: none;
}
.page-about .about-tech__list li {
  position: relative;
  margin-bottom: 12px;
  padding-left: 30px;
  color: var(--text-muted);
  font-size: 14px;
}
.page-about .about-tech__list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 9px;
  width: 13px;
  height: 13px;
  background: var(--neon-blue);
  clip-path: polygon(50% 0, 100% 100%, 0 100%);
}

/* ===== 服务承诺 ===== */
.page-about .about-service { padding: var(--about-space) 0; }
.page-about .about-service__header {
  display: grid;
  gap: 14px;
  margin-bottom: 8px;
}
.page-about .about-service__header-note {
  max-width: 320px;
  color: var(--text-muted);
  font-size: 14px;
}
.page-about .about-service__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 36px;
}
.page-about .about-service__card {
  padding: 32px 28px;
  background: var(--about-panel);
  border: 1px solid var(--about-purple-line);
  transition: border-color var(--transition), transform var(--transition);
}
.page-about .about-service__card:hover {
  border-color: var(--neon-blue);
  transform: translateY(-4px);
}
.page-about .about-service__num {
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--neon-blue);
}
.page-about .about-service__card h3 { margin-bottom: 12px; font-size: 18px; color: var(--text-light); }
.page-about .about-service__card p { color: var(--text-muted); font-size: 14px; } 
.page-about .about-service__link {
  display: inline-block;
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--neon-blue);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}
.page-about .about-service__link:hover {
  color: var(--neon-purple);
  border-color: currentColor;
}
.page-about .about-service__visual { margin: 44px auto 0; max-width: 640px; }

/* ===== 运营理念与信任 ===== */
.page-about .about-trust { padding: calc(var(--about-space) * 1.4) 0; }
.page-about .about-trust__inner {
  padding: 60px 24px;
  background: var(--about-panel);
  border-top: 1px solid var(--about-purple-line);
  border-bottom: 1px solid var(--about-purple-line);
  text-align: center;
}
.page-about .about-trust__quote {
  margin: 24px auto 22px;
  max-width: 460px;
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1.8;
  color: var(--neon-green);
  border: none;
}
.page-about .about-trust__text {
  max-width: 660px;
  margin: 0 auto 36px;
  color: var(--text-muted);
  font-size: 15px;
  text-align: left;
}
.page-about .about-trust__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
}

/* ===== 滚动条与动画 ===== */
.page-about .about-timeline::-webkit-scrollbar { height: 6px; }
.page-about .about-timeline::-webkit-scrollbar-thumb { background: rgba(176, 38, 255, 0.5); }
.page-about .about-timeline::-webkit-scrollbar-track { background: rgba(255, 255, 255, 0.04); }

/* ===== 响应式 ===== */
@media (min-width: 768px) {
  .page-about .about-stats__grid {
    grid-template-columns: repeat(4, 1fr);
  }
  .page-about .about-service__grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-about .about-trust__inner {
    padding: 76px 48px;
  }
}

@media (min-width: 960px) {
  .page-about {
    --about-space: 112px;
  }
  .page-about .about-hero { padding: 172px 0 104px; }
  .page-about .about-hero__lead { max-width: 700px; }
  .page-about .about-origin__grid { grid-template-columns: 6fr 5fr; gap: 72px; }
  .page-about .about-tech__grid { grid-template-columns: 6fr 5fr; gap: 72px; }
  .page-about .about-tech__content { order: 1; }
  .page-about .about-tech__visual { order: 2; }
  .page-about .about-timeline {
    flex-direction: row;
    gap: 24px;
    overflow-x: auto;
    padding-bottom: 14px;
    scroll-snap-type: x proximity;
  }
  .page-about .about-timeline__item {
    flex: 0 0 340px;
    scroll-snap-align: start;
  }
  .page-about .about-service__header {
    grid-template-columns: 1fr auto;
    align-items: end;
  }
  .page-about .about-service__header-note { text-align: right; }
}