.page-about {
  --page-sidebar-w: 220px;
  --page-timeline-pad: 48px;
  background: var(--color-bg);
  color: var(--color-text);
  overflow: hidden;
}

/* ---- Hero 区 ---- */
.page-about .about-hero {
  position: relative;
  border-bottom: 1px solid var(--color-line);
  overflow: hidden;
  background-color: var(--color-bg);
}

.page-about .about-hero__grid {
  position: absolute;
  inset: 0;
  z-index: 0;
  opacity: 0.7;
}

.page-about .about-hero__content {
  position: relative;
  z-index: 1;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: clamp(40px, 8vw, 96px) clamp(20px, 5vw, 48px) clamp(36px, 7vw, 72px);
}

.page-about .about-hero__kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-neon);
}

.page-about .about-hero h1 {
  margin: 16px 0 0;
  font-family: var(--font-display);
  font-size: clamp(52px, 12vw, 128px);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--color-text);
}

.page-about .about-hero__brand {
  display: block;
  margin-top: 18px;
  font-family: var(--font-body);
  font-size: clamp(16px, 3vw, 22px);
  font-weight: 600;
  letter-spacing: 0.22em;
  color: var(--color-muted);
  text-transform: none;
}

.page-about .about-hero__tagline {
  margin: 28px 0 0;
  font-family: var(--font-serif);
  font-size: clamp(18px, 3vw, 24px);
  font-style: italic;
  color: var(--color-gold);
}

.page-about .about-hero__lead {
  max-width: 660px;
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.9;
  color: var(--color-muted);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  max-width: 660px;
  margin-top: 40px;
  border: 1px solid var(--color-line);
  background: var(--color-line);
}

.page-about .hero-stat {
  background: var(--color-panel);
  padding: 14px 16px;
}

.page-about .hero-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(22px, 4vw, 28px);
  font-weight: 700;
  line-height: 1;
  color: var(--color-text);
}

.page-about .hero-stat__label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  color: var(--color-muted);
}

.page-about .about-hero__deco {
  position: absolute;
  top: 10%;
  right: 0;
  z-index: 0;
  font-family: var(--font-display);
  font-size: clamp(120px, 24vw, 280px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(232, 234, 246, 0.03);
  white-space: nowrap;
  pointer-events: none;
  user-select: none;
}

/* ---- 杂志式构成 ---- */
.page-about .about-magazine {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: clamp(32px, 6vw, 72px) clamp(20px, 5vw, 48px) clamp(48px, 8vw, 96px);
}

.page-about .about-index {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 24px;
  margin-bottom: 40px;
  padding: 14px 0;
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

.page-about .about-index__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.page-about .about-index__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-index__list a {
  display: inline-flex;
  gap: 8px;
  align-items: baseline;
  padding: 4px 0;
  color: var(--color-text);
  font-size: 15px;
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

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

.page-about .about-index__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-orange);
}

.page-about .about-index__note {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
  font-size: 13px;
  color: var(--color-muted);
}

/* ---- 章节通用 ---- */
.page-about .about-section {
  margin-bottom: clamp(56px, 10vw, 96px);
}

.page-about .about-section:last-child {
  margin-bottom: 0;
}

.page-about .about-section p {
  max-width: 72ch;
  margin-bottom: 18px;
  color: var(--color-muted);
  line-height: 1.85;
}

.page-about .about-section p.about-section__lead {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--color-gold);
}

.page-about .about-subtitle {
  margin: 24px 0 12px;
  font-family: var(--font-display);
  font-size: 20px;
  color: var(--color-text);
}

.page-about .section-heading {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  align-items: baseline;
  margin-bottom: 28px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--color-line);
}

.page-about .section-heading__index {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--color-neon);
}

.page-about .section-heading__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(32px, 6vw, 48px);
  font-weight: 700;
  line-height: 0.95;
  text-transform: uppercase;
  color: var(--color-text);
}

.page-about .section-heading__meta {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-muted);
}

/* ---- 编辑注记 ---- */
.page-about .editor-note {
  position: relative;
  margin: 32px 0;
  padding: 20px 20px 20px 28px;
  border-left: 4px solid var(--color-orange);
  background: var(--color-panel);
  font-family: var(--font-serif);
  font-size: 18px;
  line-height: 1.7;
  color: var(--color-text);
}

.page-about .editor-note p {
  margin: 0;
  color: var(--color-text);
  max-width: none;
}

.page-about .editor-note--divider {
  max-width: 520px;
  margin: 48px auto;
  padding: 24px 0;
  border-left: none;
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
  background: transparent;
  text-align: center;
  font-size: 15px;
  color: var(--color-muted);
}

/* ---- 发展历程时间线 ---- */
.page-about .about-timeline {
  position: relative;
  margin: 28px 0 8px;
  padding-left: var(--page-timeline-pad);
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  top: 4px;
  bottom: 6px;
  left: 12px;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-neon), var(--color-line) 75%);
}

.page-about .timeline-item {
  position: relative;
  max-width: 660px;
  padding: 0 0 28px;
}

.page-about .timeline-item::before {
  content: "";
  position: absolute;
  left: calc(6px - var(--page-timeline-pad));
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-bg);
  border: 3px solid var(--color-neon);
  box-shadow: 0 0 0 5px rgba(0, 255, 136, 0.12);
}

.page-about .timeline-item__year {
  display: inline-block;
  margin-bottom: 10px;
  padding: 2px 10px;
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-orange);
  background: rgba(255, 107, 53, 0.1);
  border: 1px solid rgba(255, 107, 53, 0.25);
}

.page-about .timeline-item__card {
  padding: 18px 20px;
  background: var(--color-panel);
  border: 1px solid var(--color-line);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.page-about .timeline-item__card h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 22px;
  color: var(--color-text);
}

.page-about .timeline-item__card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-muted);
}

@media (hover: hover) {
  .page-about .timeline-item__card:hover {
    transform: translateY(-3px);
    border-color: var(--color-neon);
  }
}

/* ---- 媒体图片 ---- */
.page-about .about-media {
  margin: 32px 0;
  padding: 10px 10px 8px;
  border: 1px solid var(--color-line);
  background: var(--color-panel);
}

.page-about .about-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  background: #0F1632;
}

.page-about .about-media figcaption {
  padding: 12px 6px 4px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--color-muted);
}

/* ---- 数据指标 ---- */
.page-about .about-data-metrics {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  max-width: 720px;
  margin: 28px 0;
  border: 1px solid var(--color-line);
  background: var(--color-line);
}

.page-about .about-metric {
  padding: 18px 16px;
  background: var(--color-panel);
}

.page-about .about-metric__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(20px, 4vw, 26px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--color-neon);
}

.page-about .about-metric__label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  color: var(--color-muted);
}

/* ---- 标准列表 ---- */
.page-about .about-bullet-list {
  max-width: 720px;
  margin: 0 0 24px;
  padding: 0;
  list-style: none;
}

.page-about .about-bullet-list li {
  position: relative;
  padding: 10px 0 10px 26px;
  border-bottom: 1px solid rgba(42, 53, 96, 0.55);
  color: var(--color-muted);
  line-height: 1.8;
  font-size: 15px;
}

.page-about .about-bullet-list li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 18px;
  width: 8px;
  height: 8px;
  background: var(--color-orange);
  transform: rotate(45deg);
}

/* ---- 团队列 ---- */
.page-about .about-team-cols {
  display: grid;
  gap: 16px;
  margin: 28px 0;
}

.page-about .about-team-col {
  padding: 20px;
  background: var(--color-panel);
  border: 1px solid var(--color-line);
  border-left: 3px solid var(--color-neon);
}

.page-about .about-team-col h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 20px;
  color: var(--color-text);
}

.page-about .about-team-col p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-muted);
}

/* ---- 认证与徽章 ---- */
.page-about .about-cert-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 24px 0;
}

/* ---- CTA ---- */
.page-about .about-cta {
  margin-top: 48px;
  padding: 32px 24px;
  border: 2px solid var(--color-line);
  background: linear-gradient(135deg, rgba(0, 255, 136, 0.06), transparent 55%), var(--color-panel);
  text-align: center;
}

.page-about .about-cta p.about-cta__text {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-size: clamp(20px, 4vw, 26px);
  font-weight: 700;
  color: var(--color-text);
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

/* ---- 响应式：平板及以上 ---- */
@media (min-width: 768px) {
  .page-about .about-hero h1 {
    font-size: clamp(88px, 14vw, 140px);
  }

  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .about-data-metrics {
    grid-template-columns: repeat(4, 1fr);
  }

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

/* ---- 响应式：桌面端杂志布局 ---- */
@media (min-width: 900px) {
  .page-about .about-magazine {
    display: grid;
    grid-template-columns: var(--page-sidebar-w) minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    flex-direction: column;
    align-items: flex-start;
    gap: 18px;
    margin: 0;
    padding: 8px 0 8px 20px;
    border: none;
    border-left: 3px solid var(--color-line);
  }

  .page-about .about-index__list {
    flex-direction: column;
    gap: 10px;
  }

  .page-about .about-index__list a {
    font-size: 15px;
  }

  .page-about .about-index__note {
    margin-left: 0;
    margin-top: 20px;
    font-size: 12px;
    line-height: 1.6;
  }
}