/* ========== 品牌故事页 /story/ ========== */
.page-about {
  --about-green: #C8FF00;
  --about-cyan: #00E5FF;
  --about-gray: #8A929B;
  --about-dark: #131A22;
  font-family: var(--font-body);
  color: var(--color-text);
  background:
    radial-gradient(1200px 600px at 85% 0%, rgba(0, 229, 255, 0.08), transparent 60%),
    radial-gradient(900px 500px at 10% 40%, rgba(200, 255, 0, 0.05), transparent 55%),
    var(--color-bg);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 88px 0 72px;
  border-bottom: 1px solid rgba(138, 146, 155, 0.18);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: 96px;
  right: -120px;
  width: 320px;
  height: 320px;
  border: 1px solid rgba(200, 255, 0, 0.22);
  transform: skewX(-12deg) rotate(8deg);
  pointer-events: none;
  z-index: 0;
}

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

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

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

.page-about .about-hero-copy {
  max-width: 720px;
}

.page-about .about-hero-copy .eyebrow {
  color: var(--about-cyan);
  font-size: 13px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.page-about .about-hero-copy h1 {
  font-family: var(--font-head);
  font-style: italic;
  font-size: clamp(3.2rem, 10vw, 6.5rem);
  line-height: 0.92;
  letter-spacing: -0.04em;
  margin: 0 0 24px;
  color: var(--color-text);
  text-transform: uppercase;
}

.page-about .about-hero-copy h1::after {
  content: "";
  display: block;
  width: 72px;
  height: 6px;
  background: var(--about-green);
  margin-top: 16px;
}

.page-about .about-hero-lead {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--about-gray);
  max-width: 60ch;
  margin-bottom: 32px;
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.page-about .about-hero-panel {
  background: var(--about-dark);
  border: 1px solid rgba(138, 146, 155, 0.25);
  padding: 24px;
  position: relative;
}

.page-about .about-hero-panel::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 48px;
  height: 3px;
  background: var(--about-cyan);
}

.page-about .about-status-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.page-about .status-cell {
  padding: 16px;
  background: rgba(11, 15, 20, 0.72);
  border-left: 2px solid var(--about-green);
}

.page-about .status-cell .status-label {
  display: block;
  font-size: 12px;
  color: var(--about-gray);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.page-about .status-cell .status-value {
  display: block;
  font-family: var(--font-head);
  font-style: italic;
  font-size: 2rem;
  color: var(--color-text);
  line-height: 1.1;
}

/* 页面目录索引 */
.page-about .about-index {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 56px;
  padding-top: 24px;
  border-top: 1px solid rgba(138, 146, 155, 0.2);
}

.page-about .about-index-item {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 16px;
  border: 1px solid rgba(138, 146, 155, 0.28);
  color: var(--about-gray);
  text-decoration: none;
  font-size: 0.85rem;
  transition: border-color 0.3s ease, color 0.3s ease, background 0.3s ease;
}

.page-about .about-index-item:hover {
  border-color: var(--about-cyan);
  color: var(--color-text);
  background: rgba(0, 229, 255, 0.06);
}

.page-about .about-index-no {
  font-family: var(--font-head);
  font-style: italic;
  color: var(--about-green);
  font-size: 0.9rem;
}

/* ---------- 章节通用 ---------- */
.page-about .about-chapter {
  position: relative;
  padding: 88px 0;
}

.page-about .about-chapter--rail {
  border-top: 1px solid rgba(138, 146, 155, 0.14);
  border-bottom: 1px solid rgba(138, 146, 155, 0.14);
  background: rgba(19, 26, 34, 0.4);
}

.page-about .about-chapter--tech {
  background: linear-gradient(135deg, transparent 0%, rgba(0, 229, 255, 0.04) 50%, transparent 100%);
}

.page-about .chapter {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.page-about .chapter-no {
  font-family: var(--font-head);
  font-style: italic;
  font-size: clamp(4rem, 12vw, 7.5rem);
  line-height: 0.85;
  color: transparent;
  -webkit-text-stroke: 1.5px rgba(200, 255, 0, 0.5);
  text-stroke: 1.5px rgba(200, 255, 0, 0.5);
  display: block;
  margin-bottom: 8px;
  user-select: none;
}

.page-about .chapter-title {
  font-family: var(--font-head);
  font-style: oblique;
  font-size: clamp(2.2rem, 6vw, 4rem);
  line-height: 1.02;
  letter-spacing: -0.025em;
  margin: 0 0 18px;
}

.page-about .chapter-lead {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--about-cyan);
  margin-bottom: 24px;
  font-weight: 500;
}

.page-about .chapter-body p {
  color: rgba(245, 240, 232, 0.88);
  line-height: 1.9;
  margin-bottom: 20px;
}

.page-about .about-img-frame {
  margin: 32px 0 0;
  border: 1px solid rgba(138, 146, 155, 0.22);
  overflow: hidden;
  background: var(--about-dark);
  position: relative;
}

.page-about .about-img-frame::after {
  content: "";
  display: block;
  position: absolute;
  right: 0;
  bottom: 0;
  width: 56px;
  height: 56px;
  border-style: solid;
  border-color: var(--about-cyan);
  border-width: 0 3px 3px 0;
  pointer-events: none;
}

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

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  position: relative;
  margin-top: 40px;
  padding-left: 30px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(to bottom, var(--about-green), var(--about-cyan) 60%, transparent 96%);
}

.page-about .timeline-item {
  position: relative;
  padding-bottom: 36px;
}

.page-about .timeline-item:last-child {
  padding-bottom: 0;
}

.page-about .timeline-dot {
  position: absolute;
  left: -30px;
  top: 8px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--about-green);
  box-shadow: 0 0 16px rgba(200, 255, 0, 0.7);
  border: 2px solid var(--color-bg);
}

.page-about .timeline-card {
  background: var(--about-dark);
  border: 1px solid rgba(138, 146, 155, 0.2);
  padding: 24px;
  position: relative;
  transition: border-color 0.35s ease, box-shadow 0.35s ease;
}

.page-about .timeline-card:hover,
.page-about .timeline-item[data-reveal].is-visible .timeline-card {
  border-color: rgba(200, 255, 0, 0.5);
  box-shadow: 0 0 24px rgba(0, 229, 255, 0.08);
}

.page-about .timeline-year {
  display: inline-block;
  font-family: var(--font-head);
  font-style: italic;
  font-size: 1.25rem;
  color: var(--about-cyan);
  border-bottom: 2px solid var(--about-green);
  padding-bottom: 4px;
  margin-bottom: 12px;
}

.page-about .timeline-card h3 {
  font-family: var(--font-body);
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0 0 10px;
}

.page-about .timeline-card p {
  font-size: 0.95rem;
  color: var(--about-gray) !important;
  line-height: 1.75;
  margin: 0;
}

/* ---------- 技术引擎 ---------- */
.page-about .about-tech-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-about .about-tech-list {
  list-style: none;
  padding: 0;
  margin: 24px 0;
}

.page-about .about-tech-list li {
  position: relative;
  padding-left: 24px;
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 14px;
  color: rgba(245, 240, 232, 0.82);
}

.page-about .about-tech-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  background: var(--about-cyan);
}

.page-about .about-tech-link {
  display: inline-block;
  color: var(--about-green);
  font-weight: 700;
  text-decoration: none;
  border: 1px solid rgba(200, 255, 0, 0.4);
  padding: 10px 20px;
  transition: background 0.3s ease, color 0.3s ease;
}

.page-about .about-tech-link:hover {
  background: var(--about-green);
  color: var(--color-bg);
}

/* ---------- 团队与文化 ---------- */
.page-about .about-team-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-about .about-team-copy p {
  color: rgba(245, 240, 232, 0.88);
  line-height: 1.9;
}

.page-about .about-team-quote {
  margin: 32px 0 0;
  padding: 20px 24px;
  border-left: 4px solid var(--about-green);
  background: rgba(200, 255, 0, 0.06);
  font-family: var(--font-head);
  font-style: italic;
  font-size: 1.15rem;
  line-height: 1.6;
  color: var(--color-text);
}

/* ---------- 规模数据 ---------- */
.page-about .about-metrics {
  padding: 88px 0;
  background: var(--color-bg);
  border-top: 1px solid rgba(138, 146, 155, 0.16);
}

.page-about .about-metrics-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.page-about .about-metric-card {
  background: var(--about-dark);
  border: 1px solid rgba(138, 146, 155, 0.22);
  padding: 32px 20px;
  text-align: center;
  position: relative;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.page-about .about-metric-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
}

.page-about .about-metric-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 24px;
  right: 24px;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--about-green), transparent);
}

.page-about .about-metric-num {
  display: inline-block;
  font-family: var(--font-head);
  font-style: italic;
  font-size: clamp(2.6rem, 7vw, 4rem);
  line-height: 1;
  color: var(--about-green);
}

.page-about .about-metric-unit {
  display: inline-block;
  font-size: 0.95rem;
  color: var(--about-gray);
  margin-left: 4px;
}

.page-about .about-metric-label {
  margin-top: 12px;
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  color: rgba(245, 240, 232, 0.72);
  text-transform: uppercase;
}

/* ---------- CTA ---------- */
.page-about .about-cta {
  padding: 80px 0;
  position: relative;
  overflow: hidden;
  background:
    repeating-linear-gradient(135deg, rgba(200, 255, 0, 0.03) 0, rgba(200, 255, 0, 0.03) 1px, transparent 1px, transparent 14px);
  border-top: 1px solid rgba(138, 146, 155, 0.16);
}

.page-about .about-cta-title {
  font-family: var(--font-head);
  font-style: italic;
  font-size: clamp(1.8rem, 5vw, 3rem);
  margin: 0 0 16px;
}

.page-about .about-cta-desc {
  color: var(--about-gray);
  line-height: 1.8;
  margin-bottom: 32px;
  max-width: 48ch;
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

/* ---------- 显现动画（渐进增强） ---------- */
.page-about [data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.55s var(--ease), transform 0.55s var(--ease);
}

.page-about [data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 桌面端 ---------- */
@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 120px 0 96px;
  }

  .page-about .about-hero-layout {
    grid-template-columns: 1.4fr 0.8fr;
    gap: 64px;
    align-items: center;
  }

  .page-about .chapter {
    grid-template-columns: 140px 1fr;
    gap: 40px;
  }

  .page-about .chapter-no {
    font-size: 7rem;
    margin-top: 4px;
  }

  .page-about .about-chapter {
    padding: 120px 0;
  }

  .page-about .about-timeline {
    padding-left: 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    column-gap: 56px;
  }

  .page-about .about-timeline::before {
    left: 50%;
    transform: translateX(-1px);
  }

  .page-about .timeline-item:nth-child(odd) {
    padding-right: 56px;
    text-align: right;
  }

  .page-about .timeline-item:nth-child(even) {
    padding-left: 56px;
    margin-top: 48px;
  }

  .page-about .timeline-item:nth-child(odd) .timeline-dot {
    left: auto;
    right: -7px;
  }

  .page-about .timeline-item:nth-child(even) .timeline-dot {
    left: -7px;
  }

  .page-about .about-tech-layout {
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
  }

  .page-about .about-team-layout {
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
  }

  .page-about .about-metrics-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
  }

  .page-about .about-metric-card {
    padding: 40px 24px;
  }
}