.page-about {
  --about-body: #C7D4E1;
  background: var(--ink);
  color: var(--white);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 26px 0 44px;
}

.page-about .about-hero-grid {
  display: grid;
  gap: 34px;
  margin-top: 22px;
}

.page-about h1 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(31px, 6.6vw, 58px);
  line-height: 1.12;
  letter-spacing: -0.035em;
  margin: 14px 0 18px;
  max-width: 16ch;
}

.page-about .about-hero-copy .lede {
  max-width: 46ch;
  color: var(--about-body);
}

.page-about .about-hero-meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 20px;
  margin: 30px 0 0;
  padding: 0;
}

.page-about .about-hero-meta > div {
  border-top: 2px solid var(--lime);
  padding-top: 10px;
  min-width: 0;
}

.page-about .about-hero-meta dt {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.page-about .about-hero-meta dd {
  margin: 7px 0 0;
  font-size: 20px;
  font-weight: 700;
  color: var(--white);
  letter-spacing: -0.01em;
}

.page-about .about-hero-visual {
  position: relative;
  aspect-ratio: 4 / 3;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background:
    radial-gradient(circle at 76% 20%, rgba(182, 255, 46, 0.16), transparent 58%),
    var(--panel);
  overflow: hidden;
}

.page-about .about-hero-visual::before {
  content: "";
  position: absolute;
  top: -30%;
  right: -22%;
  width: 58%;
  height: 160%;
  background: linear-gradient(180deg, rgba(255, 122, 26, 0.16), transparent 72%);
  transform: rotate(18deg);
  pointer-events: none;
}

.page-about .about-hero-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

/* ---------- 主体骨架 ---------- */
.page-about .about-shell {
  display: block;
  padding-bottom: 40px;
}

.page-about .about-toc {
  display: none;
}

.page-about .about-flow {
  min-width: 0;
}

/* ---------- 章节 ---------- */
.page-about .about-chapter {
  position: relative;
  padding-top: 10px;
}

.page-about .about-num {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 0.24em;
  color: var(--lime);
  margin: 0 0 8px;
}

.page-about .about-chapter .section-title {
  margin-bottom: 18px;
}

.page-about .about-chapter p {
  font-size: 16.5px;
  line-height: 1.8;
  color: var(--about-body);
  margin: 0 0 18px;
  max-width: 66ch;
}

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

.page-about .about-chapter a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(182, 255, 46, 0.35);
  transition: border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}

.page-about .about-chapter a:hover {
  color: var(--white);
  border-bottom-color: var(--white);
}

.page-about .about-serif {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(19px, 2.6vw, 25px);
  line-height: 1.55;
  color: var(--paper);
  border-left: 3px solid var(--clay);
  padding-left: 18px;
  margin: 0 0 26px;
  max-width: 46ch;
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 30px 0 0;
  border-radius: var(--r-lg);
  overflow: hidden;
}

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

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 30px 0 0;
  padding: 0 0 0 26px;
  position: relative;
  display: grid;
  gap: 12px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--lime), var(--line) 72%);
}

.page-about .about-timeline > li {
  position: relative;
}

.page-about .tl-item {
  position: relative;
}

.page-about .tl-sum {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  list-style: none;
  cursor: pointer;
  padding: 14px 18px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  transition: border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}

.page-about .tl-sum::-webkit-details-marker {
  display: none;
}

.page-about .tl-sum::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 50%;
  width: 14px;
  height: 14px;
  margin-top: -7px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--lime);
  box-shadow: 0 0 0 4px var(--ink);
  transition: background var(--t-fast) var(--ease);
}

.page-about details[open] > .tl-sum::before {
  background: var(--lime);
}

.page-about .tl-sum:hover {
  border-color: var(--moss);
  background: #182130;
}

.page-about .tl-era {
  flex: 0 0 auto;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--orange);
}

.page-about .tl-head {
  flex: 1 1 auto;
  font-size: 16px;
  font-weight: 700;
  color: var(--white);
}

.page-about .tl-cue {
  flex: 0 0 auto;
  margin-left: auto;
  font-size: 18px;
  line-height: 1;
  color: var(--muted);
  transition: transform var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}

.page-about details[open] .tl-cue {
  transform: rotate(90deg);
  color: var(--lime);
}

.page-about .tl-body {
  padding: 14px 18px 4px;
  border-left: 2px solid var(--line);
  margin-left: 12px;
}

.page-about .tl-body p {
  font-size: 15.5px;
  margin-bottom: 12px;
}

/* ---------- 团队卡片 ---------- */
.page-about .about-team-grid {
  margin-top: 28px;
  gap: 16px;
}

.page-about .about-team-card {
  padding: 22px 20px;
  min-width: 0;
  transition: transform var(--t-mid) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-about .about-team-card:hover {
  transform: translateY(-4px);
  border-color: var(--moss);
}

.page-about .about-team-num {
  display: block;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--moss);
  margin: 0 0 10px;
}

.page-about .about-team-card .card-title {
  margin: 0 0 10px;
}

.page-about .about-team-card p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--about-body);
  margin: 0;
}

/* ---------- 价值观 ---------- */
.page-about .about-values {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-value {
  position: relative;
  padding: 20px 22px 20px 24px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .about-value::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--orange);
}

.page-about .about-value:nth-child(2)::before {
  background: var(--lime);
}

.page-about .about-value:nth-child(3)::before {
  background: var(--moss);
}

.page-about .about-value-key {
  font-size: 17px;
  font-weight: 700;
  color: var(--white);
  margin: 0 0 10px;
  letter-spacing: -0.01em;
}

.page-about .about-value-text {
  font-size: 15.5px;
  margin: 0;
}

/* ---------- 数据面板 ---------- */
.page-about .about-panel {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 26px 0 26px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.page-about .about-panel-item {
  background: var(--panel);
  padding: 20px 18px;
  min-width: 0;
}

.page-about .about-panel-item .stat-value {
  font-size: clamp(22px, 4.4vw, 30px);
  font-weight: 700;
  color: var(--lime);
  margin: 0 0 6px;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.page-about .about-panel-item:nth-child(2n) .stat-value {
  color: var(--orange);
}

.page-about .about-panel-item .stat-label {
  font-size: 13px;
  color: var(--muted);
  margin: 0;
  line-height: 1.4;
}

/* ---------- 收尾行动区 ---------- */
.page-about .about-cta {
  margin-top: 32px;
  padding: 26px 24px;
  border-radius: var(--r-lg);
  background: var(--paper);
  color: var(--ink);
  position: relative;
  overflow: hidden;
}

.page-about .about-cta::after {
  content: "";
  position: absolute;
  right: -40px;
  top: -60px;
  width: 180px;
  height: 220px;
  background: rgba(182, 255, 46, 0.55);
  transform: rotate(22deg);
  pointer-events: none;
}

.page-about .about-cta-text {
  position: relative;
  z-index: 1;
  font-family: var(--font-serif);
  font-size: clamp(18px, 2.4vw, 22px);
  line-height: 1.5;
  margin: 0 0 20px;
  max-width: 34ch;
  color: var(--ink);
}

.page-about .about-cta-row {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .about-hero-meta {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-panel {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-cta {
    padding: 34px 34px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 34px 0 60px;
  }

  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: center;
    gap: 52px;
  }
}

@media (min-width: 1000px) {
  .page-about .about-shell {
    display: grid;
    grid-template-columns: 194px minmax(0, 1fr);
    gap: 62px;
    align-items: start;
    padding-bottom: 72px;
  }

  .page-about .about-toc {
    display: block;
    position: sticky;
    top: 92px;
    padding-top: 14px;
  }

  .page-about .about-panel {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-about .about-panel-item {
    padding: 24px 16px;
  }
}

/* 目录 */
.page-about .about-toc-label {
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--muted);
  margin: 0 0 14px;
}

.page-about .about-toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .toc-link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 12px;
  border-left: 2px solid transparent;
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.45;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}

.page-about .toc-link .mono {
  font-size: 11px;
  opacity: 0.85;
}

.page-about .toc-link:hover,
.page-about .toc-link.is-current {
  color: var(--white);
  border-left-color: var(--lime);
  background: rgba(182, 255, 46, 0.07);
}

.page-about .about-chapter.is-current::before {
  content: "";
  position: absolute;
  left: -18px;
  top: 16px;
  bottom: 16px;
  width: 2px;
  background: var(--lime);
  border-radius: var(--r-pill);
}

@media (min-width: 1000px) {
  .page-about .about-chapter.is-current::before {
    left: -22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-team-card,
  .page-about .tl-cue,
  .page-about .tl-sum,
  .page-about .toc-link {
    transition: none;
  }

  .page-about .about-team-card:hover {
    transform: none;
  }
}
<<<END>>>