.page-about {
  --about-flow-gap: clamp(44px, 7vw, 84px);
  background: var(--ink-900);
  color: var(--white);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 4vw, 40px) 0 clamp(34px, 6vw, 72px);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(43, 59, 87, 0.55) 1px, transparent 1px),
    linear-gradient(90deg, rgba(43, 59, 87, 0.55) 1px, transparent 1px);
  background-size: 84px 84px;
  opacity: 0.26;
  pointer-events: none;
}

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

.page-about .about-hero h1 {
  margin: 16px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 7.4vw, 62px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  max-width: 17ch;
}

.page-about .about-hero .lede {
  margin-top: 18px;
  max-width: 46ch;
  color: rgba(245, 248, 246, 0.82);
}

.page-about .hero-figure {
  margin: 30px 0 0;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--ink-800);
}

.page-about .hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
}

.page-about .hero-stats {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.page-about .hero-stat {
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 14px 16px 16px;
  min-width: 0;
}

.page-about .hero-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(24px, 4.4vw, 36px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--orange);
}

.page-about .hero-stat__label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.55;
  color: var(--muted);
}

@media (min-width: 720px) {
  .page-about .hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
  }
}

/* ---------- 主体框架 ---------- */
.page-about .about-body {
  display: grid;
  gap: clamp(26px, 5vw, 54px);
  padding-top: clamp(32px, 5vw, 64px);
  padding-bottom: clamp(48px, 8vw, 96px);
}

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

.page-about .about-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-toc__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .about-toc__link {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  align-items: baseline;
  gap: 6px;
  padding: 9px 0 9px 10px;
  border-left: 2px solid var(--line);
  color: var(--muted);
  text-decoration: none;
  font-size: 13px;
  line-height: 1.45;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible {
  color: var(--white);
  border-left-color: var(--green-bright);
}

.page-about .about-toc__link[aria-current="true"] {
  color: var(--white);
  border-left-color: var(--orange);
}

.page-about .about-toc__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--green-bright);
}

.page-about .about-flow {
  display: grid;
  gap: var(--about-flow-gap);
  min-width: 0;
}

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

@media (min-width: 1080px) {
  .page-about .about-body {
    grid-template-columns: 200px minmax(0, 1fr);
    column-gap: clamp(32px, 4vw, 72px);
  }

  .page-about .about-toc {
    display: block;
    align-self: start;
    position: sticky;
    top: 104px;
  }
}

/* ---------- 章节文字 ---------- */
.page-about .about-section > .eyebrow {
  margin: 0 0 12px;
}

.page-about .about-section h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 4.4vw, 42px);
  line-height: 1.07;
  letter-spacing: -0.015em;
  max-width: 22ch;
}

.page-about .about-section > p {
  margin: 14px 0 0;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.75;
  color: rgba(245, 248, 246, 0.84);
}

.page-about .about-section h3 {
  margin: 28px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 2.6vw, 24px);
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.page-about .about-standfirst {
  font-size: 17px !important;
  color: rgba(245, 248, 246, 0.72) !important;
  max-width: 34ch !important;
}

/* ---------- 档案卷便签 ---------- */
.page-about .archive-slip {
  margin: 28px 0 0;
  max-width: 560px;
  padding: 18px 20px 20px;
  border-left: 3px solid var(--green);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  background: var(--ink-800);
}

.page-about .archive-slip__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--green-bright);
}

.page-about .archive-slip__text {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 团队矩阵 ---------- */
.page-about .team-grid {
  display: grid;
  gap: 14px;
  margin-top: 26px;
}

.page-about .team-card {
  position: relative;
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-top: 3px solid var(--green);
  border-radius: var(--r-lg);
  padding: 22px 20px 24px;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .team-card:hover {
  transform: translateY(-4px);
  border-color: rgba(53, 208, 127, 0.6);
  border-top-color: var(--green-bright);
}

.page-about .team-card__idx {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--green-bright);
}

.page-about .team-card h3 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
}

.page-about .team-card p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.72;
  color: rgba(245, 248, 246, 0.78);
}

@media (min-width: 780px) {
  .page-about .team-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }
}

/* ---------- 数据来源 ---------- */
.page-about .source-figure {
  margin: 28px 0 0;
}

.page-about .source-notes {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
  max-width: 640px;
}

.page-about .source-notes li {
  position: relative;
  padding: 13px 0 13px 20px;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.72;
  color: var(--muted);
}

.page-about .source-notes li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 21px;
  width: 9px;
  height: 2px;
  background: var(--green-bright);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  list-style: none;
  position: relative;
  margin: 30px 0 0;
  padding: 0 0 0 2px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--line);
}

.page-about .tl-node {
  position: relative;
  padding: 0 0 28px 36px;
}

.page-about .tl-node:last-child {
  padding-bottom: 0;
}

.page-about .tl-node::before {
  content: "";
  position: absolute;
  left: 1px;
  top: 5px;
  width: 16px;
  height: 16px;
  box-sizing: border-box;
  border-radius: 50%;
  background: var(--ink-900);
  border: 3px solid var(--green);
}

.page-about .tl-node--now::before {
  border-color: var(--orange);
  box-shadow: 0 0 0 5px rgba(255, 107, 26, 0.16);
}

.page-about .tl-node__year {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(20px, 3.4vw, 28px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--green-bright);
}

.page-about .tl-node--now .tl-node__year {
  color: var(--orange);
}

.page-about .tl-node__body h3 {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(18px, 2.4vw, 22px);
  line-height: 1.3;
}

.page-about .tl-node__body p {
  margin: 8px 0 0;
  max-width: 54ch;
  font-size: 15px;
  line-height: 1.72;
  color: rgba(245, 248, 246, 0.76);
}

/* ---------- 版图对照 ---------- */
.page-about .about-contrast {
  display: grid;
  gap: 12px;
  margin-top: 34px;
}

.page-about .about-contrast__col {
  min-width: 0;
  padding: 20px 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--ink-800);
}

.page-about .about-contrast__col--now {
  background: var(--ink-700);
  border-color: rgba(23, 164, 90, 0.5);
}

.page-about .about-contrast__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.page-about .about-contrast__col--now .about-contrast__label {
  color: var(--green-bright);
}

.page-about .about-contrast__list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
}

.page-about .about-contrast__list li {
  position: relative;
  padding: 8px 0 8px 16px;
  font-size: 14px;
  line-height: 1.65;
  color: rgba(245, 248, 246, 0.84);
}

.page-about .about-contrast__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 17px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--line);
}

.page-about .about-contrast__col--now .about-contrast__list li::before {
  background: var(--green-bright);
}

@media (min-width: 760px) {
  .page-about .about-contrast {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr);
    gap: 14px;
  }
}

/* ---------- 服务对象 ---------- */
.page-about .audience-figure {
  margin: 26px 0 0;
}

.page-about .audience-grid {
  display: grid;
  gap: 14px;
  margin-top: 26px;
}

.page-about .audience-card {
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 20px 20px 24px;
}

.page-about .audience-card > .chip {
  display: inline-flex;
}

.page-about .audience-card h3 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  line-height: 1.3;
}

.page-about .audience-card p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.72;
  color: rgba(245, 248, 246, 0.78);
}

@media (min-width: 780px) {
  .page-about .audience-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }
}

/* ---------- 收束 ---------- */
.page-about .about-outro {
  border-top: 1px solid var(--line);
  padding-top: clamp(28px, 4vw, 44px);
}

.page-about .about-outro .btn-row {
  margin-top: 24px;
}

/* ---------- 动效收敛 ---------- */
.page-about [data-reveal] {
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal],
  .page-about .team-card,
  .page-about .about-toc__link {
    transition: none;
  }

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