.page-about {
  --about-line-x: 5px;
  --about-stage-pad: clamp(38px, 6vw, 76px);
  color: var(--mist);
  font-family: var(--font-sans);
  padding-bottom: clamp(56px, 9vw, 120px);
}

.page-about .about-wrap {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(22px, 4vw, 40px) 0 clamp(28px, 5vw, 52px);
  border-bottom: 1px solid var(--moss);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -150px;
  right: -130px;
  width: clamp(220px, 42vw, 460px);
  height: clamp(220px, 42vw, 460px);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(63, 227, 200, 0.16), transparent 70%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: -80px;
  bottom: -120px;
  width: clamp(180px, 32vw, 340px);
  height: clamp(180px, 32vw, 340px);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(200, 255, 63, 0.12), transparent 72%);
  pointer-events: none;
}

.page-about .breadcrumb {
  position: relative;
  z-index: 1;
  margin-bottom: clamp(22px, 4vw, 36px);
}

.page-about .hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  align-items: end;
}

.page-about .hero-kicker {
  display: inline-block;
  margin: 0 0 18px;
  padding: 6px 14px;
  border: 1px solid rgba(200, 255, 63, 0.28);
  border-radius: 999px;
  background: rgba(200, 255, 63, 0.08);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--lime);
}

.page-about .about-hero h1 {
  margin: 0 0 20px;
  max-width: 22ch;
  font-size: clamp(30px, 5.6vw, 58px);
  line-height: 1.14;
  font-weight: 700;
  letter-spacing: -0.012em;
  color: var(--mist);
}

.page-about .about-hero .lede {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: rgba(233, 245, 239, 0.84);
}

.page-about .hero-side {
  padding-left: 16px;
  border-left: 1px solid var(--moss);
}

.page-about .hero-side__note {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  line-height: 1.7;
  color: var(--sage);
}

/* ---------- 关键数字 ---------- */
.page-about .about-stats {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(28px, 4vw, 44px);
  border: 1px solid var(--moss);
  border-radius: var(--radius);
  background: var(--moss);
  overflow: hidden;
}

.page-about .stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 16px;
  background: var(--block-2);
}

.page-about .stat__value {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.6vw, 36px);
  font-weight: 500;
  line-height: 1.1;
  color: var(--amber);
}

.page-about .stat__label {
  font-size: 12px;
  letter-spacing: 0.06em;
  line-height: 1.6;
  color: var(--sage);
}

/* ---------- 纵向刻度主干 ---------- */
.page-about .about-flow {
  position: relative;
  margin-top: clamp(8px, 2vw, 16px);
}

.page-about .about-flow::before {
  content: "";
  position: absolute;
  left: var(--about-line-x);
  top: 0;
  bottom: 40px;
  width: 1px;
  background: linear-gradient(180deg, var(--moss) 0%, var(--moss) 90%, transparent 100%);
}

.page-about .about-stage {
  position: relative;
  padding: var(--about-stage-pad) 0 0 28px;
}

.page-about .about-stage::before {
  content: "";
  position: absolute;
  left: 0;
  top: calc(var(--about-stage-pad) + 9px);
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--night);
  border: 2px solid var(--lime);
  box-shadow: 0 0 0 3px rgba(200, 255, 63, 0.12);
}

.page-about .stage-head {
  margin-bottom: clamp(20px, 3vw, 30px);
}

.page-about .stage-head .tag {
  margin-bottom: 14px;
}

.page-about .stage-head .h2 {
  margin: 0 0 14px;
  max-width: 24ch;
  color: var(--mist);
}

.page-about .stage-head .lede {
  margin: 0;
  max-width: 64ch;
  color: rgba(233, 245, 239, 0.84);
}

.page-about .prose p {
  margin: 0 0 16px;
  max-width: 70ch;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(233, 245, 239, 0.8);
  overflow-wrap: break-word;
}

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

.page-about .prose a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(63, 227, 200, 0.4);
}

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

.page-about .note {
  margin: 22px 0 0;
  max-width: 72ch;
  font-size: 13px;
  line-height: 1.8;
  color: var(--sage);
}

.page-about .note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(63, 227, 200, 0.4);
}

/* ---------- 履历组织 ---------- */
.page-about .resume-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 34px);
  margin-bottom: clamp(22px, 3vw, 32px);
}

.page-about .resume-copy p {
  margin: 0 0 16px;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(233, 245, 239, 0.82);
}

.page-about .resume-figure {
  margin: 0;
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--moss);
  background: var(--block-2);
}

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

.page-about .resume-figure img {
  aspect-ratio: 14 / 9;
}

.page-about .media__caption {
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  line-height: 1.6;
  color: var(--sage);
  background: var(--block-2);
  border-top: 1px solid var(--moss);
}

.page-about .field-card {
  border: 1px solid var(--moss);
  border-radius: var(--radius);
  background: var(--block);
  padding: clamp(18px, 3vw, 28px);
}

.page-about .field-card__title {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--lime);
}

.page-about .field-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--moss);
  border: 1px solid var(--moss);
  border-radius: 12px;
  overflow: hidden;
}

.page-about .field-list li {
  display: grid;
  grid-template-columns: minmax(84px, 110px) minmax(0, 1fr);
  gap: 14px;
  padding: 14px 16px;
  background: var(--block-2);
}

.page-about .field-key {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

.page-about .field-val {
  font-size: 14px;
  line-height: 1.75;
  color: rgba(233, 245, 239, 0.82);
}

/* ---------- 团队与审核 ---------- */
.page-about .filter-bar {
  margin-bottom: clamp(18px, 3vw, 26px);
}

.page-about .team-grid {
  margin-bottom: clamp(24px, 3.5vw, 34px);
}

.page-about .team-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  border-left: 3px solid var(--moss);
}

.page-about .team-card[data-filter-item="collect"] {
  border-left-color: var(--cyan);
}

.page-about .team-card[data-filter-item="verify"] {
  border-left-color: var(--amber);
}

.page-about .team-card[data-filter-item="publish"] {
  border-left-color: var(--whistle);
}

.page-about .team-card h3 {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--mist);
}

.page-about .team-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: rgba(233, 245, 239, 0.76);
}

.page-about .team-figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--moss);
  background: var(--block-2);
}

.page-about .team-figure img {
  aspect-ratio: 3 / 2;
}

/* ---------- 版本沿革时间轴 ---------- */
.page-about .timeline-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 36px);
}

.page-about .timeline-figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--moss);
  background: var(--block-2);
}

.page-about .timeline-figure img {
  aspect-ratio: 3 / 4;
}

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

.page-about .tl-item {
  display: grid;
  grid-template-columns: 74px minmax(0, 1fr);
  gap: 16px;
  padding: 20px 0;
  border-top: 1px dashed var(--moss);
}

.page-about .tl-item:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .tl-year {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.02em;
  line-height: 1.5;
  color: var(--lime);
}

.page-about .tl-title {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--mist);
}

.page-about .tl-body > p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(233, 245, 239, 0.76);
}

.page-about .tl-more {
  margin-top: 12px;
  border-top: 1px solid var(--moss);
}

.page-about .tl-more summary {
  display: inline-block;
  padding: 10px 0 4px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

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

.page-about .tl-more summary::after {
  content: " +";
  color: var(--sage);
}

.page-about .tl-more[open] summary::after {
  content: " −";
}

.page-about .tl-more summary:hover,
.page-about .tl-more summary:focus-visible {
  color: var(--lime);
}

.page-about .tl-more ul {
  margin: 4px 0 6px;
  padding: 0 0 0 18px;
  list-style: none;
}

.page-about .tl-more li {
  position: relative;
  padding: 5px 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--sage);
}

.page-about .tl-more li::before {
  content: "";
  position: absolute;
  left: -14px;
  top: 14px;
  width: 6px;
  height: 1px;
  background: var(--moss);
}

/* ---------- 内容协作 ---------- */
.page-about .partner-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .partner-card {
  position: relative;
  padding: clamp(18px, 3vw, 26px);
  border-radius: var(--radius);
  background: linear-gradient(160deg, var(--block) 0%, var(--block-2) 100%);
  border: 1px solid var(--moss);
  overflow: hidden;
}

.page-about .partner-card__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(30px, 4.4vw, 44px);
  font-weight: 500;
  line-height: 1;
  color: rgba(200, 255, 63, 0.72);
  margin-bottom: 12px;
}

.page-about .partner-card h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  color: var(--mist);
}

.page-about .partner-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: rgba(233, 245, 239, 0.76);
}

/* ---------- 对接方式 ---------- */
.page-about .route-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .route-card {
  padding: clamp(18px, 3vw, 26px);
  border-radius: var(--radius);
  background: var(--block-2);
  border: 1px solid var(--moss);
  border-top: 3px solid var(--cyan);
}

.page-about .route-card:nth-child(2) {
  border-top-color: var(--amber);
}

.page-about .route-card:nth-child(3) {
  border-top-color: var(--whistle);
}

.page-about .route-card h3 {
  margin: 14px 0 8px;
  font-size: 16px;
  font-weight: 700;
  color: var(--mist);
}

.page-about .route-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: rgba(233, 245, 239, 0.76);
}

.page-about .cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 32px);
}

/* ---------- 响应式 ---------- */
@media (max-width: 479px) {
  .page-about .field-list li {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

  .page-about .tl-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
  }

  .page-about .tl-year {
    font-size: 13px;
    letter-spacing: 0.12em;
  }
}

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

  .page-about .stat {
    padding: 22px 20px;
  }

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

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

@media (min-width: 900px) {
  .page-about .hero-grid {
    grid-template-columns: minmax(0, 1fr) 150px;
    gap: 40px;
  }

  .page-about .hero-side {
    justify-self: end;
    align-self: end;
    border-left: 0;
    border-right: 1px solid var(--moss);
    padding: 0 18px 0 0;
    writing-mode: vertical-rl;
    max-height: 300px;
  }

  .page-about .about-stage {
    padding-left: 56px;
  }

  .page-about .resume-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }

  .page-about .timeline-layout {
    grid-template-columns: 240px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .timeline-figure {
    position: sticky;
    top: 72px;
  }

  .page-about .tl-item {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 22px;
    padding: 24px 0;
  }

  .page-about .tl-year {
    font-size: 17px;
  }
}

@media (min-width: 1120px) {
  .page-about .about-flow::before {
    left: var(--about-line-x);
  }

  .page-about .about-stage {
    padding-left: 68px;
  }
}