.page-about {
  background: var(--tea-lite);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about .crumb-sep {
  display: inline-block;
  width: 5px;
  height: 5px;
  margin: 0 10px;
  background: var(--orange);
  vertical-align: middle;
}

/* ============ 首屏 ============ */
.page-about .about-hero {
  padding-top: 12px;
  padding-bottom: 56px;
}

.page-about .about-hero-grid {
  display: grid;
  gap: 40px;
  align-items: start;
}

.page-about .kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--blue-mid);
  margin: 0 0 20px;
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 6.4vw, 74px);
  line-height: 1.08;
  letter-spacing: -.01em;
  color: var(--blue);
  margin: 0 0 24px;
  max-width: 15em;
}

.page-about .about-lead {
  font-size: 17px;
  line-height: 1.9;
  color: var(--ink);
  max-width: 36em;
  margin: 0 0 18px;
}

.page-about .about-note {
  font-size: 15px;
  line-height: 1.85;
  color: var(--blue-mid);
  max-width: 34em;
  margin: 0 0 28px;
  padding-left: 16px;
  border-left: 2px solid var(--tea);
}

.page-about .about-hero-signal {
  position: relative;
  background: var(--white);
  border: 1px solid var(--line-blue);
  padding: 26px 22px 12px;
}

.page-about .signal-ring {
  position: relative;
  width: 74px;
  height: 74px;
  margin-bottom: 18px;
}

.page-about .signal-ring i {
  position: absolute;
  inset: 0;
  border: 1px solid var(--orange);
  border-radius: 50%;
  animation: about-ripple 6s linear infinite;
}

.page-about .signal-ring i:nth-child(2) { animation-delay: 2s; }
.page-about .signal-ring i:nth-child(3) { animation-delay: 4s; }

.page-about .signal-ring span {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 9px;
  height: 9px;
  margin: -4.5px 0 0 -4.5px;
  background: var(--grass);
  border-radius: 50%;
}

@keyframes about-ripple {
  0%   { transform: scale(.22); opacity: .95; }
  100% { transform: scale(1);   opacity: 0; }
}

.page-about .about-facts {
  margin: 0;
  display: block;
}

.page-about .fact-row {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 14px;
  padding: 13px 0;
  border-top: 1px solid var(--line-blue);
}

.page-about .fact-row dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--blue-mid);
  padding-top: 3px;
}

.page-about .fact-row dd {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  line-height: 1.5;
  color: var(--blue);
}

/* ============ 章节骨架 ============ */
.page-about .chapter {
  display: block;
}

.page-about .chapter-no {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(38px, 9vw, 68px);
  line-height: 1;
  color: var(--blue);
  opacity: .22;
  margin: 0 0 14px;
}

.page-about .section-blue .chapter-no {
  color: var(--white);
  opacity: .3;
}

.page-about .chapter-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.6vw, 40px);
  line-height: 1.2;
  color: var(--blue);
  margin: 0 0 14px;
}

.page-about .side-note {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--blue-mid);
  margin: 0 0 22px;
}

.page-about .section-head {
  margin-bottom: 6px;
}

.page-about .chapter-text {
  font-size: 17px;
  line-height: 1.9;
  color: var(--ink);
  max-width: 36em;
  margin: 0 0 8px;
}

.page-about .section-blue .chapter-title {
  color: var(--white);
}

.page-about .section-blue .chapter-text,
.page-about .section-blue .side-note {
  color: rgba(255, 255, 255, .82);
}

.page-about .figure {
  margin: 0;
  overflow: hidden;
  background: var(--tea);
}

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

.page-about .figure-caption {
  font-size: 13px;
  line-height: 1.7;
  color: var(--blue-mid);
  padding: 12px 0 0;
}

.page-about .section-blue .figure-caption {
  color: rgba(255, 255, 255, .68);
}

/* ============ 01 四件事 ============ */
.page-about .about-services {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  border-top: 1px solid var(--line-blue);
}

.page-about .about-services li {
  display: grid;
  gap: 8px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line-blue);
}

.page-about .about-services h3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  color: var(--blue);
  margin: 0;
}

.page-about .about-services h3::before {
  content: "";
  display: inline-block;
  width: 16px;
  height: 2px;
  background: var(--orange);
  vertical-align: middle;
  margin-right: 10px;
}

.page-about .about-services p {
  margin: 0;
  font-size: 16px;
  line-height: 1.9;
  max-width: 42em;
}

/* ============ 02 时间线 ============ */
.page-about .about-timeline {
  list-style: none;
  margin: 30px 0 0;
  padding: 0 0 0 26px;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: var(--line-blue);
}

.page-about .tl-item {
  position: relative;
  padding-bottom: 40px;
}

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

.page-about .tl-dot {
  position: absolute;
  left: -26px;
  top: 5px;
  width: 11px;
  height: 11px;
  background: var(--orange);
  border-radius: 50%;
  animation: about-pulse 3.2s var(--ease) infinite;
}

@keyframes about-pulse {
  0%   { box-shadow: 0 0 0 0 rgba(255, 122, 47, .45); }
  70%  { box-shadow: 0 0 0 10px rgba(255, 122, 47, 0); }
  100% { box-shadow: 0 0 0 0 rgba(255, 122, 47, 0); }
}

.page-about .tl-era {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--blue-mid);
  margin: 0 0 10px;
}

.page-about .tl-era::before {
  content: "";
  display: inline-block;
  width: 14px;
  height: 2px;
  background: var(--orange);
  vertical-align: middle;
  margin-right: 10px;
}

.page-about .tl-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 21px;
  line-height: 1.35;
  color: var(--blue);
  margin: 0 0 10px;
}

.page-about .tl-text {
  font-size: 16px;
  line-height: 1.9;
  margin: 0;
  max-width: 40em;
}

.page-about .tl-figure {
  margin-top: 20px;
  max-width: 640px;
}

/* ============ 03 团队 ============ */
.page-about .team-figure {
  margin-top: 26px;
}

.page-about .team-folds {
  margin-top: 32px;
  border-top: 1px solid var(--line-blue);
}

.page-about .fold {
  border-bottom: 1px solid var(--line-blue);
}

.page-about .fold-heading {
  margin: 0;
}

.page-about .fold-head {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 20px 0;
  background: transparent;
  border: 0;
  text-align: left;
  cursor: pointer;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  line-height: 1.4;
  color: var(--blue);
  transition: color var(--t-fast) var(--ease);
}

.page-about .fold-head:hover,
.page-about .fold-head:focus-visible {
  color: var(--blue-mid);
}

.page-about .fold-mark {
  flex: none;
  width: 10px;
  height: 10px;
  border-right: 2px solid var(--orange);
  border-bottom: 2px solid var(--orange);
  transform: rotate(45deg);
  transition: transform var(--t-fast) var(--ease);
}

.page-about .fold-head[aria-expanded="true"] .fold-mark {
  transform: rotate(-135deg);
}

.page-about .fold-body {
  overflow: hidden;
}

.page-about .fold-inner {
  padding: 2px 0 24px;
  max-width: 42em;
}

.page-about .fold-inner p {
  font-size: 16px;
  line-height: 1.9;
  margin: 0 0 10px;
}

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

.page-about .fold-inner a {
  color: var(--blue-mid);
  text-decoration: underline;
  text-decoration-color: var(--orange);
  text-underline-offset: 4px;
  transition: color var(--t-fast) var(--ease);
}

.page-about .fold-inner a:hover {
  color: var(--blue);
}

/* ============ 04 覆盖 ============ */
.page-about .node-map {
  margin-top: 30px;
}

.page-about .node-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  max-width: 460px;
}

.page-about .node-dot {
  position: relative;
  aspect-ratio: 1 / 1;
  border: 1px solid var(--line-white);
}

.page-about .node-dot::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 7px;
  height: 7px;
  margin: -3.5px 0 0 -3.5px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .7);
}

.page-about .node-dot.is-local::after {
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 122, 47, .22);
}

.page-about .node-legend {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
}

.page-about .node-legend li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(255, 255, 255, .84);
  margin-bottom: 8px;
}

.page-about .legend-mark {
  flex: none;
  width: 9px;
  height: 9px;
  margin-top: 9px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .7);
}

.page-about .legend-mark.legend-local {
  background: var(--orange);
}

.page-about .cover-figure {
  margin-top: 34px;
  border: 1px solid var(--line-white);
}

/* ============ 05 合作与认可 ============ */
.page-about .award-list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  border-top: 1px solid var(--line-blue);
}

.page-about .award-list li {
  padding: 24px 0;
  border-bottom: 1px solid var(--line-blue);
}

.page-about .award-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  color: var(--blue);
  margin: 0 0 8px;
}

.page-about .award-title::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--orange);
  vertical-align: middle;
  margin-right: 12px;
}

.page-about .award-desc {
  font-size: 16px;
  line-height: 1.9;
  margin: 0;
  max-width: 42em;
}

/* ============ 06 熟悉感 ============ */
.page-about .habit-list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
}

.page-about .habit-list li {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 16px;
  padding: 22px 0;
  border-top: 1px solid var(--line-blue);
}

.page-about .habit-list li:last-child {
  border-bottom: 1px solid var(--line-blue);
}

.page-about .habit-idx {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 14px;
  color: var(--blue-mid);
  padding-top: 4px;
}

.page-about .habit-list h3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  color: var(--blue);
  margin: 0 0 8px;
}

.page-about .habit-list p {
  font-size: 16px;
  line-height: 1.9;
  margin: 0;
  max-width: 42em;
}

.page-about .next-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  margin-top: 36px;
  padding-top: 26px;
  border-top: 2px solid var(--blue);
}

.page-about .next-links a {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  color: var(--blue);
  text-decoration: none;
  padding-bottom: 3px;
  border-bottom: 2px solid var(--orange);
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-about .next-links a:hover {
  color: var(--blue-mid);
  border-color: var(--blue-mid);
}

/* ============ 断点 ============ */
@media (min-width: 640px) {
  .page-about .node-grid {
    grid-template-columns: repeat(6, 1fr);
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding-top: 20px;
    padding-bottom: 88px;
  }

  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, .85fr);
    gap: clamp(40px, 7vw, 100px);
  }

  .page-about .chapter {
    display: grid;
    grid-template-columns: 128px minmax(0, 1fr);
    gap: clamp(28px, 4vw, 60px);
    align-items: start;
  }

  .page-about .chapter-no {
    margin-bottom: 0;
    position: sticky;
    top: 96px;
  }

  .page-about .about-services li {
    grid-template-columns: 180px minmax(0, 1fr);
    gap: 32px;
    align-items: baseline;
  }

  .page-about .about-timeline {
    padding-left: 34px;
  }

  .page-about .tl-dot {
    left: -34px;
  }

  .page-about .team-figure,
  .page-about .cover-figure {
    margin-top: 36px;
  }

  .page-about .award-list li {
    display: grid;
    grid-template-columns: 300px minmax(0, 1fr);
    gap: 36px;
    align-items: baseline;
  }

  .page-about .award-title {
    margin-bottom: 0;
  }
}

@media (min-width: 1100px) {
  .page-about .habit-list li {
    grid-template-columns: 30px minmax(0, 1fr);
    gap: 24px;
  }
}
<<<END>>>