.page-about {
  --about-line: rgba(53, 224, 214, 0.16);
  --about-body: rgba(242, 237, 228, 0.82);
  --about-body-soft: rgba(242, 237, 228, 0.72);
  background: var(--ink);
  color: var(--paper);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-mast {
  position: relative;
  padding: 22px 0 52px;
}

.page-about .about-mast::before {
  content: "";
  position: absolute;
  top: -180px;
  right: -140px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(53, 224, 214, 0.18), transparent 68%);
  pointer-events: none;
}

.page-about .about-mast__inner {
  position: relative;
}

.page-about .about-breadcrumb,
.page-about .breadcrumb__list {
  margin-bottom: 20px;
}

.page-about .about-mast__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-mast__title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.75rem, 5.8vw, 3.2rem);
  line-height: 1.2;
  letter-spacing: 0.005em;
  margin: 14px 0 18px;
  max-width: 16em;
  color: var(--paper);
}

.page-about .about-mast__lead {
  font-size: 1rem;
  line-height: 1.85;
  color: var(--about-body);
  max-width: 60ch;
  margin: 0 0 32px;
}

.page-about .about-mast__cols {
  display: grid;
  gap: 22px;
  border-top: 1px solid var(--about-line);
  padding-top: 26px;
}

.page-about .about-mast__sub {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--mist);
  margin: 0 0 8px;
}

.page-about .about-mast__col p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--about-body-soft);
}

/* ---------- 通用章节 ---------- */
.page-about .about-chapter {
  position: relative;
  padding: 46px 0;
  border-top: 1px solid var(--about-line);
}

.page-about .about-chapter__head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 22px;
}

.page-about .about-chapter__num {
  flex: 0 0 auto;
  font-family: var(--font-display);
  font-size: 50px;
  font-weight: 800;
  line-height: 0.82;
  letter-spacing: -0.03em;
  color: var(--cyan);
  opacity: 0.55;
}

.page-about .about-chapter__title {
  font-family: var(--font-serif);
  font-size: clamp(1.3rem, 3.8vw, 1.95rem);
  font-weight: 700;
  line-height: 1.32;
  margin: 6px 0 0;
  color: var(--paper);
}

.page-about .about-chapter__body p {
  max-width: 68ch;
  margin: 0 0 16px;
  font-size: 0.96rem;
  line-height: 1.85;
  color: var(--about-body);
}

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

.page-about .about-chapter__intro {
  max-width: 62ch;
  margin: 0;
  font-size: 0.96rem;
  line-height: 1.8;
  color: var(--about-body-soft);
}

.page-about .about-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 224, 214, 0.45);
  padding-bottom: 1px;
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--mist);
  border-bottom-color: var(--mist);
}

/* ---------- 数据条 ---------- */
.page-about .about-facts {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 28px 0 0;
  padding: 0;
  background: var(--about-line);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .about-facts__item {
  background: var(--ink-2);
  padding: 18px 16px;
}

.page-about .about-facts__value {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.42rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--lime);
}

.page-about .about-facts__label {
  display: block;
  margin-top: 6px;
  font-size: 0.76rem;
  line-height: 1.5;
  color: var(--fog);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  overflow: hidden;
  border-top-color: rgba(180, 85, 60, 0.55);
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--clay), var(--orange) 40%, var(--cyan) 100%);
  opacity: 0.85;
}

.page-about .about-timeline__bg {
  position: absolute;
  inset: 0;
  margin: 0;
  opacity: 0.4;
  pointer-events: none;
}

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

.page-about .about-timeline__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 27, 46, 0.6), rgba(10, 27, 46, 0.94));
}

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

.page-about .about-timeline__list {
  list-style: none;
  margin: 30px 0 0;
  padding: 0 0 0 26px;
  position: relative;
}

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--cyan), var(--clay) 72%, rgba(180, 85, 60, 0));
}

.page-about .about-timeline__list > li {
  position: relative;
  margin-bottom: 10px;
}

.page-about .about-timeline__list > li:last-child {
  margin-bottom: 0;
}

.page-about .about-timeline__list > li::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 20px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--cyan);
  box-sizing: border-box;
}

.page-about .about-timeline__node {
  background: rgba(16, 42, 68, 0.78);
  border: 1px solid var(--about-line);
  border-radius: var(--radius-md);
  padding: 2px 16px;
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease);
}

.page-about .about-timeline__node:hover,
.page-about .about-timeline__node[open] {
  border-color: rgba(53, 224, 214, 0.5);
  background: rgba(16, 42, 68, 0.95);
}

.page-about .about-timeline__summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  min-height: 44px;
  box-sizing: border-box;
  padding: 12px 0;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-timeline__summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-timeline__node[open] > .about-timeline__summary::after {
  content: "−";
  color: var(--orange);
}

.page-about .about-timeline__year {
  font-family: var(--font-display);
  font-size: 1.28rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--orange);
}

.page-about .about-timeline__name {
  font-size: 0.92rem;
  line-height: 1.5;
  color: var(--mist);
}

.page-about .about-timeline__detail {
  border-top: 1px dashed rgba(155, 243, 236, 0.25);
}

.page-about .about-timeline__detail p {
  margin: 12px 0 14px;
  max-width: 62ch;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--about-body-soft);
}

/* ---------- 分类体系（浅色） ---------- */
.page-about .about-chapter--paper {
  background: var(--paper);
  color: var(--ink);
  border-top-color: rgba(180, 85, 60, 0.5);
}

.page-about .about-chapter--paper .about-chapter__title {
  color: var(--ink);
}

.page-about .about-chapter--paper .about-chapter__num {
  color: var(--clay);
  opacity: 0.45;
}

.page-about .about-chapter--paper .eyebrow {
  color: var(--clay);
}

.page-about .about-chapter--paper .about-chapter__body p {
  color: #37444f;
}

.page-about .about-map__figure {
  margin: 26px auto 0;
  max-width: 480px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(150deg, var(--ink) 0%, var(--ink-2) 100%);
  border: 1px solid rgba(10, 27, 46, 0.14);
}

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

.page-about .about-map__dims {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 24px 0 0;
  padding: 0;
}

.page-about .about-map__dim {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid rgba(10, 27, 46, 0.2);
  background: rgba(255, 255, 255, 0.55);
  font-family: var(--font-mono);
  font-size: 0.84rem;
  color: var(--ink);
  transition: background 0.22s var(--ease), color 0.22s var(--ease), border-color 0.22s var(--ease);
}

.page-about .about-map__dim:hover,
.page-about .about-map__dim:focus-visible {
  background: var(--ink);
  color: var(--cyan);
  border-color: var(--ink);
}

.page-about .about-map__dim--note {
  border-style: dashed;
  border-color: rgba(180, 85, 60, 0.55);
  color: var(--clay);
  background: transparent;
  font-family: var(--font-sans);
  font-size: 0.8rem;
}

.page-about .about-map__dim--note:hover {
  background: var(--clay);
  border-color: var(--clay);
  color: var(--paper);
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: 26px;
}

.page-about .about-team__intro {
  margin: 0 0 20px;
  max-width: 60ch;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--about-body-soft);
}

.page-about .about-team__lines {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-team__line {
  border: 1px solid var(--about-line);
  border-left-width: 4px;
  border-radius: var(--radius-md);
  padding: 15px 16px;
  background: linear-gradient(135deg, rgba(16, 42, 68, 0.95), rgba(16, 42, 68, 0.55));
  transition: transform 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-about .about-team__line:nth-child(1) {
  border-left-color: var(--cyan);
}

.page-about .about-team__line:nth-child(2) {
  border-left-color: var(--lime);
}

.page-about .about-team__line:nth-child(3) {
  border-left-color: var(--orange);
}

.page-about .about-team__line:nth-child(4) {
  border-left-color: var(--moss);
}

.page-about .about-team__line:hover,
.page-about .about-team__line:focus-within {
  transform: translateX(4px);
  border-color: rgba(53, 224, 214, 0.45);
}

.page-about .about-team__line-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 6px;
}

.page-about .about-team__line-name {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--paper);
}

.page-about .about-team__line-count {
  font-family: var(--font-mono);
  font-size: 0.86rem;
  color: var(--lime);
}

.page-about .about-team__line-desc {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.75;
  color: var(--about-body-soft);
}

.page-about .about-team__figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--about-line);
  background: var(--ink-2);
}

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

.page-about .about-team__caption {
  padding: 12px 16px 14px;
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--fog);
}

/* ---------- 场景 ---------- */
.page-about .about-scenes {
  display: grid;
  gap: 14px;
  margin-top: 26px;
}

.page-about .about-scene {
  border: 1px solid var(--about-line);
  border-radius: var(--radius-lg);
  padding: 20px 18px;
  background: linear-gradient(160deg, rgba(16, 42, 68, 0.9), rgba(46, 58, 70, 0.55));
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-about .about-scene:hover {
  border-color: rgba(198, 242, 78, 0.45);
  transform: translateY(-3px);
}

.page-about .about-scene__title {
  margin: 0 0 8px;
  font-family: var(--font-serif);
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--paper);
}

.page-about .about-scene__text {
  margin: 0;
  font-size: 0.87rem;
  line-height: 1.78;
  color: var(--about-body-soft);
}

.page-about .about-scene__more {
  margin: 24px 0 0;
  max-width: 66ch;
  font-size: 0.92rem;
  line-height: 1.85;
  color: var(--about-body);
}

/* ---------- 信任信息 ---------- */
.page-about .about-trust {
  padding-bottom: 64px;
}

.page-about .about-trust__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 24px 0 0;
  padding: 0;
  background: var(--about-line);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .about-trust__item {
  background: var(--ink-2);
  padding: 16px;
}

.page-about .about-trust__label {
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  color: var(--fog);
}

.page-about .about-trust__value {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  line-height: 1.65;
  color: var(--mist);
  word-break: break-word;
}

.page-about .about-trust__note {
  margin: 18px 0 0;
  max-width: 60ch;
  font-size: 0.84rem;
  line-height: 1.75;
  color: var(--fog);
}

.page-about .about-trust__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-btn {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  box-sizing: border-box;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-mast {
    padding: 30px 0 62px;
  }

  .page-about .about-mast__cols {
    grid-template-columns: 1fr 1fr;
    gap: 44px;
  }

  .page-about .about-chapter {
    padding: 58px 0;
  }

  .page-about .about-chapter__num {
    font-size: 66px;
  }

  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-trust__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .about-chapter__head {
    gap: 24px;
  }

  .page-about .about-chapter__num {
    font-size: 88px;
  }

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

  .page-about .about-timeline__list::before {
    left: 8px;
  }

  .page-about .about-timeline__list > li::before {
    left: -34px;
    width: 14px;
    height: 14px;
  }

  .page-about .about-team__grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 44px;
    align-items: start;
  }

  .page-about .about-map__figure {
    max-width: 560px;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-team__line,
  .page-about .about-scene,
  .page-about .about-map__dim,
  .page-about .about-timeline__node {
    transition: none;
  }

  .page-about .about-team__line:hover,
  .page-about .about-team__line:focus-within,
  .page-about .about-scene:hover {
    transform: none;
  }
}
<<<END>>>