.page-about {
  background: var(--ink);
  color: var(--paper);
  overflow-x: clip;
  padding-bottom: 0;
}

.page-about .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.page-about .breadcrumbs a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

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

.page-about .breadcrumbs li[aria-current="page"] {
  color: var(--cyan);
}

.page-about .section-title {
  font-family: var(--font-head);
  font-size: clamp(26px, 4.6vw, 44px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  margin: 12px 0 0;
  text-wrap: balance;
}

.page-about .lede {
  max-width: 62ch;
  margin: 16px 0 0;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.75;
  color: rgba(243, 233, 210, 0.78);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: clamp(86px, 15vw, 170px) 0 clamp(40px, 6vw, 72px);
  background:
    radial-gradient(110% 72% at 88% 0%, rgba(53, 242, 192, 0.16), transparent 62%),
    linear-gradient(180deg, var(--ink) 0%, var(--panel-deep) 100%);
}

.page-about .about-hero-grid {
  display: grid;
  gap: clamp(28px, 5vw, 48px);
}

.page-about .about-hero-copy h1 {
  font-family: var(--font-head);
  font-size: clamp(32px, 6.8vw, 66px);
  line-height: 1.03;
  letter-spacing: -0.02em;
  margin: 10px 0 0;
  text-wrap: balance;
}

.page-about .about-hero-copy .lede {
  margin-top: 18px;
  max-width: 58ch;
}

.page-about .hero-strip {
  margin-top: clamp(26px, 4vw, 40px);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--hair);
  border: 1px solid var(--hair);
}

.page-about .strip-cell {
  background: rgba(12, 58, 49, 0.78);
  padding: 14px 16px 16px;
}

.page-about .strip-cell .data-figure {
  display: block;
  font-size: clamp(24px, 3.4vw, 32px);
  line-height: 1;
  color: var(--cyan);
}

.page-about .strip-label {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about .about-hero-visual {
  position: relative;
}

.page-about .about-hero-visual .media {
  border: 1px solid var(--hair);
  background: var(--panel-deep);
}

.page-about .hero-chip {
  position: absolute;
  right: clamp(10px, 3vw, 20px);
  bottom: clamp(10px, 3vw, 20px);
  margin: 0;
  padding: 8px 12px;
  background: var(--paper);
  color: var(--brown);
  font-size: 11px;
  letter-spacing: 0.1em;
  border-left: 3px solid var(--flame);
}

/* ---------- 品牌定位 ---------- */

.page-about .about-stance {
  padding: clamp(52px, 8vw, 100px) 0 clamp(36px, 5vw, 64px);
  background: var(--ink);
}

.page-about .stance-grid {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
}

.page-about .stance-body {
  color: rgba(243, 233, 210, 0.82);
}

.page-about .stance-lead {
  font-family: var(--font-edit);
  font-size: clamp(18px, 2.2vw, 23px);
  line-height: 1.62;
  color: var(--paper);
  margin-top: 0;
}

.page-about .stance-body p {
  margin: 0 0 1em;
  font-size: 15.5px;
  line-height: 1.78;
}

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

/* ---------- 时间线 ---------- */

.page-about .about-timeline {
  padding: clamp(44px, 7vw, 84px) 0 clamp(48px, 7vw, 88px);
  background: linear-gradient(180deg, var(--panel-deep), var(--ink));
  border-top: 1px solid var(--hair-soft);
  border-bottom: 1px solid var(--hair-soft);
}

.page-about .ruler {
  position: relative;
  height: 18px;
  margin-top: clamp(22px, 3vw, 34px);
  border-top: 1px solid var(--hair);
  background-image: repeating-linear-gradient(to right, var(--hair-soft) 0 1px, transparent 1px 14px);
  background-size: auto 9px;
  background-repeat: repeat-x;
}

.page-about .ruler::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 13px;
  background-image: repeating-linear-gradient(to right, var(--flame) 0 1px, transparent 1px 140px);
  opacity: 0.9;
}

.page-about .tl-rail {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: clamp(238px, 78vw, 312px);
  gap: 12px;
  margin: 0;
  padding: 16px 0 20px;
  list-style: none;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x proximity;
  scrollbar-width: thin;
  scrollbar-color: var(--edge) transparent;
}

.page-about .tl-rail::-webkit-scrollbar {
  height: 6px;
}

.page-about .tl-rail::-webkit-scrollbar-thumb {
  background: var(--edge);
}

.page-about .tl-rail:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
}

.page-about .tl-node {
  position: relative;
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 24px 18px 20px;
  background: linear-gradient(180deg, rgba(12, 58, 49, 0.92), rgba(7, 43, 37, 0.92));
  border-top: 2px solid var(--hair);
}

.page-about .tl-node::before {
  content: "";
  position: absolute;
  top: -2px;
  left: 0;
  width: 38px;
  height: 2px;
  background: var(--cyan);
}

.page-about .tl-node--now {
  border-top-color: var(--flame);
  background: linear-gradient(180deg, rgba(255, 90, 54, 0.14), rgba(7, 43, 37, 0.94));
}

.page-about .tl-node--now::before {
  background: var(--flame);
}

.page-about .tl-year {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--flame);
}

.page-about .tl-node h3 {
  margin: 0;
  font-family: var(--font-head);
  font-size: 20px;
  line-height: 1.16;
  letter-spacing: -0.01em;
}

.page-about .tl-node p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(243, 233, 210, 0.76);
}

.page-about .tl-node .tag {
  align-self: flex-start;
  margin-top: 2px;
}

.page-about .rail-hint {
  margin: 6px 0 0;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

/* ---------- 团队 ---------- */

.page-about .about-team {
  padding: clamp(52px, 8vw, 104px) 0;
  background: var(--ink);
}

.page-about .team-grid {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
}

.page-about .team-figure {
  border: 1px solid var(--hair);
  background: var(--panel-deep);
}

.page-about .team-copy p {
  margin: 16px 0 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: rgba(243, 233, 210, 0.82);
}

.page-about .team-stats {
  display: grid;
  gap: 1px;
  margin: 26px 0 0;
  background: var(--hair);
  border: 1px solid var(--hair);
}

.page-about .team-stat {
  background: rgba(12, 58, 49, 0.6);
  padding: 16px 14px 18px;
}

.page-about .team-stat dt {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-about .team-stat dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 28px;
  line-height: 1;
  color: var(--cyan);
}

.page-about .team-stat dd small {
  margin-left: 5px;
  font-family: var(--font-body);
  font-size: 12px;
  color: var(--mist);
}

/* ---------- 协作生态 ---------- */

.page-about .about-network {
  padding: clamp(52px, 8vw, 104px) 0;
  background: linear-gradient(180deg, var(--ink), var(--panel-deep) 70%, var(--ink));
  border-top: 1px solid var(--hair-soft);
}

.page-about .network-grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  margin-top: clamp(28px, 4vw, 44px);
}

.page-about .graph-label {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.page-about .node-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .node {
  position: relative;
  padding: 13px 16px 13px 48px;
  background: rgba(12, 58, 49, 0.62);
  border: 1px solid var(--hair-soft);
  font-family: var(--font-head);
  font-size: 16px;
  letter-spacing: 0.02em;
  color: var(--paper);
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.page-about .node::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 50%;
  width: 13px;
  height: 13px;
  margin-top: -6.5px;
  border-radius: 50%;
  border: 2px solid var(--cyan);
  background: var(--panel-deep);
  transition: background 0.2s ease;
}

.page-about .graph-note {
  margin: 16px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(243, 233, 210, 0.72);
}

.page-about .network-side {
  display: grid;
  gap: 20px;
}

.page-about .network-figure {
  border: 1px solid var(--hair);
  background: var(--panel-deep);
}

.page-about .honor-box {
  padding: 20px 18px 22px;
  background: var(--paper);
  color: var(--brown);
  border-left: 4px solid var(--gold);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.34);
}

.page-about .honor-count {
  margin: 0 0 14px;
  font-size: 14px;
  letter-spacing: 0.02em;
}

.page-about .honor-count .data-figure {
  font-size: 26px;
  color: var(--brown);
  margin-right: 6px;
}

.page-about .honor-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-about .honor-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.5;
  font-weight: 600;
}

.page-about .honor-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 9px;
  height: 9px;
  background: var(--gold);
  transform: rotate(45deg);
}

.page-about .honor-note {
  margin: 14px 0 0;
  font-size: 12.5px;
  line-height: 1.6;
  color: rgba(26, 20, 16, 0.68);
}

/* ---------- 服务场景 ---------- */

.page-about .about-scenes {
  padding: clamp(52px, 8vw, 104px) 0 clamp(20px, 3vw, 36px);
  background: var(--ink);
}

.page-about .scene-list {
  display: grid;
  gap: 18px;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .scene-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 24px 22px 22px;
  background: var(--paper);
  color: var(--brown);
  border-top: 4px solid var(--flame);
  box-shadow: 7px 7px 0 rgba(0, 0, 0, 0.34);
}

.page-about .scene-index {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: rgba(26, 20, 16, 0.6);
}

.page-about .scene-card h3 {
  margin: 0;
  font-family: var(--font-head);
  font-size: 22px;
  line-height: 1.14;
  letter-spacing: -0.01em;
}

.page-about .scene-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(26, 20, 16, 0.84);
}

.page-about .scene-link {
  margin-top: auto;
  padding-top: 6px;
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--brown);
  text-decoration: none;
  border-bottom: 2px solid var(--flame);
}

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

.page-about .scale-band {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(30px, 5vw, 48px);
  background: var(--hair);
  border: 1px solid var(--hair);
}

.page-about .scale-cell {
  background: rgba(12, 58, 49, 0.72);
  padding: 18px 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .scale-cell .data-figure {
  font-size: clamp(22px, 3.2vw, 30px);
  line-height: 1;
  color: var(--cyan);
}

.page-about .scale-label {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

/* ---------- 收尾行动区 ---------- */

.page-about .about-cta {
  margin-top: clamp(46px, 7vw, 88px);
  padding: clamp(40px, 7vw, 76px) 0;
  background:
    linear-gradient(96deg, rgba(53, 242, 192, 0.13), rgba(255, 90, 54, 0.12) 78%, transparent),
    var(--panel-deep);
  border-top: 1px solid var(--hair);
}

.page-about .about-cta-inner p {
  max-width: 58ch;
  margin: 16px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(243, 233, 210, 0.8);
}

.page-about .cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .cta-actions .btn {
  flex: 1 1 auto;
  justify-content: center;
  text-align: center;
}

/* ---------- 交互与响应式 ---------- */

@media (hover: hover) {
  .page-about .node:hover,
  .page-about .node:focus-within {
    background: rgba(53, 242, 192, 0.12);
    border-color: var(--cyan);
    transform: translateX(4px);
  }

  .page-about .node:hover::before {
    background: var(--cyan);
  }
}

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

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

  .page-about .cta-actions .btn {
    flex: 0 1 auto;
  }
}

@media (min-width: 760px) {
  .page-about .scene-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .stance-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
    gap: clamp(28px, 4vw, 56px);
  }

  .page-about .stance-head .section-title {
    margin-top: 14px;
  }

  .page-about .team-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    align-items: center;
  }

  .page-about .network-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }
}

@media (min-width: 980px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }

  .page-about .about-cta-inner {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: clamp(28px, 4vw, 56px);
    align-items: center;
  }

  .page-about .cta-actions {
    margin-top: 0;
    justify-content: flex-end;
    flex-wrap: nowrap;
  }
}

@media (min-width: 1180px) {
  .page-about .tl-rail {
    grid-auto-columns: minmax(0, 1fr);
    overflow-x: visible;
  }

  .page-about .rail-hint {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .node,
  .page-about .tl-rail {
    transition: none;
    scroll-behavior: auto;
  }
}