.page-about {
  --about-glow: rgba(53, 208, 224, 0.14);
  --about-track: rgba(62, 155, 107, 0.9);
  padding-bottom: 56px;
}

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

.page-about img {
  max-width: 100%;
  height: auto;
}

.page-about .breadcrumbs {
  margin: 4px 0 22px;
}

.page-about .breadcrumbs-current {
  color: var(--snow-50);
  font-size: 13px;
  letter-spacing: 0.06em;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  display: grid;
  gap: 30px;
  padding-bottom: 34px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero-copy .eyebrow {
  margin-bottom: 14px;
}

.page-about .about-hero h1 {
  margin: 0 0 18px;
  font-size: clamp(28px, 7.2vw, 52px);
  line-height: 1.16;
  letter-spacing: 0.03em;
  font-weight: 800;
  color: var(--snow);
}

.page-about .about-hero .lede {
  margin: 0 0 24px;
  max-width: 62ch;
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-hero-nums {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  clip-path: polygon(var(--cut) 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%, 0 var(--cut));
}

.page-about .about-num {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 8px;
  min-height: 108px;
  padding: 18px 16px 20px;
  background: var(--ink-800);
}

.page-about .about-num strong {
  font-family: var(--font-num);
  font-weight: 800;
  font-size: clamp(30px, 8vw, 44px);
  line-height: 0.94;
  letter-spacing: -0.01em;
  color: var(--snow);
}

.page-about .about-num:first-child strong {
  color: var(--orange);
}

.page-about .about-num:last-child strong {
  color: var(--neon);
}

.page-about .about-num span {
  font-size: 13px;
  line-height: 1.5;
  letter-spacing: 0.03em;
  color: var(--snow-70);
}

/* ---------- 页内章节导航 ---------- */

.page-about .about-route {
  display: flex;
  gap: 8px;
  margin: 26px 0 0;
  padding: 0 0 10px;
  overflow-x: auto;
  scrollbar-width: none;
  border-bottom: 1px solid var(--line);
}

.page-about .about-route::-webkit-scrollbar {
  display: none;
}

.page-about .about-route .local-route-link {
  flex: 0 0 auto;
  white-space: nowrap;
}

/* ---------- 章节通用 ---------- */

.page-about .about-history,
.page-about .about-team,
.page-about .about-sources,
.page-about .about-quality,
.page-about .about-milestones,
.page-about .about-contact {
  padding-top: 48px;
}

.page-about .section-title {
  font-size: clamp(22px, 5.4vw, 36px);
  line-height: 1.24;
  letter-spacing: 0.05em;
}

.page-about .section-desc {
  max-width: 68ch;
  margin-top: 12px;
}

/* ---------- 历程 ---------- */

.page-about .about-history-figure {
  margin: 26px 0 0;
  border: 1px solid var(--line);
  background: var(--ink-800);
}

.page-about .about-history-figure img {
  width: 100%;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

.page-about .about-history-figure .media-caption {
  padding: 12px 16px 14px;
}

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

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 13px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(to bottom, var(--about-track) 0%, rgba(62, 155, 107, 0.35) 55%, var(--line) 100%);
}

.page-about .about-stage {
  position: relative;
  padding-left: 40px;
  margin-bottom: 16px;
}

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

.page-about .about-stage-node {
  position: absolute;
  left: 6px;
  top: 20px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--ink-900);
  border: 2px solid var(--barley);
  box-shadow: 0 0 0 4px rgba(62, 155, 107, 0.14);
  z-index: 1;
}

.page-about .about-stage:nth-child(3) .about-stage-node,
.page-about .about-stage:nth-child(5) .about-stage-node {
  border-color: var(--orange);
  box-shadow: 0 0 0 5px rgba(255, 107, 44, 0.18);
}

.page-about .about-stage-inner {
  padding: 18px 18px 20px;
  background: var(--ink-800);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease);
}

.page-about .about-stage:nth-child(3) .about-stage-inner,
.page-about .about-stage:nth-child(5) .about-stage-inner {
  background: linear-gradient(140deg, rgba(255, 107, 44, 0.1), var(--ink-800) 46%);
}

.page-about .about-stage-time {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  margin: 0 0 10px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--snow-50);
}

.page-about .about-stage-year {
  font-family: var(--font-num);
  font-weight: 800;
  font-size: 16px;
  letter-spacing: 0.02em;
  color: var(--orange);
}

.page-about .about-stage-title {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: 0.03em;
  color: var(--snow);
}

.page-about .about-stage-text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--snow-70);
}

.page-about .about-stage-more {
  margin: 12px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--rock);
}

/* ---------- 团队 ---------- */

.page-about .about-team-grid {
  display: grid;
  gap: 24px;
  margin-top: 26px;
}

.page-about .about-roles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-role {
  padding: 14px 16px 16px 18px;
  border-left: 2px solid var(--barley);
  background: linear-gradient(90deg, rgba(19, 42, 84, 0.92), rgba(11, 27, 58, 0.35));
}

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

.page-about .about-role h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--snow);
}

.page-about .about-role p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--snow-70);
}

.page-about .about-team-figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-800);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
}

.page-about .about-team-figure img {
  width: 100%;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

.page-about .about-team-figure .media-caption {
  padding: 12px 16px 14px;
}

/* ---------- 内容来源 ---------- */

.page-about .about-sources-block {
  margin-top: 26px;
}

.page-about .about-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.page-about .about-partner-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .about-partner {
  position: relative;
  padding: 20px 20px 22px;
  background: var(--ink-800);
  border: 1px solid var(--line);
  overflow: hidden;
}

.page-about .about-partner::after {
  content: "";
  position: absolute;
  right: -46px;
  top: -46px;
  width: 140px;
  height: 140px;
  background: radial-gradient(circle, var(--about-glow), transparent 70%);
  pointer-events: none;
}

.page-about .about-partner-tag {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--butter);
}

.page-about .about-partner h3 {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: 0.03em;
  color: var(--snow);
}

.page-about .about-partner p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--snow-70);
}

.page-about .about-network-figure {
  margin: 26px 0 0;
  padding: 10px;
  border: 1px solid var(--line-strong);
  background: linear-gradient(155deg, rgba(242, 184, 75, 0.09), rgba(53, 208, 224, 0.05));
}

.page-about .about-network-figure img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.page-about .about-network-figure .media-caption {
  padding: 12px 8px 6px;
}

/* ---------- 审核与安全 ---------- */

.page-about .about-guarantees {
  display: grid;
  grid-template-columns: 1fr;
  margin-top: 8px;
}

.page-about .about-guarantee {
  display: grid;
  grid-template-columns: 2.4rem minmax(0, 1fr);
  gap: 14px;
  padding: 22px 0 24px;
  border-top: 1px solid var(--line);
}

.page-about .about-guarantee-idx {
  font-family: var(--font-num);
  font-weight: 800;
  font-size: 19px;
  line-height: 1.4;
  letter-spacing: 0.04em;
  color: var(--butter);
}

.page-about .about-guarantee h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--snow);
}

.page-about .about-guarantee p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--snow-70);
}

/* ---------- 荣誉与规模 ---------- */

.page-about .about-milestones-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 28px;
}

.page-about .about-milestone {
  padding: 22px 20px 24px;
  background: var(--ink-800);
  border-top: 2px solid var(--butter);
}

.page-about .about-milestone:nth-child(2) {
  border-top-color: var(--barley);
}

.page-about .about-milestone:nth-child(3) {
  border-top-color: var(--neon);
}

.page-about .about-milestone:nth-child(4) {
  border-top-color: var(--orange);
}

.page-about .about-milestone-label {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--rock);
}

.page-about .about-milestone-value {
  margin: 0 0 10px;
  font-family: var(--font-num);
  font-weight: 800;
  font-size: clamp(20px, 5vw, 26px);
  line-height: 1.25;
  letter-spacing: 0.01em;
  color: var(--snow);
}

.page-about .about-milestone-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--snow-70);
}

/* ---------- 合作入口 ---------- */

.page-about .about-contact-panel {
  display: grid;
  gap: 26px;
  padding: 26px 20px 28px;
  background: linear-gradient(150deg, rgba(19, 42, 84, 0.95), rgba(5, 10, 22, 0.9));
  border: 1px solid var(--line-strong);
  clip-path: polygon(var(--cut) 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%, 0 var(--cut));
}

.page-about .about-contact-main .section-desc {
  margin-bottom: 22px;
}

.page-about .about-contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-contact-card {
  padding: 20px 18px 22px;
  background: rgba(5, 10, 22, 0.6);
  border: 1px solid var(--line);
}

.page-about .about-contact-label {
  margin: 0 0 6px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--rock);
}

.page-about .about-contact-value {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.6;
  word-break: break-all;
  color: var(--snow);
}

.page-about .about-contact-card .copy-btn {
  margin-bottom: 20px;
}

.page-about .about-contact-note {
  margin: 6px 0 0;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
  font-size: 13px;
  line-height: 1.75;
  color: var(--rock);
}

/* ---------- 响应式 ---------- */

@media (hover: hover) and (min-width: 860px) {
  .page-about .about-stage-inner:hover {
    transform: translateX(5px);
    border-color: var(--line-strong);
  }

  .page-about .about-stage-inner:hover .about-stage-more {
    color: var(--snow-50);
  }
}

@media (min-width: 640px) {
  .page-about .about-partner-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 860px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: end;
    gap: 42px;
    padding-bottom: 42px;
  }

  .page-about .about-timeline {
    padding-left: 10px;
  }

  .page-about .about-stage {
    padding-left: 56px;
    margin-bottom: 22px;
  }

  .page-about .about-stage-node {
    left: 14px;
    top: 24px;
  }

  .page-about .about-timeline::before {
    left: 21px;
  }

  .page-about .about-stage-inner {
    padding: 22px 24px 24px;
  }

  .page-about .about-stage:nth-child(odd) .about-stage-inner {
    max-width: 660px;
  }

  .page-about .about-stage:nth-child(even) .about-stage-inner {
    max-width: 560px;
    margin-left: 74px;
  }

  .page-about .about-guarantees {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 44px;
  }

  .page-about .about-network-figure {
    max-width: 560px;
    margin: 34px auto 0;
  }

  .page-about .about-contact-panel {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    gap: 40px;
    padding: 36px 34px 38px;
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 38px;
    align-items: start;
  }

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

@media (min-width: 1040px) {
  .page-about .about-hero-nums {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-num {
    min-height: 124px;
    padding: 22px 20px 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-stage-inner {
    transition: none;
  }
}