.page-about {
  --pa-rule: rgba(233, 235, 231, 0.14);
  --pa-rule-ink: rgba(27, 21, 17, 0.16);
  --pa-muted: rgba(233, 235, 231, 0.66);
  --pa-muted-ink: rgba(27, 21, 17, 0.72);
  background: var(--indigo);
  color: var(--fog);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-head);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin: 0;
}

.page-about p {
  margin: 0;
}

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

/* ============ 首屏 ============ */

.page-about .about-hero {
  padding: clamp(20px, 3vw, 36px) 0 clamp(40px, 6vw, 76px);
}

.page-about .about-hero .breadcrumbs {
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--pa-muted);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.page-about .about-hero .breadcrumbs a {
  color: var(--mane);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s var(--ease);
}

.page-about .about-hero .breadcrumbs a:hover {
  border-bottom-color: var(--amber);
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 44px);
  padding-top: clamp(26px, 4vw, 48px);
}

.page-about .about-kicker {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--amber);
  margin: 0 0 16px;
}

.page-about .about-hero h1 {
  font-size: clamp(34px, 7.2vw, 74px);
  max-width: 15ch;
  color: var(--fog);
}

.page-about .about-hero__lede p {
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.8;
  color: var(--fog);
}

.page-about .about-hero__lede p + p {
  margin-top: 14px;
  color: var(--pa-muted);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 30px 0 0;
  padding: 22px 0 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 22px;
  border-top: var(--rail) solid var(--asphalt);
}

.page-about .about-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-left: 12px;
  border-left: 2px solid var(--amber);
}

.page-about .about-hero__facts .num {
  font-family: var(--font-num);
  font-size: clamp(24px, 3.2vw, 34px);
  line-height: 1;
  color: var(--amber);
  letter-spacing: -0.02em;
}

.page-about .about-hero__fact-label {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--pa-muted);
}

.page-about .about-hero__annot {
  display: none;
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.18fr);
    column-gap: clamp(40px, 6vw, 96px);
    align-items: start;
    padding-right: 72px;
  }

  .page-about .about-hero__annot {
    display: block;
    position: absolute;
    top: 4px;
    right: 0;
    writing-mode: vertical-rl;
    font-family: var(--font-num);
    font-size: 12px;
    letter-spacing: 0.24em;
    line-height: 1;
    color: var(--mane);
    opacity: 0.7;
  }
}

/* ============ 通用章节带 ============ */

.page-about .about-band {
  position: relative;
  padding: clamp(48px, 7vw, 100px) 0;
  border-top: var(--rail) solid var(--asphalt);
}

.page-about .about-band--paper {
  background: var(--cream);
  color: var(--ink);
  border-top-color: var(--asphalt);
}

.page-about .about-band--panel {
  background: var(--panel);
}

.page-about .band-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding-bottom: 20px;
  border-bottom: 2px solid var(--asphalt);
  margin-bottom: clamp(28px, 4vw, 52px);
}

.page-about .band-head__num {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--amber);
}

.page-about .band-head__num::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--amber);
  flex: none;
}

.page-about .band-head__title {
  font-size: clamp(26px, 4.2vw, 44px);
  color: var(--fog);
}

.page-about .band-head__note {
  font-size: 13px;
  line-height: 1.75;
  color: var(--pa-muted);
}

.page-about .band-head--ink {
  border-bottom-color: var(--ink);
}

.page-about .band-head--ink .band-head__title {
  color: var(--ink);
}

.page-about .band-head--ink .band-head__note {
  color: var(--pa-muted-ink);
}

@media (min-width: 780px) {
  .page-about .band-head {
    grid-template-columns: 72px minmax(0, 1.1fr) minmax(0, 0.85fr);
    align-items: baseline;
    gap: 6px 20px;
  }

  .page-about .band-head__num {
    align-self: start;
    padding-top: 6px;
  }

  .page-about .band-head__note {
    text-align: right;
  }
}

/* ============ 001 起点 ============ */

.page-about .origin-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 32px);
}

.page-about .origin-lead {
  font-family: var(--font-head);
  font-size: clamp(18px, 2.3vw, 25px);
  font-weight: 800;
  line-height: 1.5;
  color: var(--mane);
  border-left: 2px solid var(--amber);
  padding-left: 16px;
}

.page-about .origin-body p {
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--pa-muted);
}

.page-about .origin-body p + p {
  margin-top: 16px;
}

@media (min-width: 860px) {
  .page-about .origin-grid {
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
    column-gap: clamp(36px, 5vw, 88px);
  }
}

/* ============ 002 服务范围 ============ */

.page-about .scope-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
}

.page-about .scope-card {
  padding: 24px 0;
  border-top: 2px solid var(--ink);
}

.page-about .scope-card:first-child {
  border-top: 2px solid var(--ink);
}

.page-about .scope-card__label {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 19px;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.page-about .scope-card__metric {
  margin-top: 16px;
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-about .scope-card__num {
  font-family: var(--font-num);
  font-size: clamp(40px, 5.4vw, 62px);
  line-height: 0.9;
  letter-spacing: -0.03em;
  color: var(--ink);
  transition: color 0.3s var(--ease);
}

.page-about .scope-card__unit {
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--pa-muted-ink);
}

.page-about .scope-card__text {
  margin-top: 16px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--pa-muted-ink);
}

.page-about .scope-card:hover .scope-card__num {
  color: var(--orange);
}

@media (min-width: 860px) {
  .page-about .scope-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .scope-card {
    padding: 26px clamp(20px, 2.6vw, 40px) 0;
    border-top: 2px solid var(--ink);
    border-left: 1px solid var(--pa-rule-ink);
  }

  .page-about .scope-card:first-child {
    padding-left: 0;
    border-left: 0;
  }

  .page-about .scope-card:last-child {
    padding-right: 0;
  }
}

/* ============ 003 编目流程 ============ */

.page-about .craft-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
}

.page-about .craft-steps {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .craft-step {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 12px;
  padding: 18px 0;
  border-top: 1px solid var(--pa-rule);
}

.page-about .craft-step:last-child {
  border-bottom: 1px solid var(--pa-rule);
}

.page-about .craft-step__num {
  font-family: var(--font-num);
  font-size: 20px;
  line-height: 1.3;
  color: var(--amber);
}

.page-about .craft-step__title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 17px;
  color: var(--fog);
}

.page-about .craft-step__text {
  margin-top: 7px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--pa-muted);
}

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

.page-about .craft-figure {
  margin: 0;
  aspect-ratio: 3 / 2;
  border: 1px solid var(--asphalt);
  background: var(--panel);
}

@media (min-width: 920px) {
  .page-about .craft-grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    column-gap: clamp(36px, 5vw, 76px);
    align-items: start;
  }
}

/* ============ 004 团队 ============ */

.page-about .team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
}

.page-about .team-roles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.page-about .team-role {
  border: 1px solid var(--asphalt);
  background: rgba(14, 26, 43, 0.55);
  padding: 14px 16px;
}

.page-about .team-role__n {
  display: block;
  font-family: var(--font-num);
  font-size: 26px;
  line-height: 1;
  color: var(--amber);
}

.page-about .team-role__name {
  display: block;
  margin-top: 6px;
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--pa-muted);
}

.page-about .team-note {
  margin-top: 18px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--pa-muted);
  border-left: 2px solid var(--amber);
  padding-left: 14px;
}

.page-about .team-body p {
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--pa-muted);
}

.page-about .team-body p + p {
  margin-top: 16px;
}

.page-about .team-body a {
  color: var(--mane);
  text-decoration: none;
  border-bottom: 1px solid var(--amber);
}

.page-about .team-body a:hover {
  color: var(--amber);
}

.page-about .team-figure {
  margin: clamp(30px, 4vw, 56px) 0 0;
  aspect-ratio: 16 / 7;
  border: 1px solid var(--asphalt);
  background: var(--indigo);
}

@media (min-width: 920px) {
  .page-about .team-grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    column-gap: clamp(36px, 5vw, 80px);
    align-items: start;
  }
}

/* ============ 005 版本时间轴 ============ */

.page-about .about-band--timeline {
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.page-about .timeline-media {
  position: absolute;
  inset: 0;
  z-index: 0;
  opacity: 0.2;
  pointer-events: none;
}

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

.page-about .timeline-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, var(--indigo) 0%, rgba(14, 26, 43, 0.3) 45%, var(--indigo) 100%);
}

.page-about .about-band--timeline > .wrap {
  position: relative;
  z-index: 1;
}

.page-about .road-timeline {
  position: relative;
  padding-left: 30px;
}

.page-about .road-timeline::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 14px;
  bottom: 14px;
  width: 1px;
  background: linear-gradient(180deg, var(--amber) 0%, rgba(224, 169, 59, 0.12) 100%);
}

.page-about .road-node {
  position: relative;
}

.page-about .road-node::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 28px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 0 4px rgba(224, 169, 59, 0.13);
}

.page-about .road-node--now::before {
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(244, 102, 31, 0.16);
}

.page-about .road-node summary {
  cursor: pointer;
  list-style: none;
  display: grid;
  grid-template-columns: 66px minmax(0, 1fr) 16px;
  gap: 12px;
  align-items: baseline;
  padding: 16px 0 16px 4px;
  border-bottom: 1px solid var(--pa-rule);
}

.page-about .road-node summary::-webkit-details-marker {
  display: none;
}

.page-about .road-node__year {
  font-family: var(--font-num);
  font-size: 18px;
  letter-spacing: 0.04em;
  color: var(--mane);
  transition: color 0.25s var(--ease);
}

.page-about .road-node__title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(16px, 2vw, 20px);
  color: var(--fog);
  transition: color 0.25s var(--ease);
}

.page-about .road-node__sign {
  justify-self: end;
  font-family: var(--font-num);
  font-size: 16px;
  color: var(--pa-muted);
  transition: color 0.25s var(--ease);
}

.page-about .road-node summary:hover .road-node__title {
  color: var(--mane);
}

.page-about .road-node details[open] .road-node__year,
.page-about .road-node details[open] .road-node__sign {
  color: var(--orange);
}

.page-about .road-node__body {
  padding: 0 0 20px 82px;
}

.page-about .road-node__body p {
  font-size: 15px;
  line-height: 1.9;
  color: var(--pa-muted);
  max-width: 62ch;
}

@media (max-width: 719px) {
  .page-about .road-node__body {
    padding-left: 4px;
  }
}

/* ============ 006 做法 ============ */

.page-about .ways-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
}

.page-about .way {
  padding: 22px 0;
  border-top: 2px solid var(--ink);
}

.page-about .way__index {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--orange);
}

.page-about .way__title {
  margin-top: 10px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(20px, 2.4vw, 26px);
  color: var(--ink);
}

.page-about .way__text {
  margin-top: 12px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--pa-muted-ink);
}

.page-about .ways-cta {
  margin-top: clamp(30px, 4vw, 52px);
  padding-top: 24px;
  border-top: 1px solid var(--pa-rule-ink);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.page-about .ways-cta p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--pa-muted-ink);
  max-width: 56ch;
}

@media (min-width: 860px) {
  .page-about .ways-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .way {
    padding: 24px clamp(20px, 2.6vw, 38px) 0;
  }

  .page-about .way:first-child {
    padding-left: 0;
  }

  .page-about .way:last-child {
    padding-right: 0;
  }
}

/* ============ 尾段 ============ */

.page-about .about-next {
  border-top: var(--rail) solid var(--asphalt);
  padding: clamp(40px, 6vw, 84px) 0 clamp(56px, 8vw, 110px);
  background:
    radial-gradient(circle at 12% 10%, rgba(224, 169, 59, 0.14), transparent 58%),
    var(--indigo);
}

.page-about .about-next__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3vw, 40px);
  align-items: end;
}

.page-about .about-next__kicker {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--orange);
  margin-bottom: 12px;
}

.page-about .about-next h2 {
  font-size: clamp(24px, 3.6vw, 40px);
  color: var(--fog);
  max-width: 22ch;
}

.page-about .about-next__lede {
  margin-top: 16px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--pa-muted);
  max-width: 58ch;
}

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

@media (min-width: 900px) {
  .page-about .about-next__inner {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
    align-items: center;
  }

  .page-about .about-next__actions {
    justify-content: flex-end;
  }
}