.page-about {
  --about-rule: rgba(217, 185, 140, .26);
  --about-rule-soft: rgba(217, 185, 140, .14);
  background: var(--ink);
  color: var(--text-soft);
  overflow-x: clip;
  padding-bottom: clamp(40px, 6vw, 72px);
}

.page-about .about-crumb {
  padding-top: clamp(16px, 3vw, 30px);
}

.page-about .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  margin-right: 10px;
  color: var(--sand);
}

.page-about .breadcrumb-list a {
  color: var(--text-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .18s var(--ease), color .18s var(--ease);
}

.page-about .breadcrumb-list a:hover,
.page-about .breadcrumb-list a:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

/* ---------- 首屏档案封面 ---------- */
.page-about .about-hero {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  padding-top: clamp(24px, 4vw, 48px);
  padding-bottom: clamp(40px, 6vw, 80px);
}

.page-about .about-hero-cover {
  position: relative;
  min-width: 0;
}

.page-about .cover-frame {
  margin: 0;
  border: 1px solid var(--line-strong);
  box-shadow: var(--sheet-shadow);
  background: var(--night);
}

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

.page-about .cover-tabs {
  position: relative;
  z-index: 2;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: -12px 0 0;
  padding: 0 0 0 12px;
  list-style: none;
}

.page-about .cover-tabs .tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .04em;
}

.page-about .about-hero-copy {
  min-width: 0;
}

.page-about .about-hero-copy h1 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 7vw, 58px);
  line-height: 1.1;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-about .hero-hl {
  display: inline-block;
  padding: 0 .12em;
  color: var(--orange);
  border-bottom: 4px solid var(--lime);
}

.page-about .about-hero-copy .lead {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  max-width: 38em;
  font-size: clamp(15px, 1.7vw, 18px);
  line-height: 1.8;
  color: var(--text-soft);
}

.page-about .hero-meta {
  display: grid;
  gap: 1px;
  margin: clamp(22px, 3vw, 34px) 0 0;
  background: var(--about-rule-soft);
  border-top: 1px solid var(--about-rule);
}

.page-about .hero-meta > div {
  padding: 14px 0 0;
  background: var(--ink);
}

.page-about .hero-meta dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--sand);
}

.page-about .hero-meta dd {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--paper);
}

/* ---------- 区块底色 ---------- */
.page-about .band-night,
.page-about .band-paper,
.page-about .band-darkline {
  padding: clamp(44px, 7vw, 92px) 0;
}

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

.page-about .band-darkline {
  background:
    linear-gradient(180deg, var(--ink) 0%, var(--night) 100%);
  border-top: 1px solid var(--about-rule);
  border-bottom: 1px solid var(--about-rule);
}

.page-about .band-paper {
  background: var(--paper);
  color: var(--black);
}

.page-about .band-paper .section-title,
.page-about .band-paper h3 {
  color: var(--ink);
}

.page-about .band-paper .eyebrow {
  color: var(--orange);
}

.page-about .section-title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 4.4vw, 40px);
  line-height: 1.18;
  letter-spacing: -.01em;
  color: var(--paper);
}

/* ---------- 品牌起点 ---------- */
.page-about .origin-grid {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
}

.page-about .origin-lead p {
  max-width: 40em;
  margin: 16px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-soft);
}

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

.page-about .origin-item {
  position: relative;
  min-width: 0;
  padding: 18px 18px 18px 20px;
  background: var(--ink);
  border: 1px solid var(--about-rule);
  box-shadow: 5px 5px 0 -1px rgba(217, 185, 140, .12);
  transition: transform .2s var(--ease), box-shadow .2s var(--ease);
}

.page-about .origin-item:hover {
  transform: translate(-2px, -2px);
  box-shadow: 8px 8px 0 -1px rgba(217, 185, 140, .18);
}

.page-about .origin-idx {
  display: inline-block;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--lime);
}

.page-about .origin-item h3 {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  line-height: 1.35;
  color: var(--paper);
}

.page-about .origin-item p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 覆盖规模 ---------- */
.page-about .scale-head {
  max-width: 46em;
}

.page-about .scale-intro {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: #43506A;
}

.page-about .stat-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 34px);
  margin-top: clamp(28px, 4vw, 46px);
}

.page-about .stat-card {
  min-width: 0;
  padding-top: 16px;
  border-top: 2px solid var(--sand);
}

.page-about .stat-label {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 15px;
  letter-spacing: .02em;
  color: var(--ink);
}

.page-about .stat-num {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(38px, 6vw, 62px);
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
}

.page-about .stat-plus {
  font-size: .6em;
  color: var(--ink);
}

.page-about .stat-note {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: #43506A;
}

.page-about .stat-foot {
  margin-top: clamp(26px, 4vw, 40px);
  padding-top: 20px;
  border-top: 1px solid rgba(10, 10, 10, .12);
}

.page-about .stat-foot-text {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  letter-spacing: .01em;
  color: var(--ink);
}

.page-about .stat-sports {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .stat-sports li {
  padding: 5px 10px;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--ink);
  background: var(--mist);
  border: 1px solid rgba(11, 27, 51, .18);
}

/* ---------- 服务对象 ---------- */
.page-about .audience-head .lead {
  margin: 14px 0 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .audience-grid {
  display: grid;
  gap: 14px;
  margin-top: clamp(26px, 4vw, 44px);
}

.page-about .audience-card {
  min-width: 0;
  padding: clamp(20px, 3vw, 28px);
  background: var(--ink);
  border: 1px solid var(--about-rule);
  border-left: 3px solid var(--lime);
  transition: border-left-color .2s var(--ease), transform .2s var(--ease);
}

.page-about .audience-card:nth-child(2) {
  border-left-color: var(--orange);
}

.page-about .audience-card:nth-child(3) {
  border-left-color: var(--sand);
}

.page-about .audience-card:hover {
  transform: translateY(-3px);
}

.page-about .audience-kicker {
  margin: 0;
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--muted);
}

.page-about .audience-card h3 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  line-height: 1.35;
  color: var(--paper);
}

.page-about .audience-card p:last-child {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-soft);
}

/* ---------- 内容方法 ---------- */
.page-about .method-grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-about .method-figure {
  margin: 0;
  border: 1px solid rgba(11, 27, 51, .28);
  box-shadow: 8px 8px 0 -1px rgba(217, 185, 140, .55);
  background: var(--mist);
}

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

.page-about .method-copy {
  min-width: 0;
}

.page-about .method-copy > p {
  margin: 14px 0 0;
  max-width: 38em;
  font-size: 15px;
  line-height: 1.8;
  color: #43506A;
}

.page-about .flow-list {
  display: grid;
  gap: 12px;
  margin: clamp(22px, 3vw, 30px) 0 0;
  padding: 0;
  list-style: none;
  counter-reset: flow;
}

.page-about .flow-list li {
  display: grid;
  grid-template-columns: 30px 1fr;
  gap: 12px;
  min-width: 0;
  padding: 14px 0;
  border-top: 1px solid rgba(10, 10, 10, .12);
}

.page-about .flow-idx {
  font-size: 13px;
  line-height: 1.6;
  letter-spacing: .06em;
  color: var(--orange);
}

.page-about .flow-list h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 16px;
  letter-spacing: .04em;
  color: var(--ink);
}

.page-about .flow-list p {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: #43506A;
}

.page-about .method-foot {
  margin: 20px 0 0;
  padding: 14px 16px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--ink);
  background: rgba(184, 255, 61, .32);
  border-left: 3px solid var(--lime);
}

/* ---------- 团队 ---------- */
.page-about .team-head .lead {
  margin: 14px 0 0;
  max-width: 36em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .team-grid {
  display: grid;
  gap: 14px;
  margin-top: clamp(26px, 4vw, 42px);
}

.page-about .team-card {
  min-width: 0;
  padding: clamp(20px, 3vw, 26px);
  background: var(--ink);
  border: 1px solid var(--about-rule);
  box-shadow: 6px 6px 0 -1px rgba(217, 185, 140, .14);
  transition: transform .2s var(--ease), box-shadow .2s var(--ease);
}

.page-about .team-card:hover,
.page-about .team-card:focus-within {
  transform: translateY(-4px);
  box-shadow: 10px 10px 0 -1px rgba(217, 185, 140, .22);
}

.page-about .team-role {
  margin: 0;
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--lime);
}

.page-about .team-card h3 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  color: var(--paper);
}

.page-about .team-card ul {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .team-card li {
  position: relative;
  padding: 8px 0 8px 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-soft);
  border-top: 1px solid var(--about-rule-soft);
}

.page-about .team-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  width: 6px;
  height: 6px;
  background: var(--orange);
}

.page-about .team-note {
  margin: 22px 0 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--sand);
}

/* ---------- 版本演进 ---------- */
.page-about .timeline-grid {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
}

.page-about .timeline-head p {
  margin: 14px 0 0;
  max-width: 32em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .timeline-link {
  display: inline-block;
  margin-top: 18px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid var(--lime);
  padding-bottom: 3px;
}

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

.page-about .timeline-list {
  position: relative;
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0 0 0 22px;
  list-style: none;
}

.page-about .timeline-list::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--lime), var(--orange), var(--sand));
}

.page-about .timeline-item {
  position: relative;
  min-width: 0;
  display: grid;
  gap: 6px;
  padding: 0 0 clamp(22px, 3vw, 30px);
}

.page-about .timeline-item::before {
  content: "";
  position: absolute;
  left: -22px;
  top: 6px;
  width: 12px;
  height: 12px;
  background: var(--ink);
  border: 2px solid var(--orange);
  border-radius: 50%;
}

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

.page-about .timeline-item:last-child::before {
  background: var(--lime);
  border-color: var(--lime);
}

.page-about .tl-idx {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--sand);
}

.page-about .tl-body h3 {
  margin: 4px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  color: var(--paper);
}

.page-about .tl-body p {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-soft);
}

/* ---------- 合作与荣誉 ---------- */
.page-about .coop-grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-about .coop-frame {
  margin: 0;
  border: 1px solid rgba(11, 27, 51, .28);
  box-shadow: 8px 8px 0 -1px rgba(255, 106, 26, .3);
  background: var(--mist);
}

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

.page-about .coop-copy {
  min-width: 0;
}

.page-about .coop-copy > p {
  margin: 14px 0 0;
  max-width: 38em;
  font-size: 15px;
  line-height: 1.85;
  color: #43506A;
}

.page-about .coop-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .coop-more {
  margin-top: 20px;
  padding-top: 14px;
  border-top: 1px solid rgba(10, 10, 10, .16);
}

.page-about .coop-more summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 6px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--ink);
}

.page-about .coop-more summary::-webkit-details-marker {
  display: none;
}

.page-about .coop-more summary::after {
  content: "+";
  font-size: 20px;
  line-height: 1;
  color: var(--orange);
}

.page-about .coop-more[open] summary::after {
  content: "−";
}

.page-about .coop-more summary:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 3px;
}

.page-about .coop-list {
  display: grid;
  gap: 10px;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .coop-list li {
  padding: 12px 14px;
  font-size: 14px;
  line-height: 1.75;
  color: #43506A;
  background: var(--mist);
  border-left: 3px solid var(--sand);
}

.page-about .coop-list strong {
  color: var(--ink);
}

.page-about .honor-row {
  display: grid;
  gap: 14px;
  margin-top: clamp(30px, 5vw, 52px);
}

.page-about .honor-card {
  min-width: 0;
  padding: clamp(18px, 3vw, 26px);
  background: var(--paper);
  border: 1px solid rgba(10, 10, 10, .22);
  box-shadow: 6px 6px 0 -1px rgba(217, 185, 140, .85);
}

.page-about .honor-kicker {
  margin: 0;
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--orange);
}

.page-about .honor-card h3 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  line-height: 1.4;
  color: var(--ink);
}

.page-about .honor-card p:last-child {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: #43506A;
}

/* ---------- 收束 ---------- */
.page-about .about-next {
  padding: clamp(40px, 6vw, 80px) 0 0;
}

.page-about .about-cta {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
  padding: clamp(26px, 5vw, 52px);
  background: var(--lime);
  color: var(--ink);
  border: 1px solid var(--ink);
  box-shadow: 10px 10px 0 -1px var(--orange);
}

.page-about .cta-eyebrow {
  color: var(--ink);
  opacity: .72;
}

.page-about .about-cta h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(23px, 4vw, 34px);
  line-height: 1.2;
  color: var(--ink);
}

.page-about .about-cta p {
  margin: 12px 0 0;
  max-width: 42em;
  font-size: 14.5px;
  line-height: 1.8;
  color: #23331A;
}

.page-about .cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .cta-btn-dark,
.page-about .cta-btn-line {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 18px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  text-decoration: none;
  border: 1px solid var(--ink);
  transition: transform .18s var(--ease), background-color .18s var(--ease), color .18s var(--ease);
}

.page-about .cta-btn-dark {
  background: var(--ink);
  color: var(--paper);
}

.page-about .cta-btn-line {
  background: transparent;
  color: var(--ink);
}

.page-about .cta-btn-dark:hover,
.page-about .cta-btn-dark:focus-visible {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--ink);
  transform: translateY(-2px);
}

.page-about .cta-btn-line:hover,
.page-about .cta-btn-line:focus-visible {
  background: var(--paper);
  transform: translateY(-2px);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .hero-meta {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
    background: transparent;
    border-top: none;
  }

  .page-about .hero-meta > div {
    padding: 14px 16px 0 0;
    border-top: 1px solid var(--about-rule);
    background: transparent;
  }

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

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

@media (min-width: 960px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }

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

  .page-about .origin-list {
    gap: 16px;
  }

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

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

  .page-about .audience-card:nth-child(2) {
    transform: translateY(14px);
  }

  .page-about .audience-card:nth-child(2):hover {
    transform: translateY(10px);
  }

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

  .page-about .method-figure {
    position: sticky;
    top: 24px;
  }

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

  .page-about .timeline-grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    align-items: start;
  }

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

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

@media (min-width: 1180px) {
  .page-about .about-cta {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .origin-item,
  .page-about .audience-card,
  .page-about .team-card,
  .page-about .cta-btn-dark,
  .page-about .cta-btn-line {
    transition: none;
  }

  .page-about .origin-item:hover,
  .page-about .audience-card:hover,
  .page-about .team-card:hover,
  .page-about .team-card:focus-within,
  .page-about .cta-btn-dark:hover,
  .page-about .cta-btn-line:hover {
    transform: none;
  }
}