.page-about {
  --about-radius: 14px;
  --about-pad: clamp(18px, 2.4vw, 28px);
}

.page-about .about-crumb {
  padding-top: clamp(88px, 11vw, 124px);
}

.page-about .about-crumb .breadcrumb {
  margin-bottom: clamp(20px, 3vw, 32px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: 0;
}

.page-about .hero-grid {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
  align-items: end;
}

.page-about .hero-lead h1 {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
  font-size: clamp(30px, 5.2vw, 56px);
  color: var(--text-strong);
  max-width: 22ch;
}

.page-about .hero-sub {
  margin: 20px 0 0;
  font-size: clamp(16px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--text);
  max-width: 46ch;
}

.page-about .hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  overflow: hidden;
  box-shadow: var(--shadow-stack);
}

.page-about .hero-stats .stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 16px;
  background: var(--panel);
}

.page-about .hero-stats .stat-value {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  color: var(--text-strong);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

.page-about .hero-stats .stat-value--accent {
  color: var(--cyan);
}

.page-about .hero-stats .stat-label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-dim);
}

@media (min-width: 1000px) {
  .page-about .hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
}

/* ---------- 起点 ---------- */
.page-about .about-origin .prose h2 {
  margin: 10px 0 18px;
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.18;
  font-size: clamp(26px, 3.6vw, 40px);
  color: var(--text-strong);
}

.page-about .about-origin .prose p {
  margin: 0 0 16px;
  color: var(--text);
}

.page-about .note-title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 15px;
  color: var(--text-strong);
}

.page-about .note p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-about .note-title {
  margin: 0 0 8px;
}

/* ---------- 版本演进 ---------- */
.page-about .about-versions .section-head {
  margin-bottom: clamp(24px, 3vw, 36px);
}

.page-about .ver-banner {
  margin: 0 0 clamp(24px, 3.5vw, 40px);
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  overflow: hidden;
  background: linear-gradient(160deg, var(--ink-800), var(--ink-900));
}

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

.page-about .ver-banner .media-caption {
  padding: 12px 16px 14px;
}

.page-about .ver-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .ver-node {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 20px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  box-shadow: var(--shadow-stack);
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-about .ver-node:hover {
  border-color: rgba(47, 230, 200, 0.45);
  transform: translateY(-2px);
}

.page-about .ver-tag {
  align-self: flex-start;
  padding: 3px 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--cyan);
  background: rgba(47, 230, 200, 0.07);
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
}

.page-about .ver-node:last-child .ver-tag {
  color: var(--orange);
  background: rgba(255, 122, 47, 0.08);
  border-color: rgba(255, 122, 47, 0.3);
}

.page-about .ver-name {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  letter-spacing: -0.01em;
  font-size: clamp(18px, 2vw, 20px);
  color: var(--text-strong);
}

.page-about .ver-text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text);
}

.page-about .ver-more {
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.page-about .ver-more summary {
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--ice);
  list-style: none;
}

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

.page-about .ver-more summary::after {
  content: " +";
}

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

.page-about .ver-more ul {
  margin: 10px 0 0;
  padding-left: 16px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--text-dim);
}

.page-about .ver-more li {
  margin-bottom: 6px;
}

@media (min-width: 960px) {
  .page-about .ver-list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
    align-items: stretch;
  }
}

/* ---------- 团队 ---------- */
.page-about .about-team .section-head {
  margin-bottom: clamp(24px, 3vw, 36px);
}

.page-about .team-panel {
  padding: var(--about-pad);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  box-shadow: var(--shadow-stack);
}

.page-about .team-panel-head {
  margin-bottom: 24px;
}

.page-about .team-panel-head h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(18px, 2vw, 22px);
  color: var(--text-strong);
}

.page-about .team-panel-head p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-dim);
}

.page-about .team-rows {
  display: grid;
  gap: 16px;
}

.page-about .team-row {
  display: grid;
  grid-template-columns: minmax(96px, 7.5rem) minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
}

.page-about .team-row-label {
  font-size: 14px;
  color: var(--text);
}

.page-about .team-row-track {
  display: block;
  height: 12px;
  border-radius: var(--radius-pill);
  background: var(--ink-750);
  border: 1px solid var(--line);
  overflow: hidden;
}

.page-about .team-row-fill {
  display: block;
  height: 100%;
  width: var(--w, 50%);
  border-radius: var(--radius-pill);
  background: var(--cyan);
  transition: width 0.6s var(--ease);
}

.page-about .team-row:nth-child(1) .team-row-fill {
  background: var(--cyan);
}

.page-about .team-row:nth-child(2) .team-row-fill {
  background: var(--orange);
}

.page-about .team-row:nth-child(3) .team-row-fill {
  background: var(--ice);
}

.page-about .team-row:nth-child(4) .team-row-fill {
  background: var(--warm);
}

.page-about .team-row:hover .team-row-label {
  color: var(--cyan);
}

.page-about .team-row:hover .team-row-track {
  border-color: rgba(47, 230, 200, 0.5);
}

.page-about .team-row-num {
  min-width: 3.2rem;
  text-align: right;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--text-strong);
  font-variant-numeric: tabular-nums;
}

.page-about .team-band {
  margin: clamp(24px, 3.5vw, 40px) 0 0;
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  overflow: hidden;
  background: var(--ink-750);
}

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

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

.page-about .team-notes {
  margin-top: clamp(24px, 3.5vw, 36px);
}

.page-about .team-notes .prose p {
  margin: 0;
  color: var(--text);
}

@media (max-width: 560px) {
  .page-about .team-row {
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas:
      "label num"
      "track track";
    row-gap: 8px;
  }

  .page-about .team-row-label {
    grid-area: label;
  }

  .page-about .team-row-num {
    grid-area: num;
  }

  .page-about .team-row-track {
    grid-area: track;
  }
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco .section-head {
  margin-bottom: clamp(20px, 2.6vw, 28px);
}

.page-about .eco-layout {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
}

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

.page-about .eco-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 16px 16px 18px;
  background: var(--ink-750);
  border: 1px solid var(--line);
  border-left: 2px solid var(--line);
  border-radius: var(--radius-s);
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-about .eco-card:hover {
  border-left-color: var(--cyan);
  transform: translateY(-2px);
}

.page-about .eco-card .eco-title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 15px;
  color: var(--text-strong);
}

.page-about .eco-card .eco-desc {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--text-dim);
}

.page-about .eco-card .chip {
  align-self: flex-start;
  margin-top: 2px;
}

.page-about .eco-side {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-about .eco-figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  overflow: hidden;
  background: var(--ink-750);
}

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

.page-about .eco-note {
  padding: 18px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
}

.page-about .eco-note--cert {
  border-color: rgba(47, 230, 200, 0.28);
  background: linear-gradient(150deg, rgba(47, 230, 200, 0.07), var(--panel) 62%);
}

.page-about .eco-note h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 16px;
  color: var(--text-strong);
}

.page-about .eco-note p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--text-dim);
}

@media (min-width: 620px) {
  .page-about .eco-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-about .eco-layout {
    grid-template-columns: minmax(0, 1fr) 340px;
    align-items: start;
  }
}

/* ---------- 服务对象 ---------- */
.page-about .about-audience .section-head {
  margin-bottom: clamp(22px, 2.8vw, 32px);
}

.page-about .audience-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-bottom: clamp(28px, 4vw, 48px);
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  overflow: hidden;
}

.page-about .audience-stats .stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px 18px;
  background: var(--panel);
}

.page-about .audience-stats .stat-value {
  font-family: var(--font-mono);
  font-size: clamp(22px, 2.8vw, 30px);
  font-weight: 700;
  line-height: 1;
  color: var(--text-strong);
  font-variant-numeric: tabular-nums;
}

.page-about .audience-stats .stat-value--signal {
  color: var(--orange);
}

.page-about .audience-stats .stat-label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-dim);
}

.page-about .about-audience .prose p {
  margin: 0 0 16px;
  color: var(--text);
}

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

@media (min-width: 820px) {
  .page-about .audience-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 长期投入 ---------- */
.page-about .commit-layout {
  display: grid;
  gap: clamp(24px, 3.5vw, 40px);
}

.page-about .commit-lead h2 {
  margin: 10px 0 18px;
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.18;
  font-size: clamp(26px, 3.4vw, 38px);
  color: var(--text-strong);
}

.page-about .commit-lead p {
  margin: 0;
  color: var(--text);
}

.page-about .commit-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  overflow: hidden;
}

.page-about .commit-item {
  display: grid;
  grid-template-columns: minmax(4.5rem, auto) minmax(0, 1fr);
  gap: 16px;
  align-items: baseline;
  padding: 18px;
  background: var(--panel);
}

.page-about .commit-num {
  font-family: var(--font-mono);
  font-size: clamp(17px, 2.2vw, 24px);
  font-weight: 700;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.page-about .commit-item h3 {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 15.5px;
  color: var(--text-strong);
}

.page-about .commit-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-dim);
}

@media (min-width: 900px) {
  .page-about .commit-layout {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }
}

/* ---------- 收尾入口 ---------- */
.page-about .next-panel {
  padding: var(--about-pad);
  background: linear-gradient(155deg, rgba(47, 230, 200, 0.08), var(--panel) 46%, var(--ink-750));
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  box-shadow: var(--shadow-stack);
}

.page-about .next-panel h2 {
  margin: 10px 0 12px;
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
  font-size: clamp(22px, 3vw, 32px);
  color: var(--text-strong);
}

.page-about .next-sub {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text);
}

.page-about .next-grid {
  list-style: none;
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .next-grid .index-card {
  padding: 18px;
  background: rgba(7, 19, 15, 0.55);
  border: 1px solid var(--line);
  border-radius: var(--radius-s);
}

.page-about .next-link {
  display: inline-block;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 16px;
  color: var(--ice);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

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

.page-about .next-grid .index-card-desc {
  margin: 10px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--text-dim);
}

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

@media (min-width: 1040px) {
  .page-about .next-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

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

.page-about {
  --w: 1rem;
}