.page-about {
  --cut: 16px;
  --about-line: rgba(23, 224, 200, 0.34);
  display: block;
  padding-bottom: 72px;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumbs {
  margin: 22px 0 30px;
}

/* ---------- 首屏 ---------- */
.page-about .about-masthead {
  position: relative;
  padding: 8px 0 46px;
  background:
    radial-gradient(120% 90% at 88% -10%, rgba(23, 224, 200, 0.14), transparent 58%),
    radial-gradient(80% 70% at 4% 104%, rgba(255, 106, 43, 0.12), transparent 62%);
}
.page-about .about-masthead__inner {
  display: grid;
  gap: 20px;
}
.page-about .about-h1 {
  margin: 0;
  font-size: clamp(30px, 8.4vw, 74px);
  line-height: 1.05;
  letter-spacing: 0.01em;
  text-transform: none;
  color: var(--paper);
  font-weight: 700;
}
.page-about .about-h1 em {
  font-style: normal;
  color: var(--cyan);
}
.page-about .about-masthead__body {
  display: grid;
  gap: 14px;
}
.page-about .about-lead {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--ink-72);
}
.page-about .about-lead--sub {
  padding-left: 14px;
  border-left: 2px solid var(--hair-strong);
  color: var(--ink-50);
  font-size: 15px;
}

.page-about .about-tally {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--hair);
  border: 1px solid var(--hair);
}
.page-about .tally-item {
  display: grid;
  gap: 4px;
  padding: 14px 14px 16px;
  background: var(--ink);
  border-top: 2px solid var(--cyan-deep);
}
.page-about .tally-item--hot {
  border-top-color: var(--orange);
}
.page-about .tally-num {
  font-size: clamp(26px, 7vw, 38px);
  line-height: 1;
  color: var(--cyan);
  letter-spacing: -0.02em;
}
.page-about .tally-item--hot .tally-num {
  color: var(--orange);
}
.page-about .tally-label {
  font-size: 14px;
  color: var(--paper);
}
.page-about .tally-note {
  font-size: 12px;
  color: var(--ink-50);
}

/* ---------- 通用小标题 ---------- */
.page-about .about-head {
  margin-bottom: 26px;
}
.page-about .about-head .section-kicker {
  color: var(--cyan);
  letter-spacing: 0.18em;
}
.page-about .about-head__note {
  margin: 10px 0 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-50);
}
.page-about .about-head__note a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.page-about .about-head__note a:hover {
  color: var(--paper);
}

/* ---------- 三条准绳 ---------- */
.page-about .about-creed {
  padding: 8px 0 44px;
}
.page-about .creed-grid {
  display: grid;
  gap: 18px;
}
.page-about .creed-card {
  position: relative;
  padding: 22px 20px 24px;
  background: linear-gradient(160deg, var(--panel), #0D2135 78%);
  border: 1px solid var(--hair);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
}
.page-about .creed-card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 84px;
  height: 3px;
  background: var(--cyan);
}
.page-about .creed-card--hot::after {
  background: var(--orange);
}
.page-about .creed-num {
  margin: 0 0 10px;
  font-size: 30px;
  line-height: 1;
  color: var(--cyan-deep);
  letter-spacing: 0.04em;
}
.page-about .creed-card--hot .creed-num {
  color: var(--orange-soft);
}
.page-about .creed-title {
  margin: 0 0 10px;
  font-size: 20px;
  line-height: 1.4;
  color: var(--paper);
}
.page-about .creed-text {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-72);
}
.page-about .creed-proof {
  margin: 0;
  padding-top: 12px;
  border-top: 1px solid var(--hair);
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-50);
  display: grid;
  gap: 6px;
}

/* ---------- 横幅图 ---------- */
.page-about .about-banner-wrap {
  padding: 0 0 48px;
}
.page-about .about-banner {
  margin: 0;
}
.page-about .about-banner .figure__media img,
.page-about .team-figure .figure__media img,
.page-about .region-figure .figure__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ---------- 四步流程 ---------- */
.page-about .about-flow {
  padding: 0 0 56px;
}
.page-about .flow-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.page-about .flow-item {
  position: relative;
}
.page-about .flow-item::before {
  content: "";
  position: absolute;
  left: 21px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--hair-strong);
}
.page-about .flow-item:last-child::before {
  bottom: 50%;
}
.page-about .flow-step {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--hair);
  border-left: 3px solid var(--cyan-deep);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
}
.page-about .flow-item--hot .flow-step {
  border-left-color: var(--orange);
}
.page-about .flow-step > summary {
  display: grid;
  grid-template-columns: 52px 1fr;
  grid-template-areas:
    "idx name"
    "idx role";
  align-items: center;
  gap: 2px 10px;
  padding: 16px 18px 16px 0;
  cursor: pointer;
  list-style: none;
}
.page-about .flow-step > summary::-webkit-details-marker {
  display: none;
}
.page-about .flow-step > summary::after {
  content: "＋";
  position: absolute;
  right: 16px;
  top: 16px;
  font-size: 14px;
  color: var(--cyan);
  line-height: 1;
}
.page-about .flow-step[open] > summary::after {
  content: "－";
}
.page-about .flow-idx {
  grid-area: idx;
  display: flex;
  align-items: center;
  justify-content: center;
  align-self: stretch;
  font-size: 18px;
  color: var(--cyan);
  border-right: 1px solid var(--hair);
  margin-right: 8px;
}
.page-about .flow-item--hot .flow-idx {
  color: var(--orange);
}
.page-about .flow-name {
  grid-area: name;
  font-size: 18px;
  font-weight: 700;
  color: var(--paper);
}
.page-about .flow-role {
  grid-area: role;
  font-size: 13px;
  color: var(--ink-50);
}
.page-about .flow-body {
  padding: 0 18px 18px 70px;
  border-top: 1px solid var(--hair);
  padding-top: 14px;
  margin-left: 0;
}
.page-about .flow-body p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink-72);
}
.page-about .flow-body p:last-child {
  margin-bottom: 0;
}
.page-about .flow-out {
  display: grid;
  gap: 6px;
  align-items: start;
}
.page-about .flow-out .mono {
  color: var(--paper);
  font-size: 14px;
}
.page-about .flow-tempo {
  margin: 22px 0 0;
  padding: 14px 16px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-72);
  background: var(--cyan-a12);
  border-left: 3px solid var(--cyan);
}
.page-about .flow-tempo .mono {
  color: var(--cyan);
}

/* ---------- 斜向时间轴 ---------- */
.page-about .about-axis {
  padding: 0 0 56px;
}
.page-about .axis-list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 6px 0 6px 0;
  display: grid;
  gap: 10px;
}
.page-about .axis-list::before {
  content: "";
  position: absolute;
  left: 12px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--cyan-deep) 46%, var(--orange) 100%);
  opacity: 0.55;
}
.page-about .axis-item {
  position: relative;
}
.page-about .axis-node {
  background: linear-gradient(150deg, rgba(18, 42, 66, 0.96), rgba(11, 27, 43, 0.96));
  border: 1px solid var(--hair);
  border-left: 4px solid var(--cyan-deep);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
}
.page-about .axis-item--now .axis-node {
  border-left-color: var(--orange);
}
.page-about .axis-node > summary {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: baseline;
  gap: 10px;
  padding: 14px 40px 14px 16px;
  cursor: pointer;
  list-style: none;
  position: relative;
}
.page-about .axis-node > summary::-webkit-details-marker {
  display: none;
}
.page-about .axis-node > summary::after {
  content: "▸";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 13px;
  color: var(--ink-50);
}
.page-about .axis-node[open] > summary::after {
  content: "▾";
  color: var(--cyan);
}
.page-about .axis-ver {
  font-size: 15px;
  color: var(--cyan);
  letter-spacing: 0.04em;
}
.page-about .axis-item--now .axis-ver {
  color: var(--orange);
}
.page-about .axis-name {
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
}
.page-about .axis-era {
  font-size: 13px;
  color: var(--ink-50);
}
.page-about .axis-body {
  padding: 0 18px 16px 16px;
  border-top: 1px solid var(--hair);
  padding-top: 12px;
}
.page-about .axis-body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink-72);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding: 0 0 56px;
}
.page-about .team-layout {
  display: grid;
  gap: 22px;
}
.page-about .team-figure {
  margin: 0;
  max-width: 340px;
}
.page-about .team-tablescroll {
  overflow-x: auto;
  border: 1px solid var(--hair);
}
.page-about .team-table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
  font-size: 14px;
}
.page-about .team-caption {
  caption-side: top;
  text-align: left;
  padding: 12px 14px;
  font-size: 13px;
  color: var(--ink-50);
  background: rgba(5, 13, 22, 0.6);
  border-bottom: 1px solid var(--hair);
}
.page-about .team-table th,
.page-about .team-table td {
  text-align: left;
  vertical-align: top;
  padding: 13px 14px;
  border-bottom: 1px solid var(--hair);
  line-height: 1.7;
  color: var(--ink-72);
}
.page-about .team-table thead th {
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
  background: rgba(18, 42, 66, 0.7);
}
.page-about .team-table tbody th {
  color: var(--paper);
  font-size: 15px;
  white-space: nowrap;
}
.page-about .team-table .mono {
  color: var(--cyan);
}
.page-about .team-table tbody tr:hover td,
.page-about .team-table tbody tr:hover th {
  background: rgba(23, 224, 200, 0.05);
}
.page-about .team-table tbody tr:last-child th,
.page-about .team-table tbody tr:last-child td {
  border-bottom: 0;
}

/* ---------- 地域标识 ---------- */
.page-about .about-region {
  padding: 0 0 56px;
}
.page-about .region-figure {
  margin: 0 0 26px;
}
.page-about .region-rules {
  display: grid;
  gap: 1px;
  background: var(--hair);
  border: 1px solid var(--hair);
}
.page-about .region-rule {
  padding: 20px 18px;
  background: var(--ink);
  border-left: 2px solid var(--stone);
}
.page-about .region-rule h3 {
  margin: 0 0 10px;
  font-size: 17px;
  color: var(--paper);
  letter-spacing: 0.02em;
}
.page-about .region-rule p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink-72);
}

/* ---------- 引用与许可 ---------- */
.page-about .about-license {
  padding: 0 0 20px;
}
.page-about .license-layout {
  display: grid;
  gap: 16px;
}
.page-about .license-block {
  padding: 20px 18px;
  background: var(--panel);
  border-top: 3px solid var(--cyan);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
}
.page-about .license-block--deny {
  border-top-color: var(--orange);
}
.page-about .license-sub {
  margin: 0 0 12px;
  font-size: 16px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}
.page-about .license-block--deny .license-sub {
  color: var(--orange);
}
.page-about .license-list {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 8px;
}
.page-about .license-list li {
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-72);
}
.page-about .license-list li::marker {
  color: var(--ink-50);
}

.page-about .cite-box {
  margin-top: 24px;
  padding: 20px 18px;
  background: var(--plate);
  border: 1px solid var(--hair-strong);
  border-left: 3px solid var(--verify);
}
.page-about .cite-label {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--verify);
}
.page-about .cite-code {
  margin: 0;
  padding: 14px 14px;
  overflow-x: auto;
  background: rgba(11, 27, 43, 0.85);
  border: 1px solid var(--hair);
}
.page-about .cite-code code {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.9;
  color: var(--paper);
  white-space: pre;
}
.page-about .cite-note {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-50);
}

.page-about .about-cta {
  margin-top: 30px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 焦点可见性 ---------- */
.page-about summary:focus-visible,
.page-about a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 720px) {
  .page-about {
    padding-bottom: 88px;
  }
  .page-about .about-tally {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .creed-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .creed-card:first-child {
    grid-column: span 2;
  }
  .page-about .region-rules {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .license-layout {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .team-layout {
    grid-template-columns: 280px minmax(0, 1fr);
    align-items: start;
  }
  .page-about .about-masthead {
    padding-bottom: 58px;
  }
  .page-about .flow-step > summary {
    grid-template-columns: 64px 1fr auto;
    grid-template-areas: "idx name role";
    padding: 18px 44px 18px 0;
  }
  .page-about .flow-role {
    text-align: right;
    padding-right: 8px;
  }
  .page-about .flow-body {
    padding-left: 90px;
  }
}

/* ---------- 桌面：斜向时间轴与三列准绳 ---------- */
@media (min-width: 1000px) {
  .page-about .creed-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .creed-card:first-child {
    grid-column: span 1;
  }
  .page-about .about-masthead__inner {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    grid-template-areas:
      "kicker kicker"
      "title  body"
      "tally  tally";
    gap: 22px 24px;
    align-items: start;
  }
  .page-about .about-masthead .section-kicker {
    grid-area: kicker;
  }
  .page-about .about-h1 {
    grid-area: title;
  }
  .page-about .about-masthead__body {
    grid-area: body;
    padding-top: 6px;
  }
  .page-about .about-tally {
    grid-area: tally;
    margin-top: 6px;
  }

  /* 轴：轨迹倾斜、节点依次右移 */
  .page-about .axis-list {
    padding-top: 10px;
    padding-bottom: 10px;
    gap: 14px;
  }
  .page-about .axis-list::before {
    left: 26px;
    top: 8px;
    bottom: 8px;
    width: 2px;
    transform: skewX(14deg);
    transform-origin: top left;
    opacity: 0.7;
  }
  .page-about .axis-item:nth-child(1) { --i: 0; }
  .page-about .axis-item:nth-child(2) { --i: 1; }
  .page-about .axis-item:nth-child(3) { --i: 2; }
  .page-about .axis-item:nth-child(4) { --i: 3; }
  .page-about .axis-item:nth-child(5) { --i: 4; }
  .page-about .axis-item:nth-child(6) { --i: 5; }
  .page-about .axis-item {
    padding-left: calc(26px + var(--i) * 35px);
    width: calc(100% - 26px - 5 * 35px);
  }
  .page-about .axis-item:nth-child(even) .axis-node {
    border-left-color: var(--cyan);
  }
  .page-about .axis-item--now .axis-node {
    border-left-color: var(--orange);
  }
  .page-about .axis-node > summary {
    padding-right: 44px;
  }
}

@media (min-width: 1240px) {
  .page-about .creed-grid {
    gap: 22px;
  }
  .page-about .about-h1 {
    font-size: clamp(46px, 5.4vw, 74px);
  }
}

/* ---------- 降低动态偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .axis-list::before {
    transform: none;
  }
  .page-about .axis-item {
    padding-left: 26px;
    width: 100%;
  }
}
<<<END>>>