.page-about {
  --about-rail-w: 64px;
  --about-gutter: 18px;
  --about-dot: #FF6A1A;
  background: var(--night);
  color: var(--text);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: 24px 0 0;
  background:
    radial-gradient(130% 90% at 82% -10%, rgba(58, 34, 102, 0.9) 0%, rgba(6, 20, 40, 0) 62%),
    radial-gradient(80% 60% at 0% 100%, rgba(11, 60, 60, 0.55) 0%, rgba(6, 20, 40, 0) 70%),
    var(--night);
}

.page-about .about-hero-inner {
  padding-bottom: 6px;
}

.page-about .hero-frame {
  position: relative;
  margin-top: 16px;
  border: 3px solid var(--line-strong);
  background: linear-gradient(158deg, rgba(14, 42, 79, 0.94) 0%, rgba(6, 20, 40, 0.97) 68%, rgba(58, 34, 102, 0.6) 100%);
  box-shadow: var(--shadow-hard);
}

.page-about .hero-frame::before,
.page-about .hero-frame::after {
  content: "";
  position: absolute;
  width: 22px;
  height: 22px;
  border: 3px solid var(--orange);
  pointer-events: none;
}

.page-about .hero-frame::before {
  top: -3px;
  left: -3px;
  border-right: 0;
  border-bottom: 0;
}

.page-about .hero-frame::after {
  right: -3px;
  bottom: -3px;
  border-left: 0;
  border-top: 0;
}

.page-about .hero-frame-body {
  display: grid;
  gap: 26px;
  padding: 26px 20px 30px;
}

.page-about .hero-copy h1 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: 32px;
  line-height: 1.16;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--text);
}

.page-about .hero-lede {
  margin: 16px 0 0;
  font-family: var(--font-editorial);
  font-size: 17px;
  line-height: 1.7;
  color: var(--text);
}

.page-about .hero-lede--second {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.78;
  color: var(--muted);
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .hero-side {
  border: 3px solid var(--line);
  background: rgba(4, 14, 28, 0.66);
  box-shadow: 6px 6px 0 rgba(2, 8, 18, 0.6);
  padding: 16px 16px 8px;
}

.page-about .hero-side-label {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--orange-soft);
}

.page-about .hero-facts {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .hero-facts li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
}

.page-about .hero-facts li:first-child {
  border-top: 0;
  padding-top: 4px;
}

.page-about .hero-fact-num {
  flex: 0 0 auto;
  min-width: 62px;
  font-size: 23px;
  font-weight: 700;
  color: var(--mint);
  letter-spacing: -0.02em;
}

.page-about .hero-fact-text {
  font-size: 14px;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .hero-ruler {
  height: 18px;
  border-top: 3px solid var(--line-strong);
  background-image: repeating-linear-gradient(90deg, var(--orange) 0 2px, transparent 2px 26px);
  background-repeat: repeat-x;
  background-size: auto 9px;
  background-position: 0 0;
  opacity: 0.75;
}

/* ---------- 章节索引 ---------- */
.page-about .about-index {
  margin-top: 26px;
  border-top: 3px solid var(--line);
  border-bottom: 3px solid var(--line);
  background: rgba(4, 14, 28, 0.8);
}

.page-about .about-index-list {
  display: flex;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 10px 0;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-index-list li {
  flex: 0 0 auto;
}

.page-about .about-index-list a {
  display: block;
  padding: 8px 14px;
  border: 2px solid var(--line);
  font-size: 13px;
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-index-list a:hover,
.page-about .about-index-list a:focus-visible {
  border-color: var(--orange);
  background: rgba(255, 106, 26, 0.14);
  transform: translateY(-2px);
}

/* ---------- 通用版块 ---------- */
.page-about .about-section {
  padding: 44px 0;
}

.page-about .about-section--timeline {
  background: linear-gradient(180deg, rgba(11, 60, 60, 0.42) 0%, rgba(6, 20, 40, 0) 78%);
  border-top: 3px solid var(--line);
}

.page-about .about-section--team {
  background: linear-gradient(180deg, rgba(58, 34, 102, 0.46) 0%, rgba(6, 20, 40, 0) 82%);
  border-top: 3px solid var(--line);
}

.page-about .about-section--reach {
  padding: 0;
}

.page-about .about-section .section-head {
  margin-bottom: 22px;
}

.page-about .about-cols {
  display: grid;
  gap: var(--about-gutter);
}

.page-about .about-rail {
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-about .rail-num {
  font-size: 13px;
  font-weight: 700;
  color: var(--orange);
  border: 2px solid var(--orange);
  padding: 3px 8px;
  line-height: 1;
}

.page-about .rail-line {
  flex: 1 1 auto;
  height: 3px;
  background: linear-gradient(90deg, var(--orange) 0%, rgba(255, 106, 26, 0) 100%);
}

.page-about .about-lede {
  margin: 0 0 16px;
  font-family: var(--font-editorial);
  font-size: 18px;
  line-height: 1.72;
  color: var(--text);
}

.page-about .about-body p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--muted);
}

.page-about .about-body p a {
  color: var(--orange-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-points {
  list-style: none;
  margin: 26px 0 22px;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-point {
  border-left: 4px solid var(--orange);
  background: var(--panel);
  padding: 14px 16px;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-point:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hard);
}

.page-about .about-point h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 900;
  letter-spacing: 0.01em;
  color: var(--text);
}

.page-about .about-point p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--muted);
}

.page-about .about-tail {
  font-size: 15px;
  color: var(--muted);
}

/* ---------- 时间线 ---------- */
.page-about .timeline-visual {
  margin: 0 0 30px;
}

.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 22px;
  border-left: 3px solid var(--line-strong);
  display: grid;
  gap: 8px;
}

.page-about .timeline-node {
  position: relative;
  padding: 0 0 26px 4px;
}

.page-about .timeline-node:last-child {
  padding-bottom: 4px;
}

.page-about .timeline-dot {
  position: absolute;
  left: -33px;
  top: 5px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--orange);
  border: 3px solid var(--night);
  box-shadow: 3px 3px 0 rgba(2, 8, 18, 0.72);
  transition: transform var(--dur) var(--ease);
}

.page-about .timeline-node--now .timeline-dot {
  background: var(--mint);
  box-shadow: 0 0 0 4px rgba(34, 230, 168, 0.18), 3px 3px 0 rgba(2, 8, 18, 0.72);
}

.page-about .timeline-node:hover .timeline-dot,
.page-about .timeline-node:focus-within .timeline-dot {
  transform: translateY(-2px);
}

.page-about .timeline-when {
  margin: 0 0 6px;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--mint);
}

.page-about .timeline-title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 19px;
  line-height: 1.35;
  font-weight: 900;
  color: var(--text);
}

.page-about .timeline-node p:not(.timeline-when) {
  margin: 0;
  font-size: 15px;
  line-height: 1.76;
  color: var(--muted);
}

/* ---------- 团队 ---------- */
.page-about .team-banner {
  margin: 0 0 30px;
}

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

.page-about .team-band {
  border: 3px solid rgba(242, 246, 255, 0.28);
  box-shadow: var(--shadow-hard);
  padding: 20px 18px 22px;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .team-band:hover,
.page-about .team-band:focus-within {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lift);
}

.page-about .team-band--wine {
  background: linear-gradient(165deg, rgba(140, 47, 74, 0.92) 0%, rgba(58, 34, 102, 0.7) 100%);
}

.page-about .team-band--teal {
  background: linear-gradient(165deg, rgba(11, 60, 60, 0.95) 0%, rgba(14, 42, 79, 0.85) 100%);
}

.page-about .team-band--violet {
  background: linear-gradient(165deg, rgba(58, 34, 102, 0.95) 0%, rgba(14, 42, 79, 0.8) 100%);
}

.page-about .team-band-label {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--orange-soft);
}

.page-about .team-band-title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 900;
  color: var(--text);
}

.page-about .team-band-desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.74;
  color: rgba(242, 246, 255, 0.86);
}

.page-about .team-band-more {
  margin: 12px 0 0;
  padding-top: 12px;
  border-top: 2px dashed rgba(242, 246, 255, 0.3);
  font-size: 14px;
  line-height: 1.72;
  color: rgba(242, 246, 255, 0.78);
}

/* ---------- 流程 ---------- */
.page-about .flow {
  display: grid;
  gap: 26px;
}

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

.page-about .flow-step {
  position: relative;
  padding-left: 20px;
  border-left: 3px solid var(--line-strong);
}

.page-about .flow-step::before {
  content: "";
  position: absolute;
  left: -8px;
  top: 26px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--orange);
  border: 3px solid var(--night);
}

.page-about .flow-step summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border: 3px solid var(--line);
  background: var(--panel);
  box-shadow: 6px 6px 0 rgba(2, 8, 18, 0.6);
  cursor: pointer;
  list-style: none;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .flow-step summary::-webkit-details-marker {
  display: none;
}

.page-about .flow-step summary::marker {
  content: "";
}

.page-about .flow-step summary:hover,
.page-about .flow-step summary:focus-visible {
  transform: translateY(-2px);
  border-color: var(--orange);
  box-shadow: 8px 8px 0 rgba(2, 8, 18, 0.82);
}

.page-about .flow-step summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--mint);
}

.page-about .flow-step details[open] summary {
  border-color: var(--orange);
  background: var(--panel-2);
}

.page-about .flow-step details[open] summary::after {
  content: "–";
  color: var(--orange-soft);
}

.page-about .flow-num {
  font-size: 13px;
  font-weight: 700;
  color: var(--ink);
  background: var(--orange);
  padding: 3px 7px;
  line-height: 1.1;
}

.page-about .flow-name {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 900;
  color: var(--text);
}

.page-about .flow-when {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mint);
  border: 1px solid rgba(34, 230, 168, 0.42);
  padding: 2px 8px;
}

.page-about .flow-body {
  padding: 12px 14px 14px;
  border: 3px solid var(--line);
  border-top: 0;
  background: rgba(4, 14, 28, 0.72);
}

.page-about .flow-body p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.74;
  color: var(--muted);
}

.page-about .flow-duration {
  margin: 0;
  font-size: 13px;
  color: var(--orange-soft);
}

.page-about .flow-figure {
  margin: 0;
  aspect-ratio: 5 / 4;
}

/* ---------- 覆盖 ---------- */
.page-about .about-section--reach .band {
  padding: 44px 0;
}

.page-about .reach-grid {
  display: grid;
  gap: 14px;
}

.page-about .reach-item {
  border: 3px solid rgba(242, 246, 255, 0.24);
  background: rgba(4, 14, 28, 0.42);
  padding: 18px 16px 20px;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .reach-item:hover {
  transform: translateY(-3px);
  border-color: var(--orange);
  box-shadow: var(--shadow-hard);
}

.page-about .reach-num {
  margin: 0 0 8px;
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--mint);
}

.page-about .reach-title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 900;
  color: var(--text);
}

.page-about .reach-item p:not(.reach-num) {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: rgba(242, 246, 255, 0.82);
}

/* ---------- 合作 ---------- */
.page-about .partner-links {
  display: grid;
  gap: 12px;
  margin: 22px 0;
}

.page-about .partner-card {
  display: block;
  border: 3px solid var(--line);
  background: var(--panel);
  padding: 16px 18px;
  text-decoration: none;
  color: var(--text);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .partner-card:hover,
.page-about .partner-card:focus-visible {
  transform: translateY(-3px);
  border-color: var(--orange);
  box-shadow: var(--shadow-hard);
}

.page-about .partner-card-label {
  display: block;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--orange-soft);
  margin-bottom: 6px;
}

.page-about .partner-card-title {
  display: block;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 900;
  margin-bottom: 6px;
}

.page-about .partner-card-note {
  display: block;
  font-size: 14px;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .about-cta {
  border: 3px dashed var(--line-strong);
  background: rgba(58, 34, 102, 0.35);
  padding: 20px 18px;
}

.page-about .about-cta p {
  margin: 0 0 16px;
  font-family: var(--font-editorial);
  font-size: 17px;
  line-height: 1.7;
  color: var(--text);
}

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

/* ---------- 断点：600px ---------- */
@media (min-width: 600px) {
  .page-about .hero-frame-body {
    padding: 32px 30px 36px;
  }

  .page-about .hero-copy h1 {
    font-size: 40px;
  }

  .page-about .hero-lede {
    font-size: 18px;
  }

  .page-about .hero-facts {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0 20px;
  }

  .page-about .hero-facts li:nth-child(2) {
    border-top: 0;
    padding-top: 4px;
  }

  .page-about .about-points {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .reach-grid {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .partner-links {
    grid-template-columns: 1fr 1fr;
  }
}

/* ---------- 断点：880px ---------- */
@media (min-width: 880px) {
  .page-about .about-section {
    padding: 62px 0;
  }

  .page-about .about-cols {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: 36px;
    align-items: start;
  }

  .page-about .about-rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    padding-top: 6px;
  }

  .page-about .rail-line {
    width: 3px;
    flex: 0 0 120px;
    height: auto;
    background: linear-gradient(180deg, var(--orange) 0%, rgba(255, 106, 26, 0) 100%);
  }

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

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

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

  .page-about .team-bands {
    grid-template-columns: 1.06fr 1fr 0.94fr;
    align-items: start;
  }

  .page-about .team-band:nth-child(2) {
    margin-top: 30px;
  }

  .page-about .team-band:nth-child(3) {
    margin-top: 14px;
  }

  .page-about .flow {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.86fr);
    align-items: start;
    gap: 34px;
  }

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

  .page-about .about-section--reach .band {
    padding: 62px 0;
  }
}

/* ---------- 悬停展开岗位说明（仅限支持悬停的桌面端） ---------- */
@media (min-width: 880px) and (hover: hover) and (pointer: fine) {
  .page-about .team-band-more {
    max-height: 0;
    margin-top: 0;
    padding-top: 0;
    opacity: 0;
    overflow: hidden;
    border-top-width: 0;
    transition:
      max-height var(--dur) var(--ease),
      opacity var(--dur) var(--ease),
      margin-top var(--dur) var(--ease),
      padding-top var(--dur) var(--ease);
  }

  .page-about .team-band:hover .team-band-more,
  .page-about .team-band:focus-within .team-band-more,
  .page-about .team-band:focus .team-band-more {
    max-height: 260px;
    margin-top: 12px;
    padding-top: 12px;
    opacity: 1;
    border-top-width: 2px;
  }
}

/* ---------- 断点：1080px ---------- */
@media (min-width: 1080px) {
  .page-about .hero-frame-body {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 40px;
    padding: 44px 40px 46px;
  }

  .page-about .hero-copy h1 {
    font-size: 50px;
  }

  .page-about .about-lede {
    font-size: 19px;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-index-list a,
  .page-about .about-point,
  .page-about .team-band,
  .page-about .team-band-more,
  .page-about .flow-step summary,
  .page-about .reach-item,
  .page-about .partner-card,
  .page-about .timeline-dot {
    transition: none;
  }

  .page-about .about-index-list a:hover,
  .page-about .about-point:hover,
  .page-about .team-band:hover,
  .page-about .flow-step summary:hover,
  .page-about .reach-item:hover,
  .page-about .partner-card:hover {
    transform: none;
  }
}
<<<END>>>