.page-about {
  --ab-gap: clamp(52px, 7vw, 104px);
  color: var(--mist);
}

.page-about .section {
  padding-block: var(--ab-gap) 0;
}

.page-about img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ===== 面包屑 ===== */
.page-about .about-crumb {
  padding-top: 22px;
}

.page-about .about-crumb .breadcrumb {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--slate);
}

.page-about .about-crumb .breadcrumb li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.page-about .about-crumb .breadcrumb li + li::before {
  content: "/";
  color: var(--line-strong);
}

.page-about .about-crumb .breadcrumb a {
  color: var(--slate);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s ease, border-color .2s ease;
}

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

.page-about .about-crumb .breadcrumb [aria-current="page"] {
  color: var(--lime);
}

/* ===== 框景首屏 ===== */
.page-about .about-hero {
  padding-top: 26px;
}

.page-about .hero-window {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-xl);
  padding: clamp(34px, 5vw, 62px) clamp(22px, 5vw, 58px) clamp(30px, 5vw, 54px);
  background:
    radial-gradient(120% 140% at 90% -14%, rgba(70, 216, 255, .16), transparent 58%),
    radial-gradient(90% 120% at -6% 106%, rgba(201, 255, 74, .13), transparent 62%),
    var(--pine);
}

.page-about .hero-window::before,
.page-about .hero-window::after {
  content: "";
  position: absolute;
  width: 34px;
  height: 34px;
  pointer-events: none;
}

.page-about .hero-window::before {
  top: 14px;
  right: 14px;
  border-top: 2px solid var(--lime);
  border-right: 2px solid var(--lime);
  border-top-right-radius: 14px;
}

.page-about .hero-window::after {
  bottom: 14px;
  left: 14px;
  border-bottom: 2px solid var(--blue);
  border-left: 2px solid var(--blue);
  border-bottom-left-radius: 14px;
}

.page-about .hero-window__scale {
  position: absolute;
  top: 18px;
  left: clamp(22px, 5vw, 58px);
  right: clamp(22px, 5vw, 58px);
  display: flex;
  justify-content: space-between;
  pointer-events: none;
}

.page-about .hero-window__scale span {
  width: 1px;
  height: 10px;
  background: var(--line-strong);
}

.page-about .hero-window__scale span:nth-child(3n) {
  height: 15px;
  background: var(--lime);
  opacity: .7;
}

.page-about .hero-window__inner {
  position: relative;
  max-width: 62ch;
}

.page-about .hero-window__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(30px, 5.6vw, 50px);
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--mist);
}

.page-about .hero-window__lead {
  margin: 20px 0 0;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: rgba(241, 245, 238, .82);
  max-width: 60ch;
}

.page-about .hero-stats {
  list-style: none;
  margin: 38px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-about .hero-stats__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.page-about .hero-stats__cap {
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--slate);
}

@media (min-width: 640px) {
  .page-about .hero-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 30px;
  }
}

/* ===== 序言两栏 ===== */
.page-about .split {
  display: grid;
  gap: clamp(28px, 4vw, 54px);
}

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

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

.page-about .split__figure {
  margin: 0;
}

.page-about .about-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 26px 0 0;
}

/* ===== 三步流程 ===== */
.page-about .flow-steps {
  list-style: none;
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-about .flow-step {
  position: relative;
  padding: 26px 24px 28px;
  border-radius: var(--r-lg);
  background: var(--pine);
  border: 1px solid var(--line);
}

.page-about .flow-step__idx {
  display: inline-block;
  font-family: var(--font-mono);
  color: var(--orange);
  letter-spacing: .1em;
}

.page-about .flow-step__title {
  margin: 12px 0 8px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 21px;
  line-height: 1.3;
  color: var(--mist);
}

.page-about .flow-step__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(241, 245, 238, .76);
}

@media (min-width: 900px) {
  .page-about .flow-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }

  .page-about .flow-step::after {
    content: "";
    position: absolute;
    top: 46px;
    right: -22px;
    width: 22px;
    height: 0;
    border-top: 2px dashed rgba(255, 138, 60, .5);
  }

  .page-about .flow-step:last-child::after {
    display: none;
  }
}

.page-about .flow-figure {
  margin: clamp(28px, 4vw, 44px) 0 0;
}

.page-about .flow-notes {
  margin-top: clamp(24px, 3vw, 38px);
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

@media (min-width: 820px) {
  .page-about .flow-notes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-about .flow-note {
  padding: 22px 24px 24px;
  border-radius: var(--r-md);
  background: var(--navy);
  border: 1px solid var(--line-blue);
}

.page-about .flow-note--lime {
  border-left: 3px solid var(--lime);
}

.page-about .flow-note--blue {
  border-left: 3px solid var(--blue);
}

.page-about .flow-note__title {
  margin: 0 0 8px;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: .1em;
  color: var(--lime);
}

.page-about .flow-note--blue .flow-note__title {
  color: var(--blue);
}

.page-about .flow-note p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(241, 245, 238, .8);
}

/* ===== 团队 ===== */
.page-about .team-grid {
  margin-top: clamp(28px, 4vw, 46px);
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-about .team-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 26px 24px 28px;
  border-radius: var(--r-lg);
  background: linear-gradient(160deg, rgba(20, 58, 47, .95), rgba(10, 42, 34, .92));
  border: 1px solid var(--line);
  transition: border-color .22s ease, transform .22s ease;
}

.page-about .team-card:hover {
  border-color: var(--line-blue);
}

.page-about .team-card__count {
  font-family: var(--font-mono);
}

.page-about .team-card__role {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 20px;
  line-height: 1.3;
  color: var(--mist);
}

.page-about .team-card__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(241, 245, 238, .74);
}

@media (min-width: 720px) {
  .page-about .team-grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .team-card {
    grid-column: span 6;
  }

  .page-about .team-card--s5 {
    grid-column: span 12;
  }
}

@media (min-width: 1000px) {
  .page-about .team-card--s5 {
    grid-column: span 5;
    min-height: 252px;
  }

  .page-about .team-card--s4 {
    grid-column: span 4;
    min-height: 220px;
  }

  .page-about .team-card--s3 {
    grid-column: span 3;
    min-height: 196px;
  }
}

.page-about .team-figure {
  margin: clamp(32px, 4vw, 52px) 0 0;
  max-width: 720px;
}

/* ===== 时间线 ===== */
.page-about .tl-list {
  list-style: none;
  margin: clamp(30px, 4vw, 48px) 0 0;
  padding: 0 0 0 26px;
  position: relative;
  display: grid;
  gap: 30px;
}

.page-about .tl-list::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 12px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--lime), var(--blue) 56%, rgba(70, 216, 255, .12));
}

.page-about .tl-item {
  position: relative;
  max-width: 66ch;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 8px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--bg-deep);
  border: 2px solid var(--lime);
}

.page-about .tl-item__tag {
  display: inline-block;
}

.page-about .tl-item__title {
  margin: 12px 0 8px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(19px, 2.2vw, 23px);
  line-height: 1.35;
  color: var(--mist);
}

.page-about .tl-item__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(241, 245, 238, .78);
}

/* ===== 版本切换 ===== */
.page-about .panel-switch {
  margin-top: clamp(38px, 5vw, 60px);
}

.page-about .tablist {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 6px;
  max-width: 100%;
  border-radius: 999px;
  background: var(--charcoal);
  border: 1px solid var(--line);
}

.page-about .tab {
  appearance: none;
  border: 0;
  cursor: pointer;
  padding: 9px 20px;
  border-radius: 999px;
  background: transparent;
  color: var(--slate);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  transition: background .22s ease, color .22s ease;
}

.page-about .tab[aria-selected="true"] {
  background: var(--lime);
  color: var(--bg-deep);
}

.page-about .tab:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}

.page-about .tabpanel {
  margin-top: 22px;
}

.page-about .tabpanel[hidden] {
  display: none;
}

.page-about .ver-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

@media (min-width: 880px) {
  .page-about .ver-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-about .ver-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 18px;
  align-items: start;
  padding: 20px 22px 22px;
  border-radius: var(--r-lg);
  background: var(--navy);
  border: 1px solid var(--line-blue);
}

.page-about .ver-item__ver {
  font-family: var(--font-mono);
  color: var(--blue);
  letter-spacing: .04em;
  padding-top: 3px;
}

.page-about .ver-item__title {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--mist);
}

.page-about .ver-item__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: rgba(241, 245, 238, .74);
}

/* ===== 合作生态 ===== */
.page-about .partner-grid {
  margin-top: clamp(28px, 4vw, 46px);
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-about .partner-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 28px 26px 30px;
  border-radius: var(--r-xl);
  background: rgba(16, 20, 19, .72);
  border: 1px solid var(--line);
}

@media (min-width: 840px) {
  .page-about .partner-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .partner-card:nth-child(2) {
    margin-top: 32px;
  }

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

.page-about .partner-card__num {
  font-family: var(--font-mono);
}

.page-about .partner-card__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 19px;
  line-height: 1.35;
  color: var(--mist);
}

.page-about .partner-card__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(241, 245, 238, .76);
}

/* ===== 站点信息 ===== */
.page-about .about-site {
  padding-bottom: clamp(56px, 7vw, 96px);
}

.page-about .site-block {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  padding: clamp(26px, 4vw, 50px);
  border-radius: var(--r-xl);
  background: linear-gradient(150deg, rgba(14, 43, 58, .88), rgba(10, 42, 34, .94));
  border: 1px solid var(--line-strong);
}

@media (min-width: 900px) {
  .page-about .site-block {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }
}

.page-about .site-block__text {
  margin: 18px 0 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: rgba(241, 245, 238, .8);
  max-width: 60ch;
}

.page-about .site-facts {
  margin: 0;
  display: grid;
  gap: 0;
  align-content: start;
}

.page-about .site-facts > div {
  display: grid;
  gap: 5px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .site-facts > div:first-child {
  padding-top: 0;
}

.page-about .site-facts > div:last-child {
  border-bottom: 0;
}

.page-about .site-facts dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--slate);
}

.page-about .site-facts dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--mist);
  word-break: break-word;
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-card,
  .page-about .tab,
  .page-about .about-crumb .breadcrumb a {
    transition: none;
  }
}
<<<END>>>