.page-about {
  --about-line: rgba(232, 181, 74, 0.22);
  --about-gold-soft: rgba(232, 181, 74, 0.12);
  --about-green-soft: rgba(63, 122, 99, 0.2);
  color: var(--ivory);
  background: var(--ink);
  padding-bottom: clamp(3rem, 8vw, 5.5rem);
}

.page-about .about-anchor {
  display: block;
  height: 0;
  scroll-margin-top: 96px;
}

.page-about .breadcrumb {
  margin: clamp(0.75rem, 2vw, 1.25rem) 0 clamp(0.75rem, 2vw, 1.25rem);
  font-size: 0.8125rem;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  margin-bottom: clamp(2.5rem, 6vw, 4rem);
  padding: clamp(1.5rem, 4.5vw, 3.25rem);
  border: 1px solid var(--about-line);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(120% 110% at 88% -10%, #301c4c 0%, #1c1030 45%, var(--ink) 100%);
}

.page-about .about-hero__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.3;
  -webkit-mask-image: linear-gradient(100deg, transparent 0%, rgba(0, 0, 0, 0.55) 48%, #000 100%);
  mask-image: linear-gradient(100deg, transparent 0%, rgba(0, 0, 0, 0.55) 48%, #000 100%);
}

.page-about .about-hero__inner {
  display: grid;
  gap: clamp(1.5rem, 3.5vw, 2.5rem);
}

.page-about .about-hero__copy h1 {
  margin: 0.5rem 0 0;
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(1.85rem, 5.2vw, 3.3rem);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--ivory);
}

.page-about .about-hero__lede {
  max-width: 34em;
  margin: 1rem 0 0;
  font-size: clamp(0.9375rem, 1.6vw, 1.0625rem);
  line-height: 1.78;
  color: rgba(245, 239, 227, 0.86);
}

.page-about .about-lines {
  display: grid;
  gap: 0.65rem;
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-lines li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.75rem;
  align-items: baseline;
  padding-left: 0.9rem;
  border-left: 2px solid rgba(232, 181, 74, 0.38);
  font-size: 0.9375rem;
  line-height: 1.7;
  color: rgba(245, 239, 227, 0.8);
}

.page-about .about-lines__k {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--gold);
  white-space: nowrap;
}

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

/* 铭牌 */
.page-about .about-plate {
  position: relative;
  align-self: end;
  padding: 1.25rem 1.25rem 1.5rem;
  border: 1px solid rgba(232, 181, 74, 0.45);
  border-radius: var(--radius);
  background:
    linear-gradient(152deg, rgba(246, 217, 138, 0.16), rgba(201, 143, 46, 0.05) 58%, transparent 100%);
}

.page-about .about-plate::after {
  content: "";
  position: absolute;
  top: 10px;
  right: 10px;
  width: 10px;
  height: 10px;
  border-top: 1px solid var(--gold);
  border-right: 1px solid var(--gold);
}

.page-about .about-plate__label {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.2em;
  color: var(--muted);
}

.page-about .about-plate__code {
  margin: 0.5rem 0 0;
  font-family: var(--mono);
  font-size: clamp(2.4rem, 8vw, 3.6rem);
  line-height: 1;
  letter-spacing: 0.14em;
  font-variant-numeric: tabular-nums;
  background: var(--grad-gold);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-about .about-plate__name {
  margin: 0.4rem 0 0;
  font-family: var(--serif);
  font-size: 1.125rem;
  letter-spacing: 0.02em;
}

.page-about .about-plate__note {
  margin: 0.75rem 0 0;
  padding-top: 0.75rem;
  border-top: 1px dashed rgba(232, 181, 74, 0.25);
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 章节通用 ---------- */
.page-about .about-section {
  margin-bottom: clamp(2.75rem, 7vw, 5rem);
  scroll-margin-top: 96px;
}

.page-about .about-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.85rem;
  margin-bottom: 1.25rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid rgba(232, 181, 74, 0.16);
}

.page-about .about-secno {
  flex: 0 0 auto;
  padding: 0.2rem 0.55rem;
  border: 1px solid rgba(232, 181, 74, 0.4);
  border-radius: 6px;
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-about .about-head h2 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(1.45rem, 3vw, 2.1rem);
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.page-about .about-lede {
  max-width: 40em;
  margin: 0 0 1.75rem;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: rgba(245, 239, 227, 0.82);
}

.page-about .about-split {
  display: grid;
  gap: 1.75rem;
}

.page-about .about-split--tight {
  margin-top: 1.75rem;
}

.page-about .about-main .prose p {
  margin: 0 0 1rem;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: rgba(245, 239, 227, 0.84);
}

.page-about .aside-note {
  padding: 1rem 1.1rem;
  border: 1px solid rgba(185, 174, 203, 0.18);
  border-left: 2px solid var(--gold);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: rgba(36, 20, 54, 0.72);
  font-size: 0.8125rem;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .aside-note__title {
  margin: 0 0 0.4rem;
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.page-about .aside-note p {
  margin: 0;
}

/* 编号规则示意 */
.page-about .about-rule-wrap {
  margin-top: 1.5rem;
  padding: 1.1rem 1.1rem 0.9rem;
  border: 1px solid rgba(232, 181, 74, 0.16);
  border-radius: var(--radius);
  background: rgba(36, 20, 54, 0.55);
}

.page-about .about-rule {
  display: block;
  width: 100%;
  max-width: 560px;
  height: auto;
  margin: 0 auto;
}

.page-about .about-rule text {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
}

.page-about .about-rule__caption {
  margin: 0.75rem 0 0;
  font-size: 0.75rem;
  line-height: 1.7;
  color: var(--muted);
  text-align: center;
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  gap: 1rem;
}

.page-about .team-card {
  position: relative;
  isolation: isolate;
  padding: 1.35rem 1.25rem 1.2rem;
  border: 1px solid rgba(185, 174, 203, 0.16);
  border-radius: var(--radius);
  background: var(--ink-2);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .team-card::before {
  content: "";
  position: absolute;
  inset: 12px -6px -10px 10px;
  z-index: -1;
  border-radius: 42% 58% 55% 45% / 48% 38% 62% 52%;
  background: var(--about-green-soft);
}

.page-about .team-card:nth-child(2n)::before {
  background: rgba(200, 106, 60, 0.16);
  border-radius: 55% 45% 40% 60% / 42% 58% 42% 58%;
}

.page-about .team-card:hover,
.page-about .team-card:focus-within {
  transform: translateY(-2px);
  border-color: rgba(232, 181, 74, 0.55);
  box-shadow: 0 0 0 1px rgba(232, 181, 74, 0.18), 0 12px 28px rgba(11, 7, 19, 0.5);
}

.page-about .team-card__no {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.2em;
  color: var(--gold);
}

.page-about .team-card__name {
  margin: 0.35rem 0 0;
  font-family: var(--serif);
  font-size: 1.125rem;
  letter-spacing: 0.01em;
}

.page-about .team-card__count {
  margin: 0.2rem 0 0;
  font-family: var(--mono);
  font-size: 1.5rem;
  letter-spacing: 0.1em;
  font-variant-numeric: tabular-nums;
  color: var(--gold);
}

.page-about .team-card__duty {
  margin: 0.55rem 0 0;
  font-size: 0.875rem;
  line-height: 1.7;
  color: rgba(245, 239, 227, 0.82);
}

.page-about .team-card__tasks {
  margin: 0.85rem 0 0;
  padding: 0.85rem 0 0 1.1rem;
  border-top: 1px dashed rgba(232, 181, 74, 0.22);
  font-size: 0.8125rem;
  line-height: 1.9;
  color: var(--muted);
}

.page-about .team-card__hint {
  display: none;
  margin: 0.6rem 0 0;
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  color: rgba(185, 174, 203, 0.7);
}

.page-about .about-flow {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.75rem 0 0;
  padding: 0;
  list-style: none;
  counter-reset: flow;
}

.page-about .about-flow li {
  counter-increment: flow;
  padding: 0.35rem 0.75rem;
  border: 1px solid rgba(232, 181, 74, 0.28);
  border-radius: 999px;
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: rgba(245, 239, 227, 0.8);
}

.page-about .about-flow li::before {
  content: counter(flow, decimal-leading-zero) " ";
  font-family: var(--mono);
  color: var(--gold);
}

.page-about .about-figure {
  margin: 1.75rem 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid rgba(232, 181, 74, 0.22);
  object-fit: cover;
}

.page-about .about-figure figcaption,
.page-about .about-banner figcaption {
  margin-top: 0.6rem;
  font-size: 0.75rem;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 阶段时间轴 ---------- */
.page-about .about-banner {
  margin: 0 0 1.75rem;
}

.page-about .about-banner img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid rgba(232, 181, 74, 0.2);
  object-fit: cover;
}

.page-about .phase-tabs .tabs__list {
  display: flex;
  gap: 0.5rem;
  margin: 0;
  padding: 0 0 0.85rem;
  list-style: none;
  overflow-x: auto;
  border-bottom: 1px solid rgba(232, 181, 74, 0.2);
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-about .phase-tabs .tabs__tab {
  position: relative;
  flex: 0 0 auto;
  display: grid;
  gap: 0.25rem;
  min-width: 9.5rem;
  padding: 0.85rem 1rem 0.85rem 1.9rem;
  border: 1px solid transparent;
  border-radius: var(--radius);
  background: transparent;
  color: var(--muted);
  text-align: left;
  cursor: pointer;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .phase-tabs .tabs__tab::before {
  content: "";
  position: absolute;
  left: 0.9rem;
  top: 1.15rem;
  width: 8px;
  height: 8px;
  border: 1px solid var(--gold);
  border-radius: 50%;
  background: transparent;
  transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .phase-tabs .tabs__tab:hover {
  color: var(--ivory);
  background: rgba(232, 181, 74, 0.06);
}

.page-about .phase-tabs .tabs__tab[aria-selected="true"] {
  color: var(--ivory);
  border-color: rgba(232, 181, 74, 0.42);
  background: rgba(232, 181, 74, 0.1);
}

.page-about .phase-tabs .tabs__tab[aria-selected="true"]::before {
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(232, 181, 74, 0.18);
}

.page-about .phase-tabs__no {
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-about .phase-tabs__name {
  font-family: var(--serif);
  font-size: 0.9375rem;
  letter-spacing: 0.01em;
}

.page-about .phase-panel {
  margin-top: 1.25rem;
  padding: 1.35rem 1.25rem;
  border: 1px solid rgba(185, 174, 203, 0.16);
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(36, 20, 54, 0.9), rgba(21, 11, 36, 0.75));
}

.page-about .phase-panel h3 {
  margin: 0 0 0.6rem;
  font-family: var(--serif);
  font-size: 1.125rem;
  letter-spacing: 0.01em;
}

.page-about .phase-panel p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: rgba(245, 239, 227, 0.84);
}

.page-about .phase-panel__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .phase-panel__list li {
  padding: 0.3rem 0.7rem;
  border: 1px solid rgba(63, 122, 99, 0.5);
  border-radius: 999px;
  background: rgba(63, 122, 99, 0.16);
  font-size: 0.75rem;
  color: rgba(245, 239, 227, 0.85);
}

.page-about .about-note-line {
  margin: 0;
  padding-left: 0.95rem;
  border-left: 3px solid var(--clay);
  font-family: var(--serif);
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--ivory);
}

/* ---------- 人群 ---------- */
.page-about .aud-list {
  display: grid;
  gap: 0.85rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .aud-item {
  display: grid;
  gap: 0.35rem;
  padding: 1.1rem 1.15rem;
  border: 1px solid rgba(185, 174, 203, 0.16);
  border-radius: var(--radius);
  background: rgba(36, 20, 54, 0.55);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .aud-item:hover {
  border-color: rgba(232, 181, 74, 0.5);
  transform: translateY(-2px);
}

.page-about .aud-item__who {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.0625rem;
  color: var(--ivory);
}

.page-about .aud-item__scene {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .aud-item__link {
  justify-self: start;
  margin-top: 0.35rem;
  padding-bottom: 0.15rem;
  border-bottom: 1px solid rgba(232, 181, 74, 0.45);
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--gold);
  text-decoration: none;
}

.page-about .aud-item__link:hover {
  color: var(--gold-hi);
  border-bottom-color: var(--gold-hi);
}

/* ---------- 服务入口 ---------- */
.page-about .about-section--last {
  margin-bottom: 0;
}

.page-about .entry-list {
  display: grid;
  gap: 0.85rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .entry-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.35rem 1rem;
  align-items: start;
  padding: 1.15rem 1.1rem;
  border: 1px solid rgba(232, 181, 74, 0.18);
  border-radius: var(--radius);
  background: linear-gradient(150deg, rgba(36, 20, 54, 0.85), rgba(21, 11, 36, 0.6));
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .entry-item:hover {
  border-color: rgba(232, 181, 74, 0.5);
  box-shadow: 0 0 0 1px rgba(232, 181, 74, 0.16);
}

.page-about .entry-item__no {
  grid-row: span 2;
  margin: 0;
  font-family: var(--mono);
  font-size: 1rem;
  letter-spacing: 0.14em;
  font-variant-numeric: tabular-nums;
  color: var(--gold);
}

.page-about .entry-item__body h3 {
  margin: 0 0 0.35rem;
  font-family: var(--serif);
  font-size: 1.0625rem;
  letter-spacing: 0.01em;
}

.page-about .entry-item__body p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.78;
  color: rgba(245, 239, 227, 0.8);
  overflow-wrap: break-word;
}

.page-about .entry-item__go {
  grid-column: 2;
  justify-self: start;
  margin-top: 0.6rem;
}

.page-about .about-meta {
  margin: 1.5rem 0 0;
  padding-top: 1rem;
  border-top: 1px dashed rgba(232, 181, 74, 0.22);
  font-size: 0.75rem;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 浮动回跳 ---------- */
.page-about .about-float {
  position: fixed;
  left: 14px;
  bottom: calc(14px + env(safe-area-inset-bottom, 0px));
  z-index: 40;
  padding: 0.5rem 0.85rem;
  border: 1px solid rgba(232, 181, 74, 0.45);
  border-radius: 999px;
  background: rgba(21, 11, 36, 0.92);
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  color: var(--gold);
  text-decoration: none;
  transition: opacity var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-float:hover {
  border-color: var(--gold-hi);
  color: var(--gold-hi);
}

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

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

  .page-about .entry-item {
    grid-template-columns: 3.5rem 1fr auto;
    align-items: center;
  }

  .page-about .entry-item__no {
    grid-row: auto;
  }

  .page-about .entry-item__go {
    grid-column: auto;
    margin-top: 0;
  }
}

@media (min-width: 900px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 1fr) 240px;
    gap: 2.75rem;
    align-items: start;
  }

  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
    align-items: end;
  }

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

@media (min-width: 1080px) {
  .page-about .team-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .team-card:nth-child(2) {
    margin-top: 1.9rem;
  }

  .page-about .team-card:nth-child(3) {
    margin-top: 0.7rem;
  }

  .page-about .team-card:nth-child(4) {
    margin-top: 2.5rem;
  }
}

@media (hover: hover) and (min-width: 1080px) {
  .page-about .team-card__tasks {
    max-height: 0;
    margin-top: 0;
    padding-top: 0;
    border-top-color: transparent;
    overflow: hidden;
    opacity: 0;
    transition: max-height 220ms var(--ease), opacity 180ms var(--ease), margin-top 200ms var(--ease), padding-top 200ms var(--ease);
  }

  .page-about .team-card:hover .team-card__tasks,
  .page-about .team-card:focus-within .team-card__tasks {
    max-height: 13rem;
    margin-top: 0.85rem;
    padding-top: 0.85rem;
    border-top-color: rgba(232, 181, 74, 0.22);
    opacity: 1;
  }

  .page-about .team-card__hint {
    display: block;
  }

  .page-about .team-card:hover .team-card__hint,
  .page-about .team-card:focus-within .team-card__hint {
    opacity: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-card,
  .page-about .aud-item,
  .page-about .entry-item,
  .page-about .about-float,
  .page-about .team-card__tasks,
  .page-about .phase-tabs .tabs__tab {
    transition: none;
  }

  .page-about .team-card:hover,
  .page-about .aud-item:hover {
    transform: none;
  }
}
<<<END>>>