.page-about {
  --about-soft: rgba(242, 246, 247, .82);
  --about-chip: rgba(6, 11, 12, .38);
  color: var(--text);
}

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

.page-about a:focus-visible,
.page-about summary:focus-visible,
.page-about .tab:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(22px, 4vw, 40px) 0 clamp(34px, 6vw, 68px);
  background:
    radial-gradient(130% 100% at 88% -12%, rgba(53, 224, 255, .14), transparent 58%),
    radial-gradient(90% 90% at 0% 0%, rgba(58, 46, 110, .55), transparent 62%),
    linear-gradient(180deg, rgba(16, 31, 63, .85), rgba(11, 43, 38, .18));
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero .crumbs {
  margin-bottom: 22px;
}

.page-about .hero-grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  align-items: end;
}

.page-about .about-title {
  margin: .18em 0 .55em;
  font-size: clamp(2.05rem, 6.4vw, 4rem);
  font-weight: 900;
  line-height: 1.04;
  letter-spacing: -.02em;
}

.page-about .about-lede {
  max-width: 40ch;
  font-size: clamp(1rem, 1.6vw, 1.1rem);
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-attrs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 20px;
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.page-about .about-attrs .stat-value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3.2vw, 2.15rem);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-attrs .stat-hot .stat-value {
  color: var(--orange);
}

.page-about .about-attrs .stat-label {
  display: block;
  margin-top: 7px;
  font-size: .8rem;
  letter-spacing: .04em;
  color: var(--muted);
}

.page-about .hero-visual {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  border-radius: var(--radius-a);
  border: 1px solid var(--line-cyan);
}

.page-about .hero-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 章节框架 ---------- */
.page-about .chapter {
  padding: clamp(44px, 7vw, 88px) 0;
  border-top: 1px solid var(--line);
}

.page-about .chapter--indigo {
  background: linear-gradient(180deg, rgba(16, 31, 63, .92), rgba(16, 31, 63, .34));
}

.page-about .chapter--wine {
  background: linear-gradient(180deg, rgba(90, 31, 46, .52), rgba(11, 43, 38, .12));
}

.page-about .chapter--amethyst {
  background: linear-gradient(180deg, rgba(58, 46, 110, .58), rgba(11, 43, 38, .16));
}

.page-about .chapter-inner {
  display: grid;
  gap: 18px;
}

.page-about .mark {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .16em;
  color: var(--muted);
}

.page-about .mark b {
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -.02em;
  color: rgba(232, 184, 75, .92);
  line-height: 1;
}

.page-about .section-title {
  margin: .3em 0 .5em;
  font-size: clamp(1.55rem, 3.4vw, 2.45rem);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -.01em;
}

.page-about .section-lede {
  max-width: 46ch;
  line-height: 1.85;
  color: var(--about-soft);
}

/* ---------- 需求清单 ---------- */
.page-about .demand-list {
  margin-top: 30px;
  border-top: 1px solid var(--line);
}

.page-about .demand-item {
  display: grid;
  gap: 8px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .demand-item h3 {
  font-size: 1.02rem;
  font-weight: 800;
  letter-spacing: .01em;
}

.page-about .demand-item p {
  line-height: 1.82;
  color: var(--about-soft);
}

/* ---------- 覆盖地图 ---------- */
.page-about .coverage-visual {
  margin-top: 26px;
  padding: clamp(14px, 3vw, 26px);
  border: 1px solid var(--line);
  border-radius: var(--radius-b);
  background: linear-gradient(160deg, rgba(6, 11, 12, .55), rgba(58, 46, 110, .28));
}

.page-about .city-dots {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .legend {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  margin-top: 14px;
  padding: 0;
  list-style: none;
  font-size: .8rem;
  color: var(--muted);
}

.page-about .legend li {
  display: flex;
  align-items: center;
  gap: 7px;
}

.page-about .legend i {
  display: inline-block;
  width: 9px;
  height: 9px;
  border-radius: 50%;
}

.page-about .legend .l-cyan i { background: var(--cyan); }
.page-about .legend .l-orange i { background: var(--orange); }
.page-about .legend .l-silver i { background: var(--silver); }

.page-about .tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 30px 0 18px;
}

.page-about .tab {
  padding: 10px 16px;
  font: inherit;
  font-size: .88rem;
  font-weight: 700;
  color: var(--mist);
  background: var(--about-chip);
  border: 1px solid var(--line);
  border-radius: var(--radius-b);
  cursor: pointer;
}

.page-about .tab[aria-selected="true"] {
  color: #fff;
  background: var(--amethyst);
  border-color: var(--line-cyan);
  box-shadow: inset 0 0 0 1px rgba(53, 224, 255, .28);
}

.page-about .tabpanel {
  padding-top: 4px;
}

.page-about .city-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .city-chip {
  padding: 12px 14px;
  background: var(--about-chip);
  border: 1px solid var(--line);
  border-left: 2px solid var(--cyan);
  border-radius: 2px 12px 2px 12px;
}

.page-about .city-name {
  display: block;
  font-weight: 800;
}

.page-about .city-meta {
  display: block;
  margin-top: 4px;
  font-size: .78rem;
  color: var(--muted);
}

/* ---------- 成长坐标轴 ---------- */
.page-about .axis-wrap {
  display: grid;
  gap: 30px;
  margin-top: 28px;
}

.page-about .axis {
  position: relative;
  margin: 0;
  padding: 0 0 0 30px;
  list-style: none;
}

.page-about .axis::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, var(--amber), rgba(232, 184, 75, .12));
}

.page-about .axis-node {
  position: relative;
  padding-bottom: 34px;
}

.page-about .axis-node:last-child {
  padding-bottom: 0;
}

.page-about .axis-node::before {
  content: "";
  position: absolute;
  left: -29px;
  top: 6px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 0 4px rgba(232, 184, 75, .14);
}

.page-about .axis-season {
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-about .axis-title {
  margin: .4em 0 .5em;
  font-size: clamp(1.12rem, 2.4vw, 1.5rem);
  font-weight: 800;
}

.page-about .axis-body {
  max-width: 44ch;
  line-height: 1.82;
  color: var(--about-soft);
}

.page-about .axis-figure {
  aspect-ratio: 1 / 1;
  overflow: hidden;
  border-radius: var(--radius-b);
  border: 1px solid rgba(199, 207, 214, .22);
}

.page-about .axis-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  gap: 26px;
  margin-top: 28px;
}

.page-about .team-visual {
  aspect-ratio: 3 / 2;
  overflow: hidden;
  border-radius: var(--radius-a);
  border: 1px solid var(--line);
}

.page-about .team-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .crew-grid {
  display: grid;
  gap: 12px;
}

.page-about .crew-item {
  padding: 16px 18px;
  background: rgba(16, 31, 63, .46);
  border: 1px solid var(--line);
  border-radius: var(--radius-b);
}

.page-about .crew-item[open] {
  border-color: var(--line-cyan);
  background: rgba(16, 31, 63, .62);
}

.page-about .crew-item summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  list-style: none;
}

.page-about .crew-item summary::-webkit-details-marker {
  display: none;
}

.page-about .crew-item summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--cyan);
}

.page-about .crew-item[open] summary::after {
  content: "–";
}

.page-about .crew-name {
  font-size: 1.02rem;
  font-weight: 800;
}

.page-about .crew-tag {
  padding: 2px 9px;
  font-family: var(--font-mono);
  font-size: .74rem;
  color: var(--amber);
  border: 1px solid rgba(232, 184, 75, .35);
  border-radius: 999px;
}

.page-about .crew-body {
  margin-top: 12px;
  font-size: .95rem;
  line-height: 1.8;
  color: var(--about-soft);
}

/* ---------- 投入方向 ---------- */
.page-about .next-grid {
  margin-top: 30px;
  border-top: 1px solid var(--line);
}

.page-about .next-item {
  display: grid;
  gap: 8px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .next-num {
  font-family: var(--font-mono);
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--amber);
  line-height: 1;
}

.page-about .next-item h3 {
  margin-bottom: 6px;
  font-size: 1.08rem;
  font-weight: 800;
}

.page-about .next-item p {
  max-width: 46ch;
  line-height: 1.82;
  color: var(--about-soft);
}

/* ---------- 行动区 ---------- */
.page-about .about-cta {
  margin-top: clamp(32px, 5vw, 56px);
  padding: clamp(22px, 4vw, 40px);
  background: linear-gradient(120deg, rgba(58, 46, 110, .78), rgba(11, 43, 38, .92));
  border: 1px solid var(--line-cyan);
  border-radius: var(--radius-a);
}

.page-about .about-cta h2 {
  font-size: clamp(1.28rem, 3vw, 1.85rem);
  font-weight: 900;
  line-height: 1.24;
}

.page-about .about-cta p {
  max-width: 48ch;
  margin-top: 12px;
  line-height: 1.82;
  color: var(--about-soft);
}

.page-about .btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 760px) {
  .page-about .about-attrs {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .demand-item {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 26px;
    align-items: start;
  }

  .page-about .next-item {
    grid-template-columns: 84px minmax(0, 1fr);
    gap: 28px;
    align-items: start;
  }

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

@media (min-width: 960px) {
  .page-about .hero-grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
  }

  .page-about .chapter-inner {
    grid-template-columns: 108px minmax(0, 1fr);
    gap: 40px;
  }

  .page-about .mark {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    padding-bottom: 0;
    border-bottom: 0;
    border-right: 1px solid var(--line);
    padding-right: 18px;
    position: sticky;
    top: 96px;
    align-self: start;
  }

  .page-about .axis-wrap {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .axis-figure {
    position: sticky;
    top: 96px;
  }

  .page-about .team-grid {
    grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
    gap: 34px;
    align-items: start;
  }
}