.page-about {
  --about-rule: rgba(220, 205, 178, .18);
  --about-rule-strong: rgba(220, 205, 178, .32);
  --about-card-line: rgba(28, 122, 80, .5);
  display: block;
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  margin-top: clamp(18px, 3vw, 30px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(20px, 4vw, 44px) 0 clamp(34px, 5.5vw, 76px);
  isolation: isolate;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -10% -20% 0 -30%;
  z-index: -1;
  background:
    radial-gradient(58% 62% at 84% 18%, rgba(56, 198, 255, .16), transparent 68%),
    radial-gradient(52% 58% at 12% 6%, rgba(28, 122, 80, .34), transparent 66%),
    radial-gradient(40% 40% at 60% 96%, rgba(217, 255, 60, .08), transparent 70%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
  align-items: center;
}

.page-about .about-hero__kicker {
  display: inline-flex;
  align-items: center;
  gap: .6em;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--lime);
}

.page-about .about-hero__kicker::before {
  content: "";
  width: 26px;
  height: 2px;
  border-radius: 2px;
  background: var(--lime);
}

.page-about .about-hero h1 {
  margin: .38em 0 .5em;
  max-width: 20ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 6.4vw, 58px);
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-about .about-hero__lede {
  max-width: 54ch;
  margin: 0;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: rgba(242, 231, 211, .84);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 18px;
  margin: clamp(24px, 3.4vw, 36px) 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-hero__facts dt {
  margin: 0;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--mist);
}

.page-about .about-hero__facts dd {
  margin: 5px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(20px, 3vw, 28px);
  font-weight: 700;
  color: var(--lime);
  line-height: 1.1;
}

/* ---------- 首屏地图视觉 ---------- */
.page-about .about-map-wrap {
  display: flex;
  justify-content: center;
}

.page-about .about-map {
  position: relative;
  width: min(100%, 440px);
  aspect-ratio: 1 / 1;
}

.page-about .about-map__lines {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.page-about .about-map__lines circle,
.page-about .about-map__lines path {
  fill: none;
  stroke: rgba(28, 122, 80, .72);
  stroke-width: 1.2;
}

.page-about .about-map__lines circle:nth-child(2) {
  stroke: rgba(56, 198, 255, .5);
  stroke-dasharray: 4 8;
}

.page-about .about-map__lines circle:nth-child(3) {
  stroke: rgba(220, 205, 178, .28);
}

.page-about .about-map__lines path {
  stroke: rgba(217, 255, 60, .5);
  stroke-width: 1.6;
}

.page-about .about-map__lines .about-map__cross {
  stroke: rgba(28, 122, 80, .4);
  stroke-dasharray: 3 9;
  stroke-width: 1;
}

.page-about .about-map__center {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  display: grid;
  gap: 4px;
  text-align: center;
}

.page-about .about-map__center b {
  font-family: var(--font-mono);
  font-size: clamp(44px, 10vw, 74px);
  font-weight: 700;
  line-height: .92;
  color: var(--lime);
}

.page-about .about-map__center i {
  font-style: normal;
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--mist);
}

.page-about .about-map__label {
  position: absolute;
  transform: translate(-50%, -50%);
  display: grid;
  gap: 1px;
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--about-card-line);
  background: rgba(6, 23, 15, .88);
  text-align: center;
  white-space: nowrap;
}

.page-about .about-map__label b {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 800;
  color: var(--paper);
}

.page-about .about-map__label i {
  font-style: normal;
  font-size: 10px;
  letter-spacing: .08em;
  color: var(--mist);
}

.page-about .about-map__label--n { left: 50%; top: 8%; }
.page-about .about-map__label--e { left: 85%; top: 50%; }
.page-about .about-map__label--s { left: 50%; top: 92%; }
.page-about .about-map__label--w { left: 15%; top: 50%; }

/* ---------- 章节通用 ---------- */
.page-about .about-ch {
  position: relative;
  padding: clamp(34px, 5vw, 72px) 0;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-ch__body {
  margin-top: clamp(6px, 1.4vw, 14px);
  gap: clamp(20px, 3vw, 40px);
}

.page-about .about-ch__main p {
  margin: 0 0 1.1em;
  font-size: clamp(15px, 1.5vw, 16.5px);
  line-height: 1.85;
  color: rgba(242, 231, 211, .84);
}

.page-about .about-ch__main p:last-child {
  margin-bottom: 0;
}

.page-about .about-ch__main a,
.page-about .about-ch__foot a {
  color: var(--volt);
  text-decoration: underline;
  text-decoration-color: rgba(56, 198, 255, .45);
  text-underline-offset: 3px;
}

.page-about .about-ch__main a:hover,
.page-about .about-ch__foot a:hover {
  text-decoration-color: var(--volt);
}

.page-about .about-ch__lead {
  max-width: 58ch;
  margin: 0 0 clamp(16px, 2.4vw, 24px);
  font-size: clamp(15px, 1.5vw, 16.5px);
  line-height: 1.8;
  color: rgba(242, 231, 211, .8);
}

.page-about .about-ch__foot {
  max-width: 66ch;
  margin: clamp(24px, 3.4vw, 38px) 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 色带 ---------- */
.page-about .band {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 18px;
  margin: 0 0 clamp(18px, 2.6vw, 30px);
  padding: 0 0 14px;
  border: 0;
  background: none;
}

.page-about .band::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 4px;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--lime), var(--turf) 46%, rgba(28, 122, 80, 0) 94%);
  opacity: .55;
}

.page-about .band__num {
  font-family: var(--font-mono);
  font-size: clamp(38px, 7vw, 72px);
  font-weight: 700;
  line-height: .88;
  color: var(--lime);
}

.page-about .band__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(21px, 3.4vw, 34px);
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--paper);
}

/* ---------- 旁注卡 ---------- */
.page-about .about-ch__aside {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-about .aside-card {
  border-radius: var(--radius-md);
  border: 1px solid var(--paper-edge);
  background: var(--paper);
  box-shadow: 0 16px 34px rgba(3, 12, 7, .5);
  overflow: hidden;
}

.page-about .aside-card--tilt {
  transform: rotate(-1.2deg);
}

.page-about .aside-card summary {
  position: relative;
  display: grid;
  gap: 4px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
}

.page-about .aside-card summary::-webkit-details-marker {
  display: none;
}

.page-about .aside-card summary::after {
  content: "展开";
  position: absolute;
  right: 14px;
  top: 14px;
  padding: 1px 9px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(28, 122, 80, .45);
  font-size: 11px;
  color: var(--turf);
}

.page-about .aside-card[open] summary::after {
  content: "收起";
  background: var(--turf);
  border-color: var(--turf);
  color: var(--paper);
}

.page-about .aside-card__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: #6d7a72;
}

.page-about .aside-card__title {
  padding-right: 62px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 15.5px;
  line-height: 1.45;
  color: var(--ink);
}

.page-about .aside-card__body {
  padding: 12px 16px 16px;
  border-top: 1px solid var(--paper-edge);
}

.page-about .aside-card__body p {
  margin: 0 0 .8em;
  font-size: 14px;
  line-height: 1.75;
  color: #2b3731;
}

.page-about .aside-card__body p:last-child {
  margin-bottom: 0;
}

/* ---------- 整理流程 ---------- */
.page-about .flow-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.4vw, 44px);
}

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

.page-about .flow__step {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 14px;
  padding: 20px 0;
  border-bottom: 1px dashed var(--about-rule-strong);
}

.page-about .flow__step:first-child {
  padding-top: 4px;
}

.page-about .flow__step:last-child {
  border-bottom: 0;
  padding-bottom: 4px;
}

.page-about .flow__num {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 14px;
  border: 1px solid var(--about-card-line);
  background: rgba(28, 122, 80, .3);
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 700;
  color: var(--lime);
}

.page-about .flow__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17.5px;
  line-height: 1.35;
  color: var(--paper);
}

.page-about .flow__desc {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .flow__out {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 10px;
  margin: 0;
  font-size: 13px;
  color: rgba(242, 231, 211, .82);
}

.page-about .flow__who {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: rgba(143, 167, 155, .95);
}

.page-about .flow-visual {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-about .flow-visual__note {
  margin: 0;
  padding-left: 14px;
  border-left: 3px solid var(--turf);
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 图片容器 ---------- */
.page-about .media-frame {
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius-lg);
}

.page-about .media-frame img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .city-banner {
  margin-top: clamp(18px, 2.6vw, 28px);
}

/* ---------- 城市对照 ---------- */
.page-about .about-city-filter {
  margin-bottom: clamp(6px, 1.4vw, 14px);
}

.page-about .city-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: clamp(18px, 2.6vw, 28px);
}

.page-about .city-card {
  position: relative;
  padding: 22px 22px 20px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--about-card-line);
  background: linear-gradient(158deg, rgba(12, 46, 34, .95), rgba(6, 23, 15, .92));
  overflow: hidden;
}

.page-about .city-card::after {
  content: "";
  position: absolute;
  right: -46px;
  bottom: -56px;
  width: 150px;
  height: 150px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(56, 198, 255, .22), rgba(56, 198, 255, 0) 70%);
  pointer-events: none;
}

.page-about .city-card--gz::after {
  background: radial-gradient(circle, rgba(217, 255, 60, .18), rgba(217, 255, 60, 0) 70%);
}

.page-about .city-card p {
  position: relative;
  margin: 0 0 .8em;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(242, 231, 211, .8);
}

.page-about .city-card__name {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(25px, 4vw, 38px);
  line-height: 1.1;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-about .city-card__name span {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .16em;
  color: var(--lime);
}

.page-about .city-card__cadence {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 !important;
  font-size: 13.5px;
  color: var(--mist) !important;
}

/* ---------- 团队 ---------- */
.page-about .team-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.4vw, 44px);
}

.page-about .team-main > p {
  margin: 0 0 clamp(16px, 2.4vw, 24px);
  font-size: clamp(15px, 1.5vw, 16.5px);
  line-height: 1.85;
  color: rgba(242, 231, 211, .84);
}

.page-about .team-visual {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-about .team-stat {
  display: grid;
  gap: 4px;
  padding: 18px 20px;
  border-radius: var(--radius-lg);
  border: 1px dashed var(--about-rule-strong);
}

.page-about .team-stat .stat__value {
  font-family: var(--font-mono);
  font-size: clamp(48px, 8vw, 72px);
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
}

.page-about .team-stat .stat__label {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 发展节点 ---------- */
.page-about .mile {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .mile__item {
  position: relative;
  padding: 4px 0 26px 24px;
  border-left: 2px solid rgba(28, 122, 80, .5);
}

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

.page-about .mile__item::before {
  content: "";
  position: absolute;
  left: -9px;
  top: 10px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--night);
  border: 2px solid var(--lime);
}

.page-about .mile__item:last-child::before {
  background: var(--lime);
}

.page-about .mile__era {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .14em;
  color: var(--lime);
}

.page-about .mile__title {
  margin: 6px 0 6px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(17px, 2.2vw, 21px);
  line-height: 1.35;
  color: var(--paper);
}

.page-about .mile__item p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 合作方向 ---------- */
.page-about .about-ch--reach {
  border-top: 1px solid var(--about-rule);
}

.page-about .reach-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-about .reach-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 24px 22px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--about-card-line);
  background: rgba(12, 46, 34, .68);
}

.page-about .reach-card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .reach-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .reach-card .btn {
  align-self: flex-start;
  margin-top: auto;
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-about .reach-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .city-grid {
    grid-template-columns: repeat(12, 1fr);
  }
  .page-about .city-card--sh { grid-column: span 7; }
  .page-about .city-card--bj { grid-column: span 5; }
  .page-about .city-card--gz { grid-column: span 5; }
  .page-about .city-card--cd { grid-column: span 7; }
}

@media (min-width: 940px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: clamp(30px, 4vw, 60px);
  }
  .page-about .about-map {
    width: min(100%, 460px);
  }
}

@media (min-width: 980px) {
  .page-about .flow-layout {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, .85fr);
    align-items: start;
  }
  .page-about .team-layout {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, .8fr);
    align-items: start;
  }
}

@media (max-width: 420px) {
  .page-about .about-map__label {
    padding: 5px 9px;
  }
  .page-about .about-map__label b {
    font-size: 13px;
  }
  .page-about .about-map__label i {
    font-size: 9px;
  }
  .page-about .flow__step {
    grid-template-columns: 38px minmax(0, 1fr);
    gap: 12px;
  }
  .page-about .flow__num {
    width: 38px;
    height: 38px;
    border-radius: 12px;
    font-size: 15px;
  }
  .page-about .flow__who {
    margin-left: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .aside-card--tilt {
    transform: none;
  }
}