.page-about {
  --about-gap: clamp(20px, 3vw, 40px);
  --about-edge: 1px solid var(--line);
}

/* 面包屑 */
.page-about .about-crumb {
  padding-top: 24px;
}

/* 首屏 */
.page-about .about-hero {
  display: grid;
  gap: var(--about-gap);
  padding-top: clamp(28px, 5vw, 64px);
  padding-bottom: clamp(32px, 6vw, 72px);
}

.page-about .about-hero-l h1 {
  font-family: var(--font-display);
  font-size: clamp(28px, 5.4vw, 52px);
  font-weight: 900;
  line-height: 1.24;
  letter-spacing: .01em;
  color: var(--ink);
  margin: 14px 0 0;
  max-width: 20ch;
}

.page-about .about-lede {
  margin-top: 18px;
  font-size: 17px;
  line-height: 1.78;
  color: var(--muted);
  max-width: 42ch;
}

.page-about .about-lede--tight {
  margin-top: 8px;
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-about .about-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-about .about-hero-acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* 首屏右侧板 */
.page-about .about-hero-r {
  display: grid;
  gap: 18px;
}

.page-about .about-board {
  position: relative;
  border-radius: var(--radius-lg);
  background:
    radial-gradient(120% 90% at 12% 0%, rgba(34, 230, 255, .16), transparent 60%),
    radial-gradient(120% 90% at 100% 100%, rgba(255, 63, 164, .14), transparent 62%),
    var(--panel);
  border: var(--about-edge);
  padding: 22px;
  overflow: hidden;
  transition: transform .4s var(--ease);
}

.page-about .about-board::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(244, 241, 255, .16) 1px, transparent 1px);
  background-size: 12px 12px;
  opacity: .28;
  pointer-events: none;
}

.page-about .about-board:hover {
  transform: translateY(-6px);
}

.page-about .about-board-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--line);
}

.page-about .about-board-top .mono {
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--cyan);
}

.page-about .about-board-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 0 0 12px rgba(75, 255, 196, .8);
}

.page-about .about-board-cells {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 18px;
}

.page-about .about-cell {
  position: relative;
  min-height: 84px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: rgba(10, 6, 22, .6);
  padding: 12px;
  display: flex;
  align-items: flex-start;
}

.page-about .about-cell .mono {
  font-size: 15px;
  font-weight: 700;
  color: var(--yellow);
}

.page-about .about-cell i {
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 12px;
  height: 6px;
  border-radius: var(--pill);
  background: linear-gradient(90deg, var(--cyan), transparent);
  opacity: .7;
}

.page-about .about-cell--wide {
  grid-column: span 2;
  min-height: 72px;
}

.page-about .about-cell--wide i {
  background: linear-gradient(90deg, var(--magenta), transparent);
}

.page-about .about-cell--tall {
  min-height: 118px;
}

.page-about .about-board-note {
  margin-top: 16px;
  font-size: 14px;
  color: var(--muted);
}

.page-about .about-side {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-side li {
  display: flex;
  align-items: baseline;
  gap: 14px;
  border: var(--about-edge);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  background: rgba(21, 11, 46, .55);
}

.page-about .about-side b {
  font-size: 22px;
  font-weight: 700;
  color: var(--cyan);
  min-width: 4.5ch;
}

.page-about .about-side span {
  font-size: 15px;
  color: var(--ink);
  line-height: 1.5;
}

/* 分栏图文 */
.page-about .about-split {
  display: grid;
  gap: var(--about-gap);
  align-items: start;
}

.page-about .about-split-text .prose + .prose {
  margin-top: 16px;
}

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

.page-about .about-points li {
  border-left: 2px solid var(--cyan);
  padding-left: 14px;
}

.page-about .about-points li + li {
  margin-top: 12px;
  border-left-color: var(--magenta);
}

.page-about .about-points li:nth-child(3) {
  border-left-color: var(--yellow);
}

.page-about .about-figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: var(--about-edge);
  background: var(--panel);
  box-shadow: 0 24px 60px -40px rgba(34, 230, 255, .5);
}

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

.page-about .about-figure figcaption {
  padding: 12px 16px;
  font-size: 13px;
  color: var(--muted);
  border-top: 1px dashed var(--line);
}

.page-about .about-figure--tall img {
  aspect-ratio: 4 / 3;
}

/* 编年长卷 */
.page-about .about-chrono {
  display: grid;
  gap: var(--about-gap);
  align-items: start;
}

.page-about .about-chrono-index {
  border: var(--about-edge);
  border-radius: var(--radius-lg);
  background: rgba(10, 6, 22, .7);
  padding: 20px;
}

.page-about .about-chrono-index .label {
  display: block;
  margin-bottom: 14px;
}

.page-about .about-index-list {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 4px;
}

.page-about .about-index-list a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--ink);
  font-size: 15px;
  border-left: 2px solid transparent;
  transition: background .25s var(--ease), border-color .25s var(--ease), transform .25s var(--ease);
}

.page-about .about-index-list .mono {
  font-size: 14px;
  color: var(--cyan);
  min-width: 5ch;
}

.page-about .about-index-list a:hover,
.page-about .about-index-list a:focus-visible {
  background: rgba(34, 230, 255, .1);
  border-left-color: var(--yellow);
  transform: translateX(4px);
}

.page-about .about-chrono-body {
  display: grid;
  gap: var(--about-gap);
}

.page-about .about-timeline {
  border: var(--about-edge);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(21, 11, 46, .9), rgba(10, 6, 22, .9));
  padding: 10px 6px 0;
  overflow: hidden;
}

.page-about .about-timeline svg {
  width: 100%;
  height: auto;
  display: block;
}

.page-about .about-tl-line {
  stroke: var(--line);
  stroke-width: 2;
}

.page-about .about-tl-node {
  fill: var(--yellow);
}

.page-about .about-tl-node--dim {
  fill: var(--panel);
  stroke: var(--cyan);
  stroke-width: 2;
}

.page-about .about-tl-node--live {
  fill: var(--magenta);
}

.page-about .about-tl-text {
  fill: var(--muted);
  font-family: var(--font-mono);
  font-size: 18px;
}

.page-about .about-stages {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-stage {
  position: relative;
  border: var(--about-edge);
  border-radius: var(--radius-lg);
  background: rgba(21, 11, 46, .62);
  padding: 22px;
  overflow: hidden;
}

.page-about .about-stage::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--cyan), var(--magenta));
}

.page-about .about-stage-year {
  font-size: 13px;
  letter-spacing: .2em;
  color: var(--yellow);
  margin: 0 0 8px;
}

.page-about .about-stage h3 {
  font-size: 20px;
  line-height: 1.4;
  color: var(--ink);
  margin: 0 0 10px;
}

.page-about .about-stage p {
  font-size: 16px;
  line-height: 1.75;
  color: var(--muted);
  margin: 0;
}

.page-about .about-figure--wide img {
  aspect-ratio: 2 / 1;
}

/* 团队环 */
.page-about .about-team {
  display: grid;
  gap: var(--about-gap);
}

.page-about .about-orbit-wrap {
  display: grid;
  justify-items: center;
  gap: 14px;
  padding: clamp(20px, 4vw, 34px) 12px;
  border: var(--about-edge);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(90% 70% at 50% 50%, rgba(255, 63, 164, .12), transparent 65%),
    rgba(10, 6, 22, .7);
}

.page-about .about-orbit {
  position: relative;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  border: 1px dashed var(--line);
}

.page-about .about-orbit-core {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 128px;
  height: 128px;
  border-radius: 50%;
  background: var(--panel);
  border: 1px solid var(--line);
  display: grid;
  place-content: center;
  text-align: center;
  gap: 2px;
}

.page-about .about-orbit-core .mono-figure {
  font-size: 30px;
  color: var(--cyan);
}

.page-about .about-orbit-core span:last-child {
  font-size: 13px;
  color: var(--muted);
}

.page-about .about-orbit-node {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%) translate(var(--tx), var(--ty));
  display: grid;
  gap: 2px;
  place-items: center;
  width: 104px;
  padding: 12px 8px;
  border-radius: var(--radius-md);
  background: rgba(21, 11, 46, .92);
  border: 1px solid var(--line);
  text-decoration: none;
  color: var(--ink);
  transition: transform .3s var(--ease), border-color .3s var(--ease), box-shadow .3s var(--ease);
}

.page-about .about-orbit-node .mono {
  font-size: 12px;
  color: var(--muted);
}

.page-about .about-orbit-node b {
  font-size: 14px;
  font-weight: 700;
}

.page-about .about-orbit-node:hover,
.page-about .about-orbit-node:focus-visible {
  transform: translate(-50%, -50%) translate(var(--tx), var(--ty)) scale(1.08);
  border-color: var(--yellow);
  box-shadow: 0 0 0 2px rgba(255, 226, 74, .26);
}

.page-about .about-orbit-node--plan:hover b { color: var(--cyan); }
.page-about .about-orbit-node--art:hover b { color: var(--magenta); }
.page-about .about-orbit-node--dev:hover b { color: var(--mint); }
.page-about .about-orbit-node--ops:hover b { color: var(--orange); }

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

.page-about .about-note {
  border: var(--about-edge);
  border-radius: var(--radius-lg);
  padding: 20px;
  background: rgba(21, 11, 46, .5);
  border-top: 3px solid var(--cyan);
}

.page-about .about-note--art { border-top-color: var(--magenta); }
.page-about .about-note--dev { border-top-color: var(--mint); }
.page-about .about-note--ops { border-top-color: var(--orange); }

.page-about .about-note h3 {
  margin: 0 0 8px;
  font-size: 18px;
  color: var(--ink);
}

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

/* 玩法设计 */
.page-about .about-craft {
  display: grid;
  gap: 18px;
}

.page-about .about-craft-card {
  border: var(--about-edge);
  border-radius: var(--radius-lg);
  background: rgba(10, 6, 22, .72);
  padding: 22px;
  border-left: 3px solid var(--magenta);
}

.page-about .about-craft-card--flip {
  border-left-color: var(--cyan);
}

.page-about .about-craft-no {
  margin: 0 0 8px;
  font-size: 13px;
  letter-spacing: .2em;
  color: var(--yellow);
}

.page-about .about-craft-card h3 {
  margin: 0 0 10px;
  font-size: 20px;
  color: var(--ink);
}

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

.page-about .about-craft-foot {
  margin-top: 20px;
  font-size: 15px;
  color: var(--muted);
}

/* 本地服务 */
.page-about .about-region {
  display: grid;
  gap: var(--about-gap);
}

.page-about .about-region-map {
  position: relative;
  height: 260px;
  border-radius: var(--radius-lg);
  border: var(--about-edge);
  background:
    radial-gradient(80% 70% at 30% 20%, rgba(34, 230, 255, .12), transparent 60%),
    linear-gradient(180deg, rgba(21, 11, 46, .9), rgba(10, 6, 22, .95));
  overflow: hidden;
}

.page-about .about-region-map::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(42, 36, 64, .8) 1px, transparent 1px),
    linear-gradient(90deg, rgba(42, 36, 64, .8) 1px, transparent 1px);
  background-size: 46px 46px;
  opacity: .5;
}

.page-about .about-dot {
  position: absolute;
  left: var(--x);
  top: var(--y);
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--muted);
  transform: translate(-50%, -50%);
  box-shadow: 0 0 0 4px rgba(167, 157, 203, .14);
}

.page-about .about-dot--hot {
  width: 14px;
  height: 14px;
  background: var(--yellow);
  box-shadow: 0 0 0 6px rgba(255, 226, 74, .18), 0 0 18px rgba(255, 226, 74, .7);
}

.page-about .about-region-text .prose {
  margin-top: 0;
}

.page-about .about-city-list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-city-list li {
  display: grid;
  gap: 4px;
  border: var(--about-edge);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  background: rgba(21, 11, 46, .55);
}

.page-about .about-city-list b {
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-about .about-city-list span {
  font-size: 16px;
  color: var(--ink);
  line-height: 1.5;
}

.page-about .about-city-list em {
  font-style: normal;
  font-size: 14px;
  color: var(--muted);
}

.page-about .about-hint {
  margin-top: 20px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--muted);
}

.page-about .about-figure--region img {
  aspect-ratio: 3 / 2;
}

/* 反馈与排期 */
.page-about .about-feedback {
  display: grid;
  gap: var(--about-gap);
}

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

.page-about .about-flow-list li {
  position: relative;
  border: var(--about-edge);
  border-radius: var(--radius-lg);
  background: rgba(10, 6, 22, .68);
  padding: 20px 20px 20px 26px;
}

.page-about .about-flow-list li::before {
  content: "";
  position: absolute;
  left: 12px;
  top: 24px;
  bottom: 24px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), var(--magenta));
  border-radius: var(--pill);
}

.page-about .about-flow-list .mono {
  font-size: 13px;
  letter-spacing: .18em;
  color: var(--yellow);
}

.page-about .about-flow-list b {
  display: block;
  margin: 6px 0 8px;
  font-size: 18px;
  color: var(--ink);
}

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

.page-about .about-fold .label {
  display: block;
  margin-bottom: 12px;
}

.page-about .about-fold .fold + .fold {
  margin-top: 10px;
}

.page-about .about-fold .fold a {
  color: var(--cyan);
}

.page-about .about-cta {
  margin-top: clamp(28px, 5vw, 48px);
  display: grid;
  gap: 18px;
  border-radius: var(--radius-lg);
  padding: 26px;
  border: 1px solid var(--line);
  background:
    linear-gradient(120deg, rgba(34, 230, 255, .14), rgba(255, 63, 164, .14)),
    var(--panel);
}

.page-about .about-cta h3 {
  margin: 0 0 8px;
  font-size: clamp(20px, 2.6vw, 26px);
  color: var(--ink);
  line-height: 1.4;
}

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

.page-about .about-cta-acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* 桌面布局 */
@media (min-width: 860px) {
  .page-about .about-hero {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }

  .page-about .about-split {
    grid-template-columns: 7fr 5fr;
  }

  .page-about .about-chrono {
    grid-template-columns: 280px 1fr;
    align-items: start;
  }

  .page-about .about-chrono-index {
    position: sticky;
    top: calc(var(--header-h) + 18px);
  }

  .page-about .about-team {
    grid-template-columns: 5fr 7fr;
    align-items: center;
  }

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

  .page-about .about-craft-card--flip {
    margin-top: 34px;
  }

  .page-about .about-region {
    grid-template-columns: 5fr 7fr;
    align-items: start;
  }

  .page-about .about-region-map {
    height: 340px;
  }

  .page-about .about-figure--region {
    grid-column: 2 / 3;
  }

  .page-about .about-feedback {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }

  .page-about .about-cta {
    grid-template-columns: 1fr auto;
    align-items: center;
  }

  .page-about .about-cta-acts {
    flex-wrap: nowrap;
  }
}

@media (min-width: 1100px) {
  .page-about .about-split {
    grid-template-columns: 7fr 5fr;
    gap: clamp(32px, 5vw, 64px);
  }

  .page-about .about-region {
    grid-template-columns: 5fr 7fr;
    gap: clamp(32px, 5vw, 64px);
  }
}

/* 动效降级 */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-board,
  .page-about .about-orbit-node,
  .page-about .about-index-list a {
    transition: none;
  }

  .page-about .about-board:hover {
    transform: none;
  }

  .page-about .about-orbit-node:hover,
  .page-about .about-orbit-node:focus-visible {
    transform: translate(-50%, -50%) translate(var(--tx), var(--ty));
  }

  .page-about .about-index-list a:hover,
  .page-about .about-index-list a:focus-visible {
    transform: none;
  }
}

.page-about {
  --tx: inherit;
  --ty: inherit;
  --x: inherit;
  --y: inherit;
}