.page-about {
  --about-axis-w: 178px;
  --about-gutter: clamp(20px, 3vw, 50px);
  --about-cell-line: rgba(58, 74, 107, 0.44);
  display: block;
  background: var(--void);
  color: var(--ink);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding-block: clamp(24px, 4vw, 52px) clamp(30px, 4.5vw, 60px);
  background:
    radial-gradient(120% 90% at 10% -12%, rgba(33, 230, 210, 0.13), transparent 56%),
    radial-gradient(100% 84% at 94% 4%, rgba(122, 92, 255, 0.15), transparent 62%);
}

.page-about .about-hero .breadcrumb {
  margin-bottom: clamp(16px, 2.4vw, 26px);
}

.page-about .about-frame {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  padding: clamp(24px, 3.6vw, 48px) clamp(20px, 3.2vw, 46px) clamp(26px, 3.6vw, 44px);
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  background: linear-gradient(180deg, rgba(15, 23, 51, 0.88), rgba(7, 11, 28, 0.74));
  box-shadow: var(--shadow-deep);
}

.page-about .about-frame::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--orange), var(--cyan) 45%, var(--violet));
  opacity: 0.85;
}

.page-about .about-ruler {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 9px;
  background-image: repeating-linear-gradient(90deg, var(--line) 0 1px, transparent 1px 26px);
  opacity: 0.9;
  pointer-events: none;
}

.page-about .about-hero-main {
  min-width: 0;
  padding-top: 6px;
}

.page-about .about-hero-main .eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0 0 14px;
}

.page-about .about-hero-main h1 {
  margin: 0 0 18px;
  font-size: clamp(28px, 5.2vw, 52px);
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -0.02em;
  color: var(--cream-warm);
  max-width: 20em;
}

.page-about .about-lede {
  margin: 0;
  max-width: 36em;
  font-size: clamp(15.5px, 1.5vw, 17px);
  line-height: 1.85;
  color: var(--ink-dim);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(122px, 1fr));
  gap: 1px;
  margin-top: clamp(22px, 3vw, 34px);
  border: 1px solid var(--line-soft);
  border-radius: 9px;
  overflow: hidden;
  background: var(--line-soft);
}

.page-about .about-stat {
  background: rgba(7, 11, 28, 0.84);
  padding: 14px 16px 16px;
}

.page-about .about-stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(22px, 2.6vw, 30px);
  font-weight: 700;
  line-height: 1.15;
  color: var(--cyan);
  letter-spacing: -0.01em;
}

.page-about .about-stat:nth-child(2) .about-stat-num { color: var(--orange); }
.page-about .about-stat:nth-child(3) .about-stat-num { color: var(--violet); }

.page-about .about-stat-key {
  display: block;
  margin-top: 7px;
  font-size: 12.5px;
  line-height: 1.5;
  letter-spacing: 0.03em;
  color: var(--ink-faint);
}

.page-about .about-status {
  align-self: end;
  display: grid;
  gap: 10px;
  padding: 16px 18px;
  border: 1px solid var(--line-soft);
  border-radius: 10px;
  background: rgba(7, 11, 28, 0.76);
  backdrop-filter: blur(8px);
}

.page-about .about-status-title {
  margin: 0 0 2px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.page-about .about-status-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-dim);
}

.page-about .about-dot {
  flex: none;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 0 0 0 4px rgba(111, 227, 168, 0.16);
  animation: about-breathe 3.8s var(--ease) infinite;
}

.page-about .about-dot--cyan {
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(33, 230, 210, 0.16);
  animation-delay: 0.5s;
}

.page-about .about-dot--violet {
  background: var(--violet);
  box-shadow: 0 0 0 4px rgba(122, 92, 255, 0.16);
  animation-delay: 1s;
}

@keyframes about-breathe {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.42; }
}

/* ---------- 主体画布 ---------- */

.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  padding-block: clamp(42px, 6vw, 84px) clamp(56px, 8vw, 108px);
}

.page-about .about-axis {
  align-self: start;
  min-width: 0;
}

.page-about .about-axis-label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.page-about .about-axis-list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-axis-list::-webkit-scrollbar {
  display: none;
}

.page-about .about-axis-list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  padding: 8px 13px;
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  font-size: 13px;
  line-height: 1.4;
  text-decoration: none;
  color: var(--ink-dim);
  transition: color 0.24s var(--ease), border-color 0.24s var(--ease), background 0.24s var(--ease);
}

.page-about .about-axis-list a:hover,
.page-about .about-axis-list a:focus-visible {
  color: var(--cyan);
  border-color: rgba(33, 230, 210, 0.5);
  background: rgba(33, 230, 210, 0.07);
}

.page-about .about-axis-list .index-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
}

.page-about .about-canvas {
  display: grid;
  gap: clamp(46px, 6vw, 88px);
  min-width: 0;
}

.page-about .about-section {
  min-width: 0;
}

.page-about .about-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 6px 16px;
  margin-bottom: clamp(18px, 2.4vw, 28px);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-seq {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--orange);
}

.page-about .about-head h2 {
  margin: 0;
  font-size: clamp(23px, 3.2vw, 34px);
  font-weight: 800;
  line-height: 1.28;
  letter-spacing: -0.02em;
  color: var(--cream-warm);
}

.page-about .about-text {
  margin: 0 0 22px;
  max-width: 42em;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--ink-dim);
}

.page-about .about-text--tight {
  margin-top: 22px;
  margin-bottom: 0;
  font-size: 15px;
}

.page-about .about-text a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(33, 230, 210, 0.42);
  transition: border-color 0.24s var(--ease);
}

.page-about .about-text a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 奶油实色面板 ---------- */

.page-about .about-slab {
  padding: clamp(22px, 3vw, 40px);
  border-radius: 12px;
  background: var(--cream);
  color: var(--brown);
  box-shadow: var(--shadow-deep);
}

.page-about .about-slab--warm {
  background: var(--cream-warm);
}

.page-about .about-slab p {
  margin: 0 0 1.1em;
  max-width: 40em;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--brown);
}

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

.page-about .about-more {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid rgba(36, 28, 24, 0.16);
}

.page-about .about-more summary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--red);
}

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

.page-about .about-more summary::after {
  content: "+";
  font-size: 14px;
  line-height: 1;
}

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

.page-about .about-more p {
  margin: 14px 0 0;
}

/* ---------- 图 ---------- */

.page-about .about-figure {
  margin: 0 0 clamp(20px, 2.6vw, 30px);
  border: 1px solid var(--line-soft);
  border-radius: 12px;
  overflow: hidden;
  background: var(--deep);
}

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

.page-about .about-figure figcaption {
  padding: 11px 16px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--ink-faint);
}

/* ---------- 栏目矩阵 ---------- */

.page-about .about-matrix {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.page-about .about-cell {
  position: relative;
  display: grid;
  align-content: start;
  gap: 7px;
  min-height: 122px;
  padding: 15px 15px 17px;
  border: 1px solid var(--about-cell-line);
  border-radius: 10px;
  background: linear-gradient(180deg, rgba(15, 23, 51, 0.74), rgba(7, 11, 28, 0.58));
  transition: transform 0.28s var(--ease), border-color 0.28s var(--ease), background 0.28s var(--ease);
}

.page-about .about-cell:hover {
  transform: translateY(-3px);
  border-color: rgba(33, 230, 210, 0.55);
  background: linear-gradient(180deg, rgba(33, 230, 210, 0.1), rgba(7, 11, 28, 0.62));
}

.page-about .about-cell-idx {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--ink-faint);
}

.page-about .about-cell-title {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--cream-warm);
}

.page-about .about-cell-meta {
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-about .about-cell:nth-child(3n + 2) .about-cell-meta { color: var(--violet); }
.page-about .about-cell:nth-child(3n) .about-cell-meta { color: var(--mint); }

/* ---------- 覆盖与体验 ---------- */

.page-about .about-coverage {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  align-items: start;
}

.page-about .about-coverage-copy {
  min-width: 0;
}

.page-about .about-coverage-copy p {
  margin: 0 0 1.15em;
  max-width: 40em;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--ink-dim);
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--line-soft);
  border-radius: 9px;
  overflow: hidden;
  background: var(--line-soft);
}

.page-about .about-facts li {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 14px 16px;
  background: rgba(7, 11, 28, 0.82);
  font-size: 13px;
  line-height: 1.55;
  color: var(--ink-dim);
}

.page-about .about-fact-num {
  font-family: var(--font-mono);
  font-size: 21px;
  font-weight: 700;
  color: var(--orange);
  line-height: 1.1;
}

.page-about .about-facts li:nth-child(2) .about-fact-num { color: var(--cyan); }
.page-about .about-facts li:nth-child(3) .about-fact-num { color: var(--mint); }

.page-about .about-zonegrid {
  position: relative;
  aspect-ratio: 3 / 2;
  width: 100%;
  border: 1px solid var(--line-soft);
  border-radius: 10px;
  overflow: hidden;
  background-color: rgba(7, 11, 28, 0.62);
  background-image:
    repeating-linear-gradient(90deg, var(--line-soft) 0 1px, transparent 1px 12.5%),
    repeating-linear-gradient(0deg, var(--line-soft) 0 1px, transparent 1px 20%);
}

.page-about .about-zonegrid::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(58% 54% at 52% 44%, rgba(33, 230, 210, 0.26), transparent 72%),
    radial-gradient(34% 34% at 22% 74%, rgba(255, 122, 47, 0.3), transparent 72%),
    radial-gradient(30% 30% at 82% 22%, rgba(122, 92, 255, 0.26), transparent 72%);
}

/* ---------- 发展历程 ---------- */

.page-about .about-timeline {
  position: relative;
  margin: 0;
  padding: 4px 0 0 34px;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 10px;
  bottom: 14px;
  width: 1px;
  background: linear-gradient(180deg, var(--orange), var(--cyan) 48%, var(--violet));
  opacity: 0.75;
}

.page-about .about-node {
  position: relative;
  padding-bottom: clamp(24px, 3.2vw, 34px);
}

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

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: -34px;
  top: 7px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 122, 47, 0.16);
}

.page-about .about-node:nth-child(3)::before,
.page-about .about-node:nth-child(5)::before {
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(33, 230, 210, 0.16);
}

.page-about .about-node-key {
  display: block;
  margin-bottom: 5px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--ink-faint);
}

.page-about .about-node-title {
  margin: 0 0 7px;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--cream-warm);
}

.page-about .about-node p {
  margin: 0;
  max-width: 40em;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink-dim);
}

/* ---------- 团队与运营 ---------- */

.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 34px);
  align-items: start;
}

.page-about .about-rhythm {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: rgba(36, 28, 24, 0.16);
  border-top: 1px solid rgba(36, 28, 24, 0.16);
}

.page-about .about-rhythm li {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr);
  gap: 14px;
  padding: 12px 0;
  background: transparent;
  border-bottom: 1px solid rgba(36, 28, 24, 0.12);
}

.page-about .about-rhythm li:last-child {
  border-bottom: 0;
}

.page-about .about-rhythm-key {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--red);
  padding-top: 2px;
}

.page-about .about-rhythm-val {
  font-size: 15px;
  line-height: 1.75;
  color: var(--brown);
}

.page-about .about-figure--tall {
  margin-bottom: 0;
}

/* ---------- 协作生态 ---------- */

.page-about .about-eco-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin: 4px 0 0;
}

.page-about .about-eco-card {
  padding: clamp(18px, 2.4vw, 26px);
  border: 1px solid var(--line-soft);
  border-radius: 11px;
  background: rgba(15, 23, 51, 0.6);
  backdrop-filter: blur(8px);
  transition: border-color 0.26s var(--ease), background 0.26s var(--ease);
}

.page-about .about-eco-card:hover {
  border-color: rgba(122, 92, 255, 0.55);
  background: rgba(15, 23, 51, 0.78);
}

.page-about .about-eco-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(28px, 3.6vw, 38px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--violet);
}

.page-about .about-eco-card h3 {
  margin: 10px 0 8px;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--cream-warm);
}

.page-about .about-eco-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-dim);
}

/* ---------- 下一步 ---------- */

.page-about .about-next {
  padding: clamp(22px, 3vw, 34px) 0 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-next-title {
  margin: 0 0 20px;
  font-size: clamp(19px, 2.4vw, 24px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--cream-warm);
}

.page-about .about-next-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
}

.page-about .about-next-card {
  display: grid;
  gap: 6px;
  padding: 17px 18px;
  border: 1px solid var(--line-soft);
  border-radius: 10px;
  text-decoration: none;
  background: rgba(7, 11, 28, 0.55);
  transition: transform 0.26s var(--ease), border-color 0.26s var(--ease), background 0.26s var(--ease);
}

.page-about .about-next-card:hover,
.page-about .about-next-card:focus-visible {
  transform: translateY(-3px);
  border-color: rgba(255, 122, 47, 0.55);
  background: rgba(255, 122, 47, 0.08);
}

.page-about .about-next-card .index-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--orange);
}

.page-about .about-next-name {
  font-size: 16.5px;
  font-weight: 600;
  color: var(--cream-warm);
}

.page-about .about-next-desc {
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-faint);
}

/* ---------- 断点 ---------- */

@media (min-width: 620px) {
  .page-about .about-matrix {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-about .about-coverage {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    gap: 36px;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  }
}

@media (min-width: 960px) {
  .page-about .about-body {
    grid-template-columns: var(--about-axis-w) minmax(0, 1fr);
    gap: var(--about-gutter);
  }

  .page-about .about-axis {
    position: sticky;
    top: calc(var(--header-h) + 26px);
  }

  .page-about .about-axis-list {
    display: block;
    overflow: visible;
    padding: 0;
  }

  .page-about .about-axis-list li + li {
    margin-top: 2px;
  }

  .page-about .about-axis-list a {
    display: flex;
    width: 100%;
    padding: 9px 10px 9px 14px;
    border: 0;
    border-left: 2px solid var(--line-soft);
    border-radius: 0;
    background: none;
  }

  .page-about .about-axis-list a:hover,
  .page-about .about-axis-list a:focus-visible {
    border-left-color: var(--orange);
    background: rgba(255, 122, 47, 0.06);
    color: var(--cream-warm);
  }
}

@media (min-width: 1080px) {
  .page-about .about-frame {
    grid-template-columns: minmax(0, 1fr) 254px;
    gap: 34px;
    align-items: end;
  }
}

@media (min-width: 1240px) {
  .page-about .about-matrix {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-eco-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (max-width: 420px) {
  .page-about .about-rhythm li {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

  .page-about .about-cell {
    min-height: 108px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-dot {
    animation: none;
  }

  .page-about .about-cell,
  .page-about .about-next-card,
  .page-about .about-eco-card {
    transition: none;
  }

  .page-about .about-cell:hover,
  .page-about .about-next-card:hover,
  .page-about .about-next-card:focus-visible {
    transform: none;
  }
}