/* ===== 品牌坐标 / 页面专属样式 ===== */
.page-about {
  background: var(--night);
  color: var(--line);
  --about-axis: 92px;
  --about-pad: clamp(52px, 8vw, 104px);
}

.page-about .panel {
  padding-block: var(--about-pad);
}

.page-about .panel--night {
  background: var(--night);
  color: var(--line);
}

.page-about .panel--turf {
  background: var(--turf);
  color: var(--line);
}

.page-about .panel--stand {
  background: var(--line);
  color: var(--ink);
}

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

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -18%;
  top: 14%;
  width: 54%;
  aspect-ratio: 1;
  border: 1px solid var(--line-faint);
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero .container {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(30px, 5vw, 64px);
  align-items: start;
  margin-top: clamp(24px, 4vw, 44px);
}

.page-about .about-hero__copy .display {
  margin: clamp(10px, 1.6vw, 18px) 0 0;
  max-width: 16em;
}

.page-about .about-hero__copy .lead {
  margin: clamp(16px, 2.4vw, 26px) 0 0;
  max-width: 34em;
}

.page-about .about-stats {
  list-style: none;
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-faint);
  border-block: 1px solid var(--line-soft);
}

.page-about .about-stats li {
  background: var(--night);
  padding: 16px 14px 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-about .about-stats__num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.2vw, 38px);
  font-weight: 700;
  line-height: 1;
  color: var(--neon);
}

.page-about .about-stats__label {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--silver);
}

.page-about .about-hero__cta {
  margin-top: clamp(24px, 4vw, 38px);
}

.page-about .about-hero__figure {
  margin: 0;
  position: relative;
}

.page-about .about-hero__figure::before {
  display: none;
}

/* ---------- 通用章节骨架 ---------- */
.page-about .about-sec__grid {
  display: grid;
  gap: 0;
}

.page-about .about-sec__axis {
  display: none;
}

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

.page-about .about-sec__body .h2 {
  margin: clamp(10px, 1.4vw, 16px) 0 0;
  max-width: 18em;
}

.page-about .about-sec__body .prose {
  margin: clamp(16px, 2vw, 24px) 0 0;
  max-width: 40em;
}

.page-about .about-sec__body .prose + .prose {
  margin-top: clamp(12px, 1.6vw, 18px);
}

.page-about .about-slogan {
  margin: clamp(32px, 5vw, 56px) 0 0;
  padding-top: clamp(18px, 2.6vw, 30px);
  border-top: 1px solid var(--line-soft);
  font-size: clamp(34px, 8vw, 86px);
  font-weight: 900;
  font-style: italic;
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--neon);
  word-break: break-word;
}

/* ---------- 团队比例条 ---------- */
.page-about .about-roster {
  list-style: none;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-roster__row {
  padding: 18px 0 20px;
  border-bottom: 1px solid var(--line-faint);
}

.page-about .about-roster__top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
}

.page-about .about-roster__name {
  font-size: 17px;
  font-weight: 700;
}

.page-about .about-roster__num {
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--neon);
}

.page-about .about-roster__bar {
  display: block;
  height: 4px;
  margin: 12px 0 10px;
  background: var(--line-faint);
  overflow: hidden;
}

.page-about .about-roster__bar i {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--neon), rgba(127, 224, 59, 0.3));
}

.page-about .about-roster__row:nth-child(1) .about-roster__bar i { width: 45%; }
.page-about .about-roster__row:nth-child(2) .about-roster__bar i { width: 28%; }
.page-about .about-roster__row:nth-child(3) .about-roster__bar i { width: 27%; }

.page-about .about-roster__role {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--silver);
}

/* ---------- 栏目索引（浅色面板） ---------- */
.page-about .about-channels {
  list-style: none;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(16, 21, 19, 0.14);
  border: 1px solid rgba(16, 21, 19, 0.14);
}

.page-about .about-channels li {
  background: var(--line);
  padding: 13px 12px 14px;
  display: flex;
  align-items: baseline;
  gap: 9px;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  min-width: 0;
}

.page-about .about-channels__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--tactical);
  flex: 0 0 auto;
}

.page-about .about-formats {
  display: grid;
  gap: 1px;
  margin-top: clamp(28px, 4vw, 44px);
  background: rgba(16, 21, 19, 0.14);
  border: 1px solid rgba(16, 21, 19, 0.14);
}

.page-about .about-format {
  background: var(--stand);
  padding: clamp(18px, 2.6vw, 26px);
}

.page-about .about-format__tag {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--turf);
}

.page-about .about-format .h3 {
  margin: 10px 0 0;
  color: var(--ink);
}

.page-about .about-format p:last-child {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(16, 21, 19, 0.78);
}

.page-about .about-sources {
  margin-top: clamp(28px, 4vw, 44px);
  padding: clamp(18px, 2.6vw, 26px);
  background:
    linear-gradient(rgba(255, 106, 26, 0.05), rgba(255, 106, 26, 0.05)),
    var(--ink);
  border-left: 3px solid var(--neon);
}

.page-about .about-sources__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--neon);
}

.page-about .about-sources__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244, 247, 240, 0.86);
  max-width: 46em;
}

/* ---------- 本地节点 ---------- */
.page-about .about-nodes {
  list-style: none;
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-faint);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-nodes__item {
  background: var(--turf);
  padding: 18px 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .about-nodes__city {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--neon);
}

.page-about .about-nodes__desc {
  font-size: 15px;
  line-height: 1.75;
  color: rgba(244, 247, 240, 0.84);
}

.page-about .about-figure {
  margin: clamp(26px, 4vw, 44px) 0 0;
}

/* ---------- 合作标签墙 ---------- */
.page-about .about-wall {
  list-style: none;
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-wall li {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  padding: 11px 14px;
  border: 1px solid var(--line-soft);
  background: rgba(127, 224, 59, 0.06);
  font-size: 14px;
  font-weight: 600;
  color: var(--line);
  transition: border-color 320ms var(--ease), background-color 320ms var(--ease);
}

.page-about .about-wall li:nth-child(3n + 2) { transition-delay: 70ms; }
.page-about .about-wall li:nth-child(3n + 3) { transition-delay: 140ms; }

.page-about .about-wall li:hover,
.page-about .about-wall li:focus-within {
  border-color: var(--neon);
  background: var(--mist);
}

.page-about .about-wall__meta {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--silver);
}

.page-about .about-award {
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding-top: clamp(18px, 2.4vw, 26px);
  border-top: 1px solid var(--line-faint);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  font-size: 16px;
  font-weight: 700;
  color: var(--neon);
}

.page-about .about-award__tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  padding: 5px 9px;
  border: 1px solid var(--neon);
  color: var(--neon);
}

/* ---------- 版本时间轴 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-timeline > li {
  border-bottom: 1px solid var(--line-faint);
}

.page-about .about-node summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
  padding: 16px 2px;
  cursor: pointer;
  list-style: none;
  transition: background-color 260ms var(--ease), padding-left 260ms var(--ease);
}

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

.page-about .about-node summary::marker {
  content: "";
}

.page-about .about-node summary:hover {
  background: var(--mist);
  padding-left: 12px;
}

.page-about .about-node summary:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 2px;
}

.page-about .about-node__year {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--silver);
  flex: 0 0 auto;
}

.page-about .about-node__ver {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  padding: 3px 7px;
  border: 1px solid rgba(127, 224, 59, 0.4);
  color: var(--neon);
  flex: 0 0 auto;
}

.page-about .about-node__title {
  font-size: 17px;
  font-weight: 700;
  color: var(--line);
  flex: 1 1 auto;
  min-width: 0;
}

.page-about .about-node summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--neon);
  margin-left: auto;
  flex: 0 0 auto;
}

.page-about .about-node[open] summary::after {
  content: "−";
}

.page-about .about-node[open] summary {
  background: var(--mist);
  padding-left: 12px;
}

.page-about .about-node > p {
  margin: 0;
  padding: 0 12px 20px;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244, 247, 240, 0.84);
  max-width: 44em;
}

/* ---------- 结尾动作 ---------- */
.page-about .about-close__inner .prose {
  margin: clamp(16px, 2vw, 22px) 0 0;
  max-width: 42em;
  color: rgba(244, 247, 240, 0.86);
}

.page-about .about-close__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(24px, 3.4vw, 36px);
}

.page-about .about-close__links {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
}

.page-about .about-close__links a {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--silver);
  text-decoration: none;
  border-bottom: 1px solid var(--line-faint);
  padding-bottom: 3px;
  transition: color 220ms var(--ease), border-color 220ms var(--ease);
}

.page-about .about-close__links a:hover,
.page-about .about-close__links a:focus-visible {
  color: var(--neon);
  border-color: var(--neon);
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 640px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

  .page-about .about-nodes__item {
    border-top: 2px solid var(--neon);
  }
}

@media (min-width: 860px) {
  .page-about .about-sec__grid {
    grid-template-columns: var(--about-axis) minmax(0, 1fr);
    gap: clamp(24px, 4vw, 60px);
  }

  .page-about .about-sec__axis {
    display: block;
    position: relative;
    border-left: 1px solid var(--line-faint);
    padding: 6px 0 0 clamp(12px, 1.6vw, 20px);
  }

  .page-about .about-sec__axis::before {
    content: "";
    position: absolute;
    left: -3px;
    top: 14px;
    width: 5px;
    height: 5px;
    background: var(--neon);
  }

  .page-about .about-sec__axis span {
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.12em;
    color: var(--silver);
  }

  .page-about .about-sec__axis--dark {
    border-left-color: rgba(16, 21, 19, 0.2);
  }

  .page-about .about-sec__axis--dark::before {
    background: var(--turf);
  }

  .page-about .about-sec__axis--dark span {
    color: var(--tactical);
  }

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

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

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.72fr);
  }

  .page-about .about-hero__figure::before {
    display: block;
    content: "";
    position: absolute;
    inset: -14px -14px 14px 14px;
    border-top: 1px solid var(--neon);
    border-right: 1px solid var(--line-soft);
    pointer-events: none;
  }

  .page-about .about-channels {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-wall li,
  .page-about .about-node summary,
  .page-about .about-close__links a {
    transition: none;
  }
}