/* ===== 品牌自述页 · 专属样式（作用域 .page-about） ===== */

.page-about {
  --about-line: rgba(199, 206, 216, .14);
  --about-line-soft: rgba(199, 206, 216, .08);
  position: relative;
  overflow-x: hidden;
  background: var(--ink-900);
  color: var(--text);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(102px, 17vw, 178px) 0 clamp(40px, 6vw, 72px);
  background:
    radial-gradient(760px 480px at 84% -14%, rgba(79, 227, 193, .18), transparent 64%),
    radial-gradient(620px 400px at 2% 14%, rgba(255, 138, 61, .11), transparent 62%),
    linear-gradient(180deg, #05090F 0%, var(--ink-900) 56%, var(--ink-800) 100%);
  border-bottom: 1px solid var(--about-line);
}

.page-about .breadcrumb {
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--text-dim);
}

.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(138, 154, 180, .6);
}

.page-about .breadcrumb a {
  color: var(--silver);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--mint);
  border-bottom-color: var(--mint);
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 56px);
  align-items: end;
}

.page-about .about-hero-copy h1 {
  margin: 18px 0 0;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(34px, 8.4vw, 76px);
  line-height: 1.06;
  letter-spacing: -.02em;
  color: #F6F9FD;
}

.page-about .about-lede {
  margin: 22px 0 0;
  max-width: 42ch;
  font-size: 17px;
  line-height: 1.85;
  color: var(--silver);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.page-about .about-hero-side {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-about .floor-ladder {
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.page-about .floor-ladder span {
  display: block;
  height: clamp(22px, 4.4vw, 32px);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(79, 227, 193, .3);
  background: linear-gradient(90deg, rgba(79, 227, 193, .28), rgba(79, 227, 193, 0) 88%);
}

.page-about .floor-ladder span:nth-child(1) { width: 100%; }
.page-about .floor-ladder span:nth-child(2) { width: 88%; }
.page-about .floor-ladder span:nth-child(3) { width: 76%; }
.page-about .floor-ladder span:nth-child(4) { width: 64%; }

.page-about .floor-ladder span:nth-child(5) {
  width: 52%;
  border-color: rgba(255, 138, 61, .45);
  background: linear-gradient(90deg, rgba(255, 138, 61, .42), rgba(255, 138, 61, 0) 88%);
}

.page-about .about-hero-note {
  margin: 0;
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--text-dim);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(36px, 6vw, 64px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--about-line);
  border: 1px solid var(--about-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.page-about .about-stats li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px clamp(16px, 3vw, 26px);
  background: rgba(14, 23, 40, .92);
}

.page-about .stat-num {
  font-family: var(--font-narrow);
  font-size: clamp(30px, 6vw, 42px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: .04em;
  color: var(--mint);
}

.page-about .about-stats li:nth-child(3) .stat-num,
.page-about .about-stats li:nth-child(4) .stat-num {
  color: var(--orange);
}

.page-about .stat-label {
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--text-dim);
}

/* ---------- 纵向叙事主干 ---------- */
.page-about .about-body {
  background:
    linear-gradient(180deg, var(--ink-800) 0%, var(--ink-900) 42%, var(--ink-900) 100%);
}

.page-about .about-rail {
  position: relative;
}

.page-about .about-section {
  padding: clamp(46px, 7.5vw, 86px) 0;
  border-top: 1px solid var(--about-line-soft);
}

.page-about .about-section:first-child {
  border-top: 0;
}

.page-about .about-num {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-narrow);
  font-size: clamp(50px, 12vw, 92px);
  font-weight: 700;
  line-height: .82;
  letter-spacing: .04em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(79, 227, 193, .5);
}

.page-about .about-section-head h2 {
  margin: 14px 0 0;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(26px, 5.4vw, 46px);
  line-height: 1.18;
  letter-spacing: -.01em;
  color: #F2F6FC;
}

.page-about .about-lead-in {
  margin: 20px 0 0;
  color: var(--silver);
}

.page-about .prose {
  font-size: 17px;
  line-height: 1.85;
  max-width: 42ch;
  color: var(--silver);
}

.page-about .prose p {
  margin: 0 0 16px;
}

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

.page-about .about-note {
  margin: 20px 0 0;
  font-size: 14px;
  line-height: 1.8;
  max-width: 46ch;
}

.page-about .about-cols {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 48px);
  margin-top: clamp(24px, 4vw, 40px);
  align-items: start;
}

.page-about .about-figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 22px 60px rgba(0, 0, 0, .45);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 3 / 2;
  filter: saturate(.92) contrast(1.04);
}

/* ---------- 五层栏目 ---------- */
.page-about .floor-list {
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-about .floor-row {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  padding: 20px clamp(16px, 3vw, 26px);
  border-radius: var(--radius-md);
  background: var(--panel);
  border: 1px solid var(--about-line);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}

.page-about .floor-row:hover {
  transform: translateY(-6px);
  border-color: rgba(79, 227, 193, .42);
  box-shadow: 0 18px 46px rgba(79, 227, 193, .12);
}

.page-about .floor-code {
  font-family: var(--font-narrow);
  font-size: 28px;
  font-weight: 700;
  letter-spacing: .06em;
  line-height: 1;
  color: var(--mint);
}

.page-about .floor-row:last-child .floor-code {
  color: var(--orange);
}

.page-about .floor-row-body h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: .01em;
  color: #EFF4FB;
}

.page-about .floor-row-body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-dim);
  max-width: 54ch;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.page-about .team-bar {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .team-seg {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 20px;
  border-radius: var(--pill);
  background: linear-gradient(120deg, rgba(23, 26, 33, .96), rgba(14, 23, 40, .96));
  border: 1px solid var(--about-line);
  cursor: default;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .team-seg:hover,
.page-about .team-seg:focus-visible {
  border-color: rgba(79, 227, 193, .5);
  transform: translateY(-2px);
  outline: none;
}

.page-about .team-seg-num {
  font-family: var(--font-narrow);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: .04em;
  line-height: 1;
  color: var(--mint);
}

.page-about .team-seg:nth-child(4) .team-seg-num,
.page-about .team-seg:nth-child(5) .team-seg-num {
  color: var(--orange);
}

.page-about .team-seg-name {
  font-size: 14px;
  letter-spacing: .08em;
  color: var(--silver);
}

.page-about .team-tip {
  position: absolute;
  left: 0;
  top: calc(100% + 8px);
  z-index: 3;
  width: max-content;
  max-width: min(300px, 78vw);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  background: var(--paper);
  color: #16202E;
  font-size: 12.5px;
  line-height: 1.6;
  letter-spacing: .01em;
  box-shadow: 0 16px 36px rgba(0, 0, 0, .5);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease),
    visibility var(--dur) var(--ease);
}

.page-about .team-seg:hover .team-tip,
.page-about .team-seg:focus-visible .team-tip,
.page-about .team-seg:focus-within .team-tip {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* ---------- 长期跟队 ---------- */
.page-about .follow-points {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .follow-points li {
  position: relative;
  padding: 20px clamp(16px, 3vw, 24px);
  border-radius: var(--radius-md);
  background: var(--paper);
  color: #16202E;
  box-shadow: 0 14px 36px rgba(0, 0, 0, .32);
  transition: transform var(--dur) var(--ease);
}

.page-about .follow-points li:hover {
  transform: translateY(-5px);
}

.page-about .follow-num {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-narrow);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: .06em;
  color: #C2521E;
}

.page-about .follow-points strong {
  display: block;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: .01em;
}

.page-about .follow-points p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: #3E4A5C;
}

/* ---------- 城市网络 ---------- */
.page-about .about-network {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 56px);
  margin-top: clamp(26px, 4vw, 42px);
  align-items: center;
}

.page-about .network-copy .prose + .prose {
  margin-top: 16px;
}

.page-about .network-legend {
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-about .network-legend li {
  display: grid;
  grid-template-columns: auto auto 1fr;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--about-line-soft);
}

.page-about .legend-key {
  width: 10px;
  height: 10px;
  border-radius: var(--pill);
  align-self: center;
}

.page-about .legend-key--venue { background: var(--mint); }
.page-about .legend-key--club { background: var(--orange); }
.page-about .legend-key--media { background: var(--silver); }

.page-about .legend-value {
  font-family: var(--font-narrow);
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: .04em;
  color: #F2F6FC;
}

.page-about .legend-name {
  font-size: 14px;
  letter-spacing: .05em;
  color: var(--text-dim);
}

.page-about .network-visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.page-about .net-map {
  display: block;
  width: 100%;
  max-width: 340px;
  height: auto;
}

.page-about .net-ring {
  fill: none;
  stroke: rgba(199, 206, 216, .16);
  stroke-width: 1;
}

.page-about .net-dots {
  fill: none;
  stroke-width: 4;
  stroke-linecap: round;
}

.page-about .net-dots--venue { stroke: var(--mint); opacity: .95; }
.page-about .net-dots--club { stroke: var(--orange); opacity: .8; }
.page-about .net-dots--media { stroke: var(--silver); opacity: .55; }

.page-about .net-core {
  fill: var(--mint);
  filter: drop-shadow(0 0 10px rgba(79, 227, 193, .7));
}

.page-about .network-caption {
  margin: 0;
  font-size: 12.5px;
  letter-spacing: .1em;
}

/* ---------- 发展阶段 ---------- */
.page-about .stage-stack {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: clamp(26px, 4vw, 42px);
}

.page-about .stage-card {
  border-radius: var(--radius-lg);
  background: var(--paper);
  color: #16202E;
  box-shadow: 0 18px 44px rgba(0, 0, 0, .38);
  overflow: hidden;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .stage-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 24px 56px rgba(0, 0, 0, .46);
}

.page-about .stage-card summary {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas:
    "idx title"
    "idx sub";
  align-items: center;
  column-gap: 14px;
  padding: 20px clamp(16px, 3vw, 26px);
  cursor: pointer;
  list-style: none;
}

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

.page-about .stage-idx {
  grid-area: idx;
  font-family: var(--font-narrow);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: .05em;
  color: #C2521E;
}

.page-about .stage-title {
  grid-area: title;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: .01em;
}

.page-about .stage-sub {
  grid-area: sub;
  font-size: 13px;
  letter-spacing: .05em;
  color: #5A6678;
}

.page-about .stage-card[open] summary {
  border-bottom: 1px solid var(--paper-edge);
}

.page-about .stage-body {
  padding: 16px clamp(16px, 3vw, 26px) 22px;
}

.page-about .stage-body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: #3E4A5C;
}

/* ---------- 底部去向 ---------- */
.page-about .about-section--cta {
  border-bottom: 1px solid var(--about-line-soft);
}

.page-about .cta-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: clamp(26px, 4vw, 40px);
}

.page-about .cta-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px clamp(16px, 3vw, 26px);
  border-radius: var(--radius-md);
  border: 1px solid var(--about-line);
  background: linear-gradient(140deg, rgba(23, 26, 33, .96), rgba(7, 12, 24, .96));
  text-decoration: none;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}

.page-about .cta-card:hover,
.page-about .cta-card:focus-visible {
  transform: translateY(-6px);
  border-color: rgba(255, 138, 61, .5);
  box-shadow: 0 20px 48px rgba(255, 138, 61, .14);
  outline: none;
}

.page-about .cta-floor {
  font-family: var(--font-narrow);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--orange);
}

.page-about .cta-title {
  font-size: 17px;
  font-weight: 800;
  letter-spacing: .01em;
  color: #F1F5FB;
}

.page-about .cta-desc {
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-dim);
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

@media (min-width: 860px) {
  .page-about .team-bar {
    flex-direction: row;
    flex-wrap: nowrap;
    gap: 8px;
  }

  .page-about .team-seg {
    flex: var(--grow) 1 0%;
    min-width: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding: 20px 18px;
    border-radius: var(--radius-md);
  }

  .page-about .team-seg-name {
    font-size: 13px;
    letter-spacing: .04em;
  }
}

@media (min-width: 940px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(260px, .62fr);
  }

  .page-about .about-rail {
    padding-left: 78px;
  }

  .page-about .about-rail::before {
    content: "";
    position: absolute;
    left: 28px;
    top: 0;
    bottom: 0;
    width: 2px;
    background-image:
      repeating-linear-gradient(to bottom, rgba(79, 227, 193, .55) 0 3px, transparent 3px 32px);
    opacity: .5;
  }

  .page-about .about-cols {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: clamp(32px, 5vw, 64px);
  }

  .page-about .about-cols--reverse {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  }

  .page-about .about-network {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
  }

  .page-about .network-visual {
    justify-content: center;
  }

  .page-about .stage-stack {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
    align-items: start;
  }

  .page-about .stage-card:nth-child(2) {
    transform: translateY(30px);
  }

  .page-about .stage-card:nth-child(3) {
    transform: translateY(-10px);
  }

  .page-about .stage-card:nth-child(2):hover {
    transform: translateY(24px);
  }

  .page-about .stage-card:nth-child(3):hover {
    transform: translateY(-16px);
  }

  .page-about .cta-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (min-width: 1160px) {
  .page-about .floor-list {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 14px;
    align-items: stretch;
  }

  .page-about .floor-row {
    grid-template-columns: 1fr;
    gap: 12px;
    align-content: start;
  }

  .page-about .floor-row:nth-child(even) {
    margin-top: 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .floor-row,
  .page-about .team-seg,
  .page-about .follow-points li,
  .page-about .stage-card,
  .page-about .cta-card,
  .page-about .team-tip {
    transition: none;
  }

  .page-about .floor-row:hover,
  .page-about .team-seg:hover,
  .page-about .follow-points li:hover,
  .page-about .cta-card:hover {
    transform: none;
  }

  .page-about .stage-card:nth-child(2),
  .page-about .stage-card:nth-child(3) {
    transform: none;
  }
}
<<<END>>>

.page-about {
  --grow: inherit;
}