.page-about {
  --about-gutter: clamp(20px, 4vw, 56px);
  --about-card: #0A1027;
  --about-text: #D6DEEC;
  --about-dim: #96A7C6;
  --about-hair: rgba(138, 160, 201, 0.22);
  background: var(--c-deep);
  color: var(--c-fog);
}

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

/* ---------- Hero ---------- */

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

.page-about .about-hero-visual {
  position: relative;
  height: clamp(230px, 46vw, 540px);
  overflow: hidden;
  border-bottom: 1px solid var(--about-hair);
}

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

.page-about .about-hero-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(2, 4, 10, 0.58) 0%, rgba(7, 11, 30, 0.28) 42%, rgba(7, 11, 30, 0.96) 100%),
    linear-gradient(100deg, rgba(123, 92, 255, 0.26) 0%, rgba(7, 11, 30, 0) 55%);
  pointer-events: none;
}

.page-about .about-hero-tag {
  position: absolute;
  z-index: 2;
  left: clamp(20px, 4vw, 56px);
  bottom: 20px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--c-cyan);
  border: 1px solid rgba(46, 242, 214, 0.42);
  background: rgba(2, 4, 10, 0.62);
  padding: 7px 12px;
}

.page-about .about-hero-copy {
  position: relative;
  z-index: 3;
  margin-top: clamp(-40px, -4vw, -18px);
  padding-bottom: clamp(32px, 5vw, 64px);
}

.page-about .about-hero-copy .breadcrumb {
  margin-bottom: 18px;
}

.page-about .about-hero-copy h1 {
  font-family: var(--font-title);
  font-size: clamp(30px, 5.6vw, 60px);
  line-height: 1.14;
  letter-spacing: -0.012em;
  font-weight: 800;
  color: #FFFFFF;
  margin: 12px 0 0;
  max-width: 22ch;
}

.page-about .about-lead {
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  max-width: 62ch;
  font-size: clamp(15.5px, 1.3vw, 18px);
  line-height: 1.9;
  color: var(--about-text);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-hair);
  border: 1px solid var(--about-hair);
  margin-top: clamp(26px, 4vw, 46px);
}

.page-about .about-stat {
  background: var(--c-deep);
  padding: clamp(14px, 1.8vw, 22px) clamp(14px, 1.8vw, 22px);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .stat-num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1;
  color: var(--c-gold);
  letter-spacing: -0.02em;
}

.page-about .stat-label {
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--about-dim);
}

/* ---------- Body shell ---------- */

.page-about .about-body {
  max-width: var(--shell-w);
  margin: 0 auto;
  padding: clamp(44px, 6vw, 88px) var(--about-gutter) clamp(56px, 7vw, 110px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 64px);
  align-items: start;
}

/* ---------- TOC ---------- */

.page-about .about-toc {
  position: sticky;
  top: var(--header-h);
  z-index: 6;
  background: var(--c-deep);
  border-bottom: 1px solid var(--about-hair);
  padding: 8px 0;
}

.page-about .about-toc-title {
  display: none;
}

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

.page-about .toc-list li {
  flex: 0 0 auto;
}

.page-about .toc-link {
  display: block;
  white-space: nowrap;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.02em;
  padding: 7px 12px;
  border: 1px solid var(--about-hair);
  color: var(--about-dim);
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.page-about .toc-link:hover,
.page-about .toc-link:focus-visible {
  color: var(--c-cyan);
  border-color: rgba(46, 242, 214, 0.55);
}

.page-about .toc-link.is-active {
  color: var(--c-deep);
  background: var(--c-cyan);
  border-color: var(--c-cyan);
}

/* ---------- Flow & sections ---------- */

.page-about .about-flow {
  display: flex;
  flex-direction: column;
  gap: clamp(56px, 8vw, 116px);
  min-width: 0;
}

.page-about .about-section {
  scroll-margin-top: calc(var(--header-h) + 90px);
  min-width: 0;
}

.page-about .sec-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--about-hair);
  margin-bottom: clamp(20px, 3vw, 34px);
}

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

.page-about .sec-title {
  font-family: var(--font-title);
  font-size: clamp(23px, 3.2vw, 38px);
  line-height: 1.22;
  letter-spacing: -0.01em;
  font-weight: 800;
  color: #FFFFFF;
  margin: 0;
}

.page-about .about-section-body {
  display: flex;
  flex-direction: column;
  gap: clamp(14px, 2vw, 22px);
  max-width: 72ch;
}

.page-about .about-section-body p {
  margin: 0;
  font-size: clamp(15px, 1.15vw, 17px);
  line-height: 1.92;
  color: var(--about-text);
}

/* ---------- Quote panel ---------- */

.page-about .paper-panel.yunnan-quote {
  margin: clamp(8px, 1.4vw, 16px) 0 0;
  background: var(--c-paper);
  color: var(--c-inktext);
  border-left: 3px solid var(--c-gold);
  padding: clamp(22px, 3vw, 36px);
}

.page-about .yunnan-quote blockquote {
  margin: 0;
  font-family: var(--font-title);
  font-size: clamp(16px, 1.5vw, 21px);
  line-height: 1.72;
  font-weight: 700;
  letter-spacing: -0.005em;
}

.page-about .yunnan-quote figcaption {
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: rgba(23, 27, 44, 0.62);
}

/* ---------- Figures ---------- */

.page-about .figure {
  margin: 0;
  border: 1px solid var(--about-hair);
  background: var(--about-card);
  overflow: hidden;
}

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

.page-about .figure--panorama img {
  aspect-ratio: 14 / 9;
}

.page-about .figure-caption {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.02em;
  color: var(--about-dim);
  padding: 12px clamp(14px, 1.8vw, 20px);
  border-top: 1px solid var(--about-hair);
}

.page-about .about-section .figure--panorama {
  margin-bottom: clamp(20px, 3vw, 30px);
}

/* ---------- Content lines ---------- */

.page-about .line-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--about-hair);
  border: 1px solid var(--about-hair);
  margin-top: clamp(24px, 3.4vw, 40px);
}

.page-about .line-card {
  background: var(--about-card);
  padding: clamp(20px, 2.6vw, 32px);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-about .line-card--video {
  border-top: 2px solid var(--c-cyan);
}

.page-about .line-card--game {
  border-top: 2px solid var(--c-magenta);
}

.page-about .line-card--film {
  border-top: 2px solid var(--c-gold);
}

.page-about .line-code {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--about-dim);
}

.page-about .line-title {
  font-family: var(--font-title);
  font-size: clamp(19px, 1.9vw, 23px);
  font-weight: 800;
  color: #FFFFFF;
  margin: 0;
  letter-spacing: -0.005em;
}

.page-about .line-desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--about-dim);
}

.page-about .line-list {
  list-style: none;
  margin: 4px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .line-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--about-text);
}

.page-about .line-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 9px;
  height: 1px;
  background: var(--c-cyan);
}

.page-about .line-card--game .line-list li::before {
  background: var(--c-magenta);
}

.page-about .line-card--film .line-list li::before {
  background: var(--c-gold);
}

/* ---------- Timeline ---------- */

.page-about .timeline {
  list-style: none;
  margin: clamp(24px, 3.4vw, 40px) 0 0;
  padding: 0;
}

.page-about .tl-item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 0 0 clamp(26px, 3.4vw, 42px) 26px;
  border-left: 1px solid var(--about-hair);
  transition: border-color 0.25s ease;
}

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

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 5px;
  width: 9px;
  height: 9px;
  background: var(--c-deep);
  border: 2px solid var(--c-cyan);
  border-radius: 50%;
  transition: background-color 0.25s ease, box-shadow 0.25s ease;
}

.page-about .tl-item:hover::before,
.page-about .tl-item:focus-within::before {
  background: var(--c-cyan);
  box-shadow: 0 0 0 4px rgba(46, 242, 214, 0.16);
}

.page-about .tl-year {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--c-gold);
}

.page-about .tl-title {
  font-family: var(--font-title);
  font-size: clamp(17px, 1.6vw, 21px);
  font-weight: 800;
  color: #FFFFFF;
  margin: 0 0 8px;
  letter-spacing: -0.005em;
}

.page-about .tl-note {
  margin: 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--about-text);
  max-width: 66ch;
}

/* ---------- Team ---------- */

.page-about .team-media {
  margin: 0 0 clamp(22px, 3vw, 34px);
}

.page-about .team-media img {
  aspect-ratio: 3 / 2;
}

.page-about .team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--about-hair);
  border: 1px solid var(--about-hair);
}

.page-about .team-card {
  background: var(--about-card);
  padding: clamp(18px, 2.4vw, 28px);
}

.page-about .team-card::before {
  content: "";
  display: block;
  width: 26px;
  height: 1px;
  background: var(--c-violet);
  margin-bottom: 14px;
}

.page-about .team-title {
  font-family: var(--font-title);
  font-size: 17px;
  font-weight: 800;
  color: #FFFFFF;
  margin: 0 0 10px;
}

.page-about .team-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--about-text);
}

/* ---------- Ecosystem ---------- */

.page-about .eco {
  margin-top: clamp(24px, 3.4vw, 40px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--about-hair);
  border: 1px solid var(--about-hair);
}

.page-about .eco-hub {
  background: linear-gradient(140deg, rgba(123, 92, 255, 0.28), rgba(7, 11, 30, 0.9));
  padding: clamp(22px, 3vw, 34px);
  display: flex;
  flex-direction: column;
  gap: 12px;
  justify-content: center;
}

.page-about .eco-num {
  font-family: var(--font-mono);
  font-size: clamp(30px, 4vw, 44px);
  line-height: 1;
  color: var(--c-cyan);
  letter-spacing: -0.02em;
}

.page-about .eco-hub-text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--about-text);
  max-width: 34ch;
}

.page-about .eco-map {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--about-hair);
}

.page-about .eco-node {
  background: var(--about-card);
  padding: clamp(18px, 2.4vw, 26px);
  border-left: 1px solid transparent;
  transition: background-color 0.25s ease, border-color 0.25s ease;
}

.page-about .eco-node:hover {
  background: #0D1533;
  border-left-color: var(--c-cyan);
}

.page-about .eco-node h3 {
  font-family: var(--font-title);
  font-size: 16px;
  font-weight: 800;
  color: #FFFFFF;
  margin: 0 0 8px;
}

.page-about .eco-node p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--about-dim);
}

.page-about .honor-strip {
  margin-top: clamp(24px, 3.2vw, 38px);
  border: 1px solid var(--about-hair);
  border-left: 3px solid var(--c-gold);
  background: var(--about-card);
  padding: clamp(20px, 2.6vw, 30px);
  display: flex;
  gap: clamp(16px, 2.4vw, 28px);
  align-items: flex-start;
  flex-direction: column;
}

.page-about .honor-num {
  font-family: var(--font-mono);
  font-size: clamp(32px, 4.2vw, 46px);
  line-height: 1;
  color: var(--c-gold);
  letter-spacing: -0.02em;
  flex: 0 0 auto;
}

.page-about .honor-strip p {
  margin: 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--about-text);
  max-width: 64ch;
}

/* ---------- Reach ---------- */

.page-about .reach-grid {
  list-style: none;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1px;
  background: var(--about-hair);
  border: 1px solid var(--about-hair);
}

.page-about .reach-card {
  background: var(--about-card);
  padding: clamp(18px, 2.2vw, 26px);
}

.page-about .reach-name {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--c-cyan);
  padding-bottom: 12px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--about-hair);
}

.page-about .reach-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.82;
  color: var(--about-text);
}

.page-about .reach-grid + .about-section-body {
  margin-top: clamp(20px, 2.6vw, 30px);
}

/* ---------- CTA ---------- */

.page-about .about-cta {
  border-top: 1px solid var(--about-hair);
  padding-top: clamp(30px, 4vw, 52px);
}

.page-about .about-cta h2 {
  font-family: var(--font-title);
  font-size: clamp(22px, 3vw, 34px);
  line-height: 1.25;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: #FFFFFF;
  margin: 12px 0 0;
  max-width: 24ch;
}

.page-about .cta-text {
  margin: clamp(14px, 1.8vw, 20px) 0 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--about-text);
  max-width: 62ch;
}

.page-about .cta-links {
  margin-top: clamp(22px, 3vw, 34px);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- Responsive ---------- */

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

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

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

  .page-about .honor-strip {
    flex-direction: row;
    align-items: center;
  }
}

@media (min-width: 768px) {
  .page-about .tl-item {
    grid-template-columns: 108px minmax(0, 1fr);
    column-gap: 22px;
    padding-left: 30px;
  }

  .page-about .tl-year {
    text-align: right;
    padding-top: 3px;
  }

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

@media (min-width: 1024px) {
  .page-about .about-body {
    grid-template-columns: 214px minmax(0, 1fr);
    gap: clamp(40px, 5vw, 76px);
  }

  .page-about .about-toc {
    top: calc(var(--header-h) + 38px);
    background: transparent;
    border-bottom: 0;
    border-left: 1px solid var(--about-hair);
    padding: 2px 0 2px 20px;
  }

  .page-about .about-toc-title {
    display: block;
    margin: 0 0 16px;
    font-family: var(--font-mono);
    font-size: 11.5px;
    letter-spacing: 0.18em;
    color: var(--about-dim);
  }

  .page-about .toc-list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
  }

  .page-about .toc-link {
    border: 0;
    padding: 7px 0;
    font-size: 13px;
    white-space: normal;
    line-height: 1.55;
    background: transparent;
  }

  .page-about .toc-link.is-active {
    color: var(--c-cyan);
    background: transparent;
    border-color: transparent;
  }

  .page-about .eco {
    grid-template-columns: 0.9fr 1.6fr;
  }

  .page-about .team-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}
</main>