.page-about {
  --about-line: rgba(214, 169, 74, 0.28);
  --about-grid: rgba(42, 37, 54, 0.6);
  overflow-x: hidden;
}

.page-about section {
  position: relative;
  padding-block: clamp(3.2rem, 8vw, 6.5rem);
}

.page-about .section-head {
  margin-bottom: clamp(1.8rem, 4vw, 3rem);
}

.page-about .section-head__title {
  font-size: clamp(1.55rem, 4vw, 2.5rem);
  line-height: 1.25;
  overflow-wrap: break-word;
}

/* ============ 首屏 ============ */
.page-about .about-hero {
  padding-block: clamp(1.6rem, 4vw, 2.6rem) clamp(3rem, 8vw, 6rem);
  background:
    radial-gradient(900px 420px at 84% 6%, rgba(107, 63, 212, 0.3), transparent 62%),
    radial-gradient(680px 380px at 4% 98%, rgba(43, 227, 214, 0.1), transparent 60%),
    var(--ink);
  border-bottom: 1px solid var(--steel);
}

.page-about .about-hero .breadcrumb {
  margin-bottom: clamp(1.6rem, 4vw, 2.6rem);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(2rem, 5vw, 3.5rem);
  align-items: center;
}

.page-about .about-kicker {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin: 0 0 1.15rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .about-kicker__num {
  display: inline-grid;
  place-items: center;
  min-width: 2.1rem;
  height: 1.5rem;
  padding-inline: 0.35rem;
  border: 1px solid var(--gold);
  color: var(--gold-bright);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
}

.page-about .about-h1 {
  margin: 0 0 1.35rem;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(2rem, 6.4vw, 3.85rem);
  line-height: 1.18;
  letter-spacing: 0.01em;
  color: #fff;
  overflow-wrap: break-word;
}

.page-about .about-h1 em {
  font-style: normal;
  background: linear-gradient(100deg, var(--gold-bright) 0%, var(--gold) 42%, #fff8e0 66%, var(--gold) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  background-size: 220% 100%;
  animation: about-sheen 9s ease-in-out infinite;
}

.page-about .about-lede {
  max-width: 46ch;
  margin: 0 0 2rem;
  font-size: clamp(0.98rem, 1.5vw, 1.1rem);
  line-height: 1.85;
  color: var(--text);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--steel);
  border: 1px solid var(--steel);
}

.page-about .about-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 0.95rem 0.9rem;
  background: var(--layer);
}

.page-about .about-fact__num {
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 3vw, 1.8rem);
  font-weight: 700;
  line-height: 1;
  color: var(--gold-bright);
}

.page-about .about-fact__label {
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--text-dim);
}

.page-about .about-hero__visual {
  position: relative;
  width: 100%;
  max-width: 380px;
  margin-inline: auto;
  aspect-ratio: 1 / 1;
  display: grid;
  place-items: center;
}

.page-about .about-hero__visual::before {
  content: "";
  position: absolute;
  inset: 6%;
  border: 1px solid rgba(43, 227, 214, 0.22);
  border-top-color: var(--neon);
  border-radius: 50%;
  animation: about-spin 22s linear infinite;
}

.page-about .about-hero__visual::after {
  content: "";
  position: absolute;
  inset: 16%;
  border: 1px dashed rgba(214, 169, 74, 0.32);
  border-radius: 50%;
  animation: about-spin 30s linear infinite reverse;
}

.page-about .crown-mark {
  position: relative;
  z-index: 1;
  width: 68%;
  height: auto;
  color: var(--gold);
  filter: drop-shadow(0 0 22px rgba(214, 169, 74, 0.35));
}

/* ============ 时间线 ============ */
.page-about .about-timeline {
  background: var(--layer-2);
  border-block: 1px solid var(--steel);
  overflow: hidden;
}

.page-about .about-timeline__bg {
  position: absolute;
  inset: 0;
  opacity: 0.14;
  pointer-events: none;
}

.page-about .about-timeline__bg img {
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

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

.page-about .tl {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .tl__item {
  --tl-year-w: 2.7rem;
  --tl-dot-w: 1.1rem;
  --tl-gap: 0.65rem;
  position: relative;
  display: grid;
  grid-template-columns: var(--tl-year-w) var(--tl-dot-w) minmax(0, 1fr);
  column-gap: var(--tl-gap);
  align-items: start;
  padding-bottom: clamp(1.6rem, 4vw, 2.4rem);
}

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

.page-about .tl__item::after {
  content: "";
  position: absolute;
  top: 1.7rem;
  bottom: 0;
  left: calc(var(--tl-year-w) + var(--tl-gap) + var(--tl-dot-w) / 2);
  width: 1px;
  background: linear-gradient(to bottom, rgba(214, 169, 74, 0.55), rgba(214, 169, 74, 0.05));
}

.page-about .tl__item:last-child::after {
  display: none;
}

.page-about .tl__year {
  padding-top: 0.32rem;
  font-family: var(--font-mono);
  font-size: clamp(0.95rem, 2.4vw, 1.25rem);
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--gold);
}

.page-about .tl__dot {
  justify-self: center;
  width: 0.85rem;
  height: 0.85rem;
  margin-top: 0.5rem;
  border: 2px solid var(--gold);
  border-radius: 50%;
  background: var(--layer-2);
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.page-about .tl__item:hover .tl__dot,
.page-about .tl__item:focus-within .tl__dot {
  border-color: var(--neon);
  box-shadow: 0 0 0 5px rgba(43, 227, 214, 0.16);
}

.page-about .tl__card {
  padding: 1.05rem 1.1rem 1.15rem;
  background: var(--layer);
  border: 1px solid var(--steel);
  border-left: 2px solid var(--gold);
  transition: transform 0.28s cubic-bezier(0.2, 0.7, 0.3, 1), border-color 0.28s ease, box-shadow 0.28s ease;
}

.page-about .tl__item:hover .tl__card,
.page-about .tl__item:focus-within .tl__card {
  transform: translate(5px, -5px);
  border-color: rgba(214, 169, 74, 0.6);
  box-shadow: var(--shadow-stack);
}

.page-about .tl__title {
  margin: 0 0 0.5rem;
  font-family: var(--font-serif);
  font-size: clamp(1.02rem, 2.2vw, 1.22rem);
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.01em;
}

.page-about .tl__lead {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.78;
  color: var(--text);
}

.page-about .tl__detail {
  margin-top: 0.75rem;
}

.page-about .tl__detail summary {
  padding-top: 0.7rem;
  border-top: 1px dashed rgba(214, 169, 74, 0.26);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--neon);
  cursor: pointer;
  list-style: none;
}

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

.page-about .tl__detail summary::before {
  content: "▸ ";
  color: var(--gold);
}

.page-about .tl__detail[open] summary::before {
  content: "▾ ";
}

.page-about .tl__detail p {
  margin: 0.7rem 0 0;
  font-size: 0.85rem;
  line-height: 1.76;
  color: var(--text-dim);
}

/* ============ 团队分工 ============ */
.page-about .about-team {
  background: var(--ink);
}

.page-about .about-team__grid {
  display: grid;
  gap: clamp(1.8rem, 4.5vw, 3.2rem);
  align-items: start;
}

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

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border: 1px solid var(--steel);
  filter: saturate(0.85) contrast(1.06);
}

.page-about .about-team__figure figcaption {
  margin-top: 0.8rem;
  padding-left: 0.65rem;
  border-left: 2px solid var(--royal);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--text-dim);
}

.page-about .team-row {
  position: relative;
  margin-bottom: 1rem;
  padding: 1.1rem 1.15rem 1.25rem;
  background: var(--layer);
  border: 1px solid var(--steel);
  transition: border-color 0.25s ease, background 0.25s ease;
}

.page-about .team-row:last-child {
  margin-bottom: 0;
}

.page-about .team-row:hover {
  border-color: rgba(214, 169, 74, 0.45);
  background: var(--layer-2);
}

.page-about .team-row__head {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}

.page-about .team-row__num {
  font-family: var(--font-mono);
  font-size: clamp(1.7rem, 4vw, 2.1rem);
  font-weight: 700;
  line-height: 1;
  color: var(--gold-bright);
}

.page-about .team-row h3 {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 1.04rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.02em;
}

.page-about .team-row > p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.78;
  color: var(--text);
}

.page-about .team-row__bar {
  height: 3px;
  margin: 0.85rem 0 0.6rem;
  background: rgba(42, 37, 54, 0.95);
  overflow: hidden;
}

.page-about .team-row__bar span {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--royal), var(--neon));
}

.page-about .team-row--edit .team-row__bar span {
  width: 32%;
}

.page-about .team-row--tech .team-row__bar span {
  width: 26%;
}

.page-about .team-row--care .team-row__bar span {
  width: 41%;
}

.page-about .team-row__meta {
  margin: 0;
  font-size: 0.76rem;
  letter-spacing: 0.03em;
  color: var(--text-dim);
}

/* ============ 分类结构 ============ */
.page-about .about-taxonomy {
  background: linear-gradient(180deg, var(--ink) 0%, var(--layer-2) 100%);
  border-block: 1px solid var(--steel);
}

.page-about .taxo-grid {
  display: grid;
  gap: 1px;
  background: var(--steel);
  border: 1px solid var(--steel);
}

.page-about .taxo-card {
  position: relative;
  padding: clamp(1.3rem, 3vw, 2rem);
  background: var(--layer);
  overflow: hidden;
}

.page-about .taxo-card--video {
  border-top: 3px solid var(--royal);
}

.page-about .taxo-card--arcade {
  border-top: 3px solid var(--neon);
}

.page-about .taxo-card__badge {
  position: absolute;
  top: 1.1rem;
  right: 1.1rem;
  padding: 0.26rem 0.6rem;
  border: 1px solid var(--steel);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.2em;
  color: var(--text-dim);
}

.page-about .taxo-card__num {
  display: block;
  margin-bottom: 0.4rem;
  font-family: var(--font-mono);
  font-size: clamp(3.1rem, 9vw, 5.2rem);
  font-weight: 700;
  line-height: 0.95;
  color: transparent;
  -webkit-text-stroke: 1.5px rgba(214, 169, 74, 0.62);
}

.page-about .taxo-card h3 {
  margin: 0 0 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  letter-spacing: 0.16em;
  color: var(--gold-bright);
}

.page-about .taxo-card p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--text);
}

.page-about .taxo-split {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
}

.page-about .taxo-split__item {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.05rem 1.15rem 1.2rem;
  border: 1px dashed rgba(214, 169, 74, 0.34);
  background: rgba(16, 14, 23, 0.55);
}

.page-about .taxo-split__item strong {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 4.5vw, 2rem);
  line-height: 1;
  color: var(--gold-bright);
}

.page-about .taxo-split__item p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.78;
  color: var(--text);
}

/* ============ 校对节奏 ============ */
.page-about .about-cadence {
  background: var(--layer-2);
}

.page-about .cadence-list {
  margin: 0;
  display: grid;
  border-top: 1px solid var(--steel);
}

.page-about .cadence-item {
  display: grid;
  gap: 0.55rem 1.6rem;
  padding: clamp(1.1rem, 3vw, 1.6rem) 0;
  border-bottom: 1px solid var(--steel);
}

.page-about .cadence-item dt {
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
  margin: 0;
  font-family: var(--font-mono);
  color: var(--gold-bright);
}

.page-about .cadence-num {
  font-size: clamp(2.1rem, 6.2vw, 3.15rem);
  font-weight: 700;
  line-height: 1;
}

.page-about .cadence-unit {
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  color: var(--text-dim);
}

.page-about .cadence-item dd {
  margin: 0;
  max-width: 58ch;
  font-size: 0.94rem;
  line-height: 1.82;
  color: var(--text);
}

/* ============ 覆盖范围 ============ */
.page-about .about-reach {
  background: var(--ink);
}

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

.page-about .reach-item {
  padding: clamp(1.2rem, 3vw, 1.85rem);
  background: var(--layer);
}

.page-about .reach-num {
  display: block;
  margin-bottom: 0.45rem;
  font-family: var(--font-mono);
  font-size: clamp(2.3rem, 7vw, 3.3rem);
  font-weight: 700;
  line-height: 1;
  color: var(--gold);
}

.page-about .reach-item:nth-child(2) .reach-num {
  color: var(--gold-bright);
}

.page-about .reach-item:nth-child(3) .reach-num {
  color: var(--neon);
}

.page-about .reach-item p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.78;
  color: var(--text);
}

.page-about .reach-note {
  margin: 1.4rem 0 0;
  padding-left: 0.85rem;
  border-left: 2px solid var(--royal);
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--text-dim);
}

/* ============ 合作与荣誉 ============ */
.page-about .about-partners {
  background: linear-gradient(160deg, var(--royal-deep) 0%, var(--layer-2) 46%, var(--ink) 100%);
  border-top: 1px solid var(--steel);
}

.page-about .about-partners__grid {
  display: grid;
  gap: clamp(1.8rem, 4.5vw, 3.2rem);
  align-items: center;
}

.page-about .about-partners__lede {
  margin: 0 0 1.5rem;
  max-width: 52ch;
  font-size: 0.96rem;
  line-height: 1.85;
  color: var(--text);
}

.page-about .honor-list {
  display: grid;
  gap: 0.95rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .honor-list li {
  display: grid;
  grid-template-columns: 3.2rem minmax(0, 1fr);
  gap: 0.9rem;
  align-items: start;
  padding-bottom: 0.95rem;
  border-bottom: 1px dashed rgba(214, 169, 74, 0.24);
}

.page-about .honor-list li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .honor-list__num {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--gold-bright);
}

.page-about .honor-list p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.78;
  color: var(--text);
}

.page-about .about-partners__figure {
  margin: 0;
}

.page-about .about-partners__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border: 1px solid rgba(214, 169, 74, 0.42);
  box-shadow: var(--shadow-stack);
}

.page-about .about-partners__figure figcaption {
  margin-top: 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--text-dim);
}

/* ============ 下一步 ============ */
.page-about .about-next {
  background: var(--ink);
  border-top: 1px solid var(--steel);
  padding-block: clamp(2.6rem, 6vw, 4.5rem);
}

.page-about .about-next__title {
  margin: 0 0 1.4rem;
  font-family: var(--font-serif);
  font-size: clamp(1.3rem, 3.4vw, 1.85rem);
  font-weight: 700;
  color: #fff;
}

.page-about .about-next__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.8rem;
}

.page-about .about-next__grid a {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 1.05rem 1.05rem 1.15rem;
  background: var(--layer);
  border: 1px solid var(--steel);
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.25s ease, transform 0.25s ease, background 0.25s ease;
}

.page-about .about-next__grid a:hover,
.page-about .about-next__grid a:focus-visible {
  border-color: var(--neon);
  background: var(--royal-deep);
  transform: translateY(-4px);
}

.page-about .about-next__num {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.page-about .about-next__grid a strong {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
}

.page-about .about-next__desc {
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--text-dim);
}

/* ============ 动画 ============ */
@keyframes about-spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes about-sheen {
  0%, 100% { background-position: 0% 0%; }
  50% { background-position: 100% 0%; }
}

/* ============ 响应式 ============ */
@media (min-width: 640px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

@media (min-width: 760px) {
  .page-about .tl__item {
    --tl-year-w: 4.4rem;
    --tl-dot-w: 1.4rem;
    --tl-gap: 1.1rem;
  }

  .page-about .tl__dot {
    width: 1rem;
    height: 1rem;
    margin-top: 0.6rem;
  }

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

  .page-about .taxo-split {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.6rem;
  }

  .page-about .taxo-split__item:nth-child(2) {
    margin-top: 1.8rem;
  }

  .page-about .cadence-item {
    grid-template-columns: minmax(0, 0.4fr) minmax(0, 1fr);
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: clamp(2.5rem, 5vw, 4.5rem);
  }

  .page-about .about-hero__visual {
    max-width: 440px;
    margin-inline: 0 auto;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 0.88fr) minmax(0, 1.12fr);
  }

  .page-about .about-team__figure {
    margin-top: 2.4rem;
  }

  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.62fr);
  }
}

@media (min-width: 1024px) {
  .page-about .about-next__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-hero__visual::before,
  .page-about .about-hero__visual::after,
  .page-about .about-h1 em {
    animation: none;
  }

  .page-about .tl__card,
  .page-about .team-row,
  .page-about .about-next__grid a {
    transition: none;
  }

  .page-about .tl__item:hover .tl__card,
  .page-about .tl__item:focus-within .tl__card {
    transform: none;
  }
}