.page-about {
  --about-body: #C4CFE2;
  --about-ink-soft: rgba(36, 23, 19, .76);
  --about-ink-accent: #9A4318;
  --about-title: #F3E7D3;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs {
  margin-top: 26px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 34px 0 72px;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -30% 35% 30% -15%;
  background:
    radial-gradient(58% 58% at 32% 12%, rgba(176, 38, 255, .22), transparent 70%),
    radial-gradient(48% 48% at 72% 2%, rgba(61, 255, 158, .10), transparent 72%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
    align-items: end;
  }
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
  font-size: clamp(32px, 6.2vw, 60px);
  line-height: 1.06;
  letter-spacing: -.012em;
  color: var(--cream);
}

.page-about .about-hero__lead {
  margin: 20px 0 0;
  max-width: 40em;
  font-size: 17px;
  line-height: 1.85;
  color: var(--about-body);
}

.page-about .about-hero__list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
  max-width: 42em;
}

.page-about .about-hero__list li {
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr);
  gap: 12px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--about-body);
}

.page-about .about-hero__list li::before {
  content: "";
  width: 20px;
  height: 2px;
  margin-top: .8em;
  background: var(--orange);
}

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

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  clip-path: polygon(0 8%, 100% 0, 100% 100%, 0 92%);
  filter: brightness(.82) contrast(1.06) saturate(.9);
}

.page-about .about-hero__figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(200deg, rgba(176, 38, 255, .16), rgba(7, 12, 22, .62) 62%);
  clip-path: polygon(0 8%, 100% 0, 100% 100%, 0 92%);
  pointer-events: none;
}

/* ---------- 主体画布：长文 + 粘性索引 ---------- */
.page-about .about-canvas {
  display: grid;
  grid-template-columns: 1fr;
  gap: 44px;
  padding-bottom: 84px;
}

.page-about .about-canvas__main,
.page-about .about-canvas__side {
  min-width: 0;
}

@media (min-width: 1024px) {
  .page-about .about-canvas {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-canvas__side {
    position: sticky;
    top: 104px;
  }
}

.page-about .about-block {
  margin-bottom: 60px;
}

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

.page-about .about-block h2 {
  margin: 10px 0 18px;
  font-size: clamp(24px, 3.3vw, 36px);
  line-height: 1.16;
  letter-spacing: -.008em;
  color: var(--cream);
}

.page-about .about-block > p {
  max-width: 40em;
  margin: 0 0 16px;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--about-body);
}

.page-about .about-statement {
  position: relative;
  margin: 0 0 20px;
  padding: 2px 0 2px 20px;
  border-left: 3px solid var(--neon);
  max-width: 38em;
  font-size: 18px;
  line-height: 1.8;
  color: var(--title, var(--cream));
}

/* 联赛构成 */
.page-about .about-leagues {
  list-style: none;
  margin: 0 0 26px;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

@media (min-width: 620px) {
  .page-about .about-leagues {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }
}

.page-about .about-leagues__item {
  padding-top: 14px;
  border-top: 2px solid var(--line);
}

.page-about .about-leagues__num {
  margin: 0;
  font-family: var(--mono);
  font-size: 42px;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--neon);
}

.page-about .about-leagues__name {
  margin: 10px 0 6px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .05em;
  color: var(--cream);
}

.page-about .about-leagues__desc {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* 四类内容线 */
.page-about .about-forms {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-forms li {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 16px;
  align-items: baseline;
  padding: 14px 0;
  border-top: 1px solid var(--line-soft);
  font-size: 15px;
  line-height: 1.75;
  color: var(--about-body);
}

.page-about .about-forms li:last-child {
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-forms__tag {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--gold);
}

/* 生产流程 */
.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-flow__step {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 16px;
  padding: 22px 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-flow__step:last-child {
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-flow__no {
  font-family: var(--mono);
  font-size: 22px;
  line-height: 1.2;
  letter-spacing: .04em;
  color: var(--gold);
}

.page-about .about-flow__name {
  margin: 0 0 8px;
  font-size: 17px;
  letter-spacing: .04em;
  color: var(--cream);
}

.page-about .about-flow__desc {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.82;
  color: var(--about-body);
}

/* 团队分工 */
.page-about .about-team {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
}

.page-about .about-team__row {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 4px 18px;
  padding: 20px 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-team__row:last-child {
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-team__no {
  grid-row: 1 / span 2;
  padding-top: 4px;
  font-family: var(--mono);
  font-size: 14px;
  letter-spacing: .1em;
  color: var(--orange);
}

.page-about .about-team__role {
  margin: 0;
  font-size: 17px;
  letter-spacing: .03em;
  color: var(--cream);
}

.page-about .about-team__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-body);
}

/* 粘性索引卡片 */
.page-about .about-canvas__side {
  display: grid;
  align-content: start;
}

.page-about .about-key {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 66px;
  grid-template-rows: auto auto;
  align-items: center;
  gap: 4px 14px;
  padding: 16px 0 16px 18px;
  border-left: 2px solid var(--line);
  transition: border-color .35s ease, background-color .35s ease;
  opacity: 0;
  transform: translateY(10px);
  animation: about-key-in .6s cubic-bezier(.22, .61, .36, 1) forwards;
}

.page-about .about-key:nth-child(1) { animation-delay: .04s; }
.page-about .about-key:nth-child(2) { animation-delay: .12s; }
.page-about .about-key:nth-child(3) { animation-delay: .20s; }
.page-about .about-key:nth-child(4) { animation-delay: .28s; }
.page-about .about-key:nth-child(5) { animation-delay: .36s; }

.page-about .about-key:hover {
  border-left-color: var(--neon);
  background: linear-gradient(90deg, rgba(61, 255, 158, .08), transparent 72%);
}

.page-about .about-key__no {
  grid-column: 1;
  grid-row: 1;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--muted);
}

.page-about .about-key__label {
  grid-column: 1;
  grid-row: 2;
  font-size: 14px;
  line-height: 1.5;
  color: var(--about-body);
}

.page-about .about-key__num {
  grid-column: 2;
  grid-row: 1 / span 2;
  justify-self: end;
  font-family: var(--mono);
  font-size: 40px;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--neon);
}

@keyframes about-key-in {
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 发展轨迹 ---------- */
.page-about .about-track-section {
  position: relative;
  padding: 72px 0 80px;
  overflow: hidden;
}

.page-about .about-track__title {
  margin: 10px 0 0;
  max-width: 22em;
  font-size: clamp(24px, 3.3vw, 38px);
  line-height: 1.16;
  letter-spacing: -.008em;
  color: var(--cream);
}

.page-about .about-track-wrap {
  position: relative;
  margin-top: 38px;
  padding: 46px 0;
}

.page-about .about-track__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .18;
  filter: saturate(.6);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-track-wrap::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, var(--bg) 0%, rgba(7, 12, 22, .45) 26%, rgba(7, 12, 22, .45) 74%, var(--bg) 100%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-track {
  position: relative;
  z-index: 1;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

@media (min-width: 900px) {
  .page-about .about-track {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 26px;
  }
}

.page-about .about-track__item {
  position: relative;
  padding-top: 20px;
  border-top: 2px solid var(--line);
}

.page-about .about-track__item::before {
  content: "";
  position: absolute;
  top: -2px;
  left: 0;
  width: 42px;
  height: 2px;
  background: var(--neon);
  transition: width .38s ease;
}

.page-about .about-track__item:hover::before,
.page-about .about-track__item:focus-within::before {
  width: 100%;
}

.page-about .about-track__no {
  display: block;
  font-family: var(--mono);
  font-size: 30px;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--neon);
}

.page-about .about-track__name {
  margin: 12px 0 8px;
  font-size: 17px;
  letter-spacing: .05em;
  color: var(--cream);
}

.page-about .about-track__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--about-body);
}

.page-about .about-track__item::after {
  content: attr(data-kw);
  display: block;
  margin-top: 12px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--gold);
  opacity: 0;
  transform: translateY(4px);
  transition: opacity .28s ease, transform .28s ease;
}

.page-about .about-track__item:hover::after,
.page-about .about-track__item:focus-within::after {
  opacity: 1;
  transform: none;
}

@media (hover: none) {
  .page-about .about-track__item::after {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 合作与认可 ---------- */
.page-about .about-partners {
  padding: 8px 0 76px;
}

.page-about .about-partners h2 {
  margin: 10px 0 0;
  max-width: 20em;
  font-size: clamp(24px, 3.3vw, 36px);
  line-height: 1.16;
  letter-spacing: -.008em;
  color: var(--cream);
}

.page-about .about-partners__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-top: 30px;
}

@media (min-width: 760px) {
  .page-about .about-partners__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }
}

.page-about .about-partners__item {
  padding: 24px 22px;
  border-radius: var(--radius);
  background:
    linear-gradient(158deg, rgba(176, 38, 255, .18) 0%, rgba(255, 45, 120, .08) 52%, rgba(16, 26, 46, .5) 100%);
}

.page-about .about-partners__tag {
  margin: 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--gold);
}

.page-about .about-partners__name {
  margin: 12px 0 10px;
  font-size: 18px;
  letter-spacing: .04em;
  color: var(--cream);
}

.page-about .about-partners__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--about-body);
}

.page-about .about-partners__note {
  margin: 26px 0 0;
  max-width: 46em;
  padding-left: 18px;
  border-left: 2px solid var(--line);
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 内容边界（奶油纸面） ---------- */
.page-about .section--cream {
  padding: 64px 0;
}

.page-about .about-bound__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}

@media (min-width: 900px) {
  .page-about .about-bound__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 56px;
    align-items: start;
  }
}

.page-about .section--cream .eyebrow {
  color: rgba(36, 23, 19, .58);
}

.page-about .about-bound h2 {
  margin: 10px 0 14px;
  font-size: clamp(24px, 3.2vw, 34px);
  line-height: 1.18;
  letter-spacing: -.008em;
  color: var(--ink);
}

.page-about .about-bound__lead {
  margin: 0;
  max-width: 26em;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--about-ink-soft);
}

.page-about .about-bound__list {
  list-style: none;
  counter-reset: about-bound;
  margin: 0;
  padding: 0;
}

.page-about .about-bound__list li {
  counter-increment: about-bound;
  position: relative;
  padding-left: 40px;
  margin-bottom: 18px;
  font-size: 16px;
  line-height: 1.82;
  color: var(--ink);
}

.page-about .about-bound__list li::before {
  content: counter(about-bound, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 3px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--about-ink-accent);
}

.page-about .about-bound__more {
  margin-top: 22px;
  border-top: 1px solid rgba(36, 23, 19, .18);
  padding-top: 8px;
}

.page-about .about-bound__more summary {
  padding: 10px 0;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--about-ink-accent);
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-bound__more summary::before {
  content: "＋";
  margin-right: 8px;
}

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

.page-about .about-bound__more p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--about-ink-soft);
}

.page-about .about-bound__link {
  margin: 24px 0 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ink);
}

.page-about .about-bound__link a {
  color: var(--about-ink-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 收尾 ---------- */
.page-about .about-closing {
  padding: 0 0 8px;
}

.page-about .about-closing__frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
}

.page-about .about-closing__frame img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 6;
  object-fit: cover;
  opacity: .58;
}

@media (max-width: 767px) {
  .page-about .about-closing__frame img {
    aspect-ratio: 4 / 3;
  }
}

.page-about .about-closing__inner {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 28px 24px 26px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  background: linear-gradient(0deg, rgba(7, 12, 22, .92), rgba(7, 12, 22, 0));
}

.page-about .about-closing__text {
  margin: 0;
  max-width: 20em;
  font-size: clamp(20px, 3vw, 30px);
  line-height: 1.2;
  letter-spacing: -.006em;
  color: var(--cream);
}

.page-about .about-closing__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

@media (min-width: 768px) {
  .page-about .about-closing__inner {
    padding: 40px 44px 38px;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-key {
    animation: none;
    opacity: 1;
    transform: none;
  }

  .page-about .about-track__item::before,
  .page-about .about-track__item::after,
  .page-about .about-key {
    transition: none;
  }
}

.page-about {
  --title: currentColor;
}