/* ============ 品牌历程页 · 赛场边线档案 ============ */
.page-about {
  --about-rail: 66px;
  --about-line-x: 8px;
  position: relative;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(22px, 3.6vw, 44px) 0 clamp(30px, 4.4vw, 54px);
}

.page-about .about-hero .eyebrow {
  color: var(--neon);
  letter-spacing: .16em;
  margin-bottom: 16px;
}

.page-about .about-hero h1 {
  margin: 0 0 20px;
  max-width: 20ch;
  line-height: 1.14;
}

.page-about .about-hero__lede {
  max-width: 60ch;
  margin: 0 0 clamp(24px, 3.4vw, 38px);
  color: var(--paper);
  opacity: .84;
}

/* 斜切数据带 */
.page-about .about-stats {
  list-style: none;
  margin: 0;
  padding: clamp(20px, 2.6vw, 28px) clamp(18px, 2.6vw, 30px);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(16px, 2.4vw, 28px);
  background: linear-gradient(112deg, var(--panel) 0%, var(--card) 62%, var(--panel) 100%);
  border-radius: var(--radius-xl) var(--radius-lg) var(--radius-xl) var(--radius-md);
  clip-path: polygon(0 0, 100% 4%, 100% 100%, 0 96%);
}

.page-about .about-stats__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-about .about-stats__num {
  font-size: clamp(26px, 4.4vw, 40px);
  font-weight: 700;
  line-height: 1;
  color: var(--neon);
  letter-spacing: -.02em;
}

.page-about .about-stats__num small {
  font-size: .55em;
  color: var(--cyan);
  margin-left: 2px;
}

.page-about .about-stats__cap {
  font-size: 13px;
  color: var(--mist);
  line-height: 1.5;
}

/* ---------- 章节通用 ---------- */
.page-about .about-block {
  padding: clamp(34px, 5vw, 64px) 0;
}

.page-about .about-block__head {
  max-width: 66ch;
  margin-bottom: clamp(24px, 3.4vw, 40px);
}

.page-about .about-block__head .eyebrow {
  color: var(--cyan);
  margin-bottom: 12px;
}

.page-about .about-block__head h2 {
  margin: 0 0 16px;
}

.page-about .about-block__head .lede {
  margin: 0;
  opacity: .82;
}

.page-about .about-cta-line {
  margin: clamp(22px, 3vw, 34px) 0 0;
  font-size: 16px;
  color: var(--mist);
}

.page-about .about-link {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(184, 255, 60, .45);
  padding-bottom: 2px;
  transition: var(--ease);
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--paper);
}

/* ---------- 时间轴 ---------- */
.page-about .tl-wrap {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  padding: clamp(22px, 3.4vw, 42px) clamp(16px, 2.8vw, 36px);
  background: linear-gradient(168deg, var(--panel) 0%, rgba(10, 23, 38, .92) 100%);
}

.page-about .tl-wrap__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .14;
  pointer-events: none;
}

.page-about .tl {
  list-style: none;
  margin: 0;
  padding: 0 0 0 22px;
  position: relative;
  display: grid;
  gap: 6px;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: var(--about-line-x);
  top: 14px;
  bottom: 14px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--neon) 0%, var(--violet) 52%, var(--cyan) 100%);
  opacity: .6;
}

.page-about .tl__item {
  position: relative;
  display: grid;
  grid-template-columns: var(--about-rail) minmax(0, 1fr);
  gap: 16px;
  padding: 4px 0 20px;
  border-radius: var(--radius-lg);
  transition: var(--ease);
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: -20px;
  top: 24px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--neon);
  box-shadow: 0 0 0 4px rgba(184, 255, 60, .16);
  transition: var(--ease);
}

.page-about .tl__item:nth-child(even)::before {
  background: var(--violet);
  box-shadow: 0 0 0 4px rgba(110, 91, 255, .2);
}

.page-about .tl__item:hover::before,
.page-about .tl__item:focus-visible::before {
  transform: scale(1.28);
  box-shadow: 0 0 0 7px rgba(184, 255, 60, .22);
}

.page-about .tl__item:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 6px;
}

.page-about .tl__label {
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--neon);
  text-align: right;
  padding-top: 22px;
  line-height: 1.4;
}

.page-about .tl__item:nth-child(even) .tl__label {
  color: var(--cyan);
}

.page-about .tl__panel {
  padding: clamp(16px, 2.2vw, 24px) clamp(16px, 2.4vw, 26px);
  transition: var(--ease);
}

.page-about .tl__item:hover .tl__panel,
.page-about .tl__item:focus-visible .tl__panel {
  border-color: var(--neon);
  transform: translateY(-4px);
}

.page-about .tl__panel h3 {
  margin: 0 0 10px;
}

.page-about .tl__panel p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.76;
  color: var(--paper);
  opacity: .78;
}

/* ---------- 制作流程链 ---------- */
.page-about .chain {
  display: grid;
  gap: clamp(18px, 2.6vw, 28px);
}

.page-about .chain__rails {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .chain__node {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 11px 20px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--mist);
  font-family: var(--font-body);
  font-size: 15px;
  cursor: pointer;
  transition: var(--ease);
}

.page-about .chain__node:hover {
  border-color: var(--neon);
  color: var(--paper);
}

.page-about .chain__node[aria-selected="true"] {
  background: var(--neon);
  border-color: var(--neon);
  color: var(--ink);
}

.page-about .chain__node:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 3px;
}

.page-about .chain__idx {
  font-size: 12px;
  letter-spacing: .06em;
  opacity: .75;
}

.page-about .chain__name {
  font-weight: 600;
  letter-spacing: .02em;
}

.page-about .chain__panel {
  padding: clamp(20px, 2.8vw, 30px);
  border-left: 3px solid var(--neon);
}

.page-about .chain__panel .eyebrow {
  color: var(--cyan);
  margin-bottom: 10px;
}

.page-about .chain__panel h3 {
  margin: 0 0 12px;
}

.page-about .chain__panel p {
  margin: 0 0 12px;
  font-size: 15.5px;
  line-height: 1.76;
  color: var(--paper);
  opacity: .8;
  max-width: 62ch;
}

.page-about .chain__time {
  margin: 0;
  font-size: 13px;
  color: var(--ember);
  letter-spacing: .04em;
}

.page-about [data-panel][hidden] {
  display: none;
}

/* ---------- 团队 ---------- */
.page-about .crew {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
}

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

.page-about .crew__panel {
  padding: clamp(20px, 2.8vw, 30px);
  display: grid;
  gap: 20px;
}

.page-about .crew__ring-wrap {
  display: flex;
  justify-content: center;
}

.page-about .crew__ring {
  position: relative;
  width: clamp(150px, 34vw, 190px);
  aspect-ratio: 1;
  border-radius: 50%;
  background: conic-gradient(var(--neon) 0turn .44turn, var(--cyan) .44turn .68turn, var(--violet) .68turn 1turn);
  -webkit-mask: radial-gradient(circle, transparent 57%, #000 58%);
  mask: radial-gradient(circle, transparent 57%, #000 58%);
  transition: var(--ease);
}

.page-about .crew__ring:hover {
  transform: scale(1.04);
}

.page-about .crew__ring-hole {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: clamp(28px, 5vw, 36px);
  font-weight: 700;
  color: var(--paper);
  -webkit-mask: none;
  mask: none;
}

.page-about .crew__ring-hole small {
  font-size: .42em;
  color: var(--mist);
  margin-left: 3px;
  align-self: flex-end;
  padding-bottom: 6px;
}

.page-about .crew__legend {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .crew__legend-item {
  display: grid;
  grid-template-columns: 12px minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-md);
  background: rgba(143, 163, 184, .07);
  transition: var(--ease);
}

.page-about .crew__legend-item:hover {
  background: rgba(184, 255, 60, .1);
}

.page-about .crew__swatch {
  width: 12px;
  height: 12px;
  border-radius: 3px;
}

.page-about .crew__swatch--neon { background: var(--neon); }
.page-about .crew__swatch--cyan { background: var(--cyan); }

.page-about .crew__legend-name {
  font-size: 14.5px;
  color: var(--paper);
  opacity: .86;
  min-width: 0;
}

.page-about .crew__legend-num {
  font-size: 17px;
  font-weight: 700;
  color: var(--neon);
}

.page-about .crew__legend-pct {
  font-size: 12.5px;
  color: var(--mist);
}

.page-about .crew__note {
  margin: 0;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
}

/* ---------- 赛事门类 ---------- */
.page-about .cats {
  list-style: none;
  margin: 0 0 clamp(20px, 3vw, 30px);
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.page-about .cats__item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 16px;
  border-radius: var(--radius-md);
  background: var(--panel);
  border-left: 3px solid transparent;
  transition: var(--ease);
}

.page-about .cats__item:hover {
  border-left-color: var(--neon);
  transform: translateX(3px);
}

.page-about .cats__idx {
  font-size: 12px;
  color: var(--mist);
  letter-spacing: .06em;
}

.page-about .cats__name {
  font-size: 16px;
  font-weight: 600;
  color: var(--paper);
}

.page-about .tier {
  display: grid;
  gap: 14px;
}

.page-about .tier__card {
  padding: clamp(18px, 2.4vw, 26px);
}

.page-about .tier__card .tag {
  display: inline-block;
  margin-bottom: 12px;
}

.page-about .tier__card h3 {
  margin: 0 0 10px;
}

.page-about .tier__card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.74;
  color: var(--paper);
  opacity: .76;
}

/* ---------- 专题系列 ---------- */
.page-about .series {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .series__item {
  position: relative;
  padding: clamp(18px, 2.4vw, 24px) clamp(18px, 2.6vw, 28px);
  background: linear-gradient(100deg, var(--panel) 0%, rgba(18, 42, 66, .55) 100%);
  border-radius: var(--radius-lg) var(--radius-md) var(--radius-lg) var(--radius-md);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 14px) 100%, 0 100%);
  transition: var(--ease);
}

.page-about .series__item:hover {
  background: linear-gradient(100deg, var(--card) 0%, rgba(24, 49, 74, .8) 100%);
  transform: translateY(-3px);
}

.page-about .series__idx {
  display: block;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--violet);
  margin-bottom: 8px;
}

.page-about .series__item:nth-child(3n + 1) .series__idx { color: var(--neon); }
.page-about .series__item:nth-child(3n + 2) .series__idx { color: var(--cyan); }

.page-about .series__name {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-about .series__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--mist);
}

/* ---------- 合作生态 ---------- */
.page-about .partners {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
}

.page-about .partners__body {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-about .partners__stat {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 18px;
  padding: clamp(18px, 2.4vw, 24px);
  background: var(--panel);
  border-left: 4px solid var(--neon);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
}

.page-about .partners__stat--ember {
  border-left-color: var(--ember);
}

.page-about .partners__stat-num {
  font-size: clamp(34px, 6vw, 50px);
  font-weight: 700;
  line-height: .92;
  color: var(--neon);
  letter-spacing: -.03em;
}

.page-about .partners__stat--ember .partners__stat-num {
  color: var(--ember);
}

.page-about .partners__stat h3 {
  margin: 0 0 8px;
}

.page-about .partners__stat p {
  margin: 0;
  font-size: 15px;
  line-height: 1.74;
  color: var(--paper);
  opacity: .76;
}

.page-about .partners__note {
  margin: 0;
  padding-left: 4px;
}

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

/* ---------- 下一步 ---------- */
.page-about .next {
  list-style: none;
  margin: 0 0 clamp(28px, 4vw, 48px);
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .next__item {
  display: grid;
  grid-template-columns: 16px minmax(0, 1fr);
  gap: 6px 16px;
  padding: clamp(16px, 2.2vw, 22px) clamp(16px, 2.4vw, 26px);
  border-radius: var(--radius-lg);
  background: rgba(18, 42, 66, .55);
  transition: var(--ease);
}

.page-about .next__item:hover {
  background: var(--panel);
}

.page-about .next__mark {
  grid-row: span 2;
  width: 10px;
  height: 10px;
  margin-top: 9px;
  border-radius: 2px;
  background: var(--cyan);
  box-shadow: 0 0 12px rgba(53, 224, 192, .55);
}

.page-about .next__item:nth-child(2) .next__mark { background: var(--violet); box-shadow: 0 0 12px rgba(110, 91, 255, .55); }
.page-about .next__item:nth-child(3) .next__mark { background: var(--amber); box-shadow: 0 0 12px rgba(255, 194, 75, .55); }

.page-about .next__item h3 {
  margin: 0;
}

.page-about .next__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.74;
  color: var(--paper);
  opacity: .76;
  max-width: 68ch;
}

/* ---------- 收尾行动块 ---------- */
.page-about .about-end {
  display: grid;
  gap: 22px;
  padding: clamp(24px, 3.4vw, 40px);
  background: linear-gradient(118deg, var(--card) 0%, var(--panel) 55%, rgba(110, 91, 255, .22) 100%);
  border-radius: var(--radius-xl);
  border: 1px solid var(--line-strong);
}

.page-about .about-end h2 {
  margin: 0 0 12px;
}

.page-about .about-end__copy p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.76;
  color: var(--paper);
  opacity: .82;
  max-width: 56ch;
}

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

.page-about .about-end__acts .btn {
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

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

  .page-about .about-end {
    grid-template-columns: minmax(0, 1.35fr) auto;
    align-items: center;
  }
}

@media (min-width: 1080px) {
  .page-about .about-hero h1 {
    max-width: 22ch;
  }

  .page-about .crew {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .crew__panel {
    padding: 34px;
  }

  .page-about .partners {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    align-items: start;
  }

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

  .page-about .chain__rails {
    flex-wrap: nowrap;
  }

  .page-about .chain__panel p {
    font-size: 16px;
  }
}

@media (max-width: 560px) {
  .page-about {
    --about-rail: 0px;
  }

  .page-about .tl {
    padding-left: 18px;
  }

  .page-about .tl__item {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
  }

  .page-about .tl__label {
    text-align: left;
    padding-top: 14px;
    font-size: 12px;
  }

  .page-about .tl__item::before {
    left: -21px;
    top: 18px;
    width: 10px;
    height: 10px;
  }

  .page-about .chain__node {
    padding: 9px 15px;
    font-size: 14px;
  }

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

  .page-about .partners__stat {
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
  }

  .page-about .about-stats {
    padding: 20px 18px;
  }

  .page-about .about-end__acts .btn {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl__item,
  .page-about .tl__panel,
  .page-about .series__item,
  .page-about .cats__item,
  .page-about .crew__ring,
  .page-about .chain__node {
    transition: none;
  }

  .page-about .tl__item:hover .tl__panel,
  .page-about .series__item:hover,
  .page-about .cats__item:hover,
  .page-about .crew__ring:hover {
    transform: none;
  }
}