/* ===== 品牌历程 · 页面专属样式（作用域 .page-about） ===== */
.page-about {
  --ch-rail: 104px;
  --ch-gap: clamp(16px, 3vw, 52px);
  --ch-pad: clamp(46px, 7vw, 96px);
  position: relative;
  overflow-x: clip;
  background-image:
    radial-gradient(900px 520px at 90% 2%, rgba(255, 107, 26, .10), transparent 68%),
    radial-gradient(760px 460px at 0% 58%, rgba(122, 92, 255, .08), transparent 70%);
  background-repeat: no-repeat;
}

.page-about__top {
  padding-top: clamp(18px, 3vw, 30px);
}

.page-about .crumb__sep {
  margin: 0 .55em;
  color: var(--line);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(28px, 5vw, 58px) 0 clamp(34px, 5.5vw, 68px);
}

.page-about .about-hero__inner {
  display: grid;
  gap: clamp(28px, 5vw, 54px);
}

@media (min-width: 960px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.6fr) minmax(250px, .78fr);
    align-items: end;
    gap: clamp(40px, 6vw, 88px);
  }
}

.page-about .about-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--whistle);
}

.page-about .about-hero__dot {
  width: 8px;
  height: 8px;
  background: var(--whistle);
  clip-path: polygon(0 0, 100% 0, 100% 66%, 66% 100%, 0 100%);
  animation: about-pulse 4.6s ease-in-out infinite;
}

@keyframes about-pulse {
  0%, 100% { opacity: .5; }
  50% { opacity: 1; }
}

.page-about .about-hero h1 {
  margin: 0;
  font-size: clamp(2rem, 6vw, 4rem);
  line-height: 1.06;
  font-weight: 900;
  letter-spacing: -.03em;
  color: var(--score);
  transform: rotate(-1.2deg);
  transform-origin: left center;
  text-wrap: balance;
}

.page-about .about-hero__dek {
  margin: clamp(18px, 3vw, 26px) 0 0;
  max-width: 48ch;
  font-size: clamp(1rem, 1.5vw, 1.1rem);
  line-height: 1.85;
  color: var(--muted);
}

.page-about .about-hero__side {
  display: grid;
  gap: 16px;
}

.page-about .hero-stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}

.page-about .hero-stats li {
  display: grid;
  gap: 4px;
  padding: 15px 16px;
  background: var(--stand);
}

.page-about .hero-stats b {
  font-family: var(--font-mono);
  font-size: clamp(1.3rem, 2.4vw, 1.6rem);
  font-weight: 800;
  letter-spacing: -.03em;
  color: var(--score);
}

.page-about .hero-stats span {
  font-size: .74rem;
  line-height: 1.5;
  color: var(--muted);
}

/* ---------- 章节索引条 ---------- */
.page-about .chapter-nav {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(16, 38, 28, .9), rgba(10, 27, 20, .35));
}

.page-about .chapter-nav__list {
  display: flex;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 12px 0;
  overflow-x: auto;
  scrollbar-width: thin;
  overscroll-behavior-x: contain;
  -webkit-overflow-scrolling: touch;
}

.page-about .chapter-nav__list li {
  flex: 0 0 auto;
}

.page-about .chapter-nav__list a {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 8px 16px;
  font-size: .84rem;
  white-space: nowrap;
  text-decoration: none;
  color: var(--muted);
  border: 1px solid var(--line);
  background: rgba(16, 38, 28, .55);
  clip-path: polygon(9px 0, 100% 0, 100% calc(100% - 9px), calc(100% - 9px) 100%, 0 100%, 0 9px);
  transition: color .18s ease, border-color .18s ease, background .18s ease;
}

.page-about .chapter-nav__list a:hover,
.page-about .chapter-nav__list a:focus-visible {
  color: var(--score);
  border-color: var(--whistle);
  background: rgba(255, 107, 26, .1);
}

.page-about .chapter-nav__num {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: .82rem;
  color: var(--whistle);
}

/* ---------- 章节长卷 ---------- */
.page-about .chapter {
  position: relative;
  padding: var(--ch-pad) 0;
  scroll-margin-top: calc(var(--top-h) + 26px);
}

.page-about .chapter + .chapter::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: repeating-linear-gradient(84deg, var(--line) 0 14px, transparent 14px 30px);
  opacity: .8;
}

.page-about .chapter__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(14px, 3vw, 30px);
}

@media (min-width: 900px) {
  .page-about .chapter__grid {
    grid-template-columns: var(--ch-rail) minmax(0, 1fr);
    gap: var(--ch-gap);
  }
}

.page-about .chapter__rail {
  display: flex;
  flex-direction: row;
  align-items: baseline;
  gap: 14px;
}

@media (min-width: 900px) {
  .page-about .chapter__rail {
    position: sticky;
    top: calc(var(--top-h) + 30px);
    align-self: start;
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
  }
}

.page-about .chapter__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(3rem, 11vw, 5.4rem);
  font-weight: 900;
  line-height: .82;
  letter-spacing: -.05em;
  color: transparent;
  -webkit-text-stroke: 1.6px var(--whistle);
  transition: color .3s ease, -webkit-text-stroke-color .3s ease;
}

.page-about .chapter:target .chapter__num {
  color: var(--whistle);
  -webkit-text-stroke-color: var(--whistle-soft);
}

@supports not ((-webkit-text-stroke: 1px black) or (text-stroke: 1px black)) {
  .page-about .chapter__num {
    color: var(--whistle);
  }
}

.page-about .chapter__year {
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .32em;
  text-transform: uppercase;
  white-space: nowrap;
  color: rgba(147, 169, 157, .62);
}

@media (max-width: 899px) {
  .page-about .chapter__year {
    writing-mode: horizontal-tb;
    letter-spacing: .22em;
  }
}

.page-about .chapter__body {
  max-width: 76ch;
}

.page-about .chapter__title {
  margin: 0 0 clamp(14px, 2.4vw, 22px);
  font-size: clamp(1.45rem, 3.3vw, 2.3rem);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -.022em;
  color: var(--score);
}

.page-about .chapter__body > p {
  margin: 0 0 1.05em;
  font-size: 1.02rem;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .chapter__body > p:last-of-type {
  margin-bottom: 0;
}

.page-about .chapter__next {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: clamp(20px, 3vw, 30px);
  padding: 9px 17px;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .14em;
  text-decoration: none;
  color: var(--muted);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  transition: color .18s ease, border-color .18s ease, background .18s ease;
}

.page-about .chapter__next:hover,
.page-about .chapter__next:focus-visible {
  color: var(--whistle);
  border-color: var(--whistle);
  background: rgba(255, 107, 26, .08);
}

/* ---------- 图片 ---------- */
.page-about .figure {
  margin: clamp(20px, 3vw, 32px) 0 0;
}

.page-about .figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  background: var(--stand);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}

.page-about .figure--tall img {
  aspect-ratio: 4 / 5;
}

.page-about .figure figcaption {
  margin-top: 10px;
  font-size: .8rem;
  line-height: 1.65;
  letter-spacing: .02em;
  color: rgba(147, 169, 157, .82);
}

/* ---------- 大区灯点图 ---------- */
.page-about .region-panel {
  margin-top: clamp(22px, 3.4vw, 34px);
  padding: clamp(16px, 2.6vw, 26px);
  border: 1px solid var(--line);
  background: linear-gradient(155deg, rgba(16, 38, 28, .92), rgba(10, 27, 20, .5));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-about .region-map {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .region-map .rm-link {
  stroke: var(--line);
  stroke-width: 1.2;
  stroke-dasharray: 5 7;
  fill: none;
}

.page-about .region-map .rm-link--soft {
  stroke: rgba(122, 92, 255, .38);
}

.page-about .region-map .rm-node {
  fill: var(--stand);
  stroke: var(--turf);
  stroke-width: 1.6;
}

.page-about .region-map .rm-halo {
  fill: none;
  stroke: rgba(44, 106, 75, .42);
  stroke-width: 1;
}

.page-about .region-map .rm-hub {
  fill: var(--whistle);
}

.page-about .region-map .rm-label {
  fill: var(--score);
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .04em;
}

.page-about .region-map .rm-code {
  fill: var(--neon);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
}

/* ---------- 城市索引条带 ---------- */
.page-about .city-strip {
  margin-top: clamp(22px, 3.4vw, 34px);
  padding: 18px 18px 22px;
  border: 1px solid var(--line);
  background:
    linear-gradient(100deg, rgba(122, 92, 255, .09), rgba(10, 27, 20, .2) 45%, rgba(255, 107, 26, .07));
  overflow-x: auto;
  overscroll-behavior-x: contain;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-about .city-strip__groups {
  display: flex;
  gap: clamp(20px, 3vw, 34px);
  list-style: none;
  margin: 0;
  padding: 0;
  min-width: max-content;
}

.page-about .city-group {
  display: grid;
  gap: 10px;
  align-content: start;
}

.page-about .city-group__name {
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .24em;
  color: var(--neon-soft);
}

.page-about .city-group__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
  max-width: 210px;
}

.page-about .city-chip {
  display: inline-flex;
  align-items: center;
  padding: 5px 11px;
  font-size: .82rem;
  color: var(--muted);
  background: rgba(16, 38, 28, .92);
  border: 1px solid var(--line);
  clip-path: polygon(6px 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%, 0 6px);
  transition: color .18s ease, border-color .18s ease;
}

.page-about .city-chip:hover {
  color: var(--score);
  border-color: var(--turf);
}

/* ---------- 档案区 ---------- */
.page-about .archive-grid {
  display: grid;
  gap: clamp(18px, 3vw, 30px);
  margin-top: clamp(20px, 3vw, 32px);
}

@media (min-width: 860px) {
  .page-about .archive-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(220px, .8fr);
    align-items: start;
  }
}

.page-about .archive-grid .figure {
  margin: 0;
}

.page-about .archive-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
}

.page-about .archive-facts li {
  display: grid;
  gap: 5px;
  padding: 14px 16px;
  background: var(--stand);
}

.page-about .archive-facts b {
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .18em;
  color: var(--whistle);
}

.page-about .archive-facts span {
  font-size: .88rem;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 比赛日节奏 ---------- */
.page-about .rhythm {
  list-style: none;
  margin: clamp(18px, 3vw, 28px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}

.page-about .rhythm__item {
  display: grid;
  gap: 7px;
  padding: clamp(14px, 2.2vw, 20px) clamp(16px, 2.6vw, 24px);
  background: var(--stand);
}

.page-about .rhythm__time {
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .1em;
  color: var(--whistle);
}

.page-about .rhythm__item p {
  margin: 0;
  font-size: .96rem;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 团队数据 ---------- */
.page-about .team-stats {
  list-style: none;
  margin: clamp(18px, 3vw, 28px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(128px, 1fr));
  gap: 12px;
}

.page-about .team-stats li {
  display: grid;
  gap: 6px;
  padding: 16px;
  border: 1px solid var(--line);
  background: linear-gradient(150deg, rgba(44, 106, 75, .2), rgba(16, 38, 28, .68));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
}

.page-about .team-stats b {
  font-family: var(--font-mono);
  font-size: clamp(1.7rem, 4vw, 2.3rem);
  font-weight: 900;
  letter-spacing: -.03em;
  color: var(--score);
}

.page-about .team-stats span {
  font-size: .8rem;
  line-height: 1.55;
  color: var(--muted);
}

/* ---------- 年度盘点 ---------- */
.page-about .annual-grid {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  margin-top: clamp(20px, 3vw, 30px);
}

@media (min-width: 900px) {
  .page-about .annual-grid {
    grid-template-columns: minmax(0, 1fr) minmax(230px, 330px);
    align-items: start;
  }
}

.page-about .annual-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  counter-reset: annual;
}

.page-about .annual-list li {
  display: grid;
  gap: 5px;
  padding: 14px 16px 14px 20px;
  border-left: 2px solid var(--turf);
  background: linear-gradient(90deg, rgba(16, 38, 28, .85), rgba(10, 27, 20, .25));
}

.page-about .annual-list__k {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .2em;
  color: var(--whistle);
}

.page-about .annual-list__v {
  font-size: .92rem;
  line-height: 1.72;
  color: var(--muted);
}

.page-about .annual-grid .figure {
  margin: 0;
}

.page-about .annual-grid .figure img {
  aspect-ratio: 4 / 5;
}

/* ---------- 后续入口 ---------- */
.page-about .about-next {
  padding: clamp(46px, 7vw, 92px) 0 clamp(56px, 8vw, 108px);
  border-top: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(10, 27, 20, 0) 0%, rgba(122, 92, 255, .06) 55%, rgba(255, 107, 26, .05) 100%);
}

.page-about .about-next__title {
  margin: 0 0 clamp(18px, 3vw, 28px);
  font-size: clamp(1.3rem, 2.8vw, 1.9rem);
  font-weight: 900;
  letter-spacing: -.02em;
  color: var(--score);
}

.page-about .next-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

@media (min-width: 700px) {
  .page-about .next-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-about .next-links {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
  }
}

.page-about .next-links a {
  display: grid;
  gap: 8px;
  height: 100%;
  padding: 18px 18px 22px;
  text-decoration: none;
  color: var(--muted);
  background: var(--stand);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
  transition: color .2s ease, border-color .2s ease, transform .2s ease;
}

.page-about .next-links a:nth-child(odd) {
  margin-top: 0;
}

@media (min-width: 1080px) {
  .page-about .next-links li:nth-child(even) a {
    margin-top: 18px;
  }
}

.page-about .next-links a:hover,
.page-about .next-links a:focus-visible {
  color: var(--score);
  border-color: var(--whistle);
  transform: translateY(-4px);
}

.page-about .next-links__go {
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .22em;
  color: var(--whistle);
}

.page-about .next-links strong {
  font-size: 1.04rem;
  font-weight: 800;
  color: var(--score);
}

.page-about .next-links span:last-child {
  font-size: .86rem;
  line-height: 1.7;
}

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-hero__dot {
    animation: none;
    opacity: 1;
  }
  .page-about .next-links a,
  .page-about .chapter__next,
  .page-about .city-chip {
    transition: color .15s ease, border-color .15s ease;
  }
  .page-about .next-links a:hover,
  .page-about .next-links a:focus-visible {
    transform: none;
  }
}
</main>