/* ===========================================================
   page-about · 品牌故事
   =========================================================== */

.page-about {
  --ab-rail: 208px;
  --ab-glow-o: rgba(255, 122, 26, .40);
  --ab-glow-v: rgba(123, 92, 255, .34);
  --ab-hair: rgba(30, 39, 72, .9);
}

/* ---------- 面包屑 ---------- */
.page-about .ab-crumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-top: 18px;
  font-size: 13px;
  color: var(--c-mist);
}

.page-about .ab-crumbs a {
  color: var(--c-mist);
  text-decoration: none;
  transition: color var(--t-fast) var(--ease);
}

.page-about .ab-crumbs a:hover,
.page-about .ab-crumbs a:focus-visible {
  color: var(--c-orange);
}

.page-about .ab-crumbs span[aria-current="page"] {
  color: var(--c-moon);
}

/* ---------- 首屏拼贴 ---------- */
.page-about .ab-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 5vw, 56px) 0 clamp(30px, 5vw, 62px);
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  inset: -150px -5% auto -22%;
  height: 540px;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(50% 60% at 22% 34%, var(--ab-glow-v), transparent 72%),
    radial-gradient(44% 52% at 88% 16%, var(--ab-glow-o), transparent 72%);
}

.page-about .ab-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.5vw, 42px);
}

.page-about .ab-hero__lead,
.page-about .ab-hero__side {
  min-width: 0;
}

.page-about .ab-hero__side {
  display: grid;
  gap: 22px;
}

.page-about .ab-h1 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -.03em;
  line-height: 1.06;
  font-size: clamp(32px, 6.6vw, 64px);
  color: var(--c-white);
  text-shadow: 0 0 30px rgba(255, 122, 26, .3);
}

.page-about .ab-hero__lede {
  margin: 0;
  color: var(--c-moon);
  font-size: clamp(15px, .45vw + 13.2px, 17px);
  line-height: 1.85;
  max-width: 46ch;
}

.page-about .ab-facts {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--c-line);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-m);
  overflow: hidden;
}

.page-about .ab-facts li {
  background: var(--c-panel);
  padding: 15px 14px 16px;
  display: grid;
  gap: 6px;
}

.page-about .ab-facts__v {
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 500;
  letter-spacing: .02em;
  line-height: 1;
  color: var(--c-orange);
}

.page-about .ab-facts__k {
  font-size: 12.5px;
  color: var(--c-mist);
  line-height: 1.5;
}

/* ---------- 两栏骨架 ---------- */
.page-about .ab-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 54px);
  padding-bottom: clamp(40px, 6vw, 84px);
}

.page-about .ab-body {
  min-width: 0;
}

/* ---------- 章节索引 ---------- */
.page-about .ab-index__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--c-mist);
}

.page-about .ab-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-about .ab-index__list::-webkit-scrollbar {
  display: none;
}

.page-about .ab-index__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  padding: 9px 14px;
  font-size: 13px;
  color: var(--c-mist);
  text-decoration: none;
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-pill);
  transition: color var(--t-fast) var(--ease),
              border-color var(--t-fast) var(--ease),
              background var(--t-fast) var(--ease);
}

.page-about .ab-index__link .mono {
  font-size: 11px;
  color: var(--c-violet);
  letter-spacing: .04em;
}

.page-about .ab-index__link:hover,
.page-about .ab-index__link:focus-visible {
  color: var(--c-moon);
  border-color: var(--c-orange);
  background: rgba(255, 122, 26, .08);
}

/* ---------- 章节通用 ---------- */
.page-about .ab-sec {
  padding-block: clamp(32px, 5.5vw, 66px);
  border-top: 1px solid var(--c-line);
}

.page-about .ab-body > .ab-sec:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-about .ab-sec__head {
  margin-bottom: clamp(18px, 2.6vw, 28px);
}

.page-about .ab-h2 {
  margin: 10px 0 0;
  font-family: var(--font-serif);
  font-weight: 700;
  letter-spacing: -.012em;
  line-height: 1.26;
  font-size: clamp(24px, 3.2vw, 38px);
  color: var(--c-white);
}

.page-about .ab-prose {
  max-width: 68ch;
}

.page-about .ab-prose p {
  margin: 0 0 1.05em;
  color: var(--c-moon);
  font-size: clamp(15px, .42vw + 13.4px, 17px);
  line-height: 1.85;
}

.page-about .ab-prose p:last-child {
  margin-bottom: 0;
}

.page-about .ab-prose a {
  color: var(--c-amber);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 196, 107, .42);
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-about .ab-prose a:hover,
.page-about .ab-prose a:focus-visible {
  color: var(--c-orange);
  border-bottom-color: var(--c-orange);
}

/* ---------- 时间线信息图 ---------- */
.page-about .ab-roadmap-scroll {
  margin-top: clamp(20px, 3vw, 30px);
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-width: thin;
}

.page-about .ab-roadmap {
  display: block;
  width: 100%;
  min-width: 660px;
  height: auto;
}

.page-about .ab-roadmap .ab-road-line {
  fill: none;
  stroke-width: 2;
}

.page-about .ab-roadmap .ab-road-node circle {
  fill: var(--c-void);
  stroke: var(--c-orange);
  stroke-width: 2;
}

.page-about .ab-roadmap .ab-road-node:last-child circle {
  fill: var(--c-orange);
  stroke: var(--c-amber);
}

.page-about .ab-roadmap .ab-road-year {
  font-family: var(--font-mono);
  font-size: 16px;
  letter-spacing: .08em;
  fill: var(--c-amber);
}

.page-about .ab-roadmap .ab-road-cap {
  font-family: var(--font-body);
  font-size: 17px;
  fill: var(--c-moon);
}

/* ---------- 阶段列表 ---------- */
.page-about .ab-stages {
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-stage {
  position: relative;
  padding: 20px 0 20px 26px;
  border-left: 1px solid var(--c-line);
}

.page-about .ab-stage::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 27px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--c-orange);
  box-shadow: 0 0 12px rgba(255, 122, 26, .55);
}

.page-about .ab-stage__year {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--c-mist);
  line-height: 1.6;
}

.page-about .ab-stage__title {
  margin: 0 0 7px;
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--c-white);
}

.page-about .ab-stage__body p {
  margin: 0;
  max-width: 62ch;
  color: var(--c-moon);
  font-size: 15px;
  line-height: 1.8;
}

/* ---------- 要点小卡 ---------- */
.page-about .ab-note-grid {
  margin-top: clamp(20px, 3vw, 30px);
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
}

.page-about .ab-note {
  padding: 16px 18px;
  background: var(--c-ink);
  border: 1px solid var(--c-line);
  border-left: 2px solid var(--c-violet);
  border-radius: 0 var(--radius-m) var(--radius-m) 0;
}

.page-about .ab-note__k {
  margin: 0 0 7px;
  font-family: var(--font-mono);
  font-size: 19px;
  letter-spacing: .02em;
  line-height: 1.2;
  color: var(--c-amber);
}

.page-about .ab-note__v {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--c-mist);
}

/* ---------- CTA 行 ---------- */
.page-about .ab-cta-row {
  margin-top: clamp(22px, 3vw, 32px);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 团队区块 ---------- */
.page-about .ab-team {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3vw, 34px);
}

.page-about .ab-team__main {
  min-width: 0;
}

.page-about .ab-split {
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: var(--c-line);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-m);
  overflow: hidden;
}

.page-about .ab-split li {
  background: var(--c-panel);
  padding: 16px 18px;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 16px;
  align-items: baseline;
}

.page-about .ab-split__n {
  font-family: var(--font-mono);
  font-size: 25px;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--c-orange);
  grid-row: 1 / span 2;
}

.page-about .ab-split__t {
  font-size: 15px;
  font-weight: 700;
  color: var(--c-white);
}

.page-about .ab-split__d {
  grid-column: 2;
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-mist);
}

/* ---------- 图片容器 ---------- */
.page-about .ab-photo {
  position: relative;
  margin: 0;
  overflow: hidden;
  background: var(--c-ink);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-m);
}

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

.page-about .ab-photo--tall img {
  aspect-ratio: 3 / 4;
}

.page-about .ab-photo--wide {
  margin-top: clamp(20px, 3vw, 28px);
}

.page-about .ab-photo--wide img {
  aspect-ratio: 2 / 1;
}

.page-about .ab-photo figcaption {
  padding: 12px 16px 13px;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--c-mist);
  background: var(--c-ink);
  border-top: 1px solid var(--c-line);
}

/* ---------- 赛事海报块 ---------- */
.page-about .ab-cup {
  position: relative;
  display: grid;
  margin-top: clamp(22px, 3vw, 30px);
  overflow: hidden;
  background: var(--c-void);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-m);
}

.page-about .ab-cup > * {
  grid-area: 1 / 1;
}

.page-about .ab-cup__img {
  width: 100%;
  height: 100%;
  min-height: 330px;
  object-fit: cover;
  opacity: .45;
}

.page-about .ab-cup__panel {
  align-self: end;
  padding: clamp(22px, 4vw, 40px);
  background: linear-gradient(180deg, rgba(5, 7, 15, 0) 0%, rgba(5, 7, 15, .84) 36%, rgba(5, 7, 15, .97) 100%);
}

.page-about .ab-cup__lead {
  margin: 0 0 18px;
  max-width: 60ch;
  color: var(--c-moon);
  font-size: clamp(14.5px, .4vw + 13.4px, 16.5px);
  line-height: 1.85;
}

.page-about .ab-cup__lead a {
  color: var(--c-amber);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 196, 107, .42);
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-about .ab-cup__lead a:hover,
.page-about .ab-cup__lead a:focus-visible {
  color: var(--c-orange);
  border-bottom-color: var(--c-orange);
}

.page-about .ab-cup__stats {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
}

.page-about .ab-cup__stats li {
  font-size: 13.5px;
  color: var(--c-mist);
}

.page-about .ab-cup__stats .mono {
  margin-right: 4px;
  font-size: 16px;
  color: var(--c-amber);
}

/* ---------- 服务数字矩阵 ---------- */
.page-about .ab-metrics {
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(148px, 1fr));
  gap: 1px;
  background: var(--c-line);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-m);
  overflow: hidden;
}

.page-about .ab-metrics li {
  background: var(--c-ink);
  padding: 20px 18px 22px;
  display: grid;
  align-content: start;
  gap: 3px;
}

.page-about .ab-metrics__n {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3vw, 34px);
  line-height: 1;
  letter-spacing: .01em;
  color: var(--c-orange);
}

.page-about .ab-metrics__u {
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--c-mist);
}

.page-about .ab-metrics__t {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-moon);
}

/* ---------- 焦点可见性 ---------- */
.page-about a:focus-visible,
.page-about button:focus-visible {
  outline: 2px solid var(--c-violet);
  outline-offset: 2px;
}

/* ===========================================================
   断点
   =========================================================== */

@media (min-width: 700px) {
  .page-about .ab-stage {
    display: grid;
    grid-template-columns: 112px minmax(0, 1fr);
    gap: 0 24px;
    padding-left: 30px;
  }

  .page-about .ab-stage__year {
    margin-bottom: 0;
    font-size: 14px;
    line-height: 1.9;
  }
}

@media (min-width: 860px) {
  .page-about .ab-team {
    grid-template-columns: minmax(0, 1fr) 296px;
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }

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

@media (min-width: 1024px) {
  .page-about .ab-layout {
    grid-template-columns: var(--ab-rail) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .ab-index {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }

  .page-about .ab-index__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
    border-left: 1px solid var(--c-line);
  }

  .page-about .ab-index__link {
    display: flex;
    justify-content: flex-start;
    padding: 11px 12px 11px 14px;
    margin-left: -1px;
    font-size: 14px;
    background: transparent;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
  }

  .page-about .ab-index__link:hover,
  .page-about .ab-index__link:focus-visible {
    background: rgba(255, 122, 26, .07);
    border-left-color: var(--c-orange);
    color: var(--c-orange);
  }

  .page-about .ab-index__link:hover .mono,
  .page-about .ab-index__link:focus-visible .mono {
    color: var(--c-amber);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-index__link,
  .page-about .ab-prose a,
  .page-about .ab-crumbs a {
    transition: none;
  }
}