.page-about {
  --about-rhythm: clamp(42px, 5.5vw, 78px);
  --about-hair: rgba(215, 227, 234, 0.11);
  background: var(--ink-black);
  color: var(--ice);
  overflow-x: hidden;
}

.page-about p {
  margin: 0;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-h) + clamp(46px, 8vw, 96px)) 0 clamp(48px, 7vw, 88px);
  background:
    radial-gradient(112% 82% at 88% 4%, rgba(18, 59, 46, 0.95) 0%, rgba(7, 11, 14, 0) 60%),
    radial-gradient(78% 58% at 0% 100%, rgba(63, 140, 255, 0.10) 0%, rgba(7, 11, 14, 0) 62%),
    linear-gradient(180deg, #070b0e 0%, #0a1724 100%);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-hero__wedge,
.page-about .about-hero__wedge--b {
  position: absolute;
  z-index: 0;
  pointer-events: none;
}

.page-about .about-hero__wedge {
  top: -18%;
  right: -14%;
  width: min(60vw, 620px);
  aspect-ratio: 1 / 1;
  background: linear-gradient(140deg, rgba(200, 166, 86, 0.18), rgba(200, 166, 86, 0) 62%);
  clip-path: polygon(100% 0, 0 0, 100% 100%);
}

.page-about .about-hero__wedge--b {
  bottom: -28%;
  left: -10%;
  width: min(46vw, 420px);
  aspect-ratio: 1 / 1;
  background: linear-gradient(20deg, rgba(63, 140, 255, 0.14), rgba(63, 140, 255, 0) 66%);
  clip-path: polygon(0 100%, 100% 100%, 0 0);
}

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

.page-about .about-hero h1 {
  margin: clamp(16px, 2.2vw, 24px) 0 0;
  max-width: 22ch;
  font-family: var(--font-head);
  font-weight: 300;
  font-size: clamp(34px, 5.6vw, 66px);
  line-height: 1.1;
  letter-spacing: 0.01em;
  color: #ffffff;
}

.page-about .about-hero__lede {
  margin-top: clamp(18px, 2.4vw, 28px);
  max-width: 60ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
  color: rgba(215, 227, 234, 0.82);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(30px, 4vw, 52px) 0 0;
  padding: 1px;
  list-style: none;
  background: rgba(200, 166, 86, 0.22);
  border: 1px solid rgba(200, 166, 86, 0.22);
}

.page-about .about-hero__stats li {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 18px 20px;
  background: linear-gradient(160deg, #0a1724 0%, #07100c 100%);
}

.page-about .about-hero__num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 2.6vw, 30px);
  letter-spacing: 0.02em;
  color: var(--crown-gold);
  line-height: 1;
}

.page-about .about-hero__cap {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--mist);
  line-height: 1.5;
}

/* ---------- 手册骨架 ---------- */
.page-about .about-manual {
  padding-block: clamp(52px, 8vw, 108px);
  background:
    radial-gradient(90% 40% at 100% 0%, rgba(12, 43, 34, 0.75) 0%, rgba(7, 11, 14, 0) 58%),
    linear-gradient(180deg, #070b0e 0%, #0a1724 42%, #070b0e 100%);
}

.page-about .about-manual__shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
}

.page-about .about-index {
  display: none;
}

.page-about .about-index__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mist);
  margin-bottom: 14px;
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
}

.page-about .about-index__list a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 11px 0 11px 14px;
  border-left: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.4;
  color: var(--mist);
  text-decoration: none;
  transition: color 0.35s var(--ease), border-color 0.35s var(--ease),
    background-color 0.35s var(--ease);
}

.page-about .about-index__list a span {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--crown-gold);
}

.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible {
  color: var(--light-gold);
  border-left-color: var(--crown-gold);
  background-image: linear-gradient(90deg, rgba(200, 166, 86, 0.12), rgba(200, 166, 86, 0));
  background-repeat: no-repeat;
}

/* ---------- 章节 ---------- */
.page-about .about-chapter {
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-about .about-chapter + .about-chapter {
  margin-top: var(--about-rhythm);
  padding-top: var(--about-rhythm);
  border-top: 1px solid var(--about-hair);
}

.page-about .about-chapter__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(44px, 7vw, 76px);
  line-height: 0.9;
  letter-spacing: 0.04em;
  color: rgba(200, 166, 86, 0.30);
  -webkit-text-stroke: 1px rgba(200, 166, 86, 0.55);
}

.page-about .about-chapter__title {
  margin: 12px 0 0;
  max-width: 24ch;
  font-family: var(--font-head);
  font-weight: 300;
  font-size: clamp(25px, 3.4vw, 40px);
  line-height: 1.22;
  letter-spacing: 0.01em;
  color: var(--ice);
}

.page-about .about-chapter__lede {
  margin-top: 14px;
  max-width: 64ch;
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.85;
  color: rgba(215, 227, 234, 0.78);
}

/* ---------- 图片框 ---------- */
.page-about .about-figure {
  margin: clamp(26px, 3.5vw, 42px) 0 0;
  border: 1px solid var(--line);
  background: linear-gradient(150deg, rgba(18, 59, 46, 0.62), rgba(7, 11, 14, 0.92));
  box-shadow: var(--shadow-micro);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.72) contrast(1.05);
}

.page-about .about-figure figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--about-hair);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  position: relative;
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, rgba(200, 166, 86, 0.6), rgba(63, 140, 255, 0.34) 62%, rgba(63, 140, 255, 0));
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 clamp(24px, 3vw, 36px) clamp(26px, 3.6vw, 42px);
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -3px;
  top: 6px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--crown-gold);
  box-shadow: 0 0 0 4px rgba(200, 166, 86, 0.14);
}

.page-about .about-timeline__year {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--crown-gold);
}

.page-about .about-timeline__body h3 {
  margin: 6px 0 0;
  font-family: var(--font-head);
  font-weight: 500;
  font-size: clamp(17px, 1.9vw, 21px);
  line-height: 1.35;
  letter-spacing: 0.02em;
  color: var(--ice);
}

.page-about .about-timeline__body p {
  margin-top: 6px;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(215, 227, 234, 0.74);
}

/* ---------- 覆盖面板 ---------- */
.page-about .about-coverage {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 34px);
  margin-top: clamp(26px, 3.5vw, 42px);
}

.page-about .about-coverage__panel {
  padding: clamp(20px, 2.6vw, 30px);
  border: 1px solid var(--line);
  background: linear-gradient(165deg, rgba(18, 59, 46, 0.6), rgba(7, 11, 14, 0.92));
}

.page-about .about-coverage__eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .about-league-list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--about-hair);
  border-top: 1px solid var(--about-hair);
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-league-list li {
  padding: 11px 0;
  background: transparent;
  font-size: 15px;
  line-height: 1.6;
  color: var(--ice);
}

.page-about .about-coverage__note {
  margin-top: 16px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-coverage__map {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(18px, 2.4vw, 26px);
  border: 1px solid var(--line);
  background: linear-gradient(200deg, rgba(10, 23, 36, 0.94), rgba(12, 43, 34, 0.5));
}

.page-about .about-node-map {
  display: block;
  width: 100%;
  max-width: 420px;
  height: auto;
  margin: 0 auto;
}

.page-about .about-coverage__caption {
  margin-top: 14px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

/* ---------- 流程 ---------- */
.page-about .about-flow {
  list-style: none;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 32px);
}

.page-about .about-flow__step {
  position: relative;
  padding-top: 18px;
}

.page-about .about-flow__step::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 34px;
  height: 2px;
  background: linear-gradient(90deg, var(--crown-gold), rgba(200, 166, 86, 0));
}

.page-about .about-flow__key {
  display: block;
  font-family: var(--font-head);
  font-weight: 500;
  font-size: clamp(16px, 1.8vw, 19px);
  letter-spacing: 0.06em;
  color: var(--light-gold);
}

.page-about .about-flow__step p {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(215, 227, 234, 0.74);
}

/* ---------- 数字块 ---------- */
.page-about .about-figures {
  list-style: none;
  margin: clamp(30px, 4vw, 46px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--about-hair);
  border-top: 1px solid var(--about-hair);
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-figures li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px 4px 20px 0;
  background: transparent;
}

.page-about .about-figures__value {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.2vw, 38px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--electric);
}

.page-about .about-figures__label {
  font-family: var(--font-head);
  font-size: 15px;
  letter-spacing: 0.08em;
  color: var(--ice);
}

.page-about .about-figures__meta {
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .stamp {
  display: block;
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

/* ---------- 团队 ---------- */
.page-about .about-teams {
  list-style: none;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 34px);
}

.page-about .about-teams li {
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.page-about .about-teams h3 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 500;
  font-size: clamp(17px, 1.9vw, 20px);
  letter-spacing: 0.05em;
  color: var(--crown-gold);
}

.page-about .about-teams p {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(215, 227, 234, 0.76);
}

/* ---------- 合作 ---------- */
.page-about .about-partners {
  list-style: none;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--about-hair);
  border-top: 1px solid var(--about-hair);
}

.page-about .about-partners li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 18px;
  padding: 18px 0;
  background: transparent;
}

.page-about .about-partners__value {
  flex: 0 0 auto;
  min-width: 84px;
  font-family: var(--font-mono);
  font-size: clamp(18px, 2.2vw, 24px);
  letter-spacing: 0.02em;
  color: var(--light-gold);
}

.page-about .about-partners__text {
  flex: 1 1 220px;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(215, 227, 234, 0.78);
}

.page-about .about-honours {
  margin-top: clamp(28px, 3.6vw, 44px);
  padding: clamp(20px, 2.6vw, 30px);
  border: 1px solid var(--line);
  background: linear-gradient(140deg, rgba(12, 43, 34, 0.72), rgba(10, 23, 36, 0.86));
}

.page-about .about-honours__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 500;
  font-size: 16px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--crown-gold);
}

.page-about .about-honours__list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-honours__list li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ice);
}

.page-about .about-honours__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 10px;
  height: 1px;
  background: var(--crown-gold);
}

.page-about .about-honours__note {
  margin-top: 16px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 结尾行动 ---------- */
.page-about .about-cta {
  padding-block: clamp(46px, 6vw, 84px);
  border-top: 1px solid var(--line);
  background:
    radial-gradient(90% 120% at 8% 0%, rgba(18, 59, 46, 0.9) 0%, rgba(7, 11, 14, 0) 62%),
    linear-gradient(180deg, #070b0e 0%, #0a1724 100%);
}

.page-about .about-cta__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.4vw, 48px);
  align-items: end;
}

.page-about .about-cta__text h2 {
  margin: 12px 0 0;
  max-width: 26ch;
  font-family: var(--font-head);
  font-weight: 300;
  font-size: clamp(24px, 3.2vw, 38px);
  line-height: 1.22;
  color: var(--ice);
}

.page-about .about-cta__text p {
  margin-top: 14px;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(215, 227, 234, 0.78);
}

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

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

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

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

  .page-about .about-figures li {
    padding: 24px 22px 24px 0;
  }

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

@media (min-width: 960px) {
  .page-about .about-coverage {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: stretch;
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
  }

  .page-about .about-cta__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 1000px) {
  .page-about .about-manual__shell {
    grid-template-columns: 196px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-index {
    display: block;
    position: sticky;
    top: calc(var(--header-h) + 40px);
  }

  .page-about .about-chapter__num {
    margin-bottom: -4px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-figure--tall {
    max-width: 86%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__list a {
    transition: none;
  }
}