.page-about {
  --about-narrow: 620px;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  max-width: var(--shell);
  margin: 0 auto;
  padding: clamp(16px, 3vw, 26px) var(--gutter) 0;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(28px, 5vw, 56px) 0 clamp(44px, 6vw, 84px);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 5vw, 56px);
  align-items: center;
}

.page-about .kicker {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--gold-deep);
}

.page-about .about-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(32px, 6.4vw, 62px);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: .01em;
}

.page-about .about-hero__lead {
  margin: 22px 0 0;
  max-width: 36em;
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.9;
  color: #2E3340;
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 34px 0 0;
  padding: 24px 0 0;
  border-top: 1px solid var(--line-strong);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 18px 16px;
}

.page-about .about-hero__facts strong {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(28px, 4.4vw, 40px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--gold-deep);
}

.page-about .about-hero__facts span {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.55;
  color: var(--slate);
}

.page-about .about-hero__art {
  position: relative;
  padding: clamp(24px, 4vw, 40px);
  min-height: 280px;
  border-radius: var(--radius-lg);
  background:
    radial-gradient(120% 90% at 12% 0%, rgba(212, 160, 23, .26), transparent 58%),
    linear-gradient(152deg, var(--night) 0%, #241F42 58%, #14161B 100%);
  overflow: hidden;
  clip-path: polygon(0 7%, 100% 0, 100% 100%, 0 93%);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.page-about .about-hero__art::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(199, 205, 212, .1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(199, 205, 212, .1) 1px, transparent 1px);
  background-size: 26px 26px;
  pointer-events: none;
}

.page-about .about-hero__badge {
  position: relative;
  z-index: 1;
  align-self: flex-start;
  padding: 7px 14px;
  border-radius: var(--radius-pill);
  background: rgba(123, 77, 255, .9);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
}

.page-about .about-hero__svg {
  position: relative;
  z-index: 1;
  width: 100%;
  height: auto;
  margin: auto 0;
}

.page-about .about-hero__artcap {
  position: relative;
  z-index: 1;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--silver);
}

/* ---------- 章节索引 ---------- */
.page-about .index-rail {
  display: flex;
  gap: 8px;
  padding: 12px var(--gutter);
  overflow-x: auto;
  scrollbar-width: none;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--paper-raised);
}

.page-about .index-rail::-webkit-scrollbar {
  display: none;
}

.page-about .index-rail__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 16px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line-strong);
  color: var(--ink);
  text-decoration: none;
  font-size: 14px;
  transition: background-color .22s var(--ease), color .22s var(--ease), border-color .22s var(--ease);
}

.page-about .index-rail__link:hover,
.page-about .index-rail__link:focus-visible {
  border-color: var(--gold);
}

.page-about .index-rail__link.is-active {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

.page-about .index-rail__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--gold-deep);
}

.page-about .index-rail__link.is-active .index-rail__num {
  color: var(--gold-bright);
}

/* ---------- 通用章节 ---------- */
.page-about .chapter {
  padding: clamp(56px, 9vw, 130px) 0;
}

.page-about .narrow {
  max-width: var(--about-narrow);
}

.page-about .chapter__title {
  margin: 0 0 22px;
  font-family: var(--font-serif);
  font-size: clamp(25px, 3.6vw, 40px);
  font-weight: 600;
  line-height: 1.28;
  letter-spacing: .01em;
}

.page-about .chapter__lead {
  max-width: 46em;
  margin: 0 0 8px;
  font-size: clamp(16px, 1.5vw, 17.5px);
  line-height: 1.9;
  color: #2E3340;
}

.page-about .body-copy p {
  margin: 0 0 1.2em;
  font-size: clamp(16px, 1.5vw, 17.5px);
  line-height: 1.9;
  color: #2E3340;
}

.page-about .body-copy p:last-child {
  margin-bottom: 0;
}

.page-about .dark-card {
  margin: clamp(32px, 4vw, 48px) 0 0;
  padding: clamp(26px, 4vw, 48px);
  border-radius: var(--radius-lg);
  background: linear-gradient(140deg, var(--night) 0%, #17142A 100%);
  box-shadow: inset 0 0 0 1px rgba(212, 160, 23, .28);
}

.page-about .dark-card p {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(19px, 2.4vw, 27px);
  line-height: 1.62;
  color: #F2ECDF;
}

.page-about .inline-note {
  max-width: 46em;
  margin: clamp(30px, 4vw, 44px) 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--gold);
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--slate);
}

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

.page-about .link-more {
  display: inline-block;
  margin-top: 24px;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: .03em;
  color: var(--blue-ink);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 2px;
}

/* ---------- 团队面板 ---------- */
.page-about .team-stack {
  display: grid;
  gap: 12px;
  margin: clamp(28px, 4vw, 44px) 0 0;
}

.page-about .team-stack .panel {
  border-radius: var(--radius);
  border: 1px solid var(--line-strong);
  background: var(--paper-raised);
  overflow: hidden;
}

.page-about .team-stack .panel[data-open] {
  border-color: rgba(212, 160, 23, .5);
  box-shadow: 0 10px 28px rgba(20, 22, 27, .07);
}

.page-about .team-stack .panel__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  width: 100%;
  padding: 18px clamp(18px, 2.4vw, 26px);
  background: transparent;
  border: 0;
  cursor: pointer;
  text-align: left;
  font-family: inherit;
}

.page-about .team-stack__name {
  font-family: var(--font-serif);
  font-size: clamp(17px, 1.8vw, 21px);
  font-weight: 600;
  color: var(--ink);
}

.page-about .team-stack__count {
  flex: 0 0 auto;
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  background: rgba(212, 160, 23, .16);
  color: var(--gold-deep);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
}

.page-about .team-stack .panel__body {
  padding: 0 clamp(18px, 2.4vw, 26px) 22px;
}

.page-about .team-stack .panel__body p {
  margin: 0;
  max-width: 54em;
  font-size: 16px;
  line-height: 1.88;
  color: #2E3340;
}

/* ---------- 图版 ---------- */
.page-about .plate {
  margin: clamp(32px, 5vw, 64px) 0 0;
}

.page-about .plate img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  object-fit: cover;
  border: 1px solid var(--line);
  background: var(--paper-raised);
}

.page-about .plate__cap {
  margin: 14px 0 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.7;
  letter-spacing: .04em;
  color: var(--slate);
}

.page-about .plate--bleed {
  width: 100vw;
  margin-left: calc(50% - 50vw);
  margin-right: calc(50% - 50vw);
  padding: 0 0 clamp(10px, 2vw, 22px);
}

.page-about .plate--bleed img {
  border-radius: 0;
  border-left: 0;
  border-right: 0;
}

.page-about .plate--bleed .plate__cap {
  max-width: var(--shell);
  margin-left: auto;
  margin-right: auto;
  padding: 0 var(--gutter);
}

/* ---------- 流程时间轴 ---------- */
.page-about .flow {
  list-style: none;
  margin: clamp(36px, 5vw, 60px) 0 0;
  padding: 0;
  counter-reset: flow;
}

.page-about .flow__step {
  position: relative;
  padding: 0 0 36px 48px;
  border-left: 2px solid var(--gold);
}

.page-about .flow__step:last-child {
  border-left-color: transparent;
  padding-bottom: 0;
}

.page-about .flow__num {
  position: absolute;
  left: -17px;
  top: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--gold);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--gold-deep);
}

.page-about .flow__title {
  margin: 4px 0 8px;
  font-family: var(--font-serif);
  font-size: 19px;
  font-weight: 600;
  line-height: 1.4;
}

.page-about .flow__step p {
  margin: 0;
  max-width: 30em;
  font-size: 15.5px;
  line-height: 1.85;
  color: #2E3340;
}

/* ---------- 赛季历程 ---------- */
.page-about .seasons {
  list-style: none;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0 var(--gutter) 8px;
  display: flex;
  gap: 16px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
}

.page-about .seasons__item {
  flex: 0 0 min(78vw, 288px);
  scroll-snap-align: start;
  padding: 24px 22px 26px;
  border-radius: var(--radius-lg);
  background: var(--paper-raised);
  border: 1px solid var(--line-strong);
  box-shadow: 0 12px 26px rgba(20, 22, 27, .05);
}

.page-about .seasons__item::before {
  content: "";
  display: block;
  width: 42px;
  height: 2px;
  margin-bottom: 18px;
  background: linear-gradient(90deg, var(--gold-deep), var(--gold-bright));
}

.page-about .seasons__title {
  margin: 14px 0 10px;
  font-family: var(--font-serif);
  font-size: 19px;
  font-weight: 600;
  line-height: 1.42;
}

.page-about .seasons__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: #2E3340;
}

/* ---------- 合作生态 ---------- */
.page-about .partners {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 52px);
  align-items: center;
}

.page-about .plate--square {
  margin-top: 0;
}

.page-about .plate--square img {
  border-radius: var(--radius-lg);
}

/* ---------- 三张主张卡 ---------- */
.page-about .values {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  margin: clamp(30px, 4vw, 48px) 0 0;
}

.page-about .value {
  position: relative;
  padding: clamp(24px, 3vw, 34px);
  border-radius: var(--radius-lg);
  background: var(--paper-raised);
  border: 1px solid var(--line-strong);
  transition: transform .24s var(--ease), box-shadow .24s var(--ease), border-color .24s var(--ease);
}

.page-about .value:hover {
  transform: translateY(-3px);
  border-color: rgba(212, 160, 23, .55);
  box-shadow: 0 16px 34px rgba(20, 22, 27, .08);
}

.page-about .value__num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--gold-deep);
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(212, 160, 23, .35);
}

.page-about .value__title {
  margin: 18px 0 12px;
  font-family: var(--font-serif);
  font-size: clamp(19px, 2vw, 23px);
  font-weight: 600;
  line-height: 1.4;
}

.page-about .value p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.88;
  color: #2E3340;
}

.page-about .values__more {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: clamp(30px, 4vw, 44px) 0 0;
}

/* ---------- 桌面端 ---------- */
@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, .96fr);
  }

  .page-about .about-hero__art {
    min-height: 420px;
  }

  .page-about .flow {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 0;
    margin-top: clamp(52px, 6vw, 72px);
  }

  .page-about .flow__step {
    position: relative;
    padding: 46px 26px 0 0;
    border-left: 0;
  }

  .page-about .flow__step:last-child {
    padding-right: 0;
  }

  .page-about .flow__step::before {
    content: "";
    position: absolute;
    top: 15px;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--gold-deep), var(--gold-bright), var(--gold-deep));
    opacity: .6;
  }

  .page-about .flow__step:last-child::before {
    right: 55%;
  }

  .page-about .flow__num {
    position: absolute;
    top: 0;
    left: 0;
    margin: 0;
  }

  .page-about .flow__title {
    margin-top: 0;
  }

  .page-about .partners {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  }

  .page-about .values {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }

  .page-about .seasons {
    padding-left: max(var(--gutter), calc((100vw - var(--shell)) / 2));
    padding-right: max(var(--gutter), calc((100vw - var(--shell)) / 2));
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero__title {
    font-size: 62px;
  }
}

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

  .page-about .value:hover {
    transform: none;
  }
}