.page-about {
  --about-line: rgba(138, 92, 255, .42);
  --about-line-2: rgba(49, 213, 232, .42);
  --about-card: rgba(20, 27, 54, .74);
  --about-edge: rgba(154, 167, 199, .18);
  --about-edge-soft: rgba(154, 167, 199, .12);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--bh-header-h) + 28px) 0 76px;
  border-bottom: 1px solid var(--about-edge-soft);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, rgba(138, 92, 255, .20) 0%, rgba(11, 16, 32, 0) 46%),
    linear-gradient(315deg, rgba(49, 213, 232, .14) 0%, rgba(11, 16, 32, 0) 42%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: -22%;
  right: -12%;
  width: 62%;
  height: 150%;
  background: linear-gradient(158deg, rgba(28, 36, 80, .82), rgba(11, 16, 32, 0));
  clip-path: polygon(26% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-about .about-hero > .bh-container {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .bh-breadcrumb {
  margin-bottom: 34px;
}

.page-about .about-hero__inner {
  display: grid;
  gap: 40px;
}

.page-about .about-hero .bh-h1 {
  margin: 14px 0 20px;
}

.page-about .about-hero__lead .bh-lede {
  max-width: 56ch;
}

.page-about .about-hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-hero__strip {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--about-edge);
}

.page-about .about-hero__strip li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 18px;
  padding: 15px 2px;
  border-bottom: 1px solid var(--about-edge-soft);
}

.page-about .about-strip__k {
  font-size: 14px;
  letter-spacing: .08em;
  color: var(--bh-mist);
}

.page-about .about-strip__v {
  font-size: 28px;
  line-height: 1;
}

/* ---------- 章节头 ---------- */
.page-about .about-head {
  max-width: 62ch;
  margin-bottom: 40px;
}

.page-about .about-head .bh-h2 {
  margin: 14px 0 12px;
}

.page-about .about-head__sub {
  margin: 0;
  color: var(--bh-text-2);
  font-size: 16px;
  line-height: 1.75;
}

/* ---------- 时间线 ---------- */
.page-about .about-tl-tabs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  margin: 0 0 40px;
  padding-bottom: 10px;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-tl-tabs .bh-tab {
  flex: 0 0 auto;
  white-space: nowrap;
}

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

.page-about .about-tl {
  position: relative;
  display: grid;
  gap: 26px;
  padding-left: 28px;
}

.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--bh-violet) 0%, var(--bh-cyan) 55%, var(--bh-amber) 100%);
  opacity: .55;
}

.page-about .about-node {
  position: relative;
  margin: 0;
  padding: 20px 22px;
  border: 1px solid var(--about-edge);
  border-radius: var(--bh-r-lg);
  background: var(--about-card);
}

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 26px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--bh-ink-900);
  border: 2px solid var(--bh-violet);
  box-shadow: 0 0 12px rgba(138, 92, 255, .55);
}

.page-about .about-node:nth-child(even)::before {
  border-color: var(--bh-cyan);
  box-shadow: 0 0 12px rgba(49, 213, 232, .5);
}

.page-about .about-node__date {
  margin: 0 0 8px;
  font-family: var(--bh-font-mono);
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--bh-cyan);
}

.page-about .about-node__title {
  margin: 0 0 10px;
  font-size: 19px;
  line-height: 1.35;
  color: var(--bh-text);
}

.page-about .about-node__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--bh-text-2);
}

.page-about .about-node--media {
  padding: 0;
  border: 0;
  background: none;
}

.page-about .about-node--media::before {
  display: none;
}

.page-about .about-node--media .bh-media {
  margin: 0;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: 44px;
}

.page-about .about-team__sub {
  margin: 0 0 28px;
  color: var(--bh-text-2);
  font-size: 16px;
  line-height: 1.75;
}

.page-about .about-team__intro .bh-media {
  margin: 0;
}

.page-about .about-roles {
  display: grid;
  gap: 12px;
}

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

.page-about .about-roles .bh-acc__btn {
  display: flex;
  align-items: center;
  gap: 16px;
  width: 100%;
  text-align: left;
}

.page-about .about-roles__name {
  flex: 1 1 auto;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--bh-text);
}

.page-about .about-roles__num {
  font-size: 30px;
  line-height: 1;
  letter-spacing: -.01em;
}

.page-about .about-roles .bh-acc__panel p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--bh-text-2);
}

/* ---------- 规则委员会（奶油纸面板） ---------- */
.page-about .about-committee {
  padding: 36px 28px;
}

.page-about .about-committee__head {
  display: grid;
  gap: 20px;
  align-items: start;
  margin-bottom: 32px;
}

.page-about .about-committee__badge {
  display: inline-block;
  font-size: 72px;
  line-height: .9;
  letter-spacing: -.03em;
  color: var(--bh-brown);
  opacity: .85;
}

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

.page-about .about-committee__lede {
  margin: 0;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.78;
}

.page-about .about-committee__list {
  display: grid;
  gap: 22px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-committee__list li {
  padding-top: 18px;
  border-top: 1px solid rgba(26, 21, 18, .18);
}

.page-about .about-committee__idx {
  display: inline-block;
  margin-bottom: 8px;
  font-family: var(--bh-font-mono);
  font-size: 13px;
  letter-spacing: .16em;
  color: #8A5CFF;
  font-weight: 700;
}

.page-about .about-committee__list h3 {
  margin: 0 0 8px;
  font-size: 18px;
  line-height: 1.4;
}

.page-about .about-committee__list p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
}

/* ---------- 本地 ---------- */
.page-about .about-local__fig {
  margin: 0 0 34px;
}

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

.page-about .about-local__grid li {
  padding: 18px 20px;
  border: 1px solid var(--about-edge);
  border-radius: var(--bh-r-md);
  background: var(--about-card);
}

.page-about .about-local__grid p {
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--bh-text-2);
}

.page-about .about-local__note {
  margin: 26px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--bh-mist);
}

.page-about .about-local__note a {
  color: var(--bh-cyan);
}

/* ---------- 胶囊标签 ---------- */
.page-about .about-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--bh-r-pill);
  border: 1px solid rgba(49, 213, 232, .45);
  color: var(--bh-cyan);
  font-size: 13px;
  letter-spacing: .06em;
  line-height: 1.4;
}

.page-about .about-pill--amber {
  border-color: rgba(242, 179, 61, .5);
  color: var(--bh-amber);
}

/* ---------- 联名伙伴 ---------- */
.page-about .about-partners {
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-partners li {
  padding: 20px 20px 22px;
  border: 1px solid var(--about-edge);
  border-radius: var(--bh-r-lg);
  background: linear-gradient(180deg, rgba(28, 36, 80, .5) 0%, rgba(20, 27, 54, .72) 100%);
}

.page-about .about-partners li p {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.74;
  color: var(--bh-text-2);
}

.page-about .about-partners__note {
  display: grid;
  gap: 20px;
  align-items: center;
  margin-top: 34px;
  padding-top: 28px;
  border-top: 1px solid var(--about-edge-soft);
}

.page-about .about-partners__note p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--bh-text-2);
}

.page-about .about-partners__note .bh-btn {
  justify-self: start;
}

/* ---------- 往后 ---------- */
.page-about .about-next {
  display: grid;
  gap: 18px;
}

.page-about .about-next__card {
  position: relative;
  padding: 26px 22px 24px;
  border: 1px solid var(--about-edge);
  border-radius: var(--bh-r-lg);
  background: var(--about-card);
}

.page-about .about-next__k {
  display: inline-block;
  margin-bottom: 14px;
  font-family: var(--bh-font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--bh-amber);
}

.page-about .about-next__card h3 {
  margin: 0 0 10px;
  font-size: 20px;
  line-height: 1.35;
  color: var(--bh-text);
}

.page-about .about-next__card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.76;
  color: var(--bh-text-2);
}

.page-about .about-next__tail {
  margin: 30px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--bh-mist);
}

.page-about .about-next__tail a {
  color: var(--bh-cyan);
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-about .about-hero {
    padding: calc(var(--bh-header-h) + 46px) 0 104px;
  }

  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    column-gap: 64px;
    align-items: end;
  }

  .page-about .about-tl {
    grid-template-columns: 1fr 1fr;
    column-gap: 76px;
    row-gap: 40px;
    padding-left: 0;
  }

  .page-about .about-tl::before {
    left: 50%;
    transform: translateX(-50%);
  }

  .page-about .about-node:nth-child(odd) {
    grid-column: 1;
  }

  .page-about .about-node:nth-child(even) {
    grid-column: 2;
  }

  .page-about .about-node:nth-child(odd)::before {
    left: auto;
    right: -46px;
    top: 30px;
  }

  .page-about .about-node:nth-child(even)::before {
    left: -46px;
    top: 30px;
  }

  .page-about .about-node--media {
    padding-top: 6px;
  }
}

@media (min-width: 980px) {
  .page-about .about-team {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    column-gap: 56px;
    align-items: start;
  }

  .page-about .about-committee {
    padding: 48px 52px;
  }

  .page-about .about-committee__head {
    grid-template-columns: auto minmax(0, 1fr);
    column-gap: 36px;
    margin-bottom: 40px;
  }

  .page-about .about-committee__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 32px;
  }

  .page-about .about-partners__note {
    grid-template-columns: minmax(0, 1fr) auto;
    column-gap: 40px;
  }

  .page-about .about-partners__note .bh-btn {
    justify-self: end;
  }
}

@media (min-width: 720px) {
  .page-about .about-local__grid,
  .page-about .about-partners {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 1060px) {
  .page-about .about-local__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .about-local__fig {
    margin-bottom: 42px;
  }
}

/* ---------- 窄屏收口 ---------- */
@media (max-width: 480px) {
  .page-about .about-hero__strip li {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .page-about .about-strip__v {
    font-size: 24px;
  }

  .page-about .about-committee {
    padding: 26px 18px;
  }

  .page-about .about-committee__badge {
    font-size: 56px;
  }

  .page-about .about-roles__num {
    font-size: 24px;
  }

  .page-about .about-partners li {
    padding: 18px 16px 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-hero::before,
  .page-about .about-hero::after {
    transition: none;
  }
}