.page-about {
  --about-gap: clamp(28px, 5vw, 64px);
  --about-block: clamp(52px, 8vw, 104px);
  display: block;
  padding-inline: clamp(16px, 4vw, 44px);
  padding-block: clamp(16px, 3vw, 28px) clamp(56px, 9vw, 112px);
  color: var(--bw-paper);
  font-family: var(--bw-sans);
}

.page-about .about-inline-link {
  color: var(--bw-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 201, 193, .45);
  padding-bottom: 1px;
  transition: border-color .25s var(--bw-ease), color .25s var(--bw-ease);
}

.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  color: var(--bw-paper);
  border-bottom-color: var(--bw-paper);
}

.page-about .about-inline-link:focus-visible {
  outline: 2px solid var(--bw-cyan);
  outline-offset: 3px;
}

/* ---------- 面包屑 ---------- */
.page-about .bw-crumbs {
  margin-bottom: clamp(20px, 4vw, 40px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
  align-items: end;
  padding-bottom: var(--about-block);
  border-bottom: 1px solid var(--bw-line-soft);
}

.page-about .about-hero__title {
  font-family: var(--bw-narrow);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.06;
  font-size: clamp(2rem, 7.4vw, 4.4rem);
  margin: 14px 0 20px;
  max-width: 15ch;
  color: var(--bw-paper);
}

.page-about .about-hero__lede {
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--bw-paper-soft);
  max-width: 46ch;
  margin: 0 0 24px;
}

.page-about .about-hero__meta {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 12px;
}

.page-about .about-hero__meta li {
  font-size: 12px;
  letter-spacing: .01em;
  color: var(--bw-mute);
  border: 1px solid var(--bw-line-soft);
  border-radius: 999px;
  padding: 6px 14px;
  background: rgba(13, 46, 39, .42);
}

.page-about .about-hero__figwrap {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.page-about .about-hero__vertical {
  font-family: var(--bw-mono);
  font-size: 11px;
  letter-spacing: .34em;
  color: var(--bw-mute);
  align-self: flex-start;
}

.page-about .about-media {
  position: relative;
  display: block;
  overflow: hidden;
  border-radius: var(--bw-r-lg);
  background: linear-gradient(160deg, var(--bw-green) 0%, var(--bw-night-deep) 100%);
  box-shadow: var(--bw-shadow);
}

.page-about .about-media .bw-media__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(.68) contrast(1.06) brightness(.92);
}

.page-about .about-media .bw-media__cap {
  position: relative;
  display: block;
  padding: 12px 16px 16px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--bw-mute);
  background: linear-gradient(180deg, rgba(10, 22, 34, 0) 0%, rgba(10, 22, 34, .9) 42%);
  margin-top: -32px;
}

/* ---------- 主体网格 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
  margin-top: var(--about-block);
}

.page-about .about-main {
  display: flex;
  flex-direction: column;
  gap: var(--about-block);
  min-width: 0;
}

.page-about .about-main > .bw-section {
  scroll-margin-top: calc(var(--bw-bar) + 32px);
}

/* ---------- 目录（仅桌面端） ---------- */
.page-about .about-toc {
  display: none;
}

.page-about .about-toc__title {
  font-family: var(--bw-mono);
  font-size: 11px;
  letter-spacing: .28em;
  color: var(--bw-mute);
  margin: 0 0 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--bw-line-soft);
}

.page-about .about-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: toc;
}

.page-about .about-toc__list li {
  counter-increment: toc;
  margin-bottom: 2px;
}

.page-about .about-toc__link {
  display: flex;
  gap: 10px;
  padding: 6px 0;
  font-size: 13px;
  line-height: 1.5;
  color: var(--bw-mute);
  text-decoration: none;
  transition: color .2s var(--bw-ease);
}

.page-about .about-toc__link::before {
  content: counter(toc, decimal-leading-zero);
  font-family: var(--bw-mono);
  font-size: 11px;
  color: var(--bw-line);
  transition: color .2s var(--bw-ease);
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible {
  color: var(--bw-paper);
}

.page-about .about-toc__link:hover::before,
.page-about .about-toc__link:focus-visible::before {
  color: var(--bw-cyan);
}

.page-about .about-toc__link:focus-visible {
  outline: 2px solid var(--bw-cyan);
  outline-offset: 2px;
}

/* ---------- 通用小节标题 ---------- */
.page-about .bw-section .bw-title {
  margin: 12px 0 22px;
  max-width: 22ch;
}

.page-about .bw-section .bw-body {
  max-width: 40ch;
  margin: 0 0 18px;
}

/* ---------- 01 选题边界 ---------- */
.page-about .about-why {
  position: relative;
  isolation: isolate;
  padding-block: clamp(32px, 5vw, 56px);
}

.page-about .about-why__blob {
  position: absolute;
  inset: -4% -3% -6% -2%;
  z-index: -1;
  background:
    radial-gradient(70% 90% at 12% 8%, rgba(13, 46, 39, .92) 0%, rgba(13, 46, 39, 0) 68%),
    radial-gradient(60% 80% at 92% 88%, rgba(53, 201, 193, .12) 0%, rgba(53, 201, 193, 0) 70%),
    linear-gradient(178deg, rgba(22, 70, 59, .82) 0%, rgba(10, 22, 34, 0) 88%);
  border-radius: 46% 54% 32% 68% / 62% 38% 66% 34%;
}

.page-about .about-why__title {
  max-width: 16ch;
}

.page-about .about-why__cols {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

.page-about .about-why__note {
  margin-top: 26px;
  padding-left: 16px;
  border-left: 2px solid var(--bw-cyan);
  max-width: 52ch;
}

/* ---------- 02 读者场景 ---------- */
.page-about .about-cross .bw-body {
  max-width: 52ch;
}

.page-about .about-leagues {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin: 26px 0 14px;
  padding: 0;
  max-width: 460px;
}

.page-about .about-leagues__item {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 14px 6px;
  font-size: 14px;
  color: var(--bw-gold);
  border: 1px solid rgba(227, 167, 60, .34);
  border-radius: var(--bw-r-md);
  background: linear-gradient(150deg, rgba(227, 167, 60, .1) 0%, rgba(227, 167, 60, 0) 82%);
}

.page-about .about-leagues__note {
  max-width: 52ch;
  margin-bottom: 24px;
}

/* ---------- 03 维护流程 ---------- */
.page-about .about-flow__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
  align-items: start;
  margin-top: 8px;
}

.page-about .about-flow__media {
  max-width: 520px;
}

.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-flow__item:last-child .about-flow__toggle {
  border-bottom: 1px solid var(--bw-line-soft);
}

.page-about .about-flow__toggle {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr);
  column-gap: 14px;
  row-gap: 4px;
  width: 100%;
  text-align: left;
  background: transparent;
  border: 0;
  border-top: 1px solid var(--bw-line-soft);
  padding: 20px 4px 18px;
  color: inherit;
  font: inherit;
  cursor: pointer;
  transition: background-color .25s var(--bw-ease);
}

.page-about .about-flow__toggle:hover {
  background: rgba(22, 70, 59, .5);
}

.page-about .about-flow__toggle:focus-visible {
  outline: 2px solid var(--bw-cyan);
  outline-offset: -2px;
}

.page-about .about-flow__idx {
  grid-column: 1;
  grid-row: 1 / span 2;
  align-self: start;
  font-size: 22px;
  line-height: 1;
  color: var(--bw-flare);
  font-variant-numeric: tabular-nums;
}

.page-about .about-flow__name {
  grid-column: 2;
  grid-row: 1;
  font-family: var(--bw-narrow);
  font-weight: 700;
  letter-spacing: -0.01em;
  font-size: clamp(17px, 2.1vw, 21px);
  color: var(--bw-paper);
}

.page-about .about-flow .bw-fold__meta {
  grid-column: 2;
  grid-row: 2;
  font-family: var(--bw-mono);
  font-size: 11.5px;
  letter-spacing: .01em;
  color: var(--bw-mute);
}

.page-about .about-flow .bw-fold__inner {
  padding: 4px 4px 22px 72px;
}

.page-about .about-flow .bw-fold__inner p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--bw-paper-soft);
  max-width: 46ch;
}

.page-about .about-flow-section > .bw-note {
  margin-top: 22px;
  max-width: 56ch;
}

/* ---------- 04 赛季归档 ---------- */
.page-about .about-archive .bw-body {
  max-width: 54ch;
}

.page-about .about-timeline {
  list-style: none;
  margin: 34px 0 0;
  padding: 0 0 0 32px;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 14px;
  width: 1px;
  background: linear-gradient(180deg, var(--bw-cyan) 0%, var(--bw-line-soft) 58%, rgba(58, 77, 89, 0) 100%);
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: clamp(28px, 4vw, 44px);
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -32px;
  top: 5px;
  width: 14px;
  height: 14px;
  border-radius: 50% 50% 50% 5px;
  background: var(--bw-night);
  border: 1px solid var(--bw-cyan);
  box-shadow: 0 0 0 4px rgba(53, 201, 193, .1);
}

.page-about .about-timeline__year {
  display: block;
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--bw-cyan);
  margin-bottom: 8px;
}

.page-about .about-timeline__body .bw-sub {
  margin: 0 0 8px;
  font-family: var(--bw-narrow);
  font-weight: 700;
  letter-spacing: -0.01em;
  font-size: clamp(17px, 2vw, 20px);
  color: var(--bw-paper);
}

.page-about .about-timeline__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--bw-paper-soft);
  max-width: 48ch;
}

.page-about .about-archive__media {
  margin-top: clamp(30px, 5vw, 52px);
  max-width: 640px;
}

/* ---------- 05 分工与节奏 ---------- */
.page-about .about-team__grid {
  margin: 6px 0 28px;
  gap: 14px;
}

.page-about .about-team__card {
  padding: 22px 20px 20px;
  border: 1px solid var(--bw-line-soft);
  border-radius: var(--bw-r-md);
  background: linear-gradient(165deg, rgba(13, 46, 39, .72) 0%, rgba(10, 22, 34, .3) 100%);
}

.page-about .about-team__num {
  font-size: clamp(30px, 5vw, 40px);
  line-height: 1;
  color: var(--bw-gold);
  margin: 0 0 10px;
  letter-spacing: -0.01em;
}

.page-about .about-team__label {
  margin: 0 0 10px;
  font-size: 14px;
  letter-spacing: .01em;
  color: var(--bw-paper);
}

.page-about .about-team__card .bw-note {
  margin: 0;
}

.page-about .about-team .bw-body {
  max-width: 52ch;
}

/* ---------- 06 署名与备案 ---------- */
.page-about .about-info__list {
  margin: 26px 0 0;
  padding: 0;
  border-top: 1px solid var(--bw-line-soft);
}

.page-about .about-info__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 14px 2px;
  border-bottom: 1px solid var(--bw-line-soft);
}

.page-about .about-info__row dt {
  font-family: var(--bw-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--bw-mute);
}

.page-about .about-info__row dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--bw-paper);
  word-break: break-word;
}

.page-about .about-info__note {
  margin-top: 22px;
  max-width: 58ch;
  padding-left: 16px;
  border-left: 2px solid var(--bw-line);
}

.page-about .about-info .bw-body {
  max-width: 52ch;
}

/* ---------- 口径边界引文 ---------- */
.page-about .about-boundary {
  position: relative;
  padding: clamp(28px, 5vw, 48px) clamp(22px, 4vw, 48px);
  border: 1px solid var(--bw-line-soft);
  border-radius: var(--bw-r-lg);
  background:
    radial-gradient(80% 120% at 100% 0%, rgba(53, 201, 193, .12) 0%, rgba(53, 201, 193, 0) 62%),
    linear-gradient(150deg, var(--bw-green) 0%, var(--bw-night) 96%);
  overflow: hidden;
}

.page-about .about-boundary::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--bw-cyan) 0%, rgba(53, 201, 193, .12) 100%);
}

.page-about .about-boundary__text {
  margin: 0;
  font-family: var(--bw-narrow);
  font-weight: 700;
  letter-spacing: -0.01em;
  font-size: clamp(17px, 2.4vw, 24px);
  line-height: 1.62;
  color: var(--bw-paper);
  max-width: 34ch;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .about-why__cols {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px;
  }

  .page-about .about-leagues {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    max-width: none;
  }

  .page-about .about-info__row {
    grid-template-columns: 168px minmax(0, 1fr);
    align-items: baseline;
    gap: 18px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
  }

  .page-about .about-hero__vertical {
    align-self: flex-end;
    margin-bottom: 6px;
  }

  .page-about .about-flow__layout {
    grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
  }

  .page-about .about-flow__media {
    position: sticky;
    top: calc(var(--bw-bar) + 28px);
  }
}

@media (min-width: 1080px) {
  .page-about .about-body {
    grid-template-columns: minmax(0, 1fr) 198px;
    align-items: start;
  }

  .page-about .about-toc {
    display: block;
    position: sticky;
    top: calc(var(--bw-bar) + 32px);
    padding-top: 6px;
  }
}

@media (min-width: 1280px) {
  .page-about .about-hero__title {
    font-size: clamp(3rem, 5vw, 4.6rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-inline-link,
  .page-about .about-flow__toggle,
  .page-about .about-toc__link {
    transition: none;
  }

  .page-about .about-flow__media {
    position: static;
  }
}
</main>