.page-about {
  --about-gold-soft: rgba(201, 163, 78, 0.36);
  --about-hair: rgba(10, 15, 13, 0.14);
  --about-hair-light: rgba(244, 247, 242, 0.16);
  background: var(--paper-050);
  color: var(--black-900);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

/* 面包屑 */
.page-about .about-crumb {
  padding: clamp(16px, 3vw, 28px) 0 0;
}
.page-about .about-crumb .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--green-600);
}
.page-about .about-crumb .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: 0.4rem;
  color: var(--gold-500);
}
.page-about .about-crumb .breadcrumb__link {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s var(--ease), color 0.25s var(--ease);
}
.page-about .about-crumb .breadcrumb__link:hover,
.page-about .about-crumb .breadcrumb__link:focus-visible {
  color: var(--ink-950);
  border-bottom-color: var(--gold-500);
}

/* 品牌主题墙 */
.page-about .about-wall {
  position: relative;
  margin-top: clamp(16px, 3vw, 30px);
  padding: clamp(34px, 6vw, 70px) 0 clamp(40px, 7vw, 86px);
  background:
    radial-gradient(120% 90% at 84% -12%, rgba(201, 163, 78, 0.18), transparent 62%),
    var(--ink-900);
  color: var(--paper-050);
  overflow: hidden;
}
.page-about .about-wall::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold-500) 24%, var(--gold-500) 62%, transparent);
  opacity: 0.6;
}
.page-about .about-wall__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 5vw, 58px);
  align-items: center;
}
.page-about .about-wall .eyebrow {
  color: var(--gold-300);
  margin: 0 0 16px;
}
.page-about .about-wall__title {
  margin: 0 0 20px;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(1.85rem, 5.4vw, 3.3rem);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--paper-050);
  transform: skew(-3deg);
  transform-origin: left bottom;
  max-width: 18ch;
}
.page-about .about-wall__lede {
  margin: 0 0 26px;
  font-size: clamp(0.96rem, 1.9vw, 1.06rem);
  line-height: 1.85;
  color: rgba(244, 247, 242, 0.84);
  max-width: 40ch;
}
.page-about .about-wall__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 30px;
  margin: 0;
  padding: 20px 0 0;
  list-style: none;
  border-top: 1px solid var(--about-hair-light);
}
.page-about .about-wall__facts li {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.page-about .about-wall__facts .mono {
  font-family: var(--font-mono);
  font-size: clamp(1.25rem, 2.6vw, 1.6rem);
  color: var(--gold-500);
  letter-spacing: 0.02em;
}
.page-about .about-wall__facts em {
  font-style: normal;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--mist-300);
}
.page-about .about-wall__figure {
  margin: 0;
  position: relative;
}
.page-about .about-wall__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-top: 2px solid var(--gold-500);
  background: linear-gradient(150deg, var(--ink-800), var(--ink-950));
}
.page-about .about-wall__caption {
  margin-top: 12px;
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--mist-300);
  padding-left: 14px;
  border-left: 1px solid var(--gold-500);
}

/* 页内目录 */
.page-about .about-index {
  background: var(--paper-050);
  border-bottom: 1px solid var(--about-hair);
}
.page-about .about-index__list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .about-index__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 16px 10px;
  text-decoration: none;
  color: var(--ink-900);
  border-top: 1px solid var(--about-hair);
  transition: color 0.25s var(--ease), background 0.25s var(--ease);
}
.page-about .about-index__num {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--gold-500);
}
.page-about .about-index__label {
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.06em;
}
.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  background: var(--paper-100);
  color: var(--ink-950);
}
.page-about .about-index__link:hover .about-index__num {
  color: var(--flame-500);
}

/* 通用分区 */
.page-about .about-block {
  padding: clamp(44px, 7vw, 96px) 0;
}
.page-about .about-head {
  max-width: 60ch;
  margin-bottom: clamp(26px, 4vw, 44px);
}
.page-about .about-head .eyebrow {
  margin: 0 0 14px;
  color: var(--green-600);
}
.page-about .about-head__title {
  margin: 0 0 16px;
  font-size: clamp(1.5rem, 3.6vw, 2.3rem);
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: -0.005em;
  color: var(--ink-950);
}
.page-about .about-head__lede {
  margin: 0;
  font-size: 0.98rem;
  line-height: 1.85;
  color: var(--ink-800);
  max-width: 42ch;
}

/* 年表 */
.page-about .about-block--timeline {
  background: var(--paper-050);
}
.page-about .about-timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 34px;
  list-style: none;
}
.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold-500), rgba(201, 163, 78, 0.16));
}
.page-about .about-timeline__item {
  position: relative;
  margin: 0 0 clamp(14px, 2.6vw, 24px);
}
.page-about .about-timeline__item:last-child {
  margin-bottom: 0;
}
.page-about .about-timeline__dot {
  position: absolute;
  left: -34px;
  top: 22px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--paper-050);
  border: 2px solid var(--gold-500);
}
.page-about .about-timeline__node[open] .about-timeline__dot {
  border-color: var(--flame-500);
  background: var(--flame-500);
}
.page-about .about-timeline__summary {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: baseline;
  gap: 12px;
  padding: 16px 0 12px;
  cursor: pointer;
  list-style: none;
  border-bottom: 1px solid var(--about-hair);
}
.page-about .about-timeline__summary::-webkit-details-marker {
  display: none;
}
.page-about .about-timeline__summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.05rem;
  line-height: 1;
  color: var(--flame-500);
}
.page-about .about-timeline__node[open] .about-timeline__summary::after {
  content: "−";
}
.page-about .about-timeline__summary:focus-visible {
  outline: 2px solid var(--gold-500);
  outline-offset: 3px;
}
.page-about .about-timeline__year {
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 3.4vw, 1.95rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--gold-500);
}
.page-about .about-timeline__node[open] .about-timeline__year {
  color: var(--flame-500);
}
.page-about .about-timeline__label {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--ink-950);
  letter-spacing: 0.02em;
}
.page-about .about-timeline__body {
  padding: 14px 0 8px;
  max-width: 48ch;
}
.page-about .about-timeline__body p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--ink-800);
}

/* 栏目剖面 */
.page-about .about-block--structure {
  background: var(--paper-100);
}
.page-about .about-structure__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
  align-items: start;
}
.page-about .about-structure__figure {
  margin: 0;
}
.page-about .about-structure__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-left: 2px solid var(--gold-500);
  border-bottom: 1px solid var(--about-gold-soft);
  background: linear-gradient(160deg, var(--ink-800), var(--ink-950));
}
.page-about .about-structure__caption {
  margin-top: 12px;
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--green-600);
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}
.page-about .about-head--left {
  max-width: 46ch;
}
.page-about .about-tiers {
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .about-tier {
  display: grid;
  grid-template-columns: 3.6rem minmax(0, 1fr);
  gap: 4px 16px;
  padding: 18px 0 18px 0;
  border-top: 1px solid rgba(10, 15, 13, 0.16);
  transition: background 0.3s var(--ease), padding-left 0.3s var(--ease);
}
.page-about .about-tier:last-child {
  border-bottom: 1px solid rgba(10, 15, 13, 0.16);
}
.page-about .about-tier:hover {
  background: var(--paper-050);
  padding-left: 12px;
}
.page-about .about-tier__num {
  font-family: var(--font-mono);
  font-size: 1.75rem;
  line-height: 1;
  font-weight: 700;
  color: var(--green-600);
}
.page-about .about-tier:hover .about-tier__num {
  color: var(--flame-500);
}
.page-about .about-tier__name {
  margin: 0 0 6px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--ink-950);
}
.page-about .about-tier__body p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--ink-800);
}
.page-about .about-sports {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}
.page-about .about-sports .tag {
  padding: 5px 12px;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  border: 1px solid rgba(27, 74, 62, 0.35);
  color: var(--ink-900);
  background: transparent;
}

/* 编辑方法 */
.page-about .about-block--editors {
  background: var(--paper-050);
}
.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin-bottom: clamp(30px, 5vw, 52px);
  border-top: 1px solid var(--about-hair);
}
.page-about .about-team__item {
  padding: 20px 0;
  border-bottom: 1px solid var(--about-hair);
}
.page-about .about-team__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(2.1rem, 5.4vw, 2.9rem);
  line-height: 1;
  color: var(--gold-500);
  letter-spacing: -0.02em;
}
.page-about .about-team__label {
  display: block;
  margin: 10px 0 8px;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--ink-950);
  letter-spacing: 0.04em;
}
.page-about .about-team__item p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--ink-800);
  max-width: 32ch;
}
.page-about .about-flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: flow;
}
.page-about .about-flow__step {
  position: relative;
  padding: 20px 18px 22px;
  background: var(--ink-950);
  color: var(--paper-050);
  border-left: 2px solid var(--gold-500);
}
.page-about .about-flow__step:nth-child(2) {
  background: var(--ink-900);
}
.page-about .about-flow__step:nth-child(3) {
  background: var(--green-600);
}
.page-about .about-flow__num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  color: var(--gold-300);
}
.page-about .about-flow__name {
  margin: 10px 0 8px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--paper-050);
}
.page-about .about-flow__step p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: rgba(244, 247, 242, 0.82);
}
.page-about .about-editors__note {
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding-left: 16px;
  border-left: 1px solid var(--gold-500);
  font-size: 0.94rem;
  line-height: 1.9;
  color: var(--green-600);
  max-width: 46ch;
}

/* 供稿生态 */
.page-about .about-block--network {
  background: var(--ink-900);
  color: var(--paper-050);
}
.page-about .about-network__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 52px);
  align-items: center;
}
.page-about .about-head--dark .eyebrow {
  color: var(--gold-300);
}
.page-about .about-head--dark .about-head__title {
  color: var(--paper-050);
}
.page-about .about-head--dark .about-head__lede {
  color: rgba(244, 247, 242, 0.82);
}
.page-about .about-lines {
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--about-hair-light);
}
.page-about .about-lines__item {
  display: grid;
  grid-template-columns: 2.2rem minmax(0, 1fr);
  gap: 10px;
  padding: 13px 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: rgba(244, 247, 242, 0.9);
  border-bottom: 1px solid var(--about-hair-light);
}
.page-about .about-lines__item .mono {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--gold-500);
  letter-spacing: 0.08em;
}
.page-about .about-network__note {
  margin: 0 0 24px;
  font-size: 0.92rem;
  line-height: 1.85;
  color: rgba(244, 247, 242, 0.78);
  max-width: 44ch;
}
.page-about .about-network__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.page-about .about-network__actions .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-decoration: none;
  border-radius: var(--radius);
  transition: transform 0.25s var(--ease), background 0.25s var(--ease), color 0.25s var(--ease);
}
.page-about .about-network__actions .btn--gold {
  background: var(--gold-500);
  color: var(--ink-950);
}
.page-about .about-network__actions .btn--gold:hover {
  background: var(--gold-300);
  transform: translateY(-2px);
}
.page-about .about-network__actions .btn--ghost {
  border: 1px solid var(--about-gold-soft);
  color: var(--paper-050);
}
.page-about .about-network__actions .btn--ghost:hover {
  border-color: var(--gold-500);
  color: var(--gold-300);
  transform: translateY(-2px);
}
.page-about .about-network__figure {
  margin: 0;
}
.page-about .about-network__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-top: 1px solid var(--gold-500);
  background: linear-gradient(150deg, var(--ink-800), var(--ink-950));
}
.page-about .about-network__caption {
  margin-top: 12px;
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--mist-300);
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}

/* 下一步 */
.page-about .about-block--next {
  background: var(--paper-050);
  padding-bottom: clamp(50px, 8vw, 104px);
}
.page-about .about-next__title {
  margin: 0 0 14px;
  font-size: clamp(1.35rem, 3.2vw, 1.9rem);
  font-weight: 900;
  color: var(--ink-950);
  letter-spacing: -0.005em;
}
.page-about .about-next__lede {
  margin: 0 0 26px;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--ink-800);
  max-width: 44ch;
}
.page-about .about-next__list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--about-hair);
}
.page-about .about-next__link {
  display: grid;
  grid-template-columns: 2.4rem minmax(0, 1fr);
  align-items: baseline;
  gap: 4px 10px;
  padding: 18px 6px;
  text-decoration: none;
  color: var(--ink-950);
  border-bottom: 1px solid var(--about-hair);
  transition: background 0.25s var(--ease), padding-left 0.25s var(--ease);
}
.page-about .about-next__link .mono {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--gold-500);
  grid-row: span 2;
}
.page-about .about-next__link strong {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.page-about .about-next__link em {
  font-style: normal;
  font-size: 0.86rem;
  color: var(--green-600);
}
.page-about .about-next__link:hover,
.page-about .about-next__link:focus-visible {
  background: var(--paper-100);
  padding-left: 14px;
}
.page-about .about-next__link:hover .mono {
  color: var(--flame-500);
}

/* 平板与桌面 */
@media (min-width: 720px) {
  .page-about .about-index__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-index__link {
    padding: 20px 16px;
  }
  .page-about .about-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    column-gap: clamp(20px, 3vw, 40px);
  }
  .page-about .about-team__item {
    border-bottom: none;
    padding: 24px 0 8px;
  }
  .page-about .about-news .about-flow,
  .page-about .about-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
  }
  .page-about .about-flow__step {
    padding: 24px 20px 26px;
  }
  .page-about .about-next__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(18px, 3vw, 36px);
  }
}

@media (min-width: 900px) {
  .page-about .about-wall__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }
  .page-about .about-structure__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(32px, 5vw, 64px);
  }
  .page-about .about-network__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
  .page-about .about-network__figure {
    order: 2;
  }

  .page-about .about-timeline {
    padding-left: 0;
  }
  .page-about .about-timeline::before {
    left: 50%;
    background: linear-gradient(180deg, var(--gold-500), rgba(201, 163, 78, 0.2));
  }
  .page-about .about-timeline__item {
    margin-bottom: clamp(10px, 1.4vw, 18px);
  }
  .page-about .about-timeline__item:nth-child(odd) {
    padding-right: calc(50% + 42px);
    text-align: right;
  }
  .page-about .about-timeline__item:nth-child(even) {
    padding-left: calc(50% + 42px);
  }
  .page-about .about-timeline__dot {
    left: 50%;
    margin-left: -7px;
    top: 24px;
  }
  .page-about .about-timeline__summary {
    grid-template-columns: auto 1fr auto;
  }
  .page-about .about-timeline__item:nth-child(odd) .about-timeline__summary {
    grid-template-columns: auto auto 1fr;
  }
  .page-about .about-timeline__item:nth-child(odd) .about-timeline__summary::after {
    order: -1;
    margin-right: 8px;
  }
  .page-about .about-timeline__body {
    margin-left: auto;
  }
  .page-about .about-timeline__item:nth-child(even) .about-timeline__body {
    margin-left: 0;
  }
}

@media (min-width: 1080px) {
  .page-about .about-wall {
    padding-bottom: clamp(60px, 7vw, 92px);
  }
  .page-about .about-head__title {
    max-width: 24ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__link,
  .page-about .about-tier,
  .page-about .about-next__link,
  .page-about .about-network__actions .btn,
  .page-about .about-crumb .breadcrumb__link {
    transition: none;
  }
  .page-about .about-network__actions .btn:hover,
  .page-about .about-tier:hover,
  .page-about .about-next__link:hover {
    transform: none;
  }
}