.page-about {
  --about-chapter-pad: 22px;
  --about-chapter-radius: var(--radius-lg);
  display: block;
  max-width: 100%;
}

/* ---------- 刊头 / 首屏 ---------- */

.page-about .about-hero {
  padding-block: 24px 12px;
}

.page-about .breadcrumb {
  margin-bottom: 28px;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 28px;
  align-items: center;
}

.page-about .about-hero__lead {
  display: grid;
  gap: 18px;
  justify-items: start;
}

.page-about .about-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 8vw, 52px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 56ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--text-muted);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  width: 100%;
  margin: 6px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero__stats .stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 18px;
  border-radius: var(--radius-md);
  background: var(--ink-800);
}

.page-about .about-hero__stats .stat__value {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.page-about .about-hero__stats .stat__value.num--amber {
  color: var(--amber-gold);
}

.page-about .about-hero__stats .stat__value.num--blue {
  color: var(--neon-blue);
}

.page-about .about-hero__stats .stat__label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-muted);
}

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

.page-about .about-hero__media .media__img,
.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

/* ---------- 主体：左索引 + 右画布 ---------- */

.page-about .about-body {
  padding-block: 40px 72px;
}

.page-about .about-body__grid {
  display: grid;
  gap: 24px;
  align-items: start;
}

.page-about .about-index {
  min-width: 0;
}

.page-about .about-index__title {
  margin: 0 0 10px;
}

.page-about .about-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-about .about-index__item a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: var(--pill);
  background: var(--ink-800);
  color: var(--text-muted);
  font-size: 14px;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color 0.18s ease, color 0.18s ease, transform 0.18s ease;
}

.page-about .about-index__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--neon-purple);
}

.page-about .about-index__label {
  font-size: 14px;
}

.page-about .about-index__item a:hover {
  background: var(--panel-700);
  color: var(--text-primary);
  transform: translateY(-1px);
}

.page-about .about-index__item[data-active="true"] a {
  background: var(--panel-600);
  color: var(--text-primary);
}

.page-about .about-index__item[data-active="true"] .about-index__num {
  color: var(--amber-gold);
}

.page-about .about-canvas {
  display: grid;
  gap: 22px;
  min-width: 0;
}

/* ---------- 章节容器（用背景色阶切分，不用边框） ---------- */

.page-about .about-chapter {
  padding: var(--about-chapter-pad);
  border-radius: var(--about-chapter-radius);
  background: var(--ink-800);
  min-width: 0;
}

.page-about .about-chapter--raised {
  background: var(--panel-700);
}

.page-about .about-chapter--panel {
  background: linear-gradient(160deg, var(--panel-700) 0%, var(--ink-800) 78%);
}

.page-about .about-chapter--info {
  background: var(--ink-800);
}

.page-about .about-chapter h2 {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(23px, 5.4vw, 36px);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.page-about .about-chapter .kicker {
  margin: 12px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-muted);
}

.page-about .about-subhead {
  margin: 34px 0 0;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--neon-purple-soft);
}

.page-about .about-note {
  margin: 24px 0 0;
  padding-left: 14px;
  border-left: 3px solid var(--amber-gold);
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-muted);
}

/* ---------- 赛季编年刻度 ---------- */

.page-about .chronicle {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .chronicle__node {
  min-width: 0;
}

.page-about .chronicle__card {
  position: relative;
  height: 100%;
  padding: 20px 18px 22px;
  border-radius: var(--radius-md);
  background: var(--panel-700);
  transition: transform 0.18s ease, background-color 0.18s ease;
}

.page-about .chronicle__card::before {
  content: "";
  display: block;
  width: 30px;
  height: 3px;
  margin-bottom: 14px;
  border-radius: var(--pill);
  background: var(--line-600);
}

.page-about .chronicle__node:hover .chronicle__card,
.page-about .chronicle__node:focus-within .chronicle__card {
  transform: translateY(-2px);
  background: var(--panel-600);
}

.page-about .chronicle__node:hover .chronicle__card::before,
.page-about .chronicle__node:focus-within .chronicle__card::before {
  background: var(--neon-purple);
}

.page-about .chronicle__node--current .chronicle__card {
  background: var(--panel-600);
}

.page-about .chronicle__node--current .chronicle__card::before {
  background: var(--amber-gold);
}

.page-about .chronicle__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin: 0 0 10px;
}

.page-about .chronicle__season {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--neon-blue);
}

.page-about .chronicle__season.num--amber {
  color: var(--amber-gold);
}

.page-about .chronicle__card h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 800;
  line-height: 1.4;
  color: var(--text-primary);
}

.page-about .chronicle__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-muted);
}

.page-about .about-chart {
  margin: 26px 0 0;
}

/* ---------- 媒体 ---------- */

.page-about .media--wide {
  margin-inline: 0;
}

.page-about .media--wide img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-md);
}

.page-about .media__cap {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--text-muted);
}

/* ---------- 团队分工 ---------- */

.page-about .roles {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 26px;
}

.page-about .role {
  padding: 18px 18px 20px;
  border-radius: var(--radius-md);
  background: var(--ink-900);
  transition: transform 0.18s ease, background-color 0.18s ease;
}

.page-about .role:hover {
  transform: translateY(-2px);
  background: var(--ink-800);
}

.page-about .role__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin: 0 0 10px;
}

.page-about .role__name {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 800;
  color: var(--text-primary);
}

.page-about .role__count {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
}

.page-about .role__count.num--purple {
  color: var(--neon-purple);
}

.page-about .role__count.num--blue {
  color: var(--neon-blue);
}

.page-about .role__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--text-muted);
}

.page-about .about-flowfig {
  margin: 24px 0 0;
}

.page-about .about-flowfig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-md);
}

.page-about .about-cadence {
  margin-top: 26px;
}

.page-about .data-list {
  display: grid;
  gap: 0;
  margin: 0;
}

.page-about .data-list__row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  align-items: baseline;
  justify-content: space-between;
  padding: 12px 2px;
  border-bottom: 1px solid var(--line-600);
}

.page-about .data-list__row:first-child {
  border-top: 1px solid var(--line-600);
}

.page-about .data-list__key {
  margin: 0;
  font-size: 14px;
  color: var(--text-muted);
}

.page-about .data-list__val {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--amber-gold);
  word-break: break-word;
}

.page-about .about-contact .data-list__val {
  font-family: var(--font-body);
  color: var(--text-primary);
}

/* ---------- 记录字段定义 ---------- */

.page-about .fields {
  display: grid;
  gap: 8px;
  margin-top: 26px;
}

.page-about .field {
  border-radius: var(--radius-md);
  background: var(--panel-700);
  overflow: hidden;
}

.page-about .field__summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 6px 14px;
  padding: 15px 18px;
  cursor: pointer;
  list-style: none;
  transition: background-color 0.18s ease;
}

.page-about .field__summary::-webkit-details-marker {
  display: none;
}

.page-about .field__summary:hover {
  background: var(--panel-600);
}

.page-about .field__name {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 800;
  color: var(--text-primary);
}

.page-about .field__hint {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--neon-blue);
}

.page-about .field[open] .field__hint {
  color: var(--amber-gold);
}

.page-about .field__body {
  margin: 0;
  padding: 0 18px 18px;
  font-size: 14px;
  line-height: 1.78;
  color: var(--text-muted);
}

/* ---------- 校验流程 ---------- */

.page-about .flow {
  display: grid;
  gap: 0;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: none;
}

.page-about .flow__step {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-600);
}

.page-about .flow__step:last-child {
  border-bottom: none;
}

.page-about .flow__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: var(--pill);
  background: var(--panel-600);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--neon-purple-soft);
}

.page-about .flow__step p {
  margin: 0;
  padding-top: 3px;
  font-size: 14px;
  line-height: 1.78;
  color: var(--text-muted);
}

/* ---------- 四条内容线 ---------- */

.page-about .lanes {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 26px;
}

.page-about .lane {
  position: relative;
  padding: 20px 18px 22px;
  border-radius: var(--radius-md);
  background: var(--ink-900);
  overflow: hidden;
}

.page-about .lane::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 3px;
  background: var(--line-600);
}

.page-about .lane--season::after {
  background: var(--neon-purple);
}

.page-about .lane--record::after {
  background: var(--neon-blue);
}

.page-about .lane--room::after {
  background: var(--amber-gold);
}

.page-about .lane--rules::after {
  background: var(--signal-red);
}

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

.page-about .lane__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 800;
  line-height: 1.4;
  color: var(--text-primary);
}

.page-about .lane__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-muted);
}

/* ---------- 入口胶囊 ---------- */

.page-about .about-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

/* ---------- 断点 ---------- */

@media (min-width: 560px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

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

@media (min-width: 900px) {
  .page-about {
    --about-chapter-pad: 44px 40px;
  }

  .page-about .about-hero {
    padding-block: 36px 16px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 48px;
  }

  .page-about .about-body {
    padding-block: 56px 96px;
  }

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

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

  .page-about .role:first-child {
    grid-column: span 2;
  }

  .page-about .lanes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .about-canvas {
    gap: 28px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-body__grid {
    grid-template-columns: minmax(176px, 3fr) minmax(0, 9fr);
    gap: 44px;
  }

  .page-about .about-index {
    position: sticky;
    top: 96px;
  }

  .page-about .about-index__list {
    flex-direction: column;
    gap: 4px;
    padding-bottom: 0;
    overflow: visible;
  }

  .page-about .about-index__item a {
    width: 100%;
    justify-content: flex-start;
    background: transparent;
    border-radius: var(--radius-sm);
  }

  .page-about .about-index__item a:hover {
    background: var(--ink-800);
  }

  .page-about .about-index__item[data-active="true"] a {
    background: var(--panel-700);
  }

  .page-about .lanes {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 1280px) {
  .page-about .chronicle {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}