.page-about {
  --about-fold: 14px;
  --about-measure: 64ch;
  display: block;
  padding-bottom: clamp(40px, 8vw, 92px);
}

/* ---------- 面包屑 ---------- */
.page-about .crumbs {
  margin-top: clamp(16px, 3vw, 30px);
}

/* ---------- 首屏 ---------- */
.page-about .about-lede {
  padding-block: clamp(18px, 3vw, 34px) clamp(24px, 4vw, 46px);
}

.page-about .about-lede-grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.page-about .about-lede .eyebrow {
  color: var(--cyan);
  margin: 0;
}

.page-about h1 {
  margin: 12px 0 20px;
  max-width: 22ch;
  font-size: clamp(30px, 5.6vw, 58px);
  line-height: 1.08;
  letter-spacing: -0.03em;
  font-weight: 900;
  color: var(--paper);
}

.page-about .about-lede-text {
  margin: 0 0 1.1em;
  max-width: 60ch;
  font-size: clamp(16px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--paper);
}

.page-about .about-lede-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(18px, 2.6vw, 28px);
}

/* 关键数据方阵 */
.page-about .about-keyfigs {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--grid);
  border: 1px solid var(--grid);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-keyfigs > div {
  background: var(--panel);
  padding: clamp(13px, 2vw, 18px);
}

.page-about .about-keyfigs dt {
  font-size: 12px;
  letter-spacing: 0.11em;
  color: var(--mist);
}

.page-about .about-keyfigs dd {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.6vw, 32px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-about .about-keyfigs > div:nth-child(2) dd {
  color: var(--orange);
}

.page-about .about-unit {
  display: block;
  margin-top: 6px;
  font-family: var(--font-sans);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: clamp(22px, 3.6vw, 38px) 0 0;
  border: 1px solid var(--grid);
  border-radius: var(--radius);
  background: var(--panel);
  overflow: hidden;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-figure figcaption {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 12px;
  padding: 12px clamp(12px, 2vw, 18px);
  border-top: 1px solid var(--grid);
  background: var(--ink);
  font-size: 13px;
  line-height: 1.6;
  letter-spacing: 0.03em;
  color: var(--mist);
}

.page-about .about-figure-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-about .about-figure--inline {
  margin: clamp(20px, 3.4vw, 34px) auto;
  width: min(100% - 2 * var(--pad), 900px);
}

/* ---------- 章节索引 ---------- */
.page-about .about-index {
  margin: clamp(24px, 4vw, 44px) 0 0;
  padding: clamp(16px, 2.6vw, 24px);
  border: 1px solid var(--grid);
  border-left: 3px solid var(--cyan);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: var(--panel);
}

.page-about .about-index-label {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  letter-spacing: 0.03em;
  color: var(--mist);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-chapter {
  padding-block: clamp(30px, 5.4vw, 62px);
}

.page-about .about-chapter-head {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 16px;
  padding: clamp(14px, 2.2vw, 20px) clamp(16px, 2.4vw, 24px);
  margin-bottom: clamp(20px, 3vw, 32px);
  border: 1px solid var(--grid);
  border-left: 3px solid var(--cyan);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: linear-gradient(180deg, rgba(47, 227, 208, 0.08), rgba(47, 227, 208, 0));
}

.page-about .about-chapter-head::after {
  content: "";
  position: absolute;
  top: -1px;
  right: -1px;
  width: var(--about-fold);
  height: var(--about-fold);
  background: var(--orange);
  clip-path: polygon(100% 0, 0 0, 100% 100%);
}

.page-about .about-chapter-num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-about .about-chapter-title {
  margin: 0;
  font-size: clamp(20px, 3.2vw, 30px);
  line-height: 1.25;
  letter-spacing: -0.01em;
  font-weight: 800;
  color: var(--paper);
}

.page-about .about-chapter--narrow .prose,
.page-about .about-chapter--narrow .about-stages {
  max-width: var(--about-measure);
}

.page-about .prose p {
  margin: 0 0 1.2em;
  font-size: clamp(15.5px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--paper);
  max-width: var(--about-measure);
}

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

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 4px 0 4px 26px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), var(--grid) 72%);
}

.page-about .about-tl-item {
  position: relative;
  padding-bottom: clamp(20px, 3vw, 32px);
}

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

.page-about .about-tl-node {
  position: absolute;
  left: -26px;
  top: 4px;
  width: 16px;
  height: 16px;
  background: var(--label);
  border: 1px solid var(--grid);
  border-radius: 2px;
  box-shadow: 0 0 0 4px var(--ink);
}

.page-about a.about-tl-node {
  display: block;
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about a.about-tl-node:hover,
.page-about a.about-tl-node:focus-visible {
  background: var(--cyan);
  border-color: var(--cyan);
  outline: none;
}

.page-about .about-tl-season {
  display: inline-block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-about .about-tl-title {
  margin: 0 0 8px;
  font-size: clamp(17px, 2.2vw, 20px);
  line-height: 1.4;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-tl-text {
  margin: 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 团队方阵 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: clamp(18px, 3vw, 28px);
}

.page-about .about-team-cell {
  border: 1px solid var(--grid);
  border-radius: var(--radius);
  background: var(--panel);
  padding: clamp(16px, 2.4vw, 22px);
  transition: border-color 0.22s var(--ease), transform 0.22s var(--ease);
}

.page-about .about-team-cell:hover,
.page-about .about-team-cell:focus-within {
  border-color: var(--cyan);
  transform: translateY(-3px);
  outline: none;
}

.page-about .about-team-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(30px, 5vw, 44px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-about .about-team-cell:nth-child(2) .about-team-num {
  color: var(--orange);
}

.page-about .about-team-cell:nth-child(3) .about-team-num {
  color: var(--green);
}

.page-about .about-team-cell:nth-child(4) .about-team-num {
  color: var(--amber);
}

.page-about .about-team-unit {
  margin-left: 5px;
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-about .about-team-name {
  margin: 14px 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-team-desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-team-hint {
  margin: 12px 0 0;
  padding-left: 10px;
  border-left: 2px solid var(--cyan);
  font-size: 13px;
  line-height: 1.7;
  color: var(--cyan);
}

@media (hover: hover) and (min-width: 720px) {
  .page-about .about-team-hint {
    max-height: 0;
    margin-top: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height 0.3s var(--ease), opacity 0.3s var(--ease), margin-top 0.3s var(--ease);
  }

  .page-about .about-team-cell:hover .about-team-hint,
  .page-about .about-team-cell:focus-within .about-team-hint {
    max-height: 8em;
    margin-top: 12px;
    opacity: 1;
  }
}

/* ---------- 数据注释牌 ---------- */
.page-about .about-note {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 14px clamp(14px, 2.2vw, 20px);
  border: 1px dashed var(--grid);
  border-left: 3px solid var(--amber);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: rgba(232, 226, 212, 0.04);
}

.page-about .about-note-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.13em;
  color: var(--amber);
}

.page-about .about-note-text {
  margin: 0;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 赛季阶段标签页 ---------- */
.page-about .about-stages {
  margin-top: clamp(18px, 3vw, 26px);
}

.page-about .about-stages .tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: clamp(16px, 2.6vw, 24px);
}

.page-about .about-stages .tab {
  appearance: none;
  border: 1px solid var(--grid);
  border-radius: 999px;
  background: transparent;
  color: var(--mist);
  font-family: inherit;
  font-size: 14px;
  letter-spacing: 0.05em;
  padding: 9px 18px;
  cursor: pointer;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .about-stages .tab:hover {
  color: var(--paper);
  border-color: var(--cyan);
}

.page-about .about-stages .tab[aria-selected="true"] {
  color: var(--cyan);
  border-color: var(--cyan);
  background: rgba(47, 227, 208, 0.12);
}

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

.page-about .about-stage-panel {
  padding: clamp(16px, 2.6vw, 26px);
  border: 1px solid var(--grid);
  border-left: 3px solid var(--cyan);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: var(--panel);
}

.page-about .about-stage-panel h3 {
  margin: 0 0 10px;
  font-size: clamp(16px, 2vw, 18px);
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-stage-panel p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--mist);
}

.page-about .about-stage-list {
  margin: 14px 0 0;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-stage-list li {
  margin-bottom: 4px;
}

/* ---------- 引用 ---------- */
.page-about .about-quote {
  margin: clamp(22px, 3.4vw, 34px) 0;
  padding: 2px 0 2px clamp(14px, 2.2vw, 22px);
  border-left: 3px solid var(--cyan);
}

.page-about .about-quote p {
  margin: 0;
  max-width: 34ch;
  font-size: clamp(17px, 2.3vw, 23px);
  line-height: 1.6;
  font-weight: 700;
  letter-spacing: -0.005em;
  color: var(--paper);
}

/* ---------- 场馆章节 ---------- */
.page-about .about-venue-grid {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
}

.page-about .about-venue-cta {
  margin-top: clamp(14px, 2vw, 20px) !important;
}

.page-about .about-figure--side {
  margin: 0;
}

/* ---------- 下一步 ---------- */
.page-about .about-next {
  margin-top: clamp(34px, 5vw, 62px);
  padding: clamp(20px, 3.4vw, 34px);
  border: 1px solid var(--grid);
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(47, 227, 208, 0.11), rgba(255, 107, 44, 0.1));
}

.page-about .about-next h2 {
  margin: 0 0 10px;
  font-size: clamp(20px, 2.8vw, 26px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  font-weight: 800;
  color: var(--paper);
}

.page-about .about-next p {
  margin: 0 0 18px;
  max-width: 58ch;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--paper);
}

.page-about .about-next-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-about .about-team {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }
}

@media (min-width: 940px) {
  .page-about .about-lede-grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: end;
  }

  .page-about .about-venue-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-index {
    padding: clamp(20px, 3vw, 28px);
  }
}