.page-about {
  --about-rail: 62px;
  --about-line: rgba(53, 224, 200, 0.22);
  --about-panel: rgba(20, 52, 44, 0.66);
  --about-soft: rgba(201, 211, 207, 0.72);
  --about-paper-line: rgba(27, 36, 31, 0.14);
  max-width: var(--shell-w);
  margin-inline: auto;
  padding: clamp(22px, 4vw, 48px) clamp(16px, 4vw, 40px) clamp(64px, 11vw, 128px);
  overflow-x: clip;
}

/* 面包屑 */
.page-about .about-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--about-soft);
  padding-bottom: clamp(18px, 3vw, 32px);
}
.page-about .about-crumb a {
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s var(--ease);
}
.page-about .about-crumb a:hover { border-bottom-color: var(--cyan-400); }
.page-about .about-crumb .sep { color: rgba(201, 211, 207, 0.4); }

/* 通用行：左轨道 + 内容 */
.page-about .about-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}
.page-about .about-rail { display: none; }
.page-about .about-body { min-width: 0; }

@media (min-width: 900px) {
  .page-about .about-row {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(20px, 3vw, 44px);
  }
  .page-about .about-rail {
    display: block;
    padding-top: 8px;
  }
  .page-about .about-rail-text {
    display: inline-block;
    writing-mode: vertical-rl;
    text-orientation: mixed;
    font-size: 12px;
    letter-spacing: 0.3em;
    color: rgba(201, 211, 207, 0.5);
    border-left: 1px solid var(--line-soft);
    padding-left: 14px;
    min-height: 92px;
  }
}

/* 首屏 */
.page-about .about-hero {
  padding-bottom: clamp(34px, 6vw, 72px);
  border-bottom: 1px solid var(--line-soft);
}
.page-about .about-kicker {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan-400);
  margin: 0 0 14px;
}
.page-about h1 {
  margin: 0 0 18px;
  max-width: 22ch;
  color: var(--paper-050);
}
.page-about .lead {
  max-width: 62ch;
  margin: 0 0 26px;
  font-size: 17px;
  line-height: 1.8;
  color: var(--slate-200);
}
.page-about .about-stats {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(158px, 1fr));
}
.page-about .about-stat {
  background: linear-gradient(158deg, rgba(53, 224, 200, 0.12), rgba(20, 52, 44, 0.72));
  border: 1px solid var(--about-line);
  border-radius: var(--r-md);
  padding: 18px 18px 20px;
}
.page-about .about-stat .num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(26px, 4vw, 38px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--cyan-400);
}
.page-about .about-stat .unit {
  font-size: 0.48em;
  margin-left: 4px;
  color: var(--slate-200);
}
.page-about .about-stat .label {
  display: block;
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--about-soft);
}

/* 章节 */
.page-about .about-section {
  padding: clamp(44px, 7vw, 88px) 0;
  border-bottom: 1px solid var(--line-soft);
}
.page-about .about-section:last-of-type { border-bottom: 0; }
.page-about .about-section h2 { margin: 0 0 16px; color: var(--paper-050); }
.page-about .about-section p {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--slate-200);
}
.page-about .about-cols {
  display: grid;
  gap: 16px 34px;
  margin-top: 8px;
}
@media (min-width: 820px) {
  .page-about .about-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
.page-about .about-inline-link {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px dashed var(--line-soft);
  font-size: 15px;
}
.page-about a {
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 224, 200, 0.35);
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}
.page-about a:hover {
  color: var(--amber-300);
  border-bottom-color: var(--amber-300);
}

/* 编辑部角色 */
.page-about .about-roles {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(208px, 1fr));
  margin: 22px 0 4px;
}
.page-about .about-role {
  padding: 16px 16px 14px;
  border-radius: var(--r-md);
  border: 1px solid var(--about-line);
  border-left: 3px solid var(--cyan-600);
  background: linear-gradient(90deg, rgba(53, 224, 200, 0.08), rgba(20, 52, 44, 0.4) 78%);
}
.page-about .about-role h3 {
  margin: 0 0 8px;
  font-size: 18px;
  color: var(--cyan-400);
}
.page-about .about-role p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--about-soft);
}

/* 图片 */
.page-about .about-figure {
  margin: 26px 0 0;
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid var(--line-soft);
  background: var(--ink-700);
}
.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .about-figure .media-caption {
  padding: 10px 14px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--about-soft);
  border-top: 1px solid var(--line-soft);
}
@media (min-width: 900px) {
  .page-about .about-figure--half { max-width: 640px; }
}

/* 联赛分组卡片 */
.page-about .about-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 22px 0 4px;
}
.page-about .about-league-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fill, minmax(212px, 1fr));
  margin-top: 18px;
}
.page-about .about-league {
  padding: 16px 18px 18px;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: var(--about-panel);
  transition: transform 0.18s var(--ease), border-color 0.18s var(--ease);
}
.page-about .about-league:hover {
  transform: translateY(-2px);
  border-color: var(--cyan-400);
}
.page-about .about-league-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin: 0 0 10px;
}
.page-about .about-league-code {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--cyan-400);
}
.page-about .about-league-count {
  font-size: 13px;
  font-weight: 700;
  color: var(--amber-500);
}
.page-about .about-league-desc {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--about-soft);
}
.page-about .about-league-meta {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: rgba(201, 211, 207, 0.55);
}

/* 档案字段折叠块 */
.page-about .about-fields { margin-top: 24px; }
.page-about .about-field {
  border: 1px solid var(--about-line);
  border-radius: var(--r-md);
  background: var(--about-panel);
  overflow: hidden;
}
.page-about .about-field + .about-field { margin-top: 10px; }
.page-about .about-field > summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 14px;
  padding: 15px 18px;
  cursor: pointer;
  list-style: none;
}
.page-about .about-field > summary::-webkit-details-marker { display: none; }
.page-about .about-field-key {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--amber-500);
}
.page-about .about-field-name {
  font-size: 17px;
  font-weight: 700;
  color: var(--paper-050);
}
.page-about .about-field-hint {
  flex: 1 1 190px;
  font-size: 13px;
  color: rgba(201, 211, 207, 0.7);
}
.page-about .about-field-mark {
  font-size: 16px;
  color: var(--cyan-400);
  transition: transform 0.2s var(--ease);
}
.page-about .about-field[open] .about-field-mark { transform: rotate(45deg); }
.page-about .about-field-body {
  padding: 14px 18px 18px;
  border-top: 1px dashed var(--line-soft);
}
.page-about .about-field-body p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--about-soft);
}
.page-about .about-field-sample {
  margin: 0;
  padding: 10px 12px;
  border-radius: var(--r-sm);
  background: rgba(11, 33, 28, 0.72);
  color: var(--cyan-400);
  font-size: 13px;
  letter-spacing: 0.02em;
  overflow-x: auto;
  white-space: nowrap;
}

/* 暖纸归档区块 */
.page-about .about-paper {
  background: var(--paper-050);
  border: 1px solid var(--paper-100);
  border-radius: var(--r-lg);
  padding: clamp(22px, 4vw, 46px);
  color: var(--ink-800);
}
.page-about .about-paper h2 { color: var(--ink-900); margin-bottom: 14px; }
.page-about .about-paper p {
  color: var(--ink-800);
  font-size: 16px;
  line-height: 1.8;
  margin: 0 0 14px;
  max-width: 74ch;
}
.page-about .about-paper a {
  color: var(--cyan-600);
  border-bottom-color: rgba(18, 163, 143, 0.4);
}
.page-about .about-paper a:hover { color: var(--clay-600); border-bottom-color: var(--clay-600); }
.page-about .about-version-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 20px 0 16px;
}
.page-about .about-vchip {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--amber-500);
  color: var(--ink-900);
}
.page-about .about-vchip--ghost {
  background: transparent;
  color: var(--ink-800);
  border: 1px solid var(--about-paper-line);
}
.page-about .about-version-note {
  margin: 0;
  font-size: 14.5px;
  color: var(--ink-800);
}

/* 赛季时间轴 */
.page-about .about-timeline {
  list-style: none;
  margin: 26px 0 0;
  padding: 0 0 10px;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(206px, 1fr);
  gap: 14px;
  overflow-x: auto;
  scroll-snap-type: x proximity;
}
@media (min-width: 1040px) {
  .page-about .about-timeline {
    grid-auto-columns: minmax(0, 1fr);
    overflow-x: visible;
  }
}
.page-about .about-tl {
  position: relative;
  scroll-snap-align: start;
  padding: 18px 4px 0 0;
  border-top: 2px solid var(--about-line);
}
.page-about .about-tl.is-current { border-top-color: var(--amber-500); }
.page-about .about-tl-dot {
  position: absolute;
  top: -7px;
  left: 0;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--ink-700);
  border: 2px solid var(--cyan-600);
}
.page-about .about-tl.is-current .about-tl-dot {
  background: var(--amber-500);
  border-color: var(--amber-300);
}
.page-about .about-tl-era {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan-400);
}
.page-about .about-tl.is-current .about-tl-era { color: var(--amber-500); }
.page-about .about-tl-title {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  color: var(--paper-050);
}
.page-about .about-tl-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--about-soft);
}

/* 协作与行动 */
.page-about .about-cta {
  margin-top: 24px;
  padding: 22px 22px 24px;
  border-radius: var(--r-lg);
  border: 1px solid var(--about-line);
  background: linear-gradient(140deg, rgba(53, 224, 200, 0.1), rgba(20, 52, 44, 0.7));
}
.page-about .about-cta p {
  margin: 0 0 16px;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--slate-200);
}
.page-about .about-cta .btn { text-decoration: none; }

@media (max-width: 560px) {
  .page-about .about-stats { grid-template-columns: minmax(0, 1fr); }
  .page-about .about-field-sample { white-space: normal; word-break: break-word; }
  .page-about .about-league-grid { grid-template-columns: minmax(0, 1fr); }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-league,
  .page-about .about-field-mark,
  .page-about .about-cta { transition: none; }
  .page-about .about-league:hover { transform: none; }
  .page-about .about-timeline { scroll-snap-type: none; }
}