.page-about {
  --about-rail-w: 220px;
  --about-cut: 14px;
  --about-plate-cut: 24px;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  padding-block: 20px 4px;
  font-size: 14px;
  color: var(--muted);
}

.page-about .breadcrumb a {
  color: var(--muted);
  text-decoration: none;
}

.page-about .breadcrumb a:hover {
  color: var(--accent-warm);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 44px 0 48px;
  background:
    radial-gradient(120% 90% at 18% 0%, rgba(255, 90, 54, 0.16), transparent 62%),
    linear-gradient(180deg, var(--bg-night) 0%, var(--bg-deep) 100%);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(30, 42, 68, 0.4) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 42, 68, 0.4) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.75), transparent 78%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.75), transparent 78%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .eyebrow {
  display: inline-block;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  background: rgba(18, 50, 74, 0.5);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.page-about .about-hero__title {
  margin: 20px 0 0;
  max-width: 20ch;
  font-size: 30px;
  line-height: 1.24;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-about .about-hero__lede {
  margin-top: 18px;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 32px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-hero__stats .stat {
  padding: 16px 18px;
  background: rgba(14, 26, 51, 0.92);
}

.page-about .about-hero__stats .stat__num {
  display: block;
  font-family: var(--mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--accent);
}

.page-about .about-hero__stats .stat__label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  color: var(--muted);
}

/* ---------- 轨道 + 正文 ---------- */
.page-about .about-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  padding-block: 40px 64px;
}

.page-about .about-rail__title {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.page-about .about-rail__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  position: relative;
}

.page-about .about-node__link {
  display: block;
  padding: 8px 12px;
  border: 1px solid var(--line);
  background: rgba(14, 26, 51, 0.7);
  color: var(--muted);
  font-size: 13px;
  text-decoration: none;
  transition: color 160ms var(--ease), border-color 160ms var(--ease), background 160ms var(--ease);
}

.page-about .about-node__link:hover,
.page-about .about-node__link.is-on {
  color: var(--text);
  border-color: var(--accent);
  background: rgba(255, 90, 54, 0.14);
}

.page-about .about-rail__stamp {
  display: none;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  color: var(--muted);
}

.page-about .about-narrative {
  display: grid;
  gap: 48px;
  min-width: 0;
}

/* ---------- 章节通用 ---------- */
.page-about .about-section {
  scroll-margin-top: 92px;
}

.page-about .about-section__rev {
  margin: 0 0 10px;
  display: inline-block;
  padding: 4px 10px;
  border: 1px solid var(--accent-warm);
  color: var(--accent-warm);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.page-about .about-section__title {
  margin: 0;
  font-size: 24px;
  line-height: 1.34;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-about .about-section__intro {
  margin: 14px 0 0;
  max-width: 64ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-section__body {
  margin-top: 16px;
  max-width: 64ch;
}

.page-about .about-section__body p {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.82;
  color: var(--muted);
}

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

/* ---------- 折叠清单 ---------- */
.page-about .fold {
  margin-top: 24px;
  border-top: 1px solid var(--line);
}

.page-about .fold__item {
  border-bottom: 1px solid var(--line);
}

.page-about .fold__trigger {
  display: block;
  width: 100%;
  padding: 16px 0;
  border: 0;
  background: none;
  text-align: left;
  font-family: var(--sans);
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  cursor: pointer;
}

.page-about .fold__trigger:hover {
  color: var(--accent-warm);
}

.page-about .fold__panel {
  padding: 0 0 18px;
}

.page-about .fold__panel p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 四区面板 ---------- */
.page-about .about-zones {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: 26px;
}

.page-about .zone {
  position: relative;
  padding: 22px 22px 20px;
  --zone-color: var(--cyan);
  background: linear-gradient(158deg, rgba(18, 50, 74, 0.96), rgba(14, 26, 51, 0.96));
  border: 1px solid var(--line);
  clip-path: polygon(
    0 0,
    calc(100% - var(--about-cut)) 0,
    100% var(--about-cut),
    100% 100%,
    var(--about-cut) 100%,
    0 calc(100% - var(--about-cut))
  );
}

.page-about .zone--shots { --zone-color: var(--cyan); }
.page-about .zone--lineup { --zone-color: var(--amber); }
.page-about .zone--injuries { --zone-color: var(--rose); }
.page-about .zone--players { --zone-color: var(--accent-warm); }

.page-about .zone::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 100%;
  background: var(--zone-color);
}

.page-about .zone__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--zone-color);
}

.page-about .zone__title {
  margin: 10px 0 8px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--text);
}

.page-about .zone p:last-child {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 修订说明块 ---------- */
.page-about .about-note {
  margin-top: 24px;
  padding: 22px 22px 20px;
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  background: linear-gradient(120deg, rgba(255, 90, 54, 0.12), rgba(14, 26, 51, 0.9) 68%);
}

.page-about .about-note__title {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
}

.page-about .about-note p:last-child {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 团队岗位表 ---------- */
.page-about .about-roles {
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--line);
}

.page-about .role-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 18px 20px;
  border-bottom: 1px solid var(--line);
  background: rgba(14, 26, 51, 0.5);
}

.page-about .role-row:last-child {
  border-bottom: 0;
}

.page-about .role-row__name {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--accent-warm);
}

.page-about .role-row__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 28px 0 0;
  border: 1px solid var(--line);
  padding: 10px;
  background: rgba(14, 26, 51, 0.6);
}

.page-about .figure__frame {
  overflow: hidden;
  background: var(--bg-panel);
}

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

.page-about .figure__cap {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .about-partners {
  margin-top: 24px;
  padding: 20px 22px;
  border-top: 2px solid var(--amber);
  background: rgba(245, 182, 46, 0.08);
}

.page-about .about-partners__lead {
  margin: 0;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.82;
  color: var(--muted);
}

/* ---------- 本地运营 ---------- */
.page-about .about-local {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  margin-top: 18px;
}

.page-about .about-local__text p {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.82;
  color: var(--muted);
}

.page-about .about-local__list {
  margin: 20px 0 0;
  padding: 18px 20px;
  list-style: none;
  border: 1px solid var(--line);
  background: linear-gradient(150deg, rgba(18, 50, 74, 0.9), rgba(7, 14, 31, 0.9));
  clip-path: polygon(
    0 0,
    calc(100% - var(--about-plate-cut)) 0,
    100% var(--about-plate-cut),
    100% 100%,
    var(--about-plate-cut) 100%,
    0 calc(100% - var(--about-plate-cut))
  );
}

.page-about .about-local__list li {
  padding: 8px 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
}

.page-about .about-local__list li:last-child {
  border-bottom: 0;
}

.page-about .about-local__list .mono {
  display: inline-block;
  min-width: 76px;
  color: var(--text);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.page-about .about-local__figure {
  margin: 0;
  border: 1px solid var(--line);
  padding: 10px;
  background: rgba(14, 26, 51, 0.6);
}

/* ---------- 里程碑 ---------- */
.page-about .about-miles {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-top: 24px;
}

.page-about .mile {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 20px 20px 18px;
  border: 1px solid var(--line);
  background: linear-gradient(120deg, rgba(14, 26, 51, 0.92), rgba(18, 50, 74, 0.55));
  clip-path: polygon(
    0 0,
    calc(100% - var(--about-cut)) 0,
    100% var(--about-cut),
    100% 100%,
    var(--about-cut) 100%,
    0 calc(100% - var(--about-cut))
  );
}

.page-about .mile__rev {
  display: inline-block;
  padding: 4px 7px;
  border: 1px solid var(--accent-warm);
  color: var(--accent-warm);
  font-size: 12px;
  text-align: center;
  letter-spacing: 0.04em;
}

.page-about .mile__title {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--text);
}

.page-about .mile__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 选择理由 ---------- */
.page-about .about-reasons {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .reason {
  padding-top: 16px;
  border-top: 2px solid var(--accent);
}

.page-about .reason--accent { border-top-color: var(--accent); }
.page-about .reason--cyan { border-top-color: var(--cyan); }
.page-about .reason--amber { border-top-color: var(--amber); }
.page-about .reason--green { border-top-color: var(--green); }

.page-about .reason__num {
  display: block;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.page-about .reason__title {
  margin: 10px 0 8px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--text);
}

.page-about .reason p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  padding: 28px 24px;
  border: 1px solid var(--line);
  background:
    radial-gradient(90% 120% at 100% 0%, rgba(255, 90, 54, 0.18), transparent 62%),
    linear-gradient(140deg, var(--bg-panel), var(--bg-deep) 72%);
  clip-path: polygon(
    0 0,
    calc(100% - var(--about-plate-cut)) 0,
    100% var(--about-plate-cut),
    100% 100%,
    var(--about-plate-cut) 100%,
    0 calc(100% - var(--about-plate-cut))
  );
}

.page-about .about-cta__title {
  margin: 0 0 10px;
  font-size: 22px;
  font-weight: 800;
  line-height: 1.4;
  color: var(--text);
}

.page-about .about-cta__text p {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero {
    padding: 64px 0 60px;
  }

  .page-about .about-hero__title {
    font-size: 40px;
    max-width: 24ch;
  }

  .page-about .about-hero__lede {
    font-size: 17px;
  }

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

  .page-about .about-hero__stats .stat {
    padding: 20px 22px;
  }

  .page-about .about-hero__stats .stat__num {
    font-size: 30px;
  }

  .page-about .about-section__title {
    font-size: 30px;
  }

  .page-about .about-zones {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .role-row {
    grid-template-columns: 180px minmax(0, 1fr);
    gap: 24px;
    align-items: baseline;
  }

  .page-about .about-local {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 28px;
    align-items: start;
  }

  .page-about .mile {
    grid-template-columns: 88px minmax(0, 1fr);
    gap: 22px;
    padding: 22px 24px 20px;
  }

  .page-about .about-reasons {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px 32px;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    padding: 34px 32px;
  }
}

/* ---------- 桌面：左侧纵向刻度轨道 ---------- */
@media (min-width: 960px) {
  .page-about .breadcrumb {
    padding-block: 24px 6px;
  }

  .page-about .about-shell {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: 52px;
    padding-block: 52px 84px;
  }

  .page-about .about-rail {
    position: sticky;
    top: 96px;
    align-self: start;
  }

  .page-about .about-rail__list {
    display: block;
    padding-left: 2px;
  }

  .page-about .about-rail__list::before {
    content: "";
    position: absolute;
    left: 7px;
    top: 10px;
    bottom: 10px;
    width: 1px;
    background: linear-gradient(180deg, var(--accent) 0%, var(--line) 34%, var(--line) 100%);
  }

  .page-about .about-node {
    position: relative;
    padding: 0 0 14px 26px;
  }

  .page-about .about-node::before {
    content: "";
    position: absolute;
    left: 0;
    top: 10px;
    width: 15px;
    height: 15px;
    background: var(--bg-night);
    border: 1px solid var(--line);
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - 4px), calc(100% - 4px) 100%, 0 100%);
    transition: border-color 160ms var(--ease), background 160ms var(--ease);
  }

  .page-about .about-node__link {
    padding: 4px 0;
    border: 0;
    background: none;
    font-size: 14px;
    line-height: 1.6;
  }

  .page-about .about-node__link:hover,
  .page-about .about-node__link.is-on {
    background: none;
    border-color: transparent;
    color: var(--accent-warm);
  }

  .page-about .about-node:hover::before,
  .page-about .about-node:focus-within::before {
    border-color: var(--accent);
  }

  .page-about .about-rail__title {
    font-size: 11px;
    letter-spacing: 0.14em;
  }

  .page-about .about-rail__stamp {
    display: block;
  }

  .page-about .about-narrative {
    gap: 72px;
  }

  .page-about .about-section__title {
    font-size: 32px;
    max-width: 26ch;
  }

  .page-about .about-section__body p,
  .page-about .about-section__intro {
    font-size: 17px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-node__link,
  .page-about .about-node::before {
    transition: none;
  }
}