.page-about {
  --about-line: rgba(201, 162, 39, 0.26);
  --about-line-soft: rgba(30, 74, 60, 0.9);
  --about-panel: rgba(16, 56, 46, 0.72);
  --about-body: rgba(243, 237, 224, 0.78);
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  padding-top: clamp(14px, 3vw, 28px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(28px, 5vw, 56px) 0 clamp(34px, 6vw, 74px);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 50%;
  top: -34%;
  width: min(780px, 130vw);
  aspect-ratio: 1 / 1;
  transform: translateX(-50%);
  background: radial-gradient(circle, rgba(201, 162, 39, 0.14), rgba(201, 162, 39, 0) 68%);
  pointer-events: none;
}

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

.page-about .about-title {
  margin: 0.4em 0 0;
  max-width: 15em;
  font-family: var(--font-display);
  font-size: clamp(32px, 7vw, 70px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--cream);
}

.page-about .about-title .mono {
  color: var(--gold);
  font-size: 0.88em;
}

.page-about .about-lede {
  max-width: var(--read);
  margin: clamp(16px, 2.6vw, 26px) 0 0;
  font-size: clamp(16px, 1.9vw, 18px);
  line-height: 1.85;
  color: var(--about-body);
}

.page-about .about-meta {
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--about-line-soft);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  line-height: 1.7;
  color: var(--sand);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-chapter {
  position: relative;
  padding: clamp(42px, 7vw, 86px) 0;
}

.page-about .about-chapter + .about-chapter {
  border-top: 1px solid var(--about-line-soft);
}

.page-about .about-chapter:last-of-type {
  padding-bottom: clamp(58px, 8vw, 108px);
}

.page-about .chapter-head {
  max-width: var(--read);
}

.page-about .chapter-title {
  font-size: clamp(26px, 4.2vw, 42px);
}

/* ---------- 正文内链接 ---------- */
.page-about .about-link {
  color: var(--gold);
  text-decoration: underline;
  text-decoration-color: rgba(201, 162, 39, 0.42);
  text-underline-offset: 3px;
  transition: color 0.2s var(--ease), text-decoration-color 0.2s var(--ease);
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--gold-hi);
  text-decoration-color: var(--gold-hi);
}

/* ---------- 图片与说明 ---------- */
.page-about .media {
  margin: 0;
}

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

.page-about .media-caption {
  display: block;
  padding: 12px 2px 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--sand);
}

.page-about .about-shot {
  max-width: 920px;
  margin: clamp(24px, 4vw, 42px) auto 0 0;
}

.page-about .about-shot img {
  aspect-ratio: 3 / 2;
  clip-path: polygon(
    var(--cut) 0,
    100% 0,
    100% calc(100% - var(--cut)),
    calc(100% - var(--cut)) 100%,
    0 100%,
    0 var(--cut)
  );
}

/* ---------- 时间线 ---------- */
.page-about .tl-wrap {
  margin-top: clamp(34px, 5vw, 62px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.page-about .tl-jump {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: none;
}

.page-about .tl-jump::-webkit-scrollbar {
  display: none;
}

.page-about .tl-jump-link {
  flex: 0 0 auto;
  padding: 7px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--sand);
  text-decoration: none;
  border: 1px solid var(--about-line-soft);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .tl-jump-link:hover,
.page-about .tl-jump-link:focus-visible {
  color: var(--gold-hi);
  border-color: var(--gold);
}

.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(26px, 4vw, 46px);
}

.page-about .tl-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
}

.page-about .tl-year {
  padding-top: 2px;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: clamp(22px, 5vw, 32px);
  line-height: 1;
  letter-spacing: 0.06em;
  color: var(--sand);
  transition: color 0.3s var(--ease);
}

.page-about .tl-year--text {
  font-size: clamp(15px, 3vw, 18px);
  letter-spacing: 0.1em;
}

.page-about .tl-body {
  position: relative;
  padding-left: 20px;
  border-left: 1px solid var(--about-line-soft);
}

.page-about .tl-body::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 9px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--night);
  border: 1px solid var(--edge);
  transition: background 0.3s var(--ease), border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.page-about .tl-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(18px, 2.5vw, 22px);
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--cream);
}

.page-about .tl-text {
  max-width: var(--read);
  margin: 10px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--about-body);
}

.page-about .tl-item.is-active .tl-year {
  color: var(--gold-hi);
}

.page-about .tl-item.is-active .tl-body::before {
  background: var(--gold);
  border-color: var(--gold-hi);
  box-shadow: 0 0 0 4px rgba(201, 162, 39, 0.16);
}

/* ---------- 规矩区 ---------- */
.page-about .rules-layout {
  margin-top: clamp(28px, 4vw, 46px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 38px);
}

.page-about .rules-aside {
  display: grid;
  gap: 18px;
  align-content: start;
}

.page-about .rules-aside .media img {
  aspect-ratio: 4 / 3;
  clip-path: polygon(
    0 0,
    calc(100% - var(--cut)) 0,
    100% var(--cut),
    100% 100%,
    0 100%
  );
}

.page-about .rules-quote {
  margin: 0;
  padding: 20px 22px 22px;
  background: var(--about-panel);
  border-left: 3px solid var(--gold);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
}

.page-about .rules-quote p {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(19px, 2.7vw, 24px);
  line-height: 1.5;
  letter-spacing: -0.01em;
  color: var(--cream);
}

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

.page-about .rule-card {
  padding: 22px 22px 20px;
  background: linear-gradient(160deg, rgba(16, 56, 46, 0.9), rgba(6, 26, 22, 0.94));
  border: 1px solid var(--about-line-soft);
  clip-path: polygon(
    var(--cut) 0,
    100% 0,
    100% calc(100% - var(--cut)),
    calc(100% - var(--cut)) 100%,
    0 100%,
    0 var(--cut)
  );
  transition: border-color 0.24s var(--ease), transform 0.24s var(--ease);
}

.page-about .rule-card:hover,
.page-about .rule-card:focus-within {
  border-color: var(--gold);
  transform: translateY(-1px);
}

.page-about .rule-index {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-about .rule-title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(17px, 2.2vw, 20px);
  line-height: 1.45;
  color: var(--cream);
}

.page-about .rule-text {
  margin: 10px 0 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--about-body);
}

.page-about .rule-more {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.34s var(--ease);
}

.page-about .rule-more > p {
  overflow: hidden;
  min-height: 0;
  margin: 0;
  padding-top: 0;
  opacity: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--sand);
  transition: opacity 0.28s var(--ease), padding-top 0.34s var(--ease);
}

.page-about .rule-card:hover .rule-more,
.page-about .rule-card:focus-within .rule-more {
  grid-template-rows: 1fr;
}

.page-about .rule-card:hover .rule-more > p,
.page-about .rule-card:focus-within .rule-more > p {
  opacity: 1;
  padding-top: 12px;
}

/* ---------- 团队 ---------- */
.page-about .team-layout {
  margin-top: clamp(28px, 4vw, 46px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 42px);
}

.page-about .team-lead {
  max-width: var(--read);
  margin: 0;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--about-body);
}

.page-about .team-list {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .team-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 18px 20px 20px;
  background: var(--about-panel);
  border: 1px solid var(--about-line-soft);
  border-left: 3px solid var(--gold);
  clip-path: polygon(
    0 0,
    100% 0,
    100% calc(100% - var(--cut)),
    calc(100% - var(--cut)) 100%,
    0 100%
  );
}

.page-about .team-num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 4.4vw, 32px);
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--gold);
}

.page-about .team-item h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 17px;
  line-height: 1.4;
  color: var(--cream);
}

.page-about .team-item p {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-body);
}

.page-about .team-shot img {
  aspect-ratio: 3 / 2;
  clip-path: polygon(
    var(--cut) 0,
    100% 0,
    100% calc(100% - var(--cut)),
    calc(100% - var(--cut)) 100%,
    0 100%,
    0 var(--cut)
  );
}

/* ---------- 桌位分区 ---------- */
.page-about .zone-scroll {
  margin-top: clamp(28px, 4vw, 46px);
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(212px, 78vw);
  gap: 14px;
  overflow-x: auto;
  padding-bottom: 14px;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
}

.page-about .zone-card {
  scroll-snap-align: start;
  padding: 20px 20px 22px;
  background: linear-gradient(180deg, rgba(16, 56, 46, 0.88), rgba(6, 26, 22, 0.92));
  border: 1px solid var(--about-line-soft);
  clip-path: polygon(
    0 0,
    100% 0,
    100% calc(100% - var(--cut)),
    calc(100% - var(--cut)) 100%,
    0 100%
  );
}

.page-about .zone-name {
  display: inline-block;
  padding: 4px 9px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gold);
  border: 1px solid var(--about-line);
}

.page-about .zone-seats {
  display: block;
  margin: 18px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(26px, 5vw, 34px);
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--cream);
}

.page-about .zone-spec {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--about-line-soft);
  font-size: 14.5px;
}

.page-about .zone-spec div {
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.page-about .zone-spec div + div {
  margin-top: 8px;
}

.page-about .zone-spec dt {
  margin: 0;
  color: var(--sand);
}

.page-about .zone-spec dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--cream);
}

.page-about .zone-note {
  max-width: var(--read);
  margin: 20px 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--gold);
  font-size: 15px;
  line-height: 1.85;
  color: var(--about-body);
}

/* ---------- 数字概览 ---------- */
.page-about .stat-row {
  margin-top: clamp(28px, 4vw, 46px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .stat {
  padding: 22px 20px 24px;
  background: linear-gradient(180deg, rgba(16, 56, 46, 0.6), rgba(6, 26, 22, 0.88));
  border-top: 2px solid var(--gold);
  border-right: 1px solid var(--about-line-soft);
  border-bottom: 1px solid var(--about-line-soft);
  border-left: 1px solid var(--about-line-soft);
  clip-path: polygon(
    0 0,
    100% 0,
    100% calc(100% - var(--cut)),
    calc(100% - var(--cut)) 100%,
    0 100%
  );
}

.page-about .stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(28px, 5.4vw, 38px);
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--gold);
}

.page-about .stat-label {
  display: block;
  margin-top: 12px;
  font-family: var(--font-display);
  font-size: 16px;
  line-height: 1.4;
  color: var(--cream);
}

.page-about .stat-text {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--sand);
}

/* ---------- 收束 ---------- */
.page-about .about-next {
  margin-top: clamp(30px, 4.5vw, 52px);
  padding-top: clamp(24px, 3.5vw, 34px);
  border-top: 1px solid var(--about-line-soft);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 16px;
}

.page-about .about-next p {
  flex: 1 1 300px;
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--about-body);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .rules-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-about .zone-scroll {
    grid-auto-columns: minmax(240px, 1fr);
  }
}

@media (min-width: 900px) {
  .page-about .tl-wrap {
    grid-template-columns: 112px minmax(0, 1fr);
    gap: 36px;
  }

  .page-about .tl-jump {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    position: sticky;
    top: 104px;
    align-self: start;
    padding: 0;
    border-left: 1px solid var(--about-line-soft);
  }

  .page-about .tl-jump-link {
    margin-left: -1px;
    padding: 6px 0 6px 14px;
    border: 0;
    border-left: 2px solid transparent;
    font-size: 13px;
  }

  .page-about .tl-jump-link:hover,
  .page-about .tl-jump-link:focus-visible {
    border-left-color: var(--gold);
  }

  .page-about .tl-item {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 0 26px;
  }

  .page-about .zone-scroll {
    grid-auto-columns: minmax(0, 1fr);
  }
}

@media (min-width: 960px) {
  .page-about .rules-layout {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
  }

  .page-about .team-layout {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: center;
  }
}

@media (min-width: 1024px) {
  .page-about .stat-row {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (hover: none) {
  .page-about .rule-more {
    grid-template-rows: 1fr;
  }

  .page-about .rule-more > p {
    opacity: 1;
    padding-top: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .rule-card,
  .page-about .rule-more,
  .page-about .rule-more > p,
  .page-about .tl-year,
  .page-about .tl-body::before,
  .page-about .about-link {
    transition: none;
  }

  .page-about .rule-card:hover,
  .page-about .rule-card:focus-within {
    transform: none;
  }
}