/* ===== 页面：品牌自述 /who-we-are/ ===== */
.page-about {
  --about-rail: 186px;
  position: relative;
  background: var(--paper);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-h) + 44px) 0 58px;
  border-bottom: var(--stroke) solid var(--ink);
  background:
    radial-gradient(circle at 90% -10%, rgba(201, 146, 42, 0.24), transparent 48%),
    radial-gradient(circle at 2% 96%, rgba(22, 101, 90, 0.14), transparent 46%),
    var(--paper);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.07;
  background-image: radial-gradient(var(--ink) 1px, transparent 1px);
  background-size: 20px 20px;
}

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

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  margin-top: 26px;
}

.page-about .about-title {
  margin: 10px 0 0;
  max-width: 15em;
}

.page-about .about-hero .lede {
  margin-top: 18px;
  max-width: 60ch;
}

/* 首屏口径卡 */
.page-about .hero-index {
  display: grid;
  gap: 14px;
  padding: 22px 22px 20px;
  border: var(--stroke) solid var(--ink);
  background: var(--gold-light);
  box-shadow: var(--sh-1);
}

.page-about .hero-stat {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 2px dashed rgba(23, 17, 15, 0.28);
}

.page-about .hero-stat:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .hero-stat-num {
  flex: 0 0 auto;
  font-family: var(--font-num);
  font-weight: 800;
  font-size: clamp(1.9rem, 5vw, 2.6rem);
  line-height: 1;
  color: var(--red);
  font-variant-numeric: tabular-nums;
}

.page-about .hero-stat-label {
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  color: var(--ink);
}

/* ---------- 主体 ---------- */
.page-about .about-body {
  position: relative;
  padding: 50px 0 78px;
}

.page-about .about-body::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.05;
  background-image: radial-gradient(var(--ink) 1px, transparent 1px);
  background-size: 22px 22px;
}

.page-about .about-layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
}

/* ---------- 左侧索引贴片 ---------- */
.page-about .idx-rail {
  padding-top: 12px;
  border-top: var(--stroke) solid var(--red);
}

.page-about .idx-title {
  margin: 0 0 10px;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--muted);
}

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

.page-about .idx-link {
  display: block;
  padding: 7px 10px;
  border: 2px solid transparent;
  color: var(--ink);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  white-space: nowrap;
  text-decoration: none;
  transition: background-color 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-about .idx-link:hover,
.page-about .idx-link:focus-visible {
  border-color: var(--ink);
  background: var(--gold-light);
}

/* ---------- 堆叠画板 ---------- */
.page-about .stack {
  display: grid;
  gap: 30px;
}

.page-about .board {
  padding: clamp(20px, 3.2vw, 34px);
  scroll-margin-top: calc(var(--header-h) + 22px);
}

.page-about .board-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 2px dashed var(--line);
}

.page-about .board-head .section-title {
  margin: 0;
}

/* ---------- 图 ---------- */
.page-about .board-fig {
  margin: 22px 0 0;
  border: var(--stroke) solid var(--ink);
  background: var(--gold-light);
  box-shadow: var(--sh-1);
  overflow: hidden;
}

.page-about .board-fig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 2 / 1;
}

.page-about .board-fig figcaption {
  padding: 9px 12px;
  border-top: 2px solid var(--ink);
  background: var(--paper);
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  line-height: 1.6;
}

/* ---------- 阶段列表 ---------- */
.page-about .stage-list {
  position: relative;
  margin: 28px 0 0;
  padding: 0 0 0 24px;
  list-style: none;
}

.page-about .stage-list::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background-image: repeating-linear-gradient(
    to bottom,
    var(--ink) 0 8px,
    transparent 8px 15px
  );
}

.page-about .stage-item {
  position: relative;
  padding-bottom: 24px;
}

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

.page-about .stage-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  width: 12px;
  height: 12px;
  border: 2px solid var(--ink);
  border-radius: 50%;
  background: var(--red);
}

.page-about .stage-item:nth-child(even)::before {
  background: var(--jade);
}

.page-about .stage-year {
  display: inline-block;
  margin-bottom: 8px;
  padding: 3px 9px;
  border: 2px solid var(--ink);
  background: var(--gold-light);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--ink);
}

.page-about .stage-name {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.12rem;
  line-height: 1.5;
  letter-spacing: -0.01em;
}

.page-about .stage-text {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--ink);
}

.page-about .stage-item details {
  margin-top: 10px;
  border-left: var(--stroke) solid var(--jade);
  padding-left: 12px;
}

.page-about .stage-item summary {
  cursor: pointer;
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  color: var(--jade);
}

.page-about .stage-item details p {
  margin: 8px 0 0;
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 团队 ---------- */
.page-about .team-rule {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  margin-top: 24px;
}

.page-about .role {
  padding-top: 14px;
  border-top: var(--stroke) solid var(--red);
}

.page-about .role--gold {
  border-top-color: var(--gold);
}

.page-about .role--jade {
  border-top-color: var(--jade);
}

.page-about .role-num {
  display: block;
  font-family: var(--font-num);
  font-weight: 800;
  font-size: clamp(2rem, 5vw, 2.8rem);
  line-height: 1;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.page-about .role-name {
  margin: 8px 0 6px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
}

.page-about .role-text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 流程 ---------- */
.page-about .flow-list {
  display: grid;
  gap: 18px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .flow-step {
  position: relative;
  min-height: 40px;
  padding-left: 54px;
}

.page-about .flow-num {
  position: absolute;
  left: 0;
  top: 0;
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 2px solid var(--ink);
  background: var(--jade);
  box-shadow: 3px 3px 0 var(--ink);
  color: var(--paper);
  font-family: var(--font-num);
  font-weight: 800;
  font-size: 0.92rem;
  font-variant-numeric: tabular-nums;
}

.page-about .flow-name {
  margin: 0 0 5px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
}

.page-about .flow-text {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.8;
  color: var(--ink);
}

/* ---------- 三条主线 ---------- */
.page-about .thread-list {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .thread {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 20px 0;
  border-bottom: 2px dashed var(--line);
}

.page-about .thread:first-child {
  border-top: 2px dashed var(--line);
}

.page-about .thread-key {
  display: inline-block;
  align-self: start;
  padding: 4px 10px;
  border: 2px solid var(--ink);
  background: var(--jade-light);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--ink);
}

.page-about .thread-text {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.8;
}

.page-about .thread-go {
  justify-self: start;
  color: var(--jade);
  font-size: 0.84rem;
  letter-spacing: 0.06em;
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}

.page-about .thread-go:hover,
.page-about .thread-go:focus-visible {
  color: var(--red);
}

/* ---------- 同步 ---------- */
.page-about .sync-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  margin-top: 24px;
}

.page-about .sync-note p {
  margin: 0 0 12px;
  font-size: 0.93rem;
  line-height: 1.8;
}

.page-about .sync-note p:last-of-type {
  margin-bottom: 14px;
}

/* ---------- 边界 ---------- */
.page-about .note-panel {
  margin-top: 22px;
}

.page-about .rule-list {
  margin-top: 22px;
}

.page-about .about-outro {
  margin: 26px 0 0;
  padding-top: 20px;
  border-top: 2px dashed var(--line);
  font-size: 0.93rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 18px;
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-about .team-rule {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }

  .page-about .thread {
    grid-template-columns: 148px minmax(0, 1fr);
    align-items: start;
    gap: 10px 24px;
  }

  .page-about .thread-key {
    grid-row: 1 / span 2;
  }

  .page-about .thread-go {
    grid-column: 2;
  }

  .page-about .sync-row {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    align-items: center;
    gap: 32px;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(280px, 0.8fr);
    align-items: end;
    gap: 46px;
  }

  .page-about .board:nth-of-type(even) {
    margin-right: 22px;
  }

  .page-about .board:nth-of-type(odd) {
    margin-left: 10px;
  }
}

@media (min-width: 1080px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: 58px;
  }

  .page-about .idx-rail {
    position: sticky;
    top: calc(var(--header-h) + 26px);
    align-self: start;
    padding: 2px 0 0 16px;
    border-top: 0;
    border-left: var(--stroke) solid var(--red);
  }

  .page-about .idx-list {
    flex-direction: column;
    gap: 2px;
    padding-bottom: 0;
    overflow: visible;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .idx-link {
    transition: none;
  }
}