.page-about {
  --ov-gap: clamp(20px, 3vw, 34px);
  --ov-sec-gap: clamp(44px, 6vw, 76px);
  display: block;
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-about .crumb {
  margin-bottom: clamp(18px, 2.4vw, 28px);
}

/* ---------- 首屏 ---------- */
.page-about .ov-hero {
  display: grid;
  gap: clamp(22px, 3vw, 38px);
  align-items: center;
  padding-bottom: clamp(28px, 4vw, 46px);
  border-bottom: 1px solid var(--line);
}

.page-about .ov-hero__main {
  min-width: 0;
}

.page-about .ov-hero h1 {
  font-family: var(--font-head);
  font-weight: 900;
  letter-spacing: -0.005em;
  font-size: clamp(28px, 4.4vw, 46px);
  line-height: 1.22;
  margin: 10px 0 0;
  color: var(--paper);
  text-shadow: 0 1px 0 rgba(11, 11, 15, 0.9), 0 0 22px rgba(201, 162, 39, 0.14);
}

.page-about .ov-hero__lede {
  margin: 16px 0 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--paper);
  opacity: 0.84;
}

.page-about .ov-hero__facts {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 18px;
}

.page-about .ov-hero__facts li {
  border-top: 1px solid var(--line);
  padding-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.page-about .ov-hero__num {
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.1;
  color: var(--gold);
  letter-spacing: 0.02em;
}

.page-about .ov-hero__label {
  font-size: 13px;
  color: var(--cold);
  letter-spacing: 0.02em;
}

.page-about .ov-hero__figure {
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
}

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

/* ---------- 主体两栏 ---------- */
.page-about .ov-body {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
  margin-top: clamp(32px, 4.5vw, 56px);
}

.page-about .ov-index {
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--cabinet);
  padding: 16px 18px;
}

.page-about .ov-index__title {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cold);
  text-transform: uppercase;
}

.page-about .ov-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .ov-index__list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 8px 8px 10px;
  border-left: 2px solid transparent;
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  color: var(--paper);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.5;
  transition: border-color var(--tfast) ease, background-color var(--tfast) ease, color var(--tfast) ease;
}

.page-about .ov-index__list a .mono {
  color: var(--gold);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.page-about .ov-index__list a:hover,
.page-about .ov-index__list a:focus-visible {
  border-left-color: var(--gold-hi);
  background: rgba(201, 162, 39, 0.08);
  color: var(--gold-hi);
}

.page-about .ov-flow {
  min-width: 0;
  display: grid;
  gap: var(--ov-sec-gap);
}

.page-about .ov-sec {
  min-width: 0;
  scroll-margin-top: 96px;
}

.page-about .sec-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 18px;
}

.page-about .sec-head__num {
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--cinnabar);
}

.page-about .sec-head h2 {
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: -0.005em;
  font-size: clamp(22px, 2.6vw, 31px);
  line-height: 1.3;
  margin: 0;
  color: var(--paper);
}

.page-about .ov-p {
  margin: 0 0 16px;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--paper);
  opacity: 0.88;
}

.page-about .ov-p--tight {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.7;
  opacity: 0.74;
}

.page-about .ov-sidenote {
  margin: 22px 0 0;
  padding: 14px 0 14px 18px;
  border-left: 2px solid var(--jade);
  background: linear-gradient(90deg, rgba(47, 127, 118, 0.14), rgba(47, 127, 118, 0));
}

.page-about .ov-sidenote__code {
  margin: 0 0 6px;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--jade);
}

.page-about .ov-sidenote__text {
  margin: 0;
  max-width: 32em;
  font-size: 14px;
  line-height: 1.8;
  color: var(--cold);
}

.page-about .note {
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--cold);
}

/* ---------- 赛季刻度条 ---------- */
.page-about .season-scale {
  list-style: none;
  margin: 24px 0 22px;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 14px;
}

.page-about .season-scale__item {
  display: grid;
  gap: 6px;
  min-width: 0;
}

.page-about .season-scale__no {
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--cold);
}

.page-about .season-scale__track {
  display: block;
  height: 10px;
  border-radius: 999px;
  background: var(--cabinet);
  border: 1px solid var(--line);
  overflow: hidden;
}

.page-about .season-scale__fill {
  display: block;
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(201, 162, 39, 0.45), var(--gold));
  transition: width var(--tmid) ease;
}

.page-about .season-scale__val {
  font-size: 13px;
  color: var(--paper);
  opacity: 0.8;
  letter-spacing: 0.02em;
}

.page-about .season-scale__item:nth-child(1) .season-scale__fill { width: 69%; }
.page-about .season-scale__item:nth-child(2) .season-scale__fill { width: 80%; }
.page-about .season-scale__item:nth-child(3) .season-scale__fill { width: 84%; }
.page-about .season-scale__item:nth-child(4) .season-scale__fill { width: 88%; }
.page-about .season-scale__item:nth-child(5) .season-scale__fill { width: 94%; }
.page-about .season-scale__item:nth-child(6) .season-scale__fill { width: 100%; }

.page-about .season-scale__item.is-current .season-scale__fill {
  background: linear-gradient(90deg, var(--gold), var(--gold-hi));
}

.page-about .season-scale__item.is-current .season-scale__no {
  color: var(--gold-hi);
}

.page-about .ov-figure {
  margin: 22px 0;
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .ov-caption {
  caption-side: top;
  text-align: left;
  font-size: 13px;
  color: var(--cold);
  padding-bottom: 10px;
}

.page-about .tbl-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--card);
}

.page-about .tbl {
  width: 100%;
  min-width: 460px;
  border-collapse: collapse;
  font-size: 15px;
}

.page-about .tbl th,
.page-about .tbl td {
  padding: 11px 14px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}

.page-about .tbl thead th {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cold);
  font-weight: 600;
}

.page-about .tbl tbody th {
  color: var(--gold);
  font-weight: 600;
}

.page-about .tbl tbody td.num {
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-about .tbl tbody tr:last-child th,
.page-about .tbl tbody tr:last-child td {
  border-bottom: 0;
}

/* ---------- 厂商面板 ---------- */
.page-about .vendor-panel {
  margin: 22px 0 0;
  padding: clamp(18px, 2.6vw, 26px);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background:
    linear-gradient(rgba(201, 162, 39, 0.05), rgba(201, 162, 39, 0)) ,
    var(--cabinet);
}

.page-about .vendor-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.page-about .vendor-grid__cell {
  aspect-ratio: 1 / 1;
  border-radius: var(--r-sm);
  border: 1px solid var(--line);
  background: var(--card);
}

.page-about .vendor-grid__cell.is-s2 { background: rgba(201, 162, 39, 0.18); border-color: rgba(201, 162, 39, 0.4); }
.page-about .vendor-grid__cell.is-s3 { background: rgba(201, 162, 39, 0.32); border-color: rgba(201, 162, 39, 0.55); }
.page-about .vendor-grid__cell.is-s4 { background: rgba(201, 162, 39, 0.5); border-color: rgba(201, 162, 39, 0.7); }
.page-about .vendor-grid__cell.is-s5 { background: rgba(47, 127, 118, 0.42); border-color: rgba(47, 127, 118, 0.7); }
.page-about .vendor-grid__cell.is-s6 { background: rgba(200, 64, 47, 0.42); border-color: rgba(200, 64, 47, 0.72); }

.page-about .vendor-legend {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  font-size: 13px;
  color: var(--cold);
}

.page-about .vendor-legend li {
  display: flex;
  align-items: center;
  gap: 6px;
}

.page-about .vendor-legend li .mono {
  color: var(--paper);
  opacity: 0.85;
}

.page-about .vendor-legend__dot {
  width: 10px;
  height: 10px;
  border-radius: 3px;
  border: 1px solid var(--line);
}

.page-about .vendor-legend__dot.is-s2 { background: rgba(201, 162, 39, 0.18); }
.page-about .vendor-legend__dot.is-s3 { background: rgba(201, 162, 39, 0.32); }
.page-about .vendor-legend__dot.is-s4 { background: rgba(201, 162, 39, 0.5); }
.page-about .vendor-legend__dot.is-s5 { background: rgba(47, 127, 118, 0.42); }
.page-about .vendor-legend__dot.is-s6 { background: rgba(200, 64, 47, 0.42); }

/* ---------- 四步流程 ---------- */
.page-about .flow {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .flow__step {
  position: relative;
  padding: 18px 18px 16px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold);
  border-radius: var(--r-md);
  background: var(--card);
}

.page-about .flow__no {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cinnabar);
}

.page-about .flow__name {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 19px;
  line-height: 1.4;
  margin: 6px 0 8px;
  color: var(--paper);
}

.page-about .flow__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper);
  opacity: 0.8;
}

.page-about .flow__out {
  margin: 12px 0 0;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--jade);
}

/* ---------- 小组分工 ---------- */
.page-about .crew-grid {
  margin: 22px 0 24px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .crew-grid .card {
  padding: 16px 18px;
  border-radius: var(--r-md);
  background: var(--card);
  border: 1px solid var(--line);
}

.page-about .crew-grid .datum__num {
  margin: 0;
  font-size: clamp(30px, 4.2vw, 40px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--gold);
}

.page-about .crew-grid .card--jade .datum__num { color: var(--jade); }
.page-about .crew-grid .card--ruby .datum__num { color: var(--cinnabar); }

.page-about .crew-grid .datum__label {
  margin: 8px 0 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--paper);
  letter-spacing: 0.02em;
}

/* ---------- 折叠记录 ---------- */
.page-about .acc {
  margin: 20px 0 0;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--card);
}

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

.page-about .acc__trigger {
  display: flex;
  align-items: baseline;
  gap: 12px;
  width: 100%;
  padding: 14px 16px;
  border: 0;
  background: transparent;
  color: var(--paper);
  font-family: inherit;
  font-size: 15px;
  line-height: 1.6;
  text-align: left;
  cursor: pointer;
  transition: background-color var(--tfast) ease, color var(--tfast) ease;
}

.page-about .acc__trigger:hover,
.page-about .acc__trigger:focus-visible {
  background: rgba(201, 162, 39, 0.08);
  color: var(--gold-hi);
}

.page-about .acc__code {
  flex: 0 0 auto;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.page-about .acc__panel {
  padding: 0 16px 16px 52px;
}

.page-about .acc__panel p {
  margin: 0;
  max-width: 34em;
  font-size: 14px;
  line-height: 1.85;
  color: var(--cold);
}

/* ---------- 延伸查阅 ---------- */
.page-about .ov-next {
  margin-top: clamp(10px, 2vw, 20px);
  padding: clamp(20px, 3vw, 28px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background:
    linear-gradient(135deg, rgba(201, 162, 39, 0.08), rgba(47, 127, 118, 0.06)),
    var(--cabinet);
}

.page-about .ov-next__title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(20px, 2.4vw, 26px);
  margin: 0;
  color: var(--paper);
}

.page-about .ov-next__lede {
  margin: 10px 0 18px;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--cold);
}

.page-about .ov-next__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .ov-next__list a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: var(--card);
  color: var(--paper);
  text-decoration: none;
  font-size: 15px;
  line-height: 1.6;
  transition: border-color var(--tfast) ease, color var(--tfast) ease, transform var(--tfast) ease;
}

.page-about .ov-next__list a .mono {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--jade);
}

.page-about .ov-next__list a:hover,
.page-about .ov-next__list a:focus-visible {
  border-color: var(--gold);
  color: var(--gold-hi);
  transform: translateX(2px);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .ov-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .season-scale {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .crew-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .vendor-grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

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

@media (min-width: 960px) {
  .page-about .ov-hero {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }

  .page-about .season-scale {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-about .flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .flow__step::after {
    content: "";
    position: absolute;
    top: 34px;
    right: -14px;
    width: 14px;
    height: 1px;
    background: var(--line);
  }

  .page-about .flow__step:last-child::after {
    display: none;
  }
}

@media (min-width: 1040px) {
  .page-about .ov-body {
    grid-template-columns: 236px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .ov-index {
    position: sticky;
    top: 92px;
    align-self: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ov-index__list a,
  .page-about .season-scale__fill,
  .page-about .acc__trigger,
  .page-about .ov-next__list a {
    transition: none;
  }
}