/* ===== 看台档案 /about/ 页面专属样式 ===== */
.page-about{
  --about-line: rgba(16, 54, 42, .16);
  --about-line-soft: rgba(16, 54, 42, .08);
  --about-soft: #3D4F60;
  background: var(--stand);
  color: var(--navy);
  font-family: var(--font-body);
  line-height: 1.75;
}

.page-about a{ color: inherit; }

.page-about .about-crumb{
  padding-top: var(--s3);
  padding-bottom: var(--s1);
}

.page-about .breadcrumb__link{
  text-decoration: none;
  color: var(--about-soft);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.page-about .breadcrumb__link:hover,
.page-about .breadcrumb__link:focus-visible{
  color: var(--pitch);
  border-bottom-color: var(--whistle);
}

/* ---- 首屏框景 ---- */
.page-about .about-hero{
  position: relative;
  background: var(--pitch);
  color: var(--white);
  padding: var(--s4) 0 var(--s5);
  overflow: hidden;
}
.page-about .about-hero::after{
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 26px;
  background: var(--stand);
  clip-path: polygon(0 100%, 100% 0, 100% 100%);
}
.page-about .about-hero__stripe{
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(180deg, rgba(221, 233, 220, .07) 0 22px, transparent 22px 44px);
  pointer-events: none;
}
.page-about .about-hero__inner{
  position: relative;
  display: grid;
  gap: var(--s4);
}
.page-about .about-hero__kicker{
  margin: 0 0 var(--s2);
  font-size: 12px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--lime);
}
.page-about .about-hero__title{
  margin: 0;
  font-size: clamp(48px, 15vw, 96px);
  line-height: .98;
  letter-spacing: -.02em;
  font-weight: 900;
  color: var(--white);
}
.page-about .about-hero__lede{
  margin: var(--s3) 0 0;
  max-width: 60ch;
  font-size: 16px;
  color: rgba(243, 239, 228, .88);
}
.page-about .about-hero__actions{
  display: flex;
  flex-wrap: wrap;
  gap: var(--s2);
  margin-top: var(--s3);
}
.page-about .about-hero__note{
  display: none;
}

/* 概览板：刻度框 */
.page-about .about-board{
  position: relative;
  padding: var(--s3);
  border: 1px solid rgba(200, 242, 74, .34);
  border-radius: var(--r-card);
  background: linear-gradient(155deg, rgba(76, 138, 94, .38), rgba(22, 50, 79, .62));
}
.page-about .about-board::before{
  content: "";
  position: absolute;
  left: 14px; right: 14px; top: 10px;
  height: 9px;
  background-image: repeating-linear-gradient(90deg, rgba(200, 242, 74, .5) 0 1px, transparent 1px 16px);
  pointer-events: none;
}
.page-about .about-board__label{
  margin: var(--s2) 0 var(--s3);
  font-size: 12px;
  letter-spacing: .18em;
  color: rgba(221, 233, 220, .7);
}
.page-about .about-board__stats{
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--s3) var(--s2);
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .about-board .stat__value{
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(24px, 7vw, 32px);
  line-height: 1.05;
  font-weight: 700;
  color: var(--white);
  font-variant-numeric: tabular-nums;
}
.page-about .about-board .stat__value--hi{ color: var(--lime); }
.page-about .about-board .stat__unit{
  margin-left: 3px;
  font-size: 13px;
  font-weight: 400;
  color: rgba(221, 233, 220, .78);
}
.page-about .about-board .stat__label{
  display: block;
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: .06em;
  color: rgba(221, 233, 220, .72);
}

/* ---- 主体分区 ---- */
.page-about .about-body{
  padding-top: var(--s5);
  padding-bottom: var(--s6);
}
.page-about .about-sec{
  position: relative;
}
.page-about .about-sec__grid{
  display: grid;
  gap: var(--s3);
}
.page-about .about-sec__head{
  position: relative;
}
.page-about .chapter-num{
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(56px, 18vw, 120px);
  line-height: .78;
  font-weight: 700;
  letter-spacing: -.02em;
  color: transparent;
  -webkit-text-stroke: 1.5px rgba(76, 138, 94, .55);
  margin-bottom: var(--s1);
}
.page-about .about-sec__title{
  position: relative;
  margin: 0;
  padding-left: 16px;
  font-size: clamp(22px, 6vw, 30px);
  line-height: 1.2;
  letter-spacing: -.01em;
  font-weight: 800;
  color: var(--navy-deep);
}
.page-about .about-sec__title::before{
  content: "";
  position: absolute;
  left: 0; top: .2em; bottom: .2em;
  width: 7px;
  border-radius: 2px;
  background: var(--whistle);
  transform: skewX(-8deg);
}
.page-about .about-sec__note{
  display: block;
  margin: var(--s2) 0 0;
  writing-mode: horizontal-tb;
  color: var(--stone);
  opacity: .85;
  transition: opacity var(--dur) var(--ease), color var(--dur) var(--ease);
}
.page-about .about-sec:hover .about-sec__note,
.page-about .about-sec:focus-within .about-sec__note{
  opacity: 1;
  color: var(--clay);
}
.page-about .about-sec__content{
  min-width: 0;
}
.page-about .about-sec__lede{
  margin: 0 0 var(--s3);
  max-width: 64ch;
  font-size: 16px;
  color: var(--about-soft);
}
.page-about .about-prose p{
  margin: 0 0 var(--s3);
  max-width: 62ch;
  font-size: 16px;
  color: var(--about-soft);
}
.page-about .about-prose p:first-child{ color: var(--navy); }

/* 01 起源 */
.page-about .about-origin{
  display: grid;
  gap: var(--s4);
}
.page-about .about-origin__figure{
  margin: 0;
}

/* 02 流程 */
.page-about .about-flow{
  position: relative;
  margin: 0 0 var(--s4);
  padding: 0;
  list-style: none;
}
.page-about .about-flow__step{
  position: relative;
  padding-left: 46px;
  padding-bottom: var(--s2);
}
.page-about .about-flow__step::before{
  content: "";
  position: absolute;
  left: 13px;
  top: 30px;
  bottom: -4px;
  border-left: 2px dashed rgba(108, 122, 115, .5);
}
.page-about .about-flow__step:last-child::before{ display: none; }
.page-about .about-flow__step::after{
  content: "";
  position: absolute;
  left: 6px;
  top: 15px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--moss);
  box-shadow: 0 0 0 4px var(--stand);
}
.page-about .about-flow__fold{
  border: 1px solid var(--about-line-soft);
  border-radius: var(--r-tile);
  background: var(--white);
  overflow: hidden;
}
.page-about .about-flow__sum{
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  grid-template-areas:
    "idx name"
    "idx meta";
  gap: 2px var(--s2);
  align-items: center;
  padding: var(--s2) var(--s3) var(--s2) var(--s2);
  cursor: pointer;
  list-style: none;
}
.page-about .about-flow__sum::-webkit-details-marker{ display: none; }
.page-about .about-flow__idx{
  grid-area: idx;
  display: grid;
  place-items: center;
  width: 34px; height: 34px;
  border-radius: 10px;
  background: var(--turf);
  color: var(--pitch);
  font-size: 14px;
  font-weight: 700;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.page-about .about-flow__name{
  grid-area: name;
  font-size: 17px;
  font-weight: 800;
  color: var(--navy-deep);
}
.page-about .about-flow__role{
  grid-area: meta;
  font-size: 13px;
  color: var(--stone);
}
.page-about .about-flow__time{
  display: none;
}
.page-about .about-flow__fold[open]{
  border-color: rgba(242, 112, 31, .55);
}
.page-about .about-flow__fold[open] .about-flow__idx{
  background: var(--lime);
  color: var(--pitch);
}
.page-about .about-flow__body{
  padding: 0 var(--s3) var(--s2);
  border-left: 3px solid var(--whistle);
}
.page-about .about-flow__body p{
  margin: 0;
  font-size: 15px;
  color: var(--about-soft);
}
.page-about .about-flow__figure{
  margin: 0;
}

/* 03 口径表 */
.page-about .about-table-wrap{
  overflow-x: auto;
  border-radius: var(--r-tile);
  border: 1px solid var(--about-line-soft);
  background: var(--white);
  -webkit-overflow-scrolling: touch;
}
.page-about .about-table{
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
  font-size: 14px;
}
.page-about .about-table__caption{
  caption-side: top;
  padding: var(--s2) var(--s3);
  text-align: left;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--stone);
  background: var(--pitch);
  color: rgba(243, 239, 228, .82);
}
.page-about .about-table thead th{
  position: sticky;
  top: 0;
  z-index: 1;
  padding: var(--s2) var(--s3);
  text-align: left;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--white);
  background: var(--navy);
  border-bottom: 2px solid var(--navy-deep);
}
.page-about .about-table tbody th{
  padding: var(--s2) var(--s3);
  text-align: left;
  font-size: 14px;
  font-weight: 700;
  color: var(--navy-deep);
  white-space: nowrap;
}
.page-about .about-table tbody td{
  padding: var(--s2) var(--s3);
  color: var(--about-soft);
  border-top: 1px solid var(--about-line-soft);
  vertical-align: top;
}
.page-about .about-table tbody tr:nth-child(even){ background: var(--turf); }
.page-about .about-table tbody tr.is-current{ background: rgba(200, 242, 74, .28); }
.page-about .about-table .about-table__unit-col{
  text-align: right;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}
.page-about .about-table__note{
  margin-top: var(--s3);
  font-size: 14px;
  color: var(--about-soft);
}

/* 04 角色 */
.page-about .about-roles{
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: var(--s3);
}
.page-about .about-role{
  position: relative;
  padding: var(--s3) var(--s3) var(--s3) var(--s4);
  background: var(--white);
  border-radius: var(--r-card);
  border-left: 6px solid var(--moss);
}
.page-about .about-role__num{
  display: block;
  font-size: 30px;
  line-height: 1;
  font-weight: 700;
  color: var(--whistle);
  font-variant-numeric: tabular-nums;
}
.page-about .about-role__name{
  margin: var(--s1) 0 var(--s1);
  font-size: 18px;
  font-weight: 800;
  color: var(--navy-deep);
}
.page-about .about-role__duty{
  margin: 0;
  font-size: 15px;
  color: var(--about-soft);
}

/* 05 版本轴 */
.page-about .about-versions{
  display: flex;
  gap: var(--s2);
  margin: 0 0 var(--s4);
  padding: 0 0 var(--s3);
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}
.page-about .about-version{
  position: relative;
  flex: 0 0 210px;
  scroll-snap-align: start;
  padding: var(--s3) var(--s2) var(--s2);
  border: 1px solid var(--about-line);
  border-radius: var(--r-tile);
  background: var(--white);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.page-about .about-version:hover,
.page-about .about-version:focus-within{
  border-color: var(--whistle);
}
.page-about .about-version__dot{
  position: absolute;
  top: -7px; left: var(--s2);
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--stone);
}
.page-about .about-version__id{
  margin: 0;
  font-size: 20px;
  font-weight: 700;
  color: var(--navy-deep);
  font-variant-numeric: tabular-nums;
}
.page-about .about-version__kw{
  margin: var(--s1) 0 0;
  font-size: 14px;
  color: var(--about-soft);
  opacity: .62;
  transition: opacity var(--dur) var(--ease);
}
.page-about .about-version:hover .about-version__kw,
.page-about .about-version:focus-within .about-version__kw{
  opacity: 1;
}
.page-about .about-version--current{
  background: var(--pitch);
  border-color: var(--pitch);
}
.page-about .about-version--current .about-version__dot{
  background: var(--lime);
  box-shadow: 0 0 0 4px rgba(200, 242, 74, .28);
}
.page-about .about-version--current .about-version__id{ color: var(--lime); }
.page-about .about-version--current .about-version__kw{
  color: rgba(243, 239, 228, .9);
  opacity: 1;
}
.page-about .about-versions__figure{
  margin: 0;
}

/* 06 合规 */
.page-about .about-legal{
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--about-line);
}
.page-about .about-legal__row{
  display: grid;
  gap: 4px;
  padding: var(--s3) 0;
  border-bottom: 1px solid var(--about-line-soft);
}
.page-about .about-legal__row dt{
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--clay);
  font-weight: 700;
}
.page-about .about-legal__row dd{
  margin: 0;
  font-size: 15px;
  color: var(--about-soft);
  word-break: break-word;
}
.page-about .about-legal__note{
  margin-top: var(--s3);
  font-size: 14px;
}

/* 尾部分流 */
.page-about .about-next{
  margin-top: var(--s6);
  padding-top: var(--s4);
  border-top: 2px dashed rgba(108, 122, 115, .45);
}
.page-about .about-next__title{
  margin: 0 0 var(--s3);
  font-size: clamp(22px, 6vw, 28px);
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--navy-deep);
}
.page-about .about-next__links{
  display: grid;
  gap: var(--s2);
}
.page-about .about-next__card{
  display: block;
  padding: var(--s3);
  border-radius: var(--r-card);
  background: var(--white);
  border: 1px solid var(--about-line-soft);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.page-about .about-next__card:hover,
.page-about .about-next__card:focus-visible{
  border-color: var(--whistle);
  background: rgba(242, 112, 31, .06);
}
.page-about .about-next__idx{
  display: inline-block;
  margin-bottom: var(--s1);
  padding: 2px 10px;
  border-radius: var(--r-pill);
  background: var(--turf);
  color: var(--pitch);
  font-size: 12px;
  letter-spacing: .1em;
}
.page-about .about-next__card .card__title{
  display: block;
  font-size: 17px;
  font-weight: 800;
  color: var(--navy-deep);
}
.page-about .about-next__card .card__meta{
  display: block;
  margin-top: 4px;
  font-size: 14px;
  color: var(--about-soft);
}

/* ---- 平板及以上 ---- */
@media (min-width: 720px){
  .page-about .about-hero{ padding: var(--s5) 0 var(--s6); }
  .page-about .about-hero__lede{ font-size: 17px; }
  .page-about .about-board__stats{ gap: var(--s4) var(--s3); }
  .page-about .about-sec__grid{ grid-template-columns: 180px minmax(0, 1fr); gap: var(--s4); align-items: start; }
  .page-about .chapter-num{ font-size: 96px; }
  .page-about .about-sec__note{
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    margin: var(--s3) 0 0 6px;
    font-size: 11px;
  }
  .page-about .about-origin{
    grid-template-columns: minmax(0, 1.4fr) minmax(240px, 340px);
    align-items: start;
    gap: var(--s4);
  }
  .page-about .about-flow__sum{
    grid-template-columns: 44px minmax(0, 1fr) auto auto;
    grid-template-areas: "idx name role time";
    gap: var(--s2);
  }
  .page-about .about-flow__time{
    display: inline;
    grid-area: time;
    font-size: 13px;
    color: var(--clay);
    white-space: nowrap;
  }
  .page-about .about-flow__role{ grid-area: role; white-space: nowrap; }
  .page-about .about-role{ padding-left: var(--s4); }
  .page-about .about-legal__row{
    grid-template-columns: 160px minmax(0, 1fr);
    gap: var(--s3);
    align-items: baseline;
  }
  .page-about .about-next__links{ grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* ---- 桌面 ---- */
@media (min-width: 1000px){
  .page-about .about-hero__inner{
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 380px);
    align-items: center;
    gap: var(--s5);
  }
  .page-about .about-hero__note{
    display: block;
    position: absolute;
    top: 90px;
    right: max(24px, calc((100% - var(--wrap)) / 2));
    color: rgba(221, 233, 220, .62);
  }
  .page-about .about-sec__grid{
    grid-template-columns: 210px minmax(0, 1fr);
    gap: var(--s5);
  }
  .page-about .about-sec__lede,
  .page-about .about-prose p{ font-size: 17px; }
  .page-about .about-roles{
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-flow__sum{ padding-right: var(--s4); }
  .page-about .about-next__links{ grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (prefers-reduced-motion: reduce){
  .page-about *,
  .page-about *::before,
  .page-about *::after{
    transition: none !important;
    animation: none !important;
  }
}