/* ===== 品牌自述页 作用域：.page-about ===== */
.page-about{
  --about-rail-w: 236px;
  --about-ink-soft: rgba(11, 17, 22, 0.08);
  background: var(--ld-mist);
  color: var(--ld-ink);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero{
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 4vw, 32px) 0 clamp(58px, 9vw, 104px);
  color: var(--ld-mist);
  background:
    radial-gradient(circle at 84% 6%, rgba(34, 240, 200, 0.30), transparent 44%),
    radial-gradient(circle at 4% 94%, rgba(255, 90, 43, 0.20), transparent 46%),
    linear-gradient(158deg, #22323f 0%, var(--ld-slate) 44%, #111c25 100%);
  clip-path: polygon(0 0, 100% 0, 100% 90%, 0 100%);
  border-bottom: 2px solid var(--ld-ink);
}
.page-about .about-hero::after{
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(233, 238, 243, 0.16) 1px, transparent 1px);
  background-size: 6px 6px;
  opacity: 0.45;
  pointer-events: none;
}
.page-about .about-hero > *{
  position: relative;
  z-index: 1;
}
.page-about .about-crumbs{
  margin-bottom: clamp(22px, 5vw, 44px);
  color: rgba(233, 238, 243, 0.68);
}
.page-about .about-crumbs ol,
.page-about .about-crumbs li{
  color: inherit;
}
.page-about .about-crumbs a{
  color: rgba(233, 238, 243, 0.82);
}
.page-about .about-hero .ld-kicker--cyan{
  color: var(--ld-cyan);
}
.page-about .about-hero__title{
  margin: 14px 0 0;
  font-size: clamp(2.2rem, 8.4vw, 5rem);
  font-weight: 300;
  letter-spacing: 0.06em;
  line-height: 1.12;
  max-width: 16em;
}
.page-about .about-hero__lede{
  margin: 20px 0 0;
  max-width: 40em;
  font-size: clamp(0.95rem, 2.4vw, 1.08rem);
  line-height: 1.9;
  color: rgba(233, 238, 243, 0.84);
}
.page-about .about-hero__stats{
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 20px;
  margin: clamp(30px, 6vw, 52px) 0 0;
  padding-top: 20px;
  border-top: 2px solid rgba(34, 240, 200, 0.5);
}
.page-about .about-hero__stat dt{
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(233, 238, 243, 0.6);
}
.page-about .about-hero__stat dd{
  margin: 6px 0 0;
  font-size: clamp(1.6rem, 6vw, 2.5rem);
  line-height: 1;
  color: var(--ld-cyan);
}

/* ---------- 主体骨架 ---------- */
.page-about .about-body{
  padding-top: clamp(34px, 7vw, 64px);
  padding-bottom: clamp(48px, 8vw, 96px);
}
.page-about .about-flow{
  min-width: 0;
}
.page-about .about-body{
  display: grid;
  gap: 26px;
}

/* ---------- 章节刻度尺 ---------- */
.page-about .about-rail{
  padding: 14px;
  border: 2px solid var(--ld-ink);
  border-radius: var(--ld-radius);
  background: var(--ld-ink);
  color: var(--ld-mist);
  box-shadow: 6px 6px 0 var(--ld-cyan);
}
.page-about .about-rail__label{
  margin: 0 0 10px;
  font-family: var(--ld-font-en);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ld-cyan);
}
.page-about .about-rail__list{
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.page-about .about-rail__link{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid rgba(233, 238, 243, 0.26);
  border-radius: 999px;
  color: rgba(233, 238, 243, 0.86);
  text-decoration: none;
  font-size: 13px;
  white-space: nowrap;
  transition: background 0.25s var(--ld-ease), color 0.25s var(--ld-ease), border-color 0.25s var(--ld-ease);
}
.page-about .about-rail__num{
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--ld-cyan);
}
.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible{
  border-color: var(--ld-cyan);
  background: rgba(34, 240, 200, 0.14);
}
.page-about .about-rail__link[aria-current="true"]{
  background: var(--ld-cyan);
  border-color: var(--ld-cyan);
  color: var(--ld-ink);
}
.page-about .about-rail__link[aria-current="true"] .about-rail__num{
  color: var(--ld-ink);
}
.page-about .about-rail__cta{
  margin-top: 14px;
  width: 100%;
  justify-content: center;
  text-align: center;
}

/* ---------- 章节标题 ---------- */
.page-about .about-sec__head{
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--ld-ink);
}
.page-about .about-sec__index{
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--ld-cyan-ink);
}
.page-about .about-sec__title{
  margin: 0;
  font-size: clamp(1.45rem, 4.6vw, 2.15rem);
  font-weight: 400;
  letter-spacing: 0.06em;
  line-height: 1.3;
}
.page-about .about-sec__title--light{
  color: var(--ld-mist);
}
.page-about .about-sec__prose p{
  margin: 0 0 1em;
}
.page-about .about-sec__prose p:last-child{
  margin-bottom: 0;
}

/* ---------- 赛季阶段 ---------- */
.page-about .about-stages{
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}
.page-about .about-stage{
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  gap: 4px 18px;
  padding: 18px 0;
  border-top: 2px solid var(--ld-ink);
}
.page-about .about-stage:last-child{
  border-bottom: 2px solid var(--ld-ink);
}
.page-about .about-stage__num{
  font-size: clamp(1.9rem, 8vw, 3.2rem);
  line-height: 1;
  color: var(--about-ink-soft);
  -webkit-text-stroke: 1.5px var(--ld-ink);
}
.page-about .about-stage__title{
  margin: 0 0 6px;
  font-size: 1.05rem;
  font-weight: 500;
  letter-spacing: 0.08em;
}
.page-about .about-stage__body p{
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.85;
  color: #24313c;
}

/* ---------- 双主线 ---------- */
.page-about .about-lines{
  display: grid;
  gap: 20px;
  margin-top: 26px;
}
.page-about .about-line{
  padding: 20px;
  border: 2px solid var(--ld-ink);
  border-radius: var(--ld-radius);
  background: #ffffff;
}
.page-about .about-line--cn{
  border-left: 10px solid var(--ld-orange);
  box-shadow: 8px 8px 0 rgba(255, 90, 43, 0.9);
}
.page-about .about-line--en{
  border-left: 10px solid var(--ld-purple);
  box-shadow: 8px 8px 0 rgba(74, 46, 143, 0.9);
}
.page-about .about-line__en{
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--ld-gray);
}
.page-about .about-line__title{
  margin: 0 0 10px;
  font-size: 1.3rem;
  font-weight: 500;
  letter-spacing: 0.07em;
}
.page-about .about-line__lede{
  margin: 0 0 14px;
  font-size: 0.95rem;
  line-height: 1.8;
  color: #2b3944;
}
.page-about .about-line__list{
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: var(--ld-line);
}
.page-about .about-line__list li{
  padding: 10px 0;
  border-bottom: var(--ld-line);
  font-size: 0.9rem;
  line-height: 1.8;
  color: #2b3944;
}
.page-about .about-line__k{
  display: block;
  font-family: var(--ld-font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ld-cyan-ink);
}
.page-about .about-line--cn .about-line__k{
  color: #c93c14;
}
.page-about .about-line--en .about-line__k{
  color: #4a2e8f;
}

/* ---------- 图片 ---------- */
.page-about .about-figure{
  margin: 26px 0 0;
}
.page-about .about-figure img{
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .about-figure .ld-media__caption{
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: #45565f;
}
.page-about .about-figure--stand .ld-media__caption{
  color: rgba(233, 238, 243, 0.7);
}

/* ---------- 英超简史深紫带 ---------- */
.page-about .about-band{
  position: relative;
  padding: clamp(22px, 5vw, 42px);
  border: 2px solid var(--ld-ink);
  border-radius: var(--ld-radius);
  color: var(--ld-mist);
  background:
    radial-gradient(circle at 92% 88%, rgba(34, 240, 200, 0.22), transparent 46%),
    linear-gradient(140deg, #3a2372 0%, var(--ld-purple) 52%, #2a1a55 100%);
  box-shadow: 8px 8px 0 var(--ld-ink);
  overflow: hidden;
}
.page-about .about-band__kicker{
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--ld-cyan);
}
.page-about .about-band__lede{
  margin: 14px 0 0;
  max-width: 46em;
  font-size: 0.96rem;
  line-height: 1.9;
  color: rgba(233, 238, 243, 0.86);
}
.page-about .about-crit{
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}
.page-about .about-crit__item{
  padding: 14px;
  border: 1px solid rgba(233, 238, 243, 0.28);
  border-radius: var(--ld-radius-sm);
  background: rgba(233, 238, 243, 0.07);
}
.page-about .about-crit__num{
  display: block;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ld-cyan);
}
.page-about .about-crit__name{
  margin: 8px 0 4px;
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.08em;
}
.page-about .about-crit__desc{
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(233, 238, 243, 0.72);
}
.page-about .about-progress{
  margin-top: 26px;
  padding-top: 20px;
  border-top: 1px dashed rgba(233, 238, 243, 0.36);
}
.page-about .about-progress__meta{
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}
.page-about .about-progress__label{
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(233, 238, 243, 0.68);
}
.page-about .about-progress__value{
  font-size: clamp(1.2rem, 4.6vw, 1.8rem);
  color: var(--ld-cyan);
}
.page-about .about-band .ld-bar{
  background: rgba(233, 238, 243, 0.18);
}
.page-about .about-band .ld-bar__fill{
  background: var(--ld-cyan);
}
.page-about .about-tip{
  margin: 12px 0 0;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 13px;
  line-height: 1.8;
  color: rgba(233, 238, 243, 0.82);
  transition: max-height 0.35s var(--ld-ease), opacity 0.35s var(--ld-ease);
}
.page-about .about-progress:hover .about-tip,
.page-about .about-progress:focus-within .about-tip{
  max-height: 120px;
  opacity: 1;
}

/* ---------- 工序技能树 ---------- */
.page-about .about-tree{
  display: grid;
  gap: 16px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}
.page-about .about-node{
  min-width: 0;
}
.page-about .about-node__box{
  height: 100%;
  border: 2px solid var(--ld-ink);
  border-radius: var(--ld-radius-sm);
  background: #ffffff;
  box-shadow: 6px 6px 0 rgba(34, 240, 200, 0.85);
}
.page-about .about-node__sum{
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding: 16px;
  cursor: pointer;
  list-style: none;
}
.page-about .about-node__sum::-webkit-details-marker{
  display: none;
}
.page-about .about-node__sum::after{
  content: "＋";
  margin-left: auto;
  font-family: var(--ld-font-mono);
  font-size: 14px;
  color: var(--ld-cyan-ink);
  transition: transform 0.25s var(--ld-ease);
}
.page-about .about-node__box[open] .about-node__sum::after{
  content: "－";
}
.page-about .about-node__num{
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--ld-cyan-ink);
}
.page-about .about-node__name{
  font-size: 1.05rem;
  font-weight: 500;
  letter-spacing: 0.08em;
}
.page-about .about-node__hint{
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ld-gray);
}
.page-about .about-node__body{
  padding: 0 16px 16px;
  border-top: 1px dashed rgba(124, 147, 166, 0.6);
}
.page-about .about-node__body p{
  margin: 14px 0 0;
  font-size: 0.9rem;
  line-height: 1.85;
  color: #2b3944;
}
.page-about .about-node__out{
  font-family: var(--ld-font-mono);
  font-size: 12px;
  color: #0f8f78;
}
.page-about .about-paces{
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  border-top: 2px solid var(--ld-ink);
}
.page-about .about-paces li{
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  padding: 12px 0;
  border-bottom: var(--ld-line);
  font-size: 0.9rem;
  line-height: 1.8;
}
.page-about .about-paces__k{
  min-width: 5.5em;
  font-family: var(--ld-font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--ld-cyan-ink);
}
.page-about .about-paces__v{
  flex: 1 1 12em;
  color: #2b3944;
}

/* ---------- 看台观察员 ---------- */
.page-about .about-stand{
  padding: clamp(20px, 5vw, 40px);
  border: 2px solid var(--ld-ink);
  border-radius: var(--ld-radius);
  color: var(--ld-mist);
  background:
    radial-gradient(circle at 12% 8%, rgba(34, 240, 200, 0.20), transparent 44%),
    linear-gradient(160deg, #14603f 0%, var(--ld-grass-deep) 58%, #082a1c 100%);
  box-shadow: 8px 8px 0 var(--ld-ink);
}
.page-about .about-stand .ld-kicker--cyan{
  color: var(--ld-cyan);
}
.page-about .about-stand .about-sec__title{
  margin-top: 12px;
}
.page-about .about-stand__lede{
  margin: 14px 0 0;
  max-width: 46em;
  font-size: 0.96rem;
  line-height: 1.9;
  color: rgba(233, 238, 243, 0.85);
}
.page-about .about-stand__grid{
  display: grid;
  gap: 20px;
  margin-top: 24px;
}
.page-about .about-figure--stand{
  margin: 0;
}
.page-about .about-stand__facts{
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-content: start;
  gap: 2px 14px;
}
.page-about .about-stand__num{
  font-size: clamp(1.5rem, 6vw, 2.2rem);
  line-height: 1.2;
  color: var(--ld-cyan);
}
.page-about .about-stand__fact{
  margin: 0 0 14px;
  align-self: center;
  font-size: 0.86rem;
  line-height: 1.7;
  color: rgba(233, 238, 243, 0.78);
}
.page-about .about-ticket{
  position: relative;
  margin: 26px 0 0;
  padding: 20px 20px 20px 34px;
  border: 2px dashed var(--ld-ink);
  border-radius: var(--ld-radius-sm);
  background: var(--ld-ticket);
  color: var(--ld-ink);
  box-shadow: 6px 6px 0 rgba(11, 17, 22, 0.9);
}
.page-about .about-ticket::before{
  content: "";
  position: absolute;
  top: 16px;
  bottom: 16px;
  left: -2px;
  width: 12px;
  background-image: radial-gradient(circle, var(--ld-grass-deep) 3px, transparent 3px);
  background-size: 12px 16px;
  background-repeat: repeat-y;
  opacity: 0.55;
}
.page-about .about-ticket p{
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.85;
}
.page-about .about-ticket__title{
  margin-bottom: 8px !important;
  font-family: var(--ld-font-mono);
  font-size: 11px !important;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #8a6320;
}

/* ---------- 季票档位 ---------- */
.page-about .about-tiers{
  display: grid;
  gap: 14px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}
.page-about .about-tier{
  padding: 16px;
  border: 2px solid var(--ld-ink);
  border-radius: var(--ld-radius-sm);
  background: var(--ld-ticket);
}
.page-about .about-tier__name{
  margin: 0 0 8px;
  font-size: 1.05rem;
  font-weight: 500;
  letter-spacing: 0.08em;
}
.page-about .about-tier p{
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: #2b3944;
}
.page-about .about-tier-note{
  margin: 20px 0 0;
  padding-left: 16px;
  border-left: 6px solid var(--ld-grass);
  font-size: 0.92rem;
  line-height: 1.9;
  color: #2b3944;
}
.page-about .about-links{
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 24px 0 0;
}

/* ---------- 合作与自评 ---------- */
.page-about .about-records{
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  border-top: 2px solid var(--ld-ink);
}
.page-about .about-record{
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 2px 16px;
  padding: 16px 0;
  border-bottom: var(--ld-line);
}
.page-about .about-record__num{
  grid-row: span 2;
  font-size: clamp(1.5rem, 5.6vw, 2.1rem);
  line-height: 1;
  color: var(--ld-cyan-ink);
}
.page-about .about-record__k{
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.06em;
}
.page-about .about-record__v{
  font-size: 0.88rem;
  line-height: 1.8;
  color: #46575f;
}
.page-about .about-selfeval{
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 4px 20px;
  margin-top: 24px;
  padding: 20px;
  border: 2px solid var(--ld-ink);
  border-radius: var(--ld-radius);
  background: #ffffff;
  box-shadow: 8px 8px 0 var(--ld-cyan);
}
.page-about .about-selfeval__grade{
  font-size: clamp(3rem, 12vw, 4.6rem);
  line-height: 1;
  color: var(--about-ink-soft);
  -webkit-text-stroke: 2px var(--ld-grass);
}
.page-about .about-selfeval__title{
  margin: 0 0 6px;
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.08em;
}
.page-about .about-selfeval__desc{
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.85;
  color: #2b3944;
}

/* ---------- 视觉：粗描边焦点 ---------- */
.page-about a:focus-visible,
.page-about summary:focus-visible,
.page-about .about-progress:focus-visible{
  outline: 2px solid var(--ld-cyan);
  outline-offset: 2px;
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 700px){
  .page-about .about-hero__stats{
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-lines{
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-crit{
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-tree{
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }
  .page-about .about-node{
    position: relative;
  }
  .page-about .about-node + .about-node::before{
    content: "";
    position: absolute;
    top: 34px;
    left: -22px;
    width: 22px;
    border-top: 2px dashed var(--ld-cyan-ink);
  }
  .page-about .about-stand__grid{
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: start;
  }
  .page-about .about-tiers{
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-record{
    grid-template-columns: auto minmax(0, 12em) minmax(0, 1fr);
    align-items: baseline;
  }
  .page-about .about-record__num{
    grid-row: span 1;
  }
}

/* ---------- 桌面：左侧刻度尺 + 右侧正文 ---------- */
@media (min-width: 960px){
  .page-about .about-body{
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: 44px;
    align-items: start;
  }
  .page-about .about-rail{
    position: sticky;
    top: calc(var(--ld-header-h) + 18px);
  }
  .page-about .about-rail__list{
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
  }
  .page-about .about-rail__link{
    width: 100%;
    border-radius: var(--ld-radius-sm);
  }
  .page-about .about-tip{
    max-height: 120px;
  }
}

@media (max-width: 699px){
  .page-about .about-tip{
    max-height: 160px;
    opacity: 1;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce){
  .page-about .about-rail__link,
  .page-about .about-tip,
  .page-about .about-node__sum::after{
    transition: none;
  }
}
</main>