.page-about{
  background:
    linear-gradient(180deg, rgba(0,242,195,.06), transparent 380px),
    var(--ink);
  color: var(--text);
  font-family: var(--font-body);
  padding-bottom: 64px;
  overflow-x: hidden;
}
.page-about a:focus-visible,
.page-about summary:focus-visible{
  outline: 2px solid var(--cyan-soft);
  outline-offset: 3px;
}
.page-about .about-shell{
  padding-top: 20px;
}

/* ---------- hero ---------- */
.page-about .about-hero{
  display: grid;
  gap: var(--gap);
  padding: 18px 0 40px;
  border-bottom: 1px solid var(--line);
}
.page-about .about-hero h1{
  margin: 10px 0 16px;
  font-size: clamp(34px, 7.4vw, 64px);
  line-height: 1.06;
  letter-spacing: -.02em;
  font-weight: 900;
  color: var(--text);
}
.page-about .about-hero h1 span{
  color: var(--cyan);
}
.page-about .about-hero__lead{
  margin: 0 0 12px;
  max-width: 46ch;
  font-size: 17px;
  line-height: 1.75;
  color: var(--text);
}
.page-about .about-hero__note{
  margin: 0;
  max-width: 44ch;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}
.page-about .hero-tiles{
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}
.page-about .hero-tile{
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 12px 12px;
  background: var(--card);
  border: 1px solid var(--line);
  transition: border-color .18s ease, transform .18s ease;
}
.page-about .hero-tile::before{
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 16px;
  height: 2px;
  background: var(--cyan);
}
.page-about .hero-tile--wide{
  grid-column: span 2;
}
.page-about .hero-tile--warm::before{
  background: var(--orange);
  width: 34px;
}
.page-about .hero-tile--warm{
  border-color: rgba(255,138,43,.4);
}
.page-about .hero-tile__num{
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan-soft);
  letter-spacing: -.01em;
}
.page-about .hero-tile--warm .hero-tile__num{
  color: var(--orange-soft);
}
.page-about .hero-tile__unit{
  font-size: 14px;
  margin-left: 2px;
  color: var(--muted);
}
.page-about .hero-tile__label{
  font-size: 12px;
  letter-spacing: .06em;
  line-height: 1.5;
  color: var(--muted);
}

/* ---------- section shell ---------- */
.page-about .about-section{
  padding: 44px 0;
  border-bottom: 1px solid var(--line-soft);
}
.page-about .about-section--last{
  border-bottom: none;
}
.page-about .about-section__head{
  position: relative;
  padding-left: 22px;
  margin-bottom: 26px;
}
.page-about .about-section__anno{
  position: absolute;
  left: 0;
  top: 4px;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--cyan);
  opacity: .85;
}
.page-about .about-section__title{
  margin: 0 0 12px;
  font-size: clamp(24px, 4.4vw, 32px);
  line-height: 1.22;
  letter-spacing: -.015em;
  font-weight: 900;
}
.page-about .about-section__lead{
  margin: 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 01 编辑部的一天 ---------- */
.page-about .day-layout{
  display: grid;
  gap: var(--gap);
}
.page-about .day-rail{
  list-style: none;
  margin: 0;
  padding: 0 0 0 18px;
  border-left: 1px solid var(--line);
  display: grid;
  gap: 16px;
}
.page-about .day-slot{
  position: relative;
  padding: 16px;
  background: var(--card);
  border: 1px solid var(--line);
}
.page-about .day-slot::before{
  content: "";
  position: absolute;
  left: -25px;
  top: 22px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--board);
  border: 2px solid var(--cyan);
}
.page-about .day-slot--warm::before{
  border-color: var(--orange);
  background: var(--orange);
}
.page-about .day-slot__time{
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--cyan-soft);
}
.page-about .day-slot--warm .day-slot__time{
  color: var(--orange-soft);
}
.page-about .day-slot__title{
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
}
.page-about .day-slot__text{
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}
.page-about .day-side{
  display: grid;
  gap: 12px;
  align-content: start;
}
.page-about .day-figure{
  margin: 0;
}
.page-about .day-figure img{
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .day-stats{
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}
.page-about .day-stat{
  padding: 12px;
  border: 1px dashed var(--line);
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.page-about .day-stat__num{
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
}
.page-about .day-stat__label{
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: .04em;
  color: var(--muted);
}

/* ---------- 02 团队分工 ---------- */
.page-about .team-grid{
  display: grid;
  gap: 14px;
}
.page-about .team-card{
  padding: 18px 16px;
  background: var(--board);
  border: 1px solid var(--line);
  border-top: 2px solid var(--line);
  transition: border-top-color .18s ease, transform .18s ease, background .18s ease;
}
.page-about .team-card:hover,
.page-about .team-card:focus-within{
  border-top-color: var(--cyan);
  transform: translateY(-2px);
  background: var(--card);
}
.page-about .team-card__num{
  display: block;
  font-family: var(--font-mono);
  font-size: 42px;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  margin-bottom: 6px;
}
.page-about .team-card__role{
  margin: 0 0 8px;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -.01em;
}
.page-about .team-card__text{
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}
.page-about .team-card__duties{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 6px;
  border-top: 1px solid var(--line);
  padding-top: 10px;
}
.page-about .team-card__duties li{
  position: relative;
  padding-left: 14px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text);
}
.page-about .team-card__duties li::before{
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  background: var(--cyan);
  transform: rotate(45deg);
}
.page-about .team-note{
  padding: 18px 16px;
  background: rgba(10,40,34,.55);
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
}
.page-about .team-note__label{
  margin: 0 0 10px;
  color: var(--orange-soft);
}
.page-about .team-note__text{
  margin: 0 0 10px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text);
}
.page-about .team-note__text:last-child{
  margin-bottom: 0;
  color: var(--muted);
}

/* ---------- 03 时间轴 ---------- */
.page-about .path-figure{
  margin: 0 0 20px;
}
.page-about .path-figure img{
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .track{
  display: grid;
  gap: 10px;
  position: relative;
}
.page-about .track-node{
  border: 1px solid var(--line);
  background: var(--card);
  padding: 0 14px;
}
.page-about .track-node > summary{
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 0;
}
.page-about .track-node > summary::-webkit-details-marker{
  display: none;
}
.page-about .track-node > summary::after{
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--cyan);
}
.page-about .track-node[open] > summary::after{
  content: "−";
  color: var(--orange);
}
.page-about .track-node__year{
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--cyan);
}
.page-about .track-node--warm .track-node__year{
  color: var(--orange);
}
.page-about .track-node__name{
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
}
.page-about .track-node__text{
  margin: 0;
  padding: 0 0 14px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
  border-top: 1px dashed var(--line);
  padding-top: 12px;
}

/* ---------- 04 资料来源 ---------- */
.page-about .source-layout{
  display: grid;
  gap: var(--gap);
}
.page-about .region-map{
  position: relative;
  min-height: 168px;
  border: 1px solid var(--line);
  background-color: var(--board);
  overflow: hidden;
}
.page-about .region-dots{
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(0,242,195,.55) 2px, transparent 2.6px);
  background-size: 26px 26px;
  background-position: 10px 10px;
  -webkit-mask-image: radial-gradient(circle at 40% 45%, #000 42%, transparent 88%);
  mask-image: radial-gradient(circle at 40% 45%, #000 42%, transparent 88%);
}
.page-about .region-map__badge{
  position: absolute;
  right: 14px;
  bottom: 12px;
  font-family: var(--font-mono);
  font-size: 40px;
  font-weight: 700;
  line-height: 1;
  color: var(--orange-soft);
  text-shadow: 0 0 18px rgba(255,138,43,.45);
}
.page-about .source-body{
  display: grid;
  gap: 14px;
}
.page-about .source-item{
  padding-left: 14px;
  border-left: 1px solid var(--line);
}
.page-about .source-item__title{
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
}
.page-about .source-item__text{
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 05 本地运营 ---------- */
.page-about .local-layout{
  display: grid;
  gap: var(--gap);
}
.page-about .local-figure{
  margin: 0;
}
.page-about .local-figure img{
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .local-body{
  display: grid;
  gap: 18px;
}
.page-about .local-faq__title,
.page-about .local-contact__title{
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 700;
}
.page-about .local-faq__list{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}
.page-about .local-faq__list li{
  position: relative;
  padding: 10px 12px 10px 26px;
  background: var(--card);
  border: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.7;
  color: var(--text);
}
.page-about .local-faq__list li::before{
  content: "?";
  position: absolute;
  left: 10px;
  top: 9px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--orange);
}
.page-about .local-contact{
  padding: 16px;
  border: 1px solid var(--line);
  background: rgba(10,40,34,.55);
}
.page-about .local-contact__note{
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}
.page-about .local-contact__icp{
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--muted);
}

/* ---------- 下一步 ---------- */
.page-about .about-next{
  padding: 40px 0 0;
}
.page-about .about-next__title{
  margin: 0 0 16px;
  font-size: 22px;
  font-weight: 900;
  letter-spacing: -.01em;
}
.page-about .about-next__list{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.page-about .about-next__item{
  min-width: 0;
}
.page-about .about-next__link{
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 16px;
  background: var(--card);
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  text-decoration: none;
  color: var(--text);
  transition: background .18s ease, border-color .18s ease, transform .18s ease;
}
.page-about .about-next__link--warm{
  border-left-color: var(--orange);
}
.page-about .about-next__link:hover{
  background: var(--board);
  border-color: var(--cyan-soft);
  transform: translateX(3px);
}
.page-about .about-next__link--warm:hover{
  border-color: rgba(255,138,43,.6);
}
.page-about .about-next__name{
  font-size: 16px;
  font-weight: 700;
}
.page-about .about-next__meta{
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--muted);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px){
  .page-about .hero-tiles{
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .hero-tile--wide{
    grid-column: span 2;
  }
  .page-about .track{
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .team-grid{
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
  }
  .page-about .about-next__list{
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .local-body{
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
  }
}

@media (min-width: 960px){
  .page-about .about-shell{
    padding-top: 28px;
  }
  .page-about .about-hero{
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 28px;
    align-items: start;
    padding-bottom: 48px;
  }
  .page-about .hero-tiles{
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin-top: 34px;
  }
  .page-about .hero-tile__num{
    font-size: 34px;
  }
  .page-about .about-section{
    padding: 56px 0;
  }
  .page-about .about-section__head{
    padding-left: 28px;
  }
  .page-about .day-layout{
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 28px;
    align-items: start;
  }
  .page-about .team-grid{
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 18px;
  }
  .page-about .team-card--a{ grid-column: span 5; }
  .page-about .team-card--b{ grid-column: span 4; }
  .page-about .team-card--c{ grid-column: span 3; }
  .page-about .team-card--d{ grid-column: span 5; }
  .page-about .team-note{ grid-column: span 7; }
  .page-about .track{
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
    padding-top: 26px;
  }
  .page-about .track::before{
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 9px;
    height: 1px;
    background: linear-gradient(90deg, var(--cyan), rgba(30,74,63,.4) 70%, transparent);
  }
  .page-about .track-node{
    position: relative;
    margin-top: 18px;
  }
  .page-about .track-node::before{
    content: "";
    position: absolute;
    left: 14px;
    top: -20px;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--cyan);
    box-shadow: 0 0 0 3px rgba(0,242,195,.18);
  }
  .page-about .track-node--warm::before{
    background: var(--orange);
    box-shadow: 0 0 0 3px rgba(255,138,43,.22);
  }
  .page-about .track-node > summary{
    flex-direction: column;
    gap: 6px;
    align-items: flex-start;
  }
  .page-about .track-node > summary::after{
    position: absolute;
    right: 12px;
    top: 14px;
    margin: 0;
  }
  .page-about .source-layout{
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 28px;
    align-items: start;
  }
  .page-about .region-map{
    min-height: 260px;
  }
  .page-about .local-layout{
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 28px;
    align-items: start;
  }
  .page-about .local-body{
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-next__list{
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-next__link:hover{
    transform: translateY(-3px);
  }
}

@media (prefers-reduced-motion: reduce){
  .page-about *{
    transition: none !important;
    animation: none !important;
  }
  .page-about .about-next__link:hover,
  .page-about .team-card:hover{
    transform: none;
  }
}