.page-about {
  --about-rail-w: 168px;
  --about-line: 1px solid var(--mist);
  --about-line-soft: 1px solid rgba(196, 207, 224, 0.62);
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.75;
  overflow-x: hidden;
}

.page-about .breadcrumb {
  margin: 14px 0 6px;
}

/* ---------- 首屏框景 ---------- */
.page-about .about-hero {
  padding: 10px 0 34px;
  background-image:
    repeating-linear-gradient(to right, rgba(196, 207, 224, 0.34) 0 1px, transparent 1px 64px),
    repeating-linear-gradient(to bottom, rgba(196, 207, 224, 0.34) 0 1px, transparent 1px 64px);
}

.page-about .about-frame {
  position: relative;
  border: var(--about-line);
  background: rgba(255, 248, 240, 0.72);
  padding: 26px 18px 28px;
}

.page-about .about-tick {
  position: absolute;
  width: 14px;
  height: 14px;
  border: 2px solid var(--flare);
}
.page-about .about-tick--tl { top: -2px; left: -2px; border-right: 0; border-bottom: 0; }
.page-about .about-tick--tr { top: -2px; right: -2px; border-left: 0; border-bottom: 0; }
.page-about .about-tick--bl { bottom: -2px; left: -2px; border-right: 0; border-top: 0; }
.page-about .about-tick--br { bottom: -2px; right: -2px; border-left: 0; border-top: 0; }

.page-about .about-hero__grid {
  display: grid;
  gap: 26px;
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 6vw, 56px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  margin: 12px 0 16px;
  color: var(--ink);
}

.page-about .about-hero__text {
  margin: 0 0 20px;
  max-width: 44ch;
  color: var(--slate);
  font-size: 16px;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-panel {
  background: var(--ink);
  color: var(--paper);
  padding: 16px 16px 14px;
  border-top: 2px solid var(--flare);
}

.page-about .about-panel__head {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist);
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(196, 207, 224, 0.26);
}

.page-about .about-panel__dot {
  width: 7px;
  height: 7px;
  background: var(--cyan);
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(14, 124, 134, 0.22);
}

.page-about .about-panel__list {
  margin: 0;
  padding: 0;
}

.page-about .about-panel__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 0;
  border-bottom: 1px solid rgba(196, 207, 224, 0.16);
}
.page-about .about-panel__row:last-child { border-bottom: 0; }

.page-about .about-panel__row dt {
  font-size: 13px;
  color: var(--mist);
}

.page-about .about-panel__row dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--amber);
  letter-spacing: -0.01em;
}

/* ---------- 主题带 ---------- */
.page-about .about-band {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--ink);
  padding: 6px 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ---------- 主体骨架 ---------- */
.page-about .about-body {
  padding-top: 26px;
  padding-bottom: 10px;
}

.page-about .about-rail {
  position: sticky;
  top: 0;
  z-index: 6;
  background: var(--paper);
  border-bottom: var(--about-line);
  padding: 8px 0 6px;
  margin-bottom: 18px;
}

.page-about .about-rail__label {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--slate);
  text-transform: uppercase;
}

.page-about .about-rail__list {
  display: flex;
  gap: 4px;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}
.page-about .about-rail__list::-webkit-scrollbar { display: none; }

.page-about .about-rail__link {
  display: flex;
  align-items: baseline;
  gap: 6px;
  flex: 0 0 auto;
  padding: 7px 10px;
  font-size: 13px;
  color: var(--slate);
  text-decoration: none;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-rail__no {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--flare);
}

.page-about .about-rail__link[aria-current="true"] {
  color: var(--ink);
  border-bottom-color: var(--flare);
  background: linear-gradient(180deg, transparent 40%, rgba(255, 107, 26, 0.14) 100%);
}

/* ---------- 章节 ---------- */
.page-about .about-sec {
  position: relative;
  padding: 30px 0 34px;
  border-top: var(--about-line-soft);
}
.page-about .about-content > .about-sec:first-child {
  border-top: 0;
  padding-top: 4px;
}

.page-about .about-head {
  position: relative;
}

.page-about .about-head .eyebrow {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--flare);
}

.page-about .about-sec h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(23px, 3.8vw, 34px);
  line-height: 1.28;
  letter-spacing: -0.01em;
  margin: 0 0 14px;
  color: var(--ink);
  max-width: 20em;
}

.page-about .about-sec p {
  margin: 0 0 14px;
  color: var(--slate);
  max-width: 42em;
}

.page-about .about-sec p.about-lead {
  font-size: 16.5px;
  color: var(--ink);
  max-width: 36em;
}

.page-about .about-sec a {
  color: var(--ember);
  text-decoration: none;
  border-bottom: 1px solid rgba(216, 69, 31, 0.4);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-about .about-sec a:hover {
  color: var(--flare);
  border-bottom-color: var(--flare);
}

.page-about .about-inline-link {
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 13px;
}

.page-about .about-anno {
  display: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--slate);
  writing-mode: vertical-rl;
}

/* ---------- 关键数字列表 ---------- */
.page-about .about-facts {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
}

.page-about .about-fact {
  display: grid;
  gap: 6px;
  padding: 20px 0 22px;
  border-top: var(--about-line);
}

.page-about .about-fact__num {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 6px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(42px, 9vw, 62px);
  line-height: 0.95;
  letter-spacing: -0.04em;
  color: var(--ink);
}

.page-about .about-fact__unit {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0;
  color: var(--flare);
}

.page-about .about-fact__body h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  margin: 4px 0 6px;
  color: var(--ink);
}

.page-about .about-fact__body p {
  margin: 0;
  font-size: 15.5px;
  max-width: 40em;
}

/* ---------- 图片容器 ---------- */
.page-about .about-media {
  margin: 22px 0 24px;
  border: var(--about-line);
  background: var(--sand);
  overflow: hidden;
}

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

.page-about .about-media .media-frame__caption {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--slate);
  padding: 8px 10px;
  border-top: var(--about-line-soft);
  background: var(--paper);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
}

.page-about .about-stop {
  position: relative;
  border-left: 1px solid var(--mist);
  padding: 0 0 26px 20px;
}
.page-about .about-stop:last-child { padding-bottom: 0; }

.page-about .about-stop::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 8px;
  width: 9px;
  height: 9px;
  background: var(--flare);
}

.page-about .about-stop__ver {
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--flare);
  text-transform: uppercase;
}

.page-about .about-stop h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  margin: 0 0 6px;
  color: var(--ink);
}

.page-about .about-stop p {
  margin: 0;
  font-size: 15.5px;
  max-width: 38em;
}

/* ---------- 栏目展开 ---------- */
.page-about .about-cols {
  margin: 20px 0 0;
  border-top: var(--about-line);
}

.page-about .about-col {
  border-bottom: var(--about-line);
}

.page-about .about-col summary {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 13px 2px;
  cursor: pointer;
  list-style: none;
  transition: background var(--dur) var(--ease);
}
.page-about .about-col summary::-webkit-details-marker { display: none; }
.page-about .about-col summary:hover { background: rgba(242, 230, 214, 0.6); }
.page-about .about-col summary:focus-visible { outline: 2px solid var(--flare); outline-offset: 2px; }

.page-about .about-col summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 17px;
  color: var(--flare);
}
.page-about .about-col[open] summary::after { content: "–"; }

.page-about .about-col__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--flare);
  min-width: 20px;
}

.page-about .about-col__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  color: var(--ink);
}

.page-about .about-col__count {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  color: var(--slate);
  border: 1px solid var(--mist);
  padding: 1px 6px;
}

.page-about .about-col__body {
  padding: 2px 2px 16px;
}

.page-about .about-slots {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 6px;
}

.page-about .about-slots li {
  position: relative;
  padding-left: 34px;
  font-size: 14px;
  color: var(--slate);
  line-height: 1.6;
}

.page-about .about-slot__no {
  position: absolute;
  left: 0;
  top: 1px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--amber);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: 20px;
  margin-top: 18px;
}

.page-about .about-roster {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
}

.page-about .about-roster li {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 10px;
  padding: 14px 0;
  border-top: var(--about-line-soft);
}

.page-about .about-roster__num {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--flare);
  letter-spacing: -0.03em;
}

.page-about .about-roster h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  margin: 0 0 4px;
  color: var(--ink);
}

.page-about .about-roster p {
  margin: 0;
  font-size: 15px;
}

.page-about .about-media--side { margin-top: 0; }

/* ---------- 可用性沙色区块 ---------- */
.page-about .about-avail {
  background: var(--sand);
  border: var(--about-line);
  border-left: 3px solid var(--amber);
  padding: 20px 16px;
  margin: 22px 0;
}

.page-about .about-avail__grid {
  display: grid;
  gap: 16px;
}

.page-about .about-stat__num {
  margin: 0 0 4px;
  display: flex;
  align-items: baseline;
  gap: 4px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(28px, 6vw, 38px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--ink);
}

.page-about .about-stat__unit {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 500;
  color: var(--slate);
  letter-spacing: 0;
}

.page-about .about-stat__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(14, 124, 134, 0.18);
  align-self: center;
  margin-right: 4px;
}

.page-about .about-stat__cap {
  margin: 0;
  font-size: 13.5px;
  color: var(--slate);
  line-height: 1.6;
}

/* ---------- 收藏与记录 ---------- */
.page-about .about-keep {
  list-style: none;
  margin: 22px 0 18px;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .about-keep li {
  padding: 16px 0;
  border-top: var(--about-line);
}

.page-about .about-keep__num {
  margin: 0 0 4px;
  display: flex;
  align-items: baseline;
  gap: 4px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 32px;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--ink);
}

.page-about .about-keep__unit {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 500;
  color: var(--flare);
  letter-spacing: 0;
}

.page-about .about-keep__cap {
  margin: 0;
  font-size: 14.5px;
  color: var(--slate);
  max-width: 36em;
}

/* ---------- 收尾 ---------- */
.page-about .about-close {
  margin-top: 24px;
  padding: 30px 0 26px;
  background: var(--sand);
  border-top: 2px solid var(--flare);
}

.page-about .about-close__grid {
  display: grid;
  gap: 22px;
}

.page-about .about-close .eyebrow {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--flare);
}

.page-about .about-close h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 3.6vw, 32px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  margin: 0 0 10px;
  color: var(--ink);
}

.page-about .about-close p {
  margin: 0 0 16px;
  color: var(--slate);
  font-size: 15.5px;
  max-width: 40em;
}

.page-about .about-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-media--close { margin: 0; }

.page-about .about-coord {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 22px 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--slate);
  flex-wrap: wrap;
}

.page-about .about-coord__rule {
  display: inline-block;
  width: 34px;
  height: 1px;
  background: var(--flare);
}

/* ---------- 平板 ---------- */
@media (min-width: 760px) {
  .page-about .about-frame { padding: 32px 28px 34px; }

  .page-about .about-fact {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 26px;
    align-items: start;
  }

  .page-about .about-fact__num { font-size: clamp(48px, 6vw, 64px); }

  .page-about .about-avail__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px 26px;
  }

  .page-about .about-slots {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 6px 18px;
  }

  .page-about .about-keep {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 24px;
  }

  .page-about .about-keep li { padding: 16px 0 4px; }
}

/* ---------- 桌面：左栏刻度 + 右侧长页 ---------- */
@media (min-width: 900px) {
  .page-about .about-hero { padding: 18px 0 44px; }

  .page-about .about-frame { padding: 40px 34px 44px; }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .about-panel { padding: 18px 18px 16px; }

  .page-about .about-body {
    display: grid;
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: 44px;
    align-items: start;
    padding-top: 34px;
  }

  .page-about .about-rail {
    position: sticky;
    top: 92px;
    border-bottom: 0;
    border-right: var(--about-line);
    padding: 0 18px 0 0;
    margin-bottom: 0;
    background: transparent;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
  }

  .page-about .about-rail__list {
    display: block;
    overflow: visible;
  }

  .page-about .about-rail__link {
    padding: 8px 0 8px 10px;
    border-bottom: 0;
    border-left: 2px solid transparent;
    white-space: normal;
  }

  .page-about .about-rail__link[aria-current="true"] {
    border-left-color: var(--flare);
    background: linear-gradient(90deg, rgba(255, 107, 26, 0.14), transparent 85%);
  }

  .page-about .about-sec { padding: 38px 0 44px; }

  .page-about .about-head { display: flex; align-items: flex-start; gap: 14px; }
  .page-about .about-head > .eyebrow,
  .page-about .about-head > h2 { flex: 0 1 auto; }
  .page-about .about-head { flex-wrap: wrap; }

  .page-about .about-head .about-anno {
    display: block;
    margin-left: auto;
    align-self: flex-start;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    gap: 34px;
    align-items: start;
  }

  .page-about .about-close__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 36px;
    align-items: center;
  }
}

@media (min-width: 1200px) {
  .page-about .about-body { gap: 56px; }
  .page-about .about-sec p { font-size: 16.5px; }
  .page-about .about-keep__num { font-size: 38px; }
}
<<<END>>>