.page-about {
  --ab-pad: 34px;
  color: var(--paper);
}

.page-about .ab-crumbs-wrap {
  padding-top: 16px;
  padding-bottom: 4px;
}

/* ---------- 首屏框景 ---------- */
.page-about .ab-hero {
  position: relative;
  margin-top: 10px;
  padding: 30px 0 38px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(120% 90% at 88% 4%, rgba(0, 229, 176, 0.14), transparent 60%),
    radial-gradient(90% 80% at 0% 100%, rgba(42, 36, 80, 0.55), transparent 62%),
    linear-gradient(180deg, var(--ink-800), var(--ink-900));
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 8px;
  background: repeating-linear-gradient(90deg, var(--line) 0 1px, transparent 1px 16px);
  opacity: 0.7;
}

.page-about .ab-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: start;
}

.page-about .ab-hero__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-about .ab-hero__fig {
  position: relative;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--r-2);
  overflow: hidden;
  aspect-ratio: 3 / 2;
  background: linear-gradient(150deg, var(--ink-700), var(--jade));
  box-shadow: 0 18px 44px rgba(4, 10, 17, 0.55), inset 0 1px 0 rgba(127, 245, 218, 0.16);
}

.page-about .ab-hero__fig img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  max-width: 100%;
}

.page-about .ab-hero__fig .qs-media__cap {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 6px 12px;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--paper);
  background: rgba(11, 20, 32, 0.82);
  border-top: 1px solid var(--line);
  border-right: 1px solid var(--line);
}

/* ---------- 数字条 ---------- */
.page-about .ab-stats {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r-2);
  overflow: hidden;
}

.page-about .ab-stats > li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 14px 16px;
  background: var(--ink-800);
}

.page-about .ab-stat__n {
  font-family: var(--font-num);
  font-size: 24px;
  line-height: 1.1;
  font-weight: 700;
  color: var(--mint);
  letter-spacing: -0.01em;
}

.page-about .ab-stat__u {
  font-size: 13px;
  margin-left: 2px;
  color: var(--mint-soft);
}

.page-about .ab-stat__l {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--steel);
}

/* ---------- 章节骨架 ---------- */
.page-about .ab-sec {
  padding: var(--ab-pad) 0;
  border-bottom: 1px solid var(--line);
}

.page-about .ab-sec__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .ab-sec__rail {
  display: flex;
  align-items: center;
  gap: 12px;
}

.page-about .ab-sec__idx {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--orange);
}

.page-about .ab-sec__line {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--line), transparent);
}

.page-about .ab-sec__body > p {
  margin: 0 0 14px;
  max-width: 66ch;
  color: var(--paper-2);
  line-height: 1.75;
}

.page-about .ab-lead {
  color: var(--paper) !important;
  font-size: 17px;
}

.page-about .ab-sub {
  margin: 26px 0 12px;
  font-family: var(--font-display);
  font-size: 15px;
  letter-spacing: 0.04em;
  color: var(--mint-soft);
}

.page-about .ab-foot-link {
  margin-top: 18px;
  font-size: 14px;
  color: var(--steel);
}

.page-about .ab-foot-link a {
  color: var(--mint);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
}

.page-about .ab-foot-link a:hover,
.page-about .ab-foot-link a:focus-visible {
  border-bottom-color: var(--orange);
}

/* ---------- 要点列表 ---------- */
.page-about .ab-lines {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .ab-lines > li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding: 11px 4px;
  background: var(--ink-900);
  font-size: 14px;
  color: var(--paper-2);
}

.page-about .ab-lines .qs-num {
  min-width: 96px;
  font-family: var(--font-num);
  font-size: 14px;
  color: var(--orange-soft);
  letter-spacing: 0.02em;
}

/* ---------- 功能分区 ---------- */
.page-about .ab-zones {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 20px;
}

.page-about .ab-zone {
  position: relative;
  padding: 18px 16px 20px;
  border: 1px solid var(--line);
  border-radius: var(--r-2);
  background: linear-gradient(158deg, var(--ink-700), var(--ink-800) 70%);
  box-shadow: inset 0 1px 0 rgba(127, 245, 218, 0.08);
}

.page-about .ab-zone--b {
  background: linear-gradient(158deg, var(--ink-800), var(--jade));
}

.page-about .ab-zone__n {
  display: block;
  font-family: var(--font-num);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--mint);
  margin-bottom: 8px;
}

.page-about .ab-zone__t {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 17px;
  line-height: 1.35;
  color: var(--paper);
}

.page-about .ab-zone__d {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--steel);
}

/* ---------- 房间编号 ---------- */
.page-about .ab-rooms {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.page-about .ab-room {
  --band: var(--band-01);
  position: relative;
  padding: 14px 8px 10px;
  text-align: center;
  font-family: var(--font-num);
  font-size: 15px;
  color: var(--paper);
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-top: 3px solid var(--band);
  border-radius: var(--r-1);
}

/* ---------- 资料库仪表盘 ---------- */
.page-about .ab-dash {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-top: 18px;
}

.page-about .ab-metric {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 16px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--mint);
  border-radius: var(--r-2);
  background: rgba(24, 43, 61, 0.62);
}

.page-about .ab-metric:nth-child(even) {
  border-left-color: var(--orange);
  background: rgba(42, 36, 80, 0.42);
}

.page-about .ab-metric__n {
  font-family: var(--font-num);
  font-size: 22px;
  font-weight: 700;
  line-height: 1.15;
  color: var(--paper);
}

.page-about .ab-metric__u {
  font-size: 12px;
  margin-left: 2px;
  color: var(--steel);
}

.page-about .ab-metric__l {
  font-size: 13px;
  color: var(--mint-soft);
  letter-spacing: 0.04em;
}

.page-about .ab-metric__d {
  font-size: 12px;
  line-height: 1.6;
  color: var(--steel);
}

/* ---------- 图片 ---------- */
.page-about .ab-figure {
  margin: 22px 0 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-2);
  overflow: hidden;
  background: var(--ink-800);
}

.page-about .ab-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.page-about .ab-figure .qs-media__cap {
  display: block;
  padding: 7px 12px;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--steel);
  border-top: 1px solid var(--line);
  background: var(--ink-900);
}

/* ---------- 十二栏目 ---------- */
.page-about .ab-bands {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
}

.page-about .ab-band {
  --band: var(--band-01);
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--band);
  border-radius: var(--r-1);
  background: rgba(24, 43, 61, 0.55);
}

.page-about .ab-band__id {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--band);
  min-width: 34px;
}

.page-about .ab-band__name {
  flex: 1;
  font-size: 14px;
  color: var(--paper);
}

.page-about .ab-band__n {
  font-family: var(--font-num);
  font-size: 14px;
  color: var(--steel);
}

/* ---------- 时间轨道 ---------- */
.page-about .ab-mile {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  position: relative;
}

.page-about .ab-mile::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--mint), var(--line) 65%, transparent);
}

.page-about .ab-mile > li {
  position: relative;
  padding-left: 32px;
  margin-bottom: 8px;
}

.page-about .ab-mile > li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 16px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  border: 2px solid var(--mint);
  background: var(--ink-900);
}

.page-about .ab-mile > li.ab-now::before {
  border-color: var(--orange);
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 90, 31, 0.16);
}

.page-about .ab-mile details {
  border: 1px solid var(--line);
  border-radius: var(--r-2);
  background: rgba(17, 31, 46, 0.82);
  overflow: hidden;
}

.page-about .ab-mile details[open] {
  border-color: var(--mint);
  background: rgba(18, 78, 74, 0.32);
}

.page-about .ab-now details {
  border-color: rgba(255, 90, 31, 0.55);
  background: rgba(74, 31, 46, 0.35);
}

.page-about .ab-mile summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 12px;
  padding: 12px 14px;
  cursor: pointer;
  list-style: none;
}

.page-about .ab-mile summary::-webkit-details-marker {
  display: none;
}

.page-about .ab-mile summary:focus-visible {
  outline: 2px solid var(--mint);
  outline-offset: -2px;
}

.page-about .ab-year {
  font-family: var(--font-num);
  font-size: 15px;
  font-weight: 700;
  color: var(--mint-soft);
  letter-spacing: 0.02em;
}

.page-about .ab-now .ab-year {
  color: var(--orange-soft);
}

.page-about .ab-mile__title {
  flex: 1;
  font-family: var(--font-display);
  font-size: 15px;
  color: var(--paper);
}

.page-about .ab-mile__plus {
  position: relative;
  width: 12px;
  height: 12px;
  flex: 0 0 12px;
}

.page-about .ab-mile__plus::before,
.page-about .ab-mile__plus::after {
  content: "";
  position: absolute;
  background: var(--steel);
  transition: transform 240ms var(--ease);
}

.page-about .ab-mile__plus::before {
  left: 0;
  top: 5px;
  width: 12px;
  height: 1px;
}

.page-about .ab-mile__plus::after {
  left: 5px;
  top: 0;
  width: 1px;
  height: 12px;
}

.page-about .ab-mile details[open] .ab-mile__plus::after {
  transform: scaleY(0);
}

.page-about .ab-mile details p {
  margin: 0;
  padding: 0 14px 14px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--paper-2);
  border-top: 1px solid var(--line);
  padding-top: 12px;
}

/* ---------- 收尾行动区 ---------- */
.page-about .ab-cta {
  padding: 36px 0 44px;
  background:
    radial-gradient(100% 120% at 10% 0%, rgba(0, 229, 176, 0.16), transparent 60%),
    linear-gradient(160deg, var(--ink-800), var(--ink-900));
}

.page-about .ab-cta__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  align-items: center;
}

.page-about .ab-cta__inner p {
  margin: 0 0 10px;
  max-width: 60ch;
  color: var(--paper-2);
  font-size: 15px;
  line-height: 1.75;
}

.page-about .ab-cta__inner .qs-h2 {
  margin-top: 6px;
}

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

.page-about .ab-cta__acts .qs-btn {
  flex: 1 1 180px;
  justify-content: center;
  text-align: center;
}

/* ---------- 色带分配 ---------- */
.page-about .ab-band:nth-child(1),
.page-about .ab-room:nth-child(1) { --band: var(--band-01); }
.page-about .ab-band:nth-child(2),
.page-about .ab-room:nth-child(2) { --band: var(--band-02); }
.page-about .ab-band:nth-child(3),
.page-about .ab-room:nth-child(3) { --band: var(--band-03); }
.page-about .ab-band:nth-child(4),
.page-about .ab-room:nth-child(4) { --band: var(--band-04); }
.page-about .ab-band:nth-child(5),
.page-about .ab-room:nth-child(5) { --band: var(--band-05); }
.page-about .ab-band:nth-child(6),
.page-about .ab-room:nth-child(6) { --band: var(--band-06); }
.page-about .ab-band:nth-child(7),
.page-about .ab-room:nth-child(7) { --band: var(--band-07); }
.page-about .ab-band:nth-child(8),
.page-about .ab-room:nth-child(8) { --band: var(--band-08); }
.page-about .ab-band:nth-child(9),
.page-about .ab-room:nth-child(9) { --band: var(--band-09); }
.page-about .ab-band:nth-child(10),
.page-about .ab-room:nth-child(10) { --band: var(--band-10); }
.page-about .ab-band:nth-child(11),
.page-about .ab-room:nth-child(11) { --band: var(--band-11); }
.page-about .ab-band:nth-child(12),
.page-about .ab-room:nth-child(12) { --band: var(--band-12); }

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-about {
    --ab-pad: 44px;
  }

  .page-about .ab-stats {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

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

  .page-about .ab-zone--a {
    grid-column: span 3;
  }

  .page-about .ab-zone--b {
    grid-column: span 3;
  }

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

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

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

  .page-about .ab-cta__inner {
    grid-template-columns: 1.4fr 1fr;
  }

  .page-about .ab-cta__acts {
    flex-direction: column;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-about .ab-hero {
    padding: 46px 0 52px;
  }

  .page-about .ab-hero__grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 40px;
  }

  .page-about .ab-sec__grid {
    grid-template-columns: 76px minmax(0, 1fr);
    gap: 34px;
  }

  .page-about .ab-sec__rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    align-self: stretch;
  }

  .page-about .ab-sec__idx {
    font-size: 13px;
    padding-top: 4px;
  }

  .page-about .ab-sec__line {
    width: 1px;
    flex: 1;
    min-height: 80px;
    height: auto;
    background: linear-gradient(180deg, var(--line), transparent);
  }

  .page-about .ab-zones {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }

  .page-about .ab-zone--a {
    grid-column: span 6;
  }

  .page-about .ab-zone--b {
    grid-column: span 6;
  }

  .page-about .ab-dash {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .ab-mile > li {
    padding-left: 40px;
  }
}

@media (min-width: 1080px) {
  .page-about .ab-zone--a {
    grid-column: span 5;
  }

  .page-about .ab-zone--b {
    grid-column: span 7;
  }

  .page-about .ab-zone--b + .ab-zone--b {
    grid-column: span 5;
  }

  .page-about .ab-zone--b:last-child {
    grid-column: span 7;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-mile__plus::before,
  .page-about .ab-mile__plus::after {
    transition: none;
  }
}
<<<END>>>