.page-about {
  --about-rail: 200px;
  background: var(--night);
  color: var(--mist);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 28px 0 56px;
  border-bottom: 3px solid var(--line);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(34, 224, 224, .14), transparent 62%),
    var(--night);
  overflow: hidden;
}

.page-about .about-hero__slab {
  position: absolute;
  right: -14%;
  bottom: -28%;
  width: 74%;
  height: 96%;
  background: linear-gradient(140deg, var(--orange), rgba(255, 194, 75, .5));
  clip-path: polygon(34% 0, 100% 0, 100% 100%, 0 100%);
  opacity: .13;
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(36, 69, 127, .5) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(36, 69, 127, .35) 1px, transparent 1px);
  background-size: 96px 96px;
  mask-image: linear-gradient(115deg, rgba(0, 0, 0, .9), transparent 70%);
  opacity: .55;
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .breadcrumb {
  margin-bottom: 26px;
}

.page-about .about-hero__kicker {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-hero__title {
  margin: 0 0 20px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(36px, 9.4vw, 78px);
  line-height: 1.06;
  letter-spacing: -.02em;
  color: var(--mist);
  text-wrap: balance;
}

.page-about .about-hero__title br {
  display: none;
}

.page-about .about-hero__lead {
  max-width: 62ch;
  margin: 0 0 30px;
  font-size: 17px;
  line-height: 1.75;
  color: var(--steel);
}

.page-about .about-hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 章节通用 ---------- */
.page-about .about-chapter {
  padding: 58px 0;
  border-bottom: 1px solid rgba(36, 69, 127, .6);
}

.page-about .about-chapter--deep {
  background: var(--deep);
}

.page-about .about-chapter--closing {
  background:
    linear-gradient(180deg, rgba(255, 106, 26, .06), transparent 42%),
    var(--night);
  border-bottom: 0;
}

.page-about .about-chapter .section-band {
  margin-bottom: 30px;
}

.page-about .about-chapter__grid {
  gap: 32px;
}

.page-about .about-chapter__main p + p {
  margin-top: 18px;
}

.page-about .about-chapter__side {
  align-self: start;
}

.page-about .about-chapter__intro {
  margin: 0 0 30px;
  color: var(--steel);
}

.page-about .about-note {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--steel);
}

.page-about .about-note--rot {
  margin: 14px 0 0;
  writing-mode: vertical-rl;
  letter-spacing: .22em;
  color: rgba(147, 168, 196, .8);
}

/* ---------- 01 能力 ---------- */
.page-about .about-caps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-caps__item {
  position: relative;
  padding: 16px 18px 18px;
  background: var(--panel);
  border: 2px solid var(--line);
  border-left: 6px solid var(--cyan);
  box-shadow: var(--shadow-hard);
}

.page-about .about-caps__item:nth-child(2) {
  border-left-color: var(--orange);
}

.page-about .about-caps__item:nth-child(3) {
  border-left-color: var(--gold);
}

.page-about .about-caps__ttl {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 19px;
  font-weight: 800;
  letter-spacing: .01em;
  color: var(--mist);
}

.page-about .about-caps__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--steel);
}

/* ---------- 02 人群 ---------- */
.page-about .about-audience {
  display: grid;
  gap: 18px;
}

.page-about .about-audience__card {
  padding: 22px 20px 24px;
  background: var(--panel);
  border: 2px solid var(--line);
  box-shadow: var(--shadow-hard);
  transition: transform 180ms ease, border-color 180ms ease;
}

.page-about .about-audience__card h3 {
  margin: 14px 0 10px;
  font-family: var(--font-head);
  font-size: 21px;
  font-weight: 800;
  line-height: 1.35;
  color: var(--mist);
}

.page-about .about-audience__card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--steel);
}

.page-about .about-audience__card:hover {
  border-color: var(--cyan);
}

@media (min-width: 860px) {
  .page-about .about-audience {
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
  }
  .page-about .about-audience__card:nth-child(2) {
    transform: translateY(22px);
  }
  .page-about .about-audience__card:nth-child(3) {
    transform: translateY(44px);
  }
}

/* ---------- 03 数据来源 ---------- */
.page-about .about-figure {
  margin: 0 0 30px;
}

.page-about .about-figure--faint {
  opacity: .6;
  margin-bottom: 22px;
}

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

.page-about .about-source__lead p + p {
  margin-top: 16px;
}

.page-about .about-source__flow {
  display: grid;
  gap: 14px;
}

.page-about .about-source__step {
  position: relative;
  padding: 18px 18px 18px 20px;
  border: 2px solid var(--line);
  background: rgba(22, 48, 92, .55);
}

.page-about .about-source__step::before {
  content: "";
  position: absolute;
  left: -2px;
  top: -2px;
  bottom: -2px;
  width: 5px;
  background: linear-gradient(180deg, var(--cyan), rgba(34, 224, 224, .2));
}

.page-about .about-source__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--cyan);
}

.page-about .about-source__step h3 {
  margin: 8px 0 8px;
  font-family: var(--font-head);
  font-size: 19px;
  font-weight: 800;
  color: var(--mist);
}

.page-about .about-source__step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--steel);
}

@media (min-width: 900px) {
  .page-about .about-source {
    grid-template-columns: 7fr 4fr;
    gap: 40px;
    align-items: start;
  }
  .page-about .about-source__flow {
    grid-template-columns: 1fr;
  }
}

/* ---------- 数据脉冲带 ---------- */
.page-about .about-pulse {
  background: linear-gradient(100deg, var(--panel) 0%, var(--deep) 58%, var(--panel) 100%);
  border-top: 3px solid var(--line);
  border-bottom: 3px solid var(--line);
  padding: 34px 0;
}

.page-about .about-pulse__inner {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 26px 16px;
}

.page-about .about-pulse .stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  border-left: 3px solid var(--orange);
  padding-left: 14px;
}

.page-about .about-pulse .stat:nth-child(2) {
  border-left-color: var(--cyan);
}

.page-about .about-pulse .stat:nth-child(3) {
  border-left-color: var(--gold);
}

.page-about .about-pulse .stat__num {
  color: var(--mist);
  font-size: 40px;
  line-height: 1;
}

.page-about .about-pulse .stat__unit {
  font-size: 13px;
  color: var(--steel);
}

@media (min-width: 860px) {
  .page-about .about-pulse__inner {
    grid-template-columns: repeat(4, 1fr);
  }
  .page-about .about-pulse .stat__num--xl {
    font-size: 64px;
  }
}

/* ---------- 04 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: 32px;
}

.page-about .about-team__visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  padding: 22px 18px;
  border: 2px solid var(--line);
  background: rgba(8, 18, 38, .6);
}

.page-about .about-ring {
  width: 100%;
  max-width: 240px;
  height: auto;
}

.page-about .about-ring__num {
  font-family: var(--font-mono);
  font-size: 42px;
  font-weight: 700;
  fill: var(--mist);
}

.page-about .about-ring__cap {
  font-size: 13px;
  fill: var(--steel);
}

.page-about .about-ring__legend {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--steel);
}

.page-about .about-ring__legend li {
  display: flex;
  align-items: center;
  gap: 9px;
}

.page-about .about-dot {
  width: 10px;
  height: 10px;
  display: inline-block;
  background: var(--cyan);
}

.page-about .about-dot--orange {
  background: var(--orange);
}

.page-about .about-dot--gold {
  background: var(--gold);
}

.page-about .about-team__body > p {
  margin: 0 0 22px;
}

.page-about .about-team__body .expand + .expand {
  margin-top: 12px;
}

.page-about .about-team__figure {
  margin: 0;
}

@media (min-width: 900px) {
  .page-about .about-team {
    grid-template-columns: 5fr 7fr;
    gap: 36px;
    align-items: start;
  }
  .page-about .about-team__side {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 24px;
    align-items: end;
  }
  .page-about .about-team__side .about-note--rot {
    justify-self: start;
    height: 160px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-team {
    grid-template-columns: 4fr 7fr;
  }
}

/* ---------- 05 时间线 ---------- */
.page-about .about-timeline {
  display: grid;
  gap: 18px;
}

.page-about .about-stage {
  display: grid;
  gap: 14px;
  position: relative;
}

.page-about .about-stage__rail {
  position: relative;
  z-index: 0;
  align-self: start;
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 10px 14px 10px 18px;
  color: var(--mist);
}

.page-about .about-stage__rail::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--panel);
  border: 2px solid var(--line);
  border-left: 6px solid var(--cyan);
  transform: skewY(-6deg);
  z-index: -1;
}

.page-about .about-stage:nth-child(2) .about-stage__rail::before {
  border-left-color: var(--orange);
}

.page-about .about-stage:nth-child(3) .about-stage__rail::before {
  border-left-color: var(--gold);
}

.page-about .about-stage:nth-child(4) .about-stage__rail::before {
  border-left-color: var(--live);
}

.page-about .about-stage__no {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-about .about-stage__name {
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: .04em;
}

.page-about .about-stage__body {
  padding: 0 0 22px;
  border-bottom: 1px dashed rgba(36, 69, 127, .9);
}

.page-about .about-stage:last-child .about-stage__body {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-stage__ttl {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: 21px;
  font-weight: 800;
  line-height: 1.35;
  color: var(--mist);
}

.page-about .about-stage__body > p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--steel);
}

.page-about .about-stage__body .expand__panel p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--steel);
}

@media (min-width: 900px) {
  .page-about .about-stage {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: 34px;
  }
  .page-about .about-stage__rail {
    flex-direction: column;
    gap: 6px;
    align-items: flex-start;
    padding: 16px 18px 16px 22px;
  }
  .page-about .about-stage__name {
    font-size: 20px;
  }
  .page-about .about-timeline {
    gap: 8px;
  }
}

/* ---------- 06 合作 ---------- */
.page-about .about-partner {
  display: grid;
  gap: 14px;
}

.page-about .about-partner .expand__panel p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--steel);
}

.page-about .about-partner__next {
  margin: 26px 0 0;
  color: var(--steel);
}

.page-about .about-partner__next a {
  color: var(--cyan);
}

@media (min-width: 860px) {
  .page-about .about-partner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }
}

/* ---------- 07 对比表 ---------- */
.page-about .about-matrix {
  border: 2px solid var(--line);
  background: rgba(22, 48, 92, .45);
  box-shadow: var(--shadow-hard);
  overflow-x: auto;
}

.page-about .about-table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
}

.page-about .about-table th,
.page-about .about-table td {
  padding: 14px 16px;
  text-align: left;
  vertical-align: top;
  font-size: 14px;
  line-height: 1.65;
  border-bottom: 1px solid rgba(36, 69, 127, .8);
}

.page-about .about-table thead th {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--cyan);
  background: rgba(8, 18, 38, .8);
  border-bottom: 2px solid var(--line);
}

.page-about .about-table tbody th {
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 800;
  color: var(--mist);
  white-space: nowrap;
  border-left: 4px solid var(--orange);
}

.page-about .about-table tbody td {
  color: var(--steel);
}

.page-about .about-table tbody tr:last-child th,
.page-about .about-table tbody tr:last-child td {
  border-bottom: 0;
}

.page-about .about-matrix__note {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--steel);
}

.page-about .about-matrix__note a {
  color: var(--cyan);
}

/* ---------- 08 收束 ---------- */
.page-about .about-cta {
  padding: 22px 20px 24px;
  border: 2px solid var(--orange);
  background: rgba(255, 106, 26, .07);
  box-shadow: var(--shadow-cyan);
  display: grid;
  gap: 12px;
  justify-items: start;
}

.page-about .about-cta__ttl {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--orange);
}

.page-about .about-cta__txt {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist);
}

@media (min-width: 900px) {
  .page-about .about-chapter__grid {
    gap: 44px;
  }
}

@media (min-width: 1280px) {
  .page-about .about-hero {
    padding: 40px 0 84px;
  }
  .page-about .about-chapter {
    padding: 76px 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-audience__card,
  .page-about .about-audience__card:hover {
    transform: none;
    transition: none;
  }
}
</｜｜DSML｜｜ parameter>
</｜｜DSML｜｜ invoke>
</｜｜DSML｜｜ calls>