.page-about {
  --about-gap: clamp(2.5rem, 6vw, 5.5rem);
  --about-cut: 14px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(7rem, 18vw, 11rem) 0 clamp(2.5rem, 6vw, 4.5rem);
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(58% 48% at 80% 10%, rgba(108, 76, 241, .22), transparent 70%),
    radial-gradient(42% 42% at 6% 92%, rgba(47, 191, 143, .12), transparent 70%);
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .07;
  background-image:
    linear-gradient(var(--line-ink) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-ink) 1px, transparent 1px);
  background-size: 68px 68px;
}
.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2rem, 5vw, 3.5rem);
}
.page-about .about-hero__kicker {
  margin: 1.5rem 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--moss-lift);
}
.page-about .about-hero__title {
  margin: .75rem 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.25rem, 7.6vw, 4.2rem);
  line-height: 1.05;
  letter-spacing: -.015em;
  color: var(--on-dark);
}
.page-about .about-hero__lead {
  margin: 0;
  max-width: 36rem;
  color: var(--on-dark-soft);
}
.page-about .anchors {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem 1.5rem;
  margin: clamp(2rem, 5vw, 3rem) 0 0;
  padding: 0;
  list-style: none;
}
.page-about .anchors li {
  display: flex;
  flex-direction: column;
  gap: .35rem;
  padding-top: .85rem;
  border-top: 1px solid var(--line-ink);
}
.page-about .anchors__num {
  font-size: clamp(1.5rem, 4.2vw, 2.1rem);
  line-height: 1;
  color: var(--violet-300);
}
.page-about .anchors__label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--on-dark-mute);
}

/* ---------- 页内章节索引 ---------- */
.page-about .about-index {
  background: var(--ink-800);
  border-top: 1px solid var(--line-ink);
  border-bottom: 1px solid var(--line-ink);
}
.page-about .about-index__inner {
  display: flex;
  gap: .5rem;
  overflow-x: auto;
  padding: .9rem 0;
  scrollbar-width: thin;
}
.page-about .about-index__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: baseline;
  gap: .45rem;
  padding: .45rem .8rem;
  font-size: 13px;
  text-decoration: none;
  color: var(--on-dark-soft);
  border: 1px solid var(--line-ink);
  clip-path: polygon(var(--cut-sm) 0, 100% 0, 100% calc(100% - var(--cut-sm)), calc(100% - var(--cut-sm)) 100%, 0 100%, 0 var(--cut-sm));
  transition: color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease);
}
.page-about .about-index__link .mono {
  font-size: 11px;
  color: var(--violet-300);
}
.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--on-dark);
  border-color: var(--violet-500);
  background: rgba(108, 76, 241, .14);
  outline: none;
}

/* ---------- 通用章节栅格 ---------- */
.page-about .about-sec {
  position: relative;
}
.page-about .about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.75rem, 4vw, 2.5rem);
}
.page-about .about-sec__meta {
  display: flex;
  flex-direction: column;
  gap: .75rem;
}
.page-about .about-sec__meta .chapter__num {
  font-size: clamp(1.6rem, 4vw, 2.1rem);
  line-height: 1;
  color: var(--clay);
}
.page-about .about-sec__meta .note {
  margin: 0;
  line-height: 1.7;
}
.page-about .about-sec--dark .about-sec__meta .chapter__num {
  color: var(--clay);
}
.page-about .about-sec__main > .h-section {
  margin: 0 0 1rem;
}
.page-about .about-sec__main > .body-copy {
  margin: 0 0 2rem;
  max-width: 40rem;
}
.page-about .about-sec__aside {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.page-about .about-sec__aside .vnote {
  margin: 0;
}

/* 斜线分隔 */
.page-about .slant {
  position: relative;
  height: clamp(26px, 4.5vw, 52px);
  background: var(--cream);
}
.page-about .slant::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(-24deg, var(--line-paper) 0 6px, transparent 6px 15px);
  -webkit-mask-image: linear-gradient(to right, transparent, #000 16%, #000 84%, transparent);
  mask-image: linear-gradient(to right, transparent, #000 16%, #000 84%, transparent);
}

/* ---------- 分工 ---------- */
.page-about .roster {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line-paper);
  border: 1px solid var(--line-paper);
}
.page-about .roster__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem 1.25rem;
  padding: 1.35rem 1.15rem;
  background: var(--cream-2);
}
.page-about .roster__count {
  font-size: clamp(1.6rem, 5vw, 2.2rem);
  line-height: 1;
  color: var(--clay);
}
.page-about .roster__text .h-sub {
  margin: 0 0 .5rem;
}
.page-about .roster__text p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--on-light-soft);
}

/* ---------- 方法论 ---------- */
.page-about .about-sec--dark .about-sec__main > .body-copy {
  color: var(--on-dark-soft);
}
.page-about .dims {
  display: grid;
  gap: 1.6rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .dims__item {
  padding: .2rem 0 .2rem 1.15rem;
  border-left: 1px solid var(--line-ink-strong);
}
.page-about .dims__num {
  display: block;
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--green);
}
.page-about .dims__item .h-sub {
  margin: .5rem 0 .55rem;
  color: var(--on-dark);
}
.page-about .dims__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--on-dark-soft);
}
.page-about .dims__hint {
  margin-top: .6rem;
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--violet-300);
}
.page-about .about-method-figure {
  margin-top: clamp(2.5rem, 6vw, 4rem);
}
.page-about .about-figure--cut {
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 44px), calc(100% - 44px) 100%, 0 100%);
}
.page-about .about-figure .figcaption {
  margin-top: .75rem;
}
.page-about .media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 时间轴 ---------- */
.page-about .about-axis {
  position: relative;
  overflow: hidden;
}
.page-about .about-axis__bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .13;
}
.page-about .about-axis__bg img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.page-about .about-axis__inner {
  position: relative;
  z-index: 1;
}
.page-about .about-axis__head {
  max-width: 42rem;
}
.page-about .about-axis__head .chapter__num {
  display: block;
  font-size: clamp(1.6rem, 4vw, 2.1rem);
  line-height: 1;
  color: var(--clay);
  margin-bottom: .75rem;
}
.page-about .about-axis__head .h-section {
  margin: 0 0 1rem;
}
.page-about .about-axis__lead {
  margin: 0;
}
.page-about .about-timeline {
  margin: clamp(2.25rem, 5vw, 3.25rem) 0 0;
  padding: 0 0 0 1.35rem;
  list-style: none;
}
.page-about .about-timeline .timeline__item {
  position: relative;
  padding: 0 0 2.25rem 1.35rem;
  border-left: 1px dashed var(--line-paper);
}
.page-about .about-timeline .timeline__item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}
.page-about .about-timeline .timeline__item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: .55rem;
  width: 9px;
  height: 9px;
  background: var(--clay);
  transform: rotate(45deg);
}
.page-about .about-timeline .timeline__item:last-child::before {
  background: var(--green);
}
.page-about .about-timeline .tag {
  display: inline-block;
  font-size: 11px;
  letter-spacing: .1em;
  margin-bottom: .6rem;
}
.page-about .about-timeline .h-sub {
  margin: 0 0 .55rem;
}
.page-about .about-timeline p {
  margin: 0;
  max-width: 38rem;
  font-size: 15px;
  line-height: 1.78;
  color: var(--on-light-soft);
}
.page-about .about-axis__more {
  margin: clamp(2rem, 5vw, 3rem) 0 0;
  max-width: 42rem;
  font-size: 15px;
  color: var(--on-light-soft);
}
.page-about .about-axis__more a {
  color: var(--violet-500);
  text-underline-offset: 3px;
}

/* ---------- 校核流程 ---------- */
.page-about .fixflow {
  display: grid;
  gap: 1.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .fixflow__step {
  padding: 0 0 0 1.15rem;
  border-left: 1px solid var(--line-ink-strong);
}
.page-about .fixflow__num {
  display: block;
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--violet-300);
}
.page-about .fixflow__step .h-sub {
  margin: .45rem 0 .45rem;
  color: var(--on-dark);
}
.page-about .fixflow__step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--on-dark-soft);
}

/* ---------- 责任边界折叠 ---------- */
.page-about .terms {
  display: grid;
  gap: 1px;
  background: var(--line-paper);
  border: 1px solid var(--line-paper);
}
.page-about .term {
  background: var(--cream);
}
.page-about .term__head {
  display: flex;
  align-items: center;
  gap: .9rem;
  width: 100%;
  padding: 1.1rem 1.15rem;
  background: none;
  border: 0;
  text-align: left;
  cursor: pointer;
  color: var(--slate);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 600;
  transition: background-color .2s var(--ease), color .2s var(--ease);
}
.page-about .term__head:hover,
.page-about .term__head:focus-visible {
  background: rgba(108, 76, 241, .07);
  outline: none;
}
.page-about .term__head:focus-visible {
  box-shadow: inset 0 0 0 2px var(--violet-500);
}
.page-about .term__num {
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--clay);
}
.page-about .term__label {
  flex: 1 1 auto;
}
.page-about .term__sign {
  position: relative;
  flex: 0 0 auto;
  width: 12px;
  height: 12px;
}
.page-about .term__sign::before,
.page-about .term__sign::after {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 12px;
  height: 1px;
  background: var(--clay);
  transition: transform .2s var(--ease);
}
.page-about .term__sign::after {
  transform: rotate(90deg);
}
.page-about .term__head[aria-expanded="true"] .term__sign::after {
  transform: rotate(0deg);
}
.page-about .term__panel {
  padding: 0 1.15rem 1.2rem 1.15rem;
}
.page-about .term__panel p {
  margin: 0;
  max-width: 38rem;
  font-size: 15px;
  line-height: 1.78;
  color: var(--on-light-soft);
}

/* ---------- 备案与联络 ---------- */
.page-about .about-contact__head {
  max-width: 40rem;
}
.page-about .about-contact__head .chapter__num {
  display: block;
  font-size: clamp(1.6rem, 4vw, 2.1rem);
  line-height: 1;
  color: var(--clay);
  margin-bottom: .75rem;
}
.page-about .about-contact__head .h-section {
  margin: 0 0 1rem;
}
.page-about .about-contact__lead {
  margin: 0;
  color: var(--on-dark-soft);
}
.page-about .contact-list {
  display: grid;
  gap: 1px;
  margin: clamp(2rem, 5vw, 3rem) 0 0;
  background: var(--line-ink);
  border: 1px solid var(--line-ink);
}
.page-about .contact-list__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: .5rem;
  padding: 1.15rem 1.1rem;
  background: var(--ink-900);
}
.page-about .contact-list dt {
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--moss-lift);
}
.page-about .contact-list dd {
  margin: 0;
}
.page-about .contact-list dd a,
.page-about .contact-list__value {
  font-size: 16px;
  line-height: 1.6;
  color: var(--on-dark);
  overflow-wrap: anywhere;
}
.page-about .contact-list dd a {
  text-decoration-color: var(--violet-500);
  text-underline-offset: 3px;
}
.page-about .contact-list dd a:hover {
  color: var(--violet-300);
}
.page-about .contact-list__note {
  margin: .5rem 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--on-dark-mute);
}
.page-about .about-contact__more {
  margin: clamp(2rem, 5vw, 3rem) 0 0;
  max-width: 42rem;
  font-size: 15px;
  color: var(--on-dark-soft);
}
.page-about .about-contact__more a {
  color: var(--violet-300);
  text-underline-offset: 3px;
}

/* ---------- 中屏 ---------- */
@media (min-width: 700px) {
  .page-about .dims {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.9rem 2.25rem;
  }
  .page-about .fixflow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.5rem;
  }
  .page-about .contact-list__row {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 1.25rem;
    align-items: start;
  }
  .page-about .anchors {
    gap: 1.5rem 2rem;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: 5fr 7fr;
    align-items: end;
    gap: clamp(2.5rem, 6vw, 5rem);
  }
  .page-about .about-grid {
    grid-template-columns: 3fr 6fr 3fr;
    gap: clamp(1.75rem, 3.2vw, 3rem);
    align-items: start;
  }
  .page-about .about-sec__meta {
    position: sticky;
    top: 6.5rem;
  }
  .page-about .about-sec__aside {
    padding-top: .35rem;
  }
  .page-about .about-method-figure {
    margin-top: clamp(3rem, 6vw, 4.5rem);
  }
  .page-about .about-timeline {
    padding-left: 0;
    max-width: 46rem;
  }
  .page-about .about-axis__head {
    max-width: 46rem;
  }
}

@media (min-width: 1200px) {
  .page-about .anchors {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 无障碍与动效偏好 ---------- */
.page-about .about-index__link:focus-visible,
.page-about .about-axis__more a:focus-visible,
.page-about .about-contact__more a:focus-visible,
.page-about .contact-list dd a:focus-visible {
  outline: 2px solid var(--violet-500);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__link,
  .page-about .term__head,
  .page-about .term__sign::before,
  .page-about .term__sign::after {
    transition: none;
  }
}
</｜｜DSML｜｜ parameter>
</invoke>
</｜｜DSML｜｜ calls>