.page-about {
  --about-ink-soft: #3F565C;
  --about-max: 660px;
}

.page-about .about-link {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid var(--c-signal);
  padding-bottom: 1px;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--c-signal-hi);
  border-bottom-color: var(--c-signal-hi);
}

.page-about a:focus-visible,
.page-about button:focus-visible,
.page-about summary:focus-visible {
  outline: 2px solid var(--c-signal);
  outline-offset: 3px;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  padding: clamp(104px, 15vw, 176px) 0 clamp(36px, 6vw, 64px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: 36px;
  margin-top: 26px;
}

.page-about .about-hero h1 {
  margin: 16px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(34px, 7vw, 74px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--c-paper);
  max-width: 14ch;
}

.page-about .about-hero__lead .lede {
  margin-top: 20px;
  max-width: 46ch;
}

.page-about .about-hero__meta {
  border-top: 2px solid var(--c-signal);
  padding-top: 6px;
}

.page-about .meta-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .meta-row__k {
  font-size: var(--fs-7);
  color: var(--c-mute);
  letter-spacing: .04em;
}

.page-about .meta-row__v {
  font-family: var(--font-mono);
  font-size: var(--fs-6);
  color: var(--c-paper);
  letter-spacing: .06em;
  text-align: right;
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    column-gap: clamp(32px, 6vw, 88px);
    align-items: end;
  }
}

/* ---------- 编号轴 + 正文骨架 ---------- */

.page-about .about-doc {
  padding-bottom: clamp(48px, 8vw, 120px);
}

.page-about .doc {
  display: block;
}

.page-about .axis {
  position: sticky;
  top: 82px;
  z-index: 3;
  padding: 8px 0 14px;
  background: linear-gradient(180deg, var(--c-deep) 72%, rgba(11, 31, 42, 0));
  margin-bottom: 8px;
}

.page-about .axis__label {
  display: none;
  margin: 0 0 12px;
  font-size: var(--fs-7);
  letter-spacing: .18em;
  color: var(--c-mute);
}

.page-about .axis__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 2px 2px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .axis__list::-webkit-scrollbar {
  display: none;
}

.page-about .axis__link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 14px;
  border: 2px solid var(--line);
  border-radius: var(--radius-pill);
  color: var(--c-mute);
  font-size: var(--fs-6);
  text-decoration: none;
  white-space: nowrap;
  transition: color .18s var(--ease), border-color .18s var(--ease), background-color .18s var(--ease);
}

.page-about .axis__link:hover,
.page-about .axis__link:focus-visible {
  color: var(--c-paper);
  border-color: var(--c-signal);
  background: var(--signal-soft);
}

.page-about .axis__num {
  font-family: var(--font-mono);
  font-size: var(--fs-7);
  letter-spacing: .1em;
  color: var(--c-gold);
  transition: color .18s var(--ease);
}

.page-about .doc:has(#sec-01:target) .axis__item:nth-child(1) .axis__link,
.page-about .doc:has(#sec-02:target) .axis__item:nth-child(2) .axis__link,
.page-about .doc:has(#sec-03:target) .axis__item:nth-child(3) .axis__link,
.page-about .doc:has(#sec-04:target) .axis__item:nth-child(4) .axis__link,
.page-about .doc:has(#sec-05:target) .axis__item:nth-child(5) .axis__link,
.page-about .doc:has(#sec-06:target) .axis__item:nth-child(6) .axis__link {
  color: var(--c-paper);
  border-color: var(--c-signal);
  background: var(--signal-soft);
}

.page-about .doc:has(#sec-01:target) .axis__item:nth-child(1) .axis__num,
.page-about .doc:has(#sec-02:target) .axis__item:nth-child(2) .axis__num,
.page-about .doc:has(#sec-03:target) .axis__item:nth-child(3) .axis__num,
.page-about .doc:has(#sec-04:target) .axis__item:nth-child(4) .axis__num,
.page-about .doc:has(#sec-05:target) .axis__item:nth-child(5) .axis__num,
.page-about .doc:has(#sec-06:target) .axis__item:nth-child(6) .axis__num {
  color: var(--c-signal);
}

@media (min-width: 1024px) {
  .page-about .doc {
    display: grid;
    grid-template-columns: 186px minmax(0, 1fr);
    column-gap: clamp(32px, 5vw, 76px);
    align-items: start;
  }

  .page-about .axis {
    top: 112px;
    padding: 0 0 0 2px;
    background: none;
    border-left: 1px solid var(--line);
    margin-bottom: 0;
  }

  .page-about .axis__label {
    display: block;
    padding-left: 14px;
  }

  .page-about .axis__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding: 0;
  }

  .page-about .axis__link {
    width: 100%;
    justify-content: flex-start;
    padding: 11px 10px 11px 14px;
    border: none;
    border-left: 2px solid transparent;
    border-radius: 0;
  }

  .page-about .axis__link:hover,
  .page-about .axis__link:focus-visible {
    border-left-color: var(--c-signal);
    background: var(--signal-soft);
  }

  .page-about .doc:has(#sec-01:target) .axis__item:nth-child(1) .axis__link,
  .page-about .doc:has(#sec-02:target) .axis__item:nth-child(2) .axis__link,
  .page-about .doc:has(#sec-03:target) .axis__item:nth-child(3) .axis__link,
  .page-about .doc:has(#sec-04:target) .axis__item:nth-child(4) .axis__link,
  .page-about .doc:has(#sec-05:target) .axis__item:nth-child(5) .axis__link,
  .page-about .doc:has(#sec-06:target) .axis__item:nth-child(6) .axis__link {
    border-color: transparent;
    border-left-color: var(--c-signal);
    border-radius: 0;
  }
}

/* ---------- 章节通用 ---------- */

.page-about .chapter {
  color: var(--c-paper);
  padding: clamp(34px, 5.5vw, 68px) 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: 118px;
}

.page-about .chapter:first-of-type {
  border-top: none;
}

.page-about .chapter--paper {
  background: var(--c-sand);
  color: var(--c-deep);
  border-top: none;
  border-radius: var(--radius-lg);
  padding: clamp(26px, 4.5vw, 52px);
  margin: clamp(10px, 2vw, 20px) 0;
}

.page-about .chapter__idx {
  margin: 0 0 10px;
  font-size: var(--fs-7);
  letter-spacing: .2em;
  color: var(--c-gold);
}

.page-about .chapter--paper .chapter__idx {
  color: var(--c-indigo);
}

.page-about .chapter__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(24px, 3.6vw, 40px);
  line-height: 1.18;
  letter-spacing: -0.02em;
  color: inherit;
  max-width: 24ch;
}

.page-about .chapter__note {
  margin: 14px 0 0;
  max-width: 54ch;
  font-size: var(--fs-5);
  line-height: 1.75;
  color: var(--c-mute);
}

.page-about .chapter--paper .chapter__note {
  color: var(--about-ink-soft);
}

.page-about .chapter__text {
  margin: 20px 0 0;
  max-width: var(--about-max);
  font-size: var(--fs-5);
  line-height: 1.75;
  color: inherit;
}

.page-about .chapter__grid {
  display: grid;
  gap: 26px;
  margin-top: 26px;
}

.page-about .chapter__banner {
  margin: 28px 0 0;
}

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

@media (min-width: 900px) {
  .page-about .chapter__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    column-gap: clamp(28px, 4vw, 56px);
    align-items: start;
  }

  .page-about .chapter__grid--media-first {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr);
  }
}

/* ---------- 时间线 ---------- */

.page-about .timeline {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  gap: 4px;
}

.page-about .timeline__item {
  display: grid;
  gap: 10px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
}

.page-about .timeline__item:last-child {
  padding-bottom: 0;
}

.page-about .timeline__pill {
  justify-self: start;
  display: inline-flex;
  align-items: center;
  padding: 7px 18px;
  border-radius: var(--radius-pill);
  background: var(--c-indigo);
  color: var(--c-paper);
  font-size: var(--fs-7);
  letter-spacing: .14em;
}

.page-about .timeline__title {
  margin: 0;
  font-family: var(--font-head);
  font-size: var(--fs-4);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--c-paper);
}

.page-about .timeline__body p {
  margin: 8px 0 0;
  max-width: 62ch;
  font-size: var(--fs-5);
  line-height: 1.75;
  color: var(--c-mute);
}

@media (min-width: 760px) {
  .page-about .timeline__item {
    grid-template-columns: 138px minmax(0, 1fr);
    column-gap: 26px;
    align-items: start;
  }

  .page-about .timeline__pill {
    margin-top: 4px;
  }
}

/* ---------- 编号示例 ---------- */

.page-about .letter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .letter-row__item {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 8px 14px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-pill);
  font-size: var(--fs-6);
  color: var(--c-paper);
}

.page-about .letter-row__k {
  font-family: var(--font-mono);
  font-size: var(--fs-7);
  letter-spacing: .12em;
  color: var(--c-signal);
}

.page-about .code-list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .code-list__item {
  display: grid;
  gap: 8px;
  padding: 18px 20px;
  border-radius: var(--radius-md);
  background: var(--c-green);
  border-left: 2px solid var(--c-gold);
}

.page-about .code-list__code {
  font-family: var(--font-mono);
  font-size: var(--fs-4);
  letter-spacing: .1em;
  color: var(--c-gold);
}

.page-about .code-list__desc {
  margin: 0;
  font-size: var(--fs-5);
  line-height: 1.7;
  color: var(--c-paper);
  max-width: 56ch;
}

@media (min-width: 700px) {
  .page-about .code-list__item {
    grid-template-columns: 128px minmax(0, 1fr);
    column-gap: 22px;
    align-items: baseline;
  }
}

/* ---------- 编辑规范 ---------- */

.page-about .rules {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .rules--more {
  margin-top: 10px;
}

.page-about .rule-card {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 16px 18px;
  border-radius: var(--radius-md);
  background: var(--c-paper);
  border-left: 2px solid var(--c-indigo);
}

.page-about .rule-card__n {
  font-size: var(--fs-7);
  letter-spacing: .1em;
  color: var(--c-indigo);
  padding-top: 3px;
}

.page-about .rule-card__t {
  margin: 0;
  font-size: var(--fs-5);
  line-height: 1.7;
  color: var(--c-deep);
}

.page-about .rules-more {
  margin-top: 14px;
}

.page-about .rules-more > summary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 11px 20px;
  border: 2px solid var(--c-deep);
  border-radius: var(--radius-pill);
  background: var(--c-deep);
  color: var(--c-paper);
  font-size: var(--fs-6);
  cursor: pointer;
  list-style: none;
  transition: background-color .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}

.page-about .rules-more > summary::-webkit-details-marker {
  display: none;
}

.page-about .rules-more > summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: var(--fs-5);
  line-height: 1;
}

.page-about .rules-more[open] > summary::after {
  content: "−";
}

.page-about .rules-more > summary:hover {
  background: var(--c-near);
  border-color: var(--c-near);
}

.page-about .rules-more[open] > summary {
  background: var(--c-signal);
  border-color: var(--c-signal);
  color: var(--c-deep);
}

/* ---------- 团队路径 ---------- */

.page-about .tree {
  list-style: none;
  margin: 24px 0 0;
  padding: 0 0 0 34px;
  display: grid;
  gap: 14px;
  position: relative;
}

.page-about .tree::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 16px;
  bottom: 16px;
  width: 2px;
  background: linear-gradient(180deg, var(--c-signal), var(--c-indigo) 72%, rgba(76, 74, 140, 0));
}

.page-about .tree__step {
  position: relative;
  padding: 15px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--panel);
}

.page-about .tree__step::before {
  content: "";
  position: absolute;
  left: -31px;
  top: 22px;
  width: 14px;
  height: 8px;
  border-radius: var(--radius-pill);
  border: 2px solid var(--c-signal);
  background: var(--c-deep);
}

.page-about .tree__k {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--font-head);
  font-size: var(--fs-5);
  font-weight: 700;
  color: var(--c-paper);
}

.page-about .tree__k .mono {
  font-size: var(--fs-7);
  letter-spacing: .12em;
  color: var(--c-gold);
}

.page-about .tree__d {
  margin: 8px 0 0;
  font-size: var(--fs-6);
  line-height: 1.7;
  color: var(--c-mute);
}

/* ---------- 更新节奏 ---------- */

.page-about .cadence {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .cadence__item {
  padding: 20px 22px;
  border-radius: var(--radius-md);
  background: var(--c-paper);
  border-left: 2px solid var(--c-indigo);
}

.page-about .cadence__cycle {
  margin: 0;
  font-size: var(--fs-7);
  letter-spacing: .12em;
  color: var(--c-indigo);
}

.page-about .cadence__title {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-size: var(--fs-4);
  font-weight: 700;
  color: var(--c-deep);
}

.page-about .cadence__desc {
  margin: 8px 0 0;
  font-size: var(--fs-6);
  line-height: 1.7;
  color: var(--about-ink-soft);
  max-width: 52ch;
}

@media (min-width: 880px) {
  .page-about .cadence {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .cadence__item--wide {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 150px minmax(0, 220px) minmax(0, 1fr);
    align-items: center;
    column-gap: 26px;
    border-left-width: 4px;
    border-left-color: var(--c-signal);
  }

  .page-about .cadence__item--wide .cadence__title {
    margin-top: 0;
  }

  .page-about .cadence__item--wide .cadence__desc {
    margin-top: 0;
  }
}

/* ---------- 取证与结尾 ---------- */

.page-about .chapter--final {
  border-top: 2px solid var(--line-strong);
}

.page-about .evidence {
  display: grid;
  gap: 12px;
  margin-top: 24px;
}

.page-about .evidence__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .evidence__k {
  margin: 0;
  min-width: 72px;
  font-size: var(--fs-6);
  color: var(--c-mute);
}

.page-about .next-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

@media (min-width: 900px) {
  .page-about .evidence {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 40px;
  }

  .page-about .next-links {
    gap: 16px;
  }
}
</final_jsx>