.page-about,
.page-about *,
.page-about *::before,
.page-about *::after { box-sizing: border-box; }

.page-about {
  --about-max: 1120px;
  position: relative;
  background: var(--jnh-night);
  color: var(--jnh-chalk);
  padding-bottom: 96px;
  overflow-x: hidden;
}

/* 双边刻度带 */
@media (min-width: 1024px) {
  .page-about::before,
  .page-about::after {
    content: "";
    position: fixed;
    top: calc(var(--jnh-header-h) + 8px);
    bottom: 0;
    width: 1px;
    background: repeating-linear-gradient(to bottom, var(--jnh-line-b) 0, var(--jnh-line-b) 1px, transparent 1px, transparent 14px);
    pointer-events: none;
    z-index: 3;
  }
  .page-about::before { left: 8px; }
  .page-about::after { right: 8px; }
}

/* 章节跳转刻度 */
.page-about .about-index { display: none; }

@media (min-width: 1480px) {
  .page-about .about-index {
    display: flex;
    flex-direction: column;
    gap: 4px;
    position: fixed;
    right: 22px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 6;
  }
}

.page-about .about-index__tick {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  padding: 5px 9px 5px 10px;
  border-right: 2px solid var(--jnh-line);
  text-decoration: none;
  color: var(--jnh-mute);
  transition: color var(--jnh-dur) var(--jnh-ease), border-color var(--jnh-dur) var(--jnh-ease);
}

.page-about .about-index__n {
  font-family: var(--jnh-font-num);
  font-size: 10px;
  letter-spacing: .1em;
  font-variant-numeric: tabular-nums;
}

.page-about .about-index__t {
  font-family: var(--jnh-font-body);
  font-size: 11px;
  letter-spacing: .04em;
  white-space: nowrap;
}

.page-about .about-index__tick:hover,
.page-about .about-index__tick:focus-visible {
  color: var(--jnh-lime);
  border-right-color: var(--jnh-lime);
}

/* ---------- 框景首屏 ---------- */
.page-about .about-hero {
  position: relative;
  z-index: 1;
  padding: 104px var(--jnh-gutter) 0;
}

@media (min-width: 900px) {
  .page-about .about-hero { padding-top: 128px; }
}

.page-about .about-hero__frame {
  position: relative;
  max-width: var(--about-max);
  margin: 0 auto;
  border: 1px solid var(--jnh-line-a);
  min-height: 340px;
  overflow: hidden;
  isolation: isolate;
}

.page-about .about-hero__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .38;
  z-index: 0;
  filter: saturate(.7);
}

.page-about .about-hero__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    radial-gradient(120% 110% at 18% 0%, rgba(11, 31, 22, .4), rgba(11, 31, 22, .95) 74%),
    linear-gradient(180deg, rgba(11, 31, 22, .55), rgba(11, 31, 22, .9));
  pointer-events: none;
}

.page-about .about-hero__frame::before {
  content: "";
  position: absolute;
  inset: 10px;
  border: 1px dashed var(--jnh-line-b);
  z-index: 2;
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 3;
  padding: 34px 20px 40px;
  max-width: 880px;
}

.page-about .about-hero .jnh-h1 {
  margin: 14px 0 18px;
  max-width: 20ch;
}

.page-about .about-hero .jnh-lead {
  max-width: 60ch;
  margin: 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--jnh-mute);
}

@media (min-width: 720px) {
  .page-about .about-hero__inner { padding: 48px 44px 56px; }
  .page-about .about-hero .jnh-lead { font-size: 17px; }
}

.page-about .about-hero__stats {
  max-width: var(--about-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border: 1px solid var(--jnh-line-a);
  border-top: 0;
  background: var(--jnh-paper);
}

.page-about .about-hero__stat {
  padding: 14px 16px;
  border-top: 1px solid var(--jnh-line-c);
  border-right: 1px solid var(--jnh-line-c);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-hero__stat:nth-child(2n) { border-right: 0; }

.page-about .about-hero__stat dt {
  font-family: var(--jnh-font-num);
  font-size: 10px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--jnh-data);
}

.page-about .about-hero__stat dd {
  margin: 0;
  font-family: var(--jnh-font-head);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--jnh-chalk);
}

@media (min-width: 760px) {
  .page-about .about-hero__stats { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .page-about .about-hero__stat { padding: 18px 20px; }
  .page-about .about-hero__stat:nth-child(2n) { border-right: 1px solid var(--jnh-line-c); }
  .page-about .about-hero__stat:nth-child(4n) { border-right: 0; }
}

/* ---------- 通用区块 ---------- */
.page-about .about-sec {
  position: relative;
  z-index: 1;
  max-width: var(--about-max);
  margin: 0 auto;
  padding: clamp(64px, 9vw, 116px) var(--jnh-gutter) 0;
}

.page-about .about-sec__head {
  position: relative;
  border-top: 1px solid var(--jnh-line-a);
  padding-top: 22px;
  margin-bottom: 34px;
}

.page-about .about-sec__head::before {
  content: "";
  position: absolute;
  left: 0;
  top: -1px;
  width: 68px;
  height: 3px;
  background: var(--jnh-lime);
}

.page-about .about-sec__head .jnh-h2 { margin: 8px 0 0; }

.page-about .about-sec__sub {
  margin: 12px 0 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--jnh-mute);
}

.page-about .about-sec .jnh-text {
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--jnh-mute);
}

/* ---------- 01 档案规模 ---------- */
.page-about .about-scale {
  display: grid;
  gap: 30px;
}

.page-about .about-scale__main .jnh-text + .jnh-text { margin-top: 18px; }

@media (min-width: 900px) {
  .page-about .about-scale {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 52px;
    align-items: start;
  }
}

.page-about .about-fact {
  border: 1px solid var(--jnh-line-a);
  border-left: 3px solid var(--jnh-data);
  background: var(--jnh-paper);
  padding: 16px 18px;
  margin-bottom: 16px;
}

.page-about .about-fact:last-child { margin-bottom: 0; }

.page-about .about-fact__k {
  margin: 0 0 8px;
  font-family: var(--jnh-font-num);
  font-size: 10px;
  letter-spacing: .14em;
  color: var(--jnh-data);
}

.page-about .about-fact__v {
  margin: 0 0 8px;
  font-family: var(--jnh-font-head);
  font-size: 22px;
  font-weight: 900;
  letter-spacing: -.01em;
  color: var(--jnh-chalk);
}

.page-about .about-fact__n {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--jnh-mute);
}

/* ---------- 02 五步流程 ---------- */
.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-flow__step {
  position: relative;
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 18px;
  padding-bottom: 38px;
}

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

.page-about .about-flow__step:not(:last-child)::before {
  content: "";
  position: absolute;
  left: 22px;
  top: 48px;
  bottom: 0;
  width: 1px;
  background: var(--jnh-line-a);
  transition: background var(--jnh-dur) var(--jnh-ease), width var(--jnh-dur) var(--jnh-ease);
}

.page-about .about-flow__step:not(:last-child):hover::before,
.page-about .about-flow__step:not(:last-child):focus-within::before {
  width: 2px;
  background: var(--jnh-lime);
}

.page-about .about-flow__marker {
  grid-column: 1;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border: 2px solid var(--jnh-line);
  background: var(--jnh-night);
  color: var(--jnh-data);
  font-family: var(--jnh-font-num);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .02em;
  font-variant-numeric: tabular-nums;
  position: relative;
  z-index: 1;
  transition: border-color var(--jnh-dur) var(--jnh-ease),
              color var(--jnh-dur) var(--jnh-ease),
              box-shadow var(--jnh-dur) var(--jnh-ease),
              transform var(--jnh-dur) var(--jnh-ease);
}

.page-about .about-flow__step:hover .about-flow__marker,
.page-about .about-flow__step:focus-within .about-flow__marker {
  border-color: var(--jnh-lime);
  color: var(--jnh-lime);
  transform: translateY(-2px);
  box-shadow: 5px 7px 0 var(--jnh-ink);
}

.page-about .about-flow__body {
  grid-column: 2;
  padding-top: 2px;
}

.page-about .about-flow__code {
  margin: 0 0 8px;
  font-family: var(--jnh-font-num);
  font-size: 10px;
  letter-spacing: .14em;
  color: var(--jnh-orange);
}

.page-about .about-flow__title {
  margin: 0 0 10px;
  font-family: var(--jnh-font-head);
  font-size: 19px;
  font-weight: 900;
  letter-spacing: -.01em;
  color: var(--jnh-chalk);
}

.page-about .about-flow__text {
  margin: 0 0 14px;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--jnh-mute);
}

.page-about .about-flow__out {
  display: inline-block;
  margin: 0;
  padding: 5px 10px;
  border: 1px solid var(--jnh-line-a);
  background: var(--jnh-paper);
  font-family: var(--jnh-font-num);
  font-size: 11px;
  letter-spacing: .04em;
  color: var(--jnh-data);
}

@media (min-width: 760px) {
  .page-about .about-flow__step {
    grid-template-columns: 56px minmax(0, 1fr);
    gap: 28px;
    padding-bottom: 46px;
  }
  .page-about .about-flow__marker { width: 56px; height: 56px; font-size: 14px; }
  .page-about .about-flow__step:not(:last-child)::before { left: 27px; top: 58px; }
  .page-about .about-flow__title { font-size: 22px; }
  .page-about .about-flow__text { font-size: 16px; }
}

/* ---------- 通栏图版 ---------- */
.page-about .about-plate {
  position: relative;
  z-index: 1;
  max-width: var(--about-max);
  margin: clamp(64px, 9vw, 108px) auto 0;
  padding: 0 var(--jnh-gutter);
}

.page-about .about-plate img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--jnh-line-a);
  filter: saturate(.82) contrast(1.04);
}

.page-about .about-plate figcaption {
  margin-top: 12px;
  max-width: 58ch;
  font-size: 12px;
  line-height: 1.7;
  color: var(--jnh-mute);
}

/* ---------- 03 口径版本 ---------- */
.page-about .about-vercode {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  gap: 10px;
  margin: 28px 0 14px;
}

.page-about .about-vercode__seg {
  flex: 1 1 130px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 16px;
  border: 1px solid var(--jnh-line-a);
  background: var(--jnh-paper);
}

.page-about .about-vercode__k {
  font-family: var(--jnh-font-num);
  font-size: 10px;
  letter-spacing: .14em;
  color: var(--jnh-data);
}

.page-about .about-vercode__v {
  font-family: var(--jnh-font-num);
  font-size: 20px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--jnh-chalk);
}

.page-about .about-vercode__plus {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 2px;
  font-family: var(--jnh-font-num);
  font-size: 17px;
  color: var(--jnh-line-a);
}

@media (max-width: 560px) {
  .page-about .about-vercode__plus { display: none; }
}

.page-about .about-ver__read {
  margin: 0 0 4px;
  font-size: 14px;
  color: var(--jnh-mute);
}

.page-about .about-ver__read .jnh-num {
  color: var(--jnh-lime);
  font-weight: 700;
}

.page-about .about-quote {
  position: relative;
  margin: 30px 0 0;
  padding: 22px 20px 22px 30px;
  border: 2px solid var(--jnh-line-a);
  background: var(--jnh-paper);
  box-shadow: var(--jnh-shadow-3);
}

.page-about .about-quote::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 6px;
  background: var(--jnh-lime);
}

.page-about .about-quote__text {
  margin: 0 0 14px;
  max-width: 64ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--jnh-chalk);
}

.page-about .about-quote__cite {
  display: block;
  font-style: normal;
  font-family: var(--jnh-font-num);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--jnh-orange);
}

.page-about .about-details { margin-top: 26px; }

.page-about .about-list {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 10px;
  font-size: 14px;
  line-height: 1.78;
  color: var(--jnh-mute);
}

.page-about .about-list li::marker { color: var(--jnh-lime); }

/* ---------- 04 整理边界 ---------- */
.page-about .about-records {
  display: grid;
  gap: 30px;
}

@media (min-width: 860px) {
  .page-about .about-records {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    gap: 48px;
    align-items: start;
  }
}

.page-about .about-records__media {
  margin: 0;
  position: relative;
}

.page-about .about-records__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border: 1px solid var(--jnh-line-a);
  filter: saturate(.68) contrast(1.06);
}

.page-about .about-records__media figcaption {
  margin-top: 12px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--jnh-mute);
}

@media (min-width: 860px) {
  .page-about .about-records__media { transform: rotate(-1.2deg); }
}

.page-about .about-records__text .jnh-text + .jnh-text { margin-top: 16px; }

/* ---------- 05 更新节奏 ---------- */
.page-about .about-table__cap {
  caption-side: top;
  text-align: left;
  padding: 0 0 12px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--jnh-mute);
}

.page-about .about-table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-about .about-table th,
.page-about .about-table td {
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--jnh-line-c);
  vertical-align: top;
}

.page-about .about-table thead th {
  font-family: var(--jnh-font-num);
  font-size: 10px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--jnh-data);
  border-bottom: 1px solid var(--jnh-line-a);
  white-space: nowrap;
}

.page-about .about-table tbody th {
  font-weight: 700;
  color: var(--jnh-chalk);
  white-space: nowrap;
}

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

.page-about .about-table tbody tr:nth-child(odd) { background: rgba(18, 46, 34, .5); }
.page-about .about-table tbody tr:hover { background: rgba(79, 169, 140, .1); }

.page-about .about-sec--cadence .jnh-note {
  margin: 16px 0 0;
  max-width: 62ch;
  font-size: 12px;
  line-height: 1.7;
  color: var(--jnh-mute);
}

/* ---------- 06 阅读入口 ---------- */
.page-about .about-paths {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

@media (min-width: 780px) {
  .page-about .about-paths {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
  }
}

.page-about .about-paths__item {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 20px 20px;
  border: 1px solid var(--jnh-line-a);
  background: var(--jnh-paper);
  transition: transform var(--jnh-dur) var(--jnh-ease),
              border-color var(--jnh-dur) var(--jnh-ease),
              box-shadow var(--jnh-dur) var(--jnh-ease);
}

.page-about .about-paths__item:hover,
.page-about .about-paths__item:focus-within {
  transform: translateY(-2px);
  border-color: var(--jnh-lime);
  box-shadow: 6px 8px 0 var(--jnh-ink);
}

.page-about .about-paths__k {
  margin: 0;
  font-family: var(--jnh-font-num);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--jnh-orange);
}

.page-about .about-paths__t {
  margin: 0;
  font-family: var(--jnh-font-head);
  font-size: 18px;
  font-weight: 900;
  letter-spacing: -.01em;
  color: var(--jnh-chalk);
}

.page-about .about-paths__d {
  margin: 0;
  flex: 1;
  font-size: 14px;
  line-height: 1.78;
  color: var(--jnh-mute);
}

.page-about .about-paths__link {
  align-self: flex-start;
  padding-bottom: 3px;
  border-bottom: 1px solid var(--jnh-line-a);
  font-family: var(--jnh-font-num);
  font-size: 11px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--jnh-lime);
  text-decoration: none;
  transition: border-color var(--jnh-dur) var(--jnh-ease);
}

.page-about .about-paths__link:hover,
.page-about .about-paths__link:focus-visible {
  border-bottom-color: var(--jnh-lime);
}

/* ---------- 收束 ---------- */
.page-about .about-coda {
  position: relative;
  z-index: 1;
  max-width: var(--about-max);
  margin: 0 auto;
  padding: clamp(72px, 10vw, 132px) var(--jnh-gutter) 0;
}

.page-about .about-coda__rule {
  height: 1px;
  margin-bottom: 26px;
  background: repeating-linear-gradient(to right, var(--jnh-line-a) 0, var(--jnh-line-a) 6px, transparent 6px, transparent 14px);
}

.page-about .about-coda__text {
  margin: 0;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--jnh-mute);
}

.page-about .about-coda__text a {
  color: var(--jnh-chalk);
  text-decoration: none;
  border-bottom: 1px solid var(--jnh-lime);
  padding-bottom: 1px;
  transition: color var(--jnh-dur) var(--jnh-ease);
}

.page-about .about-coda__text a:hover,
.page-about .about-coda__text a:focus-visible { color: var(--jnh-lime); }

/* ---------- 降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-flow__step:not(:last-child)::before,
  .page-about .about-flow__marker,
  .page-about .about-paths__item,
  .page-about .about-paths__link,
  .page-about .about-coda__text a,
  .page-about .about-index__tick {
    transition: none !important;
  }
  .page-about .about-flow__step:hover .about-flow__marker,
  .page-about .about-paths__item:hover,
  .page-about .about-paths__item:focus-within { transform: none; }
}
<<<END>>>