.page-about {
  --about-index-col: 176px;
  --about-stream-max: 780px;
  display: block;
  overflow-x: clip;
  background: linear-gradient(180deg, var(--ink) 0%, var(--ink-soft) 40%, var(--ink) 100%);
  padding-bottom: clamp(48px, 8vw, 96px);
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumbs-wrap {
  padding-top: clamp(84px, 11vw, 124px);
}

/* ---------- 首屏框景 ---------- */
.page-about .about-hero {
  margin-top: clamp(18px, 3vw, 32px);
}

.page-about .about-hero__frame {
  position: relative;
  padding: clamp(28px, 5vw, 56px) clamp(20px, 4.5vw, 56px);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(120% 150% at 88% -12%, rgba(200, 162, 74, 0.16), transparent 58%),
    radial-gradient(90% 120% at 2% 110%, rgba(30, 107, 91, 0.16), transparent 60%),
    linear-gradient(160deg, rgba(23, 26, 30, 0.96), rgba(13, 15, 18, 0.94));
  overflow: hidden;
}

.page-about .about-hero__frame::before {
  content: "";
  position: absolute;
  inset: 10px;
  border: 1px dashed rgba(241, 236, 227, 0.07);
  border-radius: calc(var(--radius-lg) - 10px);
  pointer-events: none;
}

.page-about .about-hero__frame::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 7px;
  background-image: repeating-linear-gradient(90deg, var(--gold-line) 0 1px, transparent 1px 18px);
  opacity: 0.55;
  pointer-events: none;
}

.page-about .about-hero__vertical {
  position: absolute;
  right: clamp(12px, 2.4vw, 24px);
  bottom: clamp(18px, 4vw, 40px);
  writing-mode: vertical-rl;
  font-size: 11px;
  letter-spacing: 0.34em;
  color: rgba(241, 236, 227, 0.22);
  pointer-events: none;
}

.page-about .about-hero__kicker {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 clamp(16px, 2.4vw, 24px);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--cool);
}

.page-about .about-hero__kicker .mono {
  color: var(--gold);
  letter-spacing: 0.24em;
}

.page-about .about-hero__kicker-sep {
  display: block;
  width: 22px;
  height: 1px;
  background: var(--line-strong);
}

.page-about .about-hero__title {
  margin: 0;
  max-width: 22em;
  font-family: var(--font-display);
  font-size: clamp(27px, 5.2vw, 50px);
  font-weight: 800;
  line-height: 1.24;
  letter-spacing: -0.02em;
  color: var(--cream);
}

.page-about .about-hero__em {
  color: var(--gold-light);
}

.page-about .about-hero__lede {
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  max-width: 46em;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.95;
  color: var(--cool);
}

.page-about .about-hero__ticks {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 30px;
  margin: clamp(24px, 3.4vw, 34px) 0 0;
  padding: clamp(16px, 2.2vw, 22px) 0 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .about-hero__ticks li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 13px;
  color: var(--cool);
}

.page-about .about-hero__ticks .mono {
  font-size: clamp(18px, 2.4vw, 22px);
  letter-spacing: 0.02em;
  color: var(--cream);
}

/* ---------- 布局 ---------- */
.page-about .about-layout {
  margin-top: clamp(52px, 8vw, 92px);
}

.page-about .about-index {
  display: none;
}

.page-about .about-stream {
  min-width: 0;
}

/* ---------- 索引栏 ---------- */
.page-about .about-index__label {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--cool);
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 1px solid var(--line);
}

.page-about .about-index__link {
  display: flex;
  gap: 9px;
  align-items: baseline;
  margin-left: -1px;
  padding: 9px 0 9px 14px;
  border-left: 1px solid transparent;
  color: var(--cool);
  font-size: 13.5px;
  line-height: 1.6;
  text-decoration: none;
  transition: color 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-about .about-index__num {
  flex: none;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--cool);
  opacity: 0.55;
  transition: color 0.24s var(--ease), opacity 0.24s var(--ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--cream);
  border-left-color: var(--gold);
}

.page-about .about-index__link:hover .about-index__num,
.page-about .about-index__link:focus-visible .about-index__num {
  color: var(--gold);
  opacity: 1;
}

/* ---------- 区块通用 ---------- */
.page-about .about-block {
  scroll-margin-top: 112px;
}

.page-about .about-rule {
  height: 1px;
  margin: clamp(38px, 6vw, 62px) 0;
  background-image: repeating-linear-gradient(90deg, var(--line-strong) 0 8px, transparent 8px 17px);
}

.page-about .about-block__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px 14px;
  margin-bottom: clamp(16px, 2.4vw, 24px);
}

.page-about .about-block__num {
  flex: none;
  padding: 4px 9px;
  border: 1px solid var(--gold-line);
  border-radius: var(--pill);
  font-size: 12px;
  line-height: 1;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.page-about .about-block__title {
  margin: 0;
  flex: 1 1 60%;
  font-family: var(--font-display);
  font-size: clamp(20px, 3vw, 29px);
  font-weight: 700;
  line-height: 1.38;
  letter-spacing: -0.015em;
  color: var(--cream);
}

.page-about .about-block__body {
  font-size: clamp(15px, 1.5vw, 16.5px);
  line-height: 2;
  color: rgba(241, 236, 227, 0.86);
}

.page-about .about-block__body p {
  margin: 0 0 16px;
}

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

.page-about .about-inline-link {
  color: var(--gold-light);
  text-decoration: none;
  border-bottom: 1px solid var(--gold-line);
  padding-bottom: 1px;
  transition: color 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  color: var(--cream);
  border-bottom-color: var(--gold);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: clamp(24px, 3.4vw, 34px) 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
}

.page-about .about-figure--narrow {
  max-width: 470px;
}

.page-about .about-figure__cap {
  margin: 12px 0 0;
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--cool);
}

/* ---------- 阶段刻度与卡片 ---------- */
.page-about .stage-rail {
  display: flex;
  gap: 8px;
  margin: clamp(20px, 3vw, 30px) 0 clamp(22px, 3.2vw, 32px);
  padding: 0 0 14px;
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  border-bottom: 1px solid var(--line);
}

.page-about .stage-rail li {
  flex: none;
  scroll-snap-align: start;
}

.page-about .stage-rail__node {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 15px;
  border: 1px solid var(--line-strong);
  border-radius: var(--pill);
  color: var(--cool);
  font-size: 13px;
  line-height: 1.4;
  white-space: nowrap;
  text-decoration: none;
  transition: color 0.24s var(--ease), border-color 0.24s var(--ease), background-color 0.24s var(--ease);
}

.page-about .stage-rail__node .mono {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-about .stage-rail__node:hover,
.page-about .stage-rail__node:focus-visible {
  color: var(--cream);
  border-color: var(--gold-line);
  background-color: rgba(200, 162, 74, 0.08);
}

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

.page-about .stage-card {
  position: relative;
  padding: 22px 22px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(23, 26, 30, 0.72);
  scroll-margin-top: 118px;
  transition: transform 0.26s var(--ease), border-color 0.26s var(--ease), background-color 0.26s var(--ease);
}

.page-about .stage-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 22px;
  width: 26px;
  height: 2px;
  border-radius: 2px;
  background: var(--gold);
  opacity: 0.5;
}

.page-about .stage-card:hover {
  transform: translateY(-3px);
  border-color: var(--line-strong);
  background: rgba(42, 47, 53, 0.62);
}

.page-about .stage-card:target {
  border-color: var(--gold-line);
  background: rgba(200, 162, 74, 0.07);
}

.page-about .stage-card__meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 10px 0 8px;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--moss);
}

.page-about .stage-card__title {
  margin: 0 0 10px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--cream);
}

.page-about .stage-card__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.9;
  color: var(--cool);
}

/* ---------- 数据条 ---------- */
.page-about .data-bars {
  display: grid;
  gap: 12px;
  margin: clamp(22px, 3vw, 30px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .data-bar {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(23, 26, 30, 0.7);
  transition: border-color 0.24s var(--ease), background-color 0.24s var(--ease);
  outline-offset: 3px;
}

.page-about .data-bar:hover,
.page-about .data-bar:focus-visible {
  border-color: var(--line-strong);
  background: rgba(42, 47, 53, 0.62);
}

.page-about .data-bar__value {
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.page-about .data-bar__num {
  font-size: clamp(23px, 3.4vw, 31px);
  line-height: 1.1;
  letter-spacing: 0.04em;
  color: var(--gold-light);
}

.page-about .data-bar__unit {
  font-size: 13px;
  color: var(--moss);
}

.page-about .data-bar__label {
  display: block;
  margin-top: 6px;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--cream);
}

.page-about .data-bar__note {
  display: block;
  margin-top: 8px;
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--cool);
}

/* ---------- 三级编号 ---------- */
.page-about .code-parts {
  display: grid;
  gap: 10px;
  margin: clamp(22px, 3vw, 28px) 0 0;
}

.page-about .code-part {
  padding: 14px 16px;
  border-left: 2px solid var(--forest);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: rgba(30, 107, 91, 0.1);
}

.page-about .code-part__key {
  display: block;
  margin-bottom: 6px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--moss);
}

.page-about .code-part__val {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--cream);
}

.page-about .search-note {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 10px;
  margin: clamp(18px, 2.4vw, 24px) 0 0;
  font-size: 13.5px;
  line-height: 1.9;
  color: var(--cool);
}

/* ---------- 站点信息表 ---------- */
.page-about .record-list {
  display: grid;
  margin: clamp(20px, 2.6vw, 26px) 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .record-list__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 18px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .record-list__key {
  flex: 0 0 92px;
  margin: 0;
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--cool);
}

.page-about .record-list__val {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--cream);
}

/* ---------- 出口区 ---------- */
.page-about .about-next {
  margin-top: clamp(48px, 7vw, 76px);
  padding: clamp(24px, 4vw, 40px);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(110% 130% at 6% 0%, rgba(200, 162, 74, 0.1), transparent 55%),
    linear-gradient(150deg, rgba(23, 26, 30, 0.94), rgba(13, 15, 18, 0.94));
}

.page-about .about-next__title {
  margin: 0 0 clamp(18px, 2.4vw, 24px);
  font-family: var(--font-display);
  font-size: clamp(18px, 2.4vw, 22px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--cream);
}

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

.page-about .about-next__card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  height: 100%;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(42, 47, 53, 0.3);
  text-decoration: none;
  transition: transform 0.26s var(--ease), border-color 0.26s var(--ease), background-color 0.26s var(--ease);
}

.page-about .about-next__card:hover,
.page-about .about-next__card:focus-visible {
  transform: translateY(-3px);
  border-color: var(--gold-line);
  background: rgba(200, 162, 74, 0.09);
}

.page-about .about-next__num {
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.page-about .about-next__name {
  font-size: 15.5px;
  font-weight: 700;
  color: var(--cream);
  line-height: 1.5;
}

.page-about .about-next__desc {
  font-size: 13px;
  line-height: 1.8;
  color: var(--cool);
}

/* ---------- 窄屏适配 ---------- */
@media (max-width: 640px) {
  .page-about .about-hero__vertical {
    display: none;
  }

  .page-about .about-hero__frame {
    border-radius: var(--radius-md);
  }

  .page-about .about-figure--narrow {
    max-width: 100%;
  }
}

@media (min-width: 640px) {
  .page-about .data-bars {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 720px) {
  .page-about .stage-track {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

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

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

@media (min-width: 900px) and (hover: hover) {
  .page-about .data-bar__note {
    max-height: 0;
    margin-top: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.3s var(--ease), opacity 0.3s var(--ease), margin-top 0.3s var(--ease);
  }

  .page-about .data-bar:hover .data-bar__note,
  .page-about .data-bar:focus-visible .data-bar__note,
  .page-about .data-bar:focus-within .data-bar__note {
    max-height: 130px;
    margin-top: 8px;
    opacity: 1;
  }
}

@media (min-width: 1024px) {
  .page-about .about-layout {
    display: grid;
    grid-template-columns: var(--about-index-col) minmax(0, 1fr);
    column-gap: clamp(32px, 5vw, 72px);
    align-items: start;
  }

  .page-about .about-index {
    display: block;
    position: sticky;
    top: 110px;
  }

  .page-about .about-stream {
    max-width: var(--about-stream-max);
  }
}
</｜｜DSML｜｜ parameter>
</｜｜DSML｜｜ invoke>
</output>