.page-about {
  --about-rail-w: 236px;
  --about-gap-x: clamp(36px, 4.5vw, 76px);
  --about-cyan-soft: rgba(56, 224, 208, .08);
  --about-cyan-line: rgba(56, 224, 208, .30);
  --about-warm-soft: rgba(255, 138, 61, .07);
  padding-bottom: clamp(64px, 9vw, 128px);
}

/* ---------- 面包屑与首屏 ---------- */
.page-about .breadcrumb {
  padding-top: clamp(20px, 3vw, 34px);
  margin-bottom: 0;
}

.page-about .about-hero {
  position: relative;
  padding: clamp(22px, 3.6vw, 44px) 0 clamp(26px, 3.6vw, 48px);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--about-cyan-line), rgba(56, 224, 208, 0) 72%);
}

.page-about .about-hero__id {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--signal-cyan);
}

.page-about .about-hero h1 {
  font-family: var(--font-title);
  font-size: clamp(30px, 5.2vw, 56px);
  line-height: 1.12;
  letter-spacing: .032em;
  color: var(--paper-050);
  max-width: 20ch;
  margin: 14px 0 18px;
}

.page-about .about-hero .lead {
  max-width: 60ch;
  color: var(--steel-300);
  margin: 0;
}

.page-about .about-hero__meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 20px;
  margin: clamp(24px, 3vw, 38px) 0 0;
  padding: 0;
}

.page-about .hero-meta__item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-left: 14px;
  border-left: 2px solid var(--line-cyan);
}

.page-about .hero-meta__item dt {
  font-size: 12.5px;
  letter-spacing: .08em;
  color: var(--steel-300);
}

.page-about .hero-meta__item dd {
  margin: 0;
  font-family: var(--font-title);
  font-size: 17px;
  color: var(--paper-050);
}

@media (min-width: 760px) {
  .page-about .about-hero__meta {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 信号轴主体 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 40px;
  padding-top: clamp(34px, 4.6vw, 64px);
}

@media (min-width: 1000px) {
  .page-about .about-body {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: var(--about-gap-x);
    align-items: start;
  }
}

/* ---------- 左侧索引栏 ---------- */
.page-about .about-rail {
  display: grid;
  gap: 22px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .rail-block {
  min-width: 0;
}

.page-about .rail-title {
  margin: 0 0 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--steel-300);
}

.page-about .rail-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .rail-link {
  display: block;
  padding: 8px 10px;
  border-left: 2px solid transparent;
  border-radius: 0 var(--radius-s) var(--radius-s) 0;
  font-size: 14.5px;
  line-height: 1.5;
  color: var(--steel-300);
  text-decoration: none;
  transition: color .2s var(--ease), background-color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .rail-list--ver .rail-link {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
}

.page-about .rail-link:hover,
.page-about .rail-link:focus-visible {
  color: var(--paper-050);
  background: var(--about-cyan-soft);
}

.page-about .rail-link:focus-visible {
  outline: 2px solid var(--signal-cyan);
  outline-offset: 2px;
}

.page-about .rail-link.is-active {
  color: var(--signal-cyan);
  border-left-color: var(--signal-cyan);
  background: var(--about-cyan-soft);
}

@media (min-width: 620px) and (max-width: 999px) {
  .page-about .about-rail {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px 28px;
  }
}

@media (min-width: 1000px) {
  .page-about .about-rail {
    position: sticky;
    top: 106px;
    align-self: start;
    padding-bottom: 0;
    border-bottom: 0;
  }
}

/* ---------- 章节与扫描线 ---------- */
.page-about .about-main {
  min-width: 0;
}

.page-about .about-section {
  scroll-margin-top: 118px;
}

.page-about .scan-divider {
  margin: clamp(42px, 6vw, 78px) 0;
}

.page-about .sec-head {
  margin-bottom: clamp(20px, 2.6vw, 32px);
}

.page-about .about-section .section-title {
  font-size: clamp(23px, 3vw, 32px);
  line-height: 1.25;
  letter-spacing: .025em;
  margin: 10px 0 0;
  color: var(--paper-050);
}

.page-about .sec-head .lead {
  margin: 14px 0 0;
  max-width: 60ch;
  color: var(--steel-300);
}

.page-about .prose p + p {
  margin-top: 1em;
}

.page-about .sec-tail {
  margin: clamp(20px, 2.6vw, 30px) 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--line-cyan);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--steel-300);
}

.page-about .sec-tail a {
  color: var(--signal-cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-cyan);
}

.page-about .sec-tail a:hover,
.page-about .sec-tail a:focus-visible {
  color: var(--paper-050);
}

/* ---------- 三种查询口径 ---------- */
.page-about .scope-grid {
  border-top: 1px solid var(--line);
  margin-top: clamp(22px, 3vw, 34px);
}

.page-about .scope-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .scope-item__no {
  font-size: 15px;
}

.page-about .scope-item__title {
  margin: 0 0 8px;
  font-family: var(--font-title);
  font-size: 18px;
  letter-spacing: .02em;
  color: var(--paper-050);
}

.page-about .scope-item__body p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--steel-300);
}

.page-about .scope-item__hint {
  margin-top: 10px !important;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--signal-cyan);
}

@media (min-width: 700px) {
  .page-about .scope-item {
    grid-template-columns: 68px minmax(0, 1fr);
    gap: 0 22px;
    padding: 26px 0;
  }
}

/* ---------- 版本时间轴 ---------- */
.page-about .about-figure {
  margin: 0 0 clamp(28px, 3.6vw, 46px);
}

.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 22px;
  border-left: 1px solid var(--about-cyan-line);
  display: grid;
  gap: 30px;
}

.page-about .tl-node {
  position: relative;
  scroll-margin-top: 120px;
}

.page-about .tl-node__dot {
  position: absolute;
  left: -27px;
  top: 7px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--signal-deep);
  box-shadow: 0 0 0 4px rgba(15, 167, 155, .14);
}

.page-about .tl-node:last-child .tl-node__dot {
  background: var(--pulse-orange);
  box-shadow: 0 0 0 4px rgba(255, 138, 61, .16);
}

.page-about .tl-node__ver {
  font-size: 14px;
}

.page-about .tl-node__title {
  margin: 6px 0 8px;
  font-family: var(--font-title);
  font-size: 17px;
  letter-spacing: .02em;
  color: var(--paper-050);
}

.page-about .tl-node p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--steel-300);
  max-width: 40ch;
}

@media (min-width: 860px) {
  .page-about .timeline {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 0;
    padding: 0;
    border-left: 0;
    position: relative;
  }

  .page-about .timeline::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 4px;
    height: 1px;
    background: linear-gradient(90deg, var(--about-cyan-line), var(--about-cyan-line) 88%, rgba(255, 138, 61, .5));
  }

  .page-about .tl-node {
    padding: 0 22px 0 0;
  }

  .page-about .tl-node__dot {
    position: static;
    display: block;
    margin-bottom: 18px;
  }

  .page-about .tl-node p {
    max-width: none;
  }
}

/* ---------- 栏目分类对照 ---------- */
.page-about .tax-compare {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  margin-top: clamp(20px, 2.6vw, 30px);
}

.page-about .tax-col {
  padding: 20px 18px;
  border-radius: var(--radius-m);
  background: var(--space-800);
}

.page-about .tax-col--new {
  background: var(--space-700);
}

.page-about .tax-col__head {
  margin: 0 0 12px;
  padding-bottom: 9px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--steel-300);
}

.page-about .tax-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 3px;
}

.page-about .tax-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  padding: 9px 11px;
  border-radius: 10px;
  font-size: 14.5px;
  color: var(--steel-300);
}

.page-about .tax-item--new {
  color: var(--paper-050);
  background: var(--about-warm-soft);
}

.page-about .tax-item__tag {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .12em;
  color: var(--pulse-orange);
}

.page-about .tax-figure {
  margin: clamp(24px, 3vw, 36px) 0 0;
}

@media (min-width: 720px) {
  .page-about .tax-compare {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.22fr);
    gap: 28px;
  }

  .page-about .tax-col {
    padding: 24px 22px;
  }
}

/* ---------- 团队与审校 ---------- */
.page-about .team-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 3.4vw, 42px);
  margin-top: clamp(20px, 2.6vw, 30px);
}

.page-about .team-groups {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .team-groups__item {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 4px 14px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .team-groups__item .num {
  grid-row: 1 / span 2;
  font-size: 13px;
  padding-top: 3px;
}

.page-about .team-groups__item h3 {
  margin: 0;
  font-family: var(--font-title);
  font-size: 17px;
  letter-spacing: .02em;
  color: var(--paper-050);
}

.page-about .team-groups__item p {
  grid-column: 2;
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--steel-300);
}

.page-about .review-block {
  margin-top: clamp(30px, 4vw, 48px);
}

.page-about .review-block__title {
  margin: 0 0 20px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--steel-300);
}

.page-about .review-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 22px;
}

.page-about .review-step {
  max-width: 58ch;
  padding: 14px 0 14px 16px;
  border-left: 2px solid var(--line-cyan);
}

.page-about .review-step:nth-child(2) {
  margin-left: clamp(0px, 3vw, 42px);
}

.page-about .review-step:nth-child(3) {
  margin-left: clamp(0px, 6vw, 84px);
}

.page-about .review-step__no {
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--signal-cyan);
}

.page-about .review-step__name {
  margin: 6px 0 6px;
  font-family: var(--font-title);
  font-size: 16.5px;
  color: var(--paper-050);
}

.page-about .review-step p:last-child {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--steel-300);
}

.page-about .team-figure {
  margin: 0;
}

@media (min-width: 920px) {
  .page-about .team-layout {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    align-items: start;
  }
}

/* ---------- 地区与备案 ---------- */
.page-about .region-panel {
  margin-top: clamp(20px, 2.6vw, 30px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .region-panel__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 16px 0;
}

.page-about .region-panel__row + .region-panel__row {
  border-top: 1px solid var(--line-soft);
}

.page-about .region-panel__key {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--steel-300);
}

.page-about .region-panel__val {
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--paper-050);
}

@media (min-width: 700px) {
  .page-about .region-panel__row {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 0 24px;
    align-items: baseline;
  }

  .page-about .region-panel__key {
    padding-top: 3px;
  }
}

.page-about .region-cities {
  list-style: none;
  margin: clamp(22px, 2.8vw, 32px) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .region-cities li {
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  background: var(--space-700);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--signal-cyan);
}

/* ---------- 结尾入口索引 ---------- */
.page-about .about-next .section-title {
  margin-bottom: clamp(16px, 2.2vw, 26px);
}

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

.page-about .next-link {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 16px 4px;
  border-bottom: 1px solid var(--line-soft);
  text-decoration: none;
  transition: background-color .2s var(--ease), padding-left .2s var(--ease);
}

.page-about .next-link__label {
  font-family: var(--font-title);
  font-size: 17px;
  letter-spacing: .02em;
  color: var(--paper-050);
}

.page-about .next-link__desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--steel-300);
}

.page-about .next-link:hover,
.page-about .next-link:focus-visible {
  background: var(--about-cyan-soft);
  padding-left: 14px;
}

.page-about .next-link:hover .next-link__label,
.page-about .next-link:focus-visible .next-link__label {
  color: var(--signal-cyan);
}

.page-about .next-link:focus-visible {
  outline: 2px solid var(--signal-cyan);
  outline-offset: -2px;
}

@media (min-width: 720px) {
  .page-about .next-link {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 0 24px;
    align-items: baseline;
  }
}

/* ---------- 图片与文字安全 ---------- */
.page-about .media-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .prose,
.page-about .scope-item__body,
.page-about .next-link__desc {
  overflow-wrap: break-word;
}

@media (prefers-reduced-motion: reduce) {
  .page-about .rail-link,
  .page-about .next-link {
    transition: none;
  }
}
<<<END>>>