.page-about {
  --ab-rail: 92px;
  --ab-note: 244px;
  --ab-gap: clamp(18px, 3vw, 44px);
  background: var(--paper);
  color: var(--jet);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-mast {
  position: relative;
  overflow: hidden;
  padding: calc(var(--hdr-h) + 40px) 0 64px;
  border-bottom: 1px solid var(--line-strong);
  background: var(--paper);
}

.page-about .about-mast::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(90deg, rgba(27, 46, 61, .06) 0 1px, transparent 1px 80px),
    repeating-linear-gradient(180deg, rgba(27, 46, 61, .06) 0 1px, transparent 1px 80px);
  pointer-events: none;
}

.page-about .about-mast > .wrap {
  position: relative;
  z-index: 1;
}

.page-about .about-mast__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  margin-top: 26px;
  align-items: start;
}

.page-about .about-mast__rail {
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-family: var(--ff-mono);
  color: var(--channel);
}

.page-about .about-mast__rail-year {
  font-size: clamp(34px, 5vw, 46px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--channel);
}

.page-about .about-mast__rail-label {
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--channel);
}

.page-about .eyebrow {
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--maple);
  margin: 0 0 10px;
}

.page-about .about-mast__title {
  margin: 0;
  font-size: clamp(34px, 6vw, 78px);
  line-height: 1.02;
  font-weight: 900;
  letter-spacing: -.02em;
  color: var(--jet);
  max-width: 15ch;
}

.page-about .about-mast__lede {
  margin: 24px 0 0;
  max-width: 34em;
  font-size: 16.5px;
  line-height: 1.9;
  color: var(--ink);
}

.page-about .about-mast__lede::after {
  content: "";
  display: block;
  width: 56px;
  height: 3px;
  margin-top: 22px;
  background: var(--maple);
}

.page-about .about-mast__note {
  border-left: 2px solid var(--amber);
  padding-left: 16px;
}

.page-about .about-note__label {
  margin: 0 0 8px;
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--channel);
}

.page-about .about-note__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink);
}

/* ---------- 右侧章节导航 ---------- */
.page-about .about-jump {
  display: none;
}

/* ---------- 章节骨架 ---------- */
.page-about .about-chapter {
  padding-block: clamp(56px, 8vw, 104px);
  scroll-margin-top: calc(var(--hdr-h) + 16px);
}

.page-about .about-chapter--ash {
  background: var(--ash);
}

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

.page-about .about-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  align-items: start;
}

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

.page-about .about-chapter h2 {
  margin: 0 0 18px;
  font-size: clamp(25px, 3.4vw, 42px);
  line-height: 1.14;
  font-weight: 900;
  letter-spacing: -.015em;
  color: var(--jet);
}

.page-about .about-chapter--ink h2 {
  color: var(--paper);
}

.page-about .about-chapter p {
  margin: 0;
  font-size: 16.5px;
  line-height: 1.9;
  color: var(--ink);
}

.page-about .about-chapter p + p {
  margin-top: 16px;
}

.page-about .about-chapter--ink p {
  color: rgba(244, 241, 236, .84);
}

.page-about .about-row__note .about-term + .about-term {
  margin-top: 24px;
}

.page-about .about-term {
  border-top: 2px solid var(--amber);
  padding-top: 12px;
}

.page-about .about-term__label {
  margin: 0 0 8px;
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--channel);
}

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

.page-about .about-chapter--ink .about-note__label {
  color: var(--amber);
}

.page-about .about-chapter--ink .about-note__text {
  color: rgba(244, 241, 236, .8);
}

.page-about .about-chapter--ink .about-row__note {
  border-left-color: var(--amber);
}

.page-about .about-row__note .btn {
  margin-top: 14px;
}

/* ---------- 档案记录 ---------- */
.page-about .about-record {
  margin: 28px 0 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-strong);
  border: 1px solid var(--line-strong);
}

.page-about .about-record > div {
  background: var(--paper);
  padding: 16px 14px;
}

.page-about .about-chapter--ash .about-record > div {
  background: var(--ash);
}

.page-about .about-record dt {
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--channel);
}

.page-about .about-record dd {
  margin: 10px 0 0;
  font-family: var(--ff-mono);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--jet);
}

/* ---------- 配图 ---------- */
.page-about .about-figure {
  margin: 0 0 32px;
}

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

.page-about .about-caption {
  margin-top: 10px;
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: .06em;
  line-height: 1.7;
  color: var(--channel);
}

/* ---------- 时间轴 ---------- */
.page-about .about-track {
  position: relative;
  margin-top: 8px;
  padding-left: 26px;
  border-left: 1px solid rgba(46, 74, 98, .42);
}

.page-about .about-track__item {
  position: relative;
}

.page-about .about-track__head {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}

.page-about .about-track__trigger {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  width: 100%;
  text-align: left;
  background: none;
  border: 0;
  padding: 14px 0 16px;
  font: inherit;
  color: inherit;
  cursor: pointer;
}

.page-about .about-track__dot {
  position: absolute;
  left: -31px;
  top: 18px;
  width: 9px;
  height: 9px;
  border: 1px solid var(--channel);
  border-radius: 50%;
  background: var(--paper);
  transition: background-color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-about .about-track__item:hover .about-track__dot,
.page-about .about-track__item:focus-within .about-track__dot,
.page-about .about-track__item[data-open="true"] .about-track__dot {
  background: var(--amber);
  border-color: var(--amber);
}

.page-about .about-chapter--ash .about-track__dot {
  background: var(--ash);
}

.page-about .about-track__year {
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
  color: var(--channel);
}

.page-about .about-track__label {
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--jet);
}

.page-about .about-track__result {
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink);
}

.page-about .about-track .acc__body {
  padding: 0 0 18px 0;
}

.page-about .about-track .acc__body p {
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink);
}

/* ---------- 编审流程 ---------- */
.page-about .about-flow {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.page-about .about-flow__step {
  background: var(--paper);
  border: 1px solid var(--line-strong);
  border-top: 2px solid var(--channel);
  padding: 18px 18px 22px;
}

.page-about .about-flow__num {
  display: inline-block;
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--paper);
  background: var(--channel);
  padding: 3px 8px;
}

.page-about .about-flow__step h3 {
  margin: 12px 0 8px;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--jet);
}

.page-about .about-flow__step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink);
}

.page-about .about-afterflow {
  margin-top: 24px !important;
  font-size: 15px !important;
  line-height: 1.9 !important;
}

/* ---------- 三步确认 ---------- */
.page-about .about-chapter--check {
  position: relative;
  background: var(--paper);
  overflow: hidden;
}

.page-about .about-chapter--check .wrap {
  position: relative;
  z-index: 1;
}

.page-about .about-verify {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line-strong);
  border: 1px solid var(--line-strong);
}

.page-about .about-verify__step {
  background: var(--paper);
  padding: 24px 20px 28px;
}

.page-about .about-verify__num {
  display: block;
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--amber);
  letter-spacing: .04em;
}

.page-about .about-verify__step h3 {
  margin: 12px 0 8px;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--jet);
}

.page-about .about-verify__step p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink);
}

.page-about .about-seal {
  position: absolute;
  right: -30px;
  bottom: -30px;
  width: 180px;
  height: auto;
  opacity: .1;
  pointer-events: none;
  z-index: 0;
}

/* ---------- 栏目台账 ---------- */
.page-about .about-ledger {
  margin-top: 28px;
  border: 1px solid var(--line-strong);
  background: var(--paper);
}

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

.page-about .about-ledger__row {
  border-bottom: 1px solid var(--line);
}

.page-about .about-ledger__row:last-child {
  border-bottom: 0;
}

.page-about .about-ledger__trigger {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  width: 100%;
  text-align: left;
  background: var(--paper);
  border: 0;
  padding: 16px 14px;
  font: inherit;
  color: inherit;
  cursor: pointer;
}

.page-about .about-ledger__row:nth-child(even) .about-ledger__trigger {
  background: var(--ash);
}

.page-about .about-ledger__cell {
  display: block;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--ink);
}

.page-about .about-ledger__cell strong {
  color: var(--jet);
  font-size: 16px;
}

.page-about .about-ledger__panel-title {
  margin: 0 0 10px;
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--channel);
}

.page-about .about-ledger__panel-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .about-ledger__panel-list li {
  position: relative;
  padding-left: 16px;
  font-family: var(--ff-mono);
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink);
}

.page-about .about-ledger__panel-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 7px;
  height: 1px;
  background: var(--amber);
}

.page-about .about-ledger .acc__body {
  padding: 0 14px 18px;
  background: var(--paper);
}

.page-about .about-ledger__row:nth-child(even) .acc__body {
  background: var(--ash);
}

/* ---------- 地区与服务 ---------- */
.page-about .about-region-text {
  max-width: 34em;
}

.page-about .about-contact {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  border-top: 1px solid rgba(244, 241, 236, .18);
}

.page-about .about-contact li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(244, 241, 236, .18);
}

.page-about .about-contact__k {
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--amber);
}

.page-about .about-contact__v {
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--paper);
  word-break: break-word;
}

.page-about .about-region-note {
  margin-top: 24px !important;
  font-size: 14.5px !important;
  line-height: 1.85 !important;
  color: rgba(244, 241, 236, .78) !important;
}

.page-about .about-chapter--ink .btn-row {
  margin-top: 28px;
}

.page-about .about-chapter--ink .btn--quiet {
  color: var(--paper);
}

/* ---------- 按钮行 ---------- */
.page-about .btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

/* ---------- 桌面错位栏 ---------- */
@media (min-width: 900px) {
  .page-about .about-mast {
    padding-top: calc(var(--hdr-h) + 56px);
    padding-bottom: 88px;
  }

  .page-about .about-mast__grid {
    grid-template-columns: var(--ab-rail) minmax(0, 1fr) var(--ab-note);
    column-gap: var(--ab-gap);
    row-gap: 0;
  }

  .page-about .about-mast__rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    padding-top: 6px;
  }

  .page-about .about-mast__body {
    margin-top: 24px;
  }

  .page-about .about-mast__note {
    margin-top: 48px;
  }

  .page-about .about-row {
    grid-template-columns: var(--ab-rail) minmax(0, 1fr) var(--ab-note);
    column-gap: var(--ab-gap);
    row-gap: 0;
  }

  .page-about .about-row__main {
    margin-top: 24px;
  }

  .page-about .about-row__note {
    margin-top: 48px;
  }

  .page-about .about-record {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-track__trigger {
    grid-template-columns: 84px minmax(0, 1fr) minmax(0, .95fr);
    column-gap: 22px;
    align-items: baseline;
  }

  .page-about .about-track__year {
    font-size: 32px;
  }

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

  .page-about .about-seal {
    right: 20px;
    bottom: 10px;
    width: 240px;
  }

  .page-about .about-contact li {
    grid-template-columns: 128px minmax(0, 1fr);
    gap: 16px;
    align-items: baseline;
  }
}

@media (min-width: 820px) {
  .page-about .about-flow {
    flex-direction: row;
    gap: 0;
    align-items: flex-start;
  }

  .page-about .about-flow__step {
    flex: 1 1 0;
    min-width: 0;
  }

  .page-about .about-flow__step:nth-child(2) {
    margin-top: 20px;
  }

  .page-about .about-flow__step:nth-child(3) {
    margin-top: 40px;
  }

  .page-about .about-flow__step:nth-child(4) {
    margin-top: 60px;
  }

  .page-about .about-ledger__head {
    display: grid;
    grid-template-columns: 1.1fr 2.2fr 1fr 1.2fr;
    background: var(--channel);
  }

  .page-about .about-ledger__head span {
    padding: 11px 14px;
    font-family: var(--ff-mono);
    font-size: 11px;
    letter-spacing: .1em;
    color: var(--paper);
  }

  .page-about .about-ledger__trigger {
    grid-template-columns: 1.1fr 2.2fr 1fr 1.2fr;
    gap: 0;
    align-items: start;
    padding: 0;
  }

  .page-about .about-ledger__cell {
    padding: 14px;
    font-size: 14px;
  }
}

@media (max-width: 819px) {
  .page-about .about-ledger__cell::before {
    content: attr(data-label);
    display: block;
    margin-bottom: 2px;
    font-family: var(--ff-mono);
    font-size: 10px;
    letter-spacing: .12em;
    color: var(--channel);
  }
}

@media (min-width: 1280px) {
  .page-about .about-jump {
    display: block;
    position: fixed;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 15;
    font-family: var(--ff-mono);
    font-size: 11px;
    letter-spacing: .12em;
  }

  .page-about .about-jump__list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 12px;
  }

  .page-about .about-jump__link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 2px 0;
    color: var(--channel);
    text-decoration: none;
    transition: color 180ms var(--ease);
  }

  .page-about .about-jump__link::after {
    content: "";
    display: block;
    width: 14px;
    height: 1px;
    background: currentColor;
    transition: width 180ms var(--ease), background-color 180ms var(--ease);
  }

  .page-about .about-jump__link:hover,
  .page-about .about-jump__link:focus-visible {
    color: var(--jet);
  }

  .page-about .about-jump__link:hover::after,
  .page-about .about-jump__link:focus-visible::after {
    width: 26px;
    background: var(--amber);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-track__dot,
  .page-about .about-jump__link,
  .page-about .about-jump__link::after {
    transition: none;
  }
}
<<<END>>>