.page-about {
  --about-line: rgba(242, 229, 201, 0.22);
  --about-line-soft: rgba(242, 229, 201, 0.1);
  --about-glow: rgba(56, 232, 209, 0.28);
}

/* ---------- 面包屑 ---------- */
.page-about .crumbs {
  padding-block: 1.1rem 0.4rem;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  gap: clamp(1.4rem, 4vw, 2.6rem);
  padding-block: clamp(1.2rem, 3vw, 2rem) clamp(2.2rem, 6vw, 4.4rem);
  border-bottom: 1px solid var(--about-line-soft);
}

.page-about .hero-copy h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 7.2vw, 3.7rem);
  line-height: 1.12;
  letter-spacing: -0.015em;
  margin: 0.6rem 0 1.1rem;
  color: var(--paper);
  text-wrap: balance;
}

.page-about .hero-lead {
  max-width: 54ch;
  color: var(--mist);
  font-size: clamp(1rem, 2.4vw, 1.15rem);
  line-height: 1.78;
  margin: 0;
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.5rem;
}

.page-about .hero-ticket {
  position: relative;
  padding: clamp(1.2rem, 3.5vw, 1.9rem);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(11, 17, 22, 0.18);
  box-shadow: var(--shadow-paper);
}

.page-about .hero-ticket::after {
  content: "";
  position: absolute;
  inset: 6px;
  border: 1px dashed rgba(11, 17, 22, 0.22);
  border-radius: calc(var(--radius-lg) - 6px);
  pointer-events: none;
}

.page-about .ticket-kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--brick);
}

.page-about .ticket-year {
  margin: 0.35rem 0 1.1rem;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(2.1rem, 8vw, 3.1rem);
  line-height: 1;
  letter-spacing: -0.04em;
  color: #16202a;
}

.page-about .ticket-dash {
  color: var(--brick);
  padding-inline: 0.1em;
}

.page-about .ticket-rows {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid rgba(11, 17, 22, 0.16);
}

.page-about .ticket-rows li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding: 0.58rem 0;
  border-bottom: 1px solid rgba(11, 17, 22, 0.12);
  font-size: 0.92rem;
  color: #2c3944;
}

.page-about .ticket-rows strong {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: #101a22;
}

.page-about .ticket-foot {
  margin: 0.95rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: rgba(11, 17, 22, 0.62);
}

/* ---------- 起源 ---------- */
.page-about .origin {
  display: grid;
  gap: clamp(1.6rem, 4vw, 2.6rem);
}

.page-about .origin-grid {
  display: grid;
  gap: clamp(1.4rem, 4vw, 2.4rem);
}

.page-about .origin-text h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.55rem, 4.6vw, 2.4rem);
  line-height: 1.25;
  color: var(--paper);
  margin: 0.55rem 0 1.1rem;
  text-wrap: balance;
}

.page-about .origin-text p {
  color: var(--mist);
  line-height: 1.82;
  margin: 0 0 0.95rem;
  max-width: 60ch;
}

.page-about .origin-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
}

.page-about .origin-facts li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.85rem;
  align-items: start;
  padding: 0.95rem 1rem;
  background: var(--panel);
  border-left: 3px solid var(--cyan);
  border-radius: var(--radius-sm);
}

.page-about .origin-facts li:nth-child(2) {
  border-left-color: var(--orange);
}

.page-about .origin-facts li:nth-child(3) {
  border-left-color: var(--blue);
}

.page-about .fact-no {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--yellow);
  padding-top: 0.15rem;
}

.page-about .origin-facts p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.72;
  color: var(--mist);
}

.page-about .origin-facts strong {
  display: block;
  color: var(--paper);
  font-size: 0.98rem;
  margin-bottom: 0.2rem;
}

.page-about .origin-figure {
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 30px 60px -46px rgba(0, 0, 0, 0.95);
}

.page-about .origin-figure img,
.page-about .review-figure img,
.page-about .annual-figure img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- 时间轴 ---------- */
.page-about .ledger-section {
  background:
    linear-gradient(180deg, rgba(19, 29, 38, 0.9) 0%, rgba(11, 17, 22, 1) 78%);
  border-block: 1px solid var(--about-line-soft);
}

.page-about .ledger-head h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 4.4vw, 2.3rem);
  line-height: 1.26;
  color: var(--paper);
  margin: 0.55rem 0 0.9rem;
}

.page-about .ledger-intro {
  max-width: 58ch;
  margin: 0 0 clamp(1.5rem, 4vw, 2.4rem);
  color: var(--mist);
  line-height: 1.78;
}

.page-about .ledger {
  list-style: none;
  margin: 0;
  padding: 0 0 0 clamp(1.1rem, 4vw, 2.1rem);
  position: relative;
}

.page-about .ledger::before {
  content: "";
  position: absolute;
  left: 0.28rem;
  top: 0.6rem;
  bottom: 1.2rem;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), var(--orange) 55%, rgba(90, 167, 255, 0.5));
  opacity: 0.7;
}

.page-about .ledger-item {
  position: relative;
  margin-bottom: 0.7rem;
}

.page-about .ledger-item::before {
  content: "";
  position: absolute;
  left: calc(-1 * clamp(1.1rem, 4vw, 2.1rem) + 0.28rem - 5px);
  top: 1.35rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--cyan);
  z-index: 1;
}

.page-about .ledger-item:nth-child(even)::before {
  border-color: var(--orange);
}

.page-about .ledger-item details {
  background: var(--panel);
  border: 1px solid var(--about-line-soft);
  border-radius: var(--radius);
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease);
}

.page-about .ledger-item details[open] {
  border-color: rgba(56, 232, 209, 0.42);
  background: var(--panel-soft);
}

.page-about .ledger-item summary {
  list-style: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 0.9rem;
  padding: 1rem clamp(0.9rem, 3vw, 1.4rem);
}

.page-about .ledger-item summary::-webkit-details-marker {
  display: none;
}

.page-about .ledger-year {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.35rem, 4.6vw, 1.9rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--cyan);
}

.page-about .ledger-item:nth-child(even) .ledger-year {
  color: var(--orange);
}

.page-about .ledger-label {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(0.95rem, 2.6vw, 1.12rem);
  color: var(--paper);
  line-height: 1.4;
}

.page-about .ledger-switch {
  width: 1.5rem;
  height: 1.5rem;
  border: 1px solid var(--about-line);
  border-radius: 50%;
  position: relative;
  flex-shrink: 0;
}

.page-about .ledger-switch::before,
.page-about .ledger-switch::after {
  content: "";
  position: absolute;
  background: var(--mist);
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}

.page-about .ledger-switch::before {
  width: 9px;
  height: 1px;
}

.page-about .ledger-switch::after {
  width: 1px;
  height: 9px;
  transition: opacity 0.2s var(--ease);
}

.page-about .ledger-item details[open] .ledger-switch {
  border-color: var(--cyan);
}

.page-about .ledger-item details[open] .ledger-switch::after {
  opacity: 0;
}

.page-about .ledger-body {
  padding: 0 clamp(0.9rem, 3vw, 1.4rem) 1.2rem;
}

.page-about .ledger-body p {
  margin: 0 0 0.85rem;
  color: var(--mist);
  line-height: 1.8;
  font-size: 0.96rem;
}

.page-about .tag-row {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 0;
  padding: 0;
}

/* ---------- 里程碑轨道 ---------- */
.page-about .milestone {
  padding-block: clamp(2rem, 6vw, 3.4rem);
}

.page-about .milestone-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 0.6rem 1.4rem;
  margin-bottom: 1.3rem;
}

.page-about .milestone-head h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.45rem, 4.2vw, 2.1rem);
  color: var(--paper);
  margin: 0.5rem 0 0;
}

.page-about .milestone-hint {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--yellow);
  opacity: 0.8;
}

.page-about .milestone-rail {
  list-style: none;
  margin: 0;
  padding: 0.3rem 0 1rem;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-about .mile-card {
  scroll-snap-align: start;
  min-width: 14.5rem;
  padding: 1.2rem 1.1rem;
  background: linear-gradient(160deg, rgba(26, 39, 51, 0.95), rgba(19, 29, 38, 0.95));
  border: 1px solid var(--about-line-soft);
  border-top: 3px solid var(--cyan);
  border-radius: var(--radius);
}

.page-about .mile-card:nth-child(3n + 2) {
  border-top-color: var(--orange);
}

.page-about .mile-card:nth-child(3n) {
  border-top-color: var(--blue);
}

.page-about .mile-num {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.9rem, 5.6vw, 2.6rem);
  line-height: 1;
  letter-spacing: -0.05em;
  color: var(--paper);
}

.page-about .mile-name {
  margin: 0.55rem 0 0.4rem;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--cyan);
}

.page-about .mile-card:nth-child(3n + 2) .mile-name {
  color: var(--orange);
}

.page-about .mile-card:nth-child(3n) .mile-name {
  color: var(--blue);
}

.page-about .mile-note {
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.66;
  color: var(--mist);
}

/* ---------- 审校 ---------- */
.page-about .review-grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.6rem);
}

.page-about .review-figure {
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  overflow: hidden;
  order: -1;
}

.page-about .review-main h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 4.4vw, 2.3rem);
  line-height: 1.26;
  color: var(--paper);
  margin: 0.55rem 0 0.9rem;
}

.page-about .review-lead {
  margin: 0 0 1.4rem;
  color: var(--mist);
  line-height: 1.8;
  max-width: 56ch;
}

.page-about .review-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.65rem;
  counter-reset: step;
}

.page-about .review-step {
  position: relative;
  padding: 1rem 1.1rem 1.05rem 1.15rem;
  background: var(--panel);
  border: 1px solid var(--about-line-soft);
  border-left: 3px solid rgba(242, 229, 201, 0.3);
  border-radius: var(--radius-sm);
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.page-about .review-step:hover,
.page-about .review-step:focus-within {
  border-left-color: var(--cyan);
  transform: translateX(4px);
  box-shadow: -6px 0 20px -14px var(--about-glow);
}

.page-about .step-no {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--orange);
}

.page-about .review-step h3 {
  margin: 0.3rem 0 0.4rem;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.05rem;
  color: var(--paper);
}

.page-about .review-step p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.76;
  color: var(--mist);
}

/* ---------- 河北内容网络 ---------- */
.page-about .hebei-section {
  background: linear-gradient(180deg, rgba(19, 29, 38, 0.85), rgba(11, 17, 22, 1));
  border-block: 1px solid var(--about-line-soft);
}

.page-about .hebei-head h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 4.4vw, 2.3rem);
  line-height: 1.26;
  color: var(--paper);
  margin: 0.55rem 0 0.9rem;
}

.page-about .hebei-lead {
  margin: 0 0 clamp(1.4rem, 4vw, 2rem);
  max-width: 62ch;
  color: var(--mist);
  line-height: 1.8;
}

.page-about .point-list {
  list-style: none;
  margin: 0 0 clamp(1.4rem, 4vw, 2rem);
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--about-line-soft);
  border: 1px solid var(--about-line-soft);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .point-item {
  display: grid;
  gap: 0.25rem;
  padding: 0.95rem 1.05rem;
  background: var(--ink);
}

.page-about .point-city {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.05rem;
  color: var(--cyan);
  letter-spacing: 0.02em;
}

.page-about .point-role {
  font-size: 0.88rem;
  line-height: 1.66;
  color: var(--mist);
}

.page-about .partner-band {
  display: grid;
  gap: 0.9rem;
  padding: clamp(1.1rem, 3.5vw, 1.6rem);
  background: var(--panel);
  border: 1px solid var(--about-line-soft);
  border-radius: var(--radius-lg);
}

.page-about .partner-cell {
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--about-line-soft);
}

.page-about .partner-num {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.7rem, 5.4vw, 2.3rem);
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--orange);
}

.page-about .partner-name {
  margin: 0.3rem 0 0;
  font-size: 0.9rem;
  color: var(--paper);
}

.page-about .partner-note {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.76;
  color: var(--mist);
}

/* ---------- 年度收藏册 ---------- */
.page-about .annual-card {
  display: grid;
  gap: clamp(1.2rem, 3.5vw, 2rem);
  padding: clamp(1.2rem, 4vw, 2.2rem);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-paper);
}

.page-about .annual-text h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.45rem, 4.2vw, 2.15rem);
  line-height: 1.26;
  margin: 0.5rem 0 0.9rem;
  color: #16202a;
  text-wrap: balance;
}

.page-about .annual-text > p {
  margin: 0 0 1.1rem;
  color: #37444f;
  line-height: 1.8;
  font-size: 0.96rem;
}

.page-about .annual-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.55rem;
}

.page-about .annual-list li {
  position: relative;
  padding-left: 1.1rem;
  font-size: 0.9rem;
  line-height: 1.7;
  color: #37444f;
}

.page-about .annual-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 7px;
  height: 7px;
  background: var(--brick);
  border-radius: 50%;
}

.page-about .annual-list strong {
  color: #101a22;
  margin-right: 0.35rem;
}

.page-about .annual-figure {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid rgba(11, 17, 22, 0.16);
}

/* ---------- 下一段路线 ---------- */
.page-about .next-head h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 4.4vw, 2.3rem);
  line-height: 1.26;
  color: var(--paper);
  margin: 0.55rem 0 0.8rem;
}

.page-about .next-lead {
  margin: 0 0 clamp(1.4rem, 4vw, 2rem);
  max-width: 56ch;
  color: var(--mist);
  line-height: 1.8;
}

.page-about .next-list {
  list-style: none;
  margin: 0 0 clamp(1.5rem, 4vw, 2.2rem);
  padding: 0;
  display: grid;
  gap: 0.8rem;
}

.page-about .next-card {
  position: relative;
  padding: 1.15rem 1.15rem 1.2rem;
  background: var(--panel);
  border: 1px solid var(--about-line-soft);
  border-radius: var(--radius);
  border-top: 2px solid rgba(242, 229, 201, 0.28);
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-about .next-card:hover {
  border-top-color: var(--cyan);
  transform: translateY(-3px);
}

.page-about .next-no {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--violet);
}

.page-about .next-card h3 {
  margin: 0.4rem 0 0.45rem;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.05rem;
  color: var(--paper);
}

.page-about .next-card p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.76;
  color: var(--mist);
}

.page-about .next-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  padding-bottom: clamp(1rem, 3vw, 1.6rem);
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-about .origin-grid {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: start;
  }

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

  .page-about .partner-band {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .partner-cell {
    border-bottom: none;
    border-right: 1px solid var(--about-line-soft);
    padding-bottom: 0;
    padding-right: 0.9rem;
  }

  .page-about .partner-cell:last-of-type {
    border-right: none;
  }

  .page-about .partner-note {
    grid-column: 1 / -1;
    padding-top: 0.9rem;
    border-top: 1px solid var(--about-line-soft);
  }

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

  .page-about .annual-card {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: center;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
    align-items: start;
    padding-block: clamp(1.6rem, 3vw, 2.4rem) clamp(3rem, 6vw, 5rem);
  }

  .page-about .hero-ticket {
    margin-top: 0.4rem;
  }

  .page-about .origin {
    grid-template-columns: minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 3rem);
  }

  .page-about .origin-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: clamp(2rem, 4vw, 3.4rem);
  }

  .page-about .ledger {
    padding-left: 3rem;
  }

  .page-about .ledger::before {
    left: 1.05rem;
  }

  .page-about .ledger-item::before {
    left: calc(-3rem + 1.05rem - 6px);
    width: 14px;
    height: 14px;
  }

  .page-about .ledger-item summary {
    grid-template-columns: 6.5rem 1fr auto;
    gap: 1.4rem;
  }

  .page-about .review-grid {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    align-items: start;
    gap: clamp(2rem, 4vw, 3.2rem);
  }

  .page-about .review-figure {
    position: sticky;
    top: 6rem;
    order: 0;
  }

  .page-about .point-list {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .mile-card {
    min-width: 17rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ledger-item details,
  .page-about .review-step,
  .page-about .next-card {
    transition: none;
  }

  .page-about .review-step:hover,
  .page-about .next-card:hover {
    transform: none;
  }
}
<<<PAGE_CSS_END>>>
</main>