.page-about {
  background: var(--ink-900);
  color: var(--paper);
  overflow-x: hidden;
}

.page-about img {
  max-width: 100%;
  height: auto;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: 88px 0 56px;
  background:
    radial-gradient(120% 88% at 80% 4%, rgba(245, 197, 66, .15), transparent 58%),
    radial-gradient(95% 82% at 8% 96%, rgba(63, 143, 183, .14), transparent 62%),
    var(--ink-950);
  border-bottom: 1px solid var(--line-faint);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--line-faint) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line-faint) 1px, transparent 1px);
  background-size: 58px 58px;
  opacity: .55;
  -webkit-mask-image: radial-gradient(120% 96% at 50% 0%, #000 18%, transparent 76%);
  mask-image: radial-gradient(120% 96% at 50% 0%, #000 18%, transparent 76%);
  pointer-events: none;
}

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

.page-about .about-kicker {
  margin: 26px 0 0;
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--amber);
}

.page-about .about-title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 8.2vw, 88px);
  line-height: 1.04;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-about .about-title-hl {
  color: var(--amber-soft);
}

.page-about .about-lede {
  margin: 22px 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.9;
  color: rgba(244, 241, 232, .82);
}

.page-about .about-stats {
  list-style: none;
  margin: 36px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line-soft);
}

.page-about .about-stats li {
  padding: 16px 0 0;
  border-bottom: 1px solid var(--line-faint);
}

.page-about .about-stat-num {
  display: block;
  font-size: 30px;
  line-height: 1.1;
  color: var(--amber);
  font-weight: 700;
}

.page-about .about-stat-label {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  color: var(--mist);
  letter-spacing: .04em;
}

.page-about .about-jumps {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 30px;
}

.page-about .about-jump {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 8px 12px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  font-size: 13px;
  color: var(--mist);
  text-decoration: none;
  transition: color var(--ease), border-color var(--ease), background-color var(--ease);
}

.page-about .about-jump:hover,
.page-about .about-jump:focus-visible {
  color: var(--ink-950);
  background: var(--amber);
  border-color: var(--amber);
}

.page-about .about-jump-no {
  font-size: 11px;
  letter-spacing: .1em;
  opacity: .85;
}

/* ---------- 章节骨架 ---------- */

.page-about .about-chapter {
  padding: 56px 0;
  border-top: 1px solid var(--line-faint);
}

.page-about .about-chapter .grid-12 {
  row-gap: 28px;
}

.page-about .about-chapter-head,
.page-about .about-chapter-body,
.page-about .about-aside,
.page-about .about-figure,
.page-about .about-matrix,
.page-about .about-steps,
.page-about .about-rhythm,
.page-about .about-panel-grid,
.page-about .about-timeline,
.page-about .about-numbers {
  grid-column: 1 / -1;
}

.page-about .about-chapter-head .chapter-no {
  display: block;
  margin-bottom: 10px;
  font-size: 13px;
  letter-spacing: .2em;
}

.page-about .about-chapter-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 5.4vw, 44px);
  line-height: 1.1;
  letter-spacing: -.01em;
  color: var(--paper);
  max-width: 20ch;
}

.page-about .about-chapter-body {
  font-size: 16px;
  line-height: 1.88;
  color: rgba(244, 241, 232, .84);
}

.page-about .about-chapter-body p {
  margin: 0 0 1.05em;
}

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

.page-about .about-chapter-body a {
  color: var(--sea);
  text-decoration: none;
  border-bottom: 1px solid rgba(63, 143, 183, .5);
}

.page-about .about-chapter-body a:hover {
  color: var(--amber-soft);
  border-bottom-color: var(--amber-soft);
}

/* ---------- 侧栏块 ---------- */

.page-about .about-aside {
  padding: 20px;
  background: var(--ink-800);
  border-left: 2px solid var(--amber);
}

.page-about .about-aside h3 {
  margin: 0 0 10px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--amber-soft);
}

.page-about .about-aside p {
  margin: 0 0 .7em;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

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

.page-about .about-aside--stat {
  border-left-color: var(--brick);
}

.page-about .about-aside--stat h3 {
  color: var(--brick-soft);
}

.page-about .about-aside-big {
  font-size: 32px;
  line-height: 1.1;
  color: var(--paper) !important;
  font-weight: 700;
}

.page-about .about-aside--contact {
  border-left-color: var(--sea);
}

.page-about .about-aside--contact h3 {
  color: var(--sea);
}

.page-about .about-contact-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: baseline;
}

.page-about .about-contact-label {
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--line);
  color: var(--mist);
  min-width: 34px;
}

.page-about .about-contact-note {
  margin-top: 12px !important;
  padding-top: 12px;
  border-top: 1px solid var(--line-faint);
}

/* ---------- 图片与帧 ---------- */

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

.page-about .media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.page-about .about-figure--tall {
  max-width: 520px;
}

/* ---------- 星图 ---------- */

.page-about .about-constellation {
  background: transparent;
  border-left: 0;
  padding: 0;
}

.page-about .about-constellation svg {
  display: block;
  width: 100%;
  max-width: 260px;
  height: auto;
  color: var(--line);
}

.page-about .about-constellation .cn-dots {
  color: var(--amber);
}

.page-about .about-constellation-cap {
  margin: 12px 0 0;
  font-size: 10px;
  letter-spacing: .24em;
  color: var(--mist);
}

/* ---------- 矩阵表 ---------- */

.page-about .about-matrix-scroll {
  overflow-x: auto;
  border: 1px solid var(--line-soft);
}

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

.page-about .about-matrix caption {
  caption-side: top;
  text-align: left;
  padding: 14px 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--mist);
  background: var(--ink-880);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-matrix thead th {
  text-align: left;
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .14em;
  color: var(--mist);
  background: var(--ink-800);
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}

.page-about .about-matrix tbody th {
  text-align: left;
  padding: 15px 16px;
  font-weight: 700;
  color: var(--amber-soft);
  border-bottom: 1px solid var(--line-faint);
  white-space: nowrap;
}

.page-about .about-matrix tbody td {
  padding: 15px 16px;
  line-height: 1.75;
  color: rgba(244, 241, 232, .84);
  border-bottom: 1px solid var(--line-faint);
}

.page-about .about-matrix tbody tr:last-child th,
.page-about .about-matrix tbody tr:last-child td {
  border-bottom: 0;
}

.page-about .about-matrix tbody tr:hover th,
.page-about .about-matrix tbody tr:hover td {
  background: var(--ink-800);
}

/* ---------- 三审步骤 ---------- */

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

.page-about .about-step {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 14px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line-faint);
}

.page-about .about-step-no {
  font-size: 14px;
  letter-spacing: .1em;
  color: var(--brick-soft);
  padding-top: 3px;
}

.page-about .about-step-text h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
}

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

/* ---------- 周节拍 ---------- */

.page-about .about-rhythm {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  counter-reset: rhythm;
}

.page-about .about-rhythm li {
  padding: 14px 0 14px 0;
  border-top: 2px solid var(--line);
}

.page-about .about-rhythm li:first-child {
  border-top-color: var(--amber);
}

.page-about .about-rhythm-day {
  display: block;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--amber);
  margin-bottom: 6px;
}

.page-about .about-rhythm-do {
  display: block;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(244, 241, 232, .82);
}

/* ---------- 三个说明面板 ---------- */

.page-about .about-panel-grid {
  display: grid;
  gap: 16px;
}

.page-about .about-panel {
  padding: 20px;
  border-top: 1px solid var(--line);
}

.page-about .about-panel h3 {
  margin: 0 0 10px;
  font-size: 16px;
  font-weight: 700;
  color: var(--amber-soft);
}

.page-about .about-panel p {
  margin: 0;
  font-size: 14px;
  line-height: 1.82;
  color: var(--mist);
}

/* ---------- 时间线 ---------- */

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-tl-item {
  position: relative;
  padding: 0 0 26px 24px;
  border-left: 1px solid var(--line-soft);
}

.page-about .about-tl-item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 7px;
  width: 9px;
  height: 9px;
  background: var(--brick);
}

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

.page-about .about-tl-item:last-child::before {
  background: var(--amber);
}

.page-about .about-tl-year {
  display: block;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--brick-soft);
  margin-bottom: 6px;
}

.page-about .about-tl-item:last-child .about-tl-year {
  color: var(--amber);
}

.page-about .about-tl-item h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
}

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

/* ---------- 数字组 ---------- */

.page-about .about-numbers {
  margin: 8px 0 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-faint);
  border: 1px solid var(--line-faint);
}

.page-about .about-numbers > div {
  background: var(--ink-880);
  padding: 16px;
}

.page-about .about-numbers dt {
  font-size: 26px;
  line-height: 1.1;
  font-weight: 700;
  color: var(--amber);
}

.page-about .about-numbers dd {
  margin: 6px 0 0;
  font-size: 13px;
  color: var(--mist);
}

/* ---------- 收尾 CTA ---------- */

.page-about .about-cta {
  padding: 58px 0 68px;
  background:
    radial-gradient(110% 120% at 82% 0%, rgba(245, 197, 66, .16), transparent 60%),
    radial-gradient(90% 100% at 6% 100%, rgba(63, 143, 183, .16), transparent 62%),
    var(--ink-950);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-cta h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 5.6vw, 40px);
  line-height: 1.12;
  color: var(--paper);
}

.page-about .about-cta p {
  margin: 14px 0 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-cta-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* ---------- 平板及以上 ---------- */

@media (min-width: 700px) {
  .page-about .about-hero {
    padding: 104px 0 64px;
  }

  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0 24px;
  }

  .page-about .about-lede {
    font-size: 17px;
  }

  .page-about .about-chapter {
    padding: 68px 0;
  }

  .page-about .about-rhythm {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0 16px;
  }

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

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

/* ---------- 桌面错位网格 ---------- */

@media (min-width: 900px) {
  .page-about .about-chapter .grid-12 {
    row-gap: 36px;
  }

  .page-about .about-chapter-head {
    grid-column: 1 / span 7;
  }

  .page-about .about-chapter-body {
    grid-column: 1 / span 6;
  }

  .page-about .about-aside {
    grid-column: 8 / span 5;
    align-self: start;
  }

  .page-about .about-steps {
    grid-column: 1 / span 7;
  }

  .page-about .about-rhythm {
    grid-column: 1 / span 8;
  }

  .page-about .about-matrix,
  .page-about .about-figure,
  .page-about .about-panel-grid {
    grid-column: 1 / -1;
  }

  .page-about .about-numbers {
    grid-column: 7 / span 6;
  }

  .page-about .about-timeline {
    grid-column: 1 / span 8;
  }

  .page-about .about-chapter--flip .about-chapter-head {
    grid-column: 5 / span 8;
  }

  .page-about .about-chapter--flip .about-chapter-body {
    grid-column: 5 / span 7;
  }

  .page-about .about-chapter--flip .about-aside {
    grid-column: 1 / span 3;
    grid-row: 1 / span 2;
    align-self: start;
  }

  .page-about .about-chapter--flip .about-steps {
    grid-column: 5 / span 8;
  }

  .page-about .about-chapter--flip .about-rhythm {
    grid-column: 1 / -1;
  }

  .page-about .about-chapter--flip .about-panel-grid {
    grid-column: 1 / -1;
  }

  .page-about .about-constellation {
    grid-row: auto;
  }
}
<<<END>>>