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

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 22px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-about .breadcrumb a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: var(--hair) solid var(--grid);
  padding-bottom: 1px;
  transition: color var(--ease-dur) var(--ease), border-color var(--ease-dur) var(--ease);
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: 44px 0 56px;
}

.page-about .about-hero .eyebrow {
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-hero .title-xl {
  margin: 16px 0 22px;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: clamp(30px, 7vw, 62px);
  line-height: 1.06;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-lead {
  max-width: 58ch;
  margin: 0;
  font-family: var(--font-serif);
  font-size: 15px;
  line-height: 1.85;
  color: var(--paper);
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 0 18px;
  margin: 40px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .fact {
  padding: 14px 0 0;
  border-top: var(--hair) solid var(--grid);
}

.page-about .fact-num {
  display: block;
  font-size: 22px;
  line-height: 1.1;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-about .fact-label {
  display: block;
  margin-top: 6px;
  font-family: var(--font-sans);
  font-size: 12px;
  line-height: 1.5;
  color: var(--mist);
}

/* ---------- 章节骨架 ---------- */
.page-about .chapter {
  padding: 64px 0 72px;
  border-top: var(--hair) solid var(--grid);
}

.page-about .chapter-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}

.page-about .chapter-num-col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .chapter-num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(56px, 12vw, 120px);
  line-height: 0.8;
  letter-spacing: -0.03em;
  color: var(--raise);
}

@supports (-webkit-text-stroke: 1px #000) {
  .page-about .chapter-num {
    color: transparent;
    -webkit-text-stroke: 1px #2F5B4D;
  }
}

.page-about .chapter-unit {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .section-index {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--cyan);
}

.page-about .chapter-main .title-lg {
  margin: 10px 0 20px;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: clamp(21px, 3.4vw, 30px);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .prose {
  max-width: 62ch;
  margin: 0 0 16px;
  font-family: var(--font-serif);
  font-size: 15px;
  line-height: 1.85;
  color: var(--paper);
}

.page-about .inline-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: var(--hair) solid var(--raise);
  transition: border-color var(--ease-dur) var(--ease);
}

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

/* ---------- 媒体 ---------- */
.page-about .media {
  margin: 0 0 26px;
  border: var(--hair) solid var(--grid);
  background: var(--panel);
  overflow: hidden;
}

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

.page-about .media-caption {
  padding: 10px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--mist);
  border-top: var(--hair) solid var(--grid);
}

/* ---------- 01 分工表 ---------- */
.page-about .role-table {
  margin-top: 28px;
  border-top: var(--hair) solid var(--grid);
}

.page-about .role-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 16px 0;
  border-bottom: var(--hair) solid var(--grid);
  transition: background-color var(--ease-dur) var(--ease);
}

.page-about .role-name {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--paper);
  transition: color var(--ease-dur) var(--ease);
}

.page-about .role-do {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
  transition: color var(--ease-dur) var(--ease);
}

.page-about .role-out {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--raise);
}

.page-about .role-row:hover,
.page-about .role-row:focus-within {
  background: var(--panel);
}

.page-about .role-row:hover .role-name,
.page-about .role-row:focus-within .role-name {
  color: var(--cyan);
}

.page-about .role-row:hover .role-do,
.page-about .role-row:focus-within .role-do {
  color: var(--paper);
}

.page-about .role-row:hover .role-out,
.page-about .role-row:focus-within .role-out {
  color: var(--cyan-soft);
}

/* ---------- 02 流程 ---------- */
.page-about .split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
}

.page-about .flow {
  list-style: none;
  margin: 22px 0 0;
  padding: 0 0 0 18px;
  border-left: var(--hair) solid var(--grid);
}

.page-about .flow-step {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 0 0 16px;
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--paper);
}

.page-about .flow-step::before {
  content: "";
  position: absolute;
  left: -18px;
  top: 0.62em;
  width: 10px;
  height: var(--hair);
  background: var(--cyan);
}

.page-about .flow-num {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about .flow-text {
  line-height: 1.6;
}

.page-about .field-list {
  margin: 0;
  display: grid;
  gap: 14px;
}

.page-about .field-item dt {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--cyan);
  margin-bottom: 4px;
}

.page-about .field-item dd {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 03 时间线 ---------- */
.page-about .timeline {
  display: flex;
  gap: 0;
  margin: 30px 0 0;
  padding: 0 0 10px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.page-about .timeline:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
}

.page-about .tl-item {
  position: relative;
  flex: 0 0 82%;
  margin-right: 18px;
  padding: 26px 8px 0 0;
  border-top: var(--hair) solid var(--grid);
  scroll-snap-align: start;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 1px;
  height: 16px;
  background: var(--cyan);
}

.page-about .tl-item::after {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 24px;
  height: 1px;
  background: var(--cyan);
}

.page-about .tl-year {
  display: block;
  font-size: 20px;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

.page-about .tl-title {
  margin: 8px 0 8px;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 800;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .tl-text {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 04 覆盖表 ---------- */
.page-about .data-table {
  width: 100%;
  margin: 26px 0 24px;
  border-collapse: collapse;
  font-family: var(--font-sans);
  font-size: 13px;
  text-align: left;
}

.page-about .data-table .table-caption {
  caption-side: top;
  padding: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mist);
  text-align: left;
}

.page-about .data-table th {
  padding: 10px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--mist);
  border-bottom: var(--hair) solid var(--grid);
  white-space: nowrap;
}

.page-about .data-table td {
  padding: 13px 10px;
  line-height: 1.6;
  color: var(--paper);
  border-bottom: var(--hair) solid var(--grid);
  vertical-align: top;
  transition: background-color var(--ease-dur) var(--ease);
}

.page-about .data-table td.num {
  color: var(--cyan);
  white-space: nowrap;
  font-size: 14px;
}

.page-about .data-table tbody tr:hover td {
  background: var(--panel);
}

/* ---------- 05 报告反转区块 ---------- */
.page-about .report {
  margin: 6px 0 28px;
  padding: 28px 20px;
  background: var(--paper-bg);
  color: var(--bg);
}

.page-about .report-kicker {
  margin: 0 0 8px;
  font-size: 10px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: #1F6B59;
}

.page-about .report-title {
  margin: 0 0 14px;
  font-family: var(--font-sans);
  font-size: clamp(19px, 2.8vw, 24px);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--bg);
}

.page-about .report .prose {
  color: #24413A;
}

.page-about .report .inline-link {
  color: #12705D;
  border-bottom-color: #9DBFb6;
}

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

.page-about .report-disclosure {
  margin-top: 18px;
  border-top: var(--hair) solid #C9DCD5;
  border-bottom: var(--hair) solid #C9DCD5;
}

.page-about .report-disclosure .disclosure-trigger {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 15px 0;
  border: 0;
  background: none;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 800;
  color: var(--bg);
  text-align: left;
  cursor: pointer;
}

.page-about .report-disclosure .disclosure-icon {
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: #12705D;
}

.page-about .report-disclosure .disclosure-inner {
  padding: 4px 0 20px;
}

.page-about .report-disclosure .field-item dt {
  color: #0F5C4C;
}

.page-about .report-disclosure .field-item dd {
  color: #2C4740;
}

/* ---------- 06 服务中心 ---------- */
.page-about .service-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
}

.page-about .service-panel {
  border: var(--hair) solid var(--grid);
  padding: 20px;
  background: var(--panel);
}

.page-about .service-list {
  margin: 6px 0 18px;
  padding: 0;
}

.page-about .service-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 3px;
  padding: 12px 0;
  border-bottom: var(--hair) solid var(--grid);
}

.page-about .service-item dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.page-about .service-item dd {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 14px;
  line-height: 1.7;
  color: var(--paper);
}

.page-about .service-item dd.mono {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

.page-about .about-links {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin: 36px 0 0;
  padding: 0;
  list-style: none;
  border-top: var(--hair) solid var(--grid);
}

.page-about .about-links li {
  border-bottom: var(--hair) solid var(--grid);
}

.page-about .about-links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 52px;
  padding: 14px 2px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 700;
  color: var(--paper);
  text-decoration: none;
  transition: color var(--ease-dur) var(--ease), padding-left var(--ease-dur) var(--ease);
}

.page-about .about-links .link-arrow {
  font-family: var(--font-mono);
  color: var(--cyan);
  transition: transform var(--ease-dur) var(--ease);
}

.page-about .about-links a:hover,
.page-about .about-links a:focus-visible {
  color: var(--cyan);
  padding-left: 10px;
}

.page-about .about-links a:hover .link-arrow,
.page-about .about-links a:focus-visible .link-arrow {
  transform: translateX(4px);
}

/* ---------- 断点 ---------- */
@media (min-width: 768px) {
  .page-about .about-hero {
    padding: 56px 0 72px;
  }

  .page-about .role-row {
    grid-template-columns: minmax(0, 3fr) minmax(0, 6fr) minmax(0, 3fr);
    align-items: baseline;
    gap: 20px;
    padding: 18px 10px;
  }

  .page-about .service-item {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    align-items: baseline;
    gap: 16px;
  }

  .page-about .about-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 28px;
  }

  .page-about .service-panel {
    padding: 26px;
  }
}

@media (min-width: 900px) {
  .page-about .chapter {
    padding: 88px 0 96px;
  }

  .page-about .chapter-grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: 48px;
  }

  .page-about .chapter-num-col {
    gap: 14px;
    padding-top: 4px;
  }

  .page-about .timeline {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 22px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .tl-item {
    flex: none;
    margin-right: 0;
  }

  .page-about .service-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
    gap: 32px;
  }

  .page-about .media {
    margin-bottom: 0;
  }

  .page-about .service-media.media {
    margin-bottom: 0;
  }

  .page-about .report {
    padding: 36px 32px;
  }

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

@media (min-width: 1180px) {
  .page-about .split {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 34px;
    align-items: start;
  }

  .page-about .split-media.media {
    margin-top: 4px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl-item,
  .page-about .about-links a,
  .page-about .link-arrow,
  .page-about .role-row,
  .page-about .data-table td {
    transition: none;
  }
}
<<<END>>>