.page-about {
  --about-shell: 1240px;
  --about-gutter: clamp(16px, 4vw, 40px);
  --about-radius: 0;
  position: relative;
  color: var(--ink);
  background:
    radial-gradient(1200px 620px at 82% -8%, rgba(91, 63, 209, 0.32), transparent 62%),
    radial-gradient(900px 520px at 8% 22%, rgba(61, 242, 224, 0.06), transparent 60%),
    var(--bg);
  overflow-x: hidden;
}

.page-about .container {
  width: 100%;
  max-width: var(--about-shell);
  margin-inline: auto;
  padding-inline: var(--about-gutter);
}

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

/* 面包屑顶部留白 */
.page-about .breadcrumb {
  padding-top: clamp(18px, 3vw, 28px);
  margin-bottom: clamp(18px, 3vw, 28px);
}

/* ========== 首屏 ========== */
.page-about .about-hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 48px);
  align-items: center;
  padding-bottom: clamp(36px, 6vw, 72px);
}

.page-about .about-hero-copy {
  display: flex;
  flex-direction: column;
  gap: 18px;
  min-width: 0;
}

.page-about .kicker {
  align-self: flex-start;
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 6.2vw, 54px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  margin: 0;
}

.page-about .about-lede {
  font-family: var(--font-body);
  font-size: clamp(15px, 2vw, 18px);
  line-height: 1.8;
  color: var(--ink-dim);
  max-width: 38em;
  margin: 0;
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-hero-facts {
  list-style: none;
  margin: 6px 0 0;
  padding: 18px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 32px;
  border-top: 1px solid var(--line);
}

.page-about .about-hero-facts li {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-about .fact-num {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 3.4vw, 30px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-about .fact-label {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-dim);
}

.page-about .about-hero-media {
  width: 100%;
  margin: 0;
  aspect-ratio: 4 / 3;
}

/* ========== 主画布：索引 + 章节 ========== */
.page-about .about-canvas {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 48px);
  padding-top: clamp(28px, 4vw, 44px);
  padding-bottom: clamp(56px, 8vw, 96px);
  border-top: 1px solid var(--line);
}

.page-about .about-index {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
}

.page-about .about-index-label {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--ink-dim);
  margin: 0;
  text-transform: uppercase;
}

.page-about .about-index-list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-index-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--ink-dim);
  text-decoration: none;
  background: rgba(22, 34, 74, 0.55);
  border: 1px solid var(--line);
  white-space: nowrap;
  clip-path: var(--cut-sm);
  transition: color 0.2s var(--ease), background 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-index-link:hover,
.page-about .about-index-link:focus-visible {
  color: var(--ink);
  background: var(--panel);
  border-color: var(--line-strong);
}

.page-about .about-index-num {
  font-family: var(--font-data);
  font-size: 11px;
  color: var(--cyan);
  letter-spacing: 0.08em;
}

/* 章节主体 */
.page-about .about-chapters {
  display: flex;
  flex-direction: column;
  gap: clamp(40px, 6vw, 72px);
  min-width: 0;
}

.page-about .about-chapter {
  scroll-margin-top: calc(var(--header-h) + 20px);
  min-width: 0;
}

.page-about .chapter-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 14px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--line);
}

.page-about .chapter-num {
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--orange);
  flex-shrink: 0;
}

.page-about .chapter-head h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 3.6vw, 36px);
  line-height: 1.1;
  letter-spacing: -0.015em;
  margin: 0;
}

.page-about .body-copy {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-dim);
  max-width: 40em;
  margin: 0 0 1.1em;
}

.page-about .body-copy a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(61, 242, 224, 0.35);
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .body-copy a:hover,
.page-about .body-copy a:focus-visible {
  color: var(--ink);
  border-bottom-color: var(--ink);
}

/* ========== 内容路线 ========== */
.page-about .about-route {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-top: 26px;
  padding-left: 28px;
  border-left: 1px dashed var(--line-strong);
}

.page-about .route-stop {
  position: relative;
  padding: 20px 22px;
  background: linear-gradient(135deg, rgba(22, 34, 74, 0.9), rgba(16, 26, 61, 0.9));
  clip-path: var(--cut-sm);
  border-top: 1px solid var(--line);
}

.page-about .route-stop::before {
  content: "";
  position: absolute;
  left: -32px;
  top: 30px;
  width: 8px;
  height: 8px;
  background: var(--cyan);
  transform: rotate(45deg);
}

.page-about .route-step {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-about .route-stop h3 {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 900;
  letter-spacing: -0.01em;
  margin: 6px 0 8px;
  color: var(--ink);
}

.page-about .route-stop p {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-dim);
  margin: 0;
}

/* ========== 团队分工 ========== */
.page-about .about-team {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 32px);
}

.page-about .about-team-copy {
  min-width: 0;
}

.page-about .about-roles {
  list-style: none;
  margin: 4px 0 20px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-roles li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 14px;
  padding: 12px 2px;
  background: var(--bg);
}

.page-about .role-name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 15px;
  color: var(--ink);
  min-width: 84px;
  letter-spacing: -0.005em;
}

.page-about .role-desc {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-dim);
}

.page-about .about-team-media {
  width: 100%;
  margin: 0;
  aspect-ratio: 10 / 7;
}

/* ========== 覆盖与更新节奏 ========== */
.page-about .about-chapter--band {
  position: relative;
  padding: clamp(24px, 4vw, 36px) clamp(20px, 3.2vw, 34px);
  background:
    radial-gradient(560px 240px at 90% 0%, rgba(91, 63, 209, 0.35), transparent 70%),
    linear-gradient(140deg, var(--bg-band), var(--panel-deep));
  clip-path: var(--cut-lg);
}

.page-about .about-scale {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 28px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .scale-cell {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 16px 18px;
  background: rgba(7, 11, 31, 0.62);
  min-width: 0;
}

.page-about .scale-num {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 3.6vw, 32px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-about .scale-label {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--ink-dim);
  line-height: 1.5;
}

.page-about .about-coverage-tail {
  margin-top: 22px;
  margin-bottom: 0;
}

/* ========== 本地服务 ========== */
.page-about .about-local {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 36px);
  align-items: start;
}

.page-about .about-local-copy {
  min-width: 0;
}

.page-about .about-contact {
  margin: 6px 0 16px;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-contact-row {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 14px;
  align-items: baseline;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-contact-label {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-dim);
  margin: 0;
}

.page-about .about-contact-value {
  margin: 0;
  font-family: var(--font-data);
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink);
  word-break: break-word;
}

.page-about .about-contact-note {
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-dim);
  margin: 0;
  padding-left: 14px;
  border-left: 2px solid var(--violet);
}

.page-about .about-local-media {
  width: 100%;
  margin: 0;
  aspect-ratio: 3 / 2;
}

/* ========== 合作分段标签 ========== */
.page-about .segmented {
  margin-top: 22px;
  min-width: 0;
}

.page-about .segmented-panel {
  margin-top: 18px;
  padding: clamp(18px, 3vw, 26px);
  background: rgba(16, 26, 61, 0.7);
  border-top: 1px solid var(--line);
  clip-path: var(--cut-sm);
  min-width: 0;
}

.page-about .segmented-panel p {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-dim);
  max-width: 40em;
  margin: 0 0 14px;
}

.page-about .segmented-panel .btn {
  margin-top: 4px;
}

/* ========== 收尾 ========== */
.page-about .about-closer {
  padding: clamp(24px, 4vw, 36px) clamp(22px, 3.4vw, 36px);
  background: linear-gradient(120deg, rgba(255, 122, 47, 0.14), rgba(91, 63, 209, 0.22) 60%, transparent);
  border-top: 1px solid var(--line-strong);
  clip-path: var(--cut-lg);
}

.page-about .about-closer-kicker {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--orange);
  margin: 0 0 8px;
  text-transform: uppercase;
}

.page-about .about-closer h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 3.4vw, 30px);
  line-height: 1.12;
  letter-spacing: -0.015em;
  margin: 0 0 18px;
}

.page-about .about-closer-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ========== 平板 ========== */
@media (min-width: 720px) {
  .page-about .about-scale {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-route {
    flex-direction: row;
    padding-left: 0;
    padding-top: 28px;
    border-left: 0;
    border-top: 1px dashed var(--line-strong);
    gap: 16px;
  }

  .page-about .route-stop {
    flex: 1 1 0;
    padding: 20px 20px 22px;
  }

  .page-about .route-stop::before {
    left: 22px;
    top: -34px;
  }

  .page-about .about-contact-row {
    grid-template-columns: 108px 1fr;
  }
}

/* ========== 桌面 ========== */
@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: stretch;
    padding-bottom: clamp(48px, 6vw, 84px);
  }

  .page-about .about-hero-copy {
    padding-block: 12px;
    justify-content: center;
  }

  .page-about .about-hero-media {
    aspect-ratio: 4 / 5;
    align-self: stretch;
  }

  .page-about .about-canvas {
    grid-template-columns: 210px minmax(0, 1fr);
    gap: clamp(32px, 4.4vw, 64px);
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: calc(var(--header-h) + 24px);
    align-self: start;
  }

  .page-about .about-index-list {
    flex-direction: column;
    overflow-x: visible;
    padding-bottom: 0;
    gap: 4px;
  }

  .page-about .about-index-link {
    width: 100%;
    padding: 10px 12px;
    justify-content: flex-start;
    white-space: normal;
    text-align: left;
  }

  .page-about .about-team,
  .page-about .about-local {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    align-items: start;
  }

  .page-about .about-team-media,
  .page-about .about-local-media {
    aspect-ratio: 10 / 8;
  }

  .page-about .about-contact-row {
    grid-template-columns: 112px 1fr;
  }

  .page-about .about-scale {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }
}

/* ========== 宽屏微调 ========== */
@media (min-width: 1180px) {
  .page-about .about-canvas {
    grid-template-columns: 230px minmax(0, 1fr);
  }

  .page-about .about-chapter--band {
    padding-inline: 44px;
  }
}

/* ========== 减少动态 ========== */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-index-link,
  .page-about .body-copy a {
    transition: none;
  }
}
<<<END>>>