.page-about {
  --about-index-w: 216px;
  --about-rule: var(--mist-wash);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background: var(--sand-light);
  padding: 26px 0 50px;
  border-bottom: 2px solid var(--mist-deep);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -74px;
  right: -92px;
  width: 262px;
  height: 262px;
  background: var(--mist-wash);
  transform: rotate(16deg);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  bottom: -112px;
  left: -84px;
  width: 224px;
  height: 224px;
  background: var(--sand-mid);
  transform: rotate(-12deg);
  pointer-events: none;
}

.page-about .about-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 32px;
}

.page-about .about-title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 750;
  font-size: clamp(30px, 6.4vw, 54px);
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--mist-deep);
}

.page-about .about-hero-lede {
  margin: 18px 0 0;
  font-family: var(--font-serif);
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.85;
  color: var(--ink);
  max-width: 46ch;
}

.page-about .about-hero-stats {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 14px 30px;
  margin: 28px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--sand-deep);
}

.page-about .about-hero-stats li {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 92px;
}

.page-about .about-stat-num {
  font-family: var(--font-mono);
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--mist-deep);
}

.page-about .about-stat-label {
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--mist-mid);
}

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

.page-about .about-hero-figure .figure-frame {
  border: 3px solid var(--mist-deep);
  box-shadow: var(--shadow-hard);
  background: var(--paper);
  overflow: hidden;
}

.page-about .about-hero-figure .figure-cap {
  margin: 12px 0 0;
  font-family: var(--font-serif);
  font-size: 13px;
  color: var(--mist-mid);
}

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

/* ---------- 主体：索引栏 + 内容流 ---------- */
.page-about .about-body {
  display: grid;
  gap: 30px;
  padding: 42px 0 66px;
}

.page-about .about-index {
  background: var(--sand-mid);
  border: 2px solid var(--mist-deep);
  box-shadow: var(--shadow-hard);
  padding: 16px 14px 18px;
}

.page-about .about-index-title {
  margin: 0 0 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--sand-deep);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--mist-deep);
}

.page-about .about-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .about-index-list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 9px;
  border-radius: 2px;
  text-decoration: none;
  font-size: 14.5px;
  color: var(--mist-deep);
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .about-index-list a:hover,
.page-about .about-index-list a:focus-visible {
  background: var(--signal);
  color: var(--paper);
  outline: none;
}

.page-about .about-index-num {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--mist-mid);
  transition: color 0.2s var(--ease);
}

.page-about .about-index-list a:hover .about-index-num,
.page-about .about-index-list a:focus-visible .about-index-num {
  color: var(--paper);
}

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

/* ---------- 章节通用 ---------- */
.page-about .about-section {
  padding: 30px 0 34px;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-section:first-child {
  border-top-color: var(--mist-deep);
  padding-top: 6px;
}

.page-about .about-flow .section-kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.12em;
  line-height: 1.4;
  color: var(--sand-deep);
}

.page-about .about-flow .section-title {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 3.6vw, 32px);
  line-height: 1.25;
  color: var(--mist-deep);
}

.page-about .about-flow .about-lede {
  margin: 16px 0 0;
  font-family: var(--font-serif);
  font-size: 16.5px;
  line-height: 1.9;
  color: var(--mist-deep);
  max-width: 60ch;
}

.page-about .about-flow p {
  margin: 14px 0 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink);
  max-width: 64ch;
}

.page-about .about-mark {
  margin: 22px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--sand-deep);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--mist-mid);
}

.page-about .about-figure {
  margin: 28px 0 0;
}

.page-about .about-figure .figure-frame {
  border: 2px solid var(--mist-light);
  background: var(--paper);
  overflow: hidden;
}

.page-about .about-figure .figure-cap {
  margin: 10px 0 0;
  font-family: var(--font-serif);
  font-size: 13px;
  color: var(--mist-mid);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 66px;
  top: 10px;
  bottom: 14px;
  width: 2px;
  background: var(--mist-wash);
}

.page-about .about-tl-item {
  position: relative;
  display: grid;
  grid-template-columns: 66px minmax(0, 1fr);
  gap: 24px;
  padding-bottom: 28px;
}

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

.page-about .about-tl-item::before {
  content: "";
  position: absolute;
  left: 61px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--signal);
  border: 2px solid var(--sand-light);
}

.page-about .about-tl-year {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.04em;
  color: var(--mist-mid);
  padding-top: 3px;
}

.page-about .about-tl-body h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--mist-deep);
}

.page-about .about-tl-body p {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--ink);
  max-width: 56ch;
}

/* ---------- 团队 ---------- */
.page-about .about-team-grid {
  display: grid;
  gap: 30px;
  margin-top: 26px;
}

.page-about .about-ring {
  display: block;
  width: 100%;
  max-width: 236px;
  height: auto;
  margin: 0 auto;
}

.page-about .about-ring-num {
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 600;
  fill: var(--mist-deep);
}

.page-about .about-ring-label {
  font-family: var(--font-body);
  font-size: 12px;
  fill: var(--mist-mid);
}

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

.page-about .about-team-list li {
  display: grid;
  grid-template-columns: 14px minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--mist-wash);
}

.page-about .about-team-list li:first-child {
  border-top: 1px solid var(--mist-wash);
}

.page-about .about-swatch {
  width: 14px;
  height: 14px;
  display: block;
}

.page-about .about-team-list li:nth-child(1) .about-swatch { background: var(--mist-deep); }
.page-about .about-team-list li:nth-child(2) .about-swatch { background: var(--mist-mid); }
.page-about .about-team-list li:nth-child(3) .about-swatch { background: var(--mist-light); }
.page-about .about-team-list li:nth-child(4) .about-swatch { background: var(--sand-deep); }

.page-about .about-team-role {
  font-size: 15.5px;
  font-weight: 600;
  color: var(--mist-deep);
}

.page-about .about-team-count {
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 600;
  color: var(--mist-deep);
}

.page-about .about-team-desc {
  grid-column: 2 / -1;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink);
}

/* ---------- 更新节奏 ---------- */
.page-about .about-rhythm {
  display: grid;
  gap: 2px;
  margin-top: 26px;
  background: var(--mist-wash);
  border: 2px solid var(--mist-deep);
}

.page-about .about-rhythm-item {
  background: var(--paper);
  padding: 20px 22px 22px;
}

.page-about .about-rhythm-cycle {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--signal);
}

.page-about .about-rhythm-item h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--mist-deep);
}

.page-about .about-rhythm-item p {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink);
}

/* ---------- 用户与路径 ---------- */
.page-about .about-coverage {
  display: grid;
  gap: 18px;
  margin-top: 26px;
  padding: 22px 24px;
  background: var(--mist-deep);
}

.page-about .about-coverage-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-coverage-num {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 600;
  color: var(--paper);
  letter-spacing: -0.01em;
}

.page-about .about-coverage-label {
  font-size: 13px;
  letter-spacing: 0.03em;
  color: var(--mist-wash);
}

.page-about .about-paths {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
}

.page-about .about-paths li {
  border-bottom: 1px solid var(--mist-wash);
}

.page-about .about-paths li:first-child {
  border-top: 1px solid var(--mist-wash);
}

.page-about .about-paths a {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 14px;
  padding: 16px 8px;
  text-decoration: none;
  color: var(--ink);
  transition: background 0.2s var(--ease);
}

.page-about .about-paths a:hover,
.page-about .about-paths a:focus-visible {
  background: var(--mist-wash);
  outline: none;
}

.page-about .about-path-num {
  font-family: var(--font-mono);
  font-size: 13.5px;
  font-weight: 600;
  color: var(--mist-light);
}

.page-about .about-path-text {
  font-size: 15.5px;
  line-height: 1.7;
}

.page-about .about-path-go {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--signal);
  white-space: nowrap;
}

/* ---------- 合作 ---------- */
.page-about .about-partner-stats {
  display: grid;
  gap: 0;
  margin-top: 26px;
  border: 2px solid var(--mist-deep);
  background: var(--paper);
}

.page-about .about-partner-item {
  padding: 24px 24px 26px;
  border-bottom: 1px solid var(--mist-wash);
}

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

.page-about .about-partner-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 34px;
  font-weight: 600;
  line-height: 1.1;
  color: var(--mist-deep);
}

.page-about .about-partner-label {
  display: block;
  margin-top: 6px;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--mist-mid);
}

.page-about .about-partner-item p {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink);
}

/* ---------- 口碑 ---------- */
.page-about .about-honors {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 22px;
}

.page-about .about-honors li {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 16px;
}

.page-about .about-honor-num {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--sand-deep);
  padding-top: 2px;
}

.page-about .about-honors h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 17.5px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--mist-deep);
}

.page-about .about-honors p {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink);
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  background: var(--mist-deep);
  padding: 46px 0 52px;
}

.page-about .about-cta-inner {
  display: grid;
  gap: 16px;
  justify-items: start;
}

.page-about .about-cta h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(22px, 3.8vw, 32px);
  font-weight: 700;
  line-height: 1.25;
  color: var(--paper);
}

.page-about .about-cta p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--mist-wash);
  max-width: 56ch;
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 8px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-coverage {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .about-partner-item {
    border-bottom: 0;
    border-right: 1px solid var(--mist-wash);
  }

  .page-about .about-partner-item:last-child {
    border-right: 0;
  }

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

@media (min-width: 760px) {
  .page-about .about-team-grid {
    grid-template-columns: 250px minmax(0, 1fr);
    align-items: center;
    gap: 36px;
  }

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

@media (min-width: 920px) {
  .page-about .about-hero {
    padding: 34px 0 62px;
  }

  .page-about .about-hero-inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 52px;
    align-items: center;
  }

  .page-about .about-hero-figure {
    transform: rotate(-1.2deg);
  }
}

@media (min-width: 1000px) {
  .page-about .about-body {
    grid-template-columns: var(--about-index-w) minmax(0, 1fr);
    gap: 52px;
    align-items: start;
    padding: 56px 0 80px;
  }

  .page-about .about-index {
    position: sticky;
    top: calc(var(--header-h) + 20px);
  }

  .page-about .about-section {
    padding: 36px 0 40px;
  }
}

@media (max-width: 999px) {
  .page-about .about-index-list {
    grid-template-columns: repeat(auto-fit, minmax(132px, 1fr));
  }
}

@media (max-width: 639px) {
  .page-about .about-timeline::before {
    display: none;
  }

  .page-about .about-tl-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
    padding-left: 18px;
  }

  .page-about .about-tl-item::before {
    left: 0;
    top: 7px;
  }

  .page-about .about-paths a {
    grid-template-columns: 30px minmax(0, 1fr);
    gap: 10px;
  }

  .page-about .about-path-go {
    grid-column: 2 / -1;
    margin-top: 4px;
  }

  .page-about .about-honors li {
    grid-template-columns: 30px minmax(0, 1fr);
    gap: 12px;
  }
}
<<<END>>>