.page-about {
  --about-cut: 32px;
  --about-rail: 88px;
  color: var(--ink);
  font-family: var(--font-sans);
  padding-bottom: 64px;
}

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

.page-about .breadcrumbs {
  padding: 20px 0 4px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--gap);
  padding: 24px 0 8px;
}

.page-about .about-hero-main {
  padding: 8px 0 4px;
}

.page-about .about-hero .page-title {
  font-size: clamp(30px, 7.4vw, 54px);
  line-height: 1.1;
  letter-spacing: -0.5px;
  font-weight: 800;
  margin: 12px 0 16px;
}

.page-about .about-hero .lede {
  font-size: 16px;
  line-height: 1.75;
  color: var(--slate);
  margin: 0;
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-about .about-hero-focus {
  position: relative;
  background: var(--indigo);
  color: var(--paper);
  padding: 24px 22px 28px;
  background-image: repeating-linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.05) 0 1px,
    transparent 1px 12px
  );
  clip-path: polygon(0 0, calc(100% - 44px) 0, 100% 44px, 100% 100%, 0 100%);
}

.page-about .about-hero-focus::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 4px;
  background: var(--orange);
}

.page-about .focus-label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.72);
}

.page-about .focus-stats {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(76px, 1fr));
  gap: 14px;
}

.page-about .focus-stats li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-left: 10px;
  border-left: 1px solid rgba(255, 255, 255, 0.24);
}

.page-about .stat-num {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--paper);
  white-space: nowrap;
}

.page-about .stat-label {
  font-size: 12px;
  line-height: 1.4;
  color: rgba(255, 255, 255, 0.74);
}

.page-about .focus-note {
  margin: 20px 0 0;
  padding-top: 14px;
  border-top: 1px dashed rgba(255, 255, 255, 0.24);
  font-size: 13px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.8);
}

/* ---------- 通用区块 ---------- */
.page-about .section {
  padding: 44px 0;
}

.page-about .section-head {
  margin-bottom: var(--gap-lg);
}

.page-about .section-head .lede {
  color: var(--slate);
  font-size: 15px;
  line-height: 1.75;
  margin: 0;
  max-width: 62ch;
}

.page-about .about-h2 {
  font-size: 24px;
  line-height: 1.25;
  letter-spacing: -0.3px;
  font-weight: 800;
  color: var(--ink);
  margin: 8px 0 14px;
}

.page-about .about-h2--light {
  color: var(--paper);
  margin-top: 10px;
}

/* ---------- 02 我们是谁 ---------- */
.page-about .about-who {
  border-top: 1px solid var(--line);
}

.page-about .about-who-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--gap-lg);
}

.page-about .about-who-copy p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate);
  margin: 0 0 14px;
}

.page-about .about-who-points {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  align-content: start;
}

.page-about .about-who-points li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding: 14px 16px;
  background: var(--mist);
  border-left: 3px solid var(--blue);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.page-about .about-who-points li:nth-child(2) {
  border-left-color: var(--teal);
}

.page-about .about-who-points li:nth-child(3) {
  border-left-color: var(--wine);
}

.page-about .point-num {
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 700;
  color: var(--indigo);
  white-space: nowrap;
}

.page-about .point-text {
  font-size: 14px;
  line-height: 1.65;
  color: var(--slate);
}

/* ---------- 03 团队 ---------- */
.page-about .about-team-media {
  margin: 0 0 var(--gap-lg);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--mist);
  border: 1px solid var(--line);
}

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

.page-about .role-card {
  position: relative;
  padding: 22px 20px;
  border-radius: var(--radius);
  background: var(--paper);
  border: 1px solid var(--line);
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease),
    box-shadow 0.2s var(--ease);
}

.page-about .role-card:hover,
.page-about .role-card:focus-within {
  transform: translateY(-2px);
  box-shadow: var(--shadow-1);
}

.page-about .role-editor {
  background: var(--indigo);
  color: var(--paper);
  border-color: transparent;
  clip-path: polygon(
    0 0,
    calc(100% - var(--about-cut)) 0,
    100% var(--about-cut),
    100% 100%,
    0 100%
  );
}

.page-about .role-support {
  background: var(--teal);
  color: var(--paper);
  border-color: transparent;
}

.page-about .role-audit {
  background: var(--mist);
  color: var(--ink);
  border-color: var(--line);
}

.page-about .role-count {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  opacity: 0.72;
}

.page-about .role-title {
  margin: 0 0 10px;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.2px;
}

.page-about .role-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
}

.page-about .role-meta {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px solid rgba(16, 24, 40, 0.12);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  opacity: 0.78;
}

.page-about .role-editor .role-text,
.page-about .role-support .role-text {
  color: rgba(255, 255, 255, 0.84);
}

.page-about .role-editor .role-meta,
.page-about .role-support .role-meta {
  color: rgba(255, 255, 255, 0.76);
  border-top-color: rgba(255, 255, 255, 0.22);
}

/* ---------- 04 流程 ---------- */
.page-about .about-flow {
  background: var(--mist);
  border-radius: var(--radius);
}

.page-about .flow-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--gap);
  counter-reset: flow;
}

.page-about .flow-item {
  position: relative;
  padding: 20px 18px;
  background: var(--paper);
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  border-top: 3px solid var(--blue);
}

.page-about .flow-item:nth-child(2) {
  border-top-color: var(--indigo);
}

.page-about .flow-item:nth-child(3) {
  border-top-color: var(--teal);
}

.page-about .flow-item:nth-child(4) {
  border-top-color: var(--amber);
}

.page-about .flow-item:nth-child(5) {
  border-top-color: var(--wine);
}

.page-about .flow-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--slate);
  margin-bottom: 8px;
}

.page-about .flow-title {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .flow-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate);
}

/* ---------- 05 时间线 ---------- */
.page-about .timeline {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--gap-lg);
}

.page-about .timeline-rail {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: none;
}

.page-about .timeline-rail::-webkit-scrollbar {
  display: none;
}

.page-about .rail-year {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--slate);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  padding: 5px 12px;
  white-space: nowrap;
}

.page-about .rail-year--now {
  color: var(--paper);
  background: var(--blue);
  border-color: var(--blue);
}

.page-about .timeline-body {
  display: grid;
  gap: 26px;
}

.page-about .timeline-media {
  margin: 0 auto;
  width: 100%;
  max-width: 340px;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--mist);
  border: 1px solid var(--line);
}

.page-about .tl-item {
  position: relative;
  padding-left: 26px;
  border-left: 2px solid var(--line);
  transition: border-color 0.2s var(--ease);
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -10px;
  top: 6px;
  width: 16px;
  height: 16px;
  background: var(--blue);
  clip-path: polygon(0 0, 70% 0, 100% 30%, 100% 100%, 0 100%);
}

.page-about .tl-item:hover {
  border-left-color: var(--blue);
}

.page-about .tl-item:nth-of-type(even)::before {
  background: var(--teal);
}

.page-about .tl-item:nth-of-type(3)::before {
  background: var(--amber);
}

.page-about .tl-year {
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--blue);
}

.page-about .tl-title {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .tl-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--slate);
}

/* ---------- 06 合作 ---------- */
.page-about .partner-band {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--gap-lg);
  padding: 28px 20px;
  background: var(--indigo);
  color: var(--paper);
  border-radius: var(--radius);
  background-image: radial-gradient(
      circle at 88% 8%,
      rgba(255, 107, 53, 0.22) 0,
      transparent 45%
    ),
    repeating-linear-gradient(
      135deg,
      rgba(255, 255, 255, 0.045) 0 1px,
      transparent 1px 14px
    );
}

.page-about .partner-copy p {
  font-size: 15px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.84);
  margin: 0 0 14px;
}

.page-about .partner-band .index-tag {
  color: rgba(255, 255, 255, 0.68);
}

.page-about .partner-tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0 20px;
  padding: 0;
}

.page-about .partner-tags li {
  font-size: 12px;
  letter-spacing: 0.04em;
  padding: 5px 12px;
  border: 1px solid rgba(255, 255, 255, 0.32);
  border-radius: var(--radius-pill);
  color: rgba(255, 255, 255, 0.88);
}

.page-about .about-partner-media {
  margin: 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.18);
}

/* ---------- 结尾 ---------- */
.page-about .about-next {
  padding-top: 8px;
}

.page-about .about-next-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--gap);
  padding: 24px 20px;
  background: var(--mist);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.page-about .about-next-inner .about-h2 {
  font-size: 20px;
  margin: 0 0 10px;
}

.page-about .about-next-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--slate);
}

.page-about .about-next-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

/* ---------- 断点 ---------- */
@media (min-width: 620px) {
  .page-about .flow-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 880px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    gap: var(--gap-lg);
    padding: 44px 0 16px;
    align-items: stretch;
  }

  .page-about .about-hero-main {
    padding: 12px 0 0;
  }

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

  .page-about .about-h2 {
    font-size: 32px;
  }

  .page-about .about-who-grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .role-grid {
    grid-template-columns: minmax(0, 1.18fr) minmax(0, 1fr);
    grid-template-areas:
      "editor support"
      "editor audit";
    gap: var(--gap-lg);
  }

  .page-about .role-editor {
    grid-area: editor;
  }

  .page-about .role-support {
    grid-area: support;
  }

  .page-about .role-audit {
    grid-area: audit;
  }

  .page-about .about-flow {
    padding-top: 56px;
    padding-bottom: 56px;
  }

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

  .page-about .flow-item {
    grid-column: span 2;
  }

  .page-about .flow-item:nth-child(4) {
    grid-column: 2 / span 2;
  }

  .page-about .timeline {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: 44px;
  }

  .page-about .timeline-rail {
    position: sticky;
    top: 96px;
    align-self: start;
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding: 0 0 0 14px;
    border-left: 1px solid var(--line);
  }

  .page-about .rail-year {
    background: transparent;
    border: 0;
    border-radius: 0;
    padding: 8px 0;
    font-size: 15px;
    letter-spacing: 0.06em;
  }

  .page-about .rail-year--now {
    color: var(--blue);
    background: transparent;
    font-weight: 700;
  }

  .page-about .timeline-media {
    max-width: 380px;
    margin: 0 0 8px;
  }

  .page-about .tl-item:nth-of-type(even) {
    margin-left: 36px;
  }

  .page-about .partner-band {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 1fr);
    align-items: center;
    gap: 44px;
    padding: 40px 36px;
  }

  .page-about .about-next-inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    padding: 26px 28px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero .page-title {
    font-size: 56px;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .role-card,
  .page-about .tl-item {
    transition: none;
  }

  .page-about .role-card:hover,
  .page-about .role-card:focus-within {
    transform: none;
  }
}
<<<END>>