.page-about {
  background: var(--ink-void);
  color: var(--text);
  font-family: var(--font-body);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-block: 32px 10px;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset-inline: -12% -12%;
  top: -60px;
  height: 300px;
  background:
    radial-gradient(58% 100% at 12% 0%, rgba(79, 240, 220, 0.16), transparent 70%),
    radial-gradient(52% 92% at 88% 8%, rgba(255, 122, 26, 0.11), transparent 72%);
  pointer-events: none;
}

.page-about .about-hero > * {
  position: relative;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(34px, 8vw, 68px);
  line-height: 1.04;
  letter-spacing: -0.01em;
  margin: 18px 0 20px;
  max-width: 18ch;
}

.page-about .about-hero__lede {
  max-width: 62ch;
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-mute);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 22px;
  margin: 34px 0 0;
  padding-top: 24px;
  border-top: 1px solid var(--ink-line);
}

.page-about .about-hero__stats dt {
  margin: 0 0 6px;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--text-weak);
}

.page-about .about-hero__stats dd {
  margin: 0;
  font-size: 15px;
  color: var(--text-mute);
}

.page-about .about-num {
  font-family: var(--font-mono);
  font-size: 26px;
  color: var(--cyan);
  margin-right: 4px;
}

/* ---------- 主体骨架：左目录 + 右叙述 ---------- */
.page-about .about-body {
  display: grid;
  gap: 34px;
  padding-block: 44px 72px;
}

.page-about .about-index {
  border-top: 1px solid var(--ink-line);
  padding-top: 18px;
}

.page-about .about-index__caption {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-weak);
}

.page-about .about-index__list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
}

.page-about .about-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-mute);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--cyan);
}

.page-about .about-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cyan-deep);
}

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

/* ---------- 章节 ---------- */
.page-about .about-section {
  padding-block: 40px 44px;
  border-top: 1px solid var(--ink-line);
}

.page-about .about-section:first-child {
  border-top: 0;
  padding-top: 8px;
}

.page-about .about-section__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px 14px;
  align-items: baseline;
  margin-bottom: 20px;
}

.page-about .about-section__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-about .about-section__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(25px, 5vw, 40px);
  line-height: 1.12;
}

.page-about .about-lede {
  max-width: 60ch;
  margin: 0 0 8px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-mute);
}

.page-about .about-prose {
  max-width: 62ch;
}

.page-about .about-prose p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-mute);
}

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

.page-about .about-prose a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-deep);
}

/* ---------- 三块业务 ---------- */
.page-about .about-belts {
  display: grid;
  gap: 16px;
  margin-top: 26px;
}

.page-about .about-belt {
  position: relative;
  padding: 22px 20px 24px;
  border: 1px solid var(--ink-line);
  border-radius: var(--radius-md);
  background: linear-gradient(158deg, var(--ink-panel), var(--ink-navy));
}

.page-about .about-belt::after {
  content: "";
  position: absolute;
  left: 20px;
  right: 20px;
  top: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), transparent);
}

.page-about .about-belt__k {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--cyan);
}

.page-about .about-belt h3 {
  margin: 10px 0 10px;
  font-family: var(--font-display);
  font-size: 21px;
  line-height: 1.2;
}

.page-about .about-belt p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-mute);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 8px 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  object-fit: cover;
}

.page-about .about-figure__caption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-weak);
}

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

.page-about .about-figure--square img {
  aspect-ratio: 1 / 1;
}

.page-about .about-figure--square {
  margin-top: 30px;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  list-style: none;
  position: relative;
  margin: 10px 0 0;
  padding: 0 0 0 26px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 18px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--cyan-deep) 58%, var(--orange) 100%);
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: 28px;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 7px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(79, 240, 220, 0.14);
}

.page-about .about-timeline__item:last-child::before {
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 122, 26, 0.16);
}

.page-about .about-stage {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-about .about-timeline__item:last-child .about-stage {
  color: var(--orange-mist);
}

.page-about .about-timeline__item h3 {
  margin: 7px 0 8px;
  font-family: var(--font-display);
  font-size: 20px;
  line-height: 1.25;
}

.page-about .about-timeline__item p:last-child {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-mute);
}

/* ---------- 筛选与栏目卡片 ---------- */
.page-about .about-filter {
  margin: 22px 0 20px;
}

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

.page-about .about-col-card {
  background: var(--ink-panel);
  border: 1px solid var(--ink-line);
  border-radius: var(--radius-md);
  padding: 20px 20px 22px;
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-about .about-col-card:hover {
  border-color: var(--cyan-deep);
}

.page-about .about-col-card .card__title {
  margin: 12px 0 10px;
  font-family: var(--font-display);
  font-size: 21px;
  line-height: 1.24;
}

.page-about .about-col-card .card__body {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-mute);
}

.page-about .about-col-card .card__detail p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-weak);
  border-top: 1px dashed var(--ink-line);
  padding-top: 12px;
}

.page-about .about-more {
  margin-top: 24px;
}

/* ---------- 数据来源 ---------- */
.page-about .about-data-grid {
  display: grid;
  gap: 28px;
  margin-top: 22px;
}

.page-about .about-source-list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-source-list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 12px;
  font-size: 14px;
  color: var(--text-mute);
}

.page-about .about-source-list span {
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--cyan);
}

.page-about .about-net-wrap {
  border: 1px solid var(--ink-line);
  border-radius: var(--radius-lg);
  background: linear-gradient(150deg, var(--ink-navy), var(--ink-void));
  padding: 20px 18px 16px;
}

.page-about .about-net {
  display: block;
  width: 100%;
  height: auto;
  overflow: visible;
}

.page-about .about-net__line {
  fill: none;
  stroke: var(--ink-line);
  stroke-width: 1.4;
}

.page-about .about-net__line--main {
  stroke: var(--cyan);
  stroke-width: 2.4;
}

.page-about .about-net__node {
  fill: var(--ink-navy);
  stroke: var(--cyan);
  stroke-width: 1.6;
  transition: r 0.25s var(--ease), fill 0.25s var(--ease), stroke 0.25s var(--ease);
}

.page-about .about-net__node:hover {
  r: 9;
  fill: var(--cyan);
  stroke: var(--cyan);
}

.page-about .about-net__node--hub {
  fill: var(--orange);
  stroke: var(--orange-mist);
  transition: r 0.25s var(--ease), fill 0.25s var(--ease);
}

.page-about .about-net__node--hub:hover {
  r: 12;
  fill: var(--orange-mist);
}

.page-about .about-net__note {
  margin: 8px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--text-weak);
}

/* ---------- 团队 ---------- */
.page-about .about-roles {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-about .about-role {
  padding-top: 14px;
  border-top: 2px solid var(--ink-line);
  transition: border-color 0.25s var(--ease);
}

.page-about .about-role:hover {
  border-top-color: var(--cyan);
}

.page-about .about-role h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 19px;
}

.page-about .about-role p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--text-mute);
}

.page-about .about-note {
  margin-top: 26px;
  padding: 16px 18px;
  border-left: 3px solid var(--orange);
  background: rgba(255, 122, 26, 0.07);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.page-about .about-note p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--orange-mist);
}

.page-about .about-note a {
  color: var(--orange-mist);
  text-decoration: underline;
}

/* ---------- 主张段 ---------- */
.page-about .about-section--creed {
  border-top: 1px solid var(--ink-line);
}

.page-about .about-creed {
  max-width: 24ch;
  margin: 10px 0 34px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(27px, 6vw, 54px);
  line-height: 1.1;
  color: var(--text-weak);
}

.page-about .about-creed em {
  font-style: normal;
  color: var(--cyan);
}

.page-about .about-views {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 20px;
  max-width: 62ch;
}

.page-about .about-views li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
}

.page-about .about-views__mark {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan-deep);
  letter-spacing: 0.08em;
}

.page-about .about-views p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-mute);
}

.page-about .about-views strong {
  color: var(--text);
  font-weight: 600;
}

/* ---------- 结尾行动区 ---------- */
.page-about .about-cta {
  margin-top: 12px;
  padding: 26px 22px 28px;
  border: 1px solid var(--ink-line);
  border-radius: var(--radius-lg);
  background: linear-gradient(142deg, var(--ink-panel), var(--ink-navy));
  display: grid;
  gap: 20px;
}

.page-about .about-cta__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(22px, 4vw, 32px);
  line-height: 1.15;
}

.page-about .about-cta p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-mute);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.page-about .about-cta__actions .magnet {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  text-decoration: none;
}

/* ---------- 中屏 ---------- */
@media (min-width: 700px) {
  .page-about .about-belts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .about-roles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px 24px;
  }

  .page-about .about-roles .about-role:nth-child(even) {
    margin-top: 16px;
  }

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

  .page-about .about-cta {
    padding: 32px 30px;
  }
}

/* ---------- 宽屏：左侧框架目录 ---------- */
@media (min-width: 1000px) {
  .page-about .about-body {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
    padding-block: 52px 88px;
  }

  .page-about .about-index {
    position: sticky;
    top: 28px;
    border-top: 0;
    border-left: 1px solid var(--ink-line);
    padding: 0 0 0 20px;
  }

  .page-about .about-index__list {
    display: block;
  }

  .page-about .about-index__list li {
    position: relative;
    padding: 9px 0;
  }

  .page-about .about-index__list li::before {
    content: "";
    position: absolute;
    left: -24px;
    top: 16px;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--ink-line);
    transition: background 0.25s var(--ease), box-shadow 0.25s var(--ease);
  }

  .page-about .about-index__list li:hover::before {
    background: var(--cyan);
    box-shadow: 0 0 0 4px rgba(79, 240, 220, 0.14);
  }

  .page-about .about-index__link {
    font-size: 14px;
  }

  .page-about .about-figure--offset {
    width: 78%;
    margin-left: auto;
    margin-right: 0;
  }

  .page-about .about-figure--square {
    width: 62%;
  }

  .page-about .about-data-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: center;
    gap: 44px;
  }

  .page-about .about-net-wrap {
    padding: 26px 24px 20px;
  }

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

@media (min-width: 1240px) {
  .page-about .about-roles {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px 22px;
  }

  .page-about .about-roles .about-role:nth-child(even) {
    margin-top: 22px;
  }

  .page-about .about-roles .about-role:nth-child(3) {
    margin-top: 10px;
  }
}
<<<END>>>