.page-about {
  display: block;
}

/* ---------- 通用排版 ---------- */
.page-about .section {
  padding: clamp(44px, 7vw, 96px) 0;
}
.page-about .section + .section {
  border-top: 1px solid var(--line);
}
.page-about h2 {
  font-family: var(--font-head);
  font-size: clamp(25px, 4vw, 42px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  margin: 0 0 14px;
  color: var(--text);
}
.page-about h3 {
  font-family: var(--font-head);
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.35;
  margin: 0 0 8px;
  color: var(--text);
}
.page-about .section-num {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--orange);
  border: 2px solid var(--line-strong);
  padding: 3px 10px;
  margin-bottom: 16px;
}
.page-about .section-head {
  max-width: 62ch;
  margin-bottom: clamp(26px, 4vw, 46px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(22px, 4vw, 52px) 0 clamp(30px, 5vw, 60px);
}
.page-about .about-hero .breadcrumbs {
  margin-bottom: clamp(20px, 3vw, 36px);
}
.page-about .about-hero__title {
  font-family: var(--font-head);
  font-size: clamp(30px, 6.4vw, 66px);
  line-height: 1.05;
  letter-spacing: -0.012em;
  margin: 0 0 20px;
  max-width: 17em;
  color: var(--text);
}
.page-about .about-hero__lede {
  max-width: 60ch;
  font-size: clamp(16px, 1.6vw, 18.5px);
  color: var(--text-dim);
}

.page-about .about-hero__stats {
  list-style: none;
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  background: var(--line);
  border: 2px solid var(--line-strong);
}
.page-about .about-stat {
  background: var(--panel);
  padding: 18px 16px 20px;
  display: flex;
  flex-direction: column-reverse;
  gap: 6px;
  min-height: 96px;
}
.page-about .about-stat__num {
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  letter-spacing: -0.02em;
}
.page-about .about-stat__label {
  font-size: 13px;
  color: var(--text-dim);
  letter-spacing: 0.02em;
}

.page-about .about-hero__media {
  margin: clamp(28px, 4vw, 52px) 0 0;
  aspect-ratio: 2 / 1;
  border: 2px solid var(--line-strong);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
}
.page-about .media-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 时间轴 ---------- */
.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
}
.page-about .timeline__item {
  position: relative;
  padding: 26px 0 0;
  border-top: 2px solid var(--line-strong);
  transition: border-color var(--dur);
}
.page-about .timeline__item::before {
  content: "";
  position: absolute;
  top: -8px;
  left: 0;
  width: 12px;
  height: 12px;
  background: var(--ink);
  border: 2px solid var(--cyan);
  border-radius: 50%;
  transition: background var(--dur), border-color var(--dur);
}
.page-about .timeline__item:hover {
  border-top-color: var(--cyan);
}
.page-about .timeline__item:hover::before {
  background: var(--orange);
  border-color: var(--orange);
}
.page-about .timeline__year {
  display: block;
  font-size: clamp(28px, 3.6vw, 38px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  letter-spacing: -0.02em;
  margin-bottom: 14px;
}
.page-about .timeline__title {
  font-size: clamp(16px, 1.8vw, 19px);
  margin-bottom: 8px;
}
.page-about .timeline__text {
  font-size: 15px;
  line-height: 1.72;
  color: var(--text-dim);
  margin: 0;
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 4vw, 48px);
}
.page-about .about-team__note {
  margin: 18px 0 0;
  padding: 14px 16px;
  border-left: 3px solid var(--orange);
  background: var(--panel);
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--text-dim);
}

.page-about .about-team__chart {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  align-items: center;
}
.page-about .donut-wrap {
  margin: 0;
  display: flex;
  justify-content: center;
}
.page-about .donut {
  width: min(100%, 260px);
  height: auto;
  display: block;
}
.page-about .donut__seg {
  fill: none;
  stroke-width: 22;
  stroke-linecap: butt;
  transition: stroke-width var(--dur), opacity var(--dur);
}
.page-about .donut__seg--a { stroke: var(--cyan);    stroke-dasharray: 146.6 293.2; stroke-dashoffset: 0; }
.page-about .donut__seg--b { stroke: var(--magenta); stroke-dasharray: 97.7 342.1;  stroke-dashoffset: -146.6; }
.page-about .donut__seg--c { stroke: var(--amber);   stroke-dasharray: 76.8 363.0;  stroke-dashoffset: -244.3; }
.page-about .donut__seg--d { stroke: var(--green);   stroke-dasharray: 118.7 321.1; stroke-dashoffset: -321.1; }
.page-about .donut__num {
  font-family: var(--font-mono);
  font-size: 34px;
  font-weight: 700;
  fill: var(--text);
  text-anchor: middle;
}
.page-about .donut__unit {
  font-family: var(--font-body);
  font-size: 12px;
  letter-spacing: 0.12em;
  fill: var(--text-dim);
  text-anchor: middle;
}

.page-about .team-legend {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-about .team-legend__item {
  display: grid;
  grid-template-columns: 12px minmax(0, 1fr) auto;
  align-items: center;
  gap: 4px 12px;
  padding: 13px 15px;
  background: var(--panel);
  border: 2px solid var(--line);
  box-shadow: 4px 4px 0 0 rgba(33, 231, 208, 0.08);
  transition: border-color var(--dur), box-shadow var(--dur);
}
.page-about .team-legend__item:hover {
  border-color: var(--cyan);
  box-shadow: 8px 8px 0 0 rgba(33, 231, 208, 0.22);
}
.page-about .team-legend__dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  display: block;
}
.page-about .team-legend__dot--a { background: var(--cyan); }
.page-about .team-legend__dot--b { background: var(--magenta); }
.page-about .team-legend__dot--c { background: var(--amber); }
.page-about .team-legend__dot--d { background: var(--green); }
.page-about .team-legend__name {
  font-size: 15.5px;
  font-weight: 600;
  color: var(--text);
}
.page-about .team-legend__num {
  font-size: 20px;
  font-weight: 700;
  color: var(--cyan);
  line-height: 1;
}
.page-about .team-legend__desc {
  grid-column: 2 / -1;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--text-dim);
}

/* ---------- 发布流程 ---------- */
.page-about .about-flow__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 4vw, 52px);
  align-items: start;
}
.page-about .flow {
  list-style: none;
  margin: clamp(24px, 3vw, 36px) 0 0;
  padding: 0 0 0 14px;
}
.page-about .flow__step {
  position: relative;
  padding: 0 0 32px 34px;
  border-left: 2px solid var(--line-strong);
}
.page-about .flow__step:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}
.page-about .flow__step::before {
  content: "";
  position: absolute;
  left: -9px;
  top: 2px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--cyan);
}
.page-about .flow__step:last-child::before {
  border-color: var(--orange);
  background: var(--orange);
}
.page-about .flow__title {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 8px;
}
.page-about .flow__idx {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--magenta);
}
.page-about .flow__step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.74;
  color: var(--text-dim);
}

.page-about .about-flow__media {
  margin: 0;
  border: 2px solid var(--line-strong);
  box-shadow: var(--shadow-mag);
  aspect-ratio: 3 / 2;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.page-about .about-flow__media img {
  flex: 1 1 auto;
}
.page-about .about-flow__media figcaption {
  flex: 0 0 auto;
  padding: 12px 16px;
  background: var(--panel-2);
  border-top: 2px solid var(--line-strong);
  margin: 0;
}

/* ---------- 承诺纸面 ---------- */
.page-about .about-pledge {
  padding: clamp(44px, 7vw, 96px) 0;
}
.page-about .about-pledge__paper {
  padding: clamp(26px, 5vw, 58px);
  border: 2px solid var(--ink-deep);
  box-shadow: 12px 12px 0 0 rgba(255, 138, 43, 0.36);
}
.page-about .about-pledge__paper h2 {
  color: var(--ink-deep);
  max-width: 22em;
}
.page-about .about-pledge__eyebrow {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: #7A5A32;
}
.page-about .pledge-list {
  list-style: none;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
}
.page-about .pledge-list__item {
  border-top: 2px solid rgba(28, 22, 17, 0.22);
  padding-top: 16px;
}
.page-about .pledge-list__idx {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: #FFFFFF;
  background: var(--ink-deep);
  padding: 2px 9px;
  margin-bottom: 10px;
}
.page-about .pledge-list__item h3 {
  color: var(--ink-deep);
  font-size: clamp(16px, 1.9vw, 19px);
  margin-bottom: 8px;
}
.page-about .pledge-list__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.74;
  color: #3E3428;
}

/* ---------- 协作网络 ---------- */
.page-about .about-network__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 44px);
  align-items: start;
}
.page-about .about-network__media {
  margin: 0;
  aspect-ratio: 4 / 3;
  border: 2px solid var(--line-strong);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
}
.page-about .network-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}
.page-about .network-list__item {
  padding: 18px 20px;
  background: var(--panel);
  border: 2px solid var(--line);
  border-left: 4px solid var(--magenta);
  transition: border-color var(--dur), background var(--dur);
}
.page-about .network-list__item:hover {
  background: var(--panel-2);
  border-left-color: var(--orange);
}
.page-about .network-list__title {
  font-size: clamp(16px, 1.8vw, 18px);
  margin-bottom: 6px;
}
.page-about .network-list__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--text-dim);
}

/* ---------- 去路 ---------- */
.page-about .about-next__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}
.page-about .about-next__card {
  display: block;
  text-decoration: none;
  padding: clamp(22px, 3vw, 32px);
  background: linear-gradient(150deg, rgba(33, 231, 208, 0.14), rgba(255, 63, 164, 0.10) 70%, transparent);
  border: 2px solid var(--line-strong);
  box-shadow: 6px 6px 0 0 rgba(33, 231, 208, 0.16);
  transition: box-shadow var(--dur), border-color var(--dur), transform var(--dur);
}
.page-about .about-next__card--alt {
  background: linear-gradient(150deg, rgba(255, 138, 43, 0.16), rgba(255, 194, 75, 0.08) 70%, transparent);
  box-shadow: 6px 6px 0 0 rgba(255, 138, 43, 0.2);
}
.page-about .about-next__card:hover {
  border-color: var(--orange);
  box-shadow: 10px 10px 0 0 rgba(255, 138, 43, 0.34);
}
.page-about .about-next__tag {
  display: block;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--orange);
  margin-bottom: 14px;
}
.page-about .about-next__card h3 {
  font-size: clamp(19px, 2.4vw, 24px);
  margin-bottom: 10px;
}
.page-about .about-next__card p {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--text-dim);
}
.page-about .about-next__go {
  display: inline-block;
  font-size: 14px;
  font-weight: 700;
  color: var(--cyan);
  border-bottom: 2px solid var(--cyan);
  padding-bottom: 2px;
}
.page-about .about-next__note {
  margin: clamp(22px, 3vw, 32px) 0 0;
}
.page-about .about-next__note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(33, 231, 208, 0.5);
}
.page-about .about-next__note a:hover {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-team__chart {
    grid-template-columns: minmax(180px, 220px) minmax(0, 1fr);
  }
  .page-about .pledge-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px 30px;
  }
  .page-about .pledge-list__item:first-child {
    grid-column: 1 / -1;
  }
  .page-about .about-next__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 780px) {
  .page-about .timeline {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
  }
  .page-about .timeline__item {
    padding: 30px 24px 0 0;
  }
  .page-about .timeline__item + .timeline__item {
    padding-left: 24px;
    border-left: 1px solid var(--line);
  }
  .page-about .timeline__item + .timeline__item::before {
    left: 24px;
  }
  .page-about .pledge-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .pledge-list__item:first-child {
    grid-column: auto;
  }
}

@media (min-width: 900px) {
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    align-items: start;
  }
  .page-about .about-flow__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
  .page-about .about-network__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }
  .page-about .about-pledge__paper {
    margin-right: clamp(0px, 4vw, 60px);
  }
}

@media (min-width: 1100px) {
  .page-about .about-hero__title {
    max-width: 15em;
  }
  .page-about .about-team__chart {
    grid-template-columns: minmax(220px, 260px) minmax(0, 1fr);
    gap: 34px;
  }
}
<<<END>>>