.page-about {
  --about-line-soft: var(--line-soft);
  --about-gold-line: rgba(216, 169, 74, 0.18);
  --about-panel: rgba(255, 255, 255, 0.045);
  --about-text-soft: rgba(244, 238, 226, 0.74);
  --about-space: clamp(48px, 7.5vw, 104px);
  padding-bottom: clamp(48px, 8vw, 96px);
  overflow-x: clip;
}

/* 面包屑 */
.page-about .about-crumb {
  padding-top: clamp(18px, 2.6vw, 30px);
}

.page-about .about-crumb .crumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted-400);
}

.page-about .about-crumb .crumb-list li + li::before {
  content: "/";
  margin-right: 10px;
  color: rgba(216, 169, 74, 0.45);
}

.page-about .about-crumb a {
  color: var(--muted-400);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-crumb a:hover {
  color: var(--gold-300);
  border-bottom-color: var(--about-gold-line);
}

.page-about .about-crumb li[aria-current="page"] {
  color: var(--gold-500);
}

/* 通用排版 */
.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-display);
  color: var(--sand-100);
}

.page-about h1 {
  margin: 14px 0 0;
  font-weight: 900;
  font-size: clamp(32px, 6.4vw, 72px);
  line-height: 1.14;
  letter-spacing: 0.01em;
}

.page-about h2 {
  margin: 10px 0 0;
  font-weight: 700;
  font-size: clamp(23px, 3.6vw, 40px);
  line-height: 1.28;
}

.page-about h3 {
  margin: 0 0 10px;
  font-weight: 600;
  font-size: clamp(16px, 2vw, 20px);
  line-height: 1.45;
}

.page-about p {
  margin: 0 0 14px;
  line-height: 1.85;
  color: var(--about-text-soft);
}

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

.page-about .about-accent {
  color: var(--gold-300);
  text-shadow: 0 0 36px rgba(216, 169, 74, 0.35);
}

/* 首屏 */
.page-about .about-hero {
  display: grid;
  gap: clamp(28px, 5vw, 56px);
  align-items: start;
  padding-top: clamp(26px, 5vw, 56px);
}

.page-about .about-lede {
  margin-top: 22px;
  max-width: 44em;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.95;
  color: var(--about-text-soft);
}

.page-about .about-facts {
  display: grid;
  gap: 12px;
  margin: clamp(24px, 3vw, 34px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-facts li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--about-gold-line);
  font-size: 14px;
  line-height: 1.7;
  color: var(--about-text-soft);
}

.page-about .about-facts li:last-child {
  padding-bottom: 0;
  border-bottom: none;
}

.page-about .about-facts .num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--gold-500);
  border-bottom: 2px solid rgba(216, 169, 74, 0.55);
  padding-bottom: 2px;
  white-space: nowrap;
}

.page-about .about-actions {
  margin-top: clamp(24px, 3vw, 34px);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-hero-figure {
  position: relative;
  margin: 0;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--about-gold-line);
  background: var(--ink-800);
  box-shadow: 0 30px 70px -50px rgba(216, 169, 74, 0.55);
}

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

.page-about .about-hero-figure figcaption {
  padding: 12px 16px 14px;
  border-top: 1px solid var(--about-line-soft);
  background: rgba(7, 9, 12, 0.62);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted-400);
}

/* 为什么存在 */
.page-about .about-why {
  margin-top: var(--about-space);
}

.page-about .about-why-grid {
  display: grid;
  gap: clamp(22px, 4vw, 48px);
  padding-top: clamp(26px, 4vw, 44px);
  border-top: 1px solid var(--about-line-soft);
}

.page-about .about-why-body p {
  max-width: 40em;
}

.page-about .about-why-points {
  display: grid;
  gap: 14px;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-why-points li {
  position: relative;
  padding-left: 24px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--about-text-soft);
}

.page-about .about-why-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.85em;
  width: 12px;
  height: 1px;
  background: var(--gold-500);
}

/* 三条主线 */
.page-about .about-lines {
  margin-top: var(--about-space);
}

.page-about .about-sec-head {
  max-width: 52em;
}

.page-about .about-sec-lede {
  margin-top: 14px;
  max-width: 44em;
  font-size: 15px;
  color: var(--about-text-soft);
}

.page-about .about-lines-grid {
  display: grid;
  gap: var(--gap);
  margin-top: clamp(26px, 4vw, 44px);
}

.page-about .about-line-card {
  position: relative;
  padding: clamp(20px, 3vw, 30px);
  border-radius: 18px;
  border: 1px solid var(--about-line-soft);
  background: linear-gradient(155deg, var(--about-panel), rgba(255, 255, 255, 0.012));
  overflow: hidden;
}

.page-about .about-line-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 2px;
  background: linear-gradient(180deg, var(--gold-500), rgba(216, 169, 74, 0) 72%);
}

.page-about .about-line-num {
  display: block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 26px;
  line-height: 1;
  letter-spacing: 0.1em;
  color: rgba(216, 169, 74, 0.55);
}

.page-about .about-line-note {
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px dashed var(--about-gold-line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--gold-500);
}

/* 时间线 */
.page-about .about-history {
  margin-top: var(--about-space);
}

.page-about .about-timeline {
  position: relative;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, rgba(216, 169, 74, 0), var(--gold-500) 10%, rgba(216, 169, 74, 0.28) 70%, rgba(216, 169, 74, 0));
}

.page-about .about-timeline-item {
  position: relative;
  padding: 0 0 clamp(26px, 4vw, 40px) 34px;
}

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

.page-about .about-timeline-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  border: 1px solid var(--gold-500);
  background: var(--ink-900);
  box-shadow: 0 0 0 3px rgba(216, 169, 74, 0.12);
}

.page-about .about-year {
  display: inline-block;
  margin-bottom: 10px;
  padding-bottom: 3px;
  border-bottom: 2px solid var(--gold-500);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--gold-500);
}

.page-about .about-timeline-body p {
  max-width: 40em;
  font-size: 15px;
}

/* 团队 */
.page-about .about-team {
  margin-top: var(--about-space);
  display: grid;
  gap: clamp(24px, 4vw, 50px);
  align-items: start;
}

.page-about .about-team-media {
  margin: 0;
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid var(--about-line-soft);
  background: var(--ink-800);
}

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

.page-about .about-team-copy > p {
  max-width: 42em;
}

.page-about .about-roles {
  display: grid;
  gap: 14px;
  margin: clamp(20px, 3vw, 28px) 0 clamp(20px, 3vw, 28px);
  padding: 0;
  list-style: none;
}

.page-about .about-role {
  display: grid;
  gap: 6px;
  padding: 18px 20px;
  border-radius: 14px;
  border: 1px solid var(--about-line-soft);
  background: var(--about-panel);
}

.page-about .about-role-num {
  font-family: var(--font-mono);
  font-size: 20px;
  letter-spacing: 0.1em;
  color: var(--cyan-400);
}

.page-about .about-role strong {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  color: var(--sand-100);
}

.page-about .about-role span:last-child {
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--muted-400);
}

.page-about .about-team-foot {
  padding-top: 16px;
  border-top: 1px solid var(--about-gold-line);
  font-size: 14px;
  color: var(--about-text-soft);
}

/* 会员 */
.page-about .about-members {
  margin-top: var(--about-space);
}

.page-about .about-members-grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  margin-top: clamp(26px, 4vw, 44px);
  align-items: start;
}

.page-about .about-rings {
  margin: 0;
  padding: 18px 16px 12px;
  border-radius: 18px;
  border: 1px solid var(--about-gold-line);
  background: radial-gradient(circle at 50% 100%, rgba(216, 169, 74, 0.12), rgba(7, 9, 12, 0) 70%);
}

.page-about .about-rings svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-rings figcaption {
  margin-top: 8px;
  text-align: center;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted-400);
}

.page-about .about-member-cards {
  display: grid;
  gap: 14px;
}

.page-about .about-member-card {
  padding: 20px 22px;
  border-radius: 16px;
  border: 1px solid var(--about-line-soft);
  border-left: 2px solid rgba(216, 169, 74, 0.6);
  background: linear-gradient(120deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.012));
}

.page-about .about-member-tier {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--gold-300);
}

.page-about .about-member-card p:last-child {
  font-size: 14px;
  line-height: 1.8;
  color: var(--about-text-soft);
}

/* 合作生态 */
.page-about .about-eco {
  margin-top: var(--about-space);
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  align-items: start;
}

.page-about .about-eco-lede {
  margin-top: 14px;
  max-width: 36em;
  font-size: 15px;
}

.page-about .about-eco-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.page-about .about-eco-jump a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--about-gold-line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gold-300);
  text-decoration: none;
  transition: background 0.22s var(--ease), border-color 0.22s var(--ease), color 0.22s var(--ease);
}

.page-about .about-eco-jump a:hover {
  background: rgba(216, 169, 74, 0.14);
  border-color: rgba(216, 169, 74, 0.5);
  color: var(--sand-100);
}

.page-about .about-eco-figure {
  margin: clamp(24px, 3vw, 34px) 0 0;
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid var(--about-line-soft);
  background: var(--ink-800);
}

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

.page-about .about-eco-figure figcaption {
  padding: 12px 16px 14px;
  border-top: 1px solid var(--about-line-soft);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted-400);
}

.page-about .about-eco-groups {
  position: relative;
  display: grid;
  gap: 14px;
  padding-left: 22px;
}

.page-about .about-eco-groups::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, rgba(216, 169, 74, 0), var(--gold-500) 14%, rgba(216, 169, 74, 0.25) 82%, rgba(216, 169, 74, 0));
}

.page-about .about-eco-group {
  position: relative;
  padding: 20px 22px;
  border-radius: 16px;
  border: 1px solid var(--about-line-soft);
  background: var(--about-panel);
}

.page-about .about-eco-group::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 26px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--gold-500);
  box-shadow: 0 0 12px rgba(216, 169, 74, 0.7);
}

.page-about .about-eco-count {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 28px;
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--gold-300);
}

.page-about .about-eco-count span {
  margin-left: 4px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--muted-400);
}

.page-about .about-eco-group h3 {
  margin-bottom: 8px;
  font-size: 17px;
}

.page-about .about-eco-group p:last-child {
  font-size: 14px;
  line-height: 1.8;
  color: var(--about-text-soft);
}

/* 服务承诺 */
.page-about .about-promise {
  margin-top: var(--about-space);
}

.page-about .about-promise-card {
  position: relative;
  padding: clamp(24px, 4vw, 46px);
  border-radius: 22px;
  border: 1px solid rgba(216, 169, 74, 0.28);
  background:
    radial-gradient(circle at 88% 0%, rgba(216, 169, 74, 0.16), rgba(7, 9, 12, 0) 58%),
    linear-gradient(160deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.012));
  overflow: hidden;
}

.page-about .about-promise-card > p {
  max-width: 44em;
}

.page-about .about-promise-list {
  display: grid;
  gap: 14px;
  margin: clamp(22px, 3vw, 30px) 0;
  padding: 0;
  list-style: none;
}

.page-about .about-promise-list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  align-items: baseline;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--about-gold-line);
  font-size: 14px;
  line-height: 1.7;
  color: var(--about-text-soft);
}

.page-about .about-promise-list li:last-child {
  padding-bottom: 0;
  border-bottom: none;
}

.page-about .about-promise-num {
  font-family: var(--font-mono);
  font-size: 22px;
  letter-spacing: 0.06em;
  color: var(--gold-300);
  white-space: nowrap;
}

.page-about .about-promise-num small {
  margin-left: 3px;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted-400);
}

.page-about .about-promise-contact {
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 2;
  letter-spacing: 0.04em;
  color: var(--sand-100);
  word-break: break-word;
}

.page-about .about-promise-tip {
  margin-top: 8px;
  font-size: 13px;
  color: var(--muted-400);
}

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

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

  .page-about .about-member-card:first-child {
    grid-column: 1 / -1;
  }

  .page-about .about-promise-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .about-promise-list li {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
    border-bottom: none;
    border-left: 2px solid rgba(216, 169, 74, 0.45);
    padding: 0 0 0 14px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: clamp(36px, 5vw, 72px);
  }

  .page-about .about-hero-figure {
    transform: translateY(clamp(8px, 2vw, 28px));
  }

  .page-about .about-why-grid {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    gap: clamp(30px, 5vw, 64px);
  }

  .page-about .about-lines-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .about-line-card:nth-child(2) {
    margin-top: clamp(14px, 2.6vw, 34px);
  }

  .page-about .about-line-card:nth-child(3) {
    margin-top: clamp(28px, 5.2vw, 68px);
  }

  .page-about .about-timeline-item {
    display: grid;
    grid-template-columns: 116px minmax(0, 1fr);
    gap: clamp(20px, 3vw, 40px);
    padding-left: 40px;
  }

  .page-about .about-year {
    justify-self: start;
    margin-bottom: 0;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    gap: clamp(32px, 4.6vw, 64px);
  }

  .page-about .about team-media {
    position: sticky;
    top: calc(var(--head-h) + 24px);
  }

  .page-about .about-members-grid {
    grid-template-columns: minmax(0, 0.78fr) minmax(0, 1.22fr);
    gap: clamp(30px, 4vw, 56px);
  }

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

  .page-about .about-member-card:first-child {
    grid-column: auto;
  }

  .page-about .about-eco {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: clamp(32px, 4.5vw, 64px);
  }

  .page-about .about-eco-figure {
    max-width: 420px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-hero {
    gap: 80px;
  }

  .page-about .about-line-card {
    padding: 32px 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-hero-figure {
    transform: none;
  }

  .page-about .about-eco-jump a,
  .page-about .about-crumb a {
    transition: none;
  }
}
<<<END>>>