.page-about {
  --about-radius: 3px;
  --about-line: 1px solid var(--c-line);
  padding-bottom: 0;
  color: var(--c-text);
}

.page-about .wrap {
  padding-bottom: 0;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  padding: 20px 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-muted);
}
.page-about .breadcrumb a {
  color: var(--c-muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--c-cyan);
  border-bottom-color: var(--c-cyan);
}
.page-about .breadcrumb span[aria-hidden] {
  margin: 0 8px;
  color: var(--c-line);
}

/* ---------- 通用区块 ---------- */
.page-about .about-section {
  margin-top: 72px;
  padding-top: 40px;
  border-top: var(--about-line);
}

.page-about h1 {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(30px, 7vw, 54px);
  line-height: 1.22;
  letter-spacing: -0.01em;
  margin: 12px 0 0;
  color: var(--c-text);
}

.page-about h2 {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(23px, 4vw, 36px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  margin: 10px 0 16px;
  color: var(--c-text);
}

.page-about h3 {
  font-family: var(--font-cond);
  font-weight: 600;
  font-size: 18px;
  line-height: 1.4;
  margin: 6px 0 8px;
  color: var(--c-text);
}

.page-about p {
  font-size: 16px;
  line-height: 1.78;
  color: var(--c-muted);
  margin: 0 0 16px;
}

.page-about .section-lede {
  max-width: 60ch;
  font-size: 16.5px;
}

.page-about .text-link {
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(63, 224, 201, 0.35);
  padding-bottom: 2px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-about .text-link:hover,
.page-about .text-link:focus-visible {
  color: var(--c-cyan-soft);
  border-bottom-color: var(--c-cyan-soft);
}
.page-about a:focus-visible,
.page-about summary:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 3px;
}

.page-about .label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--c-orange);
  margin: 0 0 10px;
}

.page-about .mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
  color: var(--c-orange);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: 28px 0 8px;
  position: relative;
}
.page-about .about-hero::after {
  content: "";
  display: block;
  height: 3px;
  width: 96px;
  margin-top: 40px;
  background: linear-gradient(90deg, var(--c-cyan), var(--c-orange));
}

.page-about .about-hero-grid {
  display: grid;
  gap: 28px;
  margin-top: 28px;
}

.page-about .hero-lead p:first-child {
  font-size: 17px;
  color: var(--c-text);
}

.page-about .hero-panel {
  border: var(--about-line);
  border-left: 3px solid var(--c-cyan);
  border-radius: var(--about-radius);
  background: linear-gradient(150deg, rgba(11, 38, 53, 0.9), rgba(5, 19, 31, 0.9));
  padding: 22px 22px 14px;
}

.page-about .hero-panel .stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 14px 0;
  border-bottom: var(--about-line);
}
.page-about .hero-panel .stat:last-child {
  border-bottom: 0;
}
.page-about .hero-panel .stat-value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: 26px;
  line-height: 1.1;
  color: var(--c-text);
}
.page-about .hero-panel .stat-label {
  font-family: var(--font-cond);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--c-muted);
}

/* ---------- 左右对读 ---------- */
.page-about .split {
  display: grid;
  gap: 36px;
}

.page-about .split-aside h2 {
  margin-top: 10px;
}

.page-about .aside-link {
  margin-top: 22px;
}

/* ---------- 时间线 ---------- */
.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
  border-left: 1px solid var(--c-line);
}

.page-about .tl-node {
  position: relative;
  padding-bottom: 22px;
}
.page-about .tl-node:last-child {
  padding-bottom: 0;
}
.page-about .tl-node::before {
  content: "";
  position: absolute;
  left: -31.5px;
  top: 22px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--c-abyss);
  border: 1.5px solid var(--c-cyan);
  box-sizing: border-box;
  transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .tl-card {
  position: relative;
  border: var(--about-line);
  border-radius: var(--about-radius);
  background: var(--c-archive);
  padding: 18px 20px 16px;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.page-about .tl-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  bottom: 14px;
  width: 3px;
  background: transparent;
  transition: background var(--dur) var(--ease);
}
.page-about .tl-card:hover,
.page-about .tl-card:focus-within {
  border-color: var(--c-cyan);
}
.page-about .tl-card:hover::before,
.page-about .tl-card:focus-within::before {
  background: var(--c-orange);
}
.page-about .tl-node:hover::before {
  background: var(--c-cyan);
  box-shadow: 0 0 0 4px rgba(63, 224, 201, 0.16);
}

.page-about .tl-year {
  display: inline-block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: 20px;
  letter-spacing: 0.06em;
  color: var(--c-cyan);
  margin-bottom: 2px;
}

.page-about .tl-card p {
  margin-bottom: 12px;
  font-size: 15px;
}

.page-about .tl-tag {
  display: inline-block;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--c-orange);
  background: rgba(255, 154, 60, 0.09);
  border: 1px solid rgba(255, 154, 60, 0.3);
  border-radius: var(--about-radius);
}

/* ---------- 图片容器 ---------- */
.page-about .about-figure {
  position: relative;
  overflow: hidden;
  border-radius: var(--about-radius);
  background: linear-gradient(140deg, var(--c-archive), var(--c-abyss));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}
.page-about .about-figure img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}
.page-about .about-figure--32 {
  aspect-ratio: 3 / 2;
}
.page-about .about-figure--11 {
  aspect-ratio: 1 / 1;
}
.page-about .about-figure--107 {
  aspect-ratio: 10 / 7;
}

/* ---------- 团队 ---------- */
.page-about .about-team .about-figure {
  margin: 26px 0 28px;
}

.page-about .role-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: flex-start;
}

.page-about .role {
  flex: 0 1 auto;
  max-width: 100%;
  border: var(--about-line);
  border-left: 3px solid var(--c-line);
  border-radius: var(--about-radius);
  background: var(--c-glass);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.page-about .role:hover,
.page-about .role:focus-within {
  border-color: var(--c-cyan);
  border-left-color: var(--c-orange);
}
.page-about .role[open] {
  flex: 1 1 100%;
  background: var(--c-archive);
}

.page-about .role summary {
  cursor: pointer;
  list-style: none;
  padding: 12px 18px;
  font-family: var(--font-cond);
  font-weight: 600;
  font-size: 16.5px;
  letter-spacing: 0.03em;
  color: var(--c-text);
  white-space: nowrap;
  transition: color var(--dur) var(--ease);
}
.page-about .role summary::-webkit-details-marker {
  display: none;
}
.page-about .role summary::after {
  content: " +";
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-cyan);
}
.page-about .role[open] summary::after {
  content: " −";
  color: var(--c-orange);
}

.page-about .role-note {
  padding: 0 18px 16px;
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--c-muted);
  max-width: 68ch;
}

/* ---------- 采集协作 ---------- */
.page-about .eco-grid {
  display: grid;
  gap: 26px;
}

.page-about .eco-facts {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.page-about .eco-facts li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 11px 14px;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--c-text);
  background: var(--c-glass);
  border-left: 3px solid var(--c-cyan);
  border-radius: var(--about-radius);
}
.page-about .eco-facts .mono {
  flex: 0 0 auto;
  font-weight: 700;
  font-size: 15px;
}

/* ---------- 培训 ---------- */
.page-about .about-training {
  border-top: 0;
  margin-top: 84px;
  padding: 42px 24px 36px;
  background: linear-gradient(155deg, rgba(11, 38, 53, 0.95), rgba(5, 19, 31, 0.75));
  border-left: 3px solid var(--c-cyan);
  border-radius: var(--about-radius);
}

.page-about .train-grid {
  display: grid;
  gap: 28px;
}

.page-about .train-list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-about .train-list li {
  display: grid;
  gap: 2px;
  padding-left: 16px;
  border-left: 2px solid var(--c-orange);
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--c-muted);
}
.page-about .train-list .mono {
  font-weight: 700;
  font-size: 16px;
  color: var(--c-orange);
}

.page-about .train-figure {
  align-self: start;
}

/* ---------- 服务节奏 ---------- */
.page-about .promise-grid {
  display: grid;
  gap: 14px;
  margin-top: 30px;
}

.page-about .promise-card {
  border: var(--about-line);
  border-top: 3px solid var(--c-cyan);
  border-radius: var(--about-radius);
  background: rgba(5, 19, 31, 0.6);
  padding: 20px 20px 18px;
  transition: border-top-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.page-about .promise-card:hover,
.page-about .promise-card:focus-within {
  border-top-color: var(--c-orange);
  background: var(--c-archive);
}
.page-about .promise-num {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: clamp(34px, 8vw, 48px);
  line-height: 1;
  color: var(--c-cyan);
  margin-bottom: 6px;
}
.page-about .promise-card h3 {
  font-size: 16px;
  color: var(--c-text);
  margin-bottom: 6px;
}
.page-about .promise-card p {
  font-size: 14.5px;
  line-height: 1.7;
  margin: 0;
}

/* ---------- 珠宝色分区 ---------- */
.page-about .jewel-row {
  display: grid;
  gap: 16px;
}

.page-about .jewel {
  padding: 28px 24px 24px;
  border-radius: var(--about-radius);
  position: relative;
  overflow: hidden;
}
.page-about .jewel::after {
  content: "";
  position: absolute;
  right: -40px;
  bottom: -40px;
  width: 140px;
  height: 140px;
  border: 1px solid rgba(233, 246, 248, 0.14);
  transform: rotate(45deg);
  pointer-events: none;
}
.page-about .jewel h2 {
  font-size: clamp(21px, 3.6vw, 30px);
  margin-bottom: 12px;
}
.page-about .jewel p {
  color: rgba(234, 244, 246, 0.82);
}
.page-about .jewel .eyebrow {
  color: rgba(234, 244, 246, 0.72);
}

.page-about .jewel--wine {
  background: linear-gradient(160deg, var(--c-wine), #3d0f1a);
  border-left: 3px solid var(--c-red);
}
.page-about .jewel--indigo {
  background: linear-gradient(160deg, var(--c-indigo), #150f38);
  border-left: 3px solid var(--c-cyan);
}
.page-about .jewel .text-link {
  color: var(--c-cyan-soft);
  border-bottom-color: rgba(143, 242, 228, 0.45);
}
.page-about .jewel .text-link:hover,
.page-about .jewel .text-link:focus-visible {
  color: var(--c-text);
  border-bottom-color: var(--c-text);
}
.page-about .jewel-link {
  margin: 18px 0 0;
}

/* ---------- 收尾 ---------- */
.page-about .about-close {
  margin-top: 72px;
  padding: 40px 0 96px;
  border-top: var(--about-line);
}
.page-about .close-inner {
  border: var(--about-line);
  border-radius: var(--about-radius);
  background: linear-gradient(150deg, rgba(11, 38, 53, 0.85), rgba(5, 19, 31, 0.85));
  padding: 30px 24px 28px;
}
.page-about .close-inner h2 {
  margin-top: 0;
}
.page-about .close-inner p {
  max-width: 58ch;
}
.page-about .close-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 20px;
  margin-top: 22px;
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-about .promise-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }
  .page-about .jewel-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }
  .page-about .about-training {
    padding: 46px 40px 40px;
  }
  .page-about .close-inner {
    padding: 40px 40px 36px;
  }
  .page-about .about-section {
    margin-top: 88px;
  }
}

@media (min-width: 1000px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 48px;
    align-items: start;
  }
  .page-about .split {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 56px;
    align-items: start;
  }
  .page-about .split-aside {
    position: sticky;
    top: 32px;
  }
  .page-about .eco-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 48px;
    align-items: center;
  }
  .page-about .train-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: 44px;
    align-items: center;
  }
  .page-about .promise-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-team .about-figure {
    margin: 32px 0 34px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 0ms !important;
  }
}
</main>