.page-about {
  --about-rule: rgba(34, 211, 255, 0.22);
  --about-rule-soft: rgba(143, 166, 196, 0.2);
  --about-block-gap: clamp(44px, 6.5vw, 92px);
  display: block;
}

.page-about .about-wrap {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumbs-wrap {
  padding-top: clamp(16px, 3vw, 28px);
}
.page-about .crumbs-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  letter-spacing: 0.02em;
}
.page-about .crumbs-list a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}
.page-about .crumbs-list a:hover,
.page-about .crumbs-list a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}
.page-about .crumbs-list a[aria-current="page"] {
  color: var(--text);
}
.page-about .crumb-sep {
  color: var(--muted);
  opacity: 0.7;
}

/* ---------- 首屏刊头 ---------- */
.page-about .about-hero {
  padding-block: clamp(26px, 4vw, 44px) clamp(38px, 5.5vw, 72px);
}
.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
  align-items: start;
}
.page-about .about-kicker {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}
.page-about .about-title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(42px, 8.6vw, 104px);
  line-height: 0.94;
  letter-spacing: -0.015em;
  color: var(--text);
  text-wrap: balance;
}
.page-about .about-title em {
  font-style: normal;
  color: var(--cyan);
  text-shadow: 0 0 28px rgba(34, 211, 255, 0.45);
}
.page-about .about-lede {
  margin: 20px 0 0;
  max-width: 46ch;
  font-size: clamp(16px, 1.9vw, 18px);
  line-height: 1.82;
  color: var(--text);
}
.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero-visual {
  position: relative;
  margin: 0;
}
.page-about .about-shot {
  display: block;
  border: 1px solid var(--about-rule);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
  background: var(--ink-700);
}
.page-about .about-shot img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}
.page-about .about-hero-slip {
  margin-top: 14px;
  display: block;
}
.page-about .about-slip-index {
  display: block;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  opacity: 0.7;
  margin-bottom: 6px;
}
.page-about .about-hero-slip p {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
}

/* ---------- 数据条 ---------- */
.page-about .about-ledger-section {
  padding-bottom: clamp(8px, 2vw, 16px);
}
.page-about .about-ledger {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--about-rule-soft);
  border: 1px solid var(--about-rule-soft);
}
.page-about .about-ledger-cell {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: clamp(16px, 2.4vw, 24px);
  background: var(--ink-700);
}
.page-about .about-ledger-num {
  font-size: clamp(26px, 4vw, 38px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  letter-spacing: -0.02em;
}
.page-about .about-ledger-label {
  font-size: 13px;
  line-height: 1.55;
  color: var(--muted);
}

/* ---------- 通用区块 ---------- */
.page-about .about-section {
  padding-block: var(--about-block-gap);
}
.page-about .about-section h2 {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 4.2vw, 42px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--text);
}
.page-about .about-note {
  margin: 16px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 48ch;
}
.page-about .eyebrow {
  margin: 0;
  color: var(--violet-soft);
}

/* ---------- 时间线 ---------- */
.page-about .about-tl-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 56px);
}
.page-about .tl-list {
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .tl-node {
  position: relative;
  padding-left: 22px;
  padding-bottom: clamp(18px, 2.6vw, 28px);
  border-left: 1px solid var(--about-rule-soft);
}
.page-about .tl-node::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 8px;
  width: 9px;
  height: 9px;
  background: var(--cyan);
  transform: rotate(45deg);
  box-shadow: 0 0 12px rgba(34, 211, 255, 0.8);
}
.page-about .tl-item summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding: 2px 0 6px;
  cursor: pointer;
  list-style: none;
}
.page-about .tl-item summary::-webkit-details-marker {
  display: none;
}
.page-about .tl-item summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
}
.page-about .tl-year {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--orange);
}
.page-about .tl-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 2.6vw, 26px);
  line-height: 1.2;
  color: var(--text);
}
.page-about .tl-mark {
  position: relative;
  width: 14px;
  height: 14px;
  margin-left: auto;
  flex: 0 0 auto;
  align-self: center;
  transition: transform 0.2s ease;
}
.page-about .tl-mark::before,
.page-about .tl-mark::after {
  content: "";
  position: absolute;
  background: var(--cyan);
}
.page-about .tl-mark::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 1px;
}
.page-about .tl-mark::after {
  left: 6px;
  top: 0;
  width: 1px;
  height: 14px;
}
.page-about .tl-item[open] .tl-mark {
  transform: rotate(45deg);
}
.page-about .tl-item[open] .tl-title {
  color: var(--cyan);
}
.page-about .tl-body {
  padding: 4px 0 6px;
  border-top: 1px dashed var(--about-rule-soft);
  margin-top: 4px;
}
.page-about .tl-body p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 52ch;
}

/* ---------- 扫描线图片带 ---------- */
.page-about .about-strip {
  margin: clamp(30px, 4vw, 52px) 0 0;
}
.page-about .about-strip-frame {
  display: block;
  border: 1px solid var(--about-rule);
  overflow: hidden;
  background: var(--ink-700);
  box-shadow: var(--shadow-hard);
}
.page-about .about-strip-frame img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}
.page-about .media-frame-cap {
  display: block;
  margin-top: 12px;
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--muted);
  border-left: 2px solid var(--violet);
  padding-left: 10px;
}

/* ---------- 运营标准 ---------- */
.page-about .about-standard-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.5vw, 44px);
}
.page-about .std-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}
.page-about .std-card {
  padding: clamp(18px, 2.6vw, 26px);
  display: block;
}
.page-about .std-num {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--orange);
}
.page-about .std-card h3 {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: 0;
  color: var(--ink-900);
}
.page-about .std-card p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: #3c3226;
}
.page-about .std-cadence {
  margin: 4px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}
.page-about .std-cadence li {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--about-rule-soft);
}

/* ---------- 团队 ---------- */
.page-about .about-team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.5vw, 48px);
}
.page-about .team-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: clamp(18px, 2.6vw, 26px);
}
.page-about .team-row-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}
.page-about .team-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  color: var(--text);
}
.page-about .team-count {
  font-size: 13px;
  color: var(--cyan);
  letter-spacing: 0.06em;
}
.page-about .team-track {
  display: block;
  height: 6px;
  margin-top: 10px;
  background: rgba(143, 166, 196, 0.16);
  overflow: hidden;
}
.page-about .team-fill {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--violet));
  box-shadow: 0 0 14px rgba(34, 211, 255, 0.5);
}
.page-about .team-fill--a {
  width: 33.3%;
}
.page-about .team-fill--b {
  width: 27.8%;
}
.page-about .team-fill--c {
  width: 38.9%;
}
.page-about .team-desc {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 服务网络 ---------- */
.page-about .about-network-body {
  margin-top: clamp(24px, 3.5vw, 40px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.5vw, 44px);
}
.page-about .about-network-visual {
  margin: 0;
}
.page-about .partner-grid {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}
.page-about .partner {
  padding: 16px 18px;
  border: 1px solid var(--about-rule-soft);
  background: var(--ink-700);
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.page-about .partner:hover,
.page-about .partner:focus-within {
  border-color: var(--about-rule);
  transform: translateY(-2px);
}
.page-about .partner p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 成绩单 ---------- */
.page-about .trust-grid {
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}
.page-about .trust-card {
  padding: clamp(18px, 2.4vw, 24px);
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.page-about .trust-num {
  font-size: clamp(30px, 4.4vw, 42px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--text);
}
.page-about .trust-num small {
  font-size: 0.42em;
  letter-spacing: 0.04em;
  color: var(--cyan);
  margin-left: 4px;
}
.page-about .trust-label {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--violet-soft);
}
.page-about .trust-card p {
  margin: 4px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 收尾 ---------- */
.page-about .about-close {
  padding-bottom: clamp(48px, 7vw, 96px);
}
.page-about .about-close-panel {
  padding: clamp(24px, 4vw, 44px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
}
.page-about .about-close-copy h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.6vw, 36px);
  line-height: 1.15;
  color: var(--text);
}
.page-about .about-close-copy p {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 60ch;
}
.page-about .about-close .about-actions {
  margin-top: 22px;
}

/* ---------- 平板 ---------- */
@media (min-width: 640px) {
  .page-about .about-ledger {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .std-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .trust-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .partner-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.32fr) minmax(0, 0.92fr);
    align-items: start;
  }
  .page-about .about-hero-slip {
    position: absolute;
    left: 16px;
    bottom: 16px;
    right: 16px;
    margin-top: 0;
    max-width: 260px;
  }
  .page-about .about-tl-grid {
    grid-template-columns: minmax(0, 0.62fr) minmax(0, 1.15fr);
    align-items: start;
    gap: clamp(32px, 5vw, 72px);
  }
  .page-about .about-tl-rail {
    position: sticky;
    top: 32px;
  }
  .page-about .tl-node:nth-child(2) {
    margin-left: 24px;
  }
  .page-about .tl-node:nth-child(3) {
    margin-left: 48px;
  }
  .page-about .tl-node:nth-child(4) {
    margin-left: 72px;
  }
  .page-about .tl-node:nth-child(5) {
    margin-left: 96px;
  }
  .page-about .tl-node:nth-child(6) {
    margin-left: 120px;
  }
  .page-about .about-standard-grid {
    grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.3fr);
    align-items: start;
    gap: clamp(32px, 4.5vw, 64px);
  }
  .page-about .std-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }
  .page-about .std-cadence {
    grid-column: 2;
    margin-top: clamp(22px, 3vw, 32px);
  }
  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.3fr);
    align-items: start;
    gap: clamp(32px, 4.5vw, 64px);
  }
  .page-about .about-network-body {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.95fr);
    align-items: start;
    gap: clamp(28px, 4vw, 52px);
  }
  .page-about .partner-grid {
    grid-template-columns: minmax(0, 1fr);
  }
  .page-about .trust-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }
  .page-about .about-close-panel {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.9fr);
    align-items: center;
    gap: clamp(24px, 3.5vw, 44px);
  }
  .page-about .about-close .about-actions {
    margin-top: 0;
    justify-content: flex-end;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .partner,
  .page-about .tl-mark,
  .page-about .crumbs-list a {
    transition: none;
  }
  .page-about .partner:hover,
  .page-about .partner:focus-within {
    transform: none;
  }
}