.page-about {
  --about-rail: 236px;
  --about-gap: clamp(26px, 3.4vw, 56px);
  display: block;
  background: var(--ink);
  color: var(--text);
  overflow-x: clip;
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding: clamp(36px, 6vw, 84px) 0 clamp(30px, 4.6vw, 58px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -12% -6% 0 -6%;
  z-index: -2;
  background:
    radial-gradient(58% 54% at 88% 6%, rgba(122, 59, 255, 0.32), transparent 68%),
    radial-gradient(52% 62% at 0% 100%, rgba(35, 240, 230, 0.16), transparent 66%),
    linear-gradient(180deg, rgba(11, 18, 32, 0.92), transparent 80%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(138, 151, 173, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(138, 151, 173, 0.07) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 78%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 78%);
  pointer-events: none;
}

.page-about .about-hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
}

.page-about .about-title {
  margin: 14px 0 0;
  font-size: clamp(34px, 6.8vw, 76px);
  line-height: 1.02;
  font-weight: 900;
  letter-spacing: -0.02em;
  transform: skewX(-2deg);
}

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

.page-about .about-lede {
  margin: 18px 0 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.5vw, 17.5px);
  line-height: 1.82;
}

.page-about .about-lede--sub {
  margin-top: 12px;
  font-size: 15px;
  color: var(--muted);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  align-self: end;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--line);
  overflow: hidden;
}

.page-about .stat-cell {
  display: grid;
  gap: 6px;
  padding: 16px 14px 14px;
  background: linear-gradient(180deg, rgba(20, 29, 48, 0.94), rgba(11, 18, 32, 0.94));
}

.page-about .stat-num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 4.4vw, 32px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--yellow);
}

.page-about .stat-label {
  font-size: 12.5px;
  line-height: 1.4;
  color: var(--muted);
}

/* ---------- 双栏布局 ---------- */

.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
  padding-top: clamp(24px, 3.6vw, 48px);
}

.page-about .about-rail-title {
  margin: 0 0 10px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .about-rail-title--gap {
  margin-top: 18px;
}

.page-about .axis-nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 8px;
  scrollbar-width: thin;
}

.page-about .axis-nav::-webkit-scrollbar {
  height: 4px;
}

.page-about .axis-nav::-webkit-scrollbar-thumb {
  background: var(--line-strong);
  border-radius: var(--r-pill);
}

.page-about .axis-link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: var(--navy);
  color: var(--text);
  font-size: 13px;
  white-space: nowrap;
  text-decoration: none;
  transition: border-color 0.18s ease, color 0.18s ease, background 0.18s ease;
}

.page-about .axis-link:hover,
.page-about .axis-link:focus-visible {
  border-color: var(--line-cyan);
  color: var(--cyan);
  outline: none;
}

.page-about .axis-year {
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 700;
  color: var(--yellow);
}

/* ---------- 章节 ---------- */

.page-about .about-section {
  padding: clamp(30px, 4.4vw, 54px) 0;
  border-top: 1px solid var(--line);
}

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

.page-about .section-title {
  margin: 10px 0 0;
  font-size: clamp(24px, 3.2vw, 38px);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.01em;
}

.page-about .about-para {
  margin: 22px 0 0;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

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

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

.page-about .media-caption {
  margin: 10px 0 0;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 日常条目 ---------- */

.page-about .daily-list {
  display: grid;
  gap: 10px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .daily-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: linear-gradient(120deg, rgba(20, 29, 48, 0.78), rgba(11, 18, 32, 0.5));
  transition: border-color 0.2s ease;
}

.page-about .daily-item:hover {
  border-color: var(--line-cyan);
}

.page-about .daily-num {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-about .daily-name {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
}

.page-about .daily-text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 数字条 ---------- */

.page-about .stat-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 24px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--line);
  overflow: hidden;
}

/* ---------- 档案筛选与卡片墙 ---------- */

.page-about .filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 24px;
}

.page-about .filter-status {
  margin: 0 0 0 auto;
  font-size: 12.5px;
  color: var(--muted);
}

.page-about .archive-wall {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: 18px;
}

.page-about .archive-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 168px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(160deg, rgba(20, 29, 48, 0.92), rgba(11, 18, 32, 0.72));
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.page-about .archive-card:hover {
  border-color: var(--line-cyan);
  box-shadow: var(--glow-violet);
}

.page-about .archive-card .tag {
  align-self: flex-start;
}

.page-about .archive-card .card-title {
  margin: 0;
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.35;
}

.page-about .archive-card .card-body {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 团队 ---------- */

.page-about .crew-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: 22px;
}

.page-about .crew-card {
  padding: 20px 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: rgba(11, 18, 32, 0.72);
}

.page-about .crew-count {
  font-family: var(--font-mono);
  font-size: 34px;
  font-weight: 700;
  line-height: 1;
  color: var(--yellow);
}

.page-about .crew-role {
  margin: 10px 0 8px;
  font-size: 16px;
  font-weight: 700;
}

.page-about .crew-desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--muted);
}

.page-about .quote-note {
  margin: 24px 0 0;
  padding: 18px 20px 18px 22px;
  border-left: 2px solid var(--cyan);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  background: linear-gradient(90deg, rgba(35, 240, 230, 0.1), transparent 72%);
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--text);
}

/* ---------- 时间轴 ---------- */

.page-about .about-axis {
  position: relative;
  margin: 26px 0 0;
  padding: 0 0 0 26px;
  list-style: none;
}

.page-about .about-axis::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 6px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan), var(--violet) 58%, transparent);
}

.page-about .axis-node {
  position: relative;
  padding-bottom: 26px;
}

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

.page-about .axis-dot {
  position: absolute;
  left: -26px;
  top: 5px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(35, 240, 230, 0.12);
}

.page-about .axis-year-lg {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--yellow);
}

.page-about .axis-head {
  margin: 4px 0 6px;
  font-size: 17px;
  font-weight: 700;
}

.page-about .axis-body {
  margin: 0;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--muted);
}

/* ---------- 合作 ---------- */

.page-about .partner-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: 24px;
}

.page-about .partner-card {
  padding: 20px 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(150deg, rgba(20, 29, 48, 0.86), rgba(11, 18, 32, 0.62));
  transition: border-color 0.2s ease;
}

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

.page-about .partner-card .card-title {
  margin: 0 0 8px;
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.4;
}

.page-about .partner-card .card-body {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--muted);
}

.page-about .partner-card--award {
  border-color: rgba(255, 212, 0, 0.36);
  background: linear-gradient(150deg, rgba(255, 212, 0, 0.08), rgba(11, 18, 32, 0.7));
}

/* ---------- 收尾 ---------- */

.page-about .join-panel {
  position: relative;
  margin-top: 24px;
  padding: clamp(22px, 3.4vw, 36px);
  border: 1px solid var(--line-cyan);
  border-radius: var(--r-xl);
  background:
    radial-gradient(92% 120% at 100% 0%, rgba(122, 59, 255, 0.34), transparent 62%),
    linear-gradient(140deg, rgba(11, 18, 32, 0.96), rgba(5, 7, 12, 0.96));
  overflow: hidden;
}

.page-about .join-text {
  margin: 0;
  max-width: 56ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.8;
}

.page-about .join-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.page-about .join-contact {
  margin: 20px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 响应式 ---------- */

@media (min-width: 620px) {
  .page-about .stat-strip {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (min-width: 760px) {
  .page-about .crew-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .about-hero-inner {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: end;
  }
}

@media (min-width: 1024px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
  }

  .page-about .about-rail-inner {
    position: sticky;
    top: 104px;
  }

  .page-about .axis-nav {
    display: grid;
    gap: 2px;
    overflow: visible;
    padding: 0;
    border-left: 1px solid var(--line-cyan);
  }

  .page-about .axis-link {
    position: relative;
    padding: 9px 0 9px 16px;
    border: 0;
    border-radius: 0;
    background: none;
    font-size: 13.5px;
    color: var(--muted);
  }

  .page-about .axis-link::before {
    content: "";
    position: absolute;
    left: -1px;
    top: 50%;
    width: 2px;
    height: 0;
    background: var(--cyan);
    transform: translateY(-50%);
    transition: height 0.2s ease;
  }

  .page-about .axis-link:hover,
  .page-about .axis-link:focus-visible {
    background: none;
    color: var(--text);
  }

  .page-about .axis-link:hover::before,
  .page-about .axis-link:focus-visible::before {
    height: 62%;
  }

  .page-about .about-para {
    font-size: 15.5px;
  }
}

@media (min-width: 1180px) {
  .page-about .archive-wall {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .archive-card:nth-child(3n + 2) {
    transform: translateY(16px);
  }

  .page-about .archive-card:nth-child(3n + 3) {
    transform: translateY(32px);
  }
}

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

  .page-about .archive-card:nth-child(3n + 2),
  .page-about .archive-card:nth-child(3n + 3) {
    transform: none;
  }
}