.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 34px 0 48px;
  background:
    radial-gradient(760px 320px at 84% -8%, rgba(122, 77, 255, 0.22), transparent 64%),
    radial-gradient(620px 300px at 2% 4%, rgba(43, 245, 216, 0.12), transparent 62%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(36, 48, 74, 0.55) 1px, transparent 1px),
    linear-gradient(90deg, rgba(36, 48, 74, 0.55) 1px, transparent 1px);
  background-size: 96px 96px;
  opacity: 0.5;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, rgba(0, 0, 0, 0.25) 62%, transparent 100%);
  mask-image: linear-gradient(180deg, #000 0%, rgba(0, 0, 0, 0.25) 62%, transparent 100%);
}

.page-about .about-hero .container {
  position: relative;
  z-index: 1;
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
  max-width: 20ch;
  font-family: var(--font-head);
  font-size: clamp(30px, 6.4vw, 56px);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: 0.02em;
  color: var(--c-text);
  text-shadow: 0 0 22px rgba(43, 245, 216, 0.18);
}

.page-about .about-hero-lead {
  margin: 20px 0 0;
  max-width: 64ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-muted);
}

.page-about .about-hero-facts {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--c-line);
  border: 1px solid var(--c-line);
}

.page-about .about-hero-facts li {
  min-width: 0;
  display: grid;
  gap: 6px;
  padding: 14px 14px 16px;
  background: var(--c-void);
}

.page-about .fact-num {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: 0.02em;
  color: var(--c-cyan);
}

.page-about .fact-label {
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--c-muted);
}

.page-about .section {
  padding: 52px 0;
}

.page-about .section-head {
  max-width: 64ch;
}

.page-about .section-title {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-size: clamp(22px, 4.6vw, 34px);
  font-weight: 800;
  line-height: 1.24;
  letter-spacing: 0.01em;
  color: var(--c-text);
}

.page-about .section-lead {
  margin: 12px 0 0;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--c-muted);
}

/* ---------- 01 空间 ---------- */

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

.page-about .about-spec {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--c-line);
}

.page-about .about-spec li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 13px 0;
  border-bottom: 1px solid var(--c-line);
}

.page-about .spec-k {
  font-size: 14px;
  color: var(--c-muted);
  letter-spacing: 0.02em;
}

.page-about .spec-v {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--c-text);
  text-align: right;
}

.page-about .about-space-body p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-text);
}

.page-about .about-space-body p:last-of-type {
  margin-bottom: 0;
}

/* ---------- 图片框 ---------- */

.page-about .about-shot {
  position: relative;
  margin: 24px 0 0;
  border: 1px solid var(--c-line);
  background: var(--c-graphite);
  overflow: hidden;
}

.page-about .about-shot::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 72px;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(43, 245, 216, 0.1), transparent);
}

.page-about .about-shot img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.page-about .about-shot figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--c-line);
  font-size: 12.5px;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--c-muted);
}

/* ---------- 02 团队 ---------- */

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

.page-about .about-team-body p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-text);
}

.page-about .about-roles {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
}

.page-about .about-roles li {
  display: grid;
  gap: 5px;
  padding: 13px 0;
  border-top: 1px solid var(--c-line);
}

.page-about .about-roles li:last-child {
  border-bottom: 1px solid var(--c-line);
}

.page-about .role-name {
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--c-cyan);
}

.page-about .role-desc {
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--c-muted);
}

.page-about .about-shot--team {
  margin-top: 0;
}

/* ---------- 03 赛季历程 ---------- */

.page-about .about-timeline-wrap {
  display: grid;
  gap: 26px;
  margin-top: 28px;
}

.page-about .about-years {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-years li {
  flex: 0 0 auto;
}

.page-about .about-years a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border: 1px solid var(--c-line);
  background: var(--c-graphite);
  color: var(--c-muted);
  font-family: var(--font-mono);
  font-size: 13.5px;
  letter-spacing: 0.06em;
  text-decoration: none;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-about .about-years a::before {
  content: "";
  flex: 0 0 auto;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.75;
}

.page-about .about-years a:hover,
.page-about .about-years a:focus-visible {
  color: var(--c-cyan);
  border-color: var(--c-cyan);
  background: var(--c-indigo);
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-timeline > li {
  padding: 20px 0 24px;
  border-top: 1px solid var(--c-line);
  scroll-margin-top: 150px;
}

.page-about .about-timeline > li:last-child {
  border-bottom: 1px solid var(--c-line);
}

.page-about .milestone {
  display: grid;
  gap: 8px;
}

.page-about .milestone-head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .milestone-year {
  font-family: var(--font-mono);
  font-size: 13.5px;
  letter-spacing: 0.18em;
  color: var(--c-cyan);
}

.page-about .milestone--done .milestone-year {
  color: var(--c-green);
}

.page-about .milestone--live .milestone-year {
  color: var(--c-orange);
}

.page-about .milestone-title {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(17px, 3.2vw, 21px);
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--c-text);
  transition: color 0.2s var(--ease);
}

.page-about .about-timeline > li:hover .milestone-title,
.page-about .about-timeline > li:focus-within .milestone-title {
  color: var(--c-cyan);
}

.page-about .milestone-text {
  margin: 0;
  max-width: 68ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--c-muted);
}

.page-about .about-history-more {
  margin: 24px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--c-muted);
}

.page-about .about-inline-link {
  margin-left: 6px;
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 245, 216, 0.4);
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  color: var(--c-violet-soft);
  border-color: var(--c-violet-soft);
}

/* ---------- 04 合作生态 ---------- */

.page-about .about-partners {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
}

.page-about .about-partners > li {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 14px;
  padding: 20px 0;
  border-top: 1px solid var(--c-line);
}

.page-about .about-partners > li:last-child {
  border-bottom: 1px solid var(--c-line);
}

.page-about .partner-num {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--c-violet-soft);
}

.page-about .partner-body {
  min-width: 0;
}

.page-about .partner-title {
  margin: 0 0 7px;
  font-family: var(--font-head);
  font-size: 16.5px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--c-text);
}

.page-about .partner-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-muted);
}

/* ---------- 05 硬件 ---------- */

.page-about .about-hardware {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
}

.page-about .about-hardware > li {
  display: grid;
  gap: 6px;
  padding: 17px 0;
  border-bottom: 1px solid var(--c-line);
}

.page-about .about-hardware > li:first-child {
  border-top: 1px solid var(--c-line);
}

.page-about .hw-key {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--c-muted);
}

.page-about .hw-val {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--c-cyan);
}

.page-about .hw-note {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--c-muted);
}

/* ---------- 06 到访 ---------- */

.page-about .about-visit-panel {
  position: relative;
  overflow: hidden;
  display: grid;
  gap: 24px;
  padding: 30px 22px 34px;
  border: 1px solid var(--c-line);
  background:
    linear-gradient(135deg, rgba(43, 245, 216, 0.1), transparent 54%),
    var(--c-graphite);
  box-shadow: var(--shadow-panel);
}

.page-about .about-visit-panel::after {
  content: "";
  position: absolute;
  top: -70px;
  right: -70px;
  width: 220px;
  height: 220px;
  transform: rotate(6deg);
  background: linear-gradient(135deg, rgba(122, 77, 255, 0.34), transparent 70%);
  pointer-events: none;
}

.page-about .about-visit-copy {
  position: relative;
  z-index: 1;
}

.page-about .about-visit-title {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-size: clamp(21px, 4.2vw, 30px);
  font-weight: 800;
  line-height: 1.26;
  letter-spacing: 0.01em;
  color: var(--c-text);
}

.page-about .about-visit-text {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--c-muted);
}

.page-about .about-visit-actions {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 断点 ---------- */

@media (min-width: 720px) {
  .page-about .about-hero-facts {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .fact-num {
    font-size: 22px;
  }

  .page-about .about-partners > li {
    grid-template-columns: 60px minmax(0, 1fr);
    gap: 20px;
  }

  .page-about .about-hardware > li {
    grid-template-columns: 150px 240px minmax(0, 1fr);
    align-items: baseline;
    gap: 22px;
  }

  .page-about .about-visit-panel {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    padding: 38px 34px 42px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 52px 0 68px;
  }

  .page-about .section {
    padding: 76px 0;
  }

  .page-about .about-space-grid {
    grid-template-columns: 5fr 7fr;
    gap: 52px;
    align-items: start;
    margin-top: 42px;
  }

  .page-about .about-team-grid {
    grid-template-columns: 7fr 5fr;
    gap: 52px;
    align-items: start;
    margin-top: 42px;
  }

  .page-about .about-timeline-wrap {
    grid-template-columns: 2fr 8fr;
    gap: 56px;
    align-items: start;
    margin-top: 42px;
  }

  .page-about .about-years {
    position: sticky;
    top: 128px;
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding: 2px 0 2px 0;
    border-left: 1px solid var(--c-line);
  }

  .page-about .about-years li {
    flex: 0 0 auto;
  }

  .page-about .about-years a {
    position: relative;
    width: 100%;
    padding: 11px 0 11px 24px;
    border: 0;
    background: none;
    font-size: 16px;
    letter-spacing: 0.08em;
  }

  .page-about .about-years a::before {
    position: absolute;
    left: -4px;
    top: 50%;
    width: 7px;
    height: 7px;
    transform: translateY(-50%);
    background: var(--c-line);
    opacity: 1;
    transition: background-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
  }

  .page-about .about-years a::after {
    content: attr(data-key);
    position: absolute;
    left: 96px;
    top: 50%;
    transform: translateY(-50%);
    font-family: var(--font-body);
    font-size: 11.5px;
    letter-spacing: 0.06em;
    white-space: nowrap;
    color: var(--c-muted);
    opacity: 0;
    transition: opacity 0.2s var(--ease);
  }

  .page-about .about-years a:hover::after,
  .page-about .about-years a:focus-visible::after {
    opacity: 1;
  }

  .page-about .about-years a:hover::before,
  .page-about .about-years a:focus-visible::before {
    background: var(--c-cyan);
    box-shadow: var(--glow-cyan);
  }

  .page-about .about-timeline > li {
    padding: 24px 0 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-years a,
  .page-about .about-years a::before,
  .page-about .about-years a::after,
  .page-about .milestone-title,
  .page-about .about-inline-link {
    transition: none;
  }
}