.page-about {
  padding-top: calc(var(--header-h) + 20px);
  padding-bottom: 0;
  max-width: 100%;
}

.page-about .section {
  padding-top: clamp(38px, 6vw, 62px);
}

.page-about .eyebrow {
  margin: 0 0 10px;
  color: var(--muted);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  padding-bottom: clamp(40px, 7vw, 72px);
}

.page-about .about-hero-grid {
  display: grid;
  gap: 34px;
}

.page-about .breadcrumbs {
  margin-bottom: 20px;
}

.page-about .about-hero h1 {
  margin: 0 0 18px;
  font-family: var(--serif);
  font-size: clamp(32px, 6.2vw, 58px);
  line-height: 1.12;
  letter-spacing: -0.015em;
  font-weight: 800;
  color: var(--white);
}

.page-about .about-lede {
  margin: 0;
  max-width: 48ch;
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.78;
  color: rgba(245, 247, 250, 0.78);
}

.page-about .about-figures {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-strong);
  border: 2px solid var(--line-strong);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .about-figures li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 13px 14px;
  background: var(--panel);
}

.page-about .fig-num {
  display: block;
  font-family: var(--num);
  font-size: clamp(28px, 6.6vw, 42px);
  line-height: 0.95;
  letter-spacing: 0.02em;
}

.page-about .fig-home { color: var(--home); }
.page-about .fig-away { color: var(--away); }
.page-about .fig-white { color: var(--white); }

.page-about .fig-label {
  font-size: 12px;
  line-height: 1.45;
  letter-spacing: 0.02em;
  color: var(--muted);
}

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

.page-about .about-hero-visual {
  margin: 0;
  padding: 14px;
  border: 3px solid var(--line-strong);
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, var(--panel-2), var(--ink) 72%);
  box-shadow: var(--shadow-hard);
}

.page-about .about-pitch {
  display: block;
  width: 100%;
  height: auto;
  border-radius: calc(var(--radius-lg) - 12px);
}

.page-about .about-hero-caption {
  margin: 12px 2px 0;
  color: var(--muted);
}

/* ---------- 时间线 ---------- */

.page-about .about-start-figure {
  margin: 0 0 38px;
}

.page-about .media-frame img,
.page-about .about-start-figure img,
.page-about .team-figure img,
.page-about .eco-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 44px;
  display: grid;
  gap: 20px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 12px;
  top: 14px;
  bottom: 14px;
  width: 3px;
  border-radius: 3px;
  background: linear-gradient(180deg, var(--home) 0%, var(--home) 38%, var(--away) 62%, var(--away) 100%);
}

.page-about .tl-item {
  position: relative;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -38px;
  top: 20px;
  width: 14px;
  height: 14px;
  box-sizing: border-box;
  border: 3px solid var(--home);
  border-radius: 50%;
  background: var(--ink);
}

.page-about .tl-card {
  position: relative;
  padding: 18px 20px 20px;
  border: 2px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--panel);
  box-shadow: var(--shadow-hard);
  transition: transform 0.28s ease, border-color 0.28s ease;
}

.page-about .tl-card:hover {
  transform: translateY(-3px);
  border-color: var(--line-strong);
}

.page-about .tl-year {
  margin: 0 0 8px;
  font-family: var(--num);
  font-size: 26px;
  line-height: 1;
  letter-spacing: 0.06em;
  color: var(--home);
}

.page-about .tl-title {
  margin: 0 0 8px;
  font-family: var(--serif);
  font-size: clamp(19px, 2.4vw, 23px);
  line-height: 1.36;
  font-weight: 700;
  color: var(--white);
}

.page-about .tl-text {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.76;
  color: rgba(245, 247, 250, 0.72);
}

/* ---------- 团队 ---------- */

.page-about .team-layout {
  display: grid;
  gap: 26px;
}

.page-about .team-tabs {
  overflow: hidden;
  border: 3px solid var(--line-strong);
  border-radius: var(--radius-lg);
  background: var(--panel);
  box-shadow: var(--shadow-hard);
}

.page-about .team-tabs .tabs {
  display: flex;
  background: var(--panel-2);
  border-bottom: 3px solid var(--line-strong);
}

.page-about .team-tabs .tab {
  flex: 1 1 0;
  min-width: 0;
  padding: 15px 8px;
  border: 0;
  border-right: 2px solid var(--line);
  background: transparent;
  color: var(--muted);
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.03em;
  cursor: pointer;
  transition: color 0.2s ease, background 0.2s ease;
}

.page-about .team-tabs .tab:last-child {
  border-right: 0;
}

.page-about .team-tabs .tab:hover {
  color: var(--white);
}

.page-about .team-tabs .tab[aria-selected="true"] {
  background: var(--panel);
  color: var(--white);
  box-shadow: inset 0 -4px 0 var(--home);
}

.page-about .team-tabs .tab:focus-visible {
  outline: 2px solid var(--glow);
  outline-offset: -3px;
}

.page-about .tab-panel {
  padding: 24px 22px 26px;
}

.page-about .tab-panel[hidden] {
  display: none;
}

.page-about .tab-panel h3 {
  margin: 0 0 12px;
  font-family: var(--serif);
  font-size: clamp(19px, 2.4vw, 24px);
  line-height: 1.36;
  font-weight: 700;
  color: var(--white);
}

.page-about .tab-panel p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.76;
  color: rgba(245, 247, 250, 0.74);
}

.page-about .tab-panel ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .tab-panel li {
  position: relative;
  padding-left: 18px;
  font-size: 14.5px;
  line-height: 1.6;
  color: rgba(245, 247, 250, 0.86);
}

.page-about .tab-panel li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 8px;
  height: 2px;
  background: var(--away);
}

.page-about .team-figure,
.page-about .eco-figure {
  margin: 0;
}

/* ---------- 主客场语义 ---------- */

.page-about .duo-grid {
  display: grid;
  gap: 18px;
}

.page-about .duo-card {
  position: relative;
  overflow: hidden;
  padding: 26px 22px 24px;
  border: 3px solid var(--line-strong);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-hard);
}

.page-about .duo-home {
  border-left: 8px solid var(--home);
  background:
    radial-gradient(120% 92% at 0% 0%, rgba(255, 107, 44, 0.22), transparent 62%),
    var(--panel);
}

.page-about .duo-away {
  border-left: 8px solid var(--away);
  background:
    radial-gradient(120% 92% at 100% 0%, rgba(46, 212, 232, 0.2), transparent 62%),
    var(--panel);
}

.page-about .duo-tag {
  margin: 0 0 10px;
  color: var(--muted);
}

.page-about .duo-title {
  margin: 0 0 12px;
  font-family: var(--serif);
  font-size: clamp(30px, 5.4vw, 42px);
  line-height: 1.1;
  font-weight: 800;
}

.page-about .duo-home .duo-title { color: var(--home); }
.page-about .duo-away .duo-title { color: var(--away); }

.page-about .duo-text {
  margin: 0 0 16px;
  font-size: 15.5px;
  line-height: 1.76;
  color: rgba(245, 247, 250, 0.76);
}

.page-about .duo-list {
  list-style: none;
  margin: 0;
  padding: 16px 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 9px;
}

.page-about .duo-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.6;
  color: rgba(245, 247, 250, 0.86);
}

.page-about .duo-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.page-about .duo-home .duo-list li::before { background: var(--home); }
.page-about .duo-away .duo-list li::before { background: var(--away); }

.page-about .duo-note {
  margin: 22px 0 0;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 18px 20px;
  border: 2px dashed var(--line-strong);
  border-radius: var(--radius-md);
  background: rgba(198, 255, 58, 0.05);
  font-size: 15px;
  line-height: 1.72;
  color: rgba(245, 247, 250, 0.82);
}

.page-about .glow-dot {
  flex: 0 0 auto;
  width: 12px;
  height: 12px;
  margin-top: 6px;
  border-radius: 50%;
  background: var(--glow);
  box-shadow: 0 0 0 5px rgba(198, 255, 58, 0.16);
}

/* ---------- 时间承诺 ---------- */

.page-about .pledge-grid {
  display: grid;
  gap: 18px;
}

.page-about .pledge-card {
  padding: 26px 22px 28px;
  border: 3px solid var(--line-strong);
  border-radius: var(--radius-lg);
  background: var(--panel);
  box-shadow: var(--shadow-hard);
}

.page-about .pledge-card-glow {
  background:
    radial-gradient(110% 90% at 100% 0%, rgba(198, 255, 58, 0.12), transparent 60%),
    var(--panel);
}

.page-about .pledge-num {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-family: var(--num);
  font-size: clamp(62px, 13vw, 104px);
  line-height: 0.86;
  letter-spacing: 0.01em;
  color: var(--home);
}

.page-about .pledge-card-glow .pledge-num {
  color: var(--glow);
}

.page-about .pledge-unit {
  font-family: var(--sans);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-about .pledge-title {
  margin: 18px 0 10px;
  font-family: var(--serif);
  font-size: clamp(19px, 2.6vw, 24px);
  line-height: 1.36;
  font-weight: 700;
  color: var(--white);
}

.page-about .pledge-text {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.76;
  color: rgba(245, 247, 250, 0.74);
}

/* ---------- 合作生态 ---------- */

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

.page-about .eco-copy p {
  margin: 0 0 22px;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(245, 247, 250, 0.78);
}

.page-about .eco-stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-strong);
  border: 2px solid var(--line-strong);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .eco-stats li {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 16px 14px;
  background: var(--panel);
}

.page-about .eco-num {
  font-family: var(--num);
  font-size: clamp(26px, 5.4vw, 34px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--away);
}

.page-about .eco-stats li:nth-child(2) .eco-num { color: var(--home); }
.page-about .eco-stats li:nth-child(3) .eco-num { color: var(--white); }
.page-about .eco-stats li:nth-child(4) .eco-num { color: var(--away); }

.page-about .eco-label {
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--muted);
}

/* ---------- 底部行动区 ---------- */

.page-about .about-cta {
  margin-top: 26px;
  padding: clamp(32px, 6vw, 58px) 0;
  border-top: 3px solid var(--line-strong);
  border-bottom: 3px solid var(--line-strong);
  background:
    radial-gradient(90% 140% at 12% 0%, rgba(255, 107, 44, 0.2), transparent 60%),
    radial-gradient(90% 140% at 88% 100%, rgba(46, 212, 232, 0.18), transparent 60%),
    var(--panel);
}

.page-about .about-cta-inner {
  display: grid;
  gap: 22px;
}

.page-about .about-cta-title {
  margin: 0 0 10px;
  font-family: var(--serif);
  font-size: clamp(24px, 3.8vw, 34px);
  line-height: 1.3;
  font-weight: 800;
  color: var(--white);
}

.page-about .about-cta-text {
  margin: 0;
  max-width: 52ch;
  font-size: 15.5px;
  line-height: 1.76;
  color: rgba(245, 247, 250, 0.76);
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-about .about-timeline {
    padding-left: 64px;
  }

  .page-about .about-timeline::before {
    left: 20px;
  }

  .page-about .tl-item::before {
    left: -50px;
  }
}

@media (min-width: 820px) {
  .page-about .duo-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
  }

  .page-about .pledge-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
  }
}

@media (min-width: 880px) {
  .page-about .about-cta-inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 34px;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    align-items: center;
    gap: 48px;
  }

  .page-about .eco-layout {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
    gap: 40px;
  }
}

@media (min-width: 1024px) {
  .page-about .team-layout {
    grid-template-columns: minmax(0, 1.42fr) minmax(0, 0.58fr);
    align-items: stretch;
    gap: 26px;
  }

  .page-about .team-figure {
    display: flex;
    flex-direction: column;
  }

  .page-about .team-figure img {
    height: 100%;
    object-fit: cover;
  }
}

@media (max-width: 419px) {
  .page-about .about-figures li {
    padding: 13px 9px 12px;
  }

  .page-about .fig-label {
    font-size: 11px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl-card {
    transition: none;
  }

  .page-about .tl-card:hover {
    transform: none;
  }
}