.page-about {
  --about-rail: 208px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  margin-top: clamp(14px, 2.5vw, 26px);
  padding: clamp(22px, 4vw, 46px) clamp(18px, 3.6vw, 44px) clamp(20px, 3.4vw, 38px);
  border: 1px solid var(--line);
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(86, 224, 210, 0.12), transparent 56%),
    radial-gradient(90% 120% at 0% 100%, rgba(140, 123, 255, 0.10), transparent 60%),
    linear-gradient(160deg, var(--moss), var(--ink) 74%);
  box-shadow: 9px 9px 0 rgba(43, 61, 72, 0.32);
  overflow: hidden;
}

.page-about .about-hero-frame {
  position: absolute;
  inset: 10px;
  border: 1px solid rgba(236, 231, 218, 0.08);
  pointer-events: none;
}

.page-about .about-hero-frame::before,
.page-about .about-hero-frame::after {
  content: "";
  position: absolute;
  width: 18px;
  height: 18px;
  border-top: 1px solid var(--lime);
  border-left: 1px solid var(--lime);
  top: 0;
  left: 0;
}

.page-about .about-hero-frame::after {
  top: auto;
  left: auto;
  bottom: 0;
  right: 0;
  border-top: 0;
  border-left: 0;
  border-bottom: 1px solid var(--lime);
  border-right: 1px solid var(--lime);
}

.page-about .about-hero h1 {
  margin: 10px 0 14px;
  font-family: var(--font-display);
  font-size: clamp(2rem, 6.4vw, 3.5rem);
  line-height: 1.06;
  letter-spacing: -0.01em;
  color: var(--paper);
  max-width: 20ch;
}

.page-about .about-hero-lead {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(0.98rem, 2vw, 1.08rem);
  line-height: 1.8;
  color: var(--body-text);
}

.page-about .about-hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 12px;
  margin: clamp(20px, 3.4vw, 32px) 0 0;
  padding: clamp(14px, 2.4vw, 20px) 0 0;
  list-style: none;
  border-top: 1px dashed var(--line-soft);
}

.page-about .about-hero-stats li {
  padding-left: 12px;
  border-left: 2px solid var(--steel);
}

.page-about .about-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 4vw, 2rem);
  line-height: 1.1;
  color: var(--lime);
}

.page-about .about-stat-key {
  display: block;
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--sage);
}

/* ---------- 布局 ---------- */
.page-about .about-layout {
  display: grid;
  gap: clamp(16px, 3vw, 30px);
  margin-top: clamp(22px, 4vw, 40px);
}

.page-about .about-rail {
  align-self: start;
  padding: 14px 12px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(14, 42, 35, 0.72), rgba(7, 11, 10, 0.72));
}

.page-about .about-rail-title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--sage);
}

.page-about .about-rail-list {
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-rail-link {
  position: relative;
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 8px 4px 9px 0;
  border-bottom: 1px solid rgba(236, 231, 218, 0.07);
  color: var(--paper);
  font-size: 14px;
  text-decoration: none;
  transition: color 0.18s ease;
}

.page-about .about-rail-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 14px;
  height: 2px;
  background: var(--steel);
  transition: width 0.2s ease, background-color 0.2s ease;
}

.page-about .about-rail-link:hover {
  color: var(--lime);
}

.page-about .about-rail-link:hover::after {
  width: 100%;
  background: var(--lime);
}

.page-about .rail-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--sage);
  transition: color 0.18s ease;
}

.page-about .about-rail-link:hover .rail-num {
  color: var(--lime);
}

.page-about .about-flow {
  display: grid;
  gap: clamp(16px, 2.6vw, 26px);
  min-width: 0;
}

/* ---------- 面板 ---------- */
.page-about .about-panel {
  padding: clamp(18px, 3vw, 34px);
  scroll-margin-top: 96px;
}

.page-about .about-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  margin-bottom: clamp(12px, 2vw, 18px);
}

.page-about .about-idx {
  background: var(--lime);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1;
  padding: 7px 8px;
}

.page-about .about-h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3.6vw, 2rem);
  line-height: 1.12;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-about .about-text p {
  margin: 0 0 12px;
  max-width: 64ch;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--body-text);
}

.page-about .about-text p:last-child {
  margin-bottom: 0;
}

/* ---------- 场景列表 ---------- */
.page-about .about-scene-list {
  display: grid;
  gap: 10px;
  margin: clamp(14px, 2.4vw, 20px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-scene-list li {
  padding: 12px 14px;
  border: 1px solid var(--line-soft);
  border-left: 2px solid var(--ice);
  background: rgba(23, 28, 26, 0.7);
}

.page-about .scene-tag {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--ice);
}

.page-about .about-scene-list p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--body-text);
}

/* ---------- 双栏 ---------- */
.page-about .about-split {
  display: grid;
  gap: clamp(16px, 2.8vw, 26px);
  min-width: 0;
}

/* ---------- 团队卡 ---------- */
.page-about .team-grid {
  display: grid;
  gap: 12px;
  margin-top: 14px;
}

.page-about .team-card {
  padding: 14px 15px 16px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(23, 28, 26, 0.96), rgba(14, 42, 35, 0.6));
  box-shadow: 4px 4px 0 rgba(43, 61, 72, 0.28);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.page-about .team-card:hover {
  border-color: rgba(200, 255, 61, 0.55);
}

.page-about .team-tag {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--ice);
}

.page-about .team-name {
  margin: 6px 0 8px;
  font-size: 1rem;
  line-height: 1.3;
  color: var(--paper);
}

.page-about .team-desc {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--body-text);
}

.page-about .about-note {
  margin: 14px 0 0;
  padding: 12px 14px;
  border-left: 2px solid var(--orange);
  background: rgba(255, 107, 44, 0.08);
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--body-text);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 0;
  min-width: 0;
}

.page-about .about-cap {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--sage);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0 0 0 24px;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 6px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--ice), var(--steel) 62%, rgba(43, 61, 72, 0.2));
}

.page-about .tl-item {
  position: relative;
  padding-bottom: 2px;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 6px;
  width: 9px;
  height: 9px;
  background: var(--ink);
  border: 1px solid var(--ice);
  transform: rotate(45deg);
}

.page-about .tl-item--now::before {
  border-color: var(--orange);
  background: var(--orange);
  box-shadow: 0 0 0 3px rgba(255, 107, 44, 0.18);
}

.page-about .tl-ver {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--ice);
}

.page-about .tl-item--now .tl-ver {
  color: var(--orange);
}

.page-about .tl-title {
  margin: 4px 0 6px;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .tl-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.74;
  color: var(--body-text);
}

/* ---------- 合作生态 ---------- */
.page-about .partner-grid {
  display: grid;
  gap: 12px;
  margin-top: 14px;
}

.page-about .partner-card {
  padding: 16px;
  border: 1px solid var(--line);
  background: rgba(23, 28, 26, 0.72);
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.page-about .partner-card:hover,
.page-about .partner-card:focus-within {
  border-color: var(--lime);
  background: rgba(14, 42, 35, 0.8);
}

.page-about .partner-num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 1.7rem;
  line-height: 1;
  color: var(--lime);
}

.page-about .partner-name {
  margin: 8px 0 8px;
  font-size: 15px;
  color: var(--paper);
}

.page-about .partner-desc {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--body-text);
}

/* ---------- 区域服务 ---------- */
.page-about .about-region-grid {
  display: grid;
  gap: clamp(16px, 2.8vw, 26px);
  min-width: 0;
}

.page-about .about-region-main {
  min-width: 0;
}

.page-about .region-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.page-about .region-stat {
  padding-top: 8px;
  border-top: 1px solid var(--line-soft);
}

.page-about .region-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.15rem, 3.2vw, 1.4rem);
  line-height: 1.15;
  color: var(--paper);
}

.page-about .region-key {
  display: block;
  margin-top: 4px;
  font-size: 11.5px;
  line-height: 1.5;
  letter-spacing: 0.06em;
  color: var(--sage);
}

.page-about .about-grid-svg {
  display: block;
  width: 100%;
  max-width: 260px;
  height: auto;
  margin-top: 18px;
  color: rgba(127, 145, 137, 0.5);
}

/* ---------- 收尾 ---------- */
.page-about .about-panel--cta {
  background:
    radial-gradient(110% 150% at 0% 0%, rgba(200, 255, 61, 0.09), transparent 58%),
    linear-gradient(150deg, rgba(14, 42, 35, 0.9), rgba(7, 11, 10, 0.9));
}

.page-about .about-cta {
  display: grid;
  gap: 16px;
}

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

.page-about .about-cta-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-cta-links a {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.03em;
  color: var(--ice);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.page-about .about-cta-links a:hover {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

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

.page-about .about-rail-link:focus-visible,
.page-about .about-cta-links a:focus-visible,
.page-about .about-actions a:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-scene-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .team-grid,
  .page-about .partner-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 860px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 1.24fr) minmax(0, 0.76fr);
    align-items: start;
  }

  .page-about .about-split--timeline {
    grid-template-columns: minmax(0, 1fr) minmax(0, 300px);
  }

  .page-about .about-region-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }

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

@media (min-width: 960px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
  }

  .page-about .about-rail {
    position: sticky;
    top: 88px;
  }

  .page-about .about-rail-link {
    font-size: 13.5px;
  }
}