.page-about {
  --about-hair: rgba(42, 52, 61, 0.72);
  --about-volt-soft: rgba(200, 255, 61, 0.1);
  --about-night-fade: linear-gradient(180deg, #0E1723 0%, #07090B 100%);
}

.page-about .about-hero__inner {
  padding: 34px 0 40px;
}

.page-about .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--dim);
  margin-bottom: 28px;
}

.page-about .breadcrumb a {
  color: var(--muted);
  text-decoration: none;
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--volt);
}

.page-about .about-hero__label {
  display: inline-block;
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--volt);
  border-bottom: 1px solid var(--about-volt-soft);
  padding-bottom: 6px;
}

.page-about .about-hero__title {
  margin: 0 0 20px;
  max-width: 16em;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 7.4vw, 60px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-about .about-hero__lead {
  margin: 0;
  max-width: 60ch;
  font-size: 16.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 38px 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-hero__stats .stat {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 16px 20px;
  background: var(--ink);
}

.page-about .about-hero__stats .stat__num {
  font-family: var(--font-mono);
  font-size: 26px;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--volt);
}

.page-about .stat__unit {
  font-size: 18px;
  margin-left: 2px;
}

.page-about .about-hero__stats .stat__label {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 主体双栏 ---------- */

.page-about .about-layout {
  display: grid;
  align-items: start;
}

.page-about .about-rail {
  border-bottom: 1px solid var(--line);
  padding: 14px 0 16px;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-rail::-webkit-scrollbar {
  display: none;
}

.page-about .about-rail .battle-rail__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--dim);
  text-transform: uppercase;
}

.page-about .about-rail__nav {
  display: flex;
  gap: 10px;
  white-space: nowrap;
}

.page-about .about-rail .battle-rail__link {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--muted);
  text-decoration: none;
  border: 1px solid var(--line);
  padding: 7px 12px;
  background: var(--panel);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-rail .battle-rail__link:hover,
.page-about .about-rail .battle-rail__link:focus-visible {
  color: var(--volt);
  border-color: var(--volt);
}

.page-about .about-sec {
  padding: 42px 0 10px;
}

/* ---------- 章节标题 ---------- */

.page-about .sec-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 14px;
  border-top: 1px solid var(--line);
  padding-top: 18px;
  margin-bottom: 26px;
}

.page-about .sec-head__idx {
  grid-row: 1 / span 2;
  padding-top: 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--volt);
}

.page-about .sec-head__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 5.4vw, 32px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-about .sec-head__desc {
  margin: 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 时间轴 ---------- */

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

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 6px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, var(--volt) 0%, var(--line) 60%, transparent 100%);
}

.page-about .timeline__item {
  position: relative;
  padding: 0 0 30px 30px;
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: 1px;
  top: 5px;
  width: 9px;
  height: 9px;
  background: var(--ink);
  border: 1px solid var(--volt);
}

.page-about .timeline__year {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--volt);
}

.page-about .timeline__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  letter-spacing: 0.01em;
  color: var(--text);
}

.page-about .timeline__card p {
  margin: 0;
  max-width: 58ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 图片 ---------- */

.page-about .about-figure {
  margin: 30px 0 8px;
  border: 1px solid var(--line);
  background: var(--night);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.04);
}

.page-about .about-figure .media-frame__cap {
  border-top: 1px solid var(--line);
  padding: 11px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--dim);
}

/* ---------- 流程 ---------- */

.page-about .flow {
  display: grid;
  gap: 12px;
  margin-top: 30px;
}

.page-about .flow__step {
  border: 1px solid var(--line);
  border-left: 3px solid var(--volt);
  background: var(--panel);
  padding: 18px 18px 20px;
}

.page-about .flow__idx {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  color: var(--volt);
}

.page-about .flow__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  color: var(--text);
}

.page-about .flow__step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 全宽数据横幅 ---------- */

.page-about .about-band {
  margin-top: 34px;
  padding: 26px 20px 24px;
  background: var(--about-night-fade);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  position: relative;
}

.page-about .about-band::before {
  content: "";
  position: absolute;
  left: 0;
  top: -1px;
  width: 68px;
  height: 3px;
  background: var(--volt);
}

.page-about .about-band__num {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 4.6vw, 28px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--volt);
}

.page-about .about-band__cap {
  margin: 0;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 覆盖 ---------- */

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

.page-about .coverage__figure {
  margin: 0;
}

.page-about .coverage__side {
  display: grid;
  gap: 20px;
}

.page-about .coverage__stat {
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 20px 18px 22px;
}

.page-about .coverage__num {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 40px;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--volt);
}

.page-about .coverage__stat p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

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

.page-about .coverage__list li {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 14px 16px;
  background: var(--ink);
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--muted);
}

.page-about .coverage__list .mono-label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--cyan);
  padding-top: 3px;
}

/* ---------- 生态 ---------- */

.page-about .eco {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .eco__col {
  background: var(--panel);
  padding: 22px 20px 24px;
}

.page-about .eco__num {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 42px;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--volt);
}

.page-about .eco__unit {
  font-size: 18px;
  margin-left: 4px;
  color: var(--muted);
}

.page-about .eco__cap {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16.5px;
  color: var(--text);
}

.page-about .eco__col p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 荣誉 ---------- */

.page-about .honor {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-about .honor__item {
  display: grid;
  gap: 10px;
  border: 1px solid var(--line);
  border-top: 2px solid var(--volt);
  background: var(--panel);
  padding: 20px 18px 22px;
}

.page-about .honor__item .tag {
  justify-self: start;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
}

.page-about .honor__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.4;
  color: var(--text);
}

.page-about .honor__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 联系 ---------- */

.page-about .about-cta {
  display: grid;
  gap: 24px;
  border: 1px solid var(--line);
  background: var(--about-night-fade);
  padding: 26px 20px 28px;
  position: relative;
}

.page-about .about-cta::after {
  content: "";
  position: absolute;
  right: 0;
  top: 0;
  width: 3px;
  height: 76px;
  background: var(--volt);
}

.page-about .about-cta__title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 4.6vw, 27px);
  line-height: 1.3;
  color: var(--text);
}

.page-about .about-cta__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .about-cta__list li {
  padding-left: 16px;
  position: relative;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

.page-about .about-cta__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  background: var(--volt);
}

.page-about .about-cta__list strong {
  color: var(--text);
  font-weight: 600;
}

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

.page-about .about-cta__actions .btn {
  text-decoration: none;
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  padding: 12px 20px;
  border: 1px solid var(--line);
  transition: background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-cta__actions .btn--volt {
  background: var(--volt);
  border-color: var(--volt);
  color: var(--ink);
}

.page-about .about-cta__actions .btn--volt:hover,
.page-about .about-cta__actions .btn--volt:focus-visible {
  background: var(--text);
  border-color: var(--text);
}

.page-about .about-cta__actions .btn--ghost {
  color: var(--muted);
}

.page-about .about-cta__actions .btn--ghost:hover,
.page-about .about-cta__actions .btn--ghost:focus-visible {
  color: var(--volt);
  border-color: var(--volt);
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about .about-hero__inner {
    padding: 46px 0 48px;
  }

  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

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

@media (min-width: 860px) {
  .page-about .about-sec {
    padding: 56px 0 14px;
  }

  .page-about .sec-head {
    gap: 6px 22px;
    margin-bottom: 32px;
  }

  .page-about .sec-head__idx {
    font-size: 15px;
  }

  .page-about .timeline::before {
    left: 96px;
    top: 8px;
  }

  .page-about .timeline__item {
    display: grid;
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 0 34px;
    padding: 0 0 34px;
  }

  .page-about .timeline__item::before {
    left: 92px;
    top: 6px;
  }

  .page-about .timeline__year {
    text-align: right;
    margin-bottom: 0;
    padding-top: 2px;
  }

  .page-about .coverage {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 36px;
    align-items: start;
  }

  .page-about .coverage__figure {
    margin: 0;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
    padding: 32px 30px 34px;
  }

  .page-about .about-cta__actions {
    flex-direction: column;
    align-items: stretch;
    min-width: 200px;
  }

  .page-about .about-cta__actions .btn {
    text-align: center;
  }
}

@media (min-width: 1024px) {
  .page-about .about-layout {
    grid-template-columns: 216px minmax(0, 1fr);
    gap: 0 52px;
  }

  .page-about .about-rail {
    position: sticky;
    top: 104px;
    border-bottom: 0;
    border-left: 1px solid var(--line);
    padding: 4px 0 4px 18px;
    overflow: visible;
    margin-top: 56px;
  }

  .page-about .about-rail__nav {
    flex-direction: column;
    gap: 0;
    white-space: normal;
  }

  .page-about .about-rail .battle-rail__link {
    border: 0;
    background: transparent;
    padding: 7px 0;
    font-size: 12.5px;
    line-height: 1.5;
    color: var(--dim);
    border-bottom: 1px solid transparent;
  }

  .page-about .about-rail .battle-rail__link:hover,
  .page-about .about-rail .battle-rail__link:focus-visible {
    color: var(--volt);
    border-bottom-color: var(--about-volt-soft);
  }
}

@media (min-width: 1180px) {
  .page-about .flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}