.page-about {
  padding-bottom: 72px;
}

.page-about .crumbs {
  margin-top: 20px;
}

/* ---------- 刊头 ---------- */
.page-about .about-mast {
  text-align: center;
  padding: 34px 0 4px;
  border-bottom: 2px solid var(--line);
}

.page-about .about-kicker {
  margin: 0 0 18px;
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-about .about-title {
  margin: 0 auto 18px;
  max-width: 18ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.05rem, 8vw, 4.2rem);
  line-height: 1.04;
  letter-spacing: -0.03em;
  color: var(--paper);
}

.page-about .about-lead {
  margin: 0 auto 30px;
  max-width: 60ch;
  font-size: clamp(0.98rem, 2.4vw, 1.08rem);
  line-height: 1.85;
  color: var(--steel);
}

.page-about .about-facts {
  list-style: none;
  margin: 0 auto 30px;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  background: var(--line);
  border: 2px solid var(--line);
  max-width: 820px;
  box-shadow: var(--shadow-hard);
}

.page-about .about-facts li {
  background: var(--panel);
  padding: 16px 10px;
  text-align: center;
}

.page-about .about-facts .k {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.42rem;
  font-weight: 700;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
}

.page-about .about-facts .v {
  display: block;
  margin-top: 5px;
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  color: var(--steel);
}

/* ---------- 横幅 ---------- */
.page-about .about-banner {
  margin: 30px 0 0;
}

.page-about .about-banner img,
.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  background: var(--graphite);
}

/* ---------- 主体栅格 ---------- */
.page-about .about-body {
  display: grid;
  gap: 28px;
  margin-top: 44px;
}

.page-about .about-toc {
  border-top: 2px solid var(--line);
  padding-top: 14px;
}

.page-about .about-toc__title {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--steel);
}

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

.page-about .about-toc__link {
  display: block;
  padding: 7px 10px;
  border: 2px solid var(--line);
  color: var(--steel);
  font-size: 12.5px;
  text-decoration: none;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease), background 0.16s var(--ease);
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible {
  color: var(--ink);
  background: var(--lime);
  border-color: var(--lime);
}

.page-about .about-toc__link:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* ---------- 章节 ---------- */
.page-about .about-sec {
  padding: 30px 0 6px;
  border-top: 2px solid var(--line);
}

.page-about .about-flow > .about-sec:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .sec-head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 18px;
}

.page-about .sec-num {
  font-size: 1.55rem;
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
  padding-top: 5px;
  font-variant-numeric: tabular-nums;
}

.page-about .sec-kicker {
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.22em;
  color: var(--steel);
}

.page-about .sec-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.45rem, 4.6vw, 2rem);
  letter-spacing: -0.015em;
  line-height: 1.16;
  color: var(--paper);
}

.page-about .about-p {
  margin: 0 0 16px;
  max-width: 66ch;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--steel);
}

.page-about .about-p a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-p a:hover {
  color: var(--lime);
}

/* ---------- 四块能力 ---------- */
.page-about .mods {
  list-style: none;
  margin: 20px 0 18px;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .mods__item {
  border: 2px solid var(--line);
  border-left: 5px solid var(--lime-dim);
  background: var(--panel);
  padding: 16px 16px 14px;
}

.page-about .mods__i {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--lime);
  margin-bottom: 8px;
}

.page-about .mods__t {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--paper);
}

.page-about .mods__d {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--steel);
}

/* ---------- 时间线 ---------- */
.page-about .tl {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  position: relative;
}

.page-about .tl__item {
  position: relative;
  padding-left: 30px;
  margin-bottom: 12px;
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 16px;
  width: 12px;
  height: 12px;
  background: var(--ink);
  border: 2px solid var(--lime);
  z-index: 1;
}

.page-about .tl__item::after {
  content: "";
  position: absolute;
  left: 9px;
  top: 16px;
  bottom: -12px;
  width: 2px;
  background: var(--line);
}

.page-about .tl__item:last-child::after {
  display: none;
}

.page-about .tl__summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding: 10px 14px;
  border: 2px solid var(--line);
  background: var(--panel);
  cursor: pointer;
  list-style: none;
  transition: border-color 0.16s var(--ease), background 0.16s var(--ease);
}

.page-about .tl__summary::-webkit-details-marker {
  display: none;
}

.page-about .tl__summary:hover {
  border-color: var(--lime-dim);
}

.page-about .tl__summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-about .tl__node[open] > .tl__summary {
  border-color: var(--lime);
  background: rgba(184, 255, 61, 0.07);
}

.page-about .tl__year {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

.page-about .tl__label {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.98rem;
  color: var(--paper);
}

.page-about .tl__summary::after {
  content: "＋";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--steel);
}

.page-about .tl__node[open] > .tl__summary::after {
  content: "－";
  color: var(--lime);
}

.page-about .tl__detail {
  padding: 12px 14px 4px;
  border-left: 2px solid var(--line);
  margin-top: 6px;
}

.page-about .tl__detail p {
  margin: 0 0 8px;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--steel);
}

.page-about .about-figure {
  margin: 24px 0 0;
}

/* ---------- 团队四象限 ---------- */
.page-about .team {
  display: grid;
  gap: 14px;
  margin: 22px 0 0;
}

.page-about .team__cell {
  border: 2px solid var(--line);
  background: var(--graphite);
  padding: 18px 18px 16px;
  box-shadow: 6px 6px 0 var(--edge);
}

.page-about .team__cell:nth-child(2) {
  background: var(--panel);
  border-color: var(--lime-dim);
}

.page-about .team__no {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--orange);
  margin-bottom: 8px;
}

.page-about .team__name {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.12rem;
  color: var(--paper);
  letter-spacing: -0.01em;
}

.page-about .team__desc {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.78;
  color: var(--steel);
}

/* ---------- 规模数字 ---------- */
.page-about .stats {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .stat {
  border: 2px solid var(--line);
  border-bottom: 4px solid var(--lime);
  background: var(--panel);
  padding: 14px 12px 12px;
}

.page-about .stat__k {
  display: block;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
}

.page-about .stat__l {
  display: block;
  margin-top: 6px;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--steel);
}

/* ---------- 合作与认可 ---------- */
.page-about .honor {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  border-top: 2px solid var(--line);
}

.page-about .honor > li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .honor__n {
  font-size: 0.85rem;
  color: var(--orange);
  letter-spacing: 0.1em;
}

.page-about .honor__t {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  color: var(--paper);
}

.page-about .honor__d {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.78;
  color: var(--steel);
}

.page-about .honor__d a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .honor__d a:hover {
  color: var(--lime);
}

/* ---------- 留下的理由 ---------- */
.page-about .reasons {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 2px solid var(--line);
}

.page-about .reasons__item {
  background: var(--panel);
  padding: 16px 16px 14px;
  border-left: 5px solid transparent;
  transition: border-color 0.16s var(--ease), background 0.16s var(--ease);
}

.page-about .reasons__item:hover {
  border-left-color: var(--lime);
  background: #102A41;
}

.page-about .reasons__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.02rem;
  color: var(--paper);
}

.page-about .reasons__desc {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.78;
  color: var(--steel);
}

/* ---------- 结尾行动区 ---------- */
.page-about .about-cta {
  margin-top: 40px;
  padding: 26px 22px;
  border: 2px solid var(--lime);
  background: linear-gradient(135deg, rgba(184, 255, 61, 0.12), rgba(13, 34, 53, 0.9) 55%);
  box-shadow: var(--shadow-hard);
  display: grid;
  gap: 20px;
}

.page-about .about-cta__k {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--lime);
}

.page-about .about-cta__t {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.3rem, 4.4vw, 1.8rem);
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: var(--paper);
}

.page-about .about-cta__d {
  margin: 0;
  max-width: 56ch;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--steel);
}

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

/* ---------- 显现动效 ---------- */
.page-about .js-reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.45s var(--ease), transform 0.45s var(--ease);
}

.page-about .js-reveal.is-in {
  opacity: 1;
  transform: none;
}

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

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

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

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

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    padding: 30px 28px;
  }
}

@media (min-width: 980px) {
  .page-about .about-mast {
    padding: 56px 0 10px;
  }

  .page-about .about-body {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: 46px;
    margin-top: 56px;
  }

  .page-about .about-toc {
    position: sticky;
    top: 88px;
    border-top: 2px solid var(--lime);
    padding-top: 12px;
    align-self: start;
  }

  .page-about .about-toc__list {
    display: block;
  }

  .page-about .about-toc__link {
    border: 0;
    border-left: 3px solid var(--line);
    padding: 9px 10px;
    white-space: normal;
    font-size: 13px;
  }

  .page-about .about-sec {
    padding-top: 36px;
  }

  .page-about .about-p {
    font-size: 1.02rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .js-reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-about .about-toc__link,
  .page-about .tl__summary,
  .page-about .reasons__item {
    transition: none;
  }
}