/* ============ 品牌文化页 · page-about ============ */

.page-about {
  padding-bottom: clamp(3rem, 8vw, 6rem);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  max-width: 48rem;
  padding-top: clamp(1.25rem, 4vw, 2.5rem);
}

.page-about .about-hero .eyebrow {
  color: var(--cyan);
}

.page-about .about-hero__title {
  margin: 0.5rem 0 0;
  font-family: var(--serif);
  font-weight: 800;
  font-size: clamp(2.1rem, 6.2vw, 3.6rem);
  line-height: 1.18;
  letter-spacing: -0.02em;
  color: var(--warm);
}

.page-about .about-hero__lede {
  margin: 1.25rem 0 0;
  max-width: 42rem;
  font-size: clamp(1rem, 2.2vw, 1.06rem);
  line-height: 1.85;
  color: var(--mist);
}

.page-about .hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(8.5rem, 1fr));
  gap: 1rem 1.5rem;
  margin: 2.25rem 0 0;
  padding: 1.25rem 0 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .hero-stat {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.page-about .hero-stat__num {
  font-size: clamp(1.4rem, 3.6vw, 1.75rem);
  font-weight: 700;
  color: var(--score);
  line-height: 1.1;
}

.page-about .hero-stat__label {
  font-size: 0.8rem;
  letter-spacing: 0.02em;
  color: var(--mist);
}

/* ---------- 粘性目录 ---------- */

.page-about .about-toc {
  position: sticky;
  top: var(--topbar-h);
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  margin: 2.5rem 0 0;
  padding: 0.7rem 0;
  overflow-x: auto;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background-color: var(--ink-800);
  scrollbar-width: none;
  -ms-overflow-style: none;
}

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

.page-about .about-toc__label {
  flex: 0 0 auto;
  margin-right: 0.5rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-about .about-toc .toc__link {
  flex: 0 0 auto;
  white-space: nowrap;
  font-size: 0.86rem;
}

/* ---------- 章节通用 ---------- */

.page-about .chapter {
  margin-top: clamp(3rem, 8vw, 5.5rem);
}

.page-about .chapter__no {
  display: block;
  margin: 0 0 0.6rem;
  font-size: 0.76rem;
  letter-spacing: 0.2em;
  color: var(--orange);
}

.page-about .chapter h2 {
  margin: 0 0 1rem;
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(1.5rem, 4.2vw, 2.3rem);
  line-height: 1.32;
  letter-spacing: -0.01em;
  color: var(--warm);
}

.page-about .chapter__intro {
  max-width: 40rem;
  margin: 0 0 2rem;
  font-size: 0.98rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .chapter__text .prose p {
  margin: 0 0 1rem;
}

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

.page-about .chapter__text a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 227, 208, 0.35);
}

.page-about .chapter__text a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- Bento 骨架（页面内重声明，保证窄屏单列） ---------- */

.page-about .bento {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.page-about .cell {
  min-width: 0;
}

/* ---------- 图片 ---------- */

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

.page-about .chapter__figure .media {
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

.page-about .chapter__figure img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-about .chapter__figure figcaption {
  margin-top: 0.75rem;
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--mist);
  border-left: 2px solid var(--line);
  padding-left: 0.75rem;
}

/* ---------- 编辑原则 ---------- */

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

.page-about .principle {
  position: relative;
  padding: 1.35rem 0 1.35rem 2.75rem;
  border-bottom: 1px solid var(--line);
  transition: background-color 0.22s var(--ease);
}

.page-about .principle:hover {
  background-color: rgba(16, 31, 56, 0.55);
}

.page-about .principle__no {
  position: absolute;
  left: 0;
  top: 1.45rem;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-about .principle__title {
  margin: 0 0 0.45rem;
  font-family: var(--sans);
  font-size: 1.06rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--warm);
}

.page-about .principle p {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 版本时间轴 ---------- */

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

.page-about .version {
  position: relative;
  padding: 0 0 2rem 1.9rem;
  border-left: 1px solid var(--line);
}

.page-about .version:last-child {
  padding-bottom: 0.5rem;
  border-left-color: transparent;
}

.page-about .version::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 0.35rem;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background-color: var(--ink-800);
  border: 1px solid var(--cyan);
  transition: background-color 0.22s var(--ease), border-color 0.22s var(--ease);
}

.page-about .version:hover::before {
  background-color: var(--orange);
  border-color: var(--orange);
}

.page-about .version__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.7rem;
  margin-bottom: 0.4rem;
}

.page-about .version__tag {
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-about .version__title {
  margin: 0;
  font-family: var(--sans);
  font-size: 1.08rem;
  font-weight: 700;
  letter-spacing: -0.012em;
  color: var(--warm);
}

.page-about .version__body {
  margin: 0;
  max-width: 38rem;
  font-size: 0.93rem;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 协作关系图 ---------- */

.page-about .org-map-wrap {
  margin: 0 0 2rem;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(120% 90% at 50% 45%, rgba(122, 107, 255, 0.1), transparent 62%),
    var(--panel);
  scrollbar-width: thin;
}

.page-about .org-map {
  display: block;
  width: 100%;
  min-width: 520px;
  height: auto;
}

.page-about .org-lines line {
  stroke: var(--line);
  stroke-width: 1;
}

.page-about .org-core circle {
  fill: rgba(255, 106, 43, 0.09);
  stroke: var(--orange);
  stroke-width: 1;
}

.page-about .org-core__t1,
.page-about .org-core__t2 {
  text-anchor: middle;
  fill: var(--warm);
  font-family: var(--sans);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.page-about .org-core__t2 {
  font-size: 14px;
  font-weight: 500;
  fill: var(--mist);
  letter-spacing: 0.04em;
}

.page-about .org-node > circle {
  fill: var(--ink-800);
  stroke: var(--line);
  stroke-width: 1;
  transition: stroke 0.22s var(--ease), filter 0.22s var(--ease);
}

.page-about .org-node:hover > circle,
.page-about .org-node:focus-visible > circle,
.page-about .org-node:focus-within > circle {
  stroke: var(--cyan);
  filter: drop-shadow(0 0 12px rgba(47, 227, 208, 0.35));
}

.page-about .org-node__label {
  text-anchor: middle;
  fill: var(--warm);
  font-family: var(--sans);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.page-about .org-node__num {
  text-anchor: middle;
  fill: var(--score);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
}

.page-about .org-node__note {
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.22s var(--ease);
}

.page-about .org-node:hover .org-node__note,
.page-about .org-node:focus-visible .org-node__note,
.page-about .org-node:focus-within .org-node__note {
  opacity: 1;
}

.page-about .org-node__note rect {
  fill: var(--ink-900);
  stroke: var(--cyan);
  stroke-opacity: 0.45;
  stroke-width: 1;
}

.page-about .org-node__note text {
  fill: var(--mist);
  font-family: var(--sans);
  font-size: 12.5px;
}

/* ---------- 团队数据 ---------- */

.page-about .team-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-bottom: 1.75rem;
  background-color: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .team-stats .stat {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 1.15rem 1rem;
  background-color: var(--panel);
}

.page-about .team-stats .stat__value {
  font-size: clamp(1.25rem, 3.4vw, 1.55rem);
  font-weight: 700;
  color: var(--cyan);
  line-height: 1.15;
}

.page-about .team-stats .stat__label {
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--mist);
}

.page-about .team-note {
  max-width: 46rem;
}

.page-about .team-note p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 收尾 ---------- */

.page-about .next-stop {
  margin-top: clamp(3rem, 8vw, 5.5rem);
}

.page-about .next-stop__inner {
  padding: clamp(1.5rem, 4.5vw, 2.75rem);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(150deg, rgba(47, 227, 208, 0.09), transparent 52%),
    linear-gradient(320deg, rgba(255, 106, 43, 0.12), transparent 55%),
    var(--ink-900);
}

.page-about .next-stop__lede {
  max-width: 42rem;
  margin: 0 0 1.5rem;
  font-size: 0.98rem;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .next-stop__lede a {
  color: var(--warm);
  text-decoration: none;
  border-bottom: 1px solid rgba(244, 240, 232, 0.35);
}

.page-about .next-stop__lede a:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-about .next-stop__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.9rem;
}

/* ---------- 返回顶部 ---------- */

.page-about .to-top {
  margin-top: 3rem;
}

/* ============ 断点 ============ */

@media (min-width: 640px) {
  .page-about .team-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .bento {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 2rem 2.25rem;
    align-items: start;
  }

  .page-about .cell--4 { grid-column: span 4; }
  .page-about .cell--5 { grid-column: span 5; }
  .page-about .cell--7 { grid-column: span 7; }
  .page-about .cell--8 { grid-column: span 8; }
  .page-about .cell--12 { grid-column: span 12; }

  .page-about .chapter__figure--tall {
    margin-top: 1.25rem;
  }

  .page-about .version {
    display: grid;
    grid-template-columns: 16rem minmax(0, 1fr);
    gap: 1.5rem 2.5rem;
    padding: 0 0 2.25rem 0;
    border-left: none;
  }

  .page-about .version::before {
    left: -5.5rem;
    top: 0.4rem;
  }

  .page-about .version__head {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.35rem;
    margin-bottom: 0;
    text-align: left;
  }

  .page-about .version__body {
    max-width: none;
    padding-left: 2.75rem;
    border-left: 1px solid var(--line);
  }

  .page-about .version-rail {
    padding-left: 5rem;
    position: relative;
  }

  .page-about .version-rail::before {
    content: "";
    position: absolute;
    left: 5px;
    top: 0.35rem;
    bottom: 2.25rem;
    width: 1px;
    background: linear-gradient(to bottom, var(--cyan), rgba(255, 106, 43, 0.65));
    opacity: 0.6;
  }
}

@media (min-width: 1024px) {
  .page-about .about-toc {
    top: 0;
  }

  .page-about .org-map {
    min-width: 0;
  }
}

@media (max-width: 520px) {
  .page-about .org-map {
    min-width: 460px;
  }

  .page-about .org-node__note {
    display: none;
  }

  .page-about .principle {
    padding-left: 2.25rem;
  }

  .page-about .next-stop__actions {
    flex-direction: column;
    align-items: stretch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .principle,
  .page-about .version::before,
  .page-about .org-node > circle,
  .page-about .org-node__note {
    transition: none;
  }
}