/* ===== 页面作用域：品牌介绍 /about/ ===== */
.page-about {
  --about-fg: var(--cream);
  position: relative;
  background: var(--ink);
  color: var(--cream);
  font-family: var(--font-sans);
  padding-bottom: var(--sp-7);
}

.page-about h1,
.page-about h2,
.page-about h3 {
  letter-spacing: -.02em;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  padding-top: var(--sp-5);
}

.page-about .about-crumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .375rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: var(--fs-sm);
}

.page-about .about-crumb li {
  display: flex;
  align-items: center;
  gap: .375rem;
}

.page-about .about-crumb li + li::before {
  content: "›";
  color: var(--ink-3);
  font-size: var(--fs-base);
  line-height: 1;
}

.page-about .about-crumb a {
  color: var(--fog);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-crumb a:hover,
.page-about .about-crumb a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--line-cyan);
}

.page-about .about-crumb [aria-current="page"] {
  color: var(--cream);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: var(--sp-4) 0 var(--sp-6);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -6rem;
  right: 0;
  width: min(70vw, 720px);
  aspect-ratio: 1 / 1;
  background: radial-gradient(circle at 68% 32%, rgba(34, 228, 182, .15), transparent 64%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-6);
  padding-top: var(--sp-4);
}

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

.page-about .about-hero h1 {
  margin: 0 0 var(--sp-4);
  font-size: clamp(1.9rem, 5.4vw, 3.25rem);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -.028em;
  color: var(--cream);
}

.page-about .about-hero .lede {
  margin: 0 0 var(--sp-5);
  max-width: 42ch;
  font-size: var(--fs-md);
  line-height: 1.78;
  color: rgba(244, 241, 233, .82);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
}

.page-about .about-hero__figure {
  margin: 0;
  min-width: 0;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius-l);
  border: 1px solid var(--line-dark);
}

.page-about .about-hero__figure figcaption {
  margin-top: var(--sp-3);
  font-size: var(--fs-sm);
  line-height: 1.65;
  color: var(--fog);
}

.page-about .about-hero__stats {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--sp-4);
  margin: var(--sp-6) 0 0;
  padding: var(--sp-5) 0 0;
  list-style: none;
  border-top: 1px solid var(--line-dark);
}

.page-about .about-hero__stats li {
  display: flex;
  flex-direction: column;
  gap: .25rem;
  min-width: 0;
}

.page-about .about-hero__stats .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--fs-xl);
  font-weight: 700;
  line-height: 1;
}

.page-about .about-hero__stats li > span:last-child {
  font-size: var(--fs-sm);
  color: var(--fog);
}

/* ---------- 主体骨架 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  padding-top: var(--sp-5);
}

.page-about .about-flow {
  display: grid;
  gap: var(--sp-5);
  min-width: 0;
}

/* ---------- 左侧章节索引 ---------- */
.page-about .about-rail {
  position: sticky;
  top: var(--header-h);
  z-index: 6;
  padding: .625rem 0 .5rem;
  margin-bottom: var(--sp-4);
  background: linear-gradient(180deg, var(--ink) 0%, var(--ink) 76%, rgba(11, 27, 51, 0) 100%);
}

.page-about .about-rail .section-rail__title {
  margin: 0 0 .5rem;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: .14em;
  color: var(--fog);
  text-transform: uppercase;
}

.page-about .about-rail ul {
  display: flex;
  gap: .375rem;
  margin: 0;
  padding: 0 0 .25rem;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-about .about-rail a {
  display: block;
  padding: .4rem .8rem;
  border-radius: 999px;
  font-size: var(--fs-sm);
  color: var(--fog);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}

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

.page-about .about-rail a.is-active {
  color: var(--cyan);
  background: rgba(34, 228, 182, .1);
}

/* ---------- 章节容器 ---------- */
.page-about .about-sec {
  position: relative;
  padding: clamp(1.25rem, 3.5vw, 2.5rem);
  border-radius: var(--radius-l);
  color: var(--cream);
  scroll-margin-top: calc(var(--header-h) + 4.5rem);
  min-width: 0;
}

.page-about .about-sec--light {
  background: var(--cream);
  color: var(--ink);
}

.page-about .about-sec__kicker {
  margin: 0 0 .625rem;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: .12em;
  color: var(--cyan);
}

.page-about .about-sec--light .about-sec__kicker {
  color: var(--clay);
}

.page-about .about-sec__title {
  margin: 0 0 var(--sp-4);
  font-size: clamp(1.5rem, 3.6vw, 2.25rem);
  font-weight: 800;
  line-height: 1.22;
  color: inherit;
}

.page-about .about-sec__lede {
  margin: 0 0 var(--sp-5);
  max-width: 48ch;
  font-size: var(--fs-md);
  line-height: 1.78;
  color: rgba(244, 241, 233, .78);
}

.page-about .about-sec--light .about-sec__lede {
  color: var(--ink-3);
}

.page-about .about-prose p {
  margin: 0 0 var(--sp-4);
  max-width: 44ch;
  font-size: var(--fs-base);
  line-height: 1.82;
  color: rgba(244, 241, 233, .8);
}

/* ---------- 起点区块 ---------- */
.page-about .about-origin__facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--sp-4);
  margin-top: var(--sp-5);
  padding-top: var(--sp-5);
  border-top: 1px solid var(--line-dark);
}

.page-about .about-origin__facts > div {
  display: flex;
  flex-direction: column;
  gap: .3rem;
  min-width: 0;
}

.page-about .about-origin__facts .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--fs-xl);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-origin__facts > div > span:last-child {
  font-size: var(--fs-sm);
  line-height: 1.6;
  color: var(--fog);
}

/* ---------- 版本时间线 ---------- */
.page-about .ver-line {
  position: relative;
  margin: 0;
  padding: 0 0 0 1.75rem;
  list-style: none;
}

.page-about .ver-line::before {
  content: "";
  position: absolute;
  left: 5px;
  top: .45rem;
  bottom: .6rem;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--moss) 42%, var(--clay) 74%, var(--orange) 100%);
}

.page-about .ver-node {
  position: relative;
  padding-bottom: var(--sp-6);
  min-width: 0;
}

.page-about .ver-node:last-child {
  padding-bottom: 0;
}

.page-about .ver-node::before {
  content: "";
  position: absolute;
  left: calc(-1.75rem + 0px);
  top: .35rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--cyan);
  box-sizing: border-box;
}

.page-about .ver-node__tag {
  display: inline-block;
  margin-bottom: .35rem;
  padding: .125rem .5rem;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--fs-sm);
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--ink);
  background: var(--cyan);
}

.page-about .ver-node__when {
  margin: 0 0 .25rem;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--fs-xs);
  letter-spacing: .06em;
  color: var(--fog);
}

.page-about .ver-node__body h3 {
  margin: 0 0 .4rem;
  font-size: var(--fs-md);
  font-weight: 700;
  line-height: 1.45;
  color: var(--cream);
}

.page-about .ver-node__body p {
  margin: 0;
  max-width: 46ch;
  font-size: var(--fs-sm);
  line-height: 1.78;
  color: rgba(244, 241, 233, .72);
}

/* ---------- 团队分组 ---------- */
.page-about .team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(175px, 1fr));
  gap: var(--sp-4);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .team-card {
  position: relative;
  padding: 1.25rem 1.125rem;
  border-radius: var(--radius-m);
  background: rgba(11, 27, 51, .05);
  border: 1px solid var(--line-light);
  border-top: 3px solid var(--band, var(--moss));
  min-width: 0;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .team-card:nth-child(1) { --band: var(--moss); }
.page-about .team-card:nth-child(2) { --band: var(--clay); }
.page-about .team-card:nth-child(3) { --band: var(--orange); }
.page-about .team-card:nth-child(4) { --band: var(--ink-3); }

.page-about .team-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 30px rgba(11, 27, 51, .14);
}

.page-about .team-card__num {
  display: block;
  margin-bottom: .375rem;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--fs-2xl);
  font-weight: 700;
  line-height: 1;
  color: var(--ink);
}

.page-about .team-card h3 {
  margin: 0 0 .5rem;
  font-size: var(--fs-base);
  font-weight: 700;
  color: var(--ink);
}

.page-about .team-card p {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.72;
  color: var(--ink-3);
}

/* ---------- 数据入库 ---------- */
.page-about .gov-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-6);
}

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

.page-about .gov-steps {
  display: grid;
  gap: var(--sp-4);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .gov-steps li {
  display: grid;
  grid-template-columns: 2.25rem minmax(0, 1fr);
  gap: .875rem;
  align-items: start;
}

.page-about .gov-steps__n {
  padding-top: .15rem;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--fs-base);
  font-weight: 700;
  color: var(--orange);
}

.page-about .gov-steps h3 {
  margin: 0 0 .3rem;
  font-size: var(--fs-md);
  font-weight: 700;
  color: var(--cream);
}

.page-about .gov-steps p {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.76;
  color: rgba(244, 241, 233, .72);
}

.page-about .gov-figure {
  margin: 0;
  min-width: 0;
}

.page-about .gov-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--radius-m);
  border: 1px solid var(--line-dark);
}

.page-about .gov-notes {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--sp-4);
  margin-top: var(--sp-6);
  padding-top: var(--sp-5);
  border-top: 1px solid var(--line-dark);
}

.page-about .gov-note {
  min-width: 0;
}

.page-about .gov-note h3 {
  margin: 0 0 .4rem;
  font-size: var(--fs-base);
  font-weight: 700;
  color: var(--cyan);
}

.page-about .gov-note p {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.76;
  color: rgba(244, 241, 233, .72);
}

/* ---------- 合作与荣誉 ---------- */
.page-about .honor-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: var(--sp-4);
  margin-bottom: var(--sp-6);
}

.page-about .honor-card {
  padding: 1.25rem;
  border-radius: var(--radius-m);
  background: rgba(11, 27, 51, .045);
  border: 1px solid var(--line-light);
  min-width: 0;
}

.page-about .honor-card__num {
  display: block;
  margin-bottom: .5rem;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--fs-xl);
  font-weight: 700;
  line-height: 1.1;
  color: var(--clay);
}

.page-about .honor-card h3 {
  margin: 0 0 .4rem;
  font-size: var(--fs-base);
  font-weight: 700;
  color: var(--ink);
}

.page-about .honor-card p {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.72;
  color: var(--ink-3);
}

.page-about .honor-list {
  display: grid;
  gap: .75rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .honor-list li {
  position: relative;
  padding-left: 1.5rem;
  font-size: var(--fs-base);
  line-height: 1.72;
  color: var(--ink-3);
}

.page-about .honor-list li::before {
  content: "";
  position: absolute;
  left: .125rem;
  top: .62em;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--orange);
  transform: rotate(45deg);
}

/* ---------- 覆盖与规范 ---------- */
.page-about .cov-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-6);
}

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

.page-about .cov-list {
  display: grid;
  gap: .625rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .cov-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: .25rem 1rem;
  padding-bottom: .625rem;
  border-bottom: 1px solid var(--line-dark);
  font-size: var(--fs-sm);
}

.page-about .cov-list span {
  color: var(--fog);
}

.page-about .cov-list strong {
  font-weight: 700;
  color: var(--cream);
}

.page-about .cov-figure {
  margin: 0;
  min-width: 0;
}

.page-about .cov-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 6 / 5;
  object-fit: cover;
  border-radius: var(--radius-m);
  border: 1px solid var(--line-dark);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  padding: clamp(1.5rem, 4vw, 2.75rem);
  border-radius: var(--radius-l);
  border: 1px solid var(--line-cyan);
  background:
    linear-gradient(135deg, rgba(34, 228, 182, .12) 0%, rgba(255, 122, 47, .09) 52%, rgba(20, 41, 74, .72) 100%);
}

.page-about .about-cta h2 {
  margin: 0 0 .75rem;
  font-size: clamp(1.4rem, 3.2vw, 2rem);
  font-weight: 800;
  line-height: 1.25;
  color: var(--cream);
}

.page-about .about-cta p {
  margin: 0 0 var(--sp-5);
  max-width: 46ch;
  font-size: var(--fs-base);
  line-height: 1.78;
  color: rgba(244, 241, 233, .76);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
}

/* ---------- 滚动揭示（渐进增强） ---------- */
.page-about [data-reveal] {
  opacity: 1;
}

.has-js .page-about [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 400ms var(--ease), transform 400ms var(--ease);
}

.has-js .page-about [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 断点 ---------- */
@media (min-width: 700px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
    gap: var(--sp-7);
    align-items: end;
  }

  .page-about .ver-line {
    padding-left: 2rem;
  }

  .page-about .ver-node::before {
    left: -2rem;
  }

  .page-about .gov-grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
    gap: var(--sp-7);
    align-items: start;
  }

  .page-about .cov-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, .88fr);
    gap: var(--sp-7);
    align-items: center;
  }
}

@media (min-width: 1024px) {
  .page-about .about-body {
    grid-template-columns: 196px minmax(0, 1fr);
    gap: var(--sp-7);
    align-items: start;
  }

  .page-about .about-rail {
    top: calc(var(--header-h) + 1.75rem);
    z-index: 2;
    padding: 0;
    margin-bottom: 0;
    background: none;
  }

  .page-about .about-rail ul {
    flex-direction: column;
    gap: .125rem;
    padding-bottom: 0;
    overflow: visible;
    border-left: 1px solid var(--line-dark);
  }

  .page-about .about-rail a {
    padding: .5rem .875rem .5rem 1rem;
    margin-left: -1px;
    border-radius: 0 999px 999px 0;
    border-left: 2px solid transparent;
    white-space: normal;
  }

  .page-about .about-rail a.is-active {
    border-left-color: var(--cyan);
  }
}

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

  .page-about .team-card {
    transition: none;
  }
}