.page-about {
  background:
    radial-gradient(1100px 520px at 84% -6%, rgba(52, 239, 198, .10), transparent 62%),
    linear-gradient(180deg, var(--ink) 0%, var(--ink) 58%, var(--shade) 100%);
  color: var(--fog);
  padding-bottom: clamp(48px, 8vw, 96px);
  overflow-x: clip;
}

.page-about img {
  max-width: 100%;
  height: auto;
}

.page-about .container {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.page-about .breadcrumb {
  padding: clamp(16px, 3vw, 28px) 0 0;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  padding: clamp(20px, 4vw, 44px) 0 clamp(36px, 6vw, 72px);
  border-bottom: 1px solid var(--hair);
}

.page-about .about-hero__eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--moss);
  margin: 0 0 16px;
}

.page-about .about-hero__eyebrow .num {
  color: var(--cyan);
  letter-spacing: .1em;
}

.page-about .about-hero__slash {
  color: var(--hair-strong);
}

.page-about .about-hero__title {
  margin: 0 0 clamp(16px, 2.4vw, 24px);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.5rem, 8vw, 5rem);
  line-height: .96;
  letter-spacing: -.02em;
  color: var(--fog);
  text-wrap: balance;
}

.page-about .about-hero__lede {
  font-family: var(--font-serif);
  font-size: clamp(16px, 1.9vw, 18px);
  line-height: 1.85;
  color: rgba(233, 243, 238, .86);
  margin: 0 0 clamp(20px, 3vw, 28px);
  max-width: 46em;
}

.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  list-style: none;
  margin: 0;
  padding: 16px 0 0;
  border-top: 1px solid var(--hair);
}

.page-about .about-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.page-about .about-hero__facts .num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 26px;
  color: var(--amber);
  letter-spacing: -.02em;
}

.page-about .about-hero__factlabel {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--moss);
}

.page-about .about-hero__media {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--panel-deep);
  margin: 0;
}

.page-about .about-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(5, 15, 12, 0) 40%, rgba(5, 15, 12, .78) 100%);
  pointer-events: none;
}

.page-about .about-hero__media .media__img {
  display: block;
  width: 100%;
  height: clamp(260px, 46vw, 520px);
  object-fit: cover;
}

.page-about .about-hero__media .media__caption {
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 14px;
  z-index: 2;
  font-size: 12px;
  line-height: 1.6;
  color: var(--moss);
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.6fr) minmax(220px, .55fr);
    align-items: end;
  }

  .page-about .about-hero__media .media__img {
    height: clamp(340px, 42vw, 560px);
  }
}

/* ---------- 档案主体栅格 ---------- */
.page-about .about-shell {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
  padding-top: clamp(28px, 5vw, 56px);
}

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

.page-about .about-rail__label {
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--moss);
  margin: 0 0 10px;
}

.page-about .about-rail__label .num {
  color: var(--cyan);
  margin-right: 6px;
}

.page-about .about-rail__nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-rail__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: rgba(20, 24, 26, .72);
  color: var(--moss);
  font-size: 14px;
  text-decoration: none;
  white-space: nowrap;
  transition: color .24s var(--ease), border-color .24s var(--ease), transform .24s var(--ease);
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  color: var(--fog);
  border-color: var(--hair-strong);
}

.page-about .about-rail__idx {
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--moss);
}

.page-about .about-rail__link.is-current,
.page-about .about-rail__link[aria-current="true"] {
  color: var(--cyan);
  border-color: rgba(52, 239, 198, .55);
  background: rgba(52, 239, 198, .08);
  transform: translateX(4px);
}

.page-about .about-rail__link.is-current .about-rail__idx,
.page-about .about-rail__link[aria-current="true"] .about-rail__idx {
  color: var(--cyan);
}

@media (min-width: 1000px) {
  .page-about .about-shell {
    grid-template-columns: minmax(160px, 3fr) minmax(0, 9fr);
    gap: clamp(32px, 4vw, 64px);
    align-items: start;
  }

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

  .page-about .about-rail__nav {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-rail__link {
    justify-content: flex-start;
    border-color: transparent;
    background: transparent;
    border-left: 2px solid var(--hair);
    border-radius: 0;
    padding: 6px 0 6px 12px;
    min-height: 40px;
  }

  .page-about .about-rail__link.is-current,
  .page-about .about-rail__link[aria-current="true"] {
    border-left-color: var(--cyan);
    background: transparent;
  }
}

/* ---------- 章节 ---------- */
.page-about .about-body {
  min-width: 0;
}

.page-about .about-chapter {
  scroll-margin-top: 96px;
}

.page-about .about-chapter__head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: clamp(16px, 2.6vw, 24px);
}

.page-about .about-chapter__index {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--cyan);
  border: 1px solid rgba(52, 239, 198, .35);
  border-radius: 6px;
  padding: 4px 7px;
  line-height: 1;
  flex: 0 0 auto;
  margin-top: 6px;
}

.page-about .about-chapter__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.55rem, 4.2vw, 2.5rem);
  line-height: 1.08;
  letter-spacing: -.01em;
  color: var(--fog);
  margin: 0;
}

.page-about .about-chapter__lead {
  font-family: var(--font-sans);
  font-size: clamp(17px, 2vw, 19px);
  line-height: 1.7;
  color: var(--fog);
  border-left: 2px solid rgba(240, 179, 60, .65);
  padding-left: 14px;
  margin: 0 0 20px;
}

.page-about .about-chapter p {
  font-family: var(--font-serif);
  font-size: 17px;
  line-height: 1.85;
  color: rgba(233, 243, 238, .82);
  margin: 0 0 18px;
}

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

.page-about .about-chapter a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(52, 239, 198, .35);
}

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

/* ---------- 大数字锚点 ---------- */
.page-about .about-figure {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.4vw, 24px);
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: clamp(16px, 2.4vw, 24px) clamp(14px, 2.4vw, 24px);
  border-radius: var(--radius);
  background: linear-gradient(100deg, rgba(22, 48, 42, .9), rgba(20, 24, 26, .5));
  border: 1px solid var(--line);
}

.page-about .about-figure__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(2.6rem, 8vw, 4.4rem);
  line-height: .9;
  letter-spacing: -.04em;
  color: var(--amber);
  flex: 0 0 auto;
}

.page-about .about-figure__label {
  font-family: var(--font-sans);
  font-size: 13px;
  line-height: 1.7;
  color: var(--moss);
}

/* ---------- 年份刻度线 ---------- */
.page-about .about-rule {
  position: relative;
  height: 1px;
  margin: clamp(36px, 6vw, 72px) 0;
  background: linear-gradient(90deg, var(--hair-strong), rgba(140, 167, 155, .04));
}

.page-about .about-rule__year {
  position: absolute;
  left: 0;
  top: 0;
  transform: translateY(-50%);
  padding: 0 10px 0 0;
  background: var(--ink);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--moss);
}

/* ---------- 团队构成条形图 ---------- */
.page-about .about-composition {
  margin: clamp(20px, 3vw, 28px) 0 clamp(22px, 3vw, 30px);
}

.page-about .about-bar {
  display: flex;
  height: 58px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--line);
}

.page-about .about-bar__seg {
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(13px, 1.8vw, 18px);
  min-width: 0;
  transform-origin: left center;
}

.page-about .about-bar__seg--editors {
  flex: 14 1 0;
  background: linear-gradient(180deg, #34EFC6, #1fbd9c);
  color: #04221b;
}

.page-about .about-bar__seg--data {
  flex: 6 1 0;
  background: linear-gradient(180deg, #F0B33C, #c98d1e);
  color: #2a1a00;
}

.page-about .about-bar__seg--tech {
  flex: 9 1 0;
  background: var(--panel-deep);
  color: var(--fog);
  border-left: 1px solid var(--line);
}

.page-about [data-reveal].is-revealed .about-bar__seg {
  animation: about-grow .72s var(--ease) both;
}

@keyframes about-grow {
  from { transform: scaleX(.18); opacity: .35; }
  to { transform: scaleX(1); opacity: 1; }
}

.page-about .about-legend {
  list-style: none;
  display: grid;
  gap: 8px;
  margin: 14px 0 0;
  padding: 0;
  font-family: var(--font-sans);
  font-size: 13px;
  line-height: 1.6;
  color: var(--moss);
}

.page-about .about-legend li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.page-about .about-legend .dot {
  flex: 0 0 auto;
}

/* ---------- 引用块 ---------- */
.page-about .about-quote {
  margin: clamp(32px, 5vw, 56px) 0;
  padding: clamp(22px, 4vw, 36px);
  background: var(--paper);
  border-radius: var(--radius);
  border-left: 4px solid var(--amber);
  color: #12211c;
}

.page-about .about-quote__text {
  font-family: var(--font-serif);
  font-size: clamp(19px, 2.8vw, 26px);
  line-height: 1.6;
  font-weight: 600;
  margin: 0 0 10px;
  color: #0d1f19;
}

.page-about .about-quote__cite {
  font-family: var(--font-sans);
  font-style: normal;
  font-size: 13px;
  letter-spacing: .06em;
  color: #5d7069;
}

/* ---------- 内容链路 ---------- */
.page-about .about-pipeline {
  display: grid;
  gap: 12px;
  margin: clamp(20px, 3vw, 28px) 0 clamp(24px, 4vw, 36px);
}

.page-about .about-stage {
  display: grid;
  grid-template-columns: 74px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 16px clamp(14px, 2.2vw, 20px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(120deg, rgba(20, 24, 26, .95), rgba(20, 24, 26, .55));
}

.page-about .about-stage__time {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: -.02em;
  color: var(--rose);
  line-height: 1.2;
  padding-top: 2px;
}

.page-about .about-stage__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(17px, 2.2vw, 20px);
  letter-spacing: .01em;
  color: var(--fog);
  margin: 0 0 6px;
}

.page-about .about-stage__body p {
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.7;
  color: var(--moss);
  margin: 0;
}

.page-about .about-figureimg {
  margin: 0 0 clamp(22px, 3.4vw, 32px);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--panel);
}

.page-about .about-figureimg img {
  display: block;
  width: 100%;
  height: clamp(200px, 38vw, 420px);
  object-fit: cover;
}

.page-about .about-figureimg__cap {
  font-family: var(--font-sans);
  font-size: 12px;
  line-height: 1.6;
  color: var(--moss);
  padding: 10px 14px;
  border-top: 1px solid var(--hair);
}

/* ---------- 合作生态 ---------- */
.page-about .about-grid3 {
  display: grid;
  gap: 14px;
  margin: clamp(18px, 3vw, 26px) 0 clamp(20px, 3vw, 28px);
}

.page-about .about-line {
  padding: clamp(16px, 2.6vw, 22px);
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: rgba(22, 48, 42, .42);
}

.page-about .about-line__kicker {
  font-family: var(--font-sans);
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--moss);
  margin: 0 0 10px;
}

.page-about .about-line__kicker .num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 26px;
  color: var(--cyan);
  margin-right: 4px;
  letter-spacing: -.02em;
}

.page-about .about-line p:last-child {
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.75;
  color: rgba(233, 243, 238, .78);
  margin: 0;
}

@media (min-width: 780px) {
  .page-about .about-grid3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 城市与覆盖 ---------- */
.page-about .about-mapfig {
  margin: 0 0 clamp(20px, 3vw, 28px);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--panel-deep);
}

.page-about .about-mapfig img {
  display: block;
  width: 100%;
  height: clamp(200px, 34vw, 360px);
  object-fit: cover;
  opacity: .92;
}

.page-about .about-mapfig__cap {
  font-family: var(--font-sans);
  font-size: 12px;
  color: var(--moss);
  padding: 10px 14px;
  border-top: 1px solid var(--hair);
}

.page-about .about-stats {
  display: grid;
  gap: 1px;
  margin: clamp(20px, 3vw, 28px) 0;
  padding: 0;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-stats__item {
  background: rgba(20, 24, 26, .92);
  padding: clamp(14px, 2.2vw, 20px);
}

.page-about .about-stats dt {
  font-family: var(--font-sans);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--moss);
  margin-bottom: 8px;
}

.page-about .about-stats dd {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 15px;
  color: var(--fog);
}

.page-about .about-stats dd .num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(28px, 5vw, 38px);
  letter-spacing: -.03em;
  color: var(--amber);
  line-height: 1;
  margin-right: 4px;
}

@media (min-width: 720px) {
  .page-about .about-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 年表 ---------- */
.page-about .about-tl {
  list-style: none;
  margin: clamp(18px, 3vw, 26px) 0 clamp(24px, 4vw, 36px);
  padding: 0;
  border-left: 1px solid var(--hair-strong);
}

.page-about .about-tl__item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(64px, auto) minmax(0, 1fr);
  gap: 12px;
  padding: 0 0 22px 20px;
  outline: none;
}

.page-about .about-tl__item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 8px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--rose);
  box-shadow: 0 0 0 4px rgba(255, 77, 126, .16);
  transition: background .24s var(--ease), box-shadow .24s var(--ease);
}

.page-about .about-tl__item:hover::before,
.page-about .about-tl__item:focus-visible::before {
  background: var(--amber);
  box-shadow: 0 0 0 5px rgba(240, 179, 60, .2);
}

.page-about .about-tl__year {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(20px, 3vw, 26px);
  letter-spacing: -.02em;
  color: var(--cyan);
  line-height: 1.1;
}

.page-about .about-tl__summary {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--fog);
  margin: 0;
}

.page-about .about-tl__more {
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.75;
  color: var(--moss);
  margin: 6px 0 0;
}

@media (min-width: 860px) {
  .page-about .about-tl__more {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    margin-top: 0;
    transition: max-height .32s var(--ease), opacity .32s var(--ease), margin-top .32s var(--ease);
  }

  .page-about .about-tl__item:hover .about-tl__more,
  .page-about .about-tl__item:focus-visible .about-tl__more,
  .page-about .about-tl__item:focus-within .about-tl__more {
    max-height: 8em;
    opacity: 1;
    margin-top: 6px;
  }
}

/* ---------- 荣誉 ---------- */
.page-about .about-honors {
  display: grid;
  gap: 14px;
}

.page-about .about-honor {
  padding: clamp(16px, 2.6vw, 22px);
  border-radius: var(--radius);
  border: 1px solid var(--line);
  border-left: 3px solid var(--amber);
  background: rgba(20, 24, 26, .82);
}

.page-about .about-honor__year {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--amber);
  margin: 0 0 8px;
}

.page-about .about-honor__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(17px, 2.4vw, 21px);
  color: var(--fog);
  margin: 0 0 6px;
}

.page-about .about-honor__desc {
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.7;
  color: var(--moss);
  margin: 0;
}

@media (min-width: 720px) {
  .page-about .about-honors {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  margin-top: clamp(40px, 6vw, 72px);
  padding: clamp(24px, 4vw, 40px);
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background:
    radial-gradient(560px 240px at 88% 0%, rgba(52, 239, 198, .14), transparent 70%),
    linear-gradient(150deg, rgba(22, 48, 42, .95), rgba(20, 24, 26, .9));
}

.page-about .about-cta__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  letter-spacing: -.01em;
  color: var(--fog);
  margin: 0 0 12px;
}

.page-about .about-cta__text {
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.8;
  color: rgba(233, 243, 238, .8);
  margin: 0 0 clamp(18px, 3vw, 24px);
  max-width: 52em;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-cta__actions .btn {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal].is-revealed .about-bar__seg {
    animation: none;
  }

  .page-about .about-tl__more {
    transition: none;
  }
}