.page-about {
  background: var(--ink);
  color: var(--data);
}

/* 面包屑 */
.page-about .breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-top: 16px;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--stone);
}
.page-about .breadcrumbs__link {
  color: var(--stone);
  text-decoration: none;
  transition: color 0.18s var(--ease);
}
.page-about .breadcrumbs__link:hover {
  color: var(--yellow);
}
.page-about .breadcrumbs__sep {
  color: var(--slate);
}
.page-about .breadcrumbs__now {
  color: var(--data);
}

/* 首屏 */
.page-about .about-hero {
  padding: clamp(20px, 3.4vw, 36px) 0 clamp(26px, 4vw, 46px);
  border-bottom: 1px solid var(--line);
  background: radial-gradient(120% 150% at 8% 0%, rgba(23, 54, 42, 0.95) 0%, rgba(11, 31, 23, 0) 64%);
}
.page-about .about-hero__inner {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
}
.page-about .about-hero__lead h1 {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(1.85rem, 4.6vw, 3.25rem);
  line-height: 1.16;
  letter-spacing: 0.01em;
  color: var(--paper);
  margin: 0.3em 0 0.55em;
}
.page-about .about-hero__intro {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(0.96rem, 1.3vw, 1.1rem);
  line-height: 1.84;
  color: rgba(232, 241, 236, 0.86);
}
.page-about .about-stamp {
  position: relative;
  background: var(--paper);
  color: var(--ink-deep);
  border: 1px solid rgba(6, 18, 13, 0.22);
  border-radius: var(--radius);
  padding: 16px 18px 16px 22px;
  box-shadow: var(--shadow-card);
}
.page-about .about-stamp::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--yellow);
  border-radius: var(--radius) 0 0 var(--radius);
}
.page-about .about-stamp__year {
  display: block;
  font-family: var(--font-num);
  font-size: 2.15rem;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--ink-deep);
}
.page-about .about-stamp__text {
  margin: 0.55em 0 0;
  font-size: 0.8rem;
  line-height: 1.62;
  color: rgba(6, 18, 13, 0.72);
}

/* 双栏主体 */
.page-about .about-body {
  padding-top: clamp(30px, 4.6vw, 58px);
  padding-bottom: clamp(40px, 6vw, 88px);
  display: grid;
  gap: clamp(26px, 3.6vw, 44px);
}
.page-about .about-body__main {
  min-width: 0;
}
.page-about .about-body__aside {
  min-width: 0;
  order: -1;
}

/* 章节 */
.page-about .about-chapter {
  margin-bottom: clamp(34px, 5vw, 58px);
}
.page-about .about-chapter:last-child {
  margin-bottom: 0;
}
.page-about .about-chapter__head {
  display: flex;
  gap: 14px;
  align-items: baseline;
  padding-top: 16px;
  margin-bottom: 14px;
  border-top: 1px solid var(--line);
}
.page-about .about-chapter__num {
  flex: 0 0 auto;
  font-family: var(--font-num);
  font-size: clamp(1.85rem, 4.2vw, 2.8rem);
  line-height: 0.9;
  color: transparent;
  -webkit-text-stroke: 1px rgba(232, 178, 58, 0.62);
}
.page-about .about-chapter__title {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(1.24rem, 2.5vw, 1.7rem);
  line-height: 1.32;
  color: var(--paper);
  margin: 0.18em 0 0;
}
.page-about .about-chapter p:not(.eyebrow) {
  margin: 0 0 0.95em;
  font-size: 0.98rem;
  line-height: 1.86;
  color: rgba(232, 241, 236, 0.82);
}

/* 图片 */
.page-about .about-figure {
  margin: 0 0 18px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-deep);
  box-shadow: var(--shadow-card);
}
.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .about-figure figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  background: rgba(6, 18, 13, 0.55);
  font-size: 0.76rem;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--stone);
}

/* 引用 */
.page-about .about-quote {
  margin: 22px 0 0;
  padding: 18px 20px;
  background: var(--moss);
  border-left: 3px solid var(--yellow);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.page-about .about-quote p {
  margin: 0 0 0.6em;
  font-family: var(--font-serif);
  font-size: clamp(1rem, 1.9vw, 1.22rem);
  line-height: 1.72;
  color: var(--paper);
}
.page-about .about-quote cite {
  font-style: normal;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--yellow);
}

/* 筛选条 */
.page-about .about-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 6px 0 16px;
}
.page-about .chip-filter__btn {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  padding: 7px 14px;
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  color: var(--data);
  cursor: pointer;
  transition: background 0.18s var(--ease), color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.page-about .chip-filter__btn:hover {
  border-color: var(--yellow);
  color: var(--yellow);
}
.page-about .chip-filter__btn[aria-pressed="true"] {
  background: var(--yellow);
  border-color: var(--yellow);
  color: var(--ink-deep);
  font-weight: 700;
}

/* 四类能力卡 */
.page-about .about-caps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-about .about-cap {
  padding: 16px 16px 18px;
  background: var(--moss);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  transition: transform 0.22s var(--ease), box-shadow 0.22s var(--ease), border-color 0.22s var(--ease);
}
.page-about .about-cap:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lift);
  border-color: var(--line-strong);
}
.page-about .about-cap[hidden] {
  display: none;
}
.page-about .about-cap .tag {
  font-size: 0.7rem;
  letter-spacing: 0.1em;
}
.page-about .about-cap__title {
  margin: 0.7em 0 0.4em;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 1rem;
  line-height: 1.4;
  color: var(--data);
}
.page-about .about-cap__desc {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.78;
  color: rgba(232, 241, 236, 0.76);
}

/* 规模数据 */
.page-about .about-scale {
  display: grid;
  gap: 1px;
  margin: 16px 0 18px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.page-about .about-scale__cell {
  background: var(--ink-deep);
  padding: 16px 16px 14px;
}
.page-about .about-scale__num {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(1.85rem, 4.2vw, 2.45rem);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--data);
}
.page-about .about-scale__u {
  font-size: 0.6em;
  margin-left: 2px;
  color: var(--yellow);
}
.page-about .about-scale__label {
  display: block;
  margin-top: 7px;
  font-size: 0.78rem;
  line-height: 1.5;
  color: var(--stone);
}

/* 合作列表 */
.page-about .about-partners {
  list-style: none;
  margin: 14px 0 18px;
  padding: 0;
  display: grid;
  gap: 10px;
}
.page-about .about-partners li {
  position: relative;
  padding-left: 16px;
  font-size: 0.88rem;
  line-height: 1.72;
  color: rgba(232, 241, 236, 0.8);
}
.page-about .about-partners li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.66em;
  width: 6px;
  height: 6px;
  background: var(--clay);
  border-radius: 1px;
}

/* 荣誉标签 */
.page-about .about-honors {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 18px;
}
.page-about .about-honors__item {
  display: inline-block;
  padding: 7px 12px;
  background: rgba(23, 54, 42, 0.62);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  font-size: 0.76rem;
  letter-spacing: 0.05em;
  color: var(--data);
}

/* 继续了解 */
.page-about .about-links {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.page-about .about-link {
  display: block;
  padding: 14px 16px;
  background: rgba(23, 54, 42, 0.55);
  border: 1px solid var(--line);
  border-left: 3px solid var(--yellow);
  border-radius: 0 var(--radius) var(--radius) 0;
  text-decoration: none;
  transition: background 0.2s var(--ease), transform 0.2s var(--ease);
}
.page-about .about-link:hover {
  background: var(--moss);
  transform: translateX(2px);
}
.page-about .about-link__k {
  display: block;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.94rem;
  color: var(--paper);
}
.page-about .about-link__d {
  display: block;
  margin-top: 3px;
  font-size: 0.8rem;
  line-height: 1.66;
  color: rgba(232, 241, 236, 0.72);
}

/* 侧栏 */
.page-about .about-aside__block {
  padding: 16px 16px 20px;
  margin-bottom: 16px;
  background: rgba(23, 54, 42, 0.55);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.page-about .about-aside__block:last-child {
  margin-bottom: 0;
}
.page-about .about-aside__label {
  margin: 0 0 14px;
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--yellow);
}

/* 年表 */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}
.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: var(--line-strong);
}
.page-about .about-timeline__node {
  position: relative;
  padding-left: 24px;
  margin-bottom: 16px;
}
.page-about .about-timeline__node:last-child {
  margin-bottom: 0;
}
.page-about .about-timeline__node::before {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  width: 9px;
  height: 9px;
  background: var(--clay);
  border-radius: 1px;
  transition: background 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.page-about .about-timeline__node:hover::before,
.page-about .about-timeline__node:focus-within::before {
  background: var(--yellow);
  box-shadow: 0 0 0 3px rgba(232, 178, 58, 0.16);
}
.page-about .about-timeline__mark {
  display: inline-block;
  font-family: var(--font-num);
  font-size: 1.02rem;
  letter-spacing: 0.08em;
  color: var(--yellow);
  line-height: 1.2;
}
.page-about .about-timeline__title {
  margin: 2px 0 0;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.9rem;
  line-height: 1.45;
  color: var(--data);
}
.page-about .about-timeline__more {
  margin: 4px 0 0;
  max-height: 0;
  overflow: hidden;
  font-size: 0.78rem;
  line-height: 1.66;
  color: rgba(232, 241, 236, 0.7);
  transition: max-height 0.32s var(--ease), opacity 0.32s var(--ease);
  opacity: 0;
}
.page-about .about-timeline__node:hover .about-timeline__more,
.page-about .about-timeline__node:focus-within .about-timeline__more {
  max-height: 9em;
  opacity: 1;
}

/* 数据徽章 */
.page-about .about-badges {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}
.page-about .about-badge {
  position: relative;
  padding: 12px 12px 11px;
  background: var(--paper);
  color: var(--ink-deep);
  border: 1px solid rgba(6, 18, 13, 0.2);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.page-about .about-badge:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lift);
}
.page-about .about-badge::after {
  content: "";
  position: absolute;
  right: 8px;
  top: 8px;
  width: 5px;
  height: 5px;
  background: var(--red);
  border-radius: 1px;
}
.page-about .about-badge__num {
  display: block;
  font-family: var(--font-num);
  font-size: 1.65rem;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--ink-deep);
}
.page-about .about-badge__u {
  font-size: 0.6em;
  color: var(--clay);
}
.page-about .about-badge__label {
  display: block;
  margin-top: 6px;
  font-size: 0.72rem;
  line-height: 1.45;
  color: rgba(6, 18, 13, 0.72);
}

/* 响应式 */
@media (min-width: 600px) {
  .page-about .about-caps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-partners {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-scale {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 940px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1fr) 262px;
    align-items: end;
  }
  .page-about .about-stamp {
    margin-bottom: 6px;
  }
}

@media (min-width: 1000px) {
  .page-about .about-body {
    grid-template-columns: minmax(0, 1.58fr) minmax(276px, 0.84fr);
    align-items: start;
  }
  .page-about .about-body__aside {
    order: 0;
    position: sticky;
    top: 20px;
  }
  .page-about .about-chapter__head {
    padding-top: 20px;
  }
  .page-about .about-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (hover: none) {
  .page-about .about-timeline__more {
    max-height: none;
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-cap,
  .page-about .about-badge,
  .page-about .about-link,
  .page-about .about-timeline__more {
    transition: none;
  }
  .page-about .about-cap:hover,
  .page-about .about-badge:hover,
  .page-about .about-link:hover {
    transform: none;
  }
}