.page-about {
  --about-ink: #101B14;
  --about-line: rgba(13, 42, 29, 0.14);
  background: var(--parchment);
  color: var(--about-ink);
  font-family: var(--font-body);
  overflow-x: hidden;
}
.page-about img {
  max-width: 100%;
  height: auto;
}

/* ===== 首屏 ===== */
.page-about .about-hero {
  position: relative;
  background: var(--deep);
  color: var(--parchment);
  padding: calc(var(--header-h) + 2.5rem) 0 2.5rem;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 3rem), 0 100%);
}
.page-about .about-hero .container {
  position: relative;
  z-index: 1;
}
.page-about .about-hero .breadcrumb {
  color: var(--mist);
  margin-bottom: 1.5rem;
}
.page-about .about-hero .breadcrumb a {
  color: var(--parchment);
  text-decoration: none;
  transition: color var(--transition);
}
.page-about .about-hero .breadcrumb a:hover {
  color: var(--lime);
}
.page-about .about-hero .breadcrumb-sep {
  color: var(--mist);
}
.page-about .about-hero-kicker {
  display: inline-block;
  background: var(--lime);
  color: var(--deep);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  padding: 0.35rem 0.75rem;
  margin-bottom: 1.25rem;
}
.page-about .about-hero-title {
  font-family: var(--font-body);
  font-weight: 300;
  font-size: var(--text-hero);
  line-height: 1.12;
  letter-spacing: -0.01em;
  margin: 0 0 1.5rem;
  max-width: 12ch;
}
.page-about .about-hero-title .about-hero-brand {
  display: block;
  font-family: var(--font-heading);
  font-size: 0.4em;
  font-weight: 500;
  letter-spacing: 0.16em;
  color: var(--green);
  margin-bottom: 0.75rem;
}
.page-about .about-hero-title .about-hero-slogan {
  position: relative;
}
.page-about .about-hero-title .about-hero-slogan::after {
  content: "";
  display: block;
  width: 3.5ch;
  height: 6px;
  background: var(--green);
  transform: skewX(-25deg);
  margin-top: 0.5rem;
}
.page-about .about-hero-desc {
  font-size: var(--text-base);
  line-height: 1.8;
  color: rgba(242, 232, 213, 0.78);
  max-width: 36em;
  margin: 0 0 2rem;
}
.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.page-about .about-hero .btn-outline {
  border-color: rgba(242, 232, 213, 0.55);
  color: var(--parchment);
}
.page-about .about-hero .btn-outline:hover {
  border-color: var(--lime);
  color: var(--lime);
}

/* ===== 年份刻度线 ===== */
.page-about .about-rail {
  display: flex;
  gap: 0.75rem;
  margin-top: 3.25rem;
  padding: 0.25rem 0 0.75rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.page-about .about-rail::-webkit-scrollbar {
  display: none;
}
.page-about .about-rail span {
  flex: 0 0 auto;
  min-width: 96px;
  text-align: center;
  scroll-snap-align: start;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--mist);
  border: 1px solid rgba(242, 232, 213, 0.22);
  border-radius: 999px;
  padding: 0.5rem 0.25rem;
  white-space: nowrap;
  transition: border-color var(--transition), color var(--transition);
}

/* ===== 目录入口 ===== */
.page-about .about-entry {
  background: var(--deep);
  padding: 0 0 3.5rem;
}
.page-about .about-toc {
  background: var(--parchment);
  border-radius: 2px;
  box-shadow: var(--shadow-soft);
}
.page-about .about-toc ol {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .about-toc li {
  border-right: 1px solid var(--about-line);
  border-bottom: 1px solid var(--about-line);
}
.page-about .about-toc li:nth-child(2n) {
  border-right: 0;
}
.page-about .about-toc li:nth-last-child(-n+2) {
  border-bottom: 0;
}
.page-about .about-toc a {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  color: var(--about-ink);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 600;
  transition: background var(--transition);
}
.page-about .about-toc a:hover {
  background: rgba(0, 166, 81, 0.08);
}
.page-about .about-toc a span {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--green);
  font-weight: 700;
}

/* ===== 章节通用 ===== */
.page-about .about-chapter {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2.5rem;
  scroll-margin-top: calc(var(--header-h) + 1rem);
}
.page-about .about-chapter::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--about-line);
}
.page-about .about-chapter-index {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--green);
}
.page-about .about-chapter-title {
  font-family: var(--font-heading);
  font-size: var(--text-h2);
  font-weight: 900;
  letter-spacing: -0.5px;
  margin: 0;
  transition: color var(--transition);
}
.page-about section:target .about-chapter-title {
  color: var(--green);
}
.page-about section:target .about-chapter-index {
  background: var(--lime);
  color: var(--deep);
  padding: 0.15em 0.45em;
}
.page-about .about-chapter-light .about-chapter-title {
  color: var(--parchment);
}
.page-about .about-chapter-light::after {
  background: rgba(242, 232, 213, 0.2);
}
.page-about section:target .about-chapter-light .about-chapter-title {
  color: var(--lime);
}

/* ===== 01 草原的体育基因 ===== */
.page-about .about-gene {
  padding: var(--space-section) 0;
  background: var(--parchment);
}
.page-about .about-split {
  display: grid;
  gap: 2rem;
}
.page-about .about-maincol p {
  color: var(--about-ink);
  line-height: 1.8;
}
.page-about .about-lead {
  font-size: var(--text-big);
  font-weight: 600;
  line-height: 1.7;
  max-width: 36em;
  margin-bottom: 1.5rem;
}
.page-about .about-maincol > p:not(.about-lead) {
  max-width: 60ch;
  opacity: 0.84;
}
.page-about .about-gene-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 1.75rem 0 2.5rem;
}
.page-about .about-figure {
  margin: 0;
}
.page-about .about-gene-img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  aspect-ratio: 16 / 9;
  object-fit: cover;
}
.page-about .about-figure figcaption {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--mist);
  margin-top: 0.75rem;
}

/* ===== 旁注卡片 ===== */
.page-about .about-aside {
  background: var(--deep);
  color: var(--parchment);
  padding: 1.75rem 1.5rem;
  border-radius: 2px;
  transform: rotate(1.2deg);
  box-shadow: var(--shadow-soft);
  align-self: start;
}
.page-about .about-aside-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mist);
  border-bottom: 1px solid rgba(242, 232, 213, 0.2);
  padding-bottom: 0.75rem;
  margin-bottom: 1.25rem;
}
.page-about .about-aside-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
}
.page-about .about-aside-text {
  font-size: var(--text-sm);
  color: rgba(242, 232, 213, 0.7);
  margin: 0.35rem 0 1.5rem;
  line-height: 1.4;
}
.page-about .about-aside-text:last-child {
  margin-bottom: 0;
}

/* ===== 02 发展里程碑 ===== */
.page-about .about-milestone {
  background: var(--env);
  padding: var(--space-section) 0;
}
.page-about .about-milestone-layout {
  display: grid;
  gap: 2.5rem;
}
.page-about .about-milestone-list {
  border-left: 1px solid var(--steel);
  padding-left: 1.75rem;
  margin-left: 0.25rem;
}
.page-about .about-milestone-item {
  position: relative;
  padding-bottom: 2.25rem;
}
.page-about .about-milestone-item:last-child {
  padding-bottom: 0;
}
.page-about .about-milestone-item::before {
  content: "";
  position: absolute;
  left: calc(-1.75rem - 7px);
  top: 0.5rem;
  width: 14px;
  height: 14px;
  background: var(--deep);
  border: 3px solid var(--lime);
  border-radius: 50%;
  box-sizing: border-box;
}
.page-about .about-milestone-year {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: var(--text-h3);
  font-weight: 900;
  color: var(--green);
  letter-spacing: 0.02em;
  margin-bottom: 0.25rem;
}
.page-about .about-milestone-item h3 {
  font-family: var(--font-heading);
  font-size: var(--text-big);
  font-weight: 700;
  margin: 0 0 0.5rem;
  color: var(--about-ink);
}
.page-about .about-milestone-item p {
  font-size: var(--text-sm);
  line-height: 1.75;
  max-width: 48ch;
  opacity: 0.84;
  margin: 0;
}
.page-about .about-milestone-side {
  display: grid;
  gap: 1.5rem;
}
.page-about .about-milestone-img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  aspect-ratio: 4 / 5;
  object-fit: cover;
}
.page-about .about-milestone-note {
  background: var(--lime);
  color: var(--deep);
  padding: 1.5rem;
  border-radius: 2px;
  transform: rotate(-1deg);
  box-shadow: var(--shadow-soft);
}
.page-about .about-milestone-note .about-aside-num {
  color: var(--deep);
  font-size: clamp(1.75rem, 3vw, 2.25rem);
}
.page-about .about-milestone-note p {
  font-size: var(--text-sm);
  font-weight: 600;
  line-height: 1.4;
  margin: 0.35rem 0 1.25rem;
}
.page-about .about-milestone-note p:last-child {
  margin-bottom: 0;
}

/* ===== 03 团队与组织 ===== */
.page-about .about-team {
  position: relative;
  background: var(--deep);
  color: var(--parchment);
  padding: var(--space-section) 0;
}
.page-about .about-team::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 45%;
  height: 1px;
  background: var(--lime);
  transform: skewX(-30deg);
  transform-origin: right top;
}
.page-about .about-team-intro {
  max-width: 48em;
  margin-bottom: 2.5rem;
}
.page-about .about-team .about-lead {
  color: rgba(242, 232, 213, 0.85);
}
.page-about .about-team-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
  margin-bottom: 2.5rem;
}
.page-about .about-team-stat {
  border-top: 2px solid var(--green);
  padding-top: 0.75rem;
}
.page-about .about-team-stat b {
  display: block;
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 900;
  line-height: 1;
  color: var(--lime);
}
.page-about .about-team-stat span {
  display: block;
  margin-top: 0.35rem;
  font-size: var(--text-sm);
  color: rgba(242, 232, 213, 0.65);
}
.page-about .about-team-figure {
  margin: 0;
}
.page-about .about-team-img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-deep);
  aspect-ratio: 3 / 2;
  object-fit: cover;
}
.page-about .about-team-figure figcaption {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--mist);
  margin-top: 0.75rem;
}

/* ===== 04 品牌愿景 ===== */
.page-about .about-vision {
  position: relative;
  overflow: hidden;
  background: var(--green);
  color: var(--deep);
  padding: var(--space-section) 0;
}
.page-about .about-vision::before {
  content: "";
  position: absolute;
  right: -4rem;
  top: -4rem;
  width: 16rem;
  height: 16rem;
  border-radius: 50%;
  background: rgba(10, 14, 26, 0.08);
}
.page-about .about-vision::after {
  content: "";
  position: absolute;
  right: 2rem;
  bottom: -3rem;
  width: 8rem;
  height: 8rem;
  border-radius: 50%;
  background: rgba(200, 255, 0, 0.35);
}
.page-about .about-vision-quote {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 4vw, 3rem);
  font-weight: 900;
  line-height: 1.2;
  max-width: 18ch;
  margin: 2rem 0 1.5rem;
  position: relative;
}
.page-about .about-vision-quote::before {
  content: "“";
  display: block;
  font-family: var(--font-heading);
  font-size: 3em;
  line-height: 0.6;
  color: var(--deep);
  opacity: 0.25;
  margin-bottom: 0.15em;
}
.page-about .about-vision-text {
  max-width: 42em;
  font-size: var(--text-base);
  line-height: 1.8;
  opacity: 0.86;
  margin: 0 0 2.5rem;
  position: relative;
}
.page-about .about-vision-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  position: relative;
  z-index: 1;
}
.page-about .about-vision .btn-primary {
  background: var(--deep);
  border-color: var(--deep);
  color: var(--lime);
}
.page-about .about-vision .btn-outline {
  border-color: var(--deep);
  color: var(--deep);
}
.page-about .about-vision .btn-outline:hover {
  background: var(--deep);
  color: var(--lime);
}

/* ===== 桌面增强 ===== */
@media (min-width: 768px) {
  .page-about .about-hero {
    padding: calc(var(--header-h) + 5rem) 0 3.5rem;
  }
  .page-about .about-hero-desc {
    font-size: var(--text-big);
  }
  .page-about .about-rail span {
    flex: 1;
    min-width: 0;
    border: 0;
    border-left: 1px solid rgba(242, 232, 213, 0.22);
    border-radius: 0;
    text-align: left;
    padding-left: 1rem;
    position: relative;
  }
  .page-about .about-rail span:first-child {
    border-left: 0;
  }
  .page-about .about-rail span::before {
    content: "";
    position: absolute;
    left: -4px;
    top: 50%;
    transform: translateY(-50%);
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--lime);
  }
  .page-about .about-toc ol {
    grid-template-columns: repeat(4, 1fr);
  }
  .page-about .about-toc li,
  .page-about .about-toc li:nth-child(2n) {
    border-right: 1px solid var(--about-line);
    border-bottom: 0;
  }
  .page-about .about-toc li:last-child {
    border-right: 0;
  }
  .page-about .about-team-stats {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem 2rem;
  }
}

@media (min-width: 992px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 1fr) 240px;
    gap: 3rem;
  }
  .page-about .about-aside {
    margin-top: 0.5rem;
    position: sticky;
    top: calc(var(--header-h) + 2rem);
  }
  .page-about .about-milestone-layout {
    grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
    gap: 4rem;
    align-items: start;
  }
  .page-about .about-milestone-side {
    position: sticky;
    top: calc(var(--header-h) + 2rem);
  }
}

@media (min-width: 1080px) {
  .page-about .about-team-stats {
    grid-template-columns: repeat(6, 1fr);
  }
}