.page-about {
  --about-accent: var(--c-moss);
  --about-accent-deep: #3E5A45;
  --about-node: var(--c-clay);
  --about-node-deep: #9A4F28;
  --about-text: #2B3138;
  --about-title: #12151A;
  --about-muted: #6A7178;
  display: block;
  background: var(--c-ink);
  color: var(--c-paper);
}

/* ============ 首屏 ============ */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(40px, 7vw, 88px) 0 clamp(36px, 5vw, 64px);
  border-bottom: 1px solid rgba(60, 68, 78, .55);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -34%;
  right: -14%;
  width: min(720px, 78vw);
  height: min(720px, 78vw);
  background: radial-gradient(circle, rgba(94, 127, 99, .30), rgba(94, 127, 99, 0) 66%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .breadcrumb {
  margin-bottom: clamp(24px, 4vw, 48px);
}

.page-about .about-hero h1 {
  margin: 12px 0 0;
  font-size: clamp(32px, 6.2vw, 74px);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--c-paper);
  max-width: 20ch;
}

.page-about .about-hero__lede {
  margin: clamp(20px, 3vw, 32px) 0 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--c-fog);
}

.page-about .about-facts {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: clamp(32px, 5vw, 56px) 0 0;
  padding: 0;
}

.page-about .about-facts__item {
  padding: 18px 18px 16px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  background: rgba(35, 40, 48, .55);
  transition: border-color var(--ease), background var(--ease);
}

.page-about .about-facts__item:hover {
  border-color: var(--about-accent);
  background: rgba(94, 127, 99, .12);
}

.page-about .about-facts__num {
  display: block;
  font-size: clamp(22px, 3.4vw, 32px);
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--c-paper);
  line-height: 1.1;
}

.page-about .about-facts__label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-fog);
}

@media (min-width: 720px) {
  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--gap);
  }
}

/* ============ 长文布局 ============ */
.page-about .story-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 5vw, 48px);
  padding: clamp(36px, 6vw, 72px) 0 clamp(64px, 10vw, 140px);
}

.page-about .story-index {
  min-width: 0;
}

.page-about .story-index__title {
  display: none;
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--c-fog);
  text-transform: uppercase;
}

.page-about .story-index__list {
  list-style: none;
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-about .story-index__list > li {
  flex: 0 0 auto;
}

.page-about .story-index__link {
  display: flex;
  align-items: baseline;
  gap: 7px;
  white-space: nowrap;
  padding: 8px 14px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-pill);
  color: var(--c-fog);
  font-size: 13px;
  text-decoration: none;
  transition: color var(--ease), border-color var(--ease), background var(--ease);
}

.page-about .story-index__link:hover,
.page-about .story-index__link:focus-visible {
  color: var(--c-paper);
  border-color: var(--about-accent);
  background: rgba(94, 127, 99, .14);
}

.page-about .story-index__num {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--c-moss-soft);
}

@media (min-width: 1000px) {
  .page-about .story-layout {
    grid-template-columns: 218px minmax(0, 1fr);
    gap: clamp(48px, 6vw, 96px);
  }

  .page-about .story-index {
    position: sticky;
    top: calc(var(--top-h) + 32px);
    align-self: start;
    padding-left: 18px;
    border-left: 1px solid var(--c-line);
  }

  .page-about .story-index__title {
    display: block;
  }

  .page-about .story-index__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding: 0;
  }

  .page-about .story-index__link {
    border: 0;
    border-radius: 0;
    padding: 9px 0;
    font-size: 14px;
    white-space: normal;
    line-height: 1.5;
  }

  .page-about .story-index__link:hover {
    background: transparent;
    padding-left: 5px;
  }
}

/* ============ 米白正文面板 ============ */
.page-about .story-body {
  min-width: 0;
  background: var(--c-paper);
  border-radius: var(--r-xl);
  padding: clamp(26px, 4.5vw, 68px);
  color: var(--about-text);
}

.page-about .story-body p {
  margin: 0 0 18px;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--about-text);
}

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

.page-about .story-body p.story-lede {
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.75;
  color: var(--about-title);
  font-weight: 500;
}

.page-about .story-body a {
  color: var(--about-accent-deep);
  text-decoration: underline;
  text-decoration-color: rgba(94, 127, 99, .45);
  text-underline-offset: 3px;
  transition: text-decoration-color var(--ease);
}

.page-about .story-body a:hover {
  text-decoration-color: var(--about-accent);
}

@media (min-width: 768px) {
  .page-about .story-body p {
    font-size: 17px;
  }
}

/* ============ 章节 ============ */
.page-about .story-section + .story-section {
  margin-top: clamp(56px, 8vw, 112px);
  padding-top: clamp(48px, 7vw, 96px);
  border-top: 1px dashed rgba(18, 21, 26, .22);
}

.page-about .story-section__num {
  display: block;
  font-size: clamp(38px, 6vw, 64px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.04em;
  color: rgba(18, 21, 26, .18);
  margin-bottom: 10px;
}

.page-about .story-section__title {
  margin: 0 0 20px;
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 700;
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--about-title);
  max-width: 24ch;
}

/* ============ 三条入口 ============ */
.page-about .entry-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: 28px;
}

.page-about .entry-card {
  padding: 20px 22px;
  border: 1px solid rgba(18, 21, 26, .14);
  border-left: 3px solid var(--about-accent);
  border-radius: var(--r-md);
  background: rgba(94, 127, 99, .07);
  transition: border-color var(--ease), transform var(--ease);
}

.page-about .entry-card:hover {
  transform: translateY(-2px);
  border-color: var(--about-accent);
}

.page-about .entry-card__title {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--about-title);
}

.page-about .entry-card__text {
  margin: 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.75;
  color: #4A5158;
}

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

/* ============ 配图 ============ */
.page-about .story-figure {
  margin: clamp(24px, 4vw, 36px) 0;
}

.page-about .story-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--r-lg);
  object-fit: cover;
  background: var(--c-slate);
}

.page-about .story-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--about-muted);
}

/* ============ 流程步骤 ============ */
.page-about .flow-steps {
  list-style: none;
  margin: 26px 0;
  padding: 0;
}

.page-about .flow-steps > li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 14px;
  padding: 18px 0;
  border-top: 1px solid rgba(18, 21, 26, .12);
}

.page-about .flow-steps > li:last-child {
  border-bottom: 1px solid rgba(18, 21, 26, .12);
}

.page-about .flow-steps__idx {
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--about-accent);
  padding-top: 4px;
}

.page-about .flow-steps__title {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  color: var(--about-title);
}

.page-about .flow-steps p {
  margin: 0;
  max-width: 54ch;
  font-size: 15px;
  line-height: 1.75;
  color: #4A5158;
}

/* ============ 旁注卡片 ============ */
.page-about .side-note {
  display: block;
  margin: 30px 0 0;
  padding: 20px 22px;
  border: 1px solid rgba(94, 127, 99, .40);
  border-radius: var(--r-lg);
  background: rgba(163, 183, 154, .34);
  text-decoration: none;
  transition: border-color var(--ease), background var(--ease), transform var(--ease);
}

.page-about .side-note:hover {
  transform: translateY(-2px);
  border-color: var(--about-accent);
  background: rgba(163, 183, 154, .5);
}

.page-about .side-note__label {
  display: block;
  margin-bottom: 8px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--about-accent-deep);
}

.page-about .story-body .side-note p {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.75;
  color: #24302A;
}

/* ============ 赛季时间轴 ============ */
.page-about .season-timeline {
  list-style: none;
  margin: 30px 0 0;
  padding: 0 0 0 30px;
  border-left: 1px solid rgba(18, 21, 26, .18);
}

.page-about .season-node {
  position: relative;
  padding: 0 0 28px;
}

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

.page-about .season-node::before {
  content: "";
  position: absolute;
  left: -35px;
  top: 6px;
  width: 9px;
  height: 9px;
  box-sizing: border-box;
  border-radius: 50%;
  background: var(--c-paper);
  border: 2px solid var(--about-node);
  transition: background var(--ease), transform var(--ease);
}

.page-about .season-node:hover::before {
  background: var(--about-node);
  transform: scale(1.3);
}

.page-about .season-node__tag {
  display: block;
  margin-bottom: 6px;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--about-node-deep);
}

.page-about .season-node__title {
  margin: 0 0 6px;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--about-title);
}

.page-about .season-node__desc {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.78;
  color: #4A5158;
}

/* ============ 合作数据条 ============ */
.page-about .partner-line {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin: 28px 0;
  border: 1px solid rgba(18, 21, 26, .14);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.page-about .partner-line__cell {
  padding: 20px 22px;
  background: rgba(163, 183, 154, .18);
}

.page-about .partner-line__cell + .partner-line__cell {
  border-top: 1px solid rgba(18, 21, 26, .12);
}

.page-about .partner-line__num {
  display: block;
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: 0.03em;
  color: var(--about-title);
}

.page-about .partner-line__label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.6;
  color: #4A5158;
}

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

  .page-about .partner-line__cell + .partner-line__cell {
    border-top: 0;
    border-left: 1px solid rgba(18, 21, 26, .12);
  }
}

/* ============ 收束链接 ============ */
.page-about .promise-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 26px;
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid rgba(18, 21, 26, .12);
}

.page-about .promise-links .link-more {
  font-size: 15px;
  font-weight: 500;
  color: var(--about-accent-deep);
  text-decoration: none;
  border-bottom: 1px solid rgba(94, 127, 99, .5);
  padding-bottom: 3px;
  transition: border-color var(--ease), color var(--ease);
}

.page-about .promise-links .link-more:hover {
  border-bottom-color: var(--about-accent);
  color: var(--about-title);
}

/* ============ 减少动效 ============ */
@media (prefers-reduced-motion: reduce) {
  .page-about .entry-card,
  .page-about .side-note,
  .page-about .season-node::before,
  .page-about .story-index__link,
  .page-about .about-facts__item,
  .page-about .promise-links .link-more {
    transition: none;
  }

  .page-about .entry-card:hover,
  .page-about .side-note:hover {
    transform: none;
  }

  .page-about .season-node:hover::before {
    transform: none;
  }
}