.page-about {
  --about-rail: 118px;
  --about-edge: clamp(16px, 4vw, 40px);
  background: var(--paper);
  color: var(--ink);
  overflow-x: hidden;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs {
  padding-top: clamp(16px, 2.6vw, 26px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(22px, 4vw, 40px) 0 clamp(34px, 5.5vw, 70px);
  border-bottom: var(--line) solid var(--ink);
  background-image:
    repeating-linear-gradient(135deg, rgba(30, 107, 63, 0.055) 0 5px, transparent 5px 15px);
}

.page-about .about-hero__inner {
  position: relative;
}

.page-about .about-hero__title {
  margin: 0.22em 0 0.34em;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(36px, 7.6vw, 100px);
  line-height: 0.99;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-about .about-hero__title span {
  display: block;
  color: var(--grass);
  -webkit-text-stroke: 0;
}

.page-about .about-hero__lead {
  max-width: 660px;
  margin: 0;
  font-size: clamp(15px, 1.15vw, 18px);
  line-height: 1.8;
  color: var(--ink-2);
}

.page-about .about-hero__scale {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  margin: clamp(24px, 3.6vw, 42px) 0 0;
  padding: 0;
  border: var(--line) solid var(--ink);
  background: var(--card);
  box-shadow: var(--shadow-sm);
}

.page-about .about-hero__scale li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 16px 18px;
  border-bottom: 2px solid rgba(16, 27, 45, 0.14);
}

.page-about .about-hero__scale li:nth-child(odd) {
  border-right: 2px solid rgba(16, 27, 45, 0.14);
}

.page-about .about-hero__scale li:nth-last-child(-n+2) {
  border-bottom: none;
}

.page-about .about-hero__num {
  font-size: clamp(26px, 3.6vw, 44px);
  font-weight: 700;
  line-height: 1;
  color: var(--grass);
}

.page-about .about-hero__key {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--fog);
}

.page-about .about-toc {
  margin-top: clamp(20px, 3vw, 32px);
}

.page-about .about-toc__list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
}

.page-about .about-toc__list a {
  display: inline-block;
  padding: 7px 13px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink);
  text-decoration: none;
  background: var(--card);
  border: 2px solid var(--ink);
  transition: background 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-about .about-toc__list a:hover,
.page-about .about-toc__list a:focus-visible {
  background: var(--yellow);
  transform: translate(-2px, -2px);
}

/* ---------- 章节骨架 ---------- */
.page-about .chapter {
  padding: clamp(38px, 6vw, 82px) 0;
}

.page-about .chapter__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

.page-about .chapter__rail {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.page-about .chapter__year {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--grass);
}

.page-about .chapter__rail-line {
  flex: 1;
  height: 3px;
  background: var(--ink);
  opacity: 0.85;
}

.page-about .chapter__body {
  max-width: 860px;
}

.page-about .chapter__title {
  margin: 0.4em 0 0.7em;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(24px, 3.4vw, 44px);
  line-height: 1.16;
  letter-spacing: -0.01em;
}

.page-about .chapter__body p {
  margin: 0 0 1.1em;
  font-size: 16px;
  line-height: 1.78;
  color: var(--ink-2);
}

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

.page-about .chapter__tail {
  margin-top: 1.4em;
  padding-left: 16px;
  border-left: 4px solid var(--orange);
}

.page-about .chapter__body a {
  color: var(--grass);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 2px;
}

.page-about .chapter__body a:hover {
  color: var(--red);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: clamp(22px, 3vw, 34px) 0 0;
  border: var(--line) solid var(--ink);
  background: var(--card);
  box-shadow: var(--shadow);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 10 / 7;
}

.page-about .about-figure__cap {
  padding: 11px 16px 13px;
  font-size: 12.5px;
  letter-spacing: 0.03em;
  color: var(--fog);
  border-top: 2px solid rgba(16, 27, 45, 0.16);
}

/* ---------- 时间轴 ---------- */
.page-about .tl {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: clamp(18px, 3vw, 30px) 0 0;
  padding: 0;
}

.page-about .tl__item {
  position: relative;
  padding: 22px 20px 24px;
  background: var(--card);
  border: var(--line) solid var(--ink);
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.page-about .tl__item:hover {
  transform: translate(-2px, -2px);
  box-shadow: 7px 7px 0 var(--grass);
}

.page-about .tl__item:nth-child(odd) {
  border-top-color: var(--grass);
  border-top-width: 8px;
}

.page-about .tl__item:nth-child(even) {
  border-top-color: var(--ink);
  border-top-width: 8px;
}

.page-about .tl__season {
  display: block;
  font-size: 13px;
  letter-spacing: 0.05em;
  color: var(--grass);
}

.page-about .tl__badge {
  display: inline-block;
  margin-top: 8px;
  padding: 3px 9px;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--ink);
  background: var(--yellow);
  border: 2px solid var(--ink);
}

.page-about .tl__title {
  margin: 0.7em 0 0.5em;
  font-family: var(--font-head);
  font-size: 19px;
  font-weight: 800;
  line-height: 1.32;
}

.page-about .tl__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--fog);
}

/* ---------- 折线图 ---------- */
.page-about .about-chart {
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: 22px 20px 14px;
  background: var(--ink);
  border: var(--line) solid var(--ink);
  box-shadow: var(--shadow);
}

.page-about .about-chart svg {
  display: block;
  width: 100%;
  height: auto;
  overflow: visible;
}

.page-about .about-chart__line {
  stroke: var(--grass-2);
}

.page-about .about-chart__dot {
  fill: var(--yellow);
  stroke: var(--ink);
  stroke-width: 2.5;
}

.page-about .about-chart__cap {
  margin: 10px 0 0;
  font-size: 12.5px;
  letter-spacing: 0.03em;
  color: rgba(245, 240, 230, 0.72);
}

/* ---------- 图文分栏 ---------- */
.page-about .split {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 34px);
  align-items: start;
}

.page-about .split__text p {
  margin: 0 0 1.1em;
}

.page-about .split__note {
  padding: 12px 14px;
  font-size: 14px;
  background: var(--paper-2);
  border: 2px solid var(--ink);
}

.page-about .split__media {
  margin: 0;
  border: var(--line) solid var(--ink);
  background: var(--card);
  box-shadow: var(--shadow);
}

.page-about .split__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

.page-about .split__media figcaption {
  padding: 11px 16px 13px;
  font-size: 12.5px;
  letter-spacing: 0.03em;
  color: var(--fog);
  border-top: 2px solid rgba(16, 27, 45, 0.16);
}

/* ---------- 覆盖版图网格 ---------- */
.page-about .cover-grid {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
}

.page-about .cover-grid__item {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: 110px;
  padding: 16px 16px 18px;
  background: var(--card);
  border: var(--line) solid var(--ink);
  box-shadow: var(--shadow-sm);
}

.page-about .cover-grid__item:nth-child(3n+2) {
  background: var(--paper-2);
}

.page-about .cover-grid__item:nth-child(3n) {
  border-left-width: 10px;
  border-left-color: var(--grass);
}

.page-about .cover-grid__num {
  font-size: clamp(26px, 4vw, 40px);
  font-weight: 700;
  line-height: 1;
  color: var(--ink);
}

.page-about .cover-grid__key {
  margin-top: 8px;
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--fog);
}

/* ---------- 深墨蓝区块 ---------- */
.page-about .chapter--ink {
  background: var(--ink);
  color: var(--paper);
}

.page-about .chapter--ink .chapter__year {
  color: var(--yellow);
}

.page-about .chapter--ink .chapter__rail-line {
  background: var(--yellow);
  opacity: 0.6;
}

.page-about .chapter--ink .chapter__title {
  color: var(--paper);
}

.page-about .chapter--ink .chapter__body p {
  color: rgba(245, 240, 230, 0.82);
}

.page-about .eyebrow--light {
  color: var(--yellow);
}

.page-about .ink-lead {
  font-size: 16.5px !important;
  color: rgba(245, 240, 230, 0.92) !important;
}

.page-about .quote-block {
  position: relative;
  margin: clamp(22px, 3vw, 34px) 0;
  padding: 24px 22px 22px 30px;
  background: var(--ink-2);
  border: var(--line) solid var(--yellow);
  box-shadow: 6px 6px 0 var(--grass);
}

.page-about .quote-block::before {
  content: "“";
  position: absolute;
  top: 2px;
  left: 10px;
  font-family: var(--font-head);
  font-size: 54px;
  line-height: 1;
  color: var(--yellow);
  opacity: 0.6;
}

.page-about .quote-block__text {
  margin: 0 0 12px !important;
  font-size: 16.5px !important;
  line-height: 1.75 !important;
  color: var(--paper) !important;
}

.page-about .quote-block__source {
  margin: 0 !important;
  font-family: var(--font-mono);
  font-size: 12px !important;
  letter-spacing: 0.08em;
  color: var(--yellow) !important;
}

.page-about .about-figure--ink {
  box-shadow: 6px 6px 0 var(--grass);
}

.page-about .about-figure--ink .about-figure__cap {
  background: var(--ink-2);
  color: rgba(245, 240, 230, 0.7);
  border-top-color: rgba(245, 240, 230, 0.2);
}

.page-about .ink-note {
  padding-left: 16px;
  border-left: 4px solid var(--orange);
}

.page-about .chapter--ink .chapter__body a {
  color: var(--yellow);
}

/* ---------- 下一个赛季 ---------- */
.page-about .next-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin-top: clamp(18px, 3vw, 28px);
  border-top: var(--line) solid var(--ink);
}

.page-about .next-grid__col {
  padding: 20px 0 22px;
  border-bottom: 2px solid rgba(16, 27, 45, 0.16);
}

.page-about .next-grid__title {
  margin: 0 0 0.55em;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 800;
  line-height: 1.32;
  color: var(--ink);
}

.page-about .next-grid__col p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--fog);
}

.page-about .about-cta {
  margin-top: clamp(28px, 4vw, 44px);
  padding: clamp(22px, 3vw, 30px);
  background: var(--paper-2);
  border: var(--line) solid var(--ink);
  box-shadow: var(--shadow);
}

.page-about .about-cta__text {
  margin: 0 0 18px !important;
  font-size: 16px !important;
  color: var(--ink) !important;
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

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

  .page-about .about-hero__scale li {
    border-bottom: none;
  }

  .page-about .about-hero__scale li:nth-child(odd) {
    border-right: 2px solid rgba(16, 27, 45, 0.14);
  }

  .page-about .about-hero__scale li:last-child {
    border-right: none;
  }

  .page-about .split {
    grid-template-columns: 1fr minmax(0, 0.92fr);
    align-items: stretch;
  }

  .page-about .split__media {
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
  }

  .page-about .cover-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
  }

  .page-about .next-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 clamp(16px, 2.4vw, 28px);
  }

  .page-about .next-grid__col {
    border-bottom: none;
    border-top: 4px solid var(--grass);
    margin-top: -3px;
    padding-top: 20px;
  }
}

/* ---------- 桌面：左侧年份刻度 + 内容 ---------- */
@media (min-width: 960px) {
  .page-about .chapter__grid {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(22px, 3vw, 44px);
  }

  .page-about .chapter__rail {
    position: sticky;
    top: calc(var(--topline-h) + 28px);
    align-self: start;
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    margin-bottom: 0;
    padding-top: 6px;
  }

  .page-about .chapter__year {
    font-size: 22px;
    line-height: 1;
    writing-mode: horizontal-tb;
  }

  .page-about .chapter__rail-line {
    flex: initial;
    width: 3px;
    height: clamp(90px, 22vh, 190px);
  }

  .page-about .chapter__body {
    max-width: 900px;
  }

  .page-about .about-hero__title {
    max-width: 15ch;
  }

  .page-about .tl {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
    padding-top: 34px;
    position: relative;
  }

  .page-about .tl::before {
    content: "";
    position: absolute;
    top: 15px;
    left: 6%;
    right: 6%;
    height: 3px;
    background: var(--ink);
  }

  .page-about .tl__item::after {
    content: "";
    position: absolute;
    top: -26px;
    left: 20px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--yellow);
    border: 3px solid var(--ink);
  }
}

/* ---------- 宽屏 ---------- */
@media (min-width: 1240px) {
  .page-about {
    --about-rail: 132px;
  }

  .page-about .about-hero__num {
    font-size: 46px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl__item,
  .page-about .about-toc__list a {
    transition: none;
  }

  .page-about .tl__item:hover {
    transform: none;
  }
}