.page-about {
  --about-ruler-w: 108px;
  --about-card-bg: rgba(90, 46, 134, 0.16);
  --about-card-shadow: 6px 6px 0 0 rgba(20, 18, 37, 0.6);
  display: block;
  background-color: var(--hj-indigo);
  background-image: repeating-linear-gradient(
    90deg,
    rgba(245, 241, 232, 0.026) 0 1px,
    transparent 1px 7px
  );
  color: var(--hj-paper);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: 32px 0 56px;
  background:
    radial-gradient(120% 92% at 10% 0%, rgba(90, 46, 134, 0.6) 0%, transparent 62%),
    linear-gradient(180deg, var(--hj-ink) 0%, var(--hj-indigo) 100%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(118deg, rgba(58, 27, 92, 0.92) 0 28%, rgba(58, 27, 92, 0) 28.2%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 128px;
  z-index: -1;
  background: linear-gradient(90deg, rgba(224, 180, 74, 0.16), transparent 74%);
  clip-path: polygon(0 100%, 100% 0, 100% 100%);
  pointer-events: none;
}

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

.page-about .about-hero__crumb {
  margin-bottom: 26px;
}

.page-about .about-hero__eyebrow {
  margin: 0 0 14px;
  color: var(--hj-gold);
}

.page-about .about-hero__title {
  margin: 0 0 20px;
  max-width: 22ch;
  font-family: var(--hj-serif);
  font-weight: 700;
  font-size: 30px;
  line-height: 1.28;
  letter-spacing: 0.01em;
  color: var(--hj-paper);
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 62ch;
  color: var(--hj-paper);
  opacity: 0.86;
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 34px 0 0;
  padding: 0;
  background: var(--hj-line-soft);
  border: 1px solid var(--hj-line-soft);
}

.page-about .about-hero__fact {
  padding: 14px 16px;
  background: rgba(14, 16, 48, 0.72);
}

.page-about .about-hero__fact dt {
  margin: 0 0 6px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--hj-mist);
}

.page-about .about-hero__fact dd {
  margin: 0;
  font-size: 22px;
  line-height: 1;
  color: var(--hj-gold-soft);
}

/* ---------- 长卷栅格 ---------- */
.page-about .about-scroll {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  padding-top: 44px;
  padding-bottom: 76px;
}

/* ---------- 年份刻度尺 ---------- */
.page-about .about-ruler__inner {
  position: static;
}

.page-about .about-ruler__label {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--hj-mist);
}

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

.page-about .about-ruler__item {
  flex: 0 0 auto;
}

.page-about .about-ruler__link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border: 1px solid var(--hj-line-soft);
  background: rgba(14, 16, 48, 0.55);
  color: var(--hj-mist);
  text-decoration: none;
  transition: color 0.22s ease, border-color 0.22s ease;
}

.page-about .about-ruler__link:hover,
.page-about .about-ruler__link:focus-visible {
  color: var(--hj-gold-soft);
  border-color: var(--hj-gold);
  outline: none;
}

.page-about .about-ruler__tick {
  display: block;
  width: 16px;
  height: 1px;
  background: var(--hj-line);
}

.page-about .about-ruler__year {
  font-family: var(--hj-mono);
  font-size: 14px;
  font-variant-numeric: tabular-nums;
}

/* ---------- 章节 ---------- */
.page-about .about-section {
  padding: 0 0 42px;
}

.page-about .about-section + .about-section {
  padding-top: 40px;
  border-top: 1px solid var(--hj-line-soft);
}

.page-about .about-section--last {
  padding-bottom: 8px;
}

.page-about .about-h2 {
  margin: 0 0 16px;
  font-family: var(--hj-serif);
  font-weight: 600;
  font-size: 24px;
  line-height: 1.32;
  letter-spacing: 0.01em;
  color: var(--hj-paper);
}

.page-about .about-section > .hj-text {
  max-width: 68ch;
  margin: 0 0 14px;
  color: rgba(245, 241, 232, 0.84);
}

.page-about .about-section > .hj-text:last-child {
  margin-bottom: 0;
}

.page-about .about-note {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--hj-mist);
}

.page-about .about-note a {
  color: var(--hj-gold-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 26px 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--hj-line);
  background: rgba(20, 18, 37, 0.6);
}

.page-about .about-figure__cap {
  margin: 10px 0 0;
  font-size: 13px;
  color: var(--hj-mist);
}

.page-about .about-figure--glossary {
  max-width: 520px;
}

/* ---------- 里程碑 ---------- */
.page-about .about-timeline {
  position: relative;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 28px;
  bottom: 28px;
  width: 1px;
  background: linear-gradient(180deg, var(--hj-gold), rgba(224, 180, 74, 0.06));
}

.page-about .about-mile {
  position: relative;
  margin: 0 0 16px 26px;
  padding: 20px 20px 18px;
  background: var(--about-card-bg);
  border: 1px solid var(--hj-line);
  box-shadow: var(--about-card-shadow);
}

.page-about .about-mile::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 26px;
  width: 9px;
  height: 9px;
  background: var(--hj-gold);
  transform: rotate(45deg);
  box-shadow: 0 0 0 3px rgba(224, 180, 74, 0.18);
}

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

.page-about .about-mile__head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 8px;
}

.page-about .about-mile__year {
  font-size: 28px;
  line-height: 1;
  color: var(--hj-gold);
  font-variant-numeric: tabular-nums;
}

.page-about .about-stamp {
  display: inline-block;
  padding: 2px 9px;
  border: 1px solid rgba(224, 180, 74, 0.7);
  border-radius: 2px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--hj-gold);
  transform: rotate(-1.5deg);
}

.page-about .about-mile__title {
  margin: 0 0 8px;
  font-family: var(--hj-serif);
  font-size: 18px;
  font-weight: 600;
  color: var(--hj-paper);
}

.page-about .about-mile__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(245, 241, 232, 0.8);
}

/* ---------- 两套体系 ---------- */
.page-about .about-pair {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 24px;
}

.page-about .about-pair__col {
  padding: 22px 20px;
  border: 1px solid var(--hj-line-soft);
  background: linear-gradient(180deg, rgba(58, 27, 92, 0.44), rgba(14, 16, 48, 0.34));
}

.page-about .about-pair__col--b {
  border-color: var(--hj-line);
}

.page-about .about-pair__title {
  margin: 0 0 8px;
  font-family: var(--hj-serif);
  font-size: 20px;
  font-weight: 600;
  color: var(--hj-gold-soft);
}

.page-about .about-pair__kicker {
  margin: 0 0 14px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--hj-mist);
}

.page-about .about-pair__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(245, 241, 232, 0.82);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 24px;
}

.page-about .about-team__card {
  padding: 20px 18px;
  background: var(--about-card-bg);
  border-top: 2px solid var(--hj-gold);
  border-right: 1px solid var(--hj-line-soft);
  border-bottom: 1px solid var(--hj-line-soft);
  border-left: 1px solid var(--hj-line-soft);
  box-shadow: 5px 5px 0 0 rgba(20, 18, 37, 0.5);
}

.page-about .about-team__num {
  margin: 0 0 12px;
  font-size: 30px;
  line-height: 1;
  color: var(--hj-gold-soft);
  font-variant-numeric: tabular-nums;
}

.page-about .about-team__num small {
  margin-left: 4px;
  font-size: 13px;
  color: var(--hj-mist);
}

.page-about .about-team__role {
  margin: 0 0 8px;
  font-family: var(--hj-serif);
  font-size: 18px;
  font-weight: 600;
  color: var(--hj-paper);
}

.page-about .about-team__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(245, 241, 232, 0.78);
}

/* ---------- 流程 ---------- */
.page-about .about-steps {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-step {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 12px;
  padding: 16px 0;
  border-top: 1px solid var(--hj-line-soft);
}

.page-about .about-step:last-child {
  border-bottom: 1px solid var(--hj-line-soft);
}

.page-about .about-step__no {
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--hj-gold);
  font-variant-numeric: tabular-nums;
}

.page-about .about-step__title {
  margin: 0 0 6px;
  font-family: var(--hj-serif);
  font-size: 17px;
  font-weight: 600;
  color: var(--hj-paper);
}

.page-about .about-step__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.82;
  color: rgba(245, 241, 232, 0.78);
}

/* ---------- 术语库 ---------- */
.page-about .about-terms {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-term {
  padding: 18px 18px 16px;
  border: 1px solid var(--hj-line-soft);
  background: rgba(90, 46, 134, 0.14);
}

.page-about .about-term__name {
  margin: 0 0 8px;
  font-family: var(--hj-serif);
  font-size: 18px;
  font-weight: 600;
  color: var(--hj-gold-soft);
}

.page-about .about-term__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(245, 241, 232, 0.78);
}

/* ---------- 年度汇总 ---------- */
.page-about .about-annual {
  margin-top: 26px;
  padding: 22px 18px 18px;
  border: 1px solid var(--hj-line);
  background: linear-gradient(180deg, rgba(58, 27, 92, 0.4), rgba(14, 16, 48, 0.36));
  box-shadow: var(--about-card-shadow);
}

.page-about .about-annual__grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 6px;
}

.page-about .about-annual__cell {
  display: block;
  height: 62px;
  border: 1px solid rgba(169, 167, 196, 0.22);
  border-bottom-width: 3px;
}

.page-about .about-annual__cell[data-level="1"] {
  background: linear-gradient(180deg, var(--hj-heat-low), rgba(46, 143, 168, 0.18));
  border-bottom-color: var(--hj-heat-low);
}

.page-about .about-annual__cell[data-level="2"] {
  background: linear-gradient(180deg, var(--hj-heat-mid), rgba(224, 138, 46, 0.18));
  border-bottom-color: var(--hj-heat-mid);
}

.page-about .about-annual__cell[data-level="3"] {
  background: linear-gradient(180deg, var(--hj-heat-high), rgba(199, 69, 44, 0.18));
  border-bottom-color: var(--hj-heat-high);
}

.page-about .about-annual__ids {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 6px;
  margin: 8px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-annual__ids li {
  text-align: center;
  font-size: 11px;
  color: var(--hj-mist);
}

.page-about .about-annual__legend {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 14px;
  margin: 18px 0 0;
  font-size: 13px;
  color: var(--hj-mist);
}

.page-about .about-annual__chip {
  display: inline-block;
  width: 22px;
  height: 8px;
  margin-right: -8px;
}

.page-about .about-annual__chip[data-level="1"] {
  background: var(--hj-heat-low);
}

.page-about .about-annual__chip[data-level="2"] {
  background: var(--hj-heat-mid);
}

.page-about .about-annual__chip[data-level="3"] {
  background: var(--hj-heat-high);
}

/* ---------- 下一页入口 ---------- */
.page-about .about-next {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 22px;
}

.page-about .about-next__card {
  display: block;
  padding: 18px 18px 20px;
  border: 1px solid var(--hj-line-soft);
  background: rgba(90, 46, 134, 0.14);
  text-decoration: none;
  transition: border-color 0.22s ease, background-color 0.22s ease, transform 0.22s ease;
}

.page-about .about-next__card:hover,
.page-about .about-next__card:focus-visible {
  border-color: var(--hj-gold);
  background: rgba(90, 46, 134, 0.3);
  transform: translateY(-2px);
  outline: none;
}

.page-about .about-next__kicker {
  display: block;
  margin-bottom: 8px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--hj-gold);
}

.page-about .about-next__title {
  display: block;
  font-family: var(--hj-serif);
  font-size: 16px;
  line-height: 1.6;
  color: var(--hj-paper);
}

.page-about .about-note--mail {
  margin-top: 22px;
}

/* ---------- 中屏 ---------- */
@media (min-width: 620px) {
  .page-about .about-hero {
    padding: 44px 0 72px;
  }

  .page-about .about-hero__title {
    font-size: 38px;
  }

  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-h2 {
    font-size: 28px;
  }

  .page-about .about-terms,
  .page-about .about-team {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-next {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-step {
    grid-template-columns: 48px minmax(0, 1fr);
    gap: 16px;
  }

  .page-about .about-annual__grid,
  .page-about .about-annual__ids {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }
}

/* ---------- 宽屏：左尺 + 右栏 ---------- */
@media (min-width: 860px) {
  .page-about .about-pair {
    grid-template-columns: 1fr 1fr;
    gap: 22px;
  }
}

@media (min-width: 1040px) {
  .page-about .about-scroll {
    grid-template-columns: var(--about-ruler-w) minmax(0, 1fr);
    gap: 54px;
    padding-top: 56px;
  }

  .page-about .about-ruler__inner {
    position: sticky;
    top: 132px;
  }

  .page-about .about-ruler__list {
    display: block;
    padding-bottom: 0;
    overflow: visible;
  }

  .page-about .about-ruler__item + .about-ruler__item {
    margin-top: 4px;
  }

  .page-about .about-ruler__link {
    padding: 10px 0;
    border: 0;
    background: none;
    gap: 12px;
  }

  .page-about .about-ruler__tick {
    width: 26px;
  }

  .page-about .about-ruler__year {
    font-size: 15px;
  }

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

  .page-about .about-h2 {
    font-size: 32px;
  }

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

  .page-about .about-terms {
    grid-template-columns: 1fr 1fr;
    gap: 14px;
  }

  .page-about .about-mile:nth-child(even) {
    margin-left: 52px;
  }

  .page-about .about-next {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-figure--glossary {
    margin-left: auto;
    margin-right: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-ruler__link,
  .page-about .about-next__card {
    transition: none;
  }

  .page-about .about-next__card:hover,
  .page-about .about-next__card:focus-visible {
    transform: none;
  }
}