.page-about {
  --ch-gap: clamp(56px, 11vw, 132px);
  --ch-num: clamp(72px, 13vw, 152px);
  background: var(--paper);
  color: var(--ink);
  overflow-x: hidden;
}

.page-about .mission {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px 72px;
}

@media (min-width: 760px) {
  .page-about .mission {
    padding: 0 40px 112px;
  }
}

/* ---------- 页面头部 ---------- */
.page-about .mission-head {
  padding: clamp(40px, 7vw, 88px) 0 clamp(56px, 9vw, 112px);
  position: relative;
}

.page-about .mission-head .breadcrumb {
  margin-bottom: 36px;
}

.page-about .mission-head__kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--amber-deep);
  margin: 0 0 18px;
}

.page-about .mission-head__title {
  font-size: clamp(38px, 7vw, 96px);
  line-height: 1.04;
  letter-spacing: -0.035em;
  font-weight: 900;
  margin: 0 0 32px;
  max-width: 15ch;
}

.page-about .mission-head__lede {
  font-size: clamp(16px, 1.3vw, 18px);
  line-height: 1.9;
  color: var(--ink-soft);
  max-width: 38em;
  margin: 0;
}

.page-about .mission-head__facts {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
  margin: 48px 0 0;
  padding: 0;
}

.page-about .mission-head__facts li {
  background: var(--paper);
  padding: 20px 18px 22px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 13px;
  color: var(--grey);
  line-height: 1.4;
}

.page-about .mission-head__facts li span {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.5vw, 34px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--ink);
}

@media (min-width: 720px) {
  .page-about .mission-head__facts {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ---------- 章节基座 ---------- */
.page-about .mission-chapter {
  position: relative;
  padding: var(--ch-gap) 0;
  border-top: 1px solid var(--rule);
}

.page-about .mission-chapter__num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--ch-num);
  font-weight: 700;
  line-height: 0.85;
  letter-spacing: -0.055em;
  color: var(--amber);
  margin: 0 0 16px;
  user-select: none;
}

.page-about .mission-chapter__kicker {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--grey);
  margin: 0 0 16px;
}

.page-about .mission-chapter__title {
  font-size: clamp(26px, 4vw, 42px);
  font-weight: 900;
  letter-spacing: -0.025em;
  line-height: 1.18;
  margin: 0 0 28px;
  max-width: 18ch;
}

.page-about .mission-chapter__lead {
  font-size: 17px;
  line-height: 1.9;
  color: var(--ink-soft);
  max-width: 38em;
  margin: 0 0 8px;
}

.page-about .mission-chapter__grid {
  display: grid;
  gap: 40px;
  margin-top: 8px;
}

.page-about .mission-chapter__text p {
  font-size: 17px;
  line-height: 1.9;
  margin: 0 0 1.4em;
  max-width: 38em;
  color: var(--ink);
}

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

@media (min-width: 960px) {
  .page-about .mission-chapter__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
    gap: 64px;
  }
}

/* 章节配图 */
.page-about .mission-chapter__figure {
  margin: 0;
  position: relative;
  isolation: isolate;
}

.page-about .mission-chapter__figure::before {
  content: "";
  position: absolute;
  inset: -28px;
  background: radial-gradient(circle at 50% 42%, rgba(255, 179, 0, 0.32), rgba(255, 111, 97, 0.12) 42%, transparent 72%);
  filter: blur(24px);
  z-index: -1;
  pointer-events: none;
}

.page-about .mission-chapter__figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--rule-strong);
}

/* ---------- 版本时间线 ---------- */
.page-about .version-line {
  list-style: none;
  margin: 52px 0 0;
  padding: 0 0 0 30px;
  position: relative;
  display: grid;
  gap: 40px;
}

.page-about .version-line::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: var(--rule-strong);
}

.page-about .version-line__item {
  position: relative;
}

.page-about .version-line__item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 5px;
  width: 13px;
  height: 13px;
  background: var(--card);
  border: 2px solid var(--ink);
  transform: rotate(45deg);
}

.page-about .version-line__item--now::before {
  background: var(--coral);
  border-color: var(--coral-deep);
  box-shadow: 0 0 0 5px rgba(255, 111, 97, 0.18);
}

.page-about .version-line__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 14px;
  margin: 0 0 10px;
}

.page-about .version-line__year {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--ink);
}

.page-about .version-line__ver {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--amber-deep);
}

.page-about .version-line__title {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.4;
  margin: 0 0 8px;
}

.page-about .version-line__text {
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
  margin: 0;
  max-width: 52ch;
}

@media (min-width: 900px) {
  .page-about .version-line {
    padding-left: 44px;
    gap: 46px;
  }
  .page-about .version-line::before {
    left: 14px;
  }
  .page-about .version-line__item::before {
    left: -44px;
    top: 6px;
  }
  .page-about .version-line__year {
    font-size: 22px;
  }
}

/* 横向配图 */
.page-about .mission-wide-figure {
  margin: clamp(56px, 9vw, 96px) 0 0;
  position: relative;
}

.page-about .mission-wide-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--rule-strong);
}

.page-about .mission-wide-figure figcaption {
  font-family: var(--font-serif);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--grey);
  margin-top: 14px;
  padding-left: 2px;
}

/* ---------- 团队岗位 ---------- */
.page-about .team-roles {
  list-style: none;
  padding: 0;
  margin: 44px 0 0;
  display: grid;
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}

.page-about .team-role {
  background: var(--card);
  padding: 30px 22px 34px;
  position: relative;
  min-height: 196px;
}

.page-about .team-role__name {
  font-size: 21px;
  font-weight: 800;
  letter-spacing: -0.015em;
  margin: 0 0 14px;
}

.page-about .team-role__desc {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
  margin: 0;
  max-width: 30ch;
}

.page-about .team-role__num {
  position: absolute;
  right: 16px;
  bottom: 8px;
  font-family: var(--font-mono);
  font-size: 40px;
  font-weight: 700;
  line-height: 1;
  color: var(--amber);
  opacity: 0.7;
  pointer-events: none;
}

@media (min-width: 660px) {
  .page-about .team-roles {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1100px) {
  .page-about .team-roles {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ---------- 四季 ---------- */
.page-about .seasons {
  list-style: none;
  padding: 0;
  margin: 48px 0 0;
  display: grid;
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}

.page-about .season {
  background: var(--card);
  padding: 34px 24px 38px;
  display: flex;
  flex-direction: column;
}

.page-about .season__mark {
  font-family: var(--font-serif);
  font-size: 56px;
  font-weight: 700;
  line-height: 1;
  color: var(--amber);
  margin-bottom: 18px;
}

.page-about .season__name {
  font-size: 17px;
  font-weight: 800;
  line-height: 1.4;
  letter-spacing: -0.01em;
  margin: 0 0 14px;
}

.page-about .season__text {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
  margin: 0;
}

.page-about .season--summer .season__mark {
  color: var(--coral);
}

.page-about .season--autumn .season__mark {
  color: var(--amber-deep);
}

.page-about .season--winter .season__mark {
  color: var(--navy);
}

@media (min-width: 620px) {
  .page-about .seasons {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1060px) {
  .page-about .seasons {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ---------- 深空蓝反白章节 ---------- */
.page-about .mission-dark {
  background: var(--navy);
  color: var(--mist);
  padding: clamp(56px, 9vw, 112px) clamp(24px, 5vw, 64px);
  margin: clamp(48px, 10vw, 120px) 0;
  position: relative;
}

.page-about .mission-dark__num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--ch-num);
  font-weight: 700;
  line-height: 0.85;
  letter-spacing: -0.055em;
  color: var(--amber);
  margin: 0 0 18px;
  user-select: none;
}

.page-about .mission-dark__kicker {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: rgba(230, 236, 245, 0.6);
  margin: 0 0 16px;
}

.page-about .mission-dark__title {
  font-size: clamp(26px, 4vw, 42px);
  font-weight: 900;
  letter-spacing: -0.025em;
  line-height: 1.18;
  color: var(--mist);
  margin: 0 0 26px;
  max-width: 18ch;
}

.page-about .mission-dark__lead {
  font-size: 17px;
  line-height: 1.9;
  color: rgba(230, 236, 245, 0.86);
  max-width: 38em;
  margin: 0;
}

.page-about .mission-dark__tail {
  font-size: 15.5px;
  line-height: 1.9;
  color: rgba(230, 236, 245, 0.72);
  max-width: 38em;
  margin: 36px 0 0;
  padding-left: 18px;
  border-left: 4px solid var(--amber);
}

.page-about .partner-stats {
  list-style: none;
  margin: 40px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: rgba(230, 236, 245, 0.18);
  border: 1px solid rgba(230, 236, 245, 0.18);
}

.page-about .partner-stats li {
  background: var(--navy);
  padding: 22px 20px 24px;
  font-size: 13px;
  line-height: 1.5;
  color: rgba(230, 236, 245, 0.72);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .partner-stats li span {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.2vw, 32px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--amber);
}

@media (min-width: 820px) {
  .page-about .partner-stats {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ---------- 下一阶段 ---------- */
.page-about .next-list {
  list-style: none;
  padding: 0;
  margin: 44px 0 48px;
  display: grid;
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}

.page-about .next-list > li {
  background: var(--card);
  padding: 30px 24px 34px;
}

.page-about .next-list__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--coral-deep);
  padding-bottom: 5px;
  border-bottom: 1px solid var(--coral);
  margin-bottom: 16px;
}

.page-about .next-list h3 {
  font-size: 18px;
  font-weight: 800;
  line-height: 1.4;
  letter-spacing: -0.01em;
  margin: 0 0 14px;
}

.page-about .next-list p {
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-soft);
  margin: 0;
}

@media (min-width: 860px) {
  .page-about .next-list {
    grid-template-columns: repeat(3, 1fr);
  }
}

.page-about .entry-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}
</main>