/* ===== 品牌档案 / about ===== */
.page-about {
  --about-axis: 96px;
  --about-paper-ink: #0B211D;
}

.page-about .breadcrumb {
  padding-top: 22px;
  padding-bottom: 4px;
  font-size: 13px;
  color: var(--muted);
}

.page-about .breadcrumb a {
  color: var(--blue-soft);
  text-decoration: none;
}

.page-about .breadcrumb a:hover {
  color: var(--whistle);
}

.page-about .breadcrumb span {
  margin-left: 8px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: 36px 0 52px;
  position: relative;
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--line-yellow);
}

.page-about .about-hero__grid {
  display: grid;
  gap: 34px;
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(34px, 8.2vw, 78px);
  line-height: 1.04;
  letter-spacing: -0.012em;
  color: var(--white);
}

.page-about .about-hero__lede {
  margin-top: 20px;
  max-width: 60ch;
  color: var(--blue-soft);
}

.page-about .about-figures {
  display: grid;
  gap: 18px;
  border-top: 1px solid var(--line);
  padding-top: 22px;
}

.page-about .about-figures__item {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  align-items: baseline;
  gap: 14px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 14px;
}

.page-about .about-figures__item:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-figures__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(26px, 5vw, 38px);
  line-height: 1.05;
  color: var(--whistle);
}

.page-about .about-figures__label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 发展历程 ---------- */
.page-about .about-history {
  padding-top: 56px;
}

.page-about .about-history__media {
  margin: 30px 0 8px;
}

.page-about .tl {
  position: relative;
  margin-top: 26px;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  top: 6px;
  bottom: 26px;
  left: 7px;
  width: 1px;
  background: var(--line);
}

.page-about .tl__item {
  position: relative;
  padding: 26px 0 26px 38px;
  scroll-margin-top: 150px;
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: 1px;
  top: 36px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--night);
  border: 2px solid var(--whistle);
}

.page-about .tl__stamp {
  display: inline-block;
  text-decoration: none;
}

.page-about .tl__year {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(28px, 8vw, 44px);
  line-height: 1.05;
  letter-spacing: 0.01em;
  color: var(--white);
  border-bottom: 2px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .tl__stamp:hover .tl__year,
.page-about .tl__stamp:focus-visible .tl__year {
  color: var(--whistle);
  border-bottom-color: var(--whistle);
}

.page-about .tl__title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(19px, 3.4vw, 24px);
  line-height: 1.3;
  color: var(--white);
}

.page-about .tl__text {
  margin: 0;
  max-width: 62ch;
  color: #CFE0DA;
}

.page-about .tl__note {
  margin: 12px 0 0;
  padding-left: 12px;
  border-left: 2px solid var(--line-yellow);
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  background: var(--stand);
  background-image: var(--tex);
  margin-top: 26px;
  padding: 54px 0 58px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-team__grid {
  display: grid;
  gap: 32px;
  margin-top: 30px;
}

.page-about .about-roles {
  display: grid;
  gap: 20px;
}

.page-about .about-role {
  border: 1px solid var(--line);
  padding: 18px 18px 20px;
  outline: none;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .about-role:hover,
.page-about .about-role:focus-visible {
  border-color: var(--line-yellow);
  background: var(--turf);
}

.page-about .about-role__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
}

.page-about .about-role__name {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 18px;
  letter-spacing: 0.02em;
  color: var(--white);
}

.page-about .about-role__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 30px;
  line-height: 1;
  color: var(--whistle);
}

.page-about .about-role__track {
  position: relative;
  height: 6px;
  margin-top: 14px;
  background: rgba(255, 255, 255, 0.08);
  overflow: hidden;
}

.page-about .about-role__fill {
  display: block;
  height: 100%;
  background: var(--whistle);
  transition: width 0.4s var(--ease);
}

.page-about .about-role--a .about-role__fill { width: 35.3%; }
.page-about .about-role--b .about-role__fill { width: 23.5%; background: var(--blue); }
.page-about .about-role--c .about-role__fill { width: 26.5%; background: var(--blue-soft); }
.page-about .about-role--d .about-role__fill { width: 14.7%; background: var(--alert); }

.page-about .about-role__note {
  margin: 12px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .about-team__side {
  border-top: 1px solid var(--line-yellow);
  padding-top: 22px;
}

.page-about .about-quote {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(19px, 3.6vw, 23px);
  line-height: 1.55;
  color: var(--white);
}

.page-about .about-team__side-note {
  margin: 18px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 复核流程（浅色） ---------- */
.page-about .section--paper {
  background: var(--paper);
  color: var(--about-paper-ink);
}

.page-about .about-check {
  padding: 54px 0 58px;
}

.page-about .about-check .eyebrow {
  color: var(--whistle-ink);
}

.page-about .about-check .section-title {
  color: var(--about-paper-ink);
}

.page-about .about-check .lede {
  color: #4A5A55;
}

.page-about .about-check__grid {
  display: grid;
  gap: 30px;
}

.page-about .about-check__media {
  margin: 0;
}

.page-about .about-steps {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
}

.page-about .about-steps__item {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 14px;
  padding: 22px 0;
  border-top: 1px solid var(--rule);
}

.page-about .about-steps__item:last-child {
  border-bottom: 1px solid var(--rule);
}

.page-about .about-steps__no {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 15px;
  line-height: 1.9;
  color: var(--whistle-ink);
}

.page-about .about-steps__title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 19px;
  color: var(--about-paper-ink);
}

.page-about .about-steps__text {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.75;
  color: #3C4C47;
}

/* ---------- 覆盖范围 ---------- */
.page-about .about-coverage {
  padding-top: 56px;
}

.page-about .codes {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 6px;
  margin-top: 26px;
}

.page-about .codes__cell {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 9px 0;
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 12.5px;
  color: var(--muted);
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-about .codes__cell:nth-child(8n+1) {
  color: var(--whistle);
  border-color: var(--line-yellow);
}

.page-about .about-coverage__grid {
  display: grid;
  gap: 26px;
  margin-top: 34px;
}

.page-about .about-coverage__sub {
  margin: 0 0 14px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 15px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--blue-soft);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

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

.page-about .about-tags li {
  font-size: 13.5px;
  line-height: 1.5;
  padding: 7px 12px;
  border: 1px solid var(--line-yellow);
  color: var(--white);
}

.page-about .about-tags--soft li {
  border-color: var(--line);
  color: #CFE0DA;
}

.page-about .about-coverage__media {
  margin: 34px 0 0;
}

/* ---------- 数据来源 ---------- */
.page-about .about-source {
  padding: 54px 0 58px;
  border-top: 1px solid var(--line);
}

.page-about .about-source__grid {
  display: grid;
  gap: 30px;
}

.page-about .about-facts {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
}

.page-about .about-facts li {
  display: grid;
  grid-template-columns: 108px minmax(0, 1fr);
  gap: 16px;
  align-items: baseline;
  padding: 16px 0;
  border-top: 1px solid var(--line);
}

.page-about .about-facts li:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .about-facts__k {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 14px;
  color: var(--whistle);
}

.page-about .about-facts__v {
  font-size: 14.5px;
  line-height: 1.7;
  color: #CFE0DA;
}

.page-about .about-source__panel {
  background: var(--stand);
  border: 1px solid var(--line-yellow);
  padding: 24px 22px 26px;
}

.page-about .about-source__panel-title {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 20px;
  line-height: 1.35;
  color: var(--white);
}

.page-about .about-source__panel-text {
  margin: 0 0 20px;
  font-size: 14.5px;
  line-height: 1.75;
  color: #CFE0DA;
}

/* ---------- 读者节奏（浅色） ---------- */
.page-about .about-scale {
  padding: 54px 0 30px;
}

.page-about .about-scale .eyebrow {
  color: var(--whistle-ink);
}

.page-about .about-scale .section-title {
  color: var(--about-paper-ink);
}

.page-about .about-scale .lede {
  color: #4A5A55;
}

.page-about .about-scale__grid {
  display: grid;
  gap: 28px;
}

.page-about .about-scale__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}

.page-about .about-metric {
  background: var(--paper);
  padding: 22px 18px;
  display: grid;
  gap: 8px;
}

.page-about .about-metric__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(30px, 5.4vw, 42px);
  line-height: 1.05;
  color: var(--about-paper-ink);
}

.page-about .about-metric__unit {
  font-size: 0.46em;
  margin-left: 4px;
  color: var(--whistle-ink);
}

.page-about .about-metric__label {
  font-size: 13px;
  line-height: 1.6;
  color: #5A6A64;
}

.page-about .about-scale__foot {
  margin: 30px 0 0;
  max-width: 78ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: #3C4C47;
  padding-left: 14px;
  border-left: 3px solid var(--whistle-ink);
}

/* ---------- 结尾 CTA ---------- */
.page-about .about-cta {
  padding: 12px 0 68px;
}

.page-about .about-cta__line {
  margin: 0 0 24px;
  max-width: 34ch;
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(21px, 4.4vw, 30px);
  line-height: 1.5;
  color: var(--about-paper-ink);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-figures__item {
    grid-template-columns: 118px minmax(0, 1fr);
  }

  .page-about .codes {
    grid-template-columns: repeat(7, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about {
    --about-axis: 132px;
  }

  .page-about .about-hero {
    padding: 56px 0 64px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
    gap: 56px;
  }

  .page-about .about-history {
    padding-top: 72px;
  }

  .page-about .tl::before {
    left: var(--about-axis);
  }

  .page-about .tl__item {
    display: grid;
    grid-template-columns: var(--about-axis) minmax(0, 1fr);
    padding: 30px 0;
  }

  .page-about .tl__item::before {
    left: calc(var(--about-axis) - 6px);
    top: 42px;
  }

  .page-about .tl__stamp {
    padding-right: 34px;
    text-align: right;
  }

  .page-about .tl__panel {
    padding-left: 34px;
    padding-right: 6%;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 8fr) minmax(0, 3fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .about-roles {
    gap: 16px;
  }

  .page-about .about-team__side {
    padding-top: 26px;
    position: sticky;
    top: 130px;
  }

  .page-about .about-check__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .about-coverage__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 40px;
  }

  .page-about .about-source__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-scale__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 48px;
    align-items: end;
  }
}

@media (min-width: 1100px) {
  .page-about .codes {
    grid-template-columns: repeat(14, minmax(0, 1fr));
  }

  .page-about .about-history__media {
    max-width: 68%;
    margin-left: 0;
  }
}

@media (hover: hover) and (min-width: 768px) {
  .page-about .about-role__note {
    max-height: 0;
    margin-top: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height 0.3s var(--ease), opacity 0.24s var(--ease), margin-top 0.3s var(--ease);
  }

  .page-about .about-role:hover .about-role__note,
  .page-about .about-role:focus-visible .about-role__note {
    max-height: 120px;
    margin-top: 12px;
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-role__fill,
  .page-about .tl__year,
  .page-about .about-role,
  .page-about .codes__cell {
    transition: none;
  }
}