/* =========================================================
   页面：品牌历程 /history/
   作用域：.page-about
   ========================================================= */

.page-about {
  --about-card: #FFFBF1;
  --about-print-shadow: 6px 6px 0 rgba(31, 23, 18, 0.13);
  --about-grid: rgba(159, 192, 255, 0.07);
  background: var(--cream);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-top: 20px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-about .about-crumb a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-crumb a:hover,
.page-about .about-crumb a:focus-visible {
  color: #ffffff;
  border-bottom-color: currentColor;
}

.page-about .about-crumb span:last-child {
  color: var(--gold);
}

/* ---------- 页头 ---------- */
.page-about .about-head {
  background:
    repeating-linear-gradient(90deg, var(--about-grid) 0 1px, transparent 1px 62px),
    repeating-linear-gradient(0deg, var(--about-grid) 0 1px, transparent 1px 62px),
    linear-gradient(158deg, var(--deep) 0%, var(--deep-soft) 100%);
  border-bottom: 4px solid var(--gold);
  padding-bottom: 66px;
  color: var(--cream);
}

.page-about .about-head__grid {
  display: grid;
  gap: 28px;
  padding-top: 22px;
}

.page-about .about-eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--gold);
}

.page-about .about-head h1 {
  margin: 0 0 18px;
  font-size: clamp(27px, 6.2vw, 50px);
  line-height: 1.16;
  font-weight: 900;
  letter-spacing: 0.045em;
  color: #ffffff;
}

.page-about .about-head__lead {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.86;
  color: var(--mist);
}

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

.page-about .about-stamp > div {
  background: rgba(10, 26, 51, 0.74);
  padding: 14px 16px;
}

.page-about .about-stamp dt {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--mist);
  opacity: 0.86;
}

.page-about .about-stamp dd {
  margin: 7px 0 0;
  font-family: var(--font-mono);
  font-size: 23px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--gold);
}

/* ---------- 档案速览条 ---------- */
.page-about .about-ticker {
  position: relative;
  z-index: 2;
  margin: -32px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--rule-strong);
  border: 1px solid var(--rule-strong);
  box-shadow: var(--about-print-shadow);
}

.page-about .about-ticker li {
  background: var(--about-card);
  padding: 15px 16px;
}

.page-about .about-ticker__k {
  display: block;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--slate);
}

.page-about .about-ticker__v {
  display: block;
  margin-top: 7px;
  font-family: var(--font-mono);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--deep);
}

/* ---------- 通用章节 ---------- */
.page-about .about-section {
  position: relative;
  padding: 50px 0;
}

.page-about .about-section--paper {
  background:
    repeating-linear-gradient(0deg, rgba(31, 23, 18, 0.03) 0 1px, transparent 1px 24px),
    var(--paper);
  border-top: 1px solid var(--rule-strong);
  border-bottom: 1px solid var(--rule-strong);
}

.page-about .about-section--deep {
  background:
    radial-gradient(circle at 14% 12%, rgba(43, 109, 246, 0.24), transparent 48%),
    repeating-linear-gradient(90deg, var(--about-grid) 0 1px, transparent 1px 58px),
    linear-gradient(200deg, var(--deep) 0%, #08152A 100%);
  border-top: 4px solid var(--electric);
  border-bottom: 4px solid var(--electric);
  color: var(--cream);
}

/* ---------- 章节标题 ---------- */
.page-about .about-h {
  display: block;
  margin: 0 0 28px;
}

.page-about .about-h .section-head__num {
  display: inline-block;
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--ember);
}

.page-about .about-h__title {
  margin: 0;
  font-size: clamp(21px, 3.4vw, 29px);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: 0.04em;
  color: var(--ink);
}

.page-about .about-h__sub {
  margin: 12px 0 0;
  max-width: 64ch;
  font-size: 14px;
  line-height: 1.82;
  color: var(--slate);
}

.page-about .about-section--deep .about-h .section-head__num {
  color: var(--gold);
}

.page-about .about-section--deep .about-h__title {
  color: #ffffff;
}

.page-about .about-section--deep .about-h__sub {
  color: var(--mist);
}

/* ---------- 通用图片框 ---------- */
.page-about .about-figure {
  margin: 0;
  padding: 10px;
  background: var(--about-card);
  border: 1px solid var(--rule-strong);
  box-shadow: var(--about-print-shadow);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: var(--paper);
}

.page-about .about-figure figcaption {
  padding: 10px 2px 2px;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.65;
  letter-spacing: 0.04em;
  color: var(--slate);
}

.page-about .about-figure--wide img {
  aspect-ratio: 14 / 9;
}

.page-about .about-figure--square img {
  aspect-ratio: 1 / 1;
}

.page-about .about-section--deep .about-figure {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--rail-line);
  box-shadow: 10px 10px 0 rgba(0, 0, 0, 0.3);
}

.page-about .about-section--deep .about-figure figcaption {
  color: var(--mist);
}

/* ---------- 起点章节 ---------- */
.page-about .founding {
  display: grid;
  gap: 26px;
}

.page-about .founding__figure {
  transform: rotate(-1.1deg);
}

.page-about .founding__text p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.86;
  color: var(--ink);
}

.page-about .founding__key {
  list-style: none;
  margin: 24px 0 0;
  padding: 1px;
  display: grid;
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}

.page-about .founding__key li {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 12px;
  align-items: baseline;
  background: var(--about-card);
  padding: 13px 16px;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--ink);
}

.page-about .founding__key span {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ember);
}

/* ---------- 年份索引 ---------- */
.page-about .year-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 26px;
}

.page-about .year-nav a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 14px;
  background: var(--about-card);
  border: 1px solid var(--rule-strong);
  color: var(--ink);
  font-size: 13px;
  text-decoration: none;
  transition: background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .year-nav a .num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--ember);
}

.page-about .year-nav a:hover,
.page-about .year-nav a:focus-visible {
  background: var(--deep);
  border-color: var(--deep);
  color: var(--cream);
}

.page-about .year-nav a:hover .num,
.page-about .year-nav a:focus-visible .num {
  color: var(--gold);
}

/* ---------- 版本时间线 ---------- */
.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-about .timeline__item {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
}

.page-about .timeline__year {
  padding-top: 14px;
  border-top: 3px solid var(--ember);
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--deep);
}

.page-about .timeline__card {
  background: var(--about-card);
  border: 1px solid var(--rule-strong);
  border-left: 4px solid var(--gold);
  box-shadow: var(--about-print-shadow);
  padding: 18px 18px 20px;
}

.page-about .timeline__tag {
  display: inline-block;
  margin-bottom: 10px;
  padding: 3px 8px;
  background: var(--gold);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
}

.page-about .timeline__title {
  margin: 0 0 8px;
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.03em;
  color: var(--deep);
}

.page-about .timeline__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.82;
  color: var(--ink);
}

/* ---------- 等宽字体说明区 ---------- */
.page-about .width-note {
  display: grid;
  gap: 22px;
  margin-top: 48px;
  align-items: center;
}

.page-about .width-note__text h3 {
  margin: 0 0 12px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--deep);
}

.page-about .width-note__text p {
  margin: 0 0 14px;
  font-size: 14.5px;
  line-height: 1.86;
  color: var(--ink);
}

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

/* ---------- 口径六条 ---------- */
.page-about .rules {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .rules__item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 14px;
  padding: 22px 0;
  border-top: 1px solid var(--rule-strong);
}

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

.page-about .rules__num {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--deep);
}

.page-about .rules__title {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--deep);
}

.page-about .rules__text > p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.84;
  color: var(--ink);
}

.page-about .rules__text .expander {
  margin-top: 14px;
}

/* ---------- 协作章节 ---------- */
.page-about .crew {
  display: grid;
  gap: 24px;
}

.page-about .crew__text p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.88;
  color: var(--mist);
}

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

.page-about .roles {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .roles__item {
  padding: 20px 18px 22px;
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid var(--rail-line);
}

.page-about .roles__num {
  display: block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--gold);
}

.page-about .roles__item h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: #ffffff;
}

.page-about .roles__item p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 更新节点表 ---------- */
.page-about .table-wrap {
  margin-top: 34px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-section--deep .datatable {
  width: 100%;
  min-width: 540px;
  border-collapse: collapse;
  color: var(--cream);
}

.page-about .about-section--deep .datatable caption {
  caption-side: top;
  text-align: left;
  padding: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-about .about-section--deep .datatable thead th {
  padding: 11px 14px;
  text-align: left;
  white-space: nowrap;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--mist);
  border-bottom: 1px solid var(--rail-line);
}

.page-about .about-section--deep .datatable tbody td {
  padding: 13px 14px;
  font-size: 13.5px;
  line-height: 1.68;
  color: var(--cream);
  border-bottom: 1px solid rgba(159, 192, 255, 0.12);
}

.page-about .about-section--deep .datatable tbody td.num {
  font-family: var(--font-mono);
  font-weight: 700;
  white-space: nowrap;
  color: var(--gold);
}

.page-about .about-section--deep .datatable tbody tr:hover {
  background: rgba(43, 109, 246, 0.14);
}

/* ---------- 合规说明 ---------- */
.page-about .statement {
  padding: 24px 20px 26px;
  background: var(--about-card);
  border: 1px solid var(--rule-strong);
  box-shadow: var(--about-print-shadow);
}

.page-about .statement > p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.88;
  color: var(--ink);
}

.page-about .statement__meta,
.page-about .statement__contact {
  margin: 24px 0 0;
  padding: 1px;
  display: grid;
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}

.page-about .statement__meta > div,
.page-about .statement__contact > div {
  background: var(--cream);
  padding: 14px 16px;
}

.page-about .statement__meta dt,
.page-about .statement__contact dt {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--slate);
}

.page-about .statement__meta dd,
.page-about .statement__contact dd {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.62;
  color: var(--ink);
  word-break: break-word;
}

.page-about .statement__meta dd.num,
.page-about .statement__contact dd.num {
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--deep);
}

.page-about .statement__note {
  margin: 18px 0 0;
  font-size: 13px;
  line-height: 1.82;
  color: var(--slate);
}

.page-about .statement__links {
  margin-top: 26px;
  padding-top: 20px;
  border-top: 1px solid var(--rule);
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .statement__links a {
  padding: 9px 14px;
  background: var(--cream);
  border: 1px solid var(--rule-strong);
  color: var(--deep);
  font-size: 13px;
  text-decoration: none;
  transition: background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .statement__links a:hover,
.page-about .statement__links a:focus-visible {
  background: var(--electric);
  border-color: var(--electric);
  color: #ffffff;
}

/* =========================================================
   响应式
   ========================================================= */

@media (min-width: 768px) {
  .page-about .about-head__lead {
    font-size: 16px;
  }

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

  .page-about .rules__item {
    grid-template-columns: 78px minmax(0, 1fr);
    gap: 26px;
    padding: 26px 0;
  }

  .page-about .statement {
    padding: 34px 36px 38px;
  }

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

  .page-about .roles {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (min-width: 900px) {
  .page-about .about-head {
    padding-bottom: 82px;
  }

  .page-about .about-head__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 0.85fr);
    gap: 48px;
    align-items: end;
    padding-top: 34px;
  }

  .page-about .about-section {
    padding: 82px 0;
  }

  .page-about .founding {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .width-note {
    grid-template-columns: minmax(0, 320px) minmax(0, 1fr);
    gap: 44px;
    margin-top: 76px;
  }

  .page-about .crew {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
    gap: 44px;
    align-items: center;
  }
}

@media (min-width: 960px) {
  .page-about .timeline {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px 24px;
  }

  .page-about .timeline__item:nth-child(even) {
    margin-top: 30px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .founding__figure {
    transform: none;
  }

  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}