/* ============================================================
   品牌中心 / 赛区归档方法与名单校对流程
   作用域：.page-about
   ============================================================ */

.page-about {
  --about-line-x: 9px;
  --about-line-x-lg: 100px;
  --about-dot: 18px;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  padding-top: clamp(18px, 3vw, 34px);
  padding-bottom: clamp(28px, 4.5vw, 60px);
}

.page-about .about-hero .crumbs {
  margin-bottom: clamp(22px, 4vw, 44px);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
  align-items: center;
}

.page-about .about-hero__kicker {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-hero h1 {
  margin: 0 0 18px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(30px, 6.6vw, 60px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--text);
  max-width: 15em;
}

.page-about .about-hero__lede {
  margin: 0 0 24px;
  max-width: 36em;
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 14px;
  color: var(--muted);
}

.page-about .about-hero__facts li {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
}

.page-about .about-hero__facts .num {
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--cyan);
}

/* ---------- 首屏赛区矩阵视觉 ---------- */

.page-about .zone-matrix {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  padding: 12px;
  background:
    radial-gradient(120% 90% at 100% 0%, rgba(53, 224, 212, 0.09), transparent 60%),
    linear-gradient(160deg, var(--panel), var(--ink) 72%);
  border: 1px solid var(--line);
  border-radius: var(--radius-l);
}

.page-about .zone-matrix__cell {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 22px;
  min-height: 96px;
  padding: 16px 14px 14px 18px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-m);
  background: rgba(11, 18, 32, 0.62);
  overflow: hidden;
}

.page-about .zone-matrix__cell::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: var(--zone, var(--cyan));
}

.page-about .zone-matrix__cell--east { --zone: var(--cyan); }
.page-about .zone-matrix__cell--south { --zone: var(--orange); }
.page-about .zone-matrix__cell--north { --zone: var(--violet); }
.page-about .zone-matrix__cell--west { --zone: var(--moss); }

.page-about .zone-matrix__code {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--dim);
}

.page-about .zone-matrix__name {
  font-family: var(--font-head);
  font-size: clamp(17px, 2vw, 21px);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
}

/* ---------- 开篇横幅 ---------- */

.page-about .about-banner {
  margin: 0 0 clamp(30px, 5vw, 64px);
}

.page-about .about-banner .figure__frame {
  border-radius: 0;
}

.page-about .about-banner .figure__cap {
  width: var(--shell);
  margin-inline: auto;
}

/* ---------- 主区骨架 ---------- */

.page-about .about-body {
  padding-bottom: clamp(50px, 8vw, 100px);
}

.page-about .about-flow {
  display: grid;
  gap: clamp(52px, 8vw, 104px);
}

.page-about .about-block {
  min-width: 0;
}

.page-about .about-block--narrow {
  max-width: 52rem;
}

/* ---------- 左侧常驻索引 ---------- */

.page-about .about-rail {
  min-width: 0;
}

.page-about .about-rail .rail-card + .rail-card {
  margin-top: 14px;
}

.page-about .rail-legend {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .rail-legend__item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--muted);
}

.page-about .rail-legend__dot {
  flex: none;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--zone, var(--cyan));
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.03);
}

.page-about .rail-legend__dot--east { --zone: var(--cyan); }
.page-about .rail-legend__dot--south { --zone: var(--orange); }
.page-about .rail-legend__dot--north { --zone: var(--violet); }
.page-about .rail-legend__dot--west { --zone: var(--moss); }

.page-about .rail-card__big {
  margin: 6px 0 8px;
  font-family: var(--font-head);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-about .rail-card__note {
  margin: 0 0 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--dim);
}

.page-about .rail-card__link {
  font-size: 13px;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 224, 212, 0.35);
  padding-bottom: 1px;
}

.page-about .rail-card__link:hover,
.page-about .rail-card__link:focus-visible {
  color: var(--text);
  border-bottom-color: var(--orange);
}

/* ---------- 编号章节头微调 ---------- */

.page-about .sec-head {
  margin-bottom: clamp(22px, 3.5vw, 38px);
}

.page-about .sec-head__desc {
  max-width: 44ch;
}

/* ---------- 01 档案清单 ---------- */

.page-about .archive-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .archive-list__row {
  display: grid;
  gap: 8px;
  padding: 22px 0 22px 18px;
  border-top: 1px solid var(--line-soft);
  border-left: 3px solid transparent;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

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

.page-about .archive-list__row:hover {
  border-left-color: var(--cyan);
  background: linear-gradient(90deg, rgba(53, 224, 212, 0.06), transparent 60%);
}

.page-about .archive-list__key {
  font-family: var(--font-head);
  font-size: clamp(18px, 2.4vw, 24px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-about .archive-list__val {
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .archive-list__val .num {
  font-family: var(--font-mono);
  color: var(--cyan);
}

/* ---------- 02 赛区分段切换 ---------- */

.page-about .zone-tabs {
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-l);
  padding: clamp(16px, 2.5vw, 26px);
  background:
    radial-gradient(90% 120% at 0% 0%, rgba(124, 107, 232, 0.08), transparent 55%),
    var(--panel);
}

.page-about .zone-tabs__bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.page-about .zone-tabs .seg__btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--muted);
  background: rgba(11, 18, 32, 0.6);
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  cursor: pointer;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .zone-tabs .seg__btn::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--zone, var(--muted));
}

.page-about .zone-tabs .seg__btn--east { --zone: var(--cyan); }
.page-about .zone-tabs .seg__btn--south { --zone: var(--orange); }
.page-about .zone-tabs .seg__btn--north { --zone: var(--violet); }
.page-about .zone-tabs .seg__btn--west { --zone: var(--moss); }

.page-about .zone-tabs .seg__btn:hover {
  color: var(--text);
  border-color: var(--line);
}

.page-about .zone-tabs .seg__btn[aria-selected="true"] {
  color: var(--text);
  border-color: var(--zone, var(--cyan));
  background: linear-gradient(180deg, rgba(53, 224, 212, 0.14), rgba(53, 224, 212, 0.03));
}

.page-about .zone-tabs .seg__btn:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-about .zone-tabs .seg-panel {
  border-top: 1px solid var(--line-soft);
  padding-top: 20px;
}

.page-about .zone-panel__lede {
  margin: 0 0 12px;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
}

.page-about .zone-panel__meta {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
  padding-left: 14px;
  border-left: 2px solid var(--line);
}

/* ---------- 03 校对流程 ---------- */

.page-about .about-duo {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.5vw, 42px);
  align-items: center;
}

.page-about .about-duo + .table-scroll,
.page-about .stat-row + .about-duo {
  margin-top: clamp(30px, 4.5vw, 54px);
}

.page-about .about-duo .figure {
  margin: 0;
}

.page-about .steps {
  counter-reset: step;
  display: grid;
  gap: 20px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .steps__item {
  position: relative;
  padding-left: 46px;
}

.page-about .steps__item::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  padding: 2px 6px;
  border: 1px solid var(--line);
  border-radius: var(--radius-s);
  background: rgba(53, 224, 212, 0.06);
}

.page-about .steps__title {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-size: clamp(17px, 2vw, 20px);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-about .steps__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

.page-about .steps__desc .num {
  font-family: var(--font-mono);
  color: var(--cyan);
}

.page-about .proof-table {
  width: 100%;
}

.page-about .proof-table__cap {
  caption-side: top;
  text-align: left;
  padding: 0 0 12px;
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 600;
  color: var(--muted);
}

.page-about .proof-table th[scope="row"] {
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
}

/* ---------- 04 版本数据行 ---------- */

.page-about .stat-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-m);
  overflow: hidden;
}

.page-about .stat-cell {
  padding: 22px 20px;
  background: var(--panel);
}

.page-about .stat-cell__k {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--dim);
}

.page-about .stat-cell__v {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-about .stat-cell__v .num {
  font-family: var(--font-mono);
  color: var(--cyan);
}

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

.page-about .about-duo__text p {
  margin: 0 0 16px;
  max-width: 42ch;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--muted);
}

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

.page-about .about-duo__text .num {
  font-family: var(--font-mono);
  color: var(--cyan);
}

/* ---------- 05 时间线 ---------- */

.page-about .timeline {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: clamp(22px, 3vw, 34px);
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: var(--about-line-x);
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--line) 55%, transparent 100%);
}

.page-about .timeline__item {
  position: relative;
  padding-left: 42px;
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: calc(var(--about-line-x) - var(--about-dot) / 2);
  top: 6px;
  width: var(--about-dot);
  height: var(--about-dot);
  border-radius: 50%;
  background: var(--ink);
  border: 3px solid var(--dot, var(--cyan));
}

.page-about .timeline__item--east { --dot: var(--cyan); }
.page-about .timeline__item--south { --dot: var(--orange); }
.page-about .timeline__item--north { --dot: var(--violet); }
.page-about .timeline__item--west { --dot: var(--moss); }

.page-about .timeline__year {
  display: block;
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.04em;
  color: var(--muted);
  margin-bottom: 4px;
}

.page-about .timeline__title {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-size: clamp(17px, 2.2vw, 21px);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-about .timeline__body p {
  margin: 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 06 协作网络 ---------- */

.page-about .partner-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .partner-card {
  position: relative;
  padding: 22px 20px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-m);
  background: linear-gradient(155deg, var(--panel), rgba(11, 18, 32, 0.7));
  overflow: hidden;
}

.page-about .partner-card::after {
  content: "";
  position: absolute;
  right: -30px;
  bottom: -40px;
  width: 120px;
  height: 120px;
  border-radius: 46% 54% 62% 38% / 48% 42% 58% 52%;
  background: rgba(53, 224, 212, 0.07);
}

.page-about .partner-card__num {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: clamp(30px, 5vw, 44px);
  font-weight: 500;
  line-height: 1;
  color: var(--cyan);
}

.page-about .partner-card__title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-about .partner-card__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-cta {
  display: grid;
  gap: 18px;
  margin-top: clamp(26px, 4vw, 44px);
  padding: clamp(22px, 3.4vw, 34px);
  border: 1px solid var(--line);
  border-left: 4px solid var(--orange);
  border-radius: var(--radius-m);
  background: linear-gradient(120deg, rgba(255, 122, 51, 0.1), rgba(19, 30, 51, 0.9) 55%);
}

.page-about .about-cta__title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: clamp(19px, 2.6vw, 26px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-about .about-cta__text p {
  margin: 0;
  max-width: 46ch;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--muted);
}

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

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about .stat-row {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 720px) {
  .page-about .archive-list__row {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 28px;
    align-items: baseline;
    padding-left: 22px;
  }

  .page-about .timeline::before {
    left: var(--about-line-x-lg);
  }

  .page-about .timeline__item {
    display: grid;
    grid-template-columns: 84px minmax(0, 1fr);
    gap: 32px;
    padding-left: 0;
  }

  .page-about .timeline__item::before {
    left: calc(var(--about-line-x-lg) - var(--about-dot) / 2);
    top: 4px;
  }

  .page-about .timeline__year {
    text-align: right;
    margin-bottom: 0;
    padding-top: 2px;
  }
}

@media (min-width: 800px) {
  .page-about .about-duo {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  }

  .page-about .about-duo--flip .about-duo__media {
    order: -1;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
  }

  .page-about .about-rail {
    position: sticky;
    top: 96px;
    align-self: start;
  }

  .page-about .zone-matrix {
    gap: 12px;
    padding: 14px;
  }
}

@media (min-width: 1100px) {
  .page-about .about-hero h1 {
    font-size: clamp(44px, 4.4vw, 60px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .archive-list__row,
  .page-about .zone-tabs .seg__btn {
    transition: none;
  }
}