/* ============ 品牌使命页 · page-about ============ */

.page-about {
  background-color: var(--ink);
  color: var(--paper);
  padding-bottom: clamp(48px, 8vw, 100px);
}

.page-about a {
  color: inherit;
}

.page-about :is(a, summary, button):focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  padding: clamp(18px, 3vw, 30px) 0 clamp(8px, 1.4vw, 14px);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about .breadcrumb a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .breadcrumb a:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-about .breadcrumb > span[aria-hidden="true"] {
  margin: 0 8px;
  color: var(--line);
}

.page-about .breadcrumb > span[aria-current="page"] {
  color: var(--paper);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(20px, 4vw, 44px) 0 clamp(32px, 5vw, 60px);
  border-bottom: 1px solid var(--line);
  background-image:
    linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 56px 56px;
  background-position: 0 0;
}

.page-about .about-hero__inner {
  max-width: 1040px;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.9rem, 4.6vw, 3.4rem);
  line-height: 1.14;
  letter-spacing: -0.01em;
  margin: 14px 0 22px;
  max-width: 20ch;
}

.page-about .about-hero__lede {
  font-size: clamp(1rem, 1.5vw, 1.125rem);
  line-height: 1.9;
  color: var(--paper);
  opacity: 0.92;
  max-width: 46em;
  margin: 0 0 clamp(28px, 4vw, 44px);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background-color: var(--line);
  border: 1px solid var(--line);
  max-width: 780px;
}

.page-about .about-hero__facts li {
  background-color: var(--ink);
  padding: 14px 16px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-hero__facts .num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.3rem, 2.6vw, 1.7rem);
  color: var(--lava);
  line-height: 1;
}

.page-about .about-hero__facts li > span:last-child {
  font-size: 0.8125rem;
  letter-spacing: 0.1em;
  color: var(--mist);
}

/* ---------- 档案骨架 ---------- */
.page-about .archive {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

/* ---------- 左侧竖排刻度 ---------- */
.page-about .archive-rail {
  padding: clamp(20px, 3vw, 28px) 0;
  border-bottom: 1px solid var(--line);
}

.page-about .rail-span {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

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

.page-about .rail-item a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  text-decoration: none;
  color: var(--mist);
  white-space: nowrap;
  font-size: 0.875rem;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .rail-item a:hover {
  color: var(--paper);
  border-color: var(--lava);
  background-color: var(--ink-2);
}

.page-about .rail-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--lava);
}

.page-about .rail-label {
  letter-spacing: 0.06em;
}

/* ---------- 右侧奶油纸长文面板 ---------- */
.page-about .archive-body {
  background-color: var(--paper);
  color: var(--brown);
  padding: clamp(22px, 3.6vw, 52px);
  border-top: 1px solid var(--line-paper);
}

.page-about .archive-body a {
  color: var(--lava-deep);
  text-decoration: none;
  border-bottom: 1px solid var(--lava-deep);
}

.page-about .archive-body a:hover {
  color: var(--brown);
  border-bottom-color: var(--brown);
}

/* ---------- 章节 ---------- */
.page-about .chapter {
  padding: clamp(26px, 3.4vw, 44px) 0;
  border-top: 1px solid var(--line-paper);
}

.page-about .chapter:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .chapter-head {
  position: relative;
  margin-bottom: clamp(16px, 2.2vw, 26px);
}

.page-about .chapter-index {
  display: inline-block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--lava-deep);
  border: 1px solid var(--lava-deep);
  padding: 2px 7px;
  margin-bottom: 10px;
  line-height: 1.5;
}

.page-about .chapter-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.35rem, 2.5vw, 1.9rem);
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--brown);
  margin: 0;
  max-width: 24ch;
}

.page-about .chapter-note {
  margin: 8px 0 0;
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  color: var(--lava-deep);
}

.page-about .chapter-body {
  display: grid;
  gap: clamp(18px, 2.6vw, 30px);
}

.page-about .chapter-copy.prose {
  max-width: 40em;
}

.page-about .chapter-copy.prose p {
  margin: 0 0 1.1em;
  font-size: 1rem;
  line-height: 1.85;
}

.page-about .chapter-copy.prose p:last-child {
  margin-bottom: 0;
}

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

.page-about .media-frame img {
  width: 100%;
  height: auto;
  object-fit: cover;
  display: block;
}

/* ---------- 比分状态色卡 ---------- */
.page-about .state-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1px;
  background-color: var(--line-paper);
  border: 1px solid var(--line-paper);
}

.page-about .state-card {
  background-color: var(--paper-2);
  padding: 16px 14px 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .state-desc {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--rust);
}

/* ---------- 项目分布列表 ---------- */
.page-about .sport-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 2px solid var(--brown);
}

.page-about .sport-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  align-items: baseline;
  gap: 10px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line-paper);
}

.page-about .sport-name {
  font-size: 1rem;
  letter-spacing: 0.04em;
}

.page-about .sport-count {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.4rem;
  line-height: 1;
  color: var(--lava-deep);
}

.page-about .sport-unit {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--rust);
}

/* ---------- 折叠说明 ---------- */
.page-about .fold {
  border: 1px solid var(--line-paper);
  border-left: 3px solid var(--cyan);
  background-color: var(--paper);
  padding: 0;
}

.page-about .fold > summary {
  cursor: pointer;
  list-style: none;
  padding: 13px 16px;
  font-size: 0.9375rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--brown);
}

.page-about .fold > summary::-webkit-details-marker {
  display: none;
}

.page-about .fold > summary::before {
  content: "＋";
  font-family: var(--font-mono);
  color: var(--lava-deep);
  margin-right: 10px;
}

.page-about .fold[open] > summary::before {
  content: "－";
}

.page-about .fold > p {
  margin: 0;
  padding: 0 16px 16px;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--rust);
}

/* ---------- 团队分工 ---------- */
.page-about .role-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 2px solid var(--brown);
}

.page-about .role-item {
  display: grid;
  grid-template-columns: minmax(72px, auto) minmax(0, 1fr);
  gap: 4px 20px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line-paper);
}

.page-about .role-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.5rem, 3vw, 2rem);
  line-height: 1;
  color: var(--lava);
  background-color: var(--ink);
  padding: 6px 8px;
  align-self: start;
  text-align: center;
}

.page-about .role-name {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  align-self: center;
}

.page-about .role-desc {
  grid-column: 2;
  margin: 6px 0 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--rust);
}

/* ---------- 赛季三阶段 ---------- */
.page-about .phase-list {
  list-style: none;
  margin: 0 0 clamp(18px, 2.6vw, 28px);
  padding: 0;
  display: grid;
  border-top: 2px solid var(--brown);
}

.page-about .phase-item {
  position: relative;
  padding: 20px 0 16px;
  border-bottom: 1px solid var(--line-paper);
}

.page-about .phase-item::before {
  content: "";
  position: absolute;
  top: -4px;
  left: 0;
  width: 7px;
  height: 7px;
  background-color: var(--lava);
}

.page-about .phase-key {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--lava-deep);
}

.page-about .phase-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: 0.04em;
  color: var(--brown);
  margin: 6px 0 8px;
}

.page-about .phase-item p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--rust);
}

/* ---------- 服务范围数字条 ---------- */
.page-about .scope-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background-color: var(--line-paper);
  border: 1px solid var(--line-paper);
}

.page-about .scope-facts li {
  background-color: var(--paper-2);
  padding: 14px 16px;
  display: grid;
  grid-template-columns: minmax(76px, auto) minmax(0, 1fr);
  align-items: baseline;
  gap: 14px;
}

.page-about .scope-facts .num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.35rem;
  line-height: 1;
  color: var(--lava-deep);
}

.page-about .scope-facts li > span:last-child {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--brown);
}

/* ---------- 收尾引导 ---------- */
.page-about .about-outro {
  margin-top: clamp(40px, 6vw, 72px);
  border-top: 1px solid var(--line);
  background-color: var(--ink-2);
}

.page-about .about-outro__inner {
  padding: clamp(26px, 4vw, 44px) 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.page-about .about-outro__text {
  margin: 0;
  font-size: clamp(1rem, 1.6vw, 1.15rem);
  line-height: 1.7;
  color: var(--paper);
  max-width: 40em;
}

/* ============ 断点：平板 ============ */
@media (min-width: 720px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .phase-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 24px;
    border-top: 2px solid var(--brown);
  }

  .page-about .phase-item {
    border-bottom: 0;
    padding: 20px 0 8px;
  }

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

  .page-about .scope-facts li {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
  }
}

/* ============ 断点：桌面 ============ */
@media (min-width: 960px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .archive {
    grid-template-columns: minmax(0, 30%) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .archive-rail {
    position: sticky;
    top: 84px;
    border-bottom: 0;
    border-right: 1px solid var(--line);
    padding: 44px 26px 44px 0;
    max-height: calc(100vh - 108px);
    overflow-y: auto;
  }

  .page-about .rail-span {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    margin-bottom: 26px;
    font-size: 1rem;
    letter-spacing: 0.1em;
  }

  .page-about .rail-track {
    flex-direction: column;
    gap: 0;
    overflow-x: visible;
  }

  .page-about .rail-item a {
    border: 0;
    border-left: 1px solid var(--line);
    padding: 11px 10px 11px 16px;
    white-space: normal;
    font-size: 0.9375rem;
  }

  .page-about .rail-item a:hover {
    background-color: var(--ink-2);
    border-left-color: var(--lava);
  }

  .page-about .archive-body {
    border-top: 0;
    border-left: 1px solid var(--line-paper);
    min-height: 100%;
  }

  .page-about .chapter-head {
    padding-right: 52px;
  }

  .page-about .chapter-note {
    position: absolute;
    top: 2px;
    right: 0;
    margin: 0;
    writing-mode: vertical-rl;
    letter-spacing: 0.22em;
  }

  .page-about .chapter-body--media {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: start;
    gap: clamp(24px, 2.6vw, 40px);
  }

  .page-about .chapter-body--media .chapter-figure {
    margin-top: 4px;
  }

  .page-about .role-list {
    padding-right: 8px;
  }
}

@media (min-width: 1200px) {
  .page-about .archive-rail {
    padding-right: 40px;
  }

  .page-about .archive-body {
    padding: clamp(40px, 4vw, 64px);
  }
}

/* ============ 减少动效 ============ */
@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition-duration: 0.01ms !important;
  }
}
</final>