/* ===== 品牌中心 · 页面作用域 ===== */
.page-about {
  display: block;
  overflow-x: clip;
  padding-bottom: var(--gap-block);
}

/* --- 面包屑 --- */
.page-about .breadcrumb {
  padding-top: clamp(20px, 4vw, 34px);
  font-size: .74rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink);
}
.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--ink);
  opacity: .55;
}
.page-about .breadcrumb a {
  color: var(--soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--electric);
  border-bottom-color: var(--electric);
}

/* --- 章起手式 --- */
.page-about .about-section {
  padding-top: var(--gap-block);
}
.page-about .eyebrow {
  margin: 0;
  font-family: var(--font-num);
  font-size: .72rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--electric);
}
.page-about .section-title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: var(--size-lg);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: -.01em;
  color: var(--paper);
  max-width: 22ch;
}
.page-about .lede {
  margin: 20px 0 0;
  max-width: 62ch;
  font-size: var(--size-md);
  line-height: 1.8;
  color: var(--soft);
}
.page-about .prose p {
  margin: 16px 0 0;
  max-width: 66ch;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--soft);
}

/* --- 首屏 --- */
.page-about .about-hero {
  padding: clamp(40px, 7vw, 76px) 0 clamp(34px, 5vw, 54px);
  border-bottom: 1px solid var(--line);
}
.page-about .about-hero h1 {
  margin: 18px 0 0;
  max-width: 17ch;
  font-family: var(--font-display);
  font-size: var(--size-xl);
  font-weight: 800;
  line-height: .96;
  letter-spacing: -.02em;
  color: var(--paper);
}
.page-about .about-hero .lede {
  margin-top: 26px;
  color: var(--soft);
}
.page-about .hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px 20px;
  margin-top: clamp(32px, 5vw, 52px);
  padding-top: 26px;
  border-top: 1px dashed var(--line);
}
.page-about .hero-stat {
  padding-left: 14px;
  border-left: 2px solid var(--line);
  transition: border-color var(--dur) var(--ease);
}
.page-about .hero-stat:hover {
  border-left-color: var(--electric);
}
.page-about .hero-stat .num-lg {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(1.6rem, 4.2vw, 2.3rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -.01em;
  color: var(--amber);
  font-variant-numeric: tabular-nums;
}
.page-about .hero-stat .stat-label {
  display: block;
  margin-top: 7px;
  font-size: .72rem;
  line-height: 1.6;
  letter-spacing: .12em;
  color: var(--ink);
}

/* --- 媒体框 --- */
.page-about .about-media {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  background: linear-gradient(140deg, var(--slate) 0%, var(--deep) 72%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}
.page-about .about-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.9) contrast(1.05);
  transition: transform var(--dur) var(--ease);
}
.page-about .about-media:hover img {
  transform: scale(1.015);
}
.page-about .about-media .img-cap {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 30px 16px 12px;
  font-size: .74rem;
  line-height: 1.55;
  letter-spacing: .04em;
  color: var(--soft);
  background: linear-gradient(to top, rgba(10, 26, 47, .94), rgba(10, 26, 47, 0));
}

/* --- 由来分栏 --- */
.page-about .origin-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}
.page-about .origin-points {
  display: grid;
  gap: 12px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}
.page-about .origin-points li {
  position: relative;
  padding-left: 22px;
  font-size: .95rem;
  line-height: 1.72;
  color: var(--soft);
}
.page-about .origin-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 10px;
  height: 2px;
  background: var(--amber);
}

/* --- 连接范围 --- */
.page-about .reach-band {
  position: relative;
  margin: clamp(30px, 4.6vw, 54px) 0 0;
  overflow: hidden;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(120deg, var(--night), var(--deep));
}
.page-about .reach-band img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 46vh;
  object-fit: cover;
  filter: saturate(.88) contrast(1.06);
}
.page-about .reach-band .img-cap {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 34px 20px 14px;
  font-size: .74rem;
  line-height: 1.55;
  letter-spacing: .04em;
  color: var(--soft);
  background: linear-gradient(to top, rgba(10, 26, 47, .95), rgba(10, 26, 47, 0));
}
.page-about .reach-visual {
  margin-top: clamp(26px, 4vw, 40px);
  border-bottom: 1px solid var(--line);
}
.page-about .reach-visual svg {
  display: block;
  width: 100%;
  height: clamp(72px, 12vw, 120px);
}
.page-about .reach-grid {
  display: grid;
  grid-template-columns: 1fr;
  margin-top: clamp(24px, 3.6vw, 38px);
  border-top: 1px solid var(--line-strong);
}
.page-about .reach-cell {
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
  transition: border-color var(--dur) var(--ease);
}
.page-about .reach-cell:hover {
  border-bottom-color: var(--electric);
}
.page-about .reach-cell .num-lg {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(1.5rem, 3.6vw, 2rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--electric);
  font-variant-numeric: tabular-nums;
}
.page-about .reach-cell .stat-label {
  display: block;
  margin-top: 8px;
  font-size: .78rem;
  line-height: 1.65;
  letter-spacing: .04em;
  color: var(--ink);
}
.page-about .reach-notes {
  margin-top: clamp(24px, 3.4vw, 34px);
  display: grid;
  gap: 14px;
}
.page-about .reach-notes p {
  margin: 0;
  max-width: 66ch;
  font-size: .95rem;
  line-height: 1.8;
  color: var(--soft);
}
.page-about .reach-notes a {
  color: var(--electric);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.page-about .reach-notes a:hover,
.page-about .reach-notes a:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--paper);
}

/* --- 资料团队 --- */
.page-about .team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
}
.page-about .team-ledger {
  display: grid;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-strong);
}
.page-about .team-row {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  transition: border-color var(--dur) var(--ease);
}
.page-about .team-row:hover {
  border-bottom-color: var(--electric);
}
.page-about .team-row .num {
  font-family: var(--font-num);
  font-size: 1.32rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--amber);
  font-variant-numeric: tabular-nums;
}
.page-about .team-row h3 {
  margin: 0;
  font-size: .98rem;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--paper);
}
.page-about .team-row p {
  margin: 6px 0 0;
  font-size: .84rem;
  line-height: 1.68;
  color: var(--ink);
}

/* --- 赛季时间轴 --- */
.page-about .season-line {
  margin: clamp(30px, 4.6vw, 50px) 0 0;
  padding: 0 0 0 26px;
  list-style: none;
  max-width: 74ch;
}
.page-about .season-item {
  position: relative;
  padding: 0 0 34px 26px;
  border-left: 1px solid var(--line);
}
.page-about .season-item:last-child {
  padding-bottom: 0;
}
.page-about .season-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: .55em;
  width: 9px;
  height: 9px;
  margin-left: -5px;
  background: var(--amber);
  transform: rotate(45deg);
  transition: background var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.page-about .season-item:hover::before,
.page-about .season-item:focus-within::before {
  background: var(--electric);
  transform: rotate(45deg) scale(1.3);
}
.page-about .season-year {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(1.6rem, 4.2vw, 2.2rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.01em;
  color: var(--paper);
  font-variant-numeric: tabular-nums;
}
.page-about .season-item h3 {
  margin: 10px 0 0;
  font-size: 1rem;
  letter-spacing: .05em;
  color: var(--electric);
}
.page-about .season-item > p {
  margin: 10px 0 0;
  max-width: 60ch;
  font-size: .92rem;
  line-height: 1.76;
  color: var(--soft);
}
.page-about .season-note {
  display: block;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  margin: 0;
  font-size: .82rem;
  line-height: 1.7;
  color: var(--amber);
  transition: max-height 260ms var(--ease), opacity 220ms var(--ease), margin-top 220ms var(--ease);
}
.page-about .season-item:hover .season-note,
.page-about .season-item:focus-within .season-note {
  max-height: 8rem;
  opacity: 1;
  margin-top: 10px;
}

/* --- 线下小组 --- */
.page-about .groups-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}
.page-about .groups-media {
  max-width: 100%;
}
.page-about .group-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin: clamp(34px, 5vw, 52px) 0 0;
  padding: 0;
  list-style: none;
}
.page-about .group-card {
  position: relative;
  padding: 22px 20px 24px;
  background: var(--night);
  border: 1px solid var(--line);
  box-shadow: 7px 7px 0 -1px rgba(22, 50, 79, .9), 8px 8px 0 0 var(--line);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.page-about .group-card:hover {
  border-color: var(--electric);
  transform: translate(-3px, -3px);
  box-shadow: 10px 10px 0 -1px rgba(22, 50, 79, .95), 11px 11px 0 0 var(--line-strong);
}
.page-about .group-card .tag {
  display: inline-block;
  margin-bottom: 12px;
  padding: 3px 9px;
  font-family: var(--font-num);
  font-size: .66rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--electric);
  background: rgba(35, 224, 208, .06);
  border: 1px solid var(--line-strong);
}
.page-about .group-card h3 {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--paper);
}
.page-about .group-card p {
  margin: 10px 0 0;
  font-size: .86rem;
  line-height: 1.74;
  color: var(--ink);
}

/* --- 长期做法 --- */
.page-about .pledge {
  counter-reset: pledge;
  margin: clamp(28px, 4.4vw, 46px) 0 0;
  padding: 0;
  list-style: none;
  max-width: 90ch;
  border-top: 1px solid var(--line-strong);
}
.page-about .pledge-item {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
  transition: border-color var(--dur) var(--ease);
}
.page-about .pledge-item::before {
  counter-increment: pledge;
  content: counter(pledge, decimal-leading-zero);
  padding-top: 4px;
  font-family: var(--font-num);
  font-size: .82rem;
  letter-spacing: .08em;
  color: var(--electric);
}
.page-about .pledge-item:hover {
  border-bottom-color: var(--line-strong);
}
.page-about .pledge-body h3 {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--paper);
}
.page-about .pledge-body p {
  margin: 8px 0 0;
  font-size: .86rem;
  line-height: 1.72;
  color: var(--ink);
}

/* --- 收尾行动 --- */
.page-about .about-cta {
  padding-top: var(--gap-block);
}
.page-about .cta-panel {
  position: relative;
  padding: clamp(30px, 5vw, 54px);
  background: linear-gradient(135deg, var(--slate) 0%, var(--night) 58%, var(--deep) 100%);
  border: 1px solid var(--line-strong);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 34px), calc(100% - 34px) 100%, 0 100%);
}
.page-about .cta-panel h2 {
  margin: 0;
  max-width: 20ch;
  font-family: var(--font-display);
  font-size: var(--size-lg);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -.01em;
  color: var(--paper);
}
.page-about .cta-panel p {
  margin: 16px 0 0;
  max-width: 58ch;
  font-size: .96rem;
  line-height: 1.82;
  color: var(--soft);
}
.page-about .cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

/* --- 响应式 --- */
@media (min-width: 640px) {
  .page-about .group-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 780px) {
  .page-about .reach-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .reach-cell {
    padding: 24px 22px 24px 0;
    border-bottom: 0;
    border-right: 1px solid var(--line);
  }
  .page-about .reach-cell:last-child {
    border-right: 0;
  }
  .page-about .reach-notes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
  }
}

@media (min-width: 860px) {
  .page-about .hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 26px;
  }
}

@media (min-width: 960px) {
  .page-about .origin-split {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(36px, 5vw, 64px);
    align-items: start;
  }
  .page-about .origin-media {
    margin-top: 34px;
  }
  .page-about .team-grid {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    gap: clamp(36px, 5vw, 64px);
    align-items: start;
  }
  .page-about .groups-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(34px, 5vw, 62px);
    align-items: center;
  }
  .page-about .groups-media {
    transform: translateY(-16px);
  }
}

@media (min-width: 1080px) {
  .page-about .group-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .pledge-item {
    grid-template-columns: 64px minmax(0, 1fr);
    gap: 22px;
    padding: 24px 0;
  }
}

@media (hover: none) {
  .page-about .season-note {
    max-height: 8rem;
    opacity: 1;
    margin-top: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-media img,
  .page-about .group-card,
  .page-about .season-item::before,
  .page-about .season-note,
  .page-about .hero-stat,
  .page-about .reach-cell,
  .page-about .team-row {
    transition: none;
  }
  .page-about .about-media:hover img {
    transform: none;
  }
  .page-about .group-card:hover {
    transform: none;
  }
}