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

.page-about {
  --about-rail: 76px;
  --about-ink: var(--ink-abyss);
}

/* ---- 面包屑 ---- */
.page-about .about-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 18px 0 4px;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}

/* ---- 首屏 ---- */
.page-about .about-intro {
  padding: clamp(20px, 4vw, 44px) 0 clamp(48px, 7vw, 88px);
}

.page-about .about-intro__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 56px);
  align-items: end;
}

.page-about .about-title {
  margin: 12px 0 22px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(38px, 9vw, 92px);
  line-height: 0.98;
  letter-spacing: -0.012em;
  color: var(--text);
  text-wrap: balance;
}

.page-about .about-title em {
  font-style: normal;
  color: var(--neon);
}

.page-about .about-lede {
  max-width: 34em;
  margin: 0 0 clamp(28px, 4vw, 44px);
  color: var(--text);
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.8;
}

/* 基线数字 */
.page-about .about-baseline {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .bl-item {
  padding: 16px 16px 18px;
  background: var(--stand-green);
}

.page-about .bl-num {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(28px, 4.4vw, 46px);
  font-weight: 700;
  line-height: 1;
  color: var(--neon);
  letter-spacing: -0.02em;
}

.page-about .bl-num span {
  font-size: 0.55em;
  color: var(--mist);
}

.page-about .bl-label {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--muted);
}

/* 首屏图片 */
.page-about .about-intro__media {
  position: relative;
  margin: 0;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line-soft);
  overflow: hidden;
  aspect-ratio: 5 / 6;
  background: var(--panel-green);
}

.page-about .about-intro__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.88;
}

.page-about .about-intro__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, rgba(59, 242, 200, 0.16), rgba(5, 19, 15, 0.75) 62%);
  pointer-events: none;
}

.page-about .about-intro__media .media-frame__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  margin: 0;
  padding: 14px 18px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--mist);
  background: linear-gradient(180deg, transparent, rgba(5, 19, 15, 0.92));
  z-index: 1;
}

/* ---- 章节索引 ---- */
.page-about .about-toc {
  padding-bottom: clamp(28px, 4vw, 48px);
}

.page-about .toc-label {
  margin: 0 0 10px;
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--muted);
}

.page-about .toc-list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .toc-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  background: var(--panel-green);
  color: var(--text);
  font-size: 13px;
  white-space: nowrap;
  text-decoration: none;
  transition: border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.page-about .toc-link:hover {
  border-color: var(--neon);
  color: var(--neon);
  transform: translateY(-2px);
}

.page-about .toc-link:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 2px;
}

.page-about .toc-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* ---- 章节骨架 ---- */
.page-about .about-chapter {
  padding: clamp(48px, 7vw, 104px) 0;
}

.page-about .chapter-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .chapter-num {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--neon);
}

.page-about .chapter-num::after {
  content: "";
  width: 44px;
  height: 1px;
  background: var(--line-hard);
}

.page-about .chapter-title {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 5vw, 46px);
  line-height: 1.12;
  letter-spacing: -0.008em;
  color: var(--text);
  text-wrap: balance;
}

.page-about .chapter-text {
  max-width: 42em;
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text);
}

.page-about .chapter-text:last-child {
  margin-bottom: 0;
}

/* ---- 02 时间轴全宽带 ---- */
.page-about .about-band {
  padding: clamp(56px, 8vw, 112px) 0;
  background: var(--stand-green);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .band-head {
  max-width: 46em;
  margin-bottom: clamp(36px, 5vw, 64px);
}

.page-about .chapter-num--band {
  margin-bottom: 16px;
}

.page-about .band-head .section-title--display {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 6.4vw, 68px);
  line-height: 1.02;
  letter-spacing: -0.015em;
  color: var(--text);
}

.page-about .timeline {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin: 0;
  padding: 0;
  list-style: none;
  position: relative;
}

.page-about .tl-node {
  position: relative;
  padding: 26px 22px 22px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  background: var(--panel-green);
  transition: transform 0.22s ease, border-color 0.22s ease;
}

.page-about .tl-node:hover,
.page-about .tl-node:focus-within {
  transform: translateY(-4px);
  border-color: var(--neon);
}

.page-about .tl-node:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 3px;
}

.page-about .tl-dot {
  position: absolute;
  top: 14px;
  left: 22px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--shot);
  box-shadow: 0 0 0 4px rgba(255, 106, 61, 0.16);
}

.page-about .tl-ver {
  margin: 18px 0 10px;
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--neon);
}

.page-about .tl-title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 800;
  line-height: 1.3;
  color: var(--text);
}

.page-about .tl-text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .tl-extra {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  max-height: none;
  opacity: 1;
}

.page-about .tl-extra li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 8px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .tl-extra li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 1px;
  background: var(--neon);
}

/* ---- 03 数据工艺 ---- */
.page-about .craft-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 40px);
  margin-top: 26px;
  align-items: start;
}

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

.page-about .craft-item {
  padding: 16px 0 16px 18px;
  border-left: 2px solid var(--line-hard);
  border-bottom: 1px solid var(--line-soft);
  transition: border-left-color 0.22s ease, background-color 0.22s ease;
}

.page-about .craft-item:first-child {
  border-top: 1px solid var(--line-soft);
}

.page-about .craft-item:hover {
  border-left-color: var(--neon);
  background: rgba(59, 242, 200, 0.05);
}

.page-about .craft-key {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--neon);
}

.page-about .craft-item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text);
}

.page-about .craft-media {
  margin: 0;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line-soft);
  overflow: hidden;
  background: var(--panel-green);
}

.page-about .craft-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .craft-media .media-frame__caption {
  margin: 0;
  padding: 12px 16px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--muted);
  border-top: 1px solid var(--line-soft);
}

/* ---- 04 团队 ---- */
.page-about .team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 26px;
}

.page-about .team-card {
  padding: 22px 20px 24px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  background: linear-gradient(170deg, var(--panel-green), var(--stand-green));
  transition: transform 0.22s ease, border-color 0.22s ease;
}

.page-about .team-card:hover {
  transform: translateY(-4px);
  border-color: var(--neon);
}

.page-about .team-card:focus-within {
  border-color: var(--neon);
}

.page-about .team-num {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(34px, 5.4vw, 52px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--neon);
}

.page-about .team-name {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  color: var(--text);
}

.page-about .team-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---- 05 覆盖版图 ---- */
.page-about .coverage-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 40px);
  margin-top: 26px;
  align-items: start;
}

.page-about .league-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .league {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 13px 14px;
  background: var(--stand-green);
  font-size: 14px;
  color: var(--text);
}

.page-about .league-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--shot);
  flex: none;
}

.page-about .coverage-figure {
  margin: 0;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line-soft);
  overflow: hidden;
  background: var(--panel-green);
}

.page-about .coverage-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.page-about .coverage-figure .media-frame__caption {
  margin: 0;
  padding: 12px 16px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--muted);
  border-top: 1px solid var(--line-soft);
}

/* ---- 06 伙伴与认可 ---- */
.page-about .partner-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 26px;
}

.page-about .partner-card {
  padding: 22px 20px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  background: var(--stand-green);
}

.page-about .partner-card--wide {
  border-color: rgba(59, 242, 200, 0.36);
  background: linear-gradient(150deg, rgba(59, 242, 200, 0.1), var(--panel-green) 70%);
}

.page-about .partner-num {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(30px, 4.6vw, 42px);
  font-weight: 700;
  line-height: 1;
  color: var(--neon);
}

.page-about .partner-num span {
  font-size: 0.5em;
  color: var(--mist);
  margin-left: 2px;
}

.page-about .partner-label {
  margin: 0 0 10px;
  font-size: 14px;
  font-weight: 700;
  color: var(--text);
}

.page-about .partner-desc {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---- 07 下一阶段 ---- */
.page-about .next-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 26px;
}

.page-about .next-card {
  padding: 24px 22px 26px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  background: var(--panel-green);
  transition: transform 0.22s ease, border-color 0.22s ease;
}

.page-about .next-card:hover {
  transform: translateY(-4px);
  border-color: var(--mist);
}

.page-about .next-card .tag {
  margin-bottom: 14px;
}

.page-about .next-title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 800;
  line-height: 1.3;
  color: var(--text);
}

.page-about .next-text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---- 收尾 ---- */
.page-about .about-cta {
  padding: clamp(52px, 7vw, 96px) 0 clamp(64px, 9vw, 120px);
  border-top: 1px solid var(--line-soft);
  background:
    radial-gradient(120% 90% at 12% 0%, rgba(59, 242, 200, 0.13), transparent 60%),
    var(--ink-abyss);
}

.page-about .about-cta__inner {
  max-width: 44em;
}

.page-about .cta-title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(28px, 5.4vw, 52px);
  line-height: 1.08;
  letter-spacing: -0.012em;
  color: var(--text);
}

.page-about .cta-text {
  margin: 0 0 28px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
}

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

.page-about .cta-actions .btn:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 3px;
}

/* ============ 断点 ============ */

@media (min-width: 640px) {
  .page-about .about-baseline {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .partner-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .partner-card--wide {
    grid-column: 1 / -1;
  }

  .page-about .next-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 880px) {
  .page-about .about-intro__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(36px, 5vw, 72px);
  }

  .page-about .about-intro__media {
    aspect-ratio: 5 / 7;
  }

  .page-about .chapter-inner {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(24px, 4vw, 56px);
    align-items: start;
  }

  .page-about .chapter-rail {
    position: sticky;
    top: calc(var(--header-h) + 30px);
    align-self: start;
  }

  .page-about .chapter-num {
    display: block;
    font-size: 13px;
  }

  .page-about .chapter-num::after {
    display: block;
    width: 1px;
    height: 84px;
    margin-top: 14px;
    background: linear-gradient(180deg, var(--neon), rgba(59, 242, 200, 0));
  }

  .page-about .timeline {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(20px, 3vw, 36px);
  }

  .page-about .timeline::before {
    content: "";
    position: absolute;
    top: 19px;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, var(--neon), rgba(59, 242, 200, 0.16));
  }

  .page-about .tl-node {
    padding-top: 44px;
  }

  .page-about .tl-dot {
    top: 14px;
    left: 0;
  }

  .page-about .tl-ver {
    margin-top: 0;
  }

  .page-about .tl-extra {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    margin-top: 0;
    transition: max-height 0.34s ease, opacity 0.28s ease, margin-top 0.34s ease;
  }

  .page-about .tl-node:hover .tl-extra,
  .page-about .tl-node:focus-within .tl-extra {
    max-height: 220px;
    opacity: 1;
    margin-top: 14px;
  }

  .page-about .craft-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
  }

  .page-about .coverage-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

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

  .page-about .team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px 24px;
  }

  .page-about .team-card:nth-child(1) {
    margin-top: 0;
  }

  .page-about .team-card:nth-child(2) {
    margin-top: 38px;
  }

  .page-about .team-card:nth-child(3) {
    margin-top: -18px;
  }

  .page-about .team-card:nth-child(4) {
    margin-top: 20px;
  }
}

@media (min-width: 1100px) {
  .page-about .partner-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1.4fr);
  }

  .page-about .partner-card--wide {
    grid-column: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl-node,
  .page-about .team-card,
  .page-about .next-card,
  .page-about .toc-link {
    transition: none;
  }

  .page-about .tl-node:hover,
  .page-about .tl-node:focus-within,
  .page-about .team-card:hover,
  .page-about .next-card:hover,
  .page-about .toc-link:hover {
    transform: none;
  }
}