/* ============================================================
   品牌中心 /brand/  ·  页面专属样式
   作用域：.page-about
   ============================================================ */

.page-about {
  display: block;
  padding-bottom: clamp(56px, 8vw, 104px);
  overflow-x: clip;
}

.page-about .breadcrumbs {
  padding-top: clamp(18px, 3vw, 30px);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: clamp(22px, 4vw, 44px) 0 clamp(48px, 7vw, 86px);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -18%;
  right: -12%;
  width: min(620px, 78vw);
  height: 300px;
  background: linear-gradient(118deg, rgba(30, 75, 255, 0.3), rgba(43, 232, 176, 0.1) 58%, transparent 100%);
  clip-path: polygon(24% 0, 100% 0, 76% 100%, 0 100%);
  pointer-events: none;
}

.page-about .about-hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 5vw, 48px);
  align-items: center;
}

@media (min-width: 920px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
  }
}

.page-about .about-hero-copy .display {
  max-width: 16ch;
  margin: 14px 0 0;
}

.page-about .about-hero-copy .lede {
  margin: 20px 0 0;
  max-width: 56ch;
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-hero-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 34px;
  margin: 32px 0 0;
  padding: 18px 0 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .about-hero-facts li {
  display: flex;
  align-items: baseline;
  gap: 9px;
}

.page-about .about-hero-facts .num {
  font-size: clamp(24px, 3.4vw, 32px);
  color: var(--neon);
  letter-spacing: 0.02em;
}

.page-about .about-hero-media {
  position: relative;
  margin: 0;
}

.page-about .about-hero-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% 90%, 0 100%);
  background: linear-gradient(160deg, var(--slate), var(--ink));
  filter: saturate(0.86) contrast(1.06);
}

.page-about .about-hero-media::after {
  content: "";
  position: absolute;
  inset: 0 0 10% 0;
  background-image:
    linear-gradient(to right, rgba(60, 67, 80, 0.5) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(60, 67, 80, 0.5) 1px, transparent 1px);
  background-size: 56px 56px;
  mix-blend-mode: screen;
  opacity: 0.45;
  pointer-events: none;
}

.page-about .about-hero-media .img-cap {
  display: block;
  margin-top: 10px;
}

/* ---------- 通用分区 ---------- */

.page-about .band {
  margin-top: clamp(60px, 9vw, 116px);
}

.page-about .sec-head {
  display: grid;
  gap: 10px;
  max-width: 66ch;
  margin-bottom: clamp(22px, 3.4vw, 38px);
}

.page-about .sec-head h2 {
  margin: 0;
  font-size: clamp(26px, 4vw, 44px);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.012em;
  color: var(--bone);
}

.page-about .sec-head p {
  margin: 0;
  font-size: 16px;
  line-height: 1.78;
  color: rgba(242, 239, 230, 0.74);
}

/* ---------- 起步 ---------- */

.page-about .origin-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 46px);
}

@media (min-width: 960px) {
  .page-about .origin-grid {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    align-items: start;
  }
}

.page-about .origin-cards {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

@media (min-width: 620px) {
  .page-about .origin-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-about .origin-card {
  padding: clamp(20px, 2.6vw, 30px);
  background: var(--ink-soft);
}

.page-about .origin-card--accent {
  background: linear-gradient(155deg, rgba(76, 107, 74, 0.28), var(--ink-soft) 70%);
}

.page-about .origin-card p {
  margin: 12px 0 0;
  font-size: 16px;
  line-height: 1.78;
  color: rgba(242, 239, 230, 0.76);
}

/* ---------- 数据版图 ---------- */

.page-about .coverage-grid {
  height: clamp(126px, 19vw, 184px);
  border: 1px solid var(--line);
  background-color: var(--ink-soft);
  background-image:
    radial-gradient(circle, rgba(43, 232, 176, 0.9) 2.3px, transparent 2.9px),
    linear-gradient(to right, rgba(60, 67, 80, 0.42) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(60, 67, 80, 0.42) 1px, transparent 1px);
  background-size:
    calc(100% / 12) calc(100% / 8),
    calc(100% / 12) calc(100% / 8),
    calc(100% / 12) calc(100% / 8);
  background-repeat: repeat;
}

.page-about .coverage-legend {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
  padding: 12px 2px 0;
}

.page-about .stat-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: clamp(22px, 3vw, 34px);
  background: var(--line);
  border: 1px solid var(--line);
}

@media (min-width: 560px) {
  .page-about .stat-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1000px) {
  .page-about .stat-row {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .stat-row .stat {
  padding: clamp(18px, 2.4vw, 26px);
  background: var(--ink-soft);
  border-left: 2px solid transparent;
  transition: border-color 200ms ease, transform 200ms ease;
}

.page-about .stat-row .stat:hover {
  border-left-color: var(--away);
  transform: translateY(-3px);
}

.page-about .coverage-media {
  margin: clamp(28px, 4vw, 44px) 0 0;
}

.page-about .coverage-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  background: linear-gradient(200deg, var(--slate), var(--ink));
}

.page-about .coverage-media .img-cap {
  display: block;
  margin-top: 10px;
}

/* ---------- 四步流程 ---------- */

.page-about .flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  counter-reset: none;
}

@media (min-width: 780px) {
  .page-about .flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-about .flow-step details {
  height: 100%;
  border: 1px solid var(--line);
  border-left: 3px solid var(--slate);
  background: var(--ink-soft);
  transition: border-color 200ms ease, background 200ms ease;
}

.page-about .flow-step details:hover {
  border-left-color: var(--away);
}

.page-about .flow-step details[open] {
  border-left-color: var(--neon);
  background: linear-gradient(150deg, rgba(30, 75, 255, 0.14), var(--ink-soft) 62%);
}

.page-about .flow-step summary {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px clamp(16px, 2vw, 22px);
  cursor: pointer;
  list-style: none;
}

.page-about .flow-step summary::-webkit-details-marker {
  display: none;
}

.page-about .flow-num {
  font-size: 20px;
  color: var(--clay);
  letter-spacing: 0.06em;
}

.page-about .flow-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--bone);
  letter-spacing: 0.01em;
}

.page-about .flow-open {
  margin-left: auto;
  font-size: 20px;
  line-height: 1;
  color: var(--away-lift);
  transition: transform 220ms ease;
}

.page-about .flow-step details[open] .flow-open {
  transform: rotate(45deg);
  color: var(--neon);
}

.page-about .flow-body {
  padding: 0 clamp(16px, 2vw, 22px) 20px;
}

.page-about .flow-body p {
  margin: 0 0 12px;
  font-size: 15.5px;
  line-height: 1.78;
  color: rgba(242, 239, 230, 0.76);
}

.page-about .flow-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 12px;
  padding-top: 12px;
  margin-bottom: 0;
  border-top: 1px solid var(--line);
  font-size: 14px;
  color: rgba(242, 239, 230, 0.62);
}

.page-about .flow-media {
  margin: clamp(28px, 4vw, 44px) 0 0;
}

.page-about .flow-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 21 / 9;
  object-fit: cover;
  background: linear-gradient(180deg, var(--slate), var(--ink));
  filter: saturate(0.8) contrast(1.05);
}

.page-about .flow-media .img-cap {
  display: block;
  margin-top: 10px;
}

/* ---------- 团队分工 ---------- */

.page-about .roles-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
}

@media (min-width: 960px) {
  .page-about .roles-grid {
    grid-template-columns: minmax(0, 0.78fr) minmax(0, 1.22fr);
    align-items: start;
  }
}

.page-about .roles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
}

.page-about .role-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.page-about .role-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--bone);
  letter-spacing: 0.02em;
}

.page-about .role-num {
  font-size: clamp(26px, 3.4vw, 34px);
  color: var(--peak);
  letter-spacing: 0.02em;
}

.page-about .role-track {
  position: relative;
  height: 6px;
  background: var(--slate);
  overflow: hidden;
}

.page-about .role-fill {
  display: block;
  height: 100%;
  transition: filter 200ms ease;
}

.page-about .role-fill--edit { width: 39.1%; background: var(--neon); }
.page-about .role-fill--eng { width: 26.1%; background: var(--away); }
.page-about .role-fill--support { width: 19.6%; background: var(--clay); }
.page-about .role-fill--product { width: 15.2%; background: var(--moss); }

.page-about .role:hover .role-fill {
  filter: brightness(1.28);
}

.page-about .role-note {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.72;
  color: rgba(242, 239, 230, 0.66);
}

/* ---------- 版本时间轴 ---------- */

.page-about .timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 16px;
  bottom: 16px;
  width: 1px;
  background: linear-gradient(to bottom, var(--clay) 0%, var(--moss) 52%, var(--line) 100%);
}

.page-about .tl-item {
  position: relative;
  display: grid;
  grid-template-columns: 16px minmax(0, 1fr);
  gap: 20px;
  padding-bottom: 26px;
}

.page-about .tl-item:last-child {
  padding-bottom: 0;
}

.page-about .tl-item::before {
  content: "";
  grid-column: 1;
  width: 11px;
  height: 11px;
  margin-top: 22px;
  border-radius: 50%;
  background: var(--clay);
  box-shadow: 0 0 0 4px rgba(192, 102, 62, 0.16);
}

.page-about .tl-item--now::before {
  background: var(--neon);
  box-shadow: 0 0 0 4px rgba(43, 232, 176, 0.18), 0 0 18px rgba(43, 232, 176, 0.4);
}

.page-about .tl-body {
  padding: clamp(18px, 2.4vw, 26px);
}

.page-about .tl-year {
  display: block;
  font-size: 15px;
  letter-spacing: 0.14em;
  color: var(--clay);
  margin-bottom: 8px;
}

.page-about .tl-item--now .tl-year {
  color: var(--neon);
}

.page-about .tl-title {
  margin: 0;
  font-size: clamp(17px, 2vw, 20px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--bone);
}

.page-about .tl-text {
  margin: 10px 0 0;
  font-size: 15.5px;
  line-height: 1.76;
  color: rgba(242, 239, 230, 0.72);
}

.page-about .tl-item--now .panel {
  border-left: 3px solid var(--neon);
}

/* ---------- 合作生态 ---------- */

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

@media (min-width: 860px) {
  .page-about .coop-band {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .coop-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(20px, 2.6vw, 30px);
  border: 1px solid var(--line);
  border-top: 3px solid var(--away);
  background: var(--ink-soft);
  text-decoration: none;
  transition: transform 220ms ease, border-color 220ms ease, background 220ms ease;
}

.page-about .coop-card:nth-child(2) { border-top-color: var(--neon); }
.page-about .coop-card:nth-child(3) { border-top-color: var(--clay); }

.page-about .coop-card:hover {
  transform: translateY(-4px);
  border-color: var(--away);
  background: linear-gradient(158deg, rgba(30, 75, 255, 0.16), var(--ink-soft) 66%);
}

.page-about .coop-index {
  font-size: 13px;
  letter-spacing: 0.16em;
  color: rgba(242, 239, 230, 0.4);
}

.page-about .coop-card h3 {
  margin: 0;
  font-size: clamp(18px, 2.2vw, 22px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--bone);
}

.page-about .coop-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.74;
  color: rgba(242, 239, 230, 0.72);
}

.page-about .coop-go {
  margin-top: auto;
  padding-top: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--away-lift);
  letter-spacing: 0.02em;
}

.page-about .coop-card:hover .coop-go {
  color: var(--neon);
}

.page-about .coop-foot {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  margin-top: clamp(26px, 3.6vw, 40px);
  padding-top: clamp(20px, 2.6vw, 30px);
  border-top: 1px solid var(--line);
}

@media (min-width: 900px) {
  .page-about .coop-foot {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 40px;
  }
}

.page-about .coop-foot p {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.78;
  color: rgba(242, 239, 230, 0.76);
}

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

/* ---------- 窄屏收束 ---------- */

@media (max-width: 420px) {
  .page-about .about-hero-facts {
    gap: 12px 20px;
  }

  .page-about .flow-step summary {
    gap: 12px;
  }

  .page-about .tl-item {
    grid-template-columns: 12px minmax(0, 1fr);
    gap: 14px;
  }

  .page-about .timeline::before {
    left: 4px;
  }

  .page-about .tl-item::before {
    width: 9px;
    height: 9px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .stat-row .stat,
  .page-about .coop-card,
  .page-about .flow-open,
  .page-about .role-fill {
    transition: none;
  }

  .page-about .stat-row .stat:hover,
  .page-about .coop-card:hover {
    transform: none;
  }
}
<<<END>>>