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

.page-about {
  --about-idx: 196px;
  --about-gap: clamp(30px, 4vw, 72px);
  --about-maxw: 76ch;
  background: var(--paper);
  color: var(--graphite);
  padding-bottom: clamp(48px, 8vw, 104px);
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  padding-top: clamp(18px, 3vw, 34px);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
}
.page-about .breadcrumb a {
  color: var(--ice);
  text-decoration: none;
}
.page-about .breadcrumb a:hover {
  color: var(--maple);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.page-about .breadcrumb [aria-current="page"] {
  color: var(--graphite);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(22px, 3.5vw, 44px) 0 clamp(34px, 5vw, 62px);
  border-bottom: var(--edge);
}

.page-about .about-hero .eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ice);
  margin: 0 0 18px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.page-about .about-hero .eyebrow::after {
  content: "";
  flex: 1 1 auto;
  height: 1px;
  background: var(--silver);
  max-width: 220px;
}

.page-about .about-hero h1 {
  margin: 0 0 clamp(18px, 2.4vw, 28px);
  font-size: clamp(1.9rem, 5.6vw, 3.9rem);
  line-height: 1.08;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--void);
  max-width: 20em;
}
.page-about .about-hero h1::after {
  content: "";
  display: block;
  width: 72px;
  height: 6px;
  margin-top: clamp(16px, 2.4vw, 26px);
  background: linear-gradient(90deg, var(--maple) 0%, var(--maple) 55%, var(--ice) 55%, var(--ice) 100%);
}

.page-about .about-hero .lede {
  margin: 0;
  max-width: 56ch;
  font-size: clamp(1rem, 1.5vw, 1.125rem);
  line-height: 1.85;
  color: var(--graphite);
}

/* 首屏数字带 */
.page-about .hero-facts {
  margin: clamp(26px, 3.6vw, 42px) 0 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--silver);
  border: var(--edge);
}
@media (min-width: 760px) {
  .page-about .hero-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}
.page-about .hero-fact {
  background: var(--paper);
  padding: clamp(14px, 2vw, 22px);
}
.page-about .hero-fact dt {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.12em;
  color: var(--muted);
}
.page-about .hero-fact dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3.2vw, 2.1rem);
  font-weight: 700;
  line-height: 1;
  color: var(--ice);
  letter-spacing: 0.01em;
}
.page-about .hero-fact dd small {
  display: block;
  margin-top: 8px;
  font-size: var(--fs-12);
  font-weight: 400;
  letter-spacing: 0.05em;
  color: var(--muted);
}
.page-about .hero-fact--amber dd {
  color: var(--amber);
}

/* ---------- 纵向长卷骨架 ---------- */
.page-about .about-spread {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
  padding-top: clamp(32px, 5vw, 68px);
}
@media (min-width: 1024px) {
  .page-about .about-spread {
    grid-template-columns: var(--about-idx) minmax(0, 1fr);
    gap: clamp(34px, 4vw, 76px);
  }
}

/* ---------- 批次索引 ---------- */
.page-about .batch-index {
  align-self: start;
}
@media (min-width: 1024px) {
  .page-about .batch-index {
    position: sticky;
    top: 28px;
  }
}
.page-about .batch-caption {
  margin: 0 0 6px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--void);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.18em;
  color: var(--muted);
  text-transform: uppercase;
}
.page-about .batch-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .batch-list a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 4px;
  text-decoration: none;
  color: var(--graphite);
  border-bottom: var(--edge);
  transition: color 0.2s ease, padding-left 0.2s ease, background-color 0.2s ease;
}
.page-about .batch-num {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  color: var(--ice);
}
.page-about .batch-label {
  font-size: var(--fs-14);
}
.page-about .batch-list a:hover,
.page-about .batch-list a:focus-visible {
  color: var(--maple);
  padding-left: 12px;
  background: var(--mist);
}
.page-about .batch-list a:hover .batch-num {
  color: var(--maple-deep);
}

@media (max-width: 1023px) {
  .page-about .batch-list {
    display: flex;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    border-bottom: var(--edge);
  }
  .page-about .batch-list::-webkit-scrollbar {
    display: none;
  }
  .page-about .batch-list li {
    flex: 0 0 auto;
  }
  .page-about .batch-list a {
    padding: 11px 16px;
    border-bottom: 0;
    border-right: var(--edge);
    white-space: nowrap;
  }
  .page-about .batch-list a:hover,
  .page-about .batch-list a:focus-visible {
    padding-left: 16px;
  }
}

/* ---------- 章节通用 ---------- */
.page-about .chapter {
  padding-bottom: clamp(44px, 6vw, 84px);
  border-bottom: var(--edge);
  scroll-margin-top: 28px;
}
.page-about .chapter + .chapter {
  padding-top: clamp(42px, 6vw, 78px);
}
.page-about .batch-stack > .chapter:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .chapter-head {
  max-width: var(--about-maxw);
  margin-bottom: clamp(24px, 3.2vw, 40px);
}
.page-about .chapter-eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.16em;
  color: var(--muted);
}
.page-about .chapter-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 32px;
  height: 22px;
  padding: 0 8px;
  background: var(--void);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
}
.page-about .chapter-title {
  margin: 0 0 16px;
  font-size: clamp(1.55rem, 3.4vw, 2.5rem);
  line-height: 1.2;
  font-weight: 900;
  letter-spacing: -0.015em;
  color: var(--void);
}
.page-about .chapter-lede {
  margin: 0;
  max-width: 50ch;
  font-size: clamp(1rem, 1.35vw, 1.0625rem);
  line-height: 1.85;
  color: var(--graphite);
}
.page-about .chapter-note {
  margin: clamp(20px, 2.6vw, 30px) 0 0;
  padding-left: clamp(14px, 2vw, 22px);
  border-left: 3px solid var(--ice-light);
  max-width: 58ch;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--muted);
}
.page-about .inline-link {
  color: var(--ice);
  text-decoration: none;
  border-bottom: 1px solid var(--ice-light);
  white-space: nowrap;
}
.page-about .inline-link:hover {
  color: var(--maple);
  border-bottom-color: var(--maple);
}

/* ---------- 图片框 ---------- */
.page-about .media-frame {
  margin: 0 0 clamp(24px, 3.2vw, 40px);
}
.page-about .media-frame img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  background: var(--void);
}
.page-about .media-caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--muted);
}

/* ---------- 时间轴 ---------- */
.page-about .timeline {
  margin-top: clamp(6px, 1vw, 14px);
}
.page-about .timeline-track {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
}
@media (min-width: 720px) {
  .page-about .timeline-track {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}
.page-about .timeline-node {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 16px 20px 0;
  border: 0;
  border-top: 2px solid var(--silver);
  background: transparent;
  text-align: left;
  cursor: pointer;
  font-family: var(--font-sans);
  transition: border-color 0.24s ease, background-color 0.24s ease;
}
.page-about .timeline-node::before {
  content: "";
  position: absolute;
  top: -7px;
  left: 0;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--silver);
  box-shadow: 0 0 0 4px var(--paper);
  transition: background-color 0.24s ease, box-shadow 0.24s ease;
}
.page-about .timeline-node:hover {
  background: var(--mist);
  border-top-color: var(--ice-light);
}
.page-about .timeline-node:hover::before {
  background: var(--ice-light);
}
.page-about .timeline-node[aria-selected="true"] {
  border-top-color: var(--amber);
  background: var(--mist);
}
.page-about .timeline-node[aria-selected="true"]::before {
  background: var(--amber);
  box-shadow: 0 0 0 4px var(--paper), 0 0 0 6px rgba(255, 138, 61, 0.28);
}
.page-about .node-year {
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--void);
}
.page-about .timeline-node[aria-selected="true"] .node-year {
  color: var(--maple-deep);
}
.page-about .node-name {
  font-size: var(--fs-14);
  line-height: 1.5;
  color: var(--muted);
}

.page-about .timeline-panel {
  margin-top: clamp(20px, 2.6vw, 30px);
  padding: clamp(22px, 3vw, 36px) clamp(20px, 3vw, 38px);
  border: var(--edge);
  border-top: 3px solid var(--maple);
  background: var(--paper);
  box-shadow: var(--shadow-paper);
}
.page-about .timeline-panel .panel-title {
  margin: 0 0 12px;
  font-size: var(--fs-20);
  font-weight: 700;
  color: var(--void);
}
.page-about .timeline-panel p {
  margin: 0;
  max-width: 58ch;
  font-size: var(--fs-16);
  line-height: 1.85;
  color: var(--graphite);
}

/* ---------- 团队标签页 ---------- */
.page-about .team-tabs {
  margin-top: clamp(6px, 1vw, 14px);
}
.page-about .team-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}
@media (min-width: 760px) {
  .page-about .team-list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}
.page-about .team-tab {
  padding: 14px 12px;
  border: var(--edge);
  background: var(--paper);
  color: var(--graphite);
  font-family: var(--font-sans);
  font-size: var(--fs-14);
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  transition: background-color 0.22s ease, color 0.22s ease, border-color 0.22s ease, transform 0.22s ease;
}
.page-about .team-tab:hover {
  border-color: var(--ice);
  color: var(--ice);
  transform: translateY(-2px);
}
.page-about .team-tab[aria-selected="true"] {
  background: var(--ice);
  border-color: var(--ice);
  color: var(--paper);
}
.page-about .team-panel {
  margin-top: clamp(18px, 2.4vw, 26px);
  padding: clamp(22px, 3vw, 34px);
  background: var(--mist);
  border-left: 4px solid var(--maple);
}
.page-about .team-panel .panel-title {
  margin: 0 0 12px;
  font-size: var(--fs-20);
  font-weight: 700;
  color: var(--void);
}
.page-about .team-panel p {
  margin: 0;
  max-width: 60ch;
  font-size: var(--fs-16);
  line-height: 1.85;
  color: var(--graphite);
}

/* ---------- 覆盖规模 ---------- */
.page-about .reach-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--silver);
  border: var(--edge);
  margin-bottom: clamp(24px, 3.2vw, 40px);
}
.page-about .reach-stat {
  background: var(--paper);
  padding: clamp(20px, 2.8vw, 32px);
}
.page-about .reach-num {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: clamp(2.2rem, 6vw, 3.6rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--ice);
}
.page-about .reach-num span {
  margin-left: 6px;
  font-size: 0.42em;
  letter-spacing: 0.04em;
  color: var(--muted);
}
.page-about .reach-stat--amber .reach-num {
  color: var(--amber);
}
.page-about .reach-label {
  margin: 0;
  max-width: 26ch;
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--graphite);
}

/* ---------- 伙伴协作 ---------- */
.page-about .partner-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--edge);
}
.page-about .partner-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  padding: clamp(18px, 2.4vw, 26px) 0;
  border-bottom: var(--edge);
}
@media (min-width: 760px) {
  .page-about .partner-item {
    grid-template-columns: 160px minmax(0, 1fr);
    gap: clamp(20px, 3vw, 40px);
    align-items: baseline;
  }
}
.page-about .partner-key {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.16em;
  color: var(--maple);
  text-transform: uppercase;
}
.page-about .partner-item p {
  margin: 0;
  max-width: 62ch;
  font-size: var(--fs-16);
  line-height: 1.85;
  color: var(--graphite);
}

/* ---------- 编辑主张 ---------- */
.page-about .editorial-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}
@media (min-width: 700px) {
  .page-about .editorial-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media (min-width: 1180px) {
  .page-about .editorial-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}
.page-about .edit-card {
  position: relative;
  padding: clamp(20px, 2.6vw, 28px) clamp(18px, 2.4vw, 24px);
  background: var(--paper);
  border: var(--edge);
  box-shadow: var(--shadow-paper);
}
.page-about .edit-card::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 4px;
  background: var(--ice);
}
.page-about .edit-card--maple::after {
  background: var(--maple);
}
.page-about .edit-tag {
  display: inline-block;
  margin-bottom: 14px;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--paper);
  background: var(--ice);
}
.page-about .edit-card--maple .edit-tag {
  background: var(--maple);
}
.page-about .edit-card p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--graphite);
}

/* ---------- 视觉识别 / 色板 ---------- */
.page-about .swatch-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}
@media (min-width: 700px) {
  .page-about .swatch-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
@media (min-width: 1180px) {
  .page-about .swatch-grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }
}
.page-about .swatch {
  display: flex;
  flex-direction: column;
  background: var(--paper);
  border: var(--edge);
  overflow: hidden;
  transition: transform 0.24s ease, box-shadow 0.24s ease, border-color 0.24s ease;
}
.page-about .swatch:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lift);
  border-color: var(--ice);
}
.page-about .swatch-chip {
  height: 72px;
}
.page-about .chip-maple { background: var(--maple); }
.page-about .chip-ice { background: var(--ice); }
.page-about .chip-amber { background: var(--amber); }
.page-about .chip-void { background: var(--void); }
.page-about .chip-mist { background: linear-gradient(135deg, #E4EFF8 0%, #A9D6F0 100%); }
.page-about .chip-silver { background: var(--silver); }
.page-about .swatch-body {
  padding: 14px 14px 18px;
}
.page-about .swatch-name {
  margin: 0 0 6px;
  font-size: var(--fs-14);
  font-weight: 700;
  color: var(--void);
}
.page-about .swatch-hex {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  color: var(--ice);
}
.page-about .swatch-use {
  margin: 0;
  font-size: var(--fs-12);
  line-height: 1.65;
  color: var(--muted);
}

/* ---------- 收束行动区 ---------- */
.page-about .about-cta {
  margin-top: clamp(48px, 7vw, 92px);
  padding: clamp(28px, 4vw, 52px) clamp(22px, 3.4vw, 48px);
  background: linear-gradient(140deg, var(--void) 0%, #132232 58%, #17324a 100%);
  border-top: 4px solid var(--maple);
  color: var(--paper);
}
.page-about .cta-eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--amber);
}
.page-about .cta-title {
  margin: 0 0 clamp(20px, 2.6vw, 30px);
  font-size: clamp(1.3rem, 2.8vw, 2rem);
  line-height: 1.24;
  font-weight: 900;
  color: var(--paper);
  max-width: 22em;
}
.page-about .cta-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.page-about .cta-links .btn {
  min-width: 0;
}

/* ---------- 降级动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .swatch,
  .page-about .team-tab,
  .page-about .batch-list a,
  .page-about .timeline-node {
    transition: none;
  }
  .page-about .swatch:hover,
  .page-about .team-tab:hover {
    transform: none;
  }
}
<<<END>>>