.page-about {
  background: var(--paper);
  color: var(--ink);
  overflow-x: clip;
}

/* ---------- 首屏拼贴 ---------- */
.page-about .about-hero {
  position: relative;
  background: var(--deep);
  color: var(--paper);
  padding: 22px 0 clamp(38px, 7vw, 76px);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: -20%;
  right: -12%;
  width: 62%;
  height: 120%;
  background: radial-gradient(circle at 40% 40%, rgba(22, 194, 200, 0.22), rgba(22, 194, 200, 0) 68%);
  pointer-events: none;
}

.page-about .breadcrumb {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: clamp(22px, 4vw, 42px);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: rgba(201, 214, 228, 0.78);
}

.page-about .breadcrumb a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid rgba(201, 214, 228, 0.35);
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

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

.page-about .about-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 30px;
}

.page-about .kicker {
  display: inline-block;
  margin: 0 0 16px;
  padding: 4px 10px;
  border: 1px solid rgba(201, 214, 228, 0.4);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about h1 {
  margin: 0 0 18px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(28px, 5.4vw, 50px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: #fff;
  max-width: 17em;
}

.page-about .about-hero-lead {
  max-width: 34em;
  margin: 0;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.8;
  color: rgba(245, 247, 248, 0.82);
}

.page-about .hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(201, 214, 228, 0.22);
  border: 1px solid rgba(201, 214, 228, 0.22);
}

.page-about .hero-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 14px 12px;
  background: rgba(14, 42, 56, 0.9);
}

.page-about .hero-stat:first-child .stat-num {
  color: var(--orange);
}

.page-about .stat-num {
  font-family: var(--font-num);
  font-size: clamp(24px, 3.4vw, 32px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--paper);
}

.page-about .stat-label {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-about .hero-note {
  margin: 14px 0 0;
  padding-left: 12px;
  border-left: 3px solid var(--cyan);
  font-size: 13px;
  line-height: 1.7;
  color: rgba(201, 214, 228, 0.9);
}

/* ---------- 主体骨架：窄索引 + 宽正文 ---------- */
.page-about .about-layout {
  padding-top: clamp(30px, 5vw, 56px);
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-about .about-index {
  margin-bottom: 22px;
  padding: 12px 0;
  border-top: var(--rule);
  border-bottom: var(--rule);
}

.page-about .index-title {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: rgba(16, 24, 32, 0.55);
}

.page-about .index-list {
  display: flex;
  gap: 14px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .index-link {
  display: block;
  white-space: nowrap;
  padding: 2px 0;
  font-size: 13px;
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-about .index-link:hover {
  color: var(--orange);
  border-color: var(--orange);
}

/* ---------- 章节 ---------- */
.page-about .about-section {
  padding: clamp(34px, 5vw, 58px) 0;
  border-top: var(--rule);
}

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

.page-about .section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 18px;
}

.page-about .section-num {
  font-family: var(--font-num);
  font-size: clamp(18px, 2.2vw, 24px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--orange);
  padding: 4px 8px;
  border: var(--rule);
  background: #fff;
}

.page-about .section-title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(21px, 3.2vw, 31px);
  line-height: 1.22;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-about .about-lede {
  max-width: 34em;
  margin: 0 0 22px;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(16, 24, 32, 0.75);
}

.page-about .sub-title {
  margin: 28px 0 12px;
  font-size: 16px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ink);
}

/* ---------- 业务版图 ---------- */
.page-about .biz-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.page-about .biz-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 20px 18px 22px;
  background: #fff;
  border: var(--rule);
  box-shadow: var(--shadow-card);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), border-color 0.3s var(--ease);
}

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

.page-about .biz-tag {
  align-self: flex-start;
  padding: 3px 9px;
  font-size: 12px;
  letter-spacing: 0.08em;
  border: 1px solid currentColor;
}

.page-about .biz-tag--blue {
  color: var(--blue);
}

.page-about .biz-tag--cyan {
  color: #0f9aa0;
}

.page-about .biz-tag--orange {
  color: var(--orange);
}

.page-about .biz-title {
  margin: 0;
  font-size: 17px;
  font-weight: 800;
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.page-about .biz-list {
  display: grid;
  gap: 9px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(16, 24, 32, 0.78);
}

.page-about .biz-list li {
  position: relative;
  padding-left: 14px;
}

.page-about .biz-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.66em;
  width: 6px;
  height: 6px;
  background: var(--cyan);
}

/* ---------- 赛季时间轴 ---------- */
.page-about .tl-hint {
  margin: 0 0 20px;
  font-size: 13px;
  letter-spacing: 0.02em;
  color: rgba(16, 24, 32, 0.55);
}

.page-about .tl {
  position: relative;
  margin: 0;
  padding: 4px 0 0 26px;
  list-style: none;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), rgba(22, 194, 200, 0.12));
}

.page-about .tl-node {
  position: relative;
  padding: 0 0 24px;
}

.page-about .tl-node::before {
  content: "";
  position: absolute;
  left: -25px;
  top: 8px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 106, 19, 0.16);
}

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

.page-about .tl-era {
  display: block;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--blue);
}

.page-about .tl-title {
  margin: 5px 0 0;
  font-size: 16px;
  font-weight: 800;
  line-height: 1.4;
  letter-spacing: -0.01em;
}

.page-about .tl-more {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(16, 24, 32, 0.72);
}

/* ---------- 图片 ---------- */
.page-about .figure {
  margin: 26px 0 0;
}

.page-about .figure-media {
  overflow: hidden;
  border: var(--rule);
  background: var(--cool);
}

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

.page-about .figure--slant .figure-media {
  clip-path: polygon(0 3%, 100% 0, 100% 97%, 0 100%);
}

.page-about .figure-caption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.7;
  color: rgba(16, 24, 32, 0.58);
  border-left: 2px solid var(--cyan);
  padding-left: 10px;
}

/* ---------- 团队与节奏 ---------- */
.page-about .team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.page-about .team-card {
  padding: 20px;
  background: #fff;
  border: var(--rule);
  box-shadow: var(--shadow-card);
}

.page-about .team-num {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(30px, 4.4vw, 40px);
  font-weight: 700;
  line-height: 1;
  color: var(--blue);
}

.page-about .team-label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: rgba(16, 24, 32, 0.58);
}

.page-about .team-desc {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(16, 24, 32, 0.76);
}

.page-about .rhythm {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: var(--rule);
}

.page-about .rhythm li {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 12px;
  padding: 12px 0;
  border-bottom: var(--rule);
}

.page-about .rhythm-time {
  font-family: var(--font-num);
  font-size: 13px;
  line-height: 1.7;
  color: var(--blue);
}

.page-about .rhythm-text {
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(16, 24, 32, 0.78);
}

/* ---------- 家庭观赛 ---------- */
.page-about .screens {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin-bottom: 6px;
}

.page-about .screen {
  padding: 18px 16px 16px;
  background: #fff;
  border: var(--rule);
  border-top: 3px solid var(--cyan);
}

.page-about .screen-name {
  margin: 0;
  font-size: 15px;
  font-weight: 800;
}

.page-about .screen-desc {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(16, 24, 32, 0.74);
}

/* ---------- 合作生态深色板 ---------- */
.page-about .about-panel {
  background: var(--deep);
  color: var(--paper);
  padding: clamp(22px, 3.6vw, 40px);
  border-left: 4px solid var(--orange);
}

.page-about .section-num--dark {
  background: transparent;
  border-color: var(--rule-dark);
  color: var(--orange);
}

.page-about .about-panel .section-title {
  color: var(--paper);
}

.page-about .about-lede--dark {
  color: rgba(245, 247, 248, 0.78);
}

.page-about .partner-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
}

.page-about .partner-card {
  padding: 16px 14px 14px;
  background: rgba(245, 247, 248, 0.06);
  border: var(--rule-dark);
}

.page-about .partner-num {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(24px, 3.4vw, 32px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-about .partner-label {
  display: block;
  margin-top: 8px;
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-about .sub-title--dark {
  color: var(--paper);
}

.page-about .collab-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(245, 247, 248, 0.82);
}

.page-about .collab-list li {
  position: relative;
  padding-left: 16px;
}

.page-about .collab-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 2px;
  background: var(--orange);
}

.page-about .collab-list strong {
  color: #fff;
  font-weight: 700;
}

/* ---------- 案例 ---------- */
.page-about .case-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 16px;
}

.page-about .case-card {
  padding: 18px 18px 20px;
  background: #fff;
  border: var(--rule);
  box-shadow: var(--shadow-card);
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease);
}

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

.page-about .case-cat {
  display: block;
  padding-bottom: 9px;
  border-bottom: var(--rule);
  font-family: var(--font-num);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--blue);
}

.page-about .case-desc {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.78;
  color: rgba(16, 24, 32, 0.76);
}

.page-about .case-note {
  max-width: 34em;
  margin: 20px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(16, 24, 32, 0.72);
}

.page-about .about-link {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid var(--mist);
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-about .about-link:hover {
  color: var(--orange);
  border-color: var(--orange);
}

/* ---------- 结尾行动区 ---------- */
.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 32px;
  padding: clamp(20px, 3vw, 28px);
  background: linear-gradient(120deg, var(--blue), var(--deep));
  color: var(--paper);
}

.page-about .cta-line {
  flex: 1 1 260px;
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(245, 247, 248, 0.9);
}

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

.page-about .cta-actions .btn {
  flex: 1 1 auto;
  text-align: center;
}

/* ---------- 桌面布局 ---------- */
@media (min-width: 700px) {
  .page-about .hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .rhythm li {
    grid-template-columns: 116px minmax(0, 1fr);
  }

  .page-about .tl {
    padding-left: 30px;
  }

  .page-about .tl-more {
    max-height: 0;
    margin-top: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.35s var(--ease), opacity 0.3s var(--ease), margin-top 0.3s var(--ease);
  }

  .page-about .tl-node:hover .tl-more,
  .page-about .tl-node:focus-within .tl-more {
    max-height: 260px;
    margin-top: 8px;
    opacity: 1;
  }
}

@media (min-width: 1000px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 52px;
    align-items: end;
  }

  .page-about .about-layout {
    display: grid;
    grid-template-columns: 188px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: calc(var(--header-h-solid) + 20px);
    margin-bottom: 0;
    padding: 0;
    border-top: 0;
    border-bottom: 0;
    border-right: var(--rule);
    padding-right: 18px;
  }

  .page-about .index-list {
    flex-direction: column;
    gap: 10px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .index-link {
    white-space: normal;
    font-size: 13.5px;
    line-height: 1.6;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .biz-card,
  .page-about .case-card,
  .page-about .tl-more {
    transition: none;
  }
}