.page-about {
  overflow-x: hidden;
}

/* ===== Hero ===== */
.page-about .about-hero {
  position: relative;
  padding: calc(var(--section-space) * 0.45) 0 var(--section-space);
  overflow: hidden;
}
.page-about .about-hero::before {
  content: '';
  position: absolute;
  top: -18%;
  right: -6%;
  width: 480px;
  height: 480px;
  background: radial-gradient(circle, rgba(191, 95, 255, 0.22), transparent 62%);
  pointer-events: none;
}
.page-about .about-hero::after {
  content: '';
  position: absolute;
  bottom: -10%;
  right: 24%;
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(0, 255, 178, 0.1), transparent 60%);
  pointer-events: none;
}
.page-about .about-hero .container {
  position: relative;
  z-index: 1;
}
.page-about .hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  align-items: end;
  padding-top: 36px;
}
.page-about .hero-copy {
  max-width: 780px;
}
.page-about .about-title {
  font-family: var(--font-display);
  font-size: clamp(30px, 4.6vw, 56px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 16px 0 20px;
  color: var(--color-white);
}
.page-about .hero-lead {
  font-size: clamp(15px, 1.5vw, 18px);
  line-height: 1.75;
  color: var(--color-muted);
  max-width: 640px;
}
.page-about .hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}
.page-about .hero-art {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-end;
  min-height: 200px;
}
.page-about .hero-art-number {
  font-family: var(--font-display);
  font-size: clamp(80px, 12vw, 120px);
  font-weight: 800;
  line-height: 0.85;
  background: linear-gradient(135deg, var(--color-neon), var(--color-purple));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.page-about .hero-art-line {
  width: 80px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-neon), transparent);
  margin: 14px 0;
}
.page-about .hero-art-text {
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--color-muted);
  text-transform: uppercase;
  line-height: 1.7;
}

/* ===== 章节通用 ===== */
.page-about .about-chapter {
  border-top: 1px solid rgba(29, 44, 79, 0.5);
}
.page-about .chapter-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}
.page-about .chapter-index {
  display: flex;
  align-items: baseline;
  gap: 10px;
}
.page-about .chapter-no {
  font-family: var(--font-display);
  font-size: 72px;
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.04em;
  color: transparent;
  -webkit-text-stroke: 1px var(--color-neon);
}
.page-about .chapter-caption {
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-muted);
}
.page-about .chapter-body {
  min-width: 0;
}
.page-about .chapter-body h2 {
  font-size: clamp(27px, 3vw, 40px);
  line-height: 1.2;
  margin: 10px 0 20px;
  color: var(--color-white);
}
.page-about .chapter-body > p {
  color: var(--color-muted);
  line-height: 1.8;
  font-size: 16px;
}
.page-about .chapter-prose {
  max-width: 720px;
}
.page-about .chapter-prose p {
  margin-bottom: 16px;
}

/* ===== 01 品牌起源 ===== */
.page-about .origin-figure {
  margin: 28px 0 0;
  max-width: 400px;
}
.page-about .origin-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-bg-elevated);
}
.page-about .origin-figure figcaption {
  margin-top: 12px;
}

/* ===== 02 产品线 ===== */
.page-about .lineup-intro {
  max-width: 720px;
}
.page-about .product-stack {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 28px 0 0;
}
.page-about .product-card {
  position: relative;
  background: linear-gradient(145deg, var(--color-bg-card), var(--color-bg-deep));
  border: 1px solid var(--color-bg-elevated);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  transition: transform var(--ease), border-color var(--ease), box-shadow var(--ease);
}
.page-about .product-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-neon);
  box-shadow: var(--shadow-glow-green);
}
.page-about .product-card-title {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.page-about .product-card-title svg {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  color: var(--color-neon);
}
.page-about .product-card:nth-child(2) .product-card-title svg {
  color: var(--color-purple);
}
.page-about .product-card:nth-child(4) .product-card-title svg {
  color: var(--color-purple);
}
.page-about .product-card-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-muted);
}
.page-about .product-figure {
  margin: 40px auto 0;
  max-width: 520px;
}
.page-about .product-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(191, 95, 255, 0.2);
}
.page-about .product-figure figcaption {
  margin-top: 12px;
}
.page-about .lineup-note {
  max-width: 720px;
  margin-top: 24px;
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
}
.page-about .lineup-note a {
  color: var(--color-neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 255, 178, 0.3);
  transition: border-color var(--ease), color var(--ease);
}
.page-about .lineup-note a:hover {
  border-bottom-color: var(--color-neon);
  color: var(--color-white);
}

/* ===== 03 里程碑 ===== */
.page-about .milestones-intro {
  max-width: 720px;
}
.page-about .timeline {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 36px 0 0;
}
.page-about .milestone {
  position: relative;
  background: linear-gradient(150deg, rgba(17, 26, 58, 0.92), rgba(6, 10, 31, 0.96));
  border: 1px solid rgba(0, 255, 178, 0.15);
  border-radius: var(--radius-md);
  padding: 22px 20px;
  transform: skewX(-2deg);
  transition: transform var(--ease), border-color var(--ease), box-shadow var(--ease);
}
.page-about .milestone:hover {
  transform: skewX(-2deg) translateY(-4px);
  border-color: var(--color-neon);
  box-shadow: var(--shadow-glow-green);
}
.page-about .milestone-year {
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  color: var(--color-neon);
  display: block;
  margin-bottom: 8px;
}
.page-about .milestone-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 6px;
  display: block;
}
.page-about .milestone-desc {
  font-size: 13px;
  line-height: 1.65;
  color: var(--color-muted);
}

/* ===== 04 规模与认可 ===== */
.page-about .scale-intro {
  max-width: 720px;
}
.page-about .scale-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin: 32px 0;
}
.page-about .scale-card {
  background:
    radial-gradient(circle at 80% 20%, rgba(255, 200, 87, 0.16), transparent 55%),
    linear-gradient(145deg, var(--color-bg-card), var(--color-bg-deep));
  border: 1px solid rgba(255, 200, 87, 0.22);
  border-radius: var(--radius-lg);
  padding: 26px 14px;
  text-align: center;
  transition: border-color var(--ease), box-shadow var(--ease);
}
.page-about .scale-card:hover {
  border-color: var(--color-gold);
  box-shadow: 0 0 18px rgba(255, 200, 87, 0.14);
}
.page-about .scale-num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 3.8vw, 46px);
  font-weight: 700;
  color: var(--color-gold);
  line-height: 1.1;
  display: block;
}
.page-about .scale-label {
  font-size: 13px;
  color: var(--color-muted);
  margin-top: 8px;
  display: block;
}
.page-about .honor-wrap {
  display: grid;
  gap: 32px;
  margin-top: 32px;
}
.page-about .honor-list {
  display: grid;
  gap: 12px;
}
.page-about .honor-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-bg-elevated);
  border-radius: var(--radius-md);
  transition: border-color var(--ease), background var(--ease);
}
.page-about .honor-item:hover {
  border-color: var(--color-purple);
  background: var(--color-bg-elevated);
}
.page-about .honor-icon {
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(191, 95, 255, 0.12);
  color: var(--color-purple);
  flex-shrink: 0;
}
.page-about .honor-icon svg {
  width: 18px;
  height: 18px;
}
.page-about .honor-text {
  font-size: 14px;
  line-height: 1.5;
  color: var(--color-white);
}
.page-about .honor-text small {
  display: block;
  color: var(--color-muted);
  font-size: 12px;
  margin-top: 2px;
}
.page-about .chart-figure {
  margin: 0;
}
.page-about .chart-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-bg-elevated);
}
.page-about .chart-figure figcaption {
  margin-top: 12px;
}

/* ===== 05 焕新理念 ===== */
.page-about .renewal-intro {
  max-width: 720px;
}
.page-about .principle-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 28px 0;
}
.page-about .principle {
  position: relative;
  background: linear-gradient(145deg, var(--color-bg-card), var(--color-bg-deep));
  border: 1px solid var(--color-bg-elevated);
  border-left: 3px solid var(--color-neon);
  border-radius: var(--radius-md);
  padding: 20px 18px 20px 20px;
  transition: border-color var(--ease), background var(--ease);
}
.page-about .principle:hover {
  background: var(--color-bg-elevated);
  border-color: rgba(0, 255, 178, 0.3);
}
.page-about .principle-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.page-about .principle-title::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--color-neon);
  border-radius: 50%;
  flex-shrink: 0;
}
.page-about .principle:nth-child(3) .principle-title::before {
  background: var(--color-purple);
}
.page-about .principle-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-muted);
}
.page-about .renewal-box {
  margin-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  align-items: flex-start;
  padding: 22px 24px;
  background: rgba(0, 255, 178, 0.06);
  border: 1px solid rgba(0, 255, 178, 0.14);
  border-radius: var(--radius-md);
}
.page-about .renewal-box p {
  margin: 0;
  color: var(--color-muted);
  font-size: 14px;
  line-height: 1.75;
}
.page-about .renewal-box strong {
  color: var(--color-neon);
  font-weight: 700;
}
.page-about .renewal-box a {
  color: var(--color-neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 255, 178, 0.3);
  transition: border-color var(--ease), color var(--ease);
}
.page-about .renewal-box a:hover {
  border-bottom-color: var(--color-neon);
  color: var(--color-white);
}

/* ===== 合作生态 ===== */
.page-about .about-ecosystem {
  border-top: 1px solid rgba(29, 44, 79, 0.5);
}
.page-about .ecosystem-head {
  max-width: 680px;
  margin-bottom: 30px;
}
.page-about .ecosystem-head p {
  color: var(--color-muted);
  line-height: 1.8;
  font-size: 15px;
}
.page-about .ecosystem-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.page-about .eco-node {
  background: linear-gradient(160deg, rgba(11, 20, 55, 0.6), rgba(6, 10, 31, 0.92));
  border: 1px solid rgba(191, 95, 255, 0.2);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  transition: border-color var(--ease), box-shadow var(--ease);
}
.page-about .eco-node:hover {
  border-color: var(--color-purple);
  box-shadow: 0 0 22px rgba(191, 95, 255, 0.15);
}
.page-about .eco-node-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.page-about .eco-node-title svg {
  width: 20px;
  height: 20px;
  color: var(--color-neon);
  flex-shrink: 0;
}
.page-about .eco-node:nth-child(2) .eco-node-title svg {
  color: var(--color-purple);
}
.page-about .eco-node-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 8px;
}
.page-about .eco-node-item {
  font-size: 14px;
  color: var(--color-muted);
  display: flex;
  align-items: center;
  gap: 8px;
  line-height: 1.5;
}
.page-about .eco-node-item::before {
  content: '◆';
  font-size: 8px;
  color: var(--color-gold);
}
.page-about .ecosystem-cta {
  margin-top: 32px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
  padding: 20px 22px;
  background: rgba(191, 95, 255, 0.05);
  border: 1px solid rgba(191, 95, 255, 0.14);
  border-radius: var(--radius-md);
}
.page-about .ecosystem-cta p {
  margin: 0;
  color: var(--color-muted);
  font-size: 14px;
  line-height: 1.7;
  flex: 1;
  min-width: 200px;
}
.page-about .ecosystem-cta a {
  color: var(--color-purple);
  text-decoration: none;
  border-bottom: 1px solid rgba(191, 95, 255, 0.3);
  transition: border-color var(--ease), color var(--ease);
}
.page-about .ecosystem-cta a:hover {
  border-bottom-color: var(--color-purple);
  color: var(--color-white);
}

/* ===== 图片通用 ===== */
.page-about img {
  max-width: 100%;
  height: auto;
  display: block;
}
.page-about .media-frame {
  background: var(--color-bg-deep);
}

/* ===== 桌面端增强 ===== */
@media (min-width: 768px) {
  .page-about .product-stack {
    grid-template-columns: 1fr 1fr;
    gap: 18px;
    padding: 30px 0;
  }
  .page-about .product-card:nth-child(2) {
    transform: translateY(22px);
  }
  .page-about .product-card:nth-child(4) {
    transform: translateY(-22px);
  }
  .page-about .product-card:hover {
    transform: translateY(-4px);
  }
  .page-about .product-card:nth-child(2):hover {
    transform: translateY(18px);
  }
  .page-about .product-card:nth-child(4):hover {
    transform: translateY(-26px);
  }
  .page-about .principle-list {
    grid-template-columns: 1fr 1fr;
    gap: 18px;
  }
}
@media (min-width: 992px) {
  .page-about .hero-grid {
    grid-template-columns: 7fr 3fr;
    gap: 48px;
    padding-top: 42px;
  }
  .page-about .chapter-inner {
    grid-template-columns: 180px 1fr;
    gap: 48px;
  }
  .page-about .chapter-index {
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    padding-top: 8px;
    gap: 8px;
  }
  .page-about .chapter-caption {
    writing-mode: vertical-rl;
    font-size: 12px;
  }
  .page-about .scale-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
  }
  .page-about .honor-wrap {
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 48px;
  }
  .page-about .timeline {
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    padding: 28px 0;
  }
  .page-about .timeline::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 4%;
    right: 4%;
    height: 2px;
    background: linear-gradient(90deg, var(--color-neon), var(--color-purple), var(--color-gold));
    opacity: 0.22;
    transform: skewY(-2deg);
    pointer-events: none;
  }
  .page-about .ecosystem-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }
  .page-about .ecosystem-cta {
    flex-wrap: nowrap;
    padding: 22px 28px;
  }
}

/* 移动端时间轴竖线 */
@media (max-width: 991px) {
  .page-about .timeline {
    padding-left: 24px;
  }
  .page-about .timeline::before {
    content: '';
    position: absolute;
    left: 6px;
    top: 10px;
    bottom: 10px;
    width: 2px;
    background: linear-gradient(180deg, var(--color-neon), var(--color-purple));
    opacity: 0.18;
    pointer-events: none;
  }
  .page-about .milestone::after {
    content: '';
    position: absolute;
    left: -24px;
    top: 24px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-neon);
    box-shadow: 0 0 8px rgba(0, 255, 178, 0.65);
  }
}