/* 品牌档案页专属样式 - 作用域 .page-about */
.page-about {
  --about-index-w: 160px;
}

.page-about .about-layout {
  position: relative;
  background: var(--color-bg);
}

/* 移动端：章节索引水平条 */
.page-about .about-index {
  position: sticky;
  top: var(--header-h-m);
  z-index: 60;
  background: rgba(6, 11, 28, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-line);
}

.page-about .about-index-track {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
}

.page-about .about-index-caption {
  display: none;
}

.page-about .about-index-nav {
  display: flex;
  gap: 4px;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-index-nav::-webkit-scrollbar {
  display: none;
}

.page-about .about-index-link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 10px;
  border-radius: 3px;
  border: 1px solid transparent;
  color: var(--color-dim);
  font-size: 12px;
  font-family: var(--font-head);
  text-decoration: none;
  transition: color var(--t-fast), border-color var(--t-fast), background var(--t-fast);
}

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

.page-about .about-index-link[data-active] {
  color: var(--color-neon);
  border-color: rgba(0, 255, 135, 0.4);
  background: rgba(0, 255, 135, 0.08);
}

.page-about .about-index-link[data-active] .about-index-num {
  text-shadow: var(--glow-neon);
}

.page-about .about-index-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 14px;
  line-height: 1;
}

.page-about .about-index-name {
  white-space: nowrap;
}

.page-about .about-index-foot {
  display: none;
}

.page-about .about-main {
  min-width: 0;
}

.page-about .about-chapter {
  position: relative;
  padding: 40px 16px;
  border-bottom: 1px solid var(--color-line);
  scroll-margin-top: 112px;
}

/* 首屏 */
.page-about .about-hero {
  position: relative;
  min-height: 460px;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  background: var(--color-bg-black);
  border: 1px solid var(--color-line);
  border-radius: 3px;
  padding: 0;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-neon) 0%, rgba(0, 255, 135, 0) 70%);
  z-index: 4;
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: 12px;
  top: 12px;
  width: 18px;
  height: 18px;
  border-right: 2px solid var(--color-orange);
  border-top: 2px solid var(--color-orange);
  z-index: 4;
  pointer-events: none;
}

.page-about .about-hero-media {
  position: absolute;
  inset: 0;
}

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

.page-about .about-hero-shade {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6, 11, 28, 0.45) 0%, rgba(6, 11, 28, 0.65) 55%, rgba(6, 11, 28, 0.96) 100%);
}

.page-about .about-hero-body {
  position: relative;
  z-index: 3;
  width: 100%;
  padding: 28px 16px 32px;
}

.page-about .about-hero-bignum {
  position: absolute;
  right: -6px;
  bottom: -18px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(130px, 30vw, 240px);
  line-height: 1;
  color: rgba(0, 255, 135, 0.045);
  z-index: 1;
  pointer-events: none;
  letter-spacing: -0.04em;
}

.page-about .about-hero-kicker {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-neon);
  border: 1px solid rgba(0, 255, 135, 0.4);
  padding: 4px 10px;
  border-radius: 2px;
  background: rgba(0, 255, 135, 0.08);
  margin-bottom: 14px;
}

.page-about .about-hero-body h1 {
  font-size: clamp(26px, 6vw, 52px);
  line-height: 1.12;
  font-weight: 900;
  letter-spacing: -0.02em;
  margin: 0 0 12px;
  color: var(--color-text);
}

.page-about .about-hero-lead {
  font-size: 15px;
  line-height: 1.75;
  color: var(--color-dim);
  max-width: 560px;
  margin: 0 0 12px;
}

.page-about .about-hero-tagline {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--color-faint);
  border-left: 2px solid var(--color-orange);
  background: rgba(255, 107, 53, 0.06);
  padding: 8px 12px;
  margin: 0 0 18px;
  max-width: 560px;
}

.page-about .about-em {
  color: var(--color-neon);
  font-weight: 700;
}

.page-about .about-hero-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin: 0 0 20px;
  max-width: 560px;
}

.page-about .about-hero-stat {
  background: rgba(6, 11, 28, 0.55);
  border: 1px solid var(--color-line);
  border-left: 2px solid var(--color-neon);
  padding: 12px 14px;
  backdrop-filter: blur(4px);
}

.page-about .about-hero-stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  color: var(--color-neon);
  line-height: 1.2;
}

.page-about .about-hero-stat-label {
  display: block;
  font-size: 12px;
  color: var(--color-dim);
  margin-top: 2px;
}

.page-about .about-hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.page-about .about-hero-cta .btn {
  font-size: 13px;
  padding: 10px 18px;
}

/* 章节标题 */
.page-about .about-chapter-head {
  position: relative;
  padding-bottom: 14px;
  margin-bottom: 18px;
}

.page-about .about-chapter-head::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 44px;
  height: 2px;
  background: var(--color-neon);
  transform: skewX(-24deg);
  box-shadow: var(--glow-neon);
}

.page-about .about-chapter-num {
  display: block;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(44px, 9vw, 72px);
  line-height: 1;
  color: var(--color-neon);
  opacity: 0.9;
  text-shadow: var(--glow-neon);
  letter-spacing: -0.03em;
}

.page-about .about-chapter-head h2 {
  font-size: clamp(20px, 4vw, 30px);
  font-weight: 800;
  letter-spacing: -0.01em;
  margin: 6px 0 0;
  color: var(--color-text);
}

.page-about .about-chapter-intro {
  margin-bottom: 8px;
  color: var(--color-dim);
  line-height: 1.7;
  font-size: 14px;
  max-width: 560px;
}

/* 时间线 */
.page-about .about-timeline {
  margin: 24px 0 0;
  padding-left: 10px;
}

.page-about .about-timeline-item {
  position: relative;
  margin-bottom: 18px;
  padding-left: 22px;
}

.page-about .about-timeline-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-neon);
  border: 2px solid var(--color-bg);
  box-shadow: 0 0 12px rgba(0, 255, 135, 0.45);
  box-sizing: border-box;
  transition: box-shadow 0.25s ease, transform 0.25s ease;
}

.page-about .about-timeline-item:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 28px;
  bottom: -6px;
  width: 1px;
  background: linear-gradient(180deg, rgba(0, 255, 135, 0.5), rgba(0, 255, 135, 0.12));
}

.page-about [data-chapter][data-active] .about-timeline-item::before {
  box-shadow: 0 0 0 5px rgba(0, 255, 135, 0.18), var(--glow-neon);
  transform: scale(1.1);
}

.page-about .about-timeline-year {
  display: inline-flex;
  align-items: center;
  padding: 4px 16px 4px 10px;
  background: var(--color-neon);
  color: var(--color-bg-black);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 13px;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 50%, calc(100% - 10px) 100%, 0 100%);
  margin-bottom: 10px;
}

.page-about .about-timeline-card {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-line);
  border-radius: 3px;
  padding: 16px 18px;
  position: relative;
  overflow: hidden;
  transition: border-color var(--t-base), box-shadow var(--t-base), transform var(--t-base);
}

.page-about .about-timeline-card::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 28px;
  height: 100%;
  background: linear-gradient(160deg, rgba(0, 255, 135, 0.08), rgba(0, 255, 135, 0) 60%);
  clip-path: polygon(100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-about .about-timeline-card:hover {
  transform: translateY(-2px);
  border-color: rgba(0, 255, 135, 0.45);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.page-about .about-timeline-card h3 {
  font-size: 16px;
  font-weight: 800;
  margin: 0 0 8px;
  color: var(--color-text);
}

.page-about .about-timeline-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-dim);
}

.page-about .about-milestones-note {
  margin-top: 18px;
  padding: 12px 14px;
  border-left: 2px solid var(--color-orange);
  background: rgba(255, 107, 53, 0.05);
  color: var(--color-dim);
  font-size: 13px;
  line-height: 1.6;
}

.page-about .about-milestones-note p {
  margin: 0;
}

/* 团队 */
.page-about .about-team-media {
  border-radius: 3px;
  overflow: hidden;
  border: 1px solid var(--color-line);
  margin-bottom: 16px;
}

.page-about .about-team-media img {
  width: 100%;
  height: auto;
  display: block;
}

.page-about .about-team-desc {
  color: var(--color-dim);
  line-height: 1.7;
  font-size: 14px;
  margin-bottom: 20px;
}

.page-about .about-team-desc p {
  margin: 0;
}

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

.page-about .about-team-card {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-line);
  border-radius: 3px;
  padding: 18px;
  transition: transform var(--t-base), border-color var(--t-base), box-shadow var(--t-base);
}

.page-about .about-team-card:hover {
  transform: translateY(-3px);
  border-color: rgba(0, 255, 135, 0.45);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

.page-about .about-team-avatar {
  display: inline-flex;
  width: 48px;
  height: 48px;
  margin-bottom: 12px;
  border-radius: 4px;
  overflow: hidden;
}

.page-about .about-team-avatar svg {
  display: block;
}

.page-about .about-team-card h3 {
  font-size: 15px;
  font-weight: 800;
  margin: 0 0 8px;
  color: var(--color-text);
}

.page-about .about-team-card p {
  margin: 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--color-dim);
}

.page-about .about-team-extra {
  margin-top: 12px !important;
  padding-top: 10px;
  border-top: 1px dashed rgba(0, 255, 135, 0.2);
  font-family: var(--font-mono);
  font-size: 11px !important;
  color: var(--color-neon) !important;
  line-height: 1.5;
}

/* 技术架构 */
.page-about .about-tech-feature {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-about .about-tech-media {
  border-radius: 3px;
  overflow: hidden;
  border: 1px solid var(--color-line);
}

.page-about .about-tech-media img {
  width: 100%;
  height: auto;
  display: block;
}

.page-about .about-tech-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-bottom: 16px;
}

.page-about .about-tech-stat {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-line);
  border-radius: 3px;
  padding: 14px 16px;
}

.page-about .about-tech-stat:hover {
  border-color: rgba(0, 255, 135, 0.35);
}

.page-about .about-tech-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  color: var(--color-neon);
  line-height: 1.2;
}

.page-about .about-tech-label {
  display: block;
  font-size: 12px;
  color: var(--color-dim);
  margin-top: 4px;
}

.page-about .about-tech-body p {
  color: var(--color-dim);
  font-size: 14px;
  line-height: 1.7;
  margin: 0 0 16px;
}

.page-about .about-tech-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-tech-item {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-neon);
  background: rgba(0, 255, 135, 0.06);
  border: 1px solid rgba(0, 255, 135, 0.3);
  border-radius: 2px;
  padding: 6px 10px;
}

/* 服务理念 */
.page-about .about-service-copy {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-about .about-service-text p {
  margin: 0 0 14px;
  color: var(--color-dim);
  line-height: 1.75;
  font-size: 14px;
}

.page-about .about-service-panel {
  position: relative;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-line);
  border-radius: 4px;
  padding: 22px 20px 20px;
}

.page-about .about-service-panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 44px;
  height: 3px;
  background: var(--color-neon);
  box-shadow: var(--glow-neon);
}

.page-about .about-service-panel h3 {
  margin: 0 0 12px;
  font-size: 16px;
  font-weight: 800;
  color: var(--color-text);
}

.page-about .about-service-list {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .about-service-list li {
  position: relative;
  padding-left: 18px;
  color: var(--color-dim);
  font-size: 13px;
  line-height: 1.6;
}

.page-about .about-service-list li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--color-neon);
}

.page-about .about-service-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-service-links .btn {
  font-size: 13px;
  padding: 10px 18px;
}

.page-about .about-service-footnote {
  grid-column: 1 / -1;
  margin: 0;
  color: var(--color-faint);
  font-size: 13px;
}

.page-about .about-service-footnote a {
  color: var(--color-neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 255, 135, 0.3);
}

/* 平板 */
@media (min-width: 600px) {
  .page-about .about-hero-stats {
    grid-template-columns: repeat(4, 1fr);
  }

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

/* 桌面 */
@media (min-width: 900px) {
  .page-about .about-layout {
    display: grid;
    grid-template-columns: var(--about-index-w) minmax(0, 1fr);
    max-width: var(--shell-width);
    margin: 0 auto;
    padding: 0 24px;
  }

  .page-about .about-index {
    top: calc(var(--header-h) + 12px);
    height: calc(100vh - var(--header-h) - 12px);
    align-self: start;
    background: transparent;
    backdrop-filter: none;
    border-bottom: none;
    padding: 28px 18px 18px 0;
    box-sizing: border-box;
  }

  .page-about .about-index-track {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0;
    height: 100%;
    justify-content: space-between;
  }

  .page-about .about-index-caption {
    display: block;
    font-family: var(--font-head);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--color-faint);
    margin-bottom: 18px;
  }

  .page-about .about-index-nav {
    flex-direction: column;
    gap: 0;
    overflow: visible;
  }

  .page-about .about-index-link {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding: 16px 8px 16px 14px;
    border: none;
    border-left: 2px solid var(--color-line);
    border-radius: 0;
    font-size: 13px;
    white-space: normal;
  }

  .page-about .about-index-link:hover {
    background: rgba(0, 255, 135, 0.03);
    border-left-color: var(--color-faint);
  }

  .page-about .about-index-link[data-active] {
    border-left-color: var(--color-neon);
    background: linear-gradient(90deg, rgba(0, 255, 135, 0.08), transparent);
    color: var(--color-neon);
  }

  .page-about .about-index-num {
    font-size: 28px;
    line-height: 1;
  }

  .page-about .about-index-name {
    white-space: normal;
    line-height: 1.3;
    font-size: 12px;
  }

  .page-about .about-index-link[data-active] .about-index-name {
    color: var(--color-neon);
  }

  .page-about .about-index-foot {
    display: block;
  }

  .page-about .about-index-line {
    display: block;
    width: 32px;
    height: 2px;
    background: var(--color-orange);
    margin-bottom: 8px;
    transform: skewX(-24deg);
  }

  .page-about .about-index-since {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--color-faint);
    letter-spacing: 0.1em;
  }

  .page-about .about-main {
    padding-left: 40px;
  }

  .page-about .about-chapter {
    padding: 64px 0;
    scroll-margin-top: calc(var(--header-h) + 12px);
  }

  .page-about .about-hero {
    min-height: 520px;
  }

  .page-about .about-hero-body {
    padding: 36px 40px 40px;
  }

  .page-about .about-hero-body h1 {
    font-size: 48px;
  }

  .page-about .about-hero-lead {
    font-size: 16px;
    max-width: 600px;
  }

  .page-about .about-timeline-item {
    padding-left: 28px;
  }

  .page-about .about-timeline-card h3 {
    font-size: 17px;
  }

  .page-about .about-team-grid {
    gap: 16px;
  }

  .page-about .about-tech-feature {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    align-items: center;
    gap: 28px;
  }

  .page-about .about-tech-body {
    margin-top: 0;
  }

  .page-about .about-service-copy {
    grid-template-columns: 1fr 360px;
    align-items: start;
    gap: 28px;
  }

  .page-about .about-service-panel {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }
}

/* 大屏微调 */
@media (min-width: 1200px) {
  .page-about .about-hero-body h1 {
    font-size: 56px;
  }
}

/* 减少动态效果 */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-timeline-card,
  .page-about .about-team-card,
  .page-about .about-index-link,
  .page-about .about-timeline-item::before {
    transition: none !important;
  }
}