.page-about {
  --about-gap: clamp(20px, 4vw, 48px);
  --about-grid-line: rgba(255, 255, 255, 0.035);
  background:
    radial-gradient(circle at 10% 30%, rgba(255, 0, 255, 0.05), transparent 22%),
    radial-gradient(circle at 90% 70%, rgba(0, 229, 255, 0.04), transparent 28%),
    var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about .pabout-container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.page-about section {
  padding-block: clamp(56px, 8vw, 120px);
}

.page-about h1,
.page-about h2 {
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -0.02em;
}

.page-about h2 {
  font-size: clamp(28px, 4vw, 48px);
  margin-bottom: 16px;
}

.page-about h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: 0.01em;
}

.page-about p {
  line-height: 1.8;
  color: var(--color-text);
}

.page-about .pabout-eyebrow {
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

/* ===== 章节编号标记 ===== */
.page-about .pabout-section-marker {
  display: inline-flex;
  align-items: flex-end;
  gap: 10px;
  margin-bottom: 24px;
  font-family: var(--font-mono);
}

.page-about .pabout-section-marker--light {
  filter: drop-shadow(0 0 8px rgba(255, 0, 255, 0.2));
}

.page-about .pabout-marker__num {
  font-size: clamp(30px, 4vw, 44px);
  font-weight: 900;
  line-height: 0.9;
  color: var(--color-primary);
  opacity: 0.72;
}

.page-about .pabout-marker__label {
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--color-muted);
  text-transform: uppercase;
  padding-bottom: 4px;
}

/* ===== Hero 首屏 ===== */
.page-about .pabout-hero {
  position: relative;
  padding-top: clamp(32px, 6vw, 72px);
  background:
    linear-gradient(180deg, rgba(255, 0, 255, 0.08), transparent 26%),
    linear-gradient(90deg, rgba(0, 229, 255, 0.03) 1px, transparent 1px),
    linear-gradient(rgba(0, 229, 255, 0.03) 1px, transparent 1px);
  background-size: auto, 48px 48px, 48px 48px;
}

.page-about .pabout-hero .breadcrumb {
  margin-bottom: clamp(32px, 6vw, 64px);
}

.page-about .pabout-hero__layout {
  display: grid;
  gap: clamp(28px, 5vw, 64px);
  align-items: center;
}

.page-about .pabout-hero__content {
  position: relative;
  z-index: 2;
}

.page-about .pabout-hero__kicker {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--color-cyan);
  border: 1px solid rgba(0, 229, 255, 0.35);
  border-radius: var(--radius-pill);
  padding: 8px 16px;
  margin-bottom: 24px;
  background: rgba(0, 229, 255, 0.04);
}

.page-about .pabout-hero__title {
  font-size: clamp(36px, 6vw, 72px);
  text-shadow: 0 0 30px rgba(255, 0, 255, 0.35), 0 0 60px rgba(255, 0, 255, 0.15);
  margin-bottom: 28px;
}

.page-about .pabout-hero__lead {
  max-width: 640px;
  font-size: 16px;
  color: var(--color-muted);
  border-left: 2px solid rgba(255, 0, 255, 0.6);
  padding-left: 20px;
}

.page-about .pabout-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.page-about .pabout-hero__visual {
  position: relative;
  margin: 0;
  z-index: 1;
}

.page-about .pabout-hero__visual::after {
  content: "";
  position: absolute;
  inset: 14px -14px -14px 14px;
  border: 1px solid rgba(255, 0, 255, 0.4);
  border-radius: var(--radius-lg);
  pointer-events: none;
}

.page-about .pabout-hero__visual img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
}

/* ===== 初心与使命 ===== */
.page-about .pabout-mission__layout {
  display: grid;
  gap: var(--about-gap);
}

.page-about .pabout-mission__text p + p {
  margin-top: 18px;
}

.page-about .pabout-lead {
  font-size: 18px;
  color: var(--color-text);
  border-bottom: 1px solid rgba(255, 0, 255, 0.2);
  padding-bottom: 20px;
  margin-bottom: 16px;
}

.page-about .pabout-mission__aside {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-about .pabout-mission__facts {
  display: grid;
  gap: 16px;
}

.page-about .pabout-mission__card {
  background: linear-gradient(135deg, var(--color-bg-raised), var(--color-panel));
  border: 1px solid rgba(0, 229, 255, 0.12);
  border-radius: var(--radius-md);
  padding: 22px 24px;
  transition: border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}

.page-about .pabout-mission__card:hover {
  border-color: var(--color-primary);
  transform: rotate(-1.5deg) scale(1.02);
  box-shadow: 0 12px 30px rgba(255, 0, 255, 0.1);
}

.page-about .pabout-mission__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 700;
  color: var(--color-cyan);
  line-height: 1.1;
}

.page-about .pabout-mission__label {
  display: block;
  margin-top: 6px;
  color: var(--color-muted);
  font-size: 14px;
  line-height: 1.5;
}

.page-about .pabout-mission__note {
  margin-top: 8px;
  padding-left: 16px;
  border-left: 2px solid var(--color-cyan);
  color: var(--color-muted);
  font-size: 14px;
  line-height: 1.8;
}

/* ===== 关键里程碑 / 时间轴 ===== */
.page-about .pabout-timeline {
  background:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  position: relative;
}

.page-about .pabout-timeline__head {
  margin-bottom: 40px;
  max-width: 680px;
}

.page-about .pabout-timeline__head p:last-child {
  color: var(--color-muted);
}

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

.page-about .pabout-timeline__track::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 7px;
  width: 2px;
  background: linear-gradient(180deg, var(--color-primary), var(--color-cyan));
  opacity: 0.35;
}

.page-about .pabout-timeline__item {
  position: relative;
  padding: 0 0 48px 44px;
}

.page-about .pabout-timeline__item:last-child {
  padding-bottom: 0;
}

.page-about .pabout-timeline__item::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-primary);
  box-shadow: 0 0 10px rgba(255, 0, 255, 0.8);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.page-about .pabout-timeline__item:hover::before {
  transform: scale(1.3);
  box-shadow: 0 0 0 6px rgba(255, 0, 255, 0.15), 0 0 18px rgba(255, 0, 255, 0.9);
}

.page-about .pabout-timeline__time {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-cyan);
  margin-bottom: 10px;
}

.page-about .pabout-timeline__panel {
  background: linear-gradient(135deg, rgba(19, 19, 32, 0.75), rgba(28, 28, 42, 0.9));
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  padding: 24px 26px;
  transition: border-color 0.25s ease, background 0.25s ease;
}

.page-about .pabout-timeline__item:hover .pabout-timeline__panel {
  border-color: rgba(0, 229, 255, 0.25);
  background: linear-gradient(135deg, rgba(19, 19, 32, 0.95), rgba(28, 28, 42, 1));
}

.page-about .pabout-timeline__panel h3 {
  color: var(--color-text);
}

.page-about .pabout-timeline__panel p {
  color: var(--color-muted);
  font-size: 15px;
  margin-bottom: 0;
}

/* ===== 技术架构 ===== */
.page-about .pabout-tech {
  background:
    radial-gradient(circle at 85% 20%, rgba(0, 229, 255, 0.07), transparent 32%),
    linear-gradient(180deg, rgba(255, 0, 255, 0.03), transparent 40%),
    var(--color-bg);
}

.page-about .pabout-tech__head {
  max-width: 720px;
  margin-bottom: 36px;
}

.page-about .pabout-tech__head p:last-child {
  color: var(--color-muted);
}

.page-about .pabout-tech__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
}

.page-about .pabout-tech__visual {
  position: relative;
  margin: 0;
}

.page-about .pabout-tech__visual::before {
  content: "";
  position: absolute;
  inset: -10px auto auto -10px;
  width: 60px;
  height: 60px;
  border-top: 2px solid var(--color-cyan);
  border-left: 2px solid var(--color-cyan);
  border-radius: 14px 0 0 0;
  opacity: 0.5;
}

.page-about .pabout-tech__visual img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
}

.page-about .pabout-tech__feature {
  border-left: 2px solid var(--color-cyan);
  padding-left: 18px;
  margin-bottom: 28px;
}

.page-about .pabout-tech__feature p {
  color: var(--color-muted);
  font-size: 15px;
  margin-bottom: 0;
}

.page-about .pabout-tech .btn {
  margin-top: 8px;
}

/* ===== 内容审核与合规 ===== */
.page-about .pabout-compliance {
  background:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
}

.page-about .pabout-compliance__head {
  max-width: 780px;
  margin-bottom: 24px;
}

.page-about .pabout-compliance__head p:last-child {
  color: var(--color-muted);
}

.page-about .pabout-compliance__notice {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background: linear-gradient(90deg, rgba(255, 59, 48, 0.12), rgba(255, 0, 255, 0.06));
  border: 1px solid rgba(255, 59, 48, 0.32);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  margin-bottom: 20px;
}

.page-about .pabout-compliance__notice-icon {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 24px;
  line-height: 1;
  color: var(--color-warning);
  flex-shrink: 0;
}

.page-about .pabout-compliance__notice p {
  margin: 0;
  font-size: 15px;
  color: var(--color-text);
}

.page-about .pabout-compliance__grid {
  display: grid;
  gap: 16px;
}

.page-about .pabout-compliance__card {
  background: var(--color-panel);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.page-about .pabout-compliance__card:hover {
  border-color: rgba(255, 0, 255, 0.35);
  box-shadow: 0 0 0 1px rgba(255, 0, 255, 0.06), 0 12px 28px rgba(255, 0, 255, 0.06);
}

.page-about .pabout-compliance__card p {
  color: var(--color-muted);
  font-size: 15px;
  margin-bottom: 0;
}

.page-about .pabout-compliance__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 28px;
  padding: 20px 24px;
  border-radius: var(--radius-md);
  background: rgba(19, 19, 32, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.page-about .pabout-compliance__foot p {
  margin: 0;
  color: var(--color-muted);
  font-size: 15px;
}

/* ===== 团队文化 ===== */
.page-about .pabout-team {
  position: relative;
  overflow: hidden;
}

.page-about .pabout-team::before {
  content: "";
  position: absolute;
  top: 10%;
  right: -10%;
  width: 340px;
  height: 340px;
  background: radial-gradient(circle, rgba(255, 0, 255, 0.1), transparent 68%);
  pointer-events: none;
}

.page-about .pabout-team__head {
  max-width: 720px;
  margin-bottom: 36px;
}

.page-about .pabout-team__head p:last-child {
  color: var(--color-muted);
}

.page-about .pabout-team__grid {
  display: grid;
  gap: 32px;
  align-items: center;
}

.page-about .pabout-team__content p {
  color: var(--color-muted);
}

.page-about .pabout-team__content p strong {
  color: var(--color-text);
}

.page-about .pabout-team__values {
  list-style: none;
  margin: 24px 0;
  padding: 0;
}

.page-about .pabout-team__values li {
  position: relative;
  padding-left: 22px;
  color: var(--color-muted);
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: 14px;
}

.page-about .pabout-team__values li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-primary);
  box-shadow: 0 0 8px rgba(255, 0, 255, 0.6);
}

.page-about .pabout-team__visual {
  position: relative;
  margin: 0;
}

.page-about .pabout-team__visual::after {
  content: "";
  position: absolute;
  inset: auto -12px -12px auto;
  width: 70px;
  height: 70px;
  border-right: 2px solid var(--color-primary);
  border-bottom: 2px solid var(--color-primary);
  border-radius: 0 0 14px 0;
  opacity: 0.45;
}

.page-about .pabout-team__visual img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
}

/* ===== 响应式 ===== */
@media (min-width: 768px) {
  .page-about .pabout-mission__facts {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about .pabout-compliance__grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .pabout-timeline__track::before {
    left: 141px;
  }

  .page-about .pabout-timeline__item {
    display: grid;
    grid-template-columns: 140px 1fr;
    column-gap: 76px;
    padding-left: 0;
    align-items: start;
  }

  .page-about .pabout-timeline__item::before {
    left: 135px;
    top: 4px;
  }

  .page-about .pabout-timeline__time {
    text-align: right;
    margin-bottom: 0;
    padding-top: 2px;
  }
}

@media (min-width: 960px) {
  .page-about .pabout-hero__layout {
    grid-template-columns: 1.1fr 0.9fr;
  }

  .page-about .pabout-mission__layout {
    grid-template-columns: 1.15fr 0.85fr;
  }

  .page-about .pabout-tech__grid {
    grid-template-columns: 1.05fr 0.95fr;
  }

  .page-about .pabout-team__grid {
    grid-template-columns: 1.15fr 0.85fr;
  }

  .page-about .pabout-team__head,
  .page-about .pabout-tech__head {
    margin-bottom: 48px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition: none !important;
    transform: none !important;
    box-shadow: none !important;
  }
}