/* ==========================================================================
   PDFW.COM - 关于我们 (About Us) 专属设计系统
   Executive Light Aurora & Corporate Storytelling
   ========================================================================== */

/* 页面根容器 */
.about-page {
  background-color: var(--bg-body, #f8fafc);
  color: var(--text-main, #0f172a);
  overflow-x: hidden;
}

/* ==========================================================================
   1. 极光光晕星云首屏 (Hero Section)
   ========================================================================== */
.about-hero {
  position: relative;
  background: radial-gradient(circle at 50% -10%, #ffffff 0%, #f0f6ff 46%, #eaf2fc 100%);
  padding: 84px 0 92px;
  overflow: hidden;
  text-align: center;
  border-bottom: 1px solid #e2e8f0;
}

.about-hero-bg-fx {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.about-hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(rgba(22, 119, 255, 0.08) 1px, transparent 1px),
    linear-gradient(to right, rgba(22, 119, 255, 0.02) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(22, 119, 255, 0.02) 1px, transparent 1px);
  background-size: 32px 32px, 96px 96px, 96px 96px;
  background-position: center top;
  opacity: 0.8;
}

.about-aurora {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
}

.about-aurora-1 {
  top: -120px;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 420px;
  background: radial-gradient(ellipse at center, rgba(56, 189, 248, 0.22) 0%, rgba(99, 102, 241, 0.14) 50%, transparent 72%);
}

.about-aurora-2 {
  top: 15%;
  left: 6%;
  width: 480px;
  height: 480px;
  background: radial-gradient(circle, rgba(14, 165, 233, 0.12) 0%, transparent 68%);
}

.about-aurora-3 {
  top: 20%;
  right: 6%;
  width: 460px;
  height: 460px;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.1) 0%, transparent 68%);
}

.about-hero-inner {
  position: relative;
  z-index: 2;
  max-width: 980px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

/* 顶部流光胶囊徽章 */
.about-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 20px;
  border-radius: 9999px;
  background: #ffffff;
  border: 1px solid #dbeafe;
  box-shadow: 0 4px 14px rgba(22, 119, 255, 0.08), inset 0 1px 0 #ffffff;
  margin-bottom: 24px;
  transition: var(--transition);
}

.about-pill:hover {
  border-color: #93c5fd;
  box-shadow: 0 6px 18px rgba(22, 119, 255, 0.12);
  transform: translateY(-1px);
}

.about-pill-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary, #1677ff);
  box-shadow: 0 0 10px rgba(22, 119, 255, 0.6);
  animation: pulse-dot 2s infinite ease-in-out;
}

@keyframes pulse-dot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.35); opacity: 0.6; }
}

.about-pill-text {
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--primary);
  letter-spacing: 0.02em;
}

/* 核心大标题 */
.about-hero-title {
  font-size: clamp(2.3rem, 4.4vw, 3.6rem);
  font-weight: 800;
  line-height: 1.28;
  color: #0b192c;
  letter-spacing: -0.035em;
  margin-bottom: 20px;
}

.about-hero-gradient {
  background: linear-gradient(135deg, #0ea5e9 0%, #1677ff 45%, #6366f1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.about-hero-subtitle {
  font-size: clamp(1rem, 1.8vw, 1.18rem);
  line-height: 1.85;
  color: #475569;
  max-width: 780px;
  margin: 0 auto 36px;
}

.about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 50px;
}

/* 核心数据看板 */
.about-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  width: 100%;
  max-width: 980px;
  margin-top: 10px;
}

.about-stat-card {
  position: relative;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(226, 232, 240, 0.8);
  border-radius: var(--radius-lg, 16px);
  padding: 24px 20px;
  text-align: left;
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.04);
  transition: var(--transition);
  overflow: hidden;
}

.about-stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #0ea5e9, #1677ff);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.about-stat-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(22, 119, 255, 0.12);
  border-color: #bfdbfe;
  background: #ffffff;
}

.about-stat-card:hover::before {
  opacity: 1;
}

.about-stat-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: #eff6ff;
  color: #1677ff;
  font-size: 1.15rem;
  margin-bottom: 14px;
}

.about-stat-num {
  font-size: 2rem;
  font-weight: 800;
  color: #0f172a;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}

.about-stat-num small {
  font-size: 1.1rem;
  font-weight: 600;
  color: #1677ff;
  margin-left: 2px;
}

.about-stat-label {
  font-size: 0.88rem;
  font-weight: 600;
  color: #334155;
  margin-bottom: 4px;
}

.about-stat-desc {
  font-size: 0.78rem;
  color: #64748b;
  line-height: 1.45;
}

/* ==========================================================================
   2. 共通区域标题 (Section Headers)
   ========================================================================== */
.about-section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 54px;
}

.about-section-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 14px;
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  border-radius: 9999px;
  color: #1d4ed8;
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 14px;
}

.about-section-badge i {
  font-size: 0.8rem;
}

.about-section-title {
  font-size: clamp(1.8rem, 3vw, 2.35rem);
  font-weight: 800;
  color: #0f172a;
  letter-spacing: -0.025em;
  line-height: 1.32;
  margin-bottom: 14px;
}

.about-section-desc {
  font-size: 1rem;
  line-height: 1.8;
  color: #64748b;
}

/* ==========================================================================
   3. 我们的初心与故事 (Origin Story)
   ========================================================================== */
.story-section {
  background: #ffffff;
  border-bottom: 1px solid #e2e8f0;
}

.story-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 56px;
  align-items: center;
}

.story-content h2 {
  font-size: clamp(1.8rem, 2.8vw, 2.2rem);
  font-weight: 800;
  color: #0f172a;
  line-height: 1.35;
  margin-bottom: 22px;
}

.story-content p {
  font-size: 0.98rem;
  line-height: 1.88;
  color: #475569;
  margin-bottom: 18px;
}

.story-highlights {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 30px;
}

.story-highlight-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px;
  background: #f8fafc;
  border-radius: var(--radius-md, 10px);
  border: 1px solid #e2e8f0;
}

.story-highlight-item i {
  font-size: 1.15rem;
  color: var(--primary, #1677ff);
  margin-top: 2px;
  flex-shrink: 0;
}

.story-highlight-item strong {
  display: block;
  font-size: 0.92rem;
  color: #0f172a;
  margin-bottom: 2px;
}

.story-highlight-item span {
  font-size: 0.8rem;
  color: #64748b;
  line-height: 1.45;
}

/* 右侧交互展示卡片 (浅色商务蓝光质感) */
.story-visual-card {
  position: relative;
  background: linear-gradient(145deg, #f0f7ff 0%, #e6f1fe 40%, #ffffff 100%);
  border-radius: var(--radius-xl, 24px);
  padding: 38px 34px;
  color: #0f172a;
  box-shadow: 0 16px 40px -10px rgba(22, 119, 255, 0.12), 0 2px 10px rgba(15, 23, 42, 0.04);
  border: 1px solid #cfe2fe;
  overflow: hidden;
  transition: var(--transition);
}

.story-visual-card:hover {
  transform: translateY(-3px);
  border-color: #93c5fd;
  box-shadow: 0 22px 48px -10px rgba(22, 119, 255, 0.18), 0 4px 14px rgba(15, 23, 42, 0.06);
}

.story-visual-glow {
  position: absolute;
  top: -80px;
  right: -80px;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(22, 119, 255, 0.16) 0%, transparent 70%);
  pointer-events: none;
}

.story-visual-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  padding-bottom: 18px;
  border-bottom: 1px solid #dbeafe;
}

.story-visual-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.05rem;
  color: #0f172a;
}

.story-visual-brand i {
  color: var(--primary, #1677ff);
  font-size: 1.15rem;
}

.story-visual-badge {
  font-size: 0.76rem;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 9999px;
  background: #ffffff;
  color: #1d4ed8;
  border: 1px solid #bfdbfe;
  box-shadow: 0 2px 6px rgba(22, 119, 255, 0.08);
}

.story-quote {
  font-size: 1.12rem;
  line-height: 1.7;
  color: #1e293b;
  font-weight: 600;
  margin-bottom: 24px;
  position: relative;
  padding-left: 18px;
  border-left: 3px solid #1677ff;
}

.story-quote-author {
  display: flex;
  align-items: center;
  gap: 14px;
}

.story-author-avatar {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: linear-gradient(135deg, #1677ff, #0ea5e9);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: #ffffff;
  font-size: 1.15rem;
  box-shadow: 0 4px 12px rgba(22, 119, 255, 0.28);
}

.story-author-meta strong {
  display: block;
  font-size: 0.96rem;
  color: #0f172a;
  font-weight: 700;
}

.story-author-meta span {
  font-size: 0.8rem;
  color: #64748b;
}

.story-features-list {
  margin-top: 26px;
  padding-top: 20px;
  border-top: 1px solid #dbeafe;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.story-features-list li {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.88rem;
  color: #334155;
  font-weight: 500;
  background: rgba(255, 255, 255, 0.7);
  padding: 8px 12px;
  border-radius: 8px;
  border: 1px solid rgba(207, 226, 254, 0.6);
}

.story-features-list li i {
  color: #1677ff;
  font-size: 0.92rem;
}

/* ==========================================================================
   4. 使命、愿景与核心原则 (Mission & Vision)
   ========================================================================== */
.mission-section {
  background: #f8fafc;
}

.mission-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  margin-bottom: 40px;
}

.mission-card {
  position: relative;
  background: #ffffff;
  border-radius: var(--radius-xl, 24px);
  padding: 40px 36px;
  border: 1px solid #e2e8f0;
  box-shadow: 0 4px 20px rgba(15, 23, 42, 0.04);
  transition: var(--transition);
  overflow: hidden;
}

.mission-card:hover {
  transform: translateY(-4px);
  border-color: #93c5fd;
  box-shadow: 0 16px 36px rgba(22, 119, 255, 0.1);
}

.mission-card-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 5px 12px;
  border-radius: 6px;
  margin-bottom: 18px;
}

.mission-card.mission .mission-card-badge {
  background: #eff6ff;
  color: #1d4ed8;
}

.mission-card.vision .mission-card-badge {
  background: #f5f3ff;
  color: #6d28d9;
}

.mission-card h3 {
  font-size: 1.55rem;
  font-weight: 800;
  color: #0f172a;
  margin-bottom: 14px;
}

.mission-card p {
  font-size: 0.96rem;
  line-height: 1.8;
  color: #475569;
}

.mission-card-icon-bg {
  position: absolute;
  right: -20px;
  bottom: -20px;
  font-size: 8rem;
  opacity: 0.04;
  pointer-events: none;
}

/* ==========================================================================
   5. 六大核心价值观 (Core Values Grid)
   ========================================================================== */
.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.value-card {
  background: #ffffff;
  border-radius: var(--radius-lg, 16px);
  padding: 30px 26px;
  border: 1px solid #e2e8f0;
  box-shadow: 0 2px 10px rgba(15, 23, 42, 0.03);
  transition: var(--transition);
}

.value-card:hover {
  transform: translateY(-4px);
  border-color: #cbd5e1;
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.08);
}

.value-icon-box {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 18px;
}

.icon-blue { background: #eff6ff; color: #2563eb; }
.icon-emerald { background: #ecfdf5; color: #059669; }
.icon-amber { background: #fffbeb; color: #d97706; }
.icon-purple { background: #faf5ff; color: #7c3aed; }
.icon-cyan { background: #ecfeff; color: #0891b2; }
.icon-rose { background: #fff1f2; color: #e11d48; }

.value-card h4 {
  font-size: 1.18rem;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 8px;
}

.value-card p {
  font-size: 0.88rem;
  line-height: 1.7;
  color: #64748b;
}



/* ==========================================================================
   7. 技术与安全护城河 (Tech & Security Pillars)
   ========================================================================== */
.security-section {
  background: radial-gradient(circle at 50% 10%, #f0f7ff 0%, #f8fafc 100%);
}

.security-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.security-pillar-card {
  background: #ffffff;
  border-radius: var(--radius-lg, 16px);
  padding: 30px 24px;
  border: 1px solid #e2e8f0;
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.03);
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.security-pillar-card:hover {
  transform: translateY(-4px);
  border-color: #93c5fd;
  box-shadow: 0 14px 30px rgba(22, 119, 255, 0.1);
}

.security-pillar-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
  color: #1677ff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 20px;
}

.security-pillar-card h4 {
  font-size: 1.15rem;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 10px;
}

.security-pillar-card p {
  font-size: 0.86rem;
  line-height: 1.7;
  color: #64748b;
  flex-grow: 1;
  margin-bottom: 18px;
}

.security-pillar-specs {
  list-style: none;
  padding: 0;
  margin: 0;
  border-top: 1px dashed #e2e8f0;
  padding-top: 14px;
}

.security-pillar-specs li {
  font-size: 0.78rem;
  color: #475569;
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}

.security-pillar-specs li i {
  color: #10b981;
  font-size: 0.75rem;
}

/* ==========================================================================
   8. 企业信息与支持联系卡片 (Corporate & Contact Info)
   ========================================================================== */
.contact-info-section {
  background: #ffffff;
  border-top: 1px solid #e2e8f0;
}

.contact-info-card {
  background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-xl, 24px);
  padding: 46px 40px;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.04);
}

.contact-info-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.contact-info-text h3 {
  font-size: 1.6rem;
  font-weight: 800;
  color: #0f172a;
  margin-bottom: 12px;
}

.contact-info-text p {
  font-size: 0.95rem;
  line-height: 1.8;
  color: #475569;
  margin-bottom: 24px;
}

.contact-company-meta {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.contact-meta-row {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.92rem;
  color: #334155;
}

.contact-meta-row i {
  width: 20px;
  color: var(--primary, #1677ff);
  font-size: 1rem;
}

.contact-channels-box {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.contact-channel-item {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: var(--radius-md, 10px);
  padding: 20px;
  transition: var(--transition);
}

.contact-channel-item:hover {
  border-color: #93c5fd;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(22, 119, 255, 0.08);
}

.contact-channel-icon {
  font-size: 1.3rem;
  color: #1677ff;
  margin-bottom: 10px;
}

.contact-channel-item strong {
  display: block;
  font-size: 0.92rem;
  color: #0f172a;
  margin-bottom: 4px;
}

.contact-channel-item span {
  font-size: 0.82rem;
  color: #64748b;
  word-break: break-all;
}

/* ==========================================================================
   9. 响应式适配 (Responsive Media Queries)
   ========================================================================== */
@media (max-width: 1024px) {
  .about-stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .story-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

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

  .contact-info-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  .about-hero {
    padding: 56px 0 60px;
  }

  .about-hero-title {
    font-size: 2.1rem;
  }

  .about-hero-subtitle {
    font-size: 0.95rem;
    margin-bottom: 24px;
  }

  .about-hero-actions {
    flex-direction: column;
    width: 100%;
    max-width: 360px;
    margin: 0 auto 36px;
    gap: 12px;
  }

  .about-hero-actions .btn {
    width: 100%;
    justify-content: center;
  }

  .about-stats-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .mission-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .values-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .security-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .contact-channels-box {
    grid-template-columns: 1fr;
  }

  .contact-info-card {
    padding: 24px 18px;
  }
}