/* ===================================================================
   AI应用开发页面 - 增强设计样式
   基于 frontend-design skill 的设计原则
   =================================================================== */

/* 设计方向：科技感+精致，避免通用AI美学 */

/* CSS变量 - 独特的配色方案 */
:root {
  --ai-primary: #0a2540;        /* 深海军蓝 - 专业、可信 */
  --ai-accent: #00d4ff;          /* 青蓝色 - 科技感 */
  --ai-secondary: #ff6b35;       /* 活力橙 - 强调 */
  --ai-success: #00e676;         /* 青绿色 - 成功指标 */
  --ai-bg-gradient-start: #0a2540;
  --ai-bg-gradient-end: #1a3a5c;
  --ai-card-bg: #ffffff;
  --ai-card-hover: #f8fbff;
  --ai-text-primary: #0a2540;
  --ai-text-secondary: #4a5568;
  --ai-border: #e2e8f0;
  --ai-shadow-sm: 0 2px 8px rgba(10, 37, 64, 0.08);
  --ai-shadow-md: 0 8px 24px rgba(10, 37, 64, 0.12);
  --ai-shadow-lg: 0 16px 48px rgba(10, 37, 64, 0.16);
}

/* 页面主容器 */
.ai-application-development {
  position: relative;
  padding: 80px 0;
  background: linear-gradient(180deg, #ffffff 0%, #f8fbff 50%, #ffffff 100%);
  overflow: hidden;
}

/* 添加背景装饰元素 */
.ai-application-development::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    radial-gradient(circle at 20% 30%, rgba(0, 212, 255, 0.03) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(255, 107, 53, 0.03) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

.ai-application-development > .container {
  position: relative;
  z-index: 1;
}

/* 标题区域 - 改进排版 */
.ai-application-development .section-header {
  margin-bottom: 80px;
  position: relative;
}

.ai-application-development .section-header h2 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: 24px;
  background: linear-gradient(135deg, var(--ai-primary) 0%, var(--ai-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.ai-application-development .section-header .highlight {
  background: linear-gradient(135deg, var(--ai-accent) 0%, var(--ai-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
}

.ai-application-development .section-header p {
  font-size: 1.25rem;
  color: var(--ai-text-secondary);
  max-width: 700px;
  margin: 0 auto;
  line-height: 1.7;
}

/* 核心价值主张 - 重新设计 */
.ai-application-development .value-proposition {
  position: relative;
  padding: 60px 40px !important;
  border-radius: 24px !important;
  background: linear-gradient(135deg, var(--ai-primary) 0%, var(--ai-bg-gradient-end) 100%) !important;
  color: white !important;
  margin-bottom: 80px !important;
  overflow: hidden;
  box-shadow: var(--ai-shadow-lg);
}

.ai-application-development .value-proposition::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  animation: pulse 8s ease-in-out infinite;
}

.ai-application-development .value-proposition::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255, 107, 53, 0.1) 0%, transparent 70%);
  border-radius: 50%;
  animation: pulse 10s ease-in-out infinite reverse;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.1); opacity: 0.8; }
}

.ai-application-development .value-proposition h3 {
  font-size: clamp(1.75rem, 4vw, 2.5rem) !important;
  font-weight: 700 !important;
  margin-bottom: 20px !important;
  position: relative;
  z-index: 1;
  letter-spacing: -0.01em;
}

.ai-application-development .value-proposition .lead {
  font-size: clamp(1.1rem, 2vw, 1.4rem) !important;
  opacity: 0.95 !important;
  position: relative;
  z-index: 1;
  line-height: 1.6;
}

/* 统计数据 - 增强视觉效果 */
.ai-application-development .stat-item {
  position: relative;
  z-index: 1;
  padding: 20px;
  transition: transform 0.3s ease;
}

.ai-application-development .stat-item:hover {
  transform: translateY(-5px);
}

.ai-application-development .stat-number {
  font-size: clamp(2.5rem, 6vw, 4rem) !important;
  font-weight: 900 !important;
  background: linear-gradient(135deg, #ffffff 0%, var(--ai-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 8px;
  display: block;
}

.ai-application-development .stat-label {
  font-size: 1rem !important;
  opacity: 0.9;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* 应用场景卡片 - 完全重新设计 */
.ai-application-development .application-card {
  background: var(--ai-card-bg) !important;
  border-radius: 20px !important;
  padding: 32px !important;
  box-shadow: var(--ai-shadow-sm) !important;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1) !important;
  border: 2px solid transparent !important;
  position: relative;
  overflow: hidden;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.ai-application-development .application-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--ai-accent) 0%, var(--ai-secondary) 100%);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.ai-application-development .application-card:hover {
  transform: translateY(-8px) !important;
  box-shadow: var(--ai-shadow-lg) !important;
  border-color: var(--ai-accent) !important;
  background: var(--ai-card-hover) !important;
}

.ai-application-development .application-card:hover::before {
  transform: scaleX(1);
}

.ai-application-development .application-card:hover .application-icon {
  transform: scale(1.1) rotate(5deg);
}

/* 图标样式 */
.ai-application-development .application-icon {
  font-size: 3.5rem !important;
  margin-bottom: 24px !important;
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  display: inline-block;
  background: linear-gradient(135deg, var(--ai-accent) 0%, var(--ai-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.ai-application-development .application-card h4 {
  font-size: 1.5rem !important;
  font-weight: 700 !important;
  color: var(--ai-text-primary) !important;
  margin-bottom: 20px !important;
  letter-spacing: -0.01em;
}

.ai-application-development .application-card ul {
  flex-grow: 1;
  margin-bottom: 24px;
}

.ai-application-development .application-card ul li {
  padding: 10px 0;
  color: var(--ai-text-secondary) !important;
  line-height: 1.7 !important;
  font-size: 0.95rem;
  position: relative;
  padding-left: 28px;
}

.ai-application-development .application-card ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 14px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--ai-success);
  box-shadow: 0 0 0 3px rgba(0, 230, 118, 0.2);
}

.ai-application-development .application-card ul li i {
  display: none; /* 隐藏Font Awesome图标，使用自定义样式 */
}

/* ROI区域 */
.ai-application-development .application-card > div:last-child {
  margin-top: auto;
  padding-top: 20px;
  border-top: 2px solid var(--ai-border) !important;
}

.ai-application-development .application-card strong {
  color: var(--ai-success) !important;
  font-size: 1.05rem !important;
  font-weight: 700 !important;
  display: block;
  line-height: 1.5;
}

/* 为什么选择我们 - 重新设计 */
.ai-application-development .advantages-section {
  background: linear-gradient(135deg, #f8fbff 0%, #ffffff 100%);
  padding: 80px 0;
  border-radius: 24px;
  margin: 80px 0;
  position: relative;
  overflow: hidden;
}

.ai-application-development .advantages-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    radial-gradient(circle at 10% 20%, rgba(0, 212, 255, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 90% 80%, rgba(255, 107, 53, 0.05) 0%, transparent 50%);
  pointer-events: none;
}

.ai-application-development .advantages-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem) !important;
  font-weight: 700 !important;
  color: var(--ai-text-primary) !important;
  position: relative;
  z-index: 1;
  letter-spacing: -0.01em;
}

.ai-application-development .advantage-item {
  padding: 40px 30px;
  background: var(--ai-card-bg);
  border-radius: 16px;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  border: 2px solid transparent;
  height: 100%;
}

.ai-application-development .advantage-item:hover {
  transform: translateY(-6px);
  border-color: var(--ai-accent);
  box-shadow: var(--ai-shadow-md);
  background: var(--ai-card-hover);
}

.ai-application-development .advantage-icon {
  font-size: 4rem !important;
  margin-bottom: 24px !important;
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  display: inline-block;
}

.ai-application-development .advantage-item:hover .advantage-icon {
  transform: scale(1.15) rotate(-5deg);
}

.ai-application-development .advantage-item h5 {
  font-size: 1.3rem !important;
  font-weight: 700 !important;
  color: var(--ai-text-primary) !important;
  margin-bottom: 16px !important;
}

.ai-application-development .advantage-item p {
  color: var(--ai-text-secondary) !important;
  line-height: 1.7;
  font-size: 0.95rem;
}

/* 成功案例卡片 */
.ai-application-development .case-card {
  background: var(--ai-card-bg) !important;
  border-radius: 20px !important;
  padding: 32px !important;
  box-shadow: var(--ai-shadow-sm) !important;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1) !important;
  border-left: 5px solid var(--ai-accent) !important;
  height: 100%;
  position: relative;
  overflow: hidden;
}

.ai-application-development .case-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 100px;
  height: 100px;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.1) 0%, transparent 70%);
  border-radius: 50%;
  transform: translate(30%, -30%);
}

.ai-application-development .case-card:hover {
  transform: translateY(-6px) !important;
  box-shadow: var(--ai-shadow-lg) !important;
}

.ai-application-development .case-header h5 {
  font-size: 1.3rem !important;
  font-weight: 700 !important;
  margin-bottom: 12px !important;
  color: var(--ai-text-primary) !important;
}

.ai-application-development .case-content p {
  color: var(--ai-text-secondary) !important;
  line-height: 1.8 !important;
  margin-bottom: 16px !important;
}

.ai-application-development .case-results {
  background: linear-gradient(135deg, rgba(0, 230, 118, 0.1) 0%, rgba(0, 212, 255, 0.1) 100%) !important;
  border-radius: 12px !important;
  padding: 20px !important;
  border-left: 4px solid var(--ai-success) !important;
}

.ai-application-development .case-results p {
  color: #0a2540 !important;
  font-weight: 600 !important;
  margin: 0 !important;
}

/* CTA区域 - 增强设计 */
.ai-application-development .cta-section {
  position: relative;
  padding: 80px 40px !important;
  border-radius: 24px !important;
  background: linear-gradient(135deg, var(--ai-primary) 0%, var(--ai-bg-gradient-end) 100%) !important;
  overflow: hidden;
  box-shadow: var(--ai-shadow-lg);
}

.ai-application-development .cta-section::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.2) 0%, transparent 70%);
  border-radius: 50%;
  animation: pulse 12s ease-in-out infinite;
}

.ai-application-development .cta-section h3 {
  font-size: clamp(2rem, 5vw, 3rem) !important;
  font-weight: 800 !important;
  position: relative;
  z-index: 1;
  letter-spacing: -0.02em;
}

.ai-application-development .cta-section .lead {
  font-size: clamp(1.1rem, 2vw, 1.4rem) !important;
  position: relative;
  z-index: 1;
}

.ai-application-development .cta-buttons .btn {
  border-radius: 50px !important;
  padding: 16px 40px !important;
  font-size: 1.1rem !important;
  font-weight: 600 !important;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
  position: relative;
  z-index: 1;
  border: none;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.ai-application-development .cta-buttons .btn:hover {
  transform: translateY(-2px) scale(1.05);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
}

.ai-application-development .cta-buttons .btn-light {
  background: white !important;
  color: var(--ai-primary) !important;
}

.ai-application-development .cta-buttons .btn-outline-light {
  background: transparent !important;
  border: 2px solid white !important;
  color: white !important;
}

.ai-application-development .cta-buttons .btn-outline-light:hover {
  background: white !important;
  color: var(--ai-primary) !important;
}

/* Section Subtitle 样式 */
.ai-application-development .section-subtitle h3 {
  font-size: clamp(1.75rem, 4vw, 2.5rem) !important;
  font-weight: 700 !important;
  color: var(--ai-text-primary) !important;
  margin-bottom: 16px !important;
  letter-spacing: -0.01em;
  position: relative;
  display: inline-block;
}

.ai-application-development .section-subtitle h3::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--ai-accent) 0%, var(--ai-secondary) 100%);
  border-radius: 2px;
}

.ai-application-development .section-subtitle p {
  font-size: 1.1rem !important;
  color: var(--ai-text-secondary) !important;
  margin-top: 24px !important;
}

/* 响应式设计 */
@media (max-width: 992px) {
  .ai-application-development {
    padding: 60px 0;
  }
  
  .ai-application-development .value-proposition {
    padding: 40px 30px !important;
  }
  
  .ai-application-development .application-card {
    margin-bottom: 24px;
  }
}

@media (max-width: 768px) {
  .ai-application-development .section-header {
    margin-bottom: 60px;
  }
  
  .ai-application-development .value-proposition {
    padding: 30px 20px !important;
  }
  
  .ai-application-development .application-card {
    padding: 24px !important;
  }
  
  .ai-application-development .cta-section {
    padding: 50px 20px !important;
  }
}

/* 滚动动画 */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.ai-application-development .application-card,
.ai-application-development .advantage-item,
.ai-application-development .case-card {
  animation: fadeInUp 0.6s ease-out backwards;
}

.ai-application-development .application-card:nth-child(1) { animation-delay: 0.1s; }
.ai-application-development .application-card:nth-child(2) { animation-delay: 0.2s; }
.ai-application-development .application-card:nth-child(3) { animation-delay: 0.3s; }
.ai-application-development .application-card:nth-child(4) { animation-delay: 0.4s; }
.ai-application-development .application-card:nth-child(5) { animation-delay: 0.5s; }
.ai-application-development .application-card:nth-child(6) { animation-delay: 0.6s; }