/* ============================================
   YUEWEI 全球供应链 - 专业高端设计系统
   Professional Premium Design System
   遵循 taste-design 设计标准
   ============================================ */

/* 设计变量 - Design Tokens */
:root {
  /* 主色调 - Primary Colors */
  --yw-primary: #4a90a4;
  --yw-primary-dark: #2c5f7c;
  --yw-primary-darker: #1a3a4a;
  --yw-primary-light: rgba(74, 144, 164, 0.08);

  /* 背景色 - Background Colors */
  --yw-bg: #fafafa;
  --yw-surface: #ffffff;
  --yw-hero-bg: linear-gradient(135deg, #0f172a 0%, #1e3a5f 50%, #1a3a4a 100%);

  /* 文字色 - Text Colors */
  --yw-text: #18181b;
  --yw-text-muted: #71717a;
  --yw-text-light: rgba(255, 255, 255, 0.9);

  /* 边框与阴影 - Border & Shadow */
  --yw-border: rgba(226, 232, 240, 0.6);
  --yw-border-light: rgba(255, 255, 255, 0.1);
  --yw-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
  --yw-shadow-hover: 0 12px 40px rgba(74, 144, 164, 0.12);
  --yw-shadow-glow: 0 0 40px rgba(74, 144, 164, 0.3);

  /* 圆角 - Border Radius */
  --yw-radius: 16px;
  --yw-radius-lg: 24px;
  --yw-radius-full: 100px;

  /* 过渡 - Transitions */
  --yw-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --yw-transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   Hero Section - 首屏英雄区
   ============================================ */
.yw-hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  background: var(--yw-hero-bg);
  padding: 120px 40px 80px;
}

.yw-hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

/* 动态网格背景 */
.yw-hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  animation: yw-grid-drift 30s linear infinite;
}

@keyframes yw-grid-drift {
  0% { transform: translate(0, 0); }
  100% { transform: translate(60px, 60px); }
}

/* 光晕效果 */
.yw-hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.4;
}

.yw-hero-glow-1 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(74, 144, 164, 0.5) 0%, transparent 70%);
  top: -150px;
  right: -100px;
  animation: yw-glow-pulse-1 8s ease-in-out infinite;
}

.yw-hero-glow-2 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(44, 95, 124, 0.4) 0%, transparent 70%);
  bottom: -100px;
  left: -100px;
  animation: yw-glow-pulse-2 10s ease-in-out infinite;
}

@keyframes yw-glow-pulse-1 {
  0%, 100% { opacity: 0.4; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.1); }
}

@keyframes yw-glow-pulse-2 {
  0%, 100% { opacity: 0.3; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.15); }
}

.yw-hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 900px;
}

.yw-hero-badge {
  display: inline-block;
  padding: 8px 20px;
  background: rgba(74, 144, 164, 0.15);
  border: 1px solid rgba(74, 144, 164, 0.3);
  border-radius: var(--yw-radius-full);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: #4a90a4;
  margin-bottom: 30px;
  backdrop-filter: blur(10px);
}

.yw-hero-title {
  margin-bottom: 24px;
}

.yw-hero-title-line {
  display: block;
  font-size: clamp(32px, 6vw, 56px);
  font-weight: 700;
  color: #ffffff;
  letter-spacing: -1px;
  line-height: 1.2;
}

.yw-hero-title-accent {
  background: linear-gradient(135deg, #4a90a4 0%, #7dd3c0 50%, #4a90a4 100%);
  background-size: 200% 100%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: yw-text-gradient 4s ease infinite;
}

@keyframes yw-text-gradient {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.yw-hero-desc {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.8;
  margin-bottom: 40px;
  font-weight: 400;
}

.yw-hero-tags {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.yw-hero-tag {
  display: inline-block;
  padding: 10px 20px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.8);
  transition: var(--yw-transition);
  backdrop-filter: blur(10px);
  text-decoration: none;
  cursor: pointer;
}

.yw-hero-tag:hover {
  background: rgba(74, 144, 164, 0.2);
  border-color: rgba(74, 144, 164, 0.4);
  color: #ffffff;
  transform: translateY(-2px);
}

/* ============================================
   Section Base - 通用板块基础样式
   ============================================ */
.yw-section {
  padding: 100px 40px;
  position: relative;
}

.yw-section-alt {
  background: var(--yw-bg);
}

.yw-section-container {
  max-width: 1200px;
  margin: 0 auto;
}

.yw-section-header {
  text-align: center;
  margin-bottom: 60px;
}

.yw-section-label {
  display: inline-block;
  font-size: 48px;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--yw-primary);
  margin-bottom: 16px;
}

.yw-section-title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  color: var(--yw-text);
  letter-spacing: -0.5px;
  margin-bottom: 16px;
}

.yw-section-intro {
  font-size: 16px;
  color: var(--yw-text-muted);
  max-width: 700px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ============================================
   Services Grid - 服务网格
   ============================================ */
.yw-services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.yw-service-card {
  background: var(--yw-surface);
  border-radius: var(--yw-radius-lg);
  padding: 32px;
  position: relative;
  border: 1px solid var(--yw-border);
  transition: var(--yw-transition-slow);
  overflow: hidden;
}

.yw-service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--yw-primary), var(--yw-primary-dark));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.yw-service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--yw-shadow-hover);
  border-color: rgba(74, 144, 164, 0.2);
}

.yw-service-card:hover::before {
  opacity: 1;
}

.yw-service-card-large {
  grid-column: span 2;
}

.yw-service-number {
  position: absolute;
  top: 24px;
  right: 24px;
  font-size: 48px;
  font-weight: 800;
  color: rgba(74, 144, 164, 0.08);
  line-height: 1;
}

.yw-service-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--yw-primary-light) 0%, rgba(74, 144, 164, 0.15) 100%);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--yw-primary);
  margin-bottom: 20px;
}

.yw-service-name {
  font-size: 20px;
  font-weight: 600;
  color: var(--yw-text);
  margin-bottom: 12px;
}

.yw-service-desc {
  font-size: 14px;
  color: var(--yw-text-muted);
  line-height: 1.7;
}

.yw-service-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 16px;
}

.yw-service-tags span {
  padding: 6px 12px;
  background: var(--yw-primary-light);
  border-radius: 6px;
  font-size: 12px;
  font-weight: 500;
  color: var(--yw-primary-dark);
}

/* ============================================
   Process Timeline - 流程时间线
   ============================================ */
.yw-process-timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 800px;
  margin: 0 auto;
}

.yw-process-line {
  position: absolute;
  left: 32px;
  top: 40px;
  bottom: 40px;
  width: 2px;
  background: linear-gradient(180deg, var(--yw-primary) 0%, var(--yw-primary-dark) 100%);
  opacity: 0.2;
}

.yw-process-step {
  display: flex;
  align-items: flex-start;
  gap: 32px;
  padding: 24px 0;
  position: relative;
}

.yw-process-marker {
  width: 64px;
  height: 64px;
  background: var(--yw-surface);
  border: 2px solid var(--yw-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  position: relative;
  z-index: 2;
  transition: var(--yw-transition);
}

.yw-process-marker span {
  font-size: 18px;
  font-weight: 700;
  color: var(--yw-primary);
}

.yw-process-step:hover .yw-process-marker {
  background: var(--yw-primary);
  transform: scale(1.1);
}

.yw-process-step:hover .yw-process-marker span {
  color: #ffffff;
}

.yw-process-content {
  flex: 1;
  padding-top: 12px;
}

.yw-process-content h4 {
  font-size: 20px;
  font-weight: 600;
  color: var(--yw-text);
  margin-bottom: 8px;
}

.yw-process-content p {
  font-size: 15px;
  color: var(--yw-text-muted);
  line-height: 1.7;
}

/* ============================================
   Advantages Grid - 优势网格
   ============================================ */
.yw-advantages-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

.yw-advantage-card {
  background: var(--yw-surface);
  border-radius: var(--yw-radius-lg);
  padding: 30px;
  border: 1px solid var(--yw-border);
  transition: var(--yw-transition-slow);
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.yw-advantage-card:hover {
  transform: translateY(-8px);
  border-color: rgba(74, 144, 164, 0.2);
  box-shadow: var(--yw-shadow-hover);
}

.yw-advantage-icon {
  width: 64px;
  height: 64px;
  background: var(--yw-primary-light);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--yw-primary);
  flex-shrink: 0;
}

.yw-advantage-content h4 {
  font-size: 18px;
  font-weight: 600;
  color: var(--yw-text);
  margin-bottom: 8px;
}

.yw-advantage-content p {
  font-size: 14px;
  color: var(--yw-text-muted);
  line-height: 1.6;
}

/* ============================================
   Value Cards - 价值卡片
   ============================================ */
.yw-value-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.yw-value-card {
  background: var(--yw-bg);
  border-radius: var(--yw-radius-lg);
  padding: 40px 28px;
  text-align: center;
  border: 1px solid var(--yw-border);
  transition: var(--yw-transition-slow);
  position: relative;
  overflow: hidden;
}

.yw-value-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, var(--yw-primary-light) 0%, transparent 100%);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.yw-value-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--yw-shadow-hover);
  border-color: rgba(74, 144, 164, 0.2);
}

.yw-value-card:hover::before {
  opacity: 1;
}

.yw-value-card-featured {
  background: linear-gradient(135deg, var(--yw-primary) 0%, var(--yw-primary-dark) 100%);
  border: none;
}

.yw-value-card-featured .yw-value-card-icon {
  background: rgba(255, 255, 255, 0.2);
  color: #ffffff;
}

.yw-value-card-featured .yw-value-card-title {
  color: #ffffff;
}

.yw-value-card-featured .yw-value-card-desc {
  color: rgba(255, 255, 255, 0.85);
}

.yw-value-card-icon {
  width: 64px;
  height: 64px;
  background: var(--yw-primary-light);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--yw-primary);
  margin: 0 auto 20px;
  position: relative;
  z-index: 1;
}

.yw-value-card-title {
  font-size: 20px;
  font-weight: 600;
  color: var(--yw-text);
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}

.yw-value-card-desc {
  font-size: 14px;
  color: var(--yw-text-muted);
  line-height: 1.7;
  position: relative;
  z-index: 1;
}

/* ============================================
   CTA Section - 行动召唤区
   ============================================ */
.yw-cta {
  background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 100%);
  text-align: center;
  padding: 80px 40px;
}

.yw-cta-title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 16px;
}

.yw-cta-desc {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 32px;
}

.yw-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 16px 36px;
  background: linear-gradient(135deg, var(--yw-primary) 0%, var(--yw-primary-dark) 100%);
  border-radius: var(--yw-radius-full);
  color: #ffffff;
  text-decoration: none;
  font-size: 16px;
  font-weight: 600;
  transition: var(--yw-transition);
  box-shadow: 0 4px 24px rgba(74, 144, 164, 0.4);
}

.yw-cta-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 32px rgba(74, 144, 164, 0.5);
}

.yw-cta-btn svg {
  transition: transform 0.3s ease;
}

.yw-cta-btn:hover svg {
  transform: translateX(4px);
}

/* ============================================
   Cooperation Cards - 合作卡片
   ============================================ */
.yw-coop-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

.yw-coop-card {
  background: var(--yw-surface);
  border-radius: var(--yw-radius-lg);
  overflow: hidden;
  box-shadow: none;
  transition: var(--yw-transition-slow);
  border: 1px solid var(--yw-border);
}

.yw-coop-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--yw-shadow-hover);
  border-color: rgba(74, 144, 164, 0.2);
}

.yw-coop-header {
  background: var(--yw-surface);
  padding: 30px;
  text-align: left;
  border-bottom: none;
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.yw-coop-icon {
  width: 64px;
  height: 64px;
  background: var(--yw-primary-light);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--yw-primary);
  flex-shrink: 0;
}

.yw-coop-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--yw-text);
  margin-bottom: 8px;
}

.yw-coop-content {
  padding: 0 30px 30px;
}

.yw-coop-text {
  font-size: 14px;
  color: var(--yw-text-muted);
  line-height: 1.6;
}

/* ============================================
   Stats Section - 数据统计区
   ============================================ */
.yw-stats {
  display: flex;
  justify-content: center;
  gap: 60px;
  margin: 40px 0;
}

.yw-stat-item {
  text-align: center;
}

.yw-stat-number {
  font-size: 56px;
  font-weight: 800;
  color: var(--yw-primary);
  line-height: 1;
}

.yw-stat-plus {
  font-size: 32px;
  font-weight: 700;
  color: var(--yw-primary);
}

.yw-stat-label {
  display: block;
  font-size: 14px;
  color: var(--yw-text-muted);
  margin-top: 8px;
  letter-spacing: 1px;
}

.yw-stat-divider {
  width: 1px;
  height: 60px;
  background: linear-gradient(180deg, transparent, rgba(74, 144, 164, 0.3), transparent);
  align-self: center;
}

/* ============================================
   Responsive Design - 响应式设计
   ============================================ */
@media (max-width: 1024px) {
  .yw-services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .yw-service-card-large {
    grid-column: span 2;
  }

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

  .yw-coop-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .yw-hero {
    padding: 100px 20px 60px;
  }

  .yw-hero-tags {
    gap: 8px;
  }

  .yw-hero-tag {
    padding: 8px 14px;
    font-size: 12px;
  }

  .yw-section {
    padding: 60px 20px;
  }

  .yw-services-grid {
    grid-template-columns: 1fr;
  }

  .yw-service-card-large {
    grid-column: span 1;
  }

  .yw-process-line {
    left: 24px;
  }

  .yw-process-step {
    gap: 20px;
  }

  .yw-process-marker {
    width: 48px;
    height: 48px;
  }

  .yw-process-marker span {
    font-size: 14px;
  }

  .yw-value-grid {
    grid-template-columns: 1fr;
  }

  .yw-advantages-grid {
    grid-template-columns: 1fr;
  }

  .yw-stats {
    flex-direction: column;
    gap: 24px;
  }

  .yw-stat-divider {
    width: 60px;
    height: 1px;
  }
}

/* ============================================
   Animations - 动画效果
   ============================================ */
@keyframes yw-fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.yw-service-card,
.yw-process-step,
.yw-advantage-card,
.yw-value-card,
.yw-coop-card {
  opacity: 0;
  animation: yw-fadeInUp 0.6s ease forwards;
}

.yw-service-card:nth-child(1) { animation-delay: 0.1s; }
.yw-service-card:nth-child(2) { animation-delay: 0.2s; }
.yw-service-card:nth-child(3) { animation-delay: 0.3s; }
.yw-service-card:nth-child(4) { animation-delay: 0.4s; }
.yw-service-card:nth-child(5) { animation-delay: 0.5s; }

.yw-process-step:nth-child(1) { animation-delay: 0.1s; }
.yw-process-step:nth-child(2) { animation-delay: 0.2s; }
.yw-process-step:nth-child(3) { animation-delay: 0.3s; }
.yw-process-step:nth-child(4) { animation-delay: 0.4s; }
.yw-process-step:nth-child(5) { animation-delay: 0.5s; }

.yw-advantage-card:nth-child(1) { animation-delay: 0.1s; }
.yw-advantage-card:nth-child(2) { animation-delay: 0.2s; }
.yw-advantage-card:nth-child(3) { animation-delay: 0.3s; }
.yw-advantage-card:nth-child(4) { animation-delay: 0.4s; }

.yw-value-card:nth-child(1) { animation-delay: 0.1s; }
.yw-value-card:nth-child(2) { animation-delay: 0.2s; }
.yw-value-card:nth-child(3) { animation-delay: 0.3s; }
.yw-value-card:nth-child(4) { animation-delay: 0.4s; }

.yw-coop-card:nth-child(1) { animation-delay: 0.1s; }
.yw-coop-card:nth-child(2) { animation-delay: 0.2s; }
.yw-coop-card:nth-child(3) { animation-delay: 0.3s; }
.yw-coop-card:nth-child(4) { animation-delay: 0.4s; }

/* Reduced Motion - 减少动画 */
@media (prefers-reduced-motion: reduce) {
  .yw-hero-grid,
  .yw-hero-glow,
  .yw-service-card,
  .yw-process-step,
  .yw-advantage-card,
  .yw-value-card,
  .yw-coop-card {
    animation: none;
    opacity: 1;
  }
}

/* ============================================
   SVG Icons - 图标样式
   ============================================ */
.yw-icon {
  width: 24px;
  height: 24px;
  display: inline-block;
}

.yw-icon-lg {
  width: 32px;
  height: 32px;
}