/**
 * 自定义样式 - 页面特定样式
 * 
 * @package AirBayTech
 * @since 1.0.0
 */

/* ========================================
   CSS Variables - 亮色调主题
   ======================================== */
:root {
  /* 文字颜色 */
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  
  /* 背景颜色 */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-card: #ffffff;
  --bg-dark: #f1f5f9;
  
  /* 渐变 */
  --gradient-accent: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 50%, #06b6d4 100%);
  --gradient-secondary: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
  
  /* 间距 */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2.5rem;
  --spacing-xl: 4rem;
  
  /* 圆角 */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  
  /* 过渡 */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.2);
}

/* ========================================
   Hero Section - 首页英雄区
   ======================================== */
.hero-section {
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding-top: 100px;
  padding-bottom: 80px;
  background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at top, rgba(59, 130, 246, 0.08) 0%, transparent 50%),
              radial-gradient(ellipse at bottom right, rgba(139, 92, 246, 0.08) 0%, transparent 50%);
  opacity: 1;
}

.hero-background::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 50%, rgba(59, 130, 246, 0.05) 0%, transparent 50%),
              radial-gradient(circle at 70% 50%, rgba(139, 92, 246, 0.05) 0%, transparent 50%);
  animation: rotate 60s linear infinite;
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 900px;
  margin: 0 auto;
}

.hero-title {
  font-size: 3.8rem;
  margin-bottom: 1.5rem;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  line-height: 1.2;
  font-weight: 700;
  color: var(--text-primary);
}

.hero-subtitle {
  font-size: 1.3rem;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  line-height: 1.7;
  opacity: 0.95;
}

.hero-buttons {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
  position: relative;
  z-index: 1;
  margin-top: 4rem;
}

.feature-item {
  text-align: center;
  padding: 1.75rem;
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-md);
  border: 1px solid rgba(0, 0, 0, 0.08);
  transition: var(--transition-normal);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.feature-item:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  border-color: var(--accent-blue);
}

.feature-icon {
  font-size: 2.75rem;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1rem;
}

.feature-item h3 {
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  font-size: 1.25rem;
  font-weight: 600;
}

.feature-item p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin: 0;
}

/* ========================================
   Services Section - 服务展示区
   ======================================== */
.services-section {
  background: linear-gradient(180deg, rgba(248, 250, 252, 0.5) 0%, rgba(241, 245, 249, 0.3) 100%);
  position: relative;
  padding-top: 80px;
  padding-bottom: 80px;
  margin-top: 60px;
}

.services-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 50%, rgba(59, 130, 246, 0.03) 0%, transparent 50%),
    radial-gradient(circle at 80% 50%, rgba(139, 92, 246, 0.03) 0%, transparent 50%);
  pointer-events: none;
}

.section-header {
  max-width: 800px;
  margin: 0 auto 4rem;
  text-align: center;
}

.section-header h2 {
  font-size: 2.8rem;
  margin-bottom: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.section-header p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-md);
  position: relative;
  z-index: 1;
}

.service-card {
  padding: 2.5rem 2rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  height: 100%;
  min-height: 280px;
}

.service-icon {
  font-size: 3rem;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 90px;
  height: 90px;
  margin-left: auto;
  margin-right: auto;
  border-radius: 20px;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.15) 0%, rgba(139, 92, 246, 0.15) 100%);
  position: relative;
  box-shadow: 0 4px 15px rgba(59, 130, 246, 0.2);
  transition: all 0.3s ease;
}

.service-card:hover .service-icon {
  transform: translateY(-5px) scale(1.05);
  box-shadow: 0 8px 25px rgba(59, 130, 246, 0.2);
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
}

.service-icon i {
  background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 50%, #06b6d4 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-size: 2.5rem;
}

.service-card h3 {
  margin-bottom: 1rem;
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
}

.service-card > p {
  margin-bottom: 1.5rem;
  text-align: left;
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

.service-features {
  list-style: none;
  text-align: left;
  margin-bottom: 1rem;
  flex-grow: 1;
}

.service-features li {
  padding: 0.35rem 0;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
}

.service-features i {
  color: var(--accent-cyan);
  font-size: 0.9rem;
}

.service-card .btn {
  margin-top: auto;
}

/* Learn More Button (btn-outline) */
.btn-outline {
  background: transparent;
  border: 2px solid rgba(59, 130, 246, 0.5);
  color: var(--accent-blue);
  padding: 0.875rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 50px;
  cursor: pointer;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  text-decoration: none;
  letter-spacing: 0.3px;
}

.btn-outline:hover {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
  border-color: var(--accent-blue);
  color: var(--accent-blue);
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(59, 130, 246, 0.3);
}

.btn-outline:active {
  transform: translateY(0);
}

/* ========================================
   Why Us Section - 为什么选择我们
   ======================================== */
.why-us-section {
  background: transparent;
  position: relative;
}

.why-us-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(180deg, transparent 0%, rgba(241, 245, 249, 0.5) 100%);
  pointer-events: none;
}

.why-us-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-md);
  position: relative;
  z-index: 1;
}

.why-us-item {
  padding: 2rem 1.75rem;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.why-us-number {
  position: absolute;
  top: 20px;
  right: 20px;
  font-size: 4rem;
  font-weight: 700;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  opacity: 0.3;
}

.why-us-item h3 {
  margin-bottom: 0.5rem;
  position: relative;
  z-index: 1;
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--text-primary);
}

.why-us-item p {
  position: relative;
  z-index: 1;
  line-height: 1.8;
  margin-bottom: 0;
  font-size: 1.05rem;
  color: var(--text-secondary);
  padding-top: 0.5rem;
}

/* ========================================
   CTA Section - 行动号召区
   ======================================== */
.cta-section {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.05) 0%, rgba(139, 92, 246, 0.05) 100%);
  position: relative;
  padding: 6rem 0;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at center, rgba(59, 130, 246, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.cta-content {
  padding: 3.5rem 2.5rem;
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.cta-content h2 {
  font-size: 2.8rem;
  margin-bottom: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.cta-content p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  line-height: 1.7;
}

.cta-buttons {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.cta-buttons .btn {
  min-width: 200px;
}

/* ========================================
   Contact Page - 联系页面
   ======================================== */
.page-header {
  padding-top: 100px;
  padding-bottom: var(--spacing-xl);
  background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
  text-align: center;
  position: relative;
}

.page-header h1 {
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--spacing-md);
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.contact-info-item {
  padding: var(--spacing-md);
  text-align: center;
}

.contact-icon {
  font-size: 2.5rem;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-sm);
}

.contact-info-item h3 {
  margin-bottom: var(--spacing-sm);
  font-size: 1.2rem;
}

.contact-info-item p {
  margin-bottom: 0;
}

.contact-form-wrapper {
  padding: var(--spacing-md);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.form-group {
  display: flex;
  flex-direction: column;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 1rem;
  transition: var(--transition-fast);
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--accent-blue);
  background: rgba(255, 255, 255, 1);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
  color: var(--text-muted);
}

.contact-form select {
  cursor: pointer;
}

.contact-form button {
  width: 100%;
  margin-top: var(--spacing-sm);
}

/* ========================================
   About Page - 关于页面
   ======================================== */
.page-header-content {
  max-width: 800px;
  margin: 0 auto;
}

.page-header-content h1 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-sm);
}

.page-header-content p {
  font-size: 1.1rem;
  color: var(--text-secondary);
}

.about-section {
  padding: var(--spacing-xl) 0;
  background: var(--bg-primary);
}

.about-grid {
  max-width: 1000px;
  margin: 0 auto;
}

.about-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.about-content h2 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.about-content p {
  font-size: 1.1rem;
  line-height: 1.8;
  margin-bottom: var(--spacing-md);
  color: var(--text-secondary);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.stat-item {
  padding: var(--spacing-lg);
  text-align: center;
  transition: var(--transition-fast);
}

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

.stat-item h3 {
  font-size: 3rem;
  margin-bottom: 0.5rem;
  font-weight: 700;
}

.stat-item p {
  color: var(--text-secondary);
  margin-bottom: 0;
  font-size: 1rem;
}

.mission-section {
  padding: var(--spacing-xl) 0;
  background: rgba(248, 250, 252, 0.5);
  position: relative;
}

.mission-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  max-width: 1200px;
  margin: 0 auto;
}

.mission-item {
  padding: var(--spacing-lg);
  text-align: center;
  transition: var(--transition-fast);
}

.mission-item:hover {
  transform: translateY(-5px);
}

.mission-icon {
  font-size: 3rem;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-md);
}

.mission-item h3 {
  margin-bottom: var(--spacing-md);
  font-size: 1.5rem;
}

.mission-item p {
  color: var(--text-secondary);
  line-height: 1.7;
  font-size: 1rem;
}

.team-section {
  padding: var(--spacing-xl) 0;
  background: var(--bg-primary);
}

.team-section .section-header {
  margin-bottom: var(--spacing-xl);
}

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  max-width: 1200px;
  margin: 0 auto;
}

.advantage-item {
  padding: var(--spacing-lg);
  text-align: center;
  transition: var(--transition-fast);
}

.advantage-item:hover {
  transform: translateY(-5px);
}

.advantage-icon {
  font-size: 2.5rem;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-md);
}

.advantage-item h3 {
  margin-bottom: var(--spacing-md);
  font-size: 1.3rem;
}

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

/* ========================================
   Footer Styles - 页脚样式
   ======================================== */
.site-footer {
  background: #f8fafc;
  color: var(--text-primary);
  padding: 3rem 0 1rem;
  margin-top: 4rem;
  border-top: 1px solid rgba(0, 0, 0, 0.1);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-section h3 {
  color: var(--accent-blue);
  margin-bottom: 1rem;
  font-size: 1.2rem;
}

.footer-section p {
  color: var(--text-secondary);
  line-height: 1.8;
}

.footer-section ul {
  list-style: none;
  padding: 0;
}

.footer-section ul li {
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.footer-section ul li a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.3s;
}

.footer-section ul li a:hover {
  color: var(--accent-blue);
}

.footer-section ul li i {
  color: var(--accent-cyan);
  width: 18px;
  text-align: center;
  flex-shrink: 0;
}

.footer-logo {
  margin-top: 1rem;
}

.footer-logo img {
  height: 40px;
  width: auto;
  opacity: 0.8;
}

.social-links {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
}

.social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(59, 130, 246, 0.1);
  color: var(--text-primary);
  text-decoration: none;
  transition: all 0.3s;
}

.social-link:hover {
  background: var(--accent-blue);
  color: white;
  transform: translateY(-3px);
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(0, 0, 0, 0.1);
  color: var(--text-secondary);
}

.footer-bottom a {
  color: var(--accent-blue);
  text-decoration: none;
}

.footer-bottom a:hover {
  text-decoration: underline;
}

/* Back to top button */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--accent-blue);
  color: white;
  border: none;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s;
  z-index: 999;
  box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--accent-purple);
  transform: translateY(-3px);
}

/* Footer Enhancements - 页脚增强 */
.footer-widget ul {
  list-style: none;
}

.footer-widget li {
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.footer-widget i {
  color: var(--accent-cyan);
  width: 20px;
}

/* ========================================
   Fade-in Animation - 淡入动画
   ======================================== */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible,
.fade-in.active {
  opacity: 1;
  transform: translateY(0);
}

/* ========================================
   Post/Blog Styles - 文章/博客样式
   ======================================== */
.content-area {
  padding: var(--spacing-xl) 0;
}

.post-thumbnail {
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: var(--spacing-md);
}

.post-thumbnail img {
  width: 100%;
  height: auto;
  display: block;
  transition: var(--transition-normal);
}

.card:hover .post-thumbnail img {
  transform: scale(1.05);
}

.post-content {
  padding: var(--spacing-md);
}

.entry-title a {
  color: var(--text-primary);
  transition: var(--transition-fast);
}

.entry-title a:hover {
  color: var(--accent-cyan);
}

.entry-meta {
  display: flex;
  gap: var(--spacing-sm);
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: var(--spacing-sm);
}

.entry-meta span {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.entry-content {
  margin-bottom: var(--spacing-md);
}

/* ========================================
   Pagination - 分页
   ======================================== */
.pagination {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-lg);
  flex-wrap: wrap;
}

.pagination .page-numbers {
  padding: 0.75rem 1.25rem;
  background: var(--bg-card);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  transition: var(--transition-fast);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.pagination .page-numbers:hover,
.pagination .page-numbers.current {
  background: var(--gradient-accent);
  color: white;
  border-color: transparent;
  transform: translateY(-2px);
}

/* ========================================
   响应式优化
   ======================================== */
@media (max-width: 1024px) {
  .hero-title {
    font-size: 3rem;
  }
  
  .contact-wrapper {
    grid-template-columns: 1fr;
  }
  
  .mission-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  }
  
  .advantages-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  }
}

@media (max-width: 768px) {
  .hero-section {
    min-height: auto;
    padding: var(--spacing-xl) 0;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-subtitle {
    font-size: 1.1rem;
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: stretch;
  }
  
  .hero-buttons .btn {
    width: 100%;
  }
  
  .services-grid {
    grid-template-columns: 1fr;
  }
  
  .why-us-grid {
    grid-template-columns: 1fr;
  }
  
  .page-header-content h1 {
    font-size: 2rem;
  }
  
  .about-content h2 {
    font-size: 2rem;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
  }
  
  .stat-item {
    padding: var(--spacing-md);
  }
  
  .stat-item h3 {
    font-size: 2.5rem;
  }
  
  .mission-grid {
    grid-template-columns: 1fr;
  }
  
  .advantages-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }
  
  .page-header-content h1 {
    font-size: 1.75rem;
  }
  
  .about-content h2 {
    font-size: 1.75rem;
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .stat-item h3 {
    font-size: 2rem;
  }
  
  .mission-item h3 {
    font-size: 1.3rem;
  }
  
  .advantage-item h3 {
    font-size: 1.1rem;
  }
  
  .cta-content h2 {
    font-size: 1.75rem;
  }
  
  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 45px;
    height: 45px;
  }
}

/* ========================================
   Form Messages - 表单消息样式
   ======================================== */
.form-message {
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-sm);
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-weight: 500;
  animation: slideInDown 0.3s ease;
}

.message-success {
  background: rgba(76, 175, 80, 0.2);
  border: 1px solid #4caf50;
  color: #4caf50;
}

.message-error {
  background: rgba(244, 67, 54, 0.2);
  border: 1px solid #f44336;
  color: #f44336;
}

.form-message i {
  font-size: 1.2rem;
}

@keyframes slideInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ========================================
   Loading States - 加载状态
   ======================================== */
.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.fa-spinner {
  animation: spin 1s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* ========================================
   Single Post Styles - 单篇文章样式
   ======================================== */
.single-content-area {
  padding: var(--spacing-xl) 0;
  max-width: 900px;
  margin: 0 auto;
}

.single-header {
  padding: var(--spacing-lg) 0;
  margin-bottom: var(--spacing-md);
}

.single-header .entry-title {
  font-size: 3rem;
  margin-bottom: var(--spacing-sm);
}

.single-post .post-thumbnail {
  margin-bottom: var(--spacing-md);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.single-post .post-thumbnail img {
  width: 100%;
  height: auto;
}

.single-post .entry-content {
  padding: var(--spacing-md);
  line-height: 1.8;
}

.single-post .entry-content h2,
.single-post .entry-content h3,
.single-post .entry-content h4 {
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
}

.single-post .entry-content p {
  margin-bottom: var(--spacing-sm);
}

.single-post .entry-content ul,
.single-post .entry-content ol {
  margin-bottom: var(--spacing-sm);
  padding-left: var(--spacing-md);
  color: var(--text-secondary);
}

.single-post .entry-content li {
  margin-bottom: 0.5rem;
}

.single-post .entry-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  margin: var(--spacing-md) 0;
}

.single-post .entry-footer {
  padding: var(--spacing-md);
  margin-top: var(--spacing-md);
}

.tags-links {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.tags-links a {
  background: var(--bg-card);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  border: 1px solid rgba(0, 0, 0, 0.1);
  transition: var(--transition-fast);
}

.tags-links a:hover {
  background: var(--accent-blue);
  border-color: var(--accent-blue);
  color: white;
}

/* ========================================
   Post Navigation - 文章导航
   ======================================== */
.post-navigation {
  margin: var(--spacing-lg) 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-sm);
}

.post-navigation .nav-links a {
  display: block;
  padding: var(--spacing-md);
  background: var(--bg-card);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: var(--transition-normal);
}

.post-navigation .nav-links a:hover {
  background: var(--bg-hover);
  border-color: var(--accent-blue);
  transform: translateX(5px);
}

.post-navigation .nav-previous a:hover {
  transform: translateX(-5px);
}

/* ========================================
   Page Content Styles - 页面内容样式
   ======================================== */
.page-content {
  padding: var(--spacing-lg) 0;
}

.page-content .entry-content {
  padding: var(--spacing-md);
  line-height: 1.8;
}

.page-content .entry-content h2 {
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
}

.page-content .entry-content p {
  margin-bottom: var(--spacing-sm);
}

/* ========================================
   Comments Section - 评论区样式
   ======================================== */
.comments-area {
  margin-top: var(--spacing-lg);
  padding: var(--spacing-md);
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.comments-title {
  margin-bottom: var(--spacing-md);
}

.comment-list {
  list-style: none;
  padding: 0;
}

.comment-body {
  padding: var(--spacing-md);
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-sm);
  margin-bottom: var(--spacing-sm);
}

.comment-author {
  font-weight: 600;
  color: var(--accent-cyan);
}

.comment-meta {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: var(--spacing-sm);
}

.comment-content p {
  margin-bottom: 0.5rem;
}

/* ========================================
   Archive Grid Layout - 归档网格布局增强
   ======================================== */
.archive-content {
  padding: var(--spacing-lg) 0;
}

.archive-content .services-grid {
  margin-bottom: var(--spacing-lg);
}

/* ========================================
   Accessibility - 无障碍访问
   ======================================== */
.screen-reader-text {
  clip: rect(1px, 1px, 1px, 1px);
  position: absolute !important;
  height: 1px;
  width: 1px;
  overflow: hidden;
  word-wrap: normal !important;
}

.screen-reader-text:focus {
  background-color: var(--bg-card);
  border-radius: var(--radius-sm);
  clip: auto !important;
  color: var(--text-primary);
  display: block;
  font-size: 1rem;
  height: auto;
  left: 5px;
  line-height: normal;
  padding: 15px 23px 14px;
  text-decoration: none;
  top: 5px;
  width: auto;
  z-index: 100000;
}

/* ========================================
   Print Styles - 打印样式
   ======================================== */
@media print {
  .site-header,
  .site-footer,
  .back-to-top,
  .post-navigation,
  .comments-area {
    display: none;
  }
  
  body {
    background: white;
    color: black;
  }
  
  .card {
    background: white;
    box-shadow: none;
  }
}