/* 导入统一变量 */
@import url('./variables.css');

/* ===========================================================
   首页重新设计 - 现代化风格
   ========================================================= */

/* ===== 波浪背景动画 ===== */
.wave-top-bg {
  position: relative;
  height: auto;
  overflow: hidden;
  line-height: 0;
  z-index: 1;
  margin-bottom: -10px;
}

.wave-top-bg svg {
  animation: waveFloat 6s ease-in-out infinite;
}

.wave-bottom-bg {
  position: relative;
  height: auto;
  overflow: hidden;
  line-height: 0;
  z-index: 1;
  margin-top: -10px;
}

.wave-bottom-bg svg {
  animation: waveFloat 6s ease-in-out infinite reverse;
}

@keyframes waveFloat {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
}

/* ===== 主内容区域 ===== */
.main-content-bg {
  background: var(--gradient-primary) !important;
  position: relative;
  overflow: hidden;
  padding: var(--spacing-3xl) 0;
}

.main-content-bg::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="1" fill="%23ffffff" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
  pointer-events: none;
}

.main-content-bg .container {
  max-width: 1200px;
  padding-left: var(--spacing-3xl);
  padding-right: var(--spacing-3xl);
  position: relative;
  z-index: 2;
}

/* ===== 英雄区域设计 ===== */
.hero-section {
  position: relative;
  padding: var(--spacing-3xl) 0;
}

.hero-content {
  position: relative;
  z-index: 3;
}

.hero-title {
  font-size: var(--font-size-5xl);
  font-weight: 900;
  color: #ffffff !important;
  margin-bottom: var(--spacing-lg);
  line-height: var(--line-height-tight);
  text-shadow: 2px 4px 8px rgba(0,0,0,0.3);
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: var(--font-size-xl);
  color: #ffffff !important;
  margin-bottom: var(--spacing-xl);
  line-height: var(--line-height-relaxed);
  opacity: 0.95;
  font-weight: 500;
  text-shadow: 1px 2px 4px rgba(0,0,0,0.2);
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.hero-btn {
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--radius-full);
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
}

.hero-btn-primary {
  background: linear-gradient(135deg, #2ecc71 0%, #27ae60 100%) !important;
  color: #ffffff !important;
  border: none;
  font-weight: 700;
  box-shadow: 0 6px 20px rgba(46, 204, 113, 0.4);
  text-shadow: 0 1px 2px rgba(0,0,0,0.1);
}

.hero-btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(39, 174, 96, 0.4);
  color: #ffffff !important;
}

.hero-btn-secondary {
  background: rgba(255, 255, 255, 0.95) !important;
  color: #2c3e50 !important;
  border: 3px solid #ffffff;
  backdrop-filter: blur(10px);
  font-weight: 700;
  text-shadow: none;
}

.hero-btn-secondary:hover {
  background: #2c3e50 !important;
  color: #ffffff !important;
  border-color: #2c3e50;
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(44, 62, 80, 0.4);
}

.hero-image {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md) !important;
  transition: var(--transition-normal);
}

.hero-image:hover {
  transform: translateY(-10px) scale(1.02);
  box-shadow: var(--shadow-lg) !important;
}

.hero-image img {
  width: 100%;
  height: auto;
  transition: var(--transition-normal);
}

.hero-image:hover img {
  transform: scale(1.1);
}

/* ===== 特色内容区域 ===== */
.feature-section {
  padding: var(--spacing-3xl) 0;
  background: transparent !important;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-title {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  color: #ffffff !important;
  margin-bottom: var(--spacing-md);
  text-shadow: 2px 4px 8px rgba(0,0,0,0.3);
  letter-spacing: -0.01em;
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: #ffffff !important;
  max-width: 600px;
  margin: 0 auto;
  font-weight: 500;
  opacity: 0.9;
  text-shadow: 1px 2px 4px rgba(0,0,0,0.2);
}

/* ===== 文章卡片设计 ===== */
.article-card {
  background: var(--bg-card) !important;
  backdrop-filter: blur(20px);
  border-radius: var(--radius-3xl);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
  box-shadow: var(--shadow-md) !important;
  transition: var(--transition-normal);
  border: 1px solid rgba(255, 255, 255, 0.2);
  position: relative;
  overflow: hidden;
  color: var(--text-main) !important;
  display: flex;
  align-items: stretch;
}

.article-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-success) !important;
  transform: scaleX(0);
  transition: var(--transition-normal);
}

.article-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg) !important;
}

.article-card:hover::before {
  transform: scaleX(1);
}

.article-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--text-main) !important;
  margin-bottom: var(--spacing-sm);
  line-height: var(--line-height-tight);
}

.article-subtitle {
  font-size: var(--font-size-lg);
  color: var(--text-main) !important;
  margin-bottom: var(--spacing-md);
  font-weight: 500;
}

.article-summary {
  color: var(--text-main) !important;
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-lg);
}

.article-link {
  color: var(--primary-color) !important;
  font-weight: 600;
  text-decoration: none;
  position: relative;
  transition: var(--transition-normal);
}

.article-link::after {
  content: '→';
  margin-left: var(--spacing-sm);
  transition: var(--transition-normal);
}

.article-link:hover {
  color: var(--secondary-color) !important;
}

.article-link:hover::after {
  transform: translateX(5px);
}

/* ===== 文章内容预览 ===== */
.article-content-preview {
  color: #4a5568;
  font-size: var(--font-size-lg);
  line-height: var(--line-height-relaxed);
  background: rgba(248, 249, 250, 0.8);
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg) var(--spacing-xl);
  min-height: 4.5rem;
  max-height: 6.5rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: normal;
  display: flex;
  align-items: center;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
  border: 1px solid rgba(0,0,0,0.05);
}

/* ===== 侧边栏卡片设计 ===== */
.sidebar-card {
  background: var(--bg-card) !important;
  backdrop-filter: blur(20px);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
  box-shadow: var(--shadow-md) !important;
  transition: var(--transition-normal);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--text-main) !important;
}

.sidebar-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg) !important;
}

.sidebar-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--text-main) !important;
  margin-bottom: var(--spacing-lg);
  text-transform: uppercase;
  letter-spacing: 1px;
  position: relative;
}

.sidebar-title::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 0;
  width: 40px;
  height: 3px;
  background: var(--gradient-success) !important;
  border-radius: var(--radius-sm);
}

/* ===== 分类标签设计 ===== */
.category-tag {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  margin: var(--spacing-xs);
  background: transparent !important;
  color: var(--info-color) !important;
  text-decoration: none;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: var(--font-size-sm);
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
  border: 2px solid var(--info-color);
}

.category-tag::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: var(--transition-normal);
}

.category-tag:hover {
  color: var(--success-color) !important;
  border-color: var(--success-color);
  transform: translateY(-2px);
}

.category-tag:hover::before {
  left: 100%;
}

/* ===== 热门文章列表 ===== */
.popular-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.popular-item {
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid var(--border-light);
  transition: var(--transition-normal);
}

.popular-item:last-child {
  border-bottom: none;
}

.popular-item:hover {
  transform: translateX(10px);
}

.popular-link {
  color: var(--text-main) !important;
  text-decoration: none;
  font-weight: 600;
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  transition: var(--transition-normal);
  display: block;
}

.popular-link:hover {
  color: var(--primary-color) !important;
}

/* ===== 统计项样式 ===== */
.stat-item {
  padding: var(--spacing-md);
  text-align: center;
}

.stat-number {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: var(--spacing-sm);
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  font-weight: 500;
}

/* ===== 页脚设计 ===== */
.footer-wave-bg {
  background: var(--gradient-primary) !important;
  position: relative;
  /* margin-top: var(--spacing-3xl); */
  overflow: hidden;
}

.footer-wave-svg {
  display: block;
  width: 100%;
  height: 120px;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-3xl) var(--spacing-xl);
  position: relative;
  z-index: 2;
}

.footer-brand {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--text-white) !important;
  margin-bottom: var(--spacing-sm);
}

.footer-signature {
  color: var(--text-secondary-dark) !important;
  font-size: var(--font-size-base);
  margin-bottom: var(--spacing-md);
}

.footer-section-title {
  color: var(--text-white) !important;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  text-transform: uppercase;
  letter-spacing: 1px;
}

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

.footer-list li {
  margin-bottom: var(--spacing-sm);
}

.footer-list a {
  color: var(--text-secondary-dark) !important;
  text-decoration: none;
  transition: var(--transition-normal);
}

.footer-list a:hover {
  color: var(--text-white) !important;
  transform: translateX(5px);
}

.footer-icons {
  margin-top: var(--spacing-xl);
}

.footer-icons a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-white) !important;
  border-radius: var(--radius-full);
  margin: 0 var(--spacing-sm);
  transition: var(--transition-normal);
  backdrop-filter: blur(10px);
}

.footer-icons a:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-3px);
  color: var(--text-white) !important;
}

/* ===== 响应式设计 ===== */
@media (max-width: 991.98px) {
  .main-content-bg .container {
    padding-left: var(--spacing-lg);
    padding-right: var(--spacing-lg);
  }
  
  .hero-title {
    font-size: var(--font-size-4xl);
  }
  
  .hero-subtitle {
    font-size: var(--font-size-lg);
  }
  
  .section-title {
    font-size: var(--font-size-3xl);
  }
  
  .article-card,
  .sidebar-card {
    padding: var(--spacing-lg);
  }
}

@media (max-width: 767.98px) {
  .main-content-bg .container {
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
  }
  
  .hero-title {
    font-size: var(--font-size-3xl);
  }
  
  .hero-buttons {
    flex-direction: column;
  }
  
  .hero-btn {
    text-align: center;
  }
  
  .section-title {
    font-size: var(--font-size-2xl);
  }
  
  .article-card,
  .sidebar-card {
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
  }
  
  .article-card {
    flex-direction: column;
  }
  
  .article-content-preview {
    font-size: var(--font-size-base);
    padding: var(--spacing-md);
    min-height: unset;
  }
  
  .footer-content {
    padding: var(--spacing-xl) var(--spacing-md);
    text-align: center;
  }
}