@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

* {
  box-sizing: border-box;
}

html {
  height: 100%;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  margin: 0;
  font-family: 'Source Sans Pro', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: #f8f9fa;
  color: #2d3748;
  line-height: 1.6;
  padding-top: 67px;
}

.main-container {
  flex: 1;
  position: relative;
  z-index: 1;
}

.hero-section {
  background: #f8f9fa;
  color: #333;
  padding: 3rem 0 2rem;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: none;
}

.hero-section::before {
  display: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 700px;
  margin: 0 auto;
}

.hero-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  text-shadow: none;
  font-family: 'Playfair Display', Georgia, serif;
  animation: fadeInUp 0.8s ease-out;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: #666;
  font-weight: 400;
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

/* 添加下划线装饰，与作品集一致 */
.hero-content::after {
  content: '';
  position: absolute;
  bottom: -15px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background-color: #ffda58;
  border-radius: 2px;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.content-container {
  background: #ffffff;
  border-radius: 0;
  margin-top: 2rem;
  position: relative;
  z-index: 2;
  padding: 3rem 0;
  box-shadow: none;
}

.filter-section {
  background: white;
  border-radius: 16px;
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: 0 8px 32px rgba(0,0,0,0.06);
  border: 1px solid rgba(0,0,0,0.05);
  position: relative;
  overflow: hidden;
}

.filter-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #ffda58, #4facfe, #00f2fe, #a18cd1, #ff7eb3, #ff758c);
  background-size: 600% 100%;
  animation: gradientShift 15s ease infinite;
}

@keyframes gradientShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.search-container {
  position: relative;
  margin-bottom: 1.5rem;
}

.search-input {
  width: 100%;
  padding: 1rem 1rem 1rem 3rem;
  border: 2px solid #e2e8f0;
  border-radius: 12px;
  font-size: 1rem;
  transition: all 0.3s ease;
  background: white;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}

.search-input:focus {
  outline: none;
  border-color: #ffda58;
  box-shadow: 0 0 0 3px rgba(255, 218, 88, 0.25), 0 4px 16px rgba(0,0,0,0.05);
  transform: translateY(-1px);
}

.search-icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: #94a3b8;
  font-size: 1.2rem;
}

.tag-container {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding: 1.5rem 0 0;
  border-top: 1px solid #e2e8f0;
}

/* 基础标签样式 */
.tag-item {
  background: linear-gradient(135deg, #f8fafc, #e2e8f0);
  color: #475569;
  border: 2px solid transparent;
  border-radius: 25px;
  padding: 0.6rem 1.2rem;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  text-decoration: none;
  user-select: none;
}

.tag-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
  transition: left 0.5s;
}

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

/* "所有文章"标签样式 */
.tag-item[data-slug="all"] {
  background: linear-gradient(135deg, #f8fafc, #e2e8f0);
  color: #475569;
}

/* 彩色标签样式 - 使用nth-child选择器为每个标签设置不同颜色 */
.tag-item:nth-of-type(10n+1):not([data-slug="all"]) {
  background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  color: #fff;
  border-color: rgba(255,255,255,0.3);
}

.tag-item:nth-of-type(10n+2):not([data-slug="all"]) {
  background: linear-gradient(135deg, #a18cd1 0%, #fbc2eb 100%);
  color: #fff;
  border-color: rgba(255,255,255,0.3);
}

.tag-item:nth-of-type(10n+3):not([data-slug="all"]) {
  background: linear-gradient(135deg, #ff7eb3 0%, #ff758c 100%);
  color: #fff;
  border-color: rgba(255,255,255,0.3);
}

.tag-item:nth-of-type(10n+4):not([data-slug="all"]) {
  background: linear-gradient(135deg, #84fab0 0%, #8fd3f4 100%);
  color: #2d3748;
  border-color: rgba(255,255,255,0.3);
}

.tag-item:nth-of-type(10n+5):not([data-slug="all"]) {
  background: linear-gradient(135deg, #f6d365 0%, #fda085 100%);
  color: #2d3748;
  border-color: rgba(255,255,255,0.3);
}

.tag-item:nth-of-type(10n+6):not([data-slug="all"]) {
  background: linear-gradient(135deg, #5ee7df 0%, #b490ca 100%);
  color: #fff;
  border-color: rgba(255,255,255,0.3);
}

.tag-item:nth-of-type(10n+7):not([data-slug="all"]) {
  background: linear-gradient(135deg, #d299c2 0%, #fef9d7 100%);
  color: #2d3748;
  border-color: rgba(255,255,255,0.3);
}

.tag-item:nth-of-type(10n+8):not([data-slug="all"]) {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #fff;
  border-color: rgba(255,255,255,0.3);
}

.tag-item:nth-of-type(10n+9):not([data-slug="all"]) {
  background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
  color: #2d3748;
  border-color: rgba(255,255,255,0.3);
}

.tag-item:nth-of-type(10n+10):not([data-slug="all"]) {
  background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
  color: #2d3748;
  border-color: rgba(255,255,255,0.3);
}

.tag-item:hover {
  transform: translateY(-2px) scale(1.05);
  box-shadow: 0 8px 25px rgba(255, 218, 88, 0.3);
  background: linear-gradient(135deg, #ffda58, #ffd333);
  color: #333;
  border-color: rgba(255,255,255,0.3);
  text-decoration: none;
}

.tag-item.active {
  background: linear-gradient(135deg, #ffda58, #ffd333);
  color: #333;
  border-color: rgba(255,255,255,0.3);
  box-shadow: 0 4px 20px rgba(255, 218, 88, 0.4);
  transform: translateY(-1px);
}

.section-title {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 2rem;
  color: #1a202c;
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 0;
  width: 60px;
  height: 4px;
  background: #ffda58;
  border-radius: 2px;
}

.section-subtitle {
  font-weight: 400; 
  color: #718096; 
  font-size: 1rem;
  margin-left: 0.5rem;
}

.articles-section {
  position: relative;
  min-height: 400px;
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 2rem;
  padding: 1rem 0;
}

.article-card {
  background: white;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid rgba(0,0,0,0.05);
  position: relative;
  text-decoration: none;
  color: inherit;
}

.article-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: #ffda58;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.article-card:hover {
  transform: translateY(-10px) scale(1.02);
  box-shadow: 0 20px 60px rgba(0,0,0,0.15);
  text-decoration: none;
  color: inherit;
}

.article-card:hover::before {
  opacity: 1;
}

.card-content {
  padding: 1.5rem;
}

.author-section {
  display: flex;
  align-items: center;
  margin-bottom: 1rem;
  opacity: 0.8;
}

.author-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  margin-right: 0.75rem;
  border: 2px solid #e2e8f0;
  transition: transform 0.3s ease;
  object-fit: cover;
}

.article-card:hover .author-avatar {
  transform: scale(1.1);
  border-color: #ffda58;
}

.author-info {
  flex: 1;
}

.author-name {
  font-weight: 600;
  color: #2d3748;
  margin: 0;
  font-size: 0.9rem;
}

.publish-date {
  color: #718096;
  font-size: 0.85rem;
  margin: 0;
}

.article-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: #1a202c;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-excerpt {
  color: #4a5568;
  font-size: 0.95rem;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.loading-spinner {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 60px;
  height: 60px;
  border: 4px solid #f3f4f6;
  border-top: 4px solid #ffda58;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  display: none;
  z-index: 10;
}

@keyframes spin {
  0% { transform: translate(-50%, -50%) rotate(0deg); }
  100% { transform: translate(-50%, -50%) rotate(360deg); }
}

.no-articles {
  text-align: center;
  padding: 4rem 2rem;
  color: #718096;
}

.no-articles-icon {
  font-size: 4rem;
  margin-bottom: 1rem;
  opacity: 0.5;
}

.error-message {
  text-align: center;
  padding: 4rem 2rem;
  color: #e53e3e;
}

.error-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  color: #e53e3e;
  opacity: 0.8;
}

#article-display-container {
  position: relative;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .hero-title {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .content-container {
    padding: 2rem 0;
    margin-top: -1rem;
  }

  .filter-section {
    margin: 1rem;
    padding: 1.5rem;
  }

  .article-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    padding: 0 1rem;
  }

  .container {
    padding: 0;
  }
}

/* 动画效果 */
.fade-in {
  animation: fadeIn 0.6s ease-out;
}

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

.stagger-children > * {
  animation: fadeInUp 0.6s ease-out both;
}

.stagger-children > *:nth-child(1) { animation-delay: 0.1s; }
.stagger-children > *:nth-child(2) { animation-delay: 0.2s; }
.stagger-children > *:nth-child(3) { animation-delay: 0.3s; }
.stagger-children > *:nth-child(4) { animation-delay: 0.4s; }
.stagger-children > *:nth-child(5) { animation-delay: 0.5s; }
.stagger-children > *:nth-child(6) { animation-delay: 0.6s; }

/* 重试按钮 */
.retry-button {
  margin-top: 1rem; 
  padding: 0.75rem 1.5rem; 
  background: linear-gradient(135deg, #ffda58, #ffd333); 
  color: #333; 
  border: none; 
  border-radius: 8px; 
  cursor: pointer; 
  font-weight: 500;
  transition: all 0.3s ease;
  box-shadow: 0 4px 10px rgba(255, 218, 88, 0.3);
}

.retry-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 15px rgba(255, 218, 88, 0.4);
}