/* 浆果红色调渐进式交互主题 */
:root {
    --primary: #ff2d55;
    --primary-light: #ff6b81;
    --secondary: #6a1b9a;
    --dark: #2b2d42;
    --light: #f8f9fa;
    --text: #333;
    --transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.1);
  }
  
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, sans-serif;
  }
  
  body {
    background-color: var(--light);
    color: var(--text);
    line-height: 1.7;
    overflow-x: hidden;
  }
  
  /* 动态波浪形头部 */
  header {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    padding: 2rem 0;
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 30px rgba(214, 41, 97, 0.2);
  }
  
  header::before {
    content: '';
    position: absolute;
    bottom: -50px;
    left: 0;
    width: 100%;
    height: 100px;
    background: url('data:image/svg+xml;utf8,<svg viewBox="0 0 1200 120" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="none"><path d="M0,0V46.29c47.79,22.2,103.59,32.17,158,28,70.36-5.37,136.33-33.31,206.8-37.5C438.64,32.43,512.34,53.67,583,72.05c69.27,18,138.3,24.88,209.4,13.08,36.15-6,69.85-17.84,104.45-29.34C989.49,25,1113-14.29,1200,52.47V0Z" fill="%23f8f9fa" opacity=".25"/><path d="M0,0V15.81C13,36.92,27.64,56.86,47.69,72.05,99.41,111.27,165,111,224.58,91.58c31.15-10.15,60.09-26.07,89.67-39.8,40.92-19,84.73-46,130.83-49.67,36.26-2.85,70.9,9.42,98.6,31.56,31.77,25.39,62.32,62,103.63,73,40.44,10.79,81.35-6.69,119.13-24.28s75.16-39,116.92-43.05c59.73-5.85,113.28,22.88,168.9,38.84,30.2,8.66,59,6.17,87.09-7.5,22.43-10.89,48-26.93,60.65-49.24V0Z" fill="%23f8f9fa" opacity=".5"/><path d="M0,0V5.63C149.93,59,314.09,71.32,475.83,42.57c43-7.64,84.23-20.12,127.61-26.46,59-8.63,112.48,12.24,165.56,35.4C827.93,77.22,886,95.24,951.2,90c86.53-7,172.46-45.71,248.8-84.81V0Z" fill="%23f8f9fa"/></svg>');
    background-size: cover;
    z-index: 1;
  }
  
  .header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    position: relative;
    z-index: 2;
  }
  
  .logo {
    font-size: 2rem;
    font-weight: 700;
    color: white;
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
    transition: var(--transition);
  }
  
  .logo:hover {
    transform: scale(1.05);
  }
  
  nav ul {
    display: flex;
    list-style: none;
    gap: 1.5rem;
  }
  
  nav ul li a {
    color: white;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 50px;
    transition: var(--transition);
  }
  
  nav ul li a:hover {
    background: rgba(255,255,255,0.2);
    transform: translateY(-3px);
  }
  
  /* 渐进式加载动画 */
  @keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
  }
  
  .container {
    max-width: 1200px;
    margin: 3rem auto;
    padding: 0 2rem;
    animation: fadeIn 0.6s forwards;
  }
  
  .main-content {
    background: white;
    border-radius: 16px;
    padding: 2.5rem;
    margin-bottom: 3rem;
    box-shadow: 0 10px 30px rgba(214, 41, 97, 0.1);
    transition: var(--transition);
  }
  
  .main-content:hover {
    box-shadow: 0 15px 40px rgba(214, 41, 97, 0.15);
  }
  
  .section-title {
    font-size: 1.75rem;
    margin-bottom: 2rem;
    color: var(--primary);
    position: relative;
    display: inline-block;
  }
  
  .section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 50px;
    height: 4px;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    border-radius: 2px;
  }
  
  /* 3D卡片式文章列表 */
  .article-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
  }
  
  .article-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(214, 41, 97, 0.1);
    transition: var(--transition);
    transform-style: preserve-3d;
    position: relative;
  }
  
  .article-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, var(--primary), var(--secondary));
    opacity: 0;
    transition: var(--transition);
    z-index: -1;
  }
  
  .article-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 15px 30px rgba(214, 41, 97, 0.2);
  }
  
  .article-card:hover::before {
    opacity: 0.1;
    transform: rotate(5deg) scale(1.1);
  }
  
  .card-image {
    width: 100%;
    height: 180px;
    object-fit: cover;
    border-bottom: 1px solid rgba(0,0,0,0.1);
    transition: var(--transition);
  }
  
  .article-card:hover .card-image {
    transform: scale(1.05);
  }
  
  .card-body {
    padding: 1.5rem;
  }
  
  .card-title {
    font-size: 1.2rem;
    margin-bottom: 0.75rem;
    color: var(--dark);
    transition: var(--transition);
  }
  
  .article-card:hover .card-title {
    color: var(--primary);
  }
  
  .card-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: #666;
    margin-top: 1rem;
  }
  
  .category-tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: linear-gradient(to right, var(--primary), var(--primary-light));
    color: white;
    border-radius: 50px;
    font-size: 0.75rem;
    margin-bottom: 1rem;
    box-shadow: 0 2px 5px rgba(214, 41, 97, 0.3);
  }
  
  /* 文章详情页 */
  .article-detail {
    max-width: 800px;
    margin: 0 auto;
  }
  
  .article-header {
    text-align: center;
    margin-bottom: 3rem;
  }
  
  .article-title {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: var(--dark);
    line-height: 1.3;
  }
  
  .article-meta {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    margin-bottom: 2rem;
    color: #666;
  }
  
  .article-image {
    width: 100%;
    max-height: 450px;
    object-fit: cover;
    border-radius: 12px;
    margin-bottom: 2rem;
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    transition: var(--transition);
  }
  
  .article-image:hover {
    transform: scale(1.01);
    box-shadow: 0 15px 30px rgba(0,0,0,0.15);
  }
  
  .article-content {
    line-height: 1.8;
    font-size: 1.1rem;
  }
  
  .article-content p {
    margin-bottom: 1.5rem;
  }
  
  /* 分页导航 */
  .pagination {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 3rem;
  }
  
  .pagination a {
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    background: white;
    color: var(--primary);
    border: 1px solid var(--primary);
    transition: var(--transition);
    font-weight: 500;
  }
  
  .pagination a:hover {
    background: linear-gradient(to right, var(--primary), var(--primary-light));
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(214, 41, 97, 0.3);
  }
  
  /* 友情链接 */
  .friend-links {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    margin: 3rem 0;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
  }
  
  .friend-links h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--primary);
  }
  
  .friend-links-container {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
  }
  
  .friend-links-container a {
    padding: 0.5rem 1rem;
    background: rgba(214, 41, 97, 0.1);
    border-radius: 50px;
    color: var(--primary);
    transition: var(--transition);
  }
  
  .friend-links-container a:hover {
    background: linear-gradient(to right, var(--primary), var(--primary-light));
    color: white;
    transform: translateY(-2px);
  }
  
  /* 页脚 */
  footer {
    background: linear-gradient(135deg, var(--dark), #1a1a2e);
    color: white;
    padding: 3rem 0;
    text-align: center;
    margin-top: 3rem;
  }
  
  .copyright {
    font-size: 0.9rem;
    opacity: 0.8;
  }
  
  /* 响应式设计 */
  @media (max-width: 768px) {
    .header-content {
      flex-direction: column;
      gap: 1.5rem;
    }
    
    nav ul {
      flex-wrap: wrap;
      justify-content: center;
    }
    
    .article-grid {
      grid-template-columns: 1fr;
    }
    
    .article-title {
      font-size: 2rem;
    }
    
    .article-meta {
      gap: 1rem;
    }
  }
  
  /* 加载动画 */
  @keyframes pulse {
    0% { transform: scale(0.95); opacity: 0.6; }
    50% { transform: scale(1.05); opacity: 1; }
    100% { transform: scale(0.95); opacity: 0.6; }
  }
  
  .loading {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100px;
  }
  
  .loading-dot {
    width: 12px;
    height: 12px;
    margin: 0 5px;
    background-color: var(--primary);
    border-radius: 50%;
    animation: pulse 1.5s infinite ease-in-out;
  }
  
  .loading-dot:nth-child(2) {
    animation-delay: 0.3s;
  }
  
  .loading-dot:nth-child(3) {
    animation-delay: 0.6s;
  }