:root {
      --primary: #00b894;
      --secondary: #55efc4;
      --accent: #00cec9;
      --dark: #1a3c34;
      --light: #f7f7f7;
      --success: #00b894;
      --warning: #fdcb6e;
      --info: #0984e3;
      --gradient: linear-gradient(135deg, var(--primary), var(--secondary));
      --glow: 0 0 20px rgba(0, 184, 148, 0.5);
      --glow-accent: 0 0 20px rgba(0, 206, 201, 0.6);
    }

    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    }

    body {
      background: linear-gradient(-45deg, #0d3028, #1a3c34, #0f4c3a, #2d4a43);
      background-size: 400% 400%;
      animation: gradientShift 15s ease infinite;
      color: var(--light);
      line-height: 1.6;
      overflow-x: hidden;
      min-height: 100vh;
      opacity: 0;
      animation: fadeIn 1s ease forwards;
    }

    @keyframes fadeIn {
      to { opacity: 1; }
    }

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

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 20px;
    }

    /* 页面过渡遮罩 */
    .page-transition {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: var(--dark);
      z-index: 9999;
      display: flex;
      align-items: center;
      justify-content: center;
      transform: scaleY(0);
      transform-origin: bottom;
      transition: transform 0.6s cubic-bezier(0.77, 0, 0.175, 1);
    }
    
    .page-transition.active {
      transform: scaleY(1);
      transform-origin: top;
    }
    
    .transition-content {
      text-align: center;
      color: var(--light);
      opacity: 0;
      transition: opacity 0.3s ease;
    }
    
    .page-transition.active .transition-content {
      opacity: 1;
    }
    
    .transition-spinner {
      width: 50px;
      height: 50px;
      border: 3px solid rgba(255, 255, 255, 0.3);
      border-radius: 50%;
      border-top-color: var(--primary);
      margin: 0 auto 20px;
      animation: spin 1s linear infinite;
    }
    
    @keyframes spin {
      to { transform: rotate(360deg); }
    }

    /* 头部样式 */
    .header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 20px 0;
      margin-bottom: 30px;
      position: relative;
      transform: translateY(-30px);
      animation: slideDown 0.8s ease forwards;
    }

    @keyframes slideDown {
      to { transform: translateY(0); }
    }

    .header::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--gradient);
      box-shadow: var(--glow);
    }

    .logo-container {
      display: flex;
      align-items: center;
      gap: 15px;
    }

    .logo {
      width: 80px;
      height: 80px;
      border-radius: 50%;
      background: var(--gradient);
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-size: 2rem;
      box-shadow: var(--glow);
      transition: all 0.5s ease;
      position: relative;
      overflow: hidden;
    }

    .logo::after {
      content: '';
      position: absolute;
      top: -50%;
      left: -50%;
      width: 200%;
      height: 200%;
      background: linear-gradient(
        to bottom right,
        rgba(255, 255, 255, 0.3),
        rgba(255, 255, 255, 0)
      );
      transform: rotate(30deg);
      transition: all 0.5s ease;
    }

    .logo:hover {
      transform: scale(1.05) rotate(5deg);
      box-shadow: 0 0 30px rgba(0, 184, 148, 0.8);
    }

    .logo:hover::after {
      transform: rotate(0deg);
      top: 0;
      left: 0;
    }

    .site-title {
      font-size: 2.2rem;
      font-weight: 700;
      background: var(--gradient);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
      text-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
      position: relative;
      display: inline-block;
    }

    .site-title::after {
      content: '';
      position: absolute;
      bottom: -5px;
      left: 0;
      width: 0;
      height: 3px;
      background: var(--gradient);
      transition: width 0.5s ease;
    }

    .site-title:hover::after {
      width: 100%;
    }

    .site-subtitle {
      font-size: 1rem;
      color: var(--secondary);
      margin-top: 5px;
      position: relative;
      display: inline-block;
    }

    .site-subtitle::after {
      content: '';
      position: absolute;
      bottom: -2px;
      left: 0;
      width: 0;
      height: 1px;
      background: var(--secondary);
      transition: width 0.5s ease;
    }

    .site-subtitle:hover::after {
      width: 100%;
    }

    /* 统计信息 */
    .stats {
      display: flex;
      gap: 15px;
      flex-wrap: wrap;
    }

    .stat-item {
      background: rgba(255, 255, 255, 0.1);
      backdrop-filter: blur(10px);
      border-radius: 10px;
      padding: 10px 15px;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
      border: 1px solid rgba(255, 255, 255, 0.1);
      display: flex;
      align-items: center;
      gap: 8px;
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
    }

    .stat-item::before {
      content: '';
      position: absolute;
      top: 0;
      left: -100%;
      width: 100%;
      height: 100%;
      background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
      transition: left 0.5s ease;
    }

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

    .stat-item:hover {
      transform: translateY(-5px);
      box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
    }

    .stat-item i {
      color: var(--accent);
      font-size: 1.2rem;
    }

    /* 网格布局 */
    .grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
      gap: 25px;
      margin-bottom: 40px;
    }

    .card {
      background: rgba(255, 255, 255, 0.1);
      backdrop-filter: blur(15px);
      border-radius: 15px;
      padding: 25px;
      box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
      border: 1px solid rgba(255, 255, 255, 0.1);
      transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
      position: relative;
      overflow: hidden;
      opacity: 0;
      transform: translateY(50px) scale(0.8);
    }

    .card.fly-in {
      animation: cardFlyIn 0.8s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
    }

    @keyframes cardFlyIn {
      to {
        opacity: 1;
        transform: translateY(0) scale(1);
      }
    }

    .card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 5px;
      background: var(--gradient);
      transform: scaleX(0);
      transform-origin: left;
      transition: transform 0.5s ease;
    }

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

    .card::after {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: radial-gradient(circle at center, rgba(0, 184, 148, 0.1) 0%, transparent 70%);
      opacity: 0;
      transition: opacity 0.5s ease;
    }

    .card:hover::after {
      opacity: 1;
    }

    .card:hover {
      transform: translateY(-10px) scale(1.02);
      box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3), var(--glow);
    }

    .card h3 {
      font-size: 1.4rem;
      margin-bottom: 15px;
      color: var(--light);
      display: flex;
      align-items: center;
      gap: 10px;
      position: relative;
      z-index: 1;
    }

    .card h3 i {
      color: var(--accent);
      transition: transform 0.3s ease;
    }

    .card:hover h3 i {
      transform: scale(1.2);
    }

    .card-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
      gap: 15px;
    }

    /* 按钮样式 */
    .btn {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      padding: 12px 20px;
      border-radius: 10px;
      text-decoration: none;
      font-weight: 600;
      transition: all 0.3s ease;
      text-align: center;
      position: relative;
      overflow: hidden;
      z-index: 1;
      transform: translateY(0);
    }

    .btn::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 0%;
      height: 100%;
      background: rgba(255, 255, 255, 0.2);
      transition: all 0.3s ease;
      z-index: -1;
    }

    .btn:hover::before {
      width: 100%;
    }

    .btn::after {
      content: '';
      position: absolute;
      top: 50%;
      left: 50%;
      width: 0;
      height: 0;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.3);
      transform: translate(-50%, -50%);
      transition: width 0.3s ease, height 0.3s ease;
      z-index: -1;
    }

    .btn:active::after {
      width: 100px;
      height: 100px;
    }

    .btn-primary {
      background: var(--gradient);
      color: white;
      box-shadow: 0 4px 15px rgba(0, 184, 148, 0.4);
    }

    .btn-primary:hover {
      box-shadow: 0 6px 20px rgba(0, 184, 148, 0.6);
      transform: translateY(-3px);
    }

    .btn-secondary {
      background: rgba(255, 255, 255, 0.15);
      color: white;
      border: 1px solid rgba(255, 255, 255, 0.2);
    }

    .btn-secondary:hover {
      background: rgba(255, 255, 255, 0.25);
      transform: translateY(-3px);
    }

    .btn-accent {
      background: linear-gradient(135deg, var(--accent), #00a8a8);
      color: white;
      box-shadow: 0 4px 15px rgba(0, 206, 201, 0.4);
    }

    .btn-accent:hover {
      box-shadow: 0 6px 20px rgba(0, 206, 201, 0.6);
      transform: translateY(-3px);
    }

    /* 页脚样式 */
    .footer {
      text-align: center;
      padding: 30px 0;
      margin-top: 50px;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      position: relative;
      transform: translateY(30px);
      opacity: 0;
      animation: slideUp 0.8s ease 0.7s forwards;
    }

    @keyframes slideUp {
      to {
        transform: translateY(0);
        opacity: 1;
      }
    }

    .footer::before {
      content: '';
      position: absolute;
      top: 0;
      left: 50%;
      transform: translateX(-50%);
      width: 100px;
      height: 3px;
      background: var(--gradient);
    }

    .runtime {
      font-size: 1.1rem;
      margin: 20px 0;
      display: flex;
      justify-content: center;
      gap: 10px;
      flex-wrap: wrap;
    }

    .runtime span {
      background: rgba(255, 255, 255, 0.1);
      padding: 8px 15px;
      border-radius: 30px;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
      transition: all 0.3s ease;
    }

    .runtime span:hover {
      transform: translateY(-3px);
      box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
    }

    .copyright {
      color: var(--secondary);
      font-size: 0.9rem;
    }

    /* 通知样式 */
    .notification {
      position: fixed;
      bottom: 20px;
      right: 20px;
      width: 320px;
      background: rgba(255, 255, 255, 0.15);
      backdrop-filter: blur(15px);
      border-radius: 15px;
      padding: 20px;
      box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
      border: 1px solid rgba(255, 255, 255, 0.1);
      transform: translateX(150%) scale(0.8);
      transition: transform 0.5s cubic-bezier(0.68, -0.55, 0.27, 1.55);
      z-index: 1000;
      cursor: pointer;
    }

    .notification.active {
      transform: translateX(0) scale(1);
    }

    .notification h3 {
      color: var(--light);
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .notification p {
      color: var(--secondary);
      margin-bottom: 15px;
    }

    .close-btn {
      position: absolute;
      top: 15px;
      right: 15px;
      background: rgba(255, 255, 255, 0.2);
      width: 25px;
      height: 25px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      transition: all 0.3s ease;
    }

    .close-btn:hover {
      background: rgba(255, 255, 255, 0.3);
      transform: rotate(90deg) scale(1.1);
    }

    /* 关于本站模态框 */
    .modal-overlay {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: rgba(0, 0, 0, 0.7);
      display: flex;
      align-items: center;
      justify-content: center;
      z-index: 2000;
      opacity: 0;
      visibility: hidden;
      transition: all 0.3s ease;
    }

    .modal-overlay.active {
      opacity: 1;
      visibility: visible;
    }

    .modal {
      background: rgba(255, 255, 255, 0.15);
      backdrop-filter: blur(20px);
      border-radius: 20px;
      width: 90%;
      max-width: 500px;
      padding: 30px;
      box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
      border: 1px solid rgba(255, 255, 255, 0.2);
      transform: scale(0.8);
      transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
      position: relative;
      overflow: hidden;
    }

    .modal-overlay.active .modal {
      transform: scale(1);
    }

    .modal::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 5px;
      background: var(--gradient);
    }

    .modal-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 20px;
      padding-bottom: 15px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .modal-title {
      font-size: 1.5rem;
      color: var(--light);
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .modal-title i {
      color: var(--accent);
    }

    .modal-close {
      background: rgba(255, 255, 255, 0.15);
      width: 35px;
      height: 35px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      transition: all 0.3s ease;
    }

    .modal-close:hover {
      background: rgba(255, 255, 255, 0.25);
      transform: rotate(90deg);
    }

    .modal-content {
      color: var(--light);
      line-height: 1.8;
    }

    .modal-content p {
      margin-bottom: 15px;
    }

    .modal-highlight {
      color: var(--secondary);
      font-weight: 600;
    }

    .modal-email {
      background: rgba(255, 255, 255, 0.1);
      padding: 10px 15px;
      border-radius: 10px;
      margin: 15px 0;
      display: flex;
      align-items: center;
      gap: 10px;
      transition: all 0.3s ease;
    }

    .modal-email:hover {
      background: rgba(255, 255, 255, 0.15);
      transform: translateY(-3px);
    }

    .modal-email i {
      color: var(--accent);
    }

    .modal-footer {
      margin-top: 20px;
      text-align: center;
      color: var(--secondary);
      font-style: italic;
    }

    /* 响应式设计 */
    @media (max-width: 768px) {
      .header {
        flex-direction: column;
        gap: 20px;
        text-align: center;
      }
      
      .stats {
        justify-content: center;
      }
      
      .grid {
        grid-template-columns: 1fr;
      }
      
      .site-title {
        font-size: 1.8rem;
      }
      
      .card-grid {
        grid-template-columns: 1fr;
      }
      
      .modal {
        width: 95%;
        padding: 20px;
      }
    }

    /* 动画效果 */
    @keyframes float {
      0% { transform: translateY(0px); }
      50% { transform: translateY(-10px); }
      100% { transform: translateY(0px); }
    }

    .floating {
      animation: float 5s ease-in-out infinite;
    }

    /* 粒子背景 */
    .particles {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      z-index: -1;
      overflow: hidden;
    }

    .particle {
      position: absolute;
      background: rgba(255, 255, 255, 0.5);
      border-radius: 50%;
      pointer-events: none;
    }

    /* 点击涟漪效果 */
    .ripple {
      position: absolute;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.7);
      transform: scale(0);
      animation: ripple 0.6s linear;
      pointer-events: none;
    }

    @keyframes ripple {
      to {
        transform: scale(4);
        opacity: 0;
      }
    }