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

/* CSS变量定义 */
:root {
  --primary: #165DFF;
  --secondary: #36CFC9;
  --accent: #FF7D00;
  --success: #52C41A;
  --warning: #FAAD14;
  --danger: #FF4D4F;
  --dark: #1D2129;
  --dark-2: #4E5969;
  --light-1: #F2F3F5;
  --light-2: #E5E6EB;
  --light-3: #C9CDD4;
  --border-radius: 12px;
  --border-radius-lg: 20px;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.12);
  --transition: all 0.3s ease;
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
}

/* 基础样式重置 */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-family);
  font-size: 14px;
  line-height: 1.6;
  color: var(--dark);
  background-color: #fafafa;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 工具样式类 */
.text-gradient {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.bg-blur {
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.scrollbar-hide {
  -ms-overflow-style: none;
  scrollbar-width: none;
}

.scrollbar-hide::-webkit-scrollbar {
  display: none;
}

/* 导航栏样式 */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  transition: var(--transition);
  padding: 0.75rem 0;
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-sm);
}

.navbar-brand {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.navbar-brand:hover {
  color: var(--primary);
  text-decoration: none;
}

.brand-icon {
  width: 2.5rem;
  height: 2.5rem;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.2rem;
}

/* 搜索框样式 */
.search-container {
  position: relative;
  max-width: 400px;
  margin: 0 auto;
}

.search-input {
  width: 100%;
  padding: 0.75rem 1rem 0.75rem 2.5rem;
  border: 1px solid var(--light-2);
  border-radius: 50px;
  background: var(--light-1);
  font-size: 0.875rem;
  transition: var(--transition);
}

.search-input:focus {
  outline: none;
  border-color: var(--primary);
  background: white;
  box-shadow: 0 0 0 3px rgba(22, 93, 255, 0.1);
}

.search-icon {
  position: absolute;
  left: 0.875rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--dark-2);
  font-size: 0.875rem;
}

/* 按钮样式 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 50px;
  font-weight: 500;
  font-size: 0.875rem;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  gap: 0.5rem;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  color: white;
  text-decoration: none;
}

.btn-outline {
  background: white;
  color: var(--dark-2);
  border: 1px solid var(--light-2);
}

.btn-outline:hover {
  background: var(--light-1);
  color: var(--dark);
  text-decoration: none;
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.8rem;
}

/* 卡片样式 */
.card {
  background: white;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.card-img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  border-radius: var(--border-radius) var(--border-radius) 0 0;
}

.card-body {
  padding: 1.25rem;
}

.card-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--dark);
}

.card-text {
  color: var(--dark-2);
  font-size: 0.875rem;
  line-height: 1.5;
  margin-bottom: 1rem;
}

.card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 0.75rem;
  border-top: 1px solid var(--light-2);
}

/* 工具卡片样式 */
.tool-card {
  position: relative;
  overflow: hidden;
}

.tool-card .card-img {
  transition: transform 0.5s ease;
}

.tool-card:hover .card-img {
  transform: scale(1.1);
}

.tool-badge {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  padding: 0.25rem 0.75rem;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 500;
  color: white;
}

.tool-badge.hot {
  background: var(--danger);
}

.tool-badge.new {
  background: var(--accent);
}

.tool-badge.recommended {
  background: var(--success);
}

.tool-stats {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.8rem;
  color: var(--dark-2);
}

.tool-rating {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.rating-stars {
  color: var(--warning);
}

/* 分类标签样式 */
.category-tabs {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding: 0.5rem 0;
  margin-bottom: 2rem;
}

.category-tab {
  padding: 0.5rem 1.25rem;
  border-radius: 50px;
  background: white;
  color: var(--dark-2);
  text-decoration: none;
  white-space: nowrap;
  border: 1px solid var(--light-2);
  transition: var(--transition);
  font-size: 0.875rem;
  font-weight: 500;
}

.category-tab:hover,
.category-tab.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
  text-decoration: none;
}

/* 英雄区域样式 */
.hero {
  background: linear-gradient(135deg, rgba(22, 93, 255, 0.05), rgba(54, 207, 201, 0.05));
  border-radius: var(--border-radius-lg);
  padding: 3rem 2rem;
  margin: 2rem 0;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(22, 93, 255, 0.1), transparent);
  border-radius: 50%;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -50%;
  left: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(54, 207, 201, 0.1), transparent);
  border-radius: 50%;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 600px;
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}

.hero-description {
  font-size: 1.1rem;
  color: var(--dark-2);
  margin-bottom: 2rem;
  line-height: 1.6;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.5);
}

.hero-stat {
  text-align: center;
}

.hero-stat-number {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--primary);
  display: block;
}

.hero-stat-label {
  font-size: 0.875rem;
  color: var(--dark-2);
  margin-top: 0.25rem;
}

/* 快速入口样式 */
.quick-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1.5rem 0;
}

.quick-tool {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  background: white;
  border: 1px solid var(--light-2);
  border-radius: 50px;
  text-decoration: none;
  color: var(--dark);
  font-size: 0.875rem;
  font-weight: 500;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.quick-tool:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  color: var(--dark);
  text-decoration: none;
}

/* 网格布局 */
.grid {
  display: grid;
  gap: 1.5rem;
}

.grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

@media (min-width: 768px) {
  .md\:grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
  .md\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
  .md\:grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
}

@media (min-width: 1024px) {
  .lg\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
  .lg\:grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
  .lg\:grid-cols-5 { grid-template-columns: repeat(5, 1fr); }
  .lg\:grid-cols-6 { grid-template-columns: repeat(6, 1fr); }
}

/* 响应式工具类 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

@media (min-width: 768px) {
  .container {
    padding: 0 2rem;
  }
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-5 { margin-bottom: 1.25rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mb-8 { margin-bottom: 2rem; }

.mt-4 { margin-top: 1rem; }
.mt-6 { margin-top: 1.5rem; }
.mt-8 { margin-top: 2rem; }

.p-4 { padding: 1rem; }
.p-6 { padding: 1.5rem; }
.p-8 { padding: 2rem; }

.pt-20 { padding-top: 5rem; }
.pb-16 { padding-bottom: 4rem; }

/* 页脚样式 */
.footer {
  background: var(--dark);
  color: var(--light-3);
  padding: 4rem 0 2rem;
  margin-top: 4rem;
}

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

.footer-section h4 {
  color: white;
  font-weight: 600;
  margin-bottom: 1rem;
}

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

.footer-section ul li {
  margin-bottom: 0.5rem;
}

.footer-section ul li a {
  color: var(--light-3);
  text-decoration: none;
  transition: var(--transition);
}

.footer-section ul li a:hover {
  color: white;
}

.footer-bottom {
  border-top: 1px solid var(--dark-2);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

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

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  background: var(--dark-2);
  color: var(--light-3);
  border-radius: 50%;
  text-decoration: none;
  transition: var(--transition);
}

.social-link:hover {
  background: var(--primary);
  color: white;
}

/* 返回顶部按钮 */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 3rem;
  height: 3rem;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: var(--transition);
  opacity: 0;
  visibility: hidden;
  z-index: 1000;
}

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

.back-to-top:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* 动画 */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fade-in-up {
  animation: fadeInUp 0.5s ease-out;
}

/* 移动端优化 */
@media (max-width: 767px) {
  .hero {
    padding: 2rem 1rem;
  }
  
  .hero-title {
    font-size: 1.75rem;
  }
  
  .quick-tools {
    justify-content: center;
  }
  
  .category-tabs {
    justify-content: flex-start;
  }
  
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

/* 加载状态 */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: white;
  animation: spin 1s ease-in-out infinite;
}

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

/* 工具提示 */
.tooltip {
  position: relative;
  cursor: help;
}

.tooltip::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--dark);
  color: white;
  padding: 0.5rem;
  border-radius: var(--border-radius);
  font-size: 0.75rem;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 1000;
}

.tooltip:hover::after {
  opacity: 1;
  visibility: visible;
}

/* 模态框样式 */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  box-sizing: border-box;
}

.modal-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  cursor: pointer;
}

.modal-content {
  position: relative;
  background: white;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 600px;
  max-height: 90vh;
  overflow: hidden;
  animation: modalSlideIn 0.3s ease-out;
  z-index: 2001;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem;
  border-bottom: 1px solid var(--light-2);
}

.modal-header h3 {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--dark);
}

.modal-header button {
  color: var(--dark-2);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  transition: var(--transition);
}

.modal-header button:hover {
  color: var(--dark);
}

.modal-body {
  padding: 1.5rem;
  max-height: calc(90vh - 180px);
  overflow-y: auto;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
  padding: 1.5rem;
  border-top: 1px solid var(--light-2);
  background: var(--light-1);
}

/* 表单组样式 */
.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--dark);
  font-size: 0.875rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--light-2);
  border-radius: var(--border-radius);
  font-size: 0.875rem;
  transition: var(--transition);
  box-sizing: border-box;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(22, 93, 255, 0.1);
}

.form-group input[type="checkbox"] {
  width: auto;
  margin-right: 0.5rem;
}

.form-group textarea {
  resize: vertical;
  min-height: 80px;
}

/* 模态框动画 */
@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: translateY(-20px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* Toast 提示样式 */
.toast {
  position: fixed;
  top: 2rem;
  right: 2rem;
  background: white;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
  padding: 1rem 1.5rem;
  z-index: 3000;
  transform: translateX(100%);
  opacity: 0;
  transition: all 0.3s ease;
  max-width: 400px;
  border-left: 4px solid var(--primary);
}

.toast.show {
  transform: translateX(0);
  opacity: 1;
}

.toast-content {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.toast-content i {
  font-size: 1.2rem;
}

.toast-success {
  border-left-color: var(--success);
}

.toast-success .toast-content i {
  color: var(--success);
}

.toast-error {
  border-left-color: var(--danger);
}

.toast-error .toast-content i {
  color: var(--danger);
}

.toast-warning {
  border-left-color: var(--warning);
}

.toast-warning .toast-content i {
  color: var(--warning);
}

.toast-info {
  border-left-color: var(--primary);
}

.toast-info .toast-content i {
  color: var(--primary);
}

/* 响应式调整 */
@media (max-width: 768px) {
  .modal {
    padding: 0.5rem;
  }
  
  .modal-content {
    max-width: 100%;
    max-height: 95vh;
  }
  
  .modal-header,
  .modal-body,
  .modal-footer {
    padding: 1rem;
  }
  
  .modal-footer {
    flex-direction: column-reverse;
  }
  
  .modal-footer .btn {
    width: 100%;
    justify-content: center;
  }
  
  .toast {
    top: 1rem;
    right: 1rem;
    left: 1rem;
    max-width: none;
  }
}