/* 松果工具箱 - 主样式表 */
/* 设计原则：简洁现代 + 流畅动画 + 响应式优先 */

:root {
  /* 主色调 - 松果棕 + 科技蓝 */
  --primary-brown: #8B4513;
  --primary-blue: #4A90D9;
  --accent-gold: #D4AF37;
  --gray-light: #F5F5F5;
  --gray-dark: #4A4A4A;
  
  /* 渐变色 */
  --gradient-main: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-brown: linear-gradient(135deg, #8B4513 0%, #A0522D 100%);
  --gradient-blue: linear-gradient(135deg, #4A90D9 0%, #357ABD 100%);
  --gradient-orange: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  
  /* 背景色 */
  --bg-primary: #f8f9fa;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  
  /* 文字色 */
  --text-primary: #2d3748;
  --text-secondary: #4a5568;
  --text-muted: #718096;
  
  /* 阴影 */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 25px rgba(0,0,0,0.15);
  --shadow-xl: 0 20px 40px rgba(0,0,0,0.2);
  
  /* 圆角 */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  
  /* 过渡 */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* ===== 基础重置 ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition-fast);
}

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

/* ===== 头部 ===== */
.header {
  background: var(--gradient-main);
  padding: 16px 0;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-md);
  transition: var(--transition-normal);
}

.header.scrolled {
  padding: 12px 0;
  box-shadow: var(--shadow-lg);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  color: white;
  font-size: 22px;
  font-weight: 700;
  transition: var(--transition-normal);
  text-decoration: none;
}

.logo:hover {
  transform: scale(1.05);
  opacity: 0.9;
}

.logo-img {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
  background: white;
  padding: 2px;
}

.logo-emoji {
  font-size: 32px;
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-4px); }
}

.nav-menu {
  display: flex;
  gap: 8px;
  list-style: none;
  align-items: center;
}

.nav-menu a {
  color: white;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
  font-size: 15px;
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.nav-menu a::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--primary-orange);
  transition: var(--transition-fast);
  transform: translateX(-50%);
}

.nav-menu a:hover {
  background: rgba(255,255,255,0.15);
  transform: translateY(-2px);
}

.nav-menu a:hover::before {
  width: 80%;
}

/* 汉堡菜单 */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  z-index: 1001;
}

.hamburger span {
  width: 24px;
  height: 3px;
  background: white;
  border-radius: 2px;
  transition: var(--transition-fast);
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

.mobile-nav {
  display: none;
  position: fixed;
  top: 0;
  right: -100%;
  width: 280px;
  height: 100vh;
  background: var(--gradient-main);
  padding: 80px 30px 30px;
  transition: var(--transition-normal);
  z-index: 999;
  box-shadow: var(--shadow-xl);
}

.mobile-nav.active {
  right: 0;
}

.mobile-nav a {
  display: block;
  color: white;
  padding: 14px 0;
  font-size: 18px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  transition: var(--transition-fast);
}

.mobile-nav a:hover {
  padding-left: 10px;
  color: var(--primary-orange);
}

.overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.5);
  z-index: 998;
  opacity: 0;
  transition: var(--transition-fast);
}

.overlay.active {
  opacity: 1;
}

/* ===== 搜索框 ===== */
.search-container {
  margin: 30px auto;
  max-width: 600px;
  position: relative;
}

.search-box {
  display: flex;
  background: white;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  transition: var(--transition-normal);
}

.search-box:focus-within {
  box-shadow: var(--shadow-xl);
  transform: translateY(-2px);
}

.search-input {
  flex: 1;
  padding: 16px 24px;
  border: none;
  font-size: 16px;
  outline: none;
}

.search-btn {
  padding: 16px 32px;
  background: var(--gradient-blue);
  color: white;
  border: none;
  cursor: pointer;
  font-weight: 600;
  transition: var(--transition-fast);
}

.search-btn:hover {
  filter: brightness(1.1);
}

/* ===== 九宫格分类 ===== */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
  margin: 40px 0;
}

.category-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-md);
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(0,0,0,0.05);
}

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

.category-card::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: radial-gradient(circle, rgba(255,107,53,0.1) 0%, transparent 70%);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: all 0.6s ease;
}

.category-card:hover {
  transform: translateY(-10px) scale(1.02);
  box-shadow: 0 20px 40px rgba(139,90,43,0.25);
  border-color: rgba(255,107,53,0.3);
}

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

.category-card:hover::after {
  width: 400px;
  height: 400px;
}

.category-icon {
  font-size: 48px;
  margin-bottom: 16px;
  display: block;
}

.category-title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.category-count {
  color: var(--text-muted);
  font-size: 14px;
}

/* ===== 工具列表 ===== */
.tools-section {
  padding: 60px 0;
}

.section-title {
  font-size: 32px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 40px;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.tool-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  transition: all 0.35s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  display: flex;
  flex-direction: column;
  gap: 12px;
  border: 1px solid rgba(0,0,0,0.05);
  position: relative;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
}

.tool-card::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-orange);
  transform: scaleX(0);
  transition: var(--transition-normal);
}

.tool-card:hover {
  transform: translateY(-6px) scale(1.01);
  box-shadow: 0 15px 35px rgba(139,90,43,0.2);
  border-color: rgba(255,107,53,0.3);
}

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

.tool-header {
  display: flex;
  align-items: center;
  gap: 12px;
}

.tool-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  object-fit: contain;
  background: var(--bg-primary);
  padding: 4px;
}

.tool-name {
  font-weight: 600;
  font-size: 16px;
  color: var(--primary-blue);
}

.tool-url {
  font-size: 12px;
  color: var(--text-muted);
}

.tool-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
  flex: 1;
}

.tool-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.tool-tag {
  font-size: 11px;
  padding: 4px 8px;
  background: var(--bg-primary);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
}

/* ===== 广告位 ===== */
.ad-banner {
  background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin: 30px 0;
  text-align: center;
  color: white;
  font-weight: 600;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.8; }
}

.ad-slot {
  background: var(--bg-secondary);
  border: 2px dashed var(--text-muted);
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: center;
  color: var(--text-muted);
  margin: 20px 0;
}

/* ===== 底部 ===== */
.footer {
  background: var(--text-primary);
  color: white;
  padding: 40px 0 20px;
  margin-top: 60px;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 30px;
  margin-bottom: 30px;
}

.footer-section h4 {
  font-size: 16px;
  margin-bottom: 16px;
  color: var(--accent-gold);
}

.footer-section a {
  display: block;
  color: rgba(255,255,255,0.7);
  margin-bottom: 8px;
  transition: var(--transition-fast);
}

.footer-section a:hover {
  color: white;
  transform: translateX(5px);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 20px;
  text-align: center;
  color: rgba(255,255,255,0.5);
  font-size: 14px;
}

/* ===== 响应式 ===== */
@media (max-width: 992px) {
  .nav-menu {
    display: none;
  }
  
  .hamburger {
    display: flex;
  }
  
  .mobile-nav {
    display: block;
  }
  
  .overlay {
    display: block;
  }
  
  .categories-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }
  
  .logo span {
    font-size: 18px;
  }
  
  .logo-emoji {
    font-size: 28px;
  }
  
  .categories-grid {
    grid-template-columns: 1fr;
  }
  
  .tools-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .search-box {
    flex-direction: column;
  }
  
  .search-btn {
    width: 100%;
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 993px) {
  .mobile-nav,
  .overlay,
  .hamburger {
    display: none !important;
  }
}

/* ===== 加载动画 ===== */
.fade-in {
  animation: fadeIn 0.5s ease;
}

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

/* ===== 滚动条美化 ===== */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--primary-blue);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary-brown);
}