/* 餐厅行业 - 自定义CSS变量 */
:root {
  /* 主色调 - 红色和橙色，刺激食欲 */
  --primary-color: #EF4444;
  --primary-hover: #DC2626;
  --secondary-color: #F59E0B;
  --secondary-hover: #D97706;
  --accent-color: #10B981;
  --accent-hover: #059669;
  
  /* 中性色 */
  --bg-color: #FFFFFF;
  --bg-secondary: #F9FAFB;
  --text-primary: #1F2937;
  --text-secondary: #6B7280;
  --border-color: #E5E7EB;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  /* 过渡效果 */
  --transition: all 0.3s ease;
  --transition-fast: all 0.2s ease;
  
  /* 圆角 */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
}

/* 全局样式 */
body {
  font-family: 'Inter', sans-serif;
  color: var(--text-primary);
  background-color: var(--bg-color);
  line-height: 1.6;
}

/* 标题使用优雅的字体 */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Playfair Display', serif;
  font-weight: 700;
  line-height: 1.2;
}

/* 导航样式 */
header {
  background-color: var(--bg-color);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: var(--transition);
}

/* 导航链接样式 */
nav a {
  position: relative;
  transition: var(--transition-fast);
  color: var(--text-primary);
  font-weight: 500;
}

nav a:hover {
  color: var(--primary-color);
}

nav a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -4px;
  left: 0;
  background-color: var(--primary-color);
  transition: var(--transition);
}

nav a:hover::after {
  width: 100%;
}

/* 下拉菜单样式 */
.dropdown-menu {
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: var(--transition);
  position: absolute;
  background-color: var(--bg-color);
  box-shadow: var(--shadow-lg);
  border-radius: var(--radius-md);
  padding: 0.75rem 0;
  min-width: 160px;
  z-index: 99;
}

.dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-menu a {
  display: block;
  padding: 0.5rem 1rem;
  font-weight: 400;
  color: var(--text-primary);
  transition: var(--transition-fast);
}

.dropdown-menu a:hover {
  background-color: var(--bg-secondary);
  color: var(--primary-color);
}

.dropdown-menu a::after {
  display: none;
}

/* 移动端汉堡菜单 */
.mobile-menu-btn {
  cursor: pointer;
  transition: var(--transition);
}

.mobile-menu-btn span {
  display: block;
  width: 25px;
  height: 3px;
  background-color: var(--text-primary);
  margin: 5px 0;
  transition: var(--transition);
}

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

.mobile-menu-btn.active span:nth-child(2) {
  opacity: 0;
}

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

/* 移动端导航菜单 */
.mobile-menu {
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: var(--transition);
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background-color: var(--bg-color);
  box-shadow: var(--shadow-md);
  padding: 1rem;
  z-index: 99;
}

.mobile-menu.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.mobile-menu a {
  display: block;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border-color);
}

.mobile-menu a:last-child {
  border-bottom: none;
}

/* 按钮样式 */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  text-align: center;
  transition: var(--transition);
  cursor: pointer;
  border: none;
  font-size: 1rem;
}

.btn-primary {
  background-color: var(--primary-color);
  color: #FFFFFF;
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background-color: var(--secondary-color);
  color: #FFFFFF;
}

.btn-secondary:hover {
  background-color: var(--secondary-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-accent {
  background-color: var(--accent-color);
  color: #FFFFFF;
}

.btn-accent:hover {
  background-color: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-outline {
  background-color: transparent;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
}

.btn-outline:hover {
  background-color: var(--primary-color);
  color: #FFFFFF;
}

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

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

/* 菜品卡片特殊样式 */
.dish-card {
  position: relative;
  overflow: hidden;
}

.dish-card .dish-image {
  height: 250px;
  overflow: hidden;
}

.dish-card .dish-image img {
  transition: var(--transition);
}

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

.dish-card .dish-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(to bottom, rgba(0,0,0,0.0), rgba(0,0,0,0.7));
  opacity: 0;
  transition: var(--transition);
  display: flex;
  align-items: flex-end;
  padding: 2rem;
}

.dish-card:hover .dish-overlay {
  opacity: 1;
}

/* 轮播样式 */
.carousel {
  position: relative;
  overflow: hidden;
}

.carousel-inner {
  display: flex;
  transition: transform 0.5s ease;
}

.carousel-item {
  min-width: 100%;
  position: relative;
}

.carousel-control {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background-color: rgba(255, 255, 255, 0.9);
  border: none;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  z-index: 10;
}

.carousel-control:hover {
  background-color: #FFFFFF;
  box-shadow: var(--shadow-lg);
}

.carousel-control.prev {
  left: 1rem;
}

.carousel-control.next {
  right: 1rem;
}

/* 表单样式 */
.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: var(--text-primary);
}

.form-input {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 1rem;
  transition: var(--transition);
}

.form-input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 1rem;
  resize: vertical;
  min-height: 120px;
  transition: var(--transition);
}

.form-textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

/* 页脚样式 */
footer {
  background-color: var(--text-primary);
  color: #FFFFFF;
}

footer a {
  color: #FFFFFF;
  transition: var(--transition-fast);
}

footer a:hover {
  color: var(--secondary-color);
}

/* 响应式设计 */
@media (max-width: 1023px) {
  /* 平板设备样式 */
  .dish-card .dish-image {
    height: 200px;
  }
}

@media (max-width: 767px) {
  /* 移动设备样式 */
  .dish-card .dish-image {
    height: 180px;
  }
  
  .btn {
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
  }
}

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

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

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

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

/* 滚动动画 */
.fade-in {
  animation: fadeIn 0.6s ease forwards;
}

.slide-in-left {
  animation: slideInLeft 0.6s ease forwards;
}

.slide-in-right {
  animation: slideInRight 0.6s ease forwards;
}

/* 延迟动画 */
.delay-100 {
  animation-delay: 0.1s;
}

.delay-200 {
  animation-delay: 0.2s;
}

.delay-300 {
  animation-delay: 0.3s;
}

.delay-400 {
  animation-delay: 0.4s;
}

.delay-500 {
  animation-delay: 0.5s;
}

/* 滚动触发动画 */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: var(--transition);
}

.animate-on-scroll.animated {
  opacity: 1;
  transform: translateY(0);
}

/* 计数器动画 */
.counter {
  font-weight: 700;
  font-size: 2rem;
}

/* 返回顶部按钮 */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background-color: var(--primary-color);
  color: #FFFFFF;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 99;
}

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

.back-to-top:hover {
  background-color: var(--primary-hover);
  transform: translateY(-5px);
}

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

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

/* 标签样式 */
.tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  transition: var(--transition);
}

.tag-primary {
  background-color: rgba(239, 68, 68, 0.1);
  color: var(--primary-color);
}

.tag-secondary {
  background-color: rgba(245, 158, 11, 0.1);
  color: var(--secondary-color);
}

.tag-accent {
  background-color: rgba(16, 185, 129, 0.1);
  color: var(--accent-color);
}

/* 分隔线样式 */
.divider {
  position: relative;
  text-align: center;
  margin: 3rem 0;
}

.divider::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 1px;
  background-color: var(--border-color);
  z-index: 1;
}

.divider::after {
  content: '✦';
  position: relative;
  display: inline-block;
  padding: 0 1rem;
  background-color: var(--bg-color);
  color: var(--primary-color);
  font-size: 1.5rem;
  z-index: 2;
}