/* ========================================
   VANFUA梵花美学 - 公共样式
   ======================================== */

/* CSS Variables */
:root {
  /* 色彩系统 */
  --bg-primary: #F5F5F0;
  --text-primary: #2F4538;
  --accent: #8B4513;
  --accent-gold: #C8A464;
  --accent-hover: #2D5A4A;
  --coffee-accent: #D2691E;
  
  /* 茶类发酵色谱 */
  --tea-green: #90EE90;
  --tea-white: #F5F5DC;
  --tea-yellow: #DAA520;
  --tea-oolong: #D2691E;
  --tea-black: #8B4513;
  --tea-dark: #2F1B14;
  
  /* 辅助色 */
  --white: #FFFFFF;
  --gray-light: #E8E8E0;
  --gray: #999999;
  --gray-dark: #333333;
  --shadow: rgba(47, 69, 56, 0.1);
  --hot-red: #E74C3C;
  
  /* 字体 */
  --font-title: 'Noto Serif SC', 'Songti SC', serif;
  --font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-en: 'Playfair Display', Georgia, serif;
  
  /* 间距 */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-xxl: 4rem;
  
  /* 圆角 */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  
  /* 过渡 */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  width: 100%;
  max-width: 100vw;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

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

a:hover {
  color: var(--accent);
}

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-title);
  font-weight: 600;
  line-height: 1.4;
  color: var(--text-primary);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

.en-title {
  font-family: var(--font-en);
  font-style: italic;
  letter-spacing: 0.05em;
}

/* Layout */
.container {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.section {
  padding: var(--space-xxl) 0;
}

.section-title {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.section-title h2 {
  font-size: 2rem;
  margin-bottom: var(--space-xs);
}

.section-title .subtitle {
  font-size: 0.875rem;
  color: var(--gray);
  letter-spacing: 0.2em;
}

/* ========================================
   Header & Navigation
   ======================================== */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(245, 245, 240, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--gray-light);
  transition: all var(--transition-normal);
}

.header.scrolled {
  box-shadow: 0 2px 20px var(--shadow);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
  position: relative;
}

.logo {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.logo-main {
  font-family: var(--font-title);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: 0.1em;
}

.logo-sub {
  font-size: 0.625rem;
  color: var(--gray);
  letter-spacing: 0.15em;
}

/* 导航基础样式 */
.nav {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.nav-link {
  font-size: 0.875rem;
  color: var(--text-primary);
  padding: var(--space-xs) 0;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width var(--transition-normal);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

/* 汉堡菜单按钮 - 桌面端隐藏 */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 10001;
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--transition-fast);
  pointer-events: none;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: 0.75rem 1.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  letter-spacing: 0.05em;
}

.btn-primary {
  background: var(--accent);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--text-primary);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(47, 69, 56, 0.2);
}

.btn-outline {
  border: 1px solid var(--text-primary);
  color: var(--text-primary);
}

.btn-outline:hover {
  background: var(--text-primary);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(47, 69, 56, 0.2);
}

/* Product Image */
.product-img {
  aspect-ratio: 4/3;
  object-fit: cover;
  width: 100%;
  height: auto;
}

/* Cards */
.card {
  background: var(--white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 2px 10px var(--shadow);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px var(--shadow);
}

/* Tags */
.tag {
  display: inline-block;
  padding: 0.25rem 0.5rem;
  font-size: 0.75rem;
  border-radius: var(--radius-sm);
  background: var(--gray-light);
  color: var(--text-primary);
}

.tag-special {
  background: var(--coffee-accent);
  color: var(--white);
}

.tag-new {
  background: var(--tea-green);
  color: var(--text-primary);
}

.tag-hot {
  background: var(--hot-red);
  color: var(--white);
}

/* Footer */
.footer {
  background: var(--text-primary);
  color: var(--bg-primary);
  padding: var(--space-xl) 0 var(--space-md);
}

.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-xl);
  margin-bottom: var(--space-lg);
}

.footer-brand .logo-main {
  color: var(--bg-primary);
  margin-bottom: var(--space-sm);
}

.footer-brand p {
  font-size: 0.875rem;
  opacity: 0.8;
  line-height: 1.8;
}

.footer-title {
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: var(--space-md);
  color: var(--bg-primary);
}

.footer-links li {
  margin-bottom: var(--space-xs);
}

.footer-links a {
  font-size: 0.875rem;
  opacity: 0.8;
  transition: opacity var(--transition-fast);
}

.footer-links a:hover {
  opacity: 1;
}

.footer-bottom {
  text-align: center;
  padding-top: var(--space-md);
  border-top: 1px solid rgba(245, 245, 240, 0.1);
}

.footer-bottom p {
  font-size: 0.75rem;
  opacity: 0.6;
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

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

.modal-content {
  background: var(--white);
  border-radius: var(--radius-lg);
  max-width: 900px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  transform: scale(0.9);
  transition: transform var(--transition-normal);
}

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

.modal-close {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--gray-light);
  z-index: 10;
  transition: all var(--transition-fast);
}

.modal-close:hover {
  background: var(--accent);
  color: var(--white);
}

/* Loading Animation */
.lazy-image {
  opacity: 0;
  transition: opacity var(--transition-slow);
}

.lazy-image.loaded {
  opacity: 1;
}

/* Scroll to Top */
.scroll-top {
  position: fixed;
  bottom: var(--space-lg);
  right: var(--space-lg);
  width: 48px;
  height: 48px;
  background: var(--accent);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-normal);
  z-index: 999;
}

.scroll-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.scroll-top:hover {
  background: var(--text-primary);
}

/* ========================================
   导航下拉菜单样式
   ======================================== */

.nav-item {
  position: relative;
  height: 100%;
  display: flex;
  align-items: center;
}

.dropdown-arrow {
  font-size: 10px;
  margin-left: 5px;
  opacity: 0.6;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background: var(--bg-primary);
  min-width: 140px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
  border-radius: var(--radius-sm);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  padding: 8px 0;
  margin-top: 0;
  z-index: 1001;
}

.dropdown-menu a {
  display: block;
  padding: 12px 20px;
  color: var(--gray-dark);
  text-decoration: none;
  font-size: 14px;
  transition: all var(--transition-normal);
  white-space: nowrap;
}

.dropdown-menu a:hover {
  background: var(--accent-hover);
  color: var(--white);
}

/* 桌面端：hover 显示下拉菜单 */
@media (min-width: 769px) {
  .nav-item:hover .dropdown-menu,
  .nav-item.active .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
  }
}

/* 导航高亮样式 */
.nav-link.active {
  color: var(--accent-gold);
  font-weight: 500;
  position: relative;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--accent-gold);
}

.nav-link.active-parent {
  color: var(--accent-gold);
}

.dropdown-menu a.active {
  color: var(--accent-gold);
  background-color: rgba(200, 164, 100, 0.1);
  border-left: 3px solid var(--accent-gold);
  padding-left: 17px;
}

/* ========================================
   响应式布局
   ======================================== */

@media (max-width: 1024px) {
  .footer-inner {
    grid-template-columns: 1fr 1fr;
  }
}

/* ========================================
   移动端样式 (768px 以下)
   ======================================== */
@media (max-width: 768px) {
  
  /* 防止水平溢出 */
  html, body {
    overflow-x: hidden !important;
    width: 100% !important;
    max-width: 100vw !important;
  }
  
  .container {
    padding-left: 15px !important;
    padding-right: 15px !important;
    max-width: 100% !important;
  }
  
  /* 汉堡菜单按钮 - 强制显示 */
  .mobile-menu-btn {
    display: flex !important;
    position: absolute !important;
    top: 13px !important;
    right: 10px !important;
    z-index: 10001 !important;
    width: 44px !important;
    height: 44px !important;
    padding: 0 !important;
    margin: 0 !important;
    background: none !important;
    border: none !important;
    cursor: pointer !important;
    opacity: 1 !important;
    visibility: visible !important;
    pointer-events: auto !important;
  }
  
  .mobile-menu-btn span {
    display: block !important;
    width: 24px !important;
    height: 2px !important;
    background: var(--text-primary) !important;
    margin: 0 !important;
    pointer-events: none !important;
  }
  
  /* Header */
  .header-inner {
    position: relative !important;
  }
  
  .logo {
    max-width: calc(100% - 60px) !important;
  }

  /* 导航容器 - 全屏覆盖 */
  .nav {
    display: none !important;
    position: fixed !important;
    top: 70px !important;
    left: 0 !important;
    right: 0 !important;
    bottom: 0 !important;
    width: 100% !important;
    height: calc(100vh - 70px) !important;
    background: var(--bg-primary) !important;
    flex-direction: column !important;
    justify-content: flex-start !important;
    align-items: stretch !important;
    padding: 0 !important;
    margin: 0 !important;
    overflow-y: auto !important;
    z-index: 9999 !important;
  }
  
  .nav.active {
    display: flex !important;
  }
  
  /* 直接在 .nav 下的链接（无下拉菜单的） */
  .nav > .nav-link {
    display: block !important;
    width: 100% !important;
    padding: 16px 20px !important;
    font-size: 16px !important;
    color: var(--text-primary) !important;
    text-align: left !important;
    border-bottom: 1px solid rgba(47, 69, 56, 0.1) !important;
    box-sizing: border-box !important;
  }
  
  /* 导航项容器 */
  .nav-item {
    display: block !important;
    width: 100% !important;
    height: auto !important;
    border-bottom: 1px solid rgba(47, 69, 56, 0.1) !important;
    box-sizing: border-box !important;
  }
  
  /* 带下拉菜单的链接 */
  .nav-item > .nav-link {
    display: block !important;
    width: 100% !important;
    padding: 16px 20px !important;
    font-size: 16px !important;
    color: var(--text-primary) !important;
    text-align: left !important;
    box-sizing: border-box !important;
  }
  
  /* 下拉箭头 */
  .dropdown-arrow {
    float: right !important;
    margin-top: 6px !important;
    margin-left: 10px !important;
  }
  
  /* 下拉菜单 - 默认隐藏 */
  .dropdown-menu {
    display: none !important;
    position: static !important;
    width: 100% !important;
    background: rgba(47, 69, 56, 0.05) !important;
    padding: 0 !important;
    margin: 0 !important;
    box-shadow: none !important;
    border-radius: 0 !important;
    transform: none !important;
    opacity: 0 !important;
    visibility: hidden !important;
  }
  
  /* 下拉菜单 - 展开状态 */
  .nav-item.active .dropdown-menu {
    display: block !important;
    opacity: 1 !important;
    visibility: visible !important;
    transform: none !important;
    position: static !important;
  }
  
  /* 下拉菜单链接 */
  .dropdown-menu a {
    display: block !important;
    padding: 12px 30px !important;
    font-size: 14px !important;
    color: var(--text-primary) !important;
    white-space: nowrap !important;
  }
  
  /* Footer */
  .footer-inner {
    grid-template-columns: 1fr !important;
    gap: 20px !important;
  }
  
  /* 防止各页面内容溢出 */
  .filter-section,
  .filter-row,
  .filter-group,
  .filter-options,
  .category-tabs,
  .products-grid,
  .card,
  .product-card {
    max-width: 100% !important;
    box-sizing: border-box !important;
  }
  
  .filter-options {
    flex-wrap: wrap !important;
  }
  
  .filter-group {
    flex-wrap: wrap !important;
  }
  
  /* Typography */
  h1 { font-size: 2rem !important; }
  h2 { font-size: 1.5rem !important; }
  h3 { font-size: 1.25rem !important; }
  
  .section {
    padding: 40px 0 !important;
  }
}

/* ========================================
   Utility Classes
   ======================================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: var(--space-xs); }
.mt-2 { margin-top: var(--space-sm); }
.mt-3 { margin-top: var(--space-md); }
.mt-4 { margin-top: var(--space-lg); }

.mb-1 { margin-bottom: var(--space-xs); }
.mb-2 { margin-bottom: var(--space-sm); }
.mb-3 { margin-bottom: var(--space-md); }
.mb-4 { margin-bottom: var(--space-lg); }

.hidden { display: none !important; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}