/* 
 * 茶叶百科导航系统 - 原生CSS样式
 * 替代Tailwind CSS框架
 * 保持所有原有功能和布局
 */

/* ==================== CSS变量定义 ==================== */
:root {
    /* 主色调 - 茶绿色 */
    --primary: #2E7D32;
    --primary-hover: #256828;
    --primary-light: #4CAF50;
    
    /* 辅助色 */
    --secondary: #8D6E63;
    --secondary-light: #A1887F;
    
    /* 强调色 */
    --accent: #FFCC80;
    
    /* 茶类专用颜色 */
    --tea-green: #2E7D32;
    --tea-black: #5D4037;
    --tea-dark: #424242;
    --tea-white: #E0F7FA;
    --tea-oolong: #FFB74D;
    --tea-yellow: #FFEB3B;
    --tea-pu: #8D6E63;
    --tea-reprocessed: #7986CB;
    --tea-herbal: #81C784;
    
    /* 中性色 */
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;
    
    /* 状态色 */
    --red-500: #EF4444;
    --red-600: #DC2626;
    --purple-500: #8B5CF6;
    --purple-600: #7C3AED;
    
    /* 间距 */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    --spacing-12: 3rem;
    
    /* 圆角 */
    --rounded-sm: 0.125rem;
    --rounded: 0.25rem;
    --rounded-md: 0.375rem;
    --rounded-lg: 0.5rem;
    --rounded-xl: 0.75rem;
    --rounded-2xl: 1rem;
    --rounded-full: 9999px;
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --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);
    
    /* 字体 */
    --font-sans: Inter, system-ui, -apple-system, sans-serif;
    
    /* 过渡 */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
}

/* ==================== 全局样式 ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--gray-50);
    color: var(--gray-800);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ==================== 布局类 ==================== */
.container {
    width: 100%;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--spacing-4);
    padding-right: var(--spacing-4);
}

.container-md {
    max-width: 768px;
}

.container-sm {
    max-width: 640px;
}

/* ==================== 弹性布局 ==================== */
.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.flex-row {
    flex-direction: row;
}

.flex-wrap {
    flex-wrap: wrap;
}

.items-center {
    align-items: center;
}

.items-start {
    align-items: flex-start;
}

.items-end {
    align-items: flex-end;
}

.justify-center {
    justify-content: center;
}

.justify-between {
    justify-content: space-between;
}

.justify-end {
    justify-content: flex-end;
}

.justify-start {
    justify-content: flex-start;
}

.gap-1 { gap: var(--spacing-1); }
.gap-2 { gap: var(--spacing-2); }
.gap-3 { gap: var(--spacing-3); }
.gap-4 { gap: var(--spacing-4); }
.gap-6 { gap: var(--spacing-6); }

/* ==================== 网格布局 ==================== */
.grid {
    display: grid;
}

.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); }

.gap-6 { gap: var(--spacing-6); }

/* ==================== 定位 ==================== */
.relative {
    position: relative;
}

.absolute {
    position: absolute;
}

.fixed {
    position: fixed;
}

.sticky {
    position: sticky;
}

.top-0 { top: 0; }
.top-1\/2 { top: 50%; }
.bottom-0 { bottom: 0; }
.bottom-20 { bottom: 5rem; }
.left-0 { left: 0; }
.left-4 { left: 1rem; }
.left-20 { left: 5rem; }
.right-0 { right: 0; }
.right-4 { right: 1rem; }
.right-5 { right: 1.25rem; }

/* ==================== 尺寸 ==================== */
.w-full { width: 100%; }
.w-10 { width: 2.5rem; }
.w-12 { width: 3rem; }
.w-32 { width: 8rem; }
.w-40 { width: 10rem; }
.w-h-32 { width: 8rem; height: 8rem; }

.h-full { height: 100%; }
.h-10 { height: 2.5rem; }
.h-12 { height: 3rem; }
.h-32 { height: 8rem; }
.h-40 { height: 10rem; }
.h-64 { height: 16rem; }
.h-80 { height: 20rem; }

.min-h-50px { min-height: 50px; }

/* ==================== 间距 ==================== */
.m-0 { margin: 0; }
.mt-1 { margin-top: var(--spacing-1); }
.mt-2 { margin-top: var(--spacing-2); }
.mt-4 { margin-top: var(--spacing-4); }
.mt-6 { margin-top: var(--spacing-6); }
.mb-1 { margin-bottom: var(--spacing-1); }
.mb-2 { margin-bottom: var(--spacing-2); }
.mb-4 { margin-bottom: var(--spacing-4); }
.mb-6 { margin-bottom: var(--spacing-6); }
.mb-16 { margin-bottom: 4rem; }
.mr-1 { margin-right: var(--spacing-1); }
.mr-2 { margin-right: var(--spacing-2); }
.mr-4 { margin-right: var(--spacing-4); }
.ml-auto { margin-left: auto; }
.mx-auto { margin-left: auto; margin-right: auto; }
.my-auto { margin-top: auto; margin-bottom: auto; }

.p-2 { padding: var(--spacing-2); }
.p-3 { padding: var(--spacing-3); }
.p-4 { padding: var(--spacing-4); }
.p-6 { padding: var(--spacing-6); }
.p-8 { padding: var(--spacing-8); }
.p-10 { padding: var(--spacing-10); }

.px-2 { padding-left: var(--spacing-2); padding-right: var(--spacing-2); }
.px-3 { padding-left: var(--spacing-3); padding-right: var(--spacing-3); }
.px-4 { padding-left: var(--spacing-4); padding-right: var(--spacing-4); }
.px-6 { padding-left: var(--spacing-6); padding-right: var(--spacing-6); }

.py-1 { padding-top: var(--spacing-1); padding-bottom: var(--spacing-1); }
.py-2 { padding-top: var(--spacing-2); padding-bottom: var(--spacing-2); }
.py-3 { padding-top: var(--spacing-3); padding-bottom: var(--spacing-3); }
.py-6 { padding-top: var(--spacing-6); padding-bottom: var(--spacing-6); }
.py-8 { padding-top: var(--spacing-8); padding-bottom: var(--spacing-8); }
.py-10 { padding-top: var(--spacing-10); padding-bottom: var(--spacing-10); }

/* ==================== 文字样式 ==================== */
.text-xs { font-size: 0.75rem; line-height: 1rem; }
.text-sm { font-size: 0.875rem; line-height: 1.25rem; }
.text-base { font-size: 1rem; line-height: 1.5rem; }
.text-lg { font-size: 1.125rem; line-height: 1.75rem; }
.text-xl { font-size: 1.25rem; line-height: 1.75rem; }
.text-2xl { font-size: 1.5rem; line-height: 2rem; }
.text-3xl { font-size: 1.875rem; line-height: 2.25rem; }
.text-4xl { font-size: 2.25rem; line-height: 2.5rem; }

.font-normal { font-weight: 400; }
.font-medium { font-weight: 500; }
.font-bold { font-weight: 700; }

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

.text-primary { color: var(--primary); }
.text-gray-400 { color: var(--gray-400); }
.text-gray-500 { color: var(--gray-500); }
.text-gray-600 { color: var(--gray-600); }
.text-gray-700 { color: var(--gray-700); }
.text-gray-800 { color: var(--gray-800); }
.text-white { color: white; }
.text-red-500 { color: var(--red-500); }

/* ==================== 背景色 ==================== */
.bg-white { background-color: white; }
.bg-gray-50 { background-color: var(--gray-50); }
.bg-gray-100 { background-color: var(--gray-100); }
.bg-gray-200 { background-color: var(--gray-200); }
.bg-gray-300 { background-color: var(--gray-300); }
.bg-gray-700 { background-color: var(--gray-700); }
.bg-gray-800 { background-color: var(--gray-800); }
.bg-primary { background-color: var(--primary); }
.bg-primary\/80 { background-color: rgba(46, 125, 50, 0.8); }
.bg-primary\/90 { background-color: rgba(46, 125, 50, 0.9); }
.bg-secondary { background-color: var(--secondary); }
.bg-secondary\/80 { background-color: rgba(141, 110, 99, 0.8); }
.bg-green-500 { background-color: var(--primary-light); }
.bg-green-600 { background-color: #43A047; }
.bg-red-500 { background-color: var(--red-500); }
.bg-red-600 { background-color: var(--red-600); }
.bg-purple-500 { background-color: var(--purple-500); }
.bg-purple-600 { background-color: var(--purple-600); }

/* ==================== 边框 ==================== */
.border { border: 1px solid var(--gray-300); }
.border-2 { border-width: 2px; }
.border-4 { border-width: 4px; }
.border-dashed { border-style: dashed; }
.border-none { border: none; }
.border-t { border-top: 1px solid var(--gray-200); }
.border-gray-100 { border-color: var(--gray-100); }
.border-gray-200 { border-color: var(--gray-200); }
.border-gray-300 { border-color: var(--gray-300); }
.border-green-100 { border-color: #C8E6C9; }
.border-red-100 { border-color: #FFCDD2; }
.border-yellow-100 { border-color: #FFF9C4; }
.border-yellow-200 { border-color: #FFF59D; }
.border-amber-200 { border-color: #FFE0B2; }
.border-indigo-100 { border-color: #C5CAE9; }
.border-brown-600 { border-color: #5D4037; }

/* ==================== 圆角 ==================== */
.rounded { border-radius: var(--rounded); }
.rounded-sm { border-radius: var(--rounded-sm); }
.rounded-md { border-radius: var(--rounded-md); }
.rounded-lg { border-radius: var(--rounded-lg); }
.rounded-xl { border-radius: var(--rounded-xl); }
.rounded-2xl { border-radius: var(--rounded-2xl); }
.rounded-full { border-radius: var(--rounded-full); }

/* ==================== 阴影 ==================== */
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow { box-shadow: var(--shadow); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }

/* ==================== 透明度与可见性 ==================== */
.opacity-0 { opacity: 0; }
.opacity-100 { opacity: 1; }
.invisible { visibility: hidden; }
.visible { visibility: visible; }
.hidden { display: none; }
.block { display: block; }
.inline-block { display: inline-block; }
.inline { display: inline; }

/* ==================== 变换 ==================== */
.transform { transform: translateZ(0); }
.-translate-y-1\/2 { transform: translateY(-50%); }
.translate-y-1\/2 { transform: translateY(50%); }

/* ==================== 过渡 ==================== */
.transition { transition: all var(--transition-base); }
.transition-all { transition: all var(--transition-base); }
.transition-colors { transition: color var(--transition-base), background-color var(--transition-base); }
.transition-transform { transition: transform var(--transition-base); }
.duration-150 { transition-duration: 150ms; }
.duration-200 { transition-duration: 200ms; }
.duration-300 { transition-duration: 300ms; }
.ease { transition-timing-function: ease; }
.ease-in { transition-timing-function: ease-in; }
.ease-out { transition-timing-function: ease-out; }

/* ==================== 滚动条 ==================== */
.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }
.overflow-y-auto { overflow-y: auto; }
.overflow-x-auto { overflow-x: auto; }

.max-h-96 { max-height: 24rem; }
.object-contain { object-fit: contain; }
.object-cover { object-fit: cover; }

/* ==================== 光标 ==================== */
.cursor-pointer { cursor: pointer; }
.cursor-default { cursor: default; }

/* ==================== Z-index ==================== */
.z-10 { z-index: 10; }
.z-20 { z-index: 20; }
.z-40 { z-index: 40; }
.z-50 { z-index: 50; }
.z-99 { z-index: 99; }
.z-100 { z-index: 100; }
.z-998 { z-index: 998; }
.z-999 { z-index: 999; }
.z-1000 { z-index: 1000; }

/* ==================== 特殊功能类 ==================== */
.scroll-mt-20 { scroll-margin-top: 5rem; }
.w-32 { width: 8rem; }
.h-32 { height: 8rem; }
.space-x-4 > * + * { margin-left: var(--spacing-4); }
.space-y-2 > * + * { margin-top: var(--spacing-2); }
.space-y-4 > * + * { margin-top: var(--spacing-4); }
.mb-4 { margin-bottom: var(--spacing-4); }
.mr-4 { margin-right: var(--spacing-4); }

.outline-none { outline: none; }
.outline { outline: 2px solid var(--primary); }
.bg-white\/80 { background-color: rgba(255, 255, 255, 0.8); }

/* ==================== 响应式断点 ==================== */
@media (min-width: 640px) {
    .sm\:grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
    .sm\:block { display: block; }
    .sm\:hidden { display: none; }
}

@media (min-width: 768px) {
    .md\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
    .md\:grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
    .md\:flex-row { flex-direction: row; }
    .md\:flex-col { flex-direction: column; }
    .md\:hidden { display: none; }
    .md\:block { display: block; }
    .md\:w-1\/2 { width: 50%; }
    .md\:w-1\/3 { width: 33.333333%; }
    .md\:w-2\/3 { width: 66.666667%; }
    .md\:w-full { width: 100%; }
    .md\:mb-0 { margin-bottom: 0; }
}

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

/* ==================== 特殊组件样式 ==================== */

/* 导航链接下划线动画 */
.nav-link {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.5rem 0.75rem;
    border-radius: 9999px;
    transition: all var(--transition-slow);
}

.nav-link:hover {
    background-color: #F0FDF4;
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -4px;
    left: 0;
    background: var(--accent);
    transition: width var(--transition-slow) ease;
}

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

/* 搜索容器 */
.search-container {
    position: relative;
    max-width: 600px;
    margin: 0 auto 2rem;
}

.search-input {
    width: 100%;
    padding: 12px 20px 12px 45px;
    border-radius: 30px;
    border: 2px solid var(--gray-200);
    font-size: 16px;
    transition: all var(--transition-base);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(46, 125, 50, 0.2);
}

.search-icon {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-500);
}

/* 筛选芯片 */
.filter-chip {
    padding: 0.5rem 1rem;
    border-radius: 9999px;
    background-color: var(--gray-200);
    color: var(--gray-700);
    cursor: pointer;
    transition: all var(--transition-base);
    font-size: 0.875rem;
}

.filter-chip:hover {
    background-color: var(--gray-300);
}

.filter-chip.active {
    background-color: var(--primary);
    color: white;
}

/* 卡片样式 */
.tea-card {
    background: white;
    border-radius: var(--rounded-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: transform var(--transition-slow), box-shadow var(--transition-slow);
    position: relative;
}

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

.card-shadow {
    box-shadow: var(--shadow-lg);
}

.card-hover {
    transition: transform var(--transition-slow), box-shadow var(--transition-slow);
}

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

/* 卡片图片 */
.card-image {
    transition: transform 0.5s ease;
}

.card-hover:hover .card-image {
    animation: spin 8s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* 编辑按钮 */
.edit-btn {
    position: absolute;
    top: 5px;
    right: 5px;
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid var(--gray-200);
    border-radius: 4px;
    padding: 2px 5px;
    font-size: 12px;
    cursor: pointer;
    display: none;
    z-index: 10;
    transition: all var(--transition-base);
    will-change: transform, opacity;
}

.edit-btn:hover {
    background: var(--primary);
    color: white;
    transform: scale(1.05);
}

.image-edit-btn,
.category-edit-btn,
.hero-edit-btn,
.text-edit-btn,
.container-edit-btn {
    position: absolute;
    top: 5px;
    right: 5px;
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid var(--gray-200);
    border-radius: 4px;
    padding: 2px 5px;
    font-size: 12px;
    cursor: pointer;
    display: none;
    z-index: 10;
    transition: all var(--transition-base);
}

.card-edit-btn {
    position: absolute;
    top: 3px;
    right: 3px;
    background: white;
    border: none;
    border-radius: 50%;
    width: 30px;
    height: 30px;
    display: none;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 10;
}

.edit-mode .card-edit-btn,
.edit-mode .add-card-btn {
    display: flex;
}

.edit-mode .tea-card {
    cursor: pointer;
    position: relative;
}

.edit-mode .tea-card:hover {
    box-shadow: 0 0 0 2px var(--primary);
}

/* 添加卡片按钮 */
.add-card-btn {
    border: 2px dashed var(--gray-300);
    border-radius: 12px;
    color: var(--gray-600);
    cursor: pointer;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
}

.add-card-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

/* 分类图标 */
.category-icon {
    transition: transform var(--transition-slow);
}

.category-header:hover .category-icon {
    transform: rotate(15deg) scale(1.1);
}

/* 管理员入口 */
.admin-entry {
    position: fixed;
    bottom: 20px;
    left: 20px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(46, 125, 50, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 998;
    box-shadow: var(--shadow-md);
    transition: background-color var(--transition-base);
}

.admin-entry:hover {
    background-color: var(--primary);
}

/* 管理员菜单 */
.admin-menu {
    position: fixed;
    bottom: 70px;
    left: 20px;
    background: white;
    border-radius: 8px;
    box-shadow: var(--shadow-md);
    padding: 10px;
    z-index: 999;
    display: none;
    min-width: 150px;
}

.admin-menu.visible {
    display: block;
}

.admin-menu-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem;
    border-radius: var(--rounded);
    cursor: pointer;
    transition: background-color var(--transition-base);
}

.admin-menu-item:hover {
    background-color: var(--gray-100);
}

/* 模态框 */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-slow);
}

.modal-backdrop.visible {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: white;
    border-radius: 8px;
    padding: 24px;
    width: 90%;
    max-width: 500px;
    transform: translateY(-20px);
    transition: transform var(--transition-slow);
}

.modal-backdrop.visible .modal {
    transform: translateY(0);
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid var(--gray-300);
    border-radius: var(--rounded);
    font-size: 1rem;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(46, 125, 50, 0.2);
}

/* 图片预览 */
.image-preview {
    width: 100px;
    height: 100px;
    object-fit: cover;
    border-radius: 8px;
    margin-top: 8px;
    display: none;
}

.image-preview.visible {
    display: block;
}

/* 文件上传包装器 */
.file-input-wrapper {
    position: relative;
    overflow: hidden;
    display: inline-block;
}

.file-input-wrapper input[type="file"] {
    position: absolute;
    left: 0;
    top: 0;
    opacity: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
}

/* 搜索结果高亮 */
.highlight {
    background-color: var(--tea-yellow);
    padding: 0 2px;
    border-radius: 2px;
}

.search-result-item {
    padding: 8px 16px;
    cursor: pointer;
    transition: background-color var(--transition-base);
}

.search-result-item:hover {
    background-color: var(--gray-100);
}

.search-result-category {
    font-size: 12px;
    color: var(--gray-600);
    margin-top: 2px;
}

/* 卡片高亮动画 */
@keyframes highlight-card {
    0% { box-shadow: 0 0 0 0 rgba(255, 235, 59, 0.7); }
    70% { box-shadow: 0 0 0 10px rgba(255, 235, 59, 0); }
    100% { box-shadow: 0 0 0 0 rgba(255, 235, 59, 0); }
}

.highlight-animation {
    animation: highlight-card 1.5s ease-out;
}

/* 骨架屏动画 */
@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.card-skeleton {
    animation: skeleton-loading 1.5s ease-in-out infinite;
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    border-radius: 8px;
}

/* 淡入缩放动画 */
@keyframes fade-scale {
    0% { opacity: 0; transform: scale(0.9); }
    100% { opacity: 1; transform: scale(1); }
}

.feedback-animation {
    animation: fade-scale 0.3s ease-out;
}

/* 返回顶部按钮 */
#back-to-top {
    position: fixed;
    bottom: 5rem;
    right: 1.25rem;
    width: 3rem;
    height: 3rem;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-slow);
    cursor: pointer;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

#back-to-top:hover {
    background-color: var(--primary-hover);
}

/* 移动端优化 */
@media (max-width: 768px) {
    .edit-btn {
        padding: 8px 12px;
        min-width: 44px;
        min-height: 44px;
    }
    
    .edit-mode .category-wrapper,
    .edit-mode .hero-wrapper,
    .edit-mode .container-wrapper {
        outline-offset: -2px;
        animation: pulse-border 2s infinite;
    }
    
    @keyframes pulse-border {
        0% { outline-color: var(--primary); }
        50% { outline-color: rgba(46, 125, 50, 0.5); }
        100% { outline-color: var(--primary); }
    }
    
    .drag-placeholder {
        background: rgba(46, 125, 50, 0.1);
        border: 2px dashed var(--primary);
        border-radius: 8px;
    }
}

/* 轮播区域 */
.hero-section {
    position: relative;
    height: 16rem;
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 2.5rem;
}

.hero-section img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to right, rgba(46, 125, 50, 0.8), rgba(141, 110, 99, 0.8));
    z-index: 10;
}

.hero-content {
    position: relative;
    z-index: 20;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 1rem;
    color: white;
}

@media (min-width: 768px) {
    .hero-section {
        height: 20rem;
    }
}

/* 隐藏滚动条但保留功能 */
.hide-scrollbar {
    -ms-overflow-style: none;
    scrollbar-width: none;
}

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

/* 分类区域 */
.category-section {
    margin-bottom: 4rem;
    scroll-margin-top: 5rem;
}

.category-wrapper {
    position: relative;
}

.edit-mode .category-wrapper {
    outline: 2px dashed var(--primary);
    padding: 8px;
}

/* 茶类颜色 */
.text-tea-green { color: var(--tea-green); }
.text-tea-black { color: var(--tea-black); }
.text-tea-dark { color: var(--tea-dark); }
.text-tea-white { color: var(--tea-white); }
.text-tea-oolong { color: var(--tea-oolong); }
.text-tea-yellow { color: var(--tea-yellow); }
.text-tea-pu { color: var(--tea-pu); }
.text-tea-reprocessed { color: var(--tea-reprocessed); }
.text-tea-herbal { color: var(--tea-herbal); }

.bg-tea-green { background-color: var(--tea-green); }
.bg-tea-black { background-color: var(--tea-black); }
.bg-tea-dark { background-color: var(--tea-dark); }
.bg-tea-white { background-color: var(--tea-white); }
.bg-tea-oolong { background-color: var(--tea-oolong); }
.bg-tea-yellow { background-color: var(--tea-yellow); }
.bg-tea-pu { background-color: var(--tea-pu); }
.bg-tea-reprocessed { background-color: var(--tea-reprocessed); }
.bg-tea-herbal { background-color: var(--tea-herbal); }

/* 响应式网格 */
@media (max-width: 640px) {
    .tea-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 641px) and (max-width: 767px) {
    .tea-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 768px) and (max-width: 1023px) {
    .tea-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 1024px) {
    .tea-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}