/* 格斗大师 - 专业样式文件 */

/* 基础变量 */
:root {
    --primary: #E63946;
    --secondary: #1D3557;
    --whatsapp: #25D366;
    --background: #111827;
    --card-bg: #1F2937;
    --text-primary: #FFFFFF;
    --text-secondary: #9CA3AF;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* 工具类 */
.text-primary { color: var(--primary); }
.text-secondary { color: var(--text-secondary); }
.bg-primary { background-color: var(--primary); }
.bg-secondary { background-color: var(--secondary); }

/* 响应式布局 */
.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); }
.grid-cols-5 { grid-template-columns: repeat(5, 1fr); }

.gap-2 { gap: 0.5rem; }
.gap-4 { gap: 1rem; }
.gap-6 { gap: 1.5rem; }
.gap-8 { gap: 2rem; }

/* 宽度 */
.w-full { width: 100%; }
.w-4 { width: 1rem; }
.w-64 { width: 16rem; }
.max-w-md { max-width: 28rem; }
.max-w-3xl { max-width: 48rem; }
.max-w-4xl { max-width: 56rem; }

/* 行高 */
.leading-relaxed { line-height: 1.625; }

/* 高度 */
.h-full { height: 100%; }
.max-h-screen { max-height: 100vh; }

/* 溢出 */
.overflow-hidden { overflow: hidden; }
.overflow-y-auto { overflow-y: auto; }
.overflow-x-auto { overflow-x: auto; }

/* 空白字符 */
.whitespace-nowrap { white-space: nowrap; }

/* 转换效果 */
.transition-colors { transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out, border-color 0.15s ease-in-out; }
.transition-all { transition: all 0.15s ease-in-out; }
.transform { transform: translateX(0) translateY(0) rotate(0) skewX(0) skewY(0) scaleX(1) scaleY(1); }
.-translate-y-1\/2 { transform: translateY(-50%); }

/* 响应式工具类 */
@media (min-width: 768px) {
    .md\\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
    .md\\:text-6xl { font-size: 3.75rem; }
    .md\\:block { display: block; }
}

@media (min-width: 1024px) {
    .lg\\:grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
    .lg\\:grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
    .lg\\:col-span-2 { grid-column: span 2 / span 2; }
    .lg\\:flex { display: flex; }
    .lg\\:flex-row { flex-direction: row; }
    .lg\\:text-left { text-align: left; }
    .lg\\:space-y-0 > * + * { margin-top: 0; }
}

@media (min-width: 1280px) {
    .xl\\:grid-cols-5 { grid-template-columns: repeat(5, 1fr); }
}

/* Flex 方向 */
.flex-col { flex-direction: column; }

/* 焦点样式 */
.focus\\:outline-none:focus { outline: none; }
.focus\\:border-red-500:focus { border-color: var(--primary); }
.focus\\:ring-2:focus { box-shadow: 0 0 0 2px rgba(230, 57, 70, 0.5); }

/* 语言选择器下拉 */
.language-selector {
    position: relative;
    display: inline-block;
}

.language-current {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background-color: #374151;
    color: #D1D5DB;
    border: 1px solid #4B5563;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.875rem;
    min-width: 120px;
    justify-content: space-between;
}

.language-current:hover {
    background-color: #4B5563;
    border-color: #6B7280;
}

.language-current.active {
    background-color: var(--primary);
    border-color: var(--primary);
    color: white;
}

.language-current .flag {
    font-size: 1.125rem;
}

.language-current .arrow {
    transition: transform 0.2s ease;
    font-size: 0.75rem;
}

.language-current.open .arrow {
    transform: rotate(180deg);
}

.language-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background-color: #1F2937;
    border: 1px solid #374151;
    border-radius: 0.5rem;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
    z-index: 1000;
    min-width: 180px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.2s ease;
}

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

.language-option {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: #D1D5DB;
    cursor: pointer;
    transition: all 0.2s ease;
    border-bottom: 1px solid #374151;
    font-size: 0.875rem;
}

.language-option:last-child {
    border-bottom: none;
}

.language-option:hover {
    background-color: #374151;
    color: white;
}

.language-option.active {
    background-color: var(--primary);
    color: white;
}

.language-option .flag {
    font-size: 1.125rem;
}

.language-option .name {
    flex: 1;
}

.language-option .native {
    font-size: 0.75rem;
    color: #9CA3AF;
}

.language-option.active .native {
    color: rgba(255, 255, 255, 0.8);
}

/* 紧凑版语言选择器 (保留作为备用) */
.language-selector-compact {
  display: flex;
    gap: 0.5rem;
  flex-wrap: wrap;
}

.language-btn {
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
  cursor: pointer;
  transition: all 0.2s;
    background-color: #374151;
    color: #9CA3AF;
    border: 1px solid #4B5563;
}

.language-btn:hover {
    background-color: #4B5563;
    color: white;
}

.language-btn.active {
    background-color: var(--primary);
  color: white;
    border-color: var(--primary);
}

/* 卡片悬停效果 */
.card-hover {
    transition: transform 0.3s ease;
}

.card-hover:hover {
    transform: translateY(-5px);
}

/* 分类导航 */
.category-nav {
    position: relative;
    text-decoration: none;
    padding-bottom: 0.5rem;
    transition: all 0.3s ease;
}

.category-nav.active {
    color: white !important;
    border-bottom: 2px solid var(--primary) !important;
}

/* FAQ 手风琴样式 - 全新优化 */
.faq-item {
    transition: all 0.3s ease;
}

.faq-item:hover {
    transform: translateY(-2px);
}

.faq-header {
    cursor: pointer;
    transition: all 0.3s ease;
}

.faq-header:hover {
    background: rgba(55, 65, 81, 0.3) !important;
}

.faq-header:hover h4 {
    color: #F87171 !important;
}

.faq-header .fa-plus {
    transition: all 0.3s ease;
}

.faq-header:hover .fa-plus {
    transform: rotate(45deg);
    color: #EF4444 !important;
}

.faq-content {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: all 0.5s ease-in-out;
}

.faq-content.show {
    display: block !important;
    max-height: 500px;
    opacity: 1;
}

/* FAQ项目特定图标颜色 */
.faq-item:nth-child(1) .faq-header:hover .fa-plus {
    color: #EF4444 !important; /* 红色 */
}

.faq-item:nth-child(2) .faq-header:hover .fa-plus {
    color: #3B82F6 !important; /* 蓝色 */
}

.faq-item:nth-child(3) .faq-header:hover .fa-plus {
    color: #10B981 !important; /* 绿色 */
}

.faq-item:nth-child(4) .faq-header:hover .fa-plus {
    color: #8B5CF6 !important; /* 紫色 */
}

/* 动画 */
.smooth-transition {
  transition: all 0.3s ease;
}

.highlight-badge {
    animation: pulse 2s infinite;
}

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

.loading-spinner {
  animation: spin 1s linear infinite;
}

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

/* 课程卡片样式 - 全新设计 */
.course-card {
    background: linear-gradient(135deg, rgba(31, 41, 55, 0.9) 0%, rgba(17, 24, 39, 0.9) 100%);
    border-radius: 1rem;
    overflow: hidden;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(75, 85, 99, 0.3);
}

.course-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 
        0 25px 50px -12px rgba(0, 0, 0, 0.6),
        0 0 0 1px rgba(239, 68, 68, 0.2);
}

.course-card:hover::before {
    opacity: 1;
}

.course-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.05) 0%, rgba(239, 68, 68, 0.02) 100%);
    opacity: 0;
    transition: opacity 0.5s ease;
    pointer-events: none;
    z-index: 1;
}

/* 视频预览区域增强 */
.course-card .aspect-video {
    position: relative;
    overflow: hidden;
}

.course-card .aspect-video img {
    transition: transform 0.7s ease;
    will-change: transform;
}

.course-card:hover .aspect-video img {
    transform: scale(1.1);
}

/* 播放按钮动画 */
.course-card .group:hover .group-hover\:scale-110 {
    transform: scale(1.15);
    animation: pulse-play 2s infinite;
}

@keyframes pulse-play {
    0%, 100% { transform: scale(1.15); }
    50% { transform: scale(1.25); }
}

/* 标签样式增强 */
.course-card .bg-red-600\/90,
.course-card .bg-blue-600\/90,
.course-card .bg-green-500\/90,
.course-card .bg-orange-500\/90 {
    backdrop-filter: blur(8px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

/* 信息区域 */
.course-card .p-4 {
    position: relative;
    z-index: 2;
}

/* 标题悬停效果 */
.course-card .group:hover .group-hover\:text-red-400 {
    color: #F87171;
    text-shadow: 0 0 8px rgba(248, 113, 113, 0.3);
}

/* 按钮增强效果 */
.course-card button {
    position: relative;
    overflow: hidden;
}

.course-card button::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.2) 0%, transparent 70%);
    transition: all 0.5s ease;
    transform: translate(-50%, -50%);
}

.course-card button:hover::before {
    width: 300px;
    height: 300px;
}

/* 星级评分样式 */
.course-card .fa-star,
.course-card .fa-star-half-o,
.course-card .fa-star-o {
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
    transition: all 0.2s ease;
}

.course-card:hover .fa-star {
    transform: scale(1.1);
    filter: brightness(1.2);
}

/* 响应式优化 */
@media (max-width: 640px) {
    .course-card {
        margin-bottom: 1rem;
    }
    
    .course-card:hover {
        transform: translateY(-4px) scale(1.01);
    }
    
    .course-card .p-4 {
        padding: 0.75rem;
    }
    
    .course-card .space-y-3 {
        gap: 0.5rem;
    }
    
    .course-card .text-sm {
        font-size: 0.75rem;
    }
    
    .course-card .text-xs {
        font-size: 0.625rem;
    }
}

@media (min-width: 641px) and (max-width: 768px) {
    .course-card .aspect-video {
        aspect-ratio: 16 / 10;
    }
}

@media (min-width: 1024px) {
    .course-card:hover {
        transform: translateY(-12px) scale(1.03);
    }
}

/* 加载状态样式 */
.course-card.loading {
    opacity: 0.7;
    pointer-events: none;
}

.course-card.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 24px;
    height: 24px;
    border: 2px solid #374151;
    border-top-color: #EF4444;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    transform: translate(-50%, -50%);
    z-index: 10;
}

.course-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: white;
    line-height: 1.4;
    margin-bottom: 0.25rem;
  display: -webkit-box;
    -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
}

.course-instructor {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.course-info {
    padding: 0.75rem;
    background-color: rgba(0, 0, 0, 0.3);
}

/* 视频容器 */
.video-container {
    position: relative;
    width: 100%;
    aspect-ratio: 16/9;
    background-color: #000;
  border-radius: 0.5rem;
    overflow: hidden;
}

/* 响应式 */
@media (max-width: 640px) {
    .grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
    
    .container {
        padding: 0 1rem;
    }
    
    .course-title {
        font-size: 0.75rem;
        line-height: 1.2;
        margin-bottom: 0.25rem;
    }
    
    .course-instructor {
        font-size: 0.625rem;
    }
    
    .gap-4 {
        gap: 0.5rem;
    }
    
    .p-4 {
        padding: 0.5rem;
    }
}

@media (min-width: 640px) {
    .course-title {
        font-size: 0.875rem;
    }
    
    .course-instructor {
        font-size: 0.75rem;
    }
}

@media (min-width: 768px) {
    .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-4 { grid-template-columns: repeat(4, 1fr); }
    .lg\\:grid-cols-5 { grid-template-columns: repeat(5, 1fr); }
}

@media (min-width: 1280px) {
    .xl\\:grid-cols-5 { grid-template-columns: repeat(5, 1fr); }
    .xl\\:grid-cols-6 { grid-template-columns: repeat(6, 1fr); }
}

/* 模态框样式 */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
  align-items: center;
  justify-content: center;
    z-index: 1000;
}

.modal.hidden {
    display: none;
}

.modal-content {
    background-color: white;
  border-radius: 0.5rem;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    max-width: 90vw;
    max-height: 90vh;
    overflow-y: auto;
}

/* 按钮样式 */
.btn {
    padding: 0.5rem 1rem;
    border-radius: 0.375rem;
  font-weight: 500;
    text-align: center;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

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

.btn-primary:hover {
    background-color: #dc2626;
}

.btn-secondary {
    background-color: #6B7280;
    color: white;
}

.btn-secondary:hover {
    background-color: #4B5563;
}

/* 工具类 */
.flex { display: flex; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.space-x-2 > * + * { margin-left: 0.5rem; }
.space-x-4 > * + * { margin-left: 1rem; }
.space-x-6 > * + * { margin-left: 1.5rem; }
.space-x-8 > * + * { margin-left: 2rem; }
.space-y-2 > * + * { margin-top: 0.5rem; }
.space-y-4 > * + * { margin-top: 1rem; }
.space-y-6 > * + * { margin-top: 1.5rem; }
.mx-auto { margin-left: auto; margin-right: auto; }
.min-h-screen { min-height: 100vh; }
.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mb-8 { margin-bottom: 2rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 0.75rem; }
.mt-4 { margin-top: 1rem; }
.mt-8 { margin-top: 2rem; }
.mt-20 { margin-top: 5rem; }
.mr-1 { margin-right: 0.25rem; }
.mr-2 { margin-right: 0.5rem; }
.ml-2 { margin-left: 0.5rem; }
.ml-8 { margin-left: 2rem; }
.p-3 { padding: 0.75rem; }
.p-4 { padding: 1rem; }
.p-6 { padding: 1.5rem; }
.p-8 { padding: 2rem; }
.px-2 { padding-left: 0.5rem; padding-right: 0.5rem; }
.px-4 { padding-left: 1rem; padding-right: 1rem; }
.px-6 { padding-left: 1.5rem; padding-right: 1.5rem; }
.py-1 { padding-top: 0.25rem; padding-bottom: 0.25rem; }
.py-2 { padding-top: 0.5rem; padding-bottom: 0.5rem; }
.py-4 { padding-top: 1rem; padding-bottom: 1rem; }
.py-12 { padding-top: 3rem; padding-bottom: 3rem; }
.py-20 { padding-top: 5rem; padding-bottom: 5rem; }
.py-16 { padding-top: 4rem; padding-bottom: 4rem; }
.py-8 { padding-top: 2rem; padding-bottom: 2rem; }
.px-8 { padding-left: 2rem; padding-right: 2rem; }
.py-3 { padding-top: 0.75rem; padding-bottom: 0.75rem; }
.pt-3 { padding-top: 0.75rem; }
.pl-10 { padding-left: 2.5rem; }
.block { display: block; }
.rounded { border-radius: 0.25rem; }
.rounded-lg { border-radius: 0.5rem; }
.rounded-full { border-radius: 9999px; }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }
.text-2xl { font-size: 1.5rem; }
.text-4xl { font-size: 2.25rem; }
.text-6xl { font-size: 3.75rem; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }
.text-center { text-align: center; }
.leading-tight { line-height: 1.25; }
.hidden { display: none !important; }

/* 文字颜色 */
.text-white { color: #ffffff; }
.text-black { color: #000000; }
.text-gray-300 { color: #D1D5DB; }
.text-gray-400 { color: #9CA3AF; }
.text-gray-500 { color: #6B7280; }
.text-gray-700 { color: #374151; }
.text-red-500 { color: var(--primary); }
.text-red-400 { color: #F87171; }
.text-green-400 { color: #4ADE80; }
.text-green-100 { color: #DCFCE7; }
.text-yellow-400 { color: #FACC15; }
.text-blue-400 { color: #60A5FA; }
.text-purple-400 { color: #C084FC; }

/* Hover 效果 */
.hover\\:text-white:hover { color: #ffffff; }
.hover\\:text-red-400:hover { color: #F87171; }
.hover\\:bg-red-700:hover { background-color: #B91C1C; }
.hover\\:bg-green-600:hover { background-color: #059669; }
.hover\\:bg-green-700:hover { background-color: #047857; }
.hover\\:bg-gray-600:hover { background-color: #4B5563; }
.hover\\:bg-gray-700:hover { background-color: #374151; }
.hover\\:bg-gray-100:hover { background-color: #F3F4F6; }
.hover\\:scale-105:hover { transform: scale(1.05); }

/* Group hover 效果 */
.group:hover .group-hover\\:text-red-400 { color: #F87171; }

/* 可见性切换 */
.opacity-0 { opacity: 0; }
.opacity-100 { opacity: 1; }
.group:hover .group-hover\\:opacity-100 { opacity: 1; }
.group:hover .group-hover\\:opacity-0 { opacity: 0; }

/* 位置 */
.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.inset-0 { top: 0; right: 0; bottom: 0; left: 0; }
.top-2 { top: 0.5rem; }
.right-2 { right: 0.5rem; }
.bottom-2 { bottom: 0.5rem; }
.left-2 { left: 0.5rem; }

/* Z-index */
.z-10 { z-index: 10; }
.z-50 { z-index: 50; }

/* 边框 */
.border { border: 1px solid; }
.border-t { border-top: 1px solid; }
.border-gray-300 { border-color: #D1D5DB; }
.border-gray-700 { border-color: #374151; }
.border-red-500 { border-color: var(--primary); }
.border-b { border-bottom: 1px solid; }
.border-b-2 { border-bottom: 2px solid; }

/* 阴影 */
.shadow-md { box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06); }
.shadow-lg { box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05); }

/* 背景 */
.bg-black { background-color: #000000; }
.bg-white { background-color: #ffffff; }
.bg-gray-900 { background-color: #111827; }
.bg-gray-800 { background-color: #1F2937; }
.bg-gray-700 { background-color: #374151; }
.bg-gray-600 { background-color: #4B5563; }
.bg-red-600 { background-color: #DC2626; }
.bg-red-700 { background-color: #B91C1C; }
.bg-green-500 { background-color: #10B981; }
.bg-green-600 { background-color: #059669; }
.bg-green-700 { background-color: #047857; }
.bg-yellow-500 { background-color: #EAB308; }

/* 渐变背景 */
.bg-gradient-to-r { background-image: linear-gradient(to right, var(--tw-gradient-stops)); }
.bg-gradient-to-b { background-image: linear-gradient(to bottom, var(--tw-gradient-stops)); }
.from-gray-900 { --tw-gradient-from: #111827; --tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to, rgba(17, 24, 39, 0)); }
.from-gray-800 { --tw-gradient-from: #1F2937; --tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to, rgba(31, 41, 55, 0)); }
.via-red-900 { --tw-gradient-stops: var(--tw-gradient-from), #7F1D1D, var(--tw-gradient-to, rgba(127, 29, 29, 0)); }
.to-gray-900 { --tw-gradient-to: #111827; }

/* 透明度 */
.bg-opacity-50 { --tw-bg-opacity: 0.5; }
.bg-opacity-60 { --tw-bg-opacity: 0.6; }
.bg-opacity-80 { --tw-bg-opacity: 0.8; }
.bg-opacity-90 { --tw-bg-opacity: 0.9; }

/* 背景透明度具体实现 */
.bg-black.bg-opacity-60 { background-color: rgba(0, 0, 0, 0.6); }
.bg-black.bg-opacity-80 { background-color: rgba(0, 0, 0, 0.8); }

/* 文本颜色 */
.text-white { color: #ffffff; }
.text-black { color: #000000; }
.text-gray-400 { color: #9CA3AF; }
.text-gray-300 { color: #D1D5DB; }
.text-gray-500 { color: #6B7280; }
.text-red-500 { color: #EF4444; }
.text-green-400 { color: #34D399; }
.text-yellow-400 { color: #FBBF24; }

/* 悬停效果 */
.hover\\:text-white:hover { color: #ffffff; }
.hover\\:text-red-400:hover { color: #F87171; }
.hover\\:bg-red-700:hover { background-color: #B91C1C; }
.hover\\:bg-gray-600:hover { background-color: #4B5563; }
.hover\\:bg-green-700:hover { background-color: #047857; }
.hover\\:scale-105:hover { transform: scale(1.05); }
.hover\\:shadow-xl:hover { box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.3); }

/* Focus效果 */
.focus\\:outline-none:focus { outline: none; }
.focus\\:border-red-500:focus { border-color: var(--primary); }

/* 宽度 */
.w-full { width: 100%; }
.w-64 { width: 16rem; }
.max-w-md { max-width: 28rem; }
.max-w-4xl { max-width: 56rem; }
.max-w-3xl { max-width: 48rem; }

/* 高度 */
.h-full { height: 100%; }
.min-h-screen { min-height: 100vh; }

/* 溢出 */
.overflow-hidden { overflow: hidden; }
.overflow-x-auto { overflow-x: auto; }
.overflow-y-auto { overflow-y: auto; }

/* 空白处理 */
.whitespace-nowrap { white-space: nowrap; }

/* 行高限制 */
.line-clamp-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* 过渡效果 */
.transition-colors { transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out; }
.transition-all { transition: all 0.15s ease-in-out; }
.transition-transform { transition: transform 0.15s ease-in-out; }
.transition-opacity { transition: opacity 0.15s ease-in-out; }
.duration-300 { transition-duration: 300ms; }

/* 变换 */
.transform { transform: translateZ(0); }
.-translate-y-1\\/2 { transform: translateY(-50%); }
.scale-105 { transform: scale(1.05); }
.scale-110 { transform: scale(1.1); }

/* 阴影 */
.shadow-md { box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1); }
.shadow-xl { box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1); }

/* 背景渐变 */
.bg-gradient-to-r { background-image: linear-gradient(to right, var(--tw-gradient-stops)); }
.from-gray-900 { --tw-gradient-from: #111827; --tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to, rgba(17, 24, 39, 0)); }
.via-red-900 { --tw-gradient-stops: var(--tw-gradient-from), #7F1D1D, var(--tw-gradient-to, rgba(127, 29, 29, 0)); }
.to-gray-900 { --tw-gradient-to: #111827; }

/* 长宽比 */
.aspect-video { aspect-ratio: 16 / 9; }

/* 对象适配 */
.object-cover { object-fit: cover; }

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

/* 分组悬停 */
.group { position: relative; }