/**
 * 2025 现代玻璃态风格 - 主样式文件
 * Glassmorphism Design System v2.0
 * SEO优化 + 移动端增强 + 流畅微动画
 */

/* ========== CSS变量 - 渐变色彩系统 ========== */
:root {
    /* 主色调渐变 */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --accent-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --success-gradient: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
    
    /* 玻璃态背景 */
    --glass-bg: rgba(255, 255, 255, 0.08);
    --glass-bg-hover: rgba(255, 255, 255, 0.12);
    --glass-border: rgba(255, 255, 255, 0.18);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    
    /* 文字颜色 */
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.5);
    
    /* 背景 */
    --bg-dark: #0f0f1a;
    --bg-darker: #080810;
    
    /* 间距 */
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 20px;
    --spacing-lg: 30px;
    --spacing-xl: 40px;
    
    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 9999px;
    
    /* 动画 */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========== 全局样式 ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    font-size: 16px;
    line-height: 1.6;
    overflow-x: hidden;
}

/* 背景渐变装饰 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 50%, rgba(120, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 119, 198, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(76, 175, 80, 0.1) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

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

.container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ========== 头部 - 玻璃态导航 ========== */
.header {
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--glass-border);
    padding: var(--spacing-sm) 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all var(--transition-normal);
}

.header.scrolled {
    background: rgba(15, 15, 26, 0.95);
    box-shadow: var(--glass-shadow);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
}

.logo {
    font-size: 24px;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    transition: transform var(--transition-fast);
}

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

.menu-toggle {
    display: none;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    font-size: 24px;
    cursor: pointer;
    padding: var(--spacing-xs);
    line-height: 1;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    min-width: 44px;
    min-height: 44px;
    align-items: center;
    justify-content: center;
}

.menu-toggle:hover {
    background: var(--glass-bg-hover);
    transform: scale(1.05);
}

.nav {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.nav a {
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    padding: var(--spacing-xs) var(--spacing-sm);
    min-height: 44px;
    display: flex;
    align-items: center;
    border-radius: var(--radius-sm);
    font-weight: 500;
    position: relative;
    overflow: hidden;
}

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

.nav a:hover {
    color: var(--text-primary);
    background: var(--glass-bg);
}

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

.search-form {
    display: flex;
    gap: var(--spacing-xs);
    flex: 1;
    max-width: 400px;
}

.search-form input {
    flex: 1;
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    color: var(--text-primary);
    font-size: 14px;
    min-height: 44px;
    transition: all var(--transition-fast);
    outline: none;
}

.search-form input:focus {
    background: var(--glass-bg-hover);
    border-color: rgba(102, 126, 234, 0.5);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.search-form input::placeholder {
    color: var(--text-muted);
}

.search-form button {
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--primary-gradient);
    color: white;
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    min-height: 44px;
    font-size: 14px;
    font-weight: 500;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.search-form button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.search-form button:active {
    transform: translateY(0);
}

/* ========== 广告位 - 玻璃态卡片 ========== */
.ad-header {
    margin: var(--spacing-md) auto;
    text-align: center;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    padding: var(--spacing-sm);
    border: 1px solid var(--glass-border);
}

.ad-header img {
    max-width: 960px;
    width: 100%;
    height: auto;
    border-radius: var(--radius-md);
}

.ad-header-category {
    margin: var(--spacing-sm) auto;
    text-align: center;
    max-width: 960px;
}

.ad-header-category img {
    max-width: 960px;
    width: 100%;
    height: auto;
    border-radius: var(--radius-md);
}

.ad-sidebar {
    margin: var(--spacing-md) 0;
    text-align: center;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    padding: var(--spacing-sm);
    border: 1px solid var(--glass-border);
}

.ad-footer {
    margin: var(--spacing-md) auto;
    text-align: center;
    max-width: 960px;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    padding: var(--spacing-sm);
    border: 1px solid var(--glass-border);
}

.ad-footer img {
    max-width: 960px;
    width: 100%;
    height: auto;
    border-radius: var(--radius-md);
}

/* 广告卡片 */
.ad-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--glass-border);
    transition: all var(--transition-normal);
}

.ad-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--glass-shadow);
    border-color: rgba(102, 126, 234, 0.3);
}

.ad-card-cover {
    position: relative;
    padding-top: 56.25%;
    background: rgba(255, 255, 255, 0.05);
}

.ad-card-cover img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.ad-card-label {
    position: absolute;
    top: var(--spacing-xs);
    right: var(--spacing-xs);
    background: var(--secondary-gradient);
    color: white;
    padding: 4px 10px;
    font-size: 11px;
    border-radius: var(--radius-full);
    z-index: 10;
    font-weight: 500;
}

.ad-card-content {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ========== 主内容区 ========== */
.main-content {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.content-left {
    flex: 1;
    min-width: 0;
}

.content-right {
    width: 320px;
    flex-shrink: 0;
}

/* ========== 板块标题 - 渐变装饰 ========== */
.section-title {
    font-size: 22px;
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-md);
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-weight: 600;
}

.section-title::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 24px;
    background: var(--primary-gradient);
    border-radius: var(--radius-full);
}

h1, h2, h3 {
    line-height: 1.3;
    margin-bottom: var(--spacing-sm);
}

/* ========== 视频网格 - 玻璃态卡片 ========== */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.video-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--glass-border);
    transition: all var(--transition-normal);
    touch-action: manipulation;
    will-change: transform;
    display: flex;
    flex-direction: column;
    height: 100%;
    position: relative;
}

.video-card::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-lg);
    padding: 1px;
    background: var(--primary-gradient);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity var(--transition-normal);
    pointer-events: none;
}

.video-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.video-card:hover::after {
    opacity: 1;
}

.video-card.loaded {
    opacity: 1;
    animation: fadeInUp 0.6s ease forwards;
}

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

.video-cover {
    position: relative;
    padding-top: 56.25%;
    background: rgba(255, 255, 255, 0.05);
    overflow: hidden;
    flex-shrink: 0;
}

.video-cover::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, 
        rgba(255,255,255,0.05) 0%, 
        rgba(255,255,255,0.1) 50%, 
        rgba(255,255,255,0.05) 100%);
    background-size: 200% 100%;
    animation: shimmer 2s infinite;
    z-index: 1;
}

@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

.video-cover img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transition: opacity var(--transition-normal), transform var(--transition-slow);
    z-index: 2;
}

.video-cover img.loaded,
.video-cover img[src] {
    opacity: 1;
}

.video-card:hover .video-cover img {
    transform: scale(1.05);
}

.video-info {
    padding: var(--spacing-sm);
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.video-title {
    font-size: 14px;
    margin-bottom: var(--spacing-xs);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    line-height: 1.4;
    color: var(--text-primary);
    font-weight: 500;
    transition: color var(--transition-fast);
}

.video-card:hover .video-title {
    color: #667eea;
}

.video-meta {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: var(--text-muted);
    flex-shrink: 0;
    gap: var(--spacing-xs);
}

.video-meta span {
    display: flex;
    align-items: center;
    gap: 4px;
}

/* ========== 侧边栏 - 玻璃态盒子 ========== */
.sidebar-box {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    border: 1px solid var(--glass-border);
    transition: all var(--transition-normal);
}

.sidebar-box:hover {
    border-color: rgba(102, 126, 234, 0.3);
}

.sidebar-box h3 {
    margin-bottom: var(--spacing-md);
    font-size: 16px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.video-list {
    list-style: none;
}

.video-list li {
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-fast);
}

.video-list li:last-child {
    border-bottom: none;
}

.video-list li:hover {
    padding-left: var(--spacing-xs);
}

.video-list a {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.video-list img {
    width: 100px;
    height: 60px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    flex-shrink: 0;
    transition: transform var(--transition-fast);
}

.video-list li:hover img {
    transform: scale(1.05);
}

.video-list-title {
    font-size: 13px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.video-list li:hover .video-list-title {
    color: var(--text-primary);
}

/* ========== 分类标签 - 渐变按钮 ========== */
.category-tags {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-sm) 0;
}

.category-tag {
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    font-size: 14px;
    transition: all var(--transition-fast);
    min-height: 36px;
    display: inline-flex;
    align-items: center;
    color: var(--text-secondary);
    font-weight: 500;
    cursor: pointer;
}

.category-tag:hover,
.category-tag.active {
    background: var(--primary-gradient);
    color: white;
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

/* ========== 底部 - 玻璃态页脚 ========== */
.footer {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border-top: 1px solid var(--glass-border);
    padding: var(--spacing-xl) 0;
    margin-top: var(--spacing-xl);
    text-align: center;
}

.footer p {
    margin-bottom: var(--spacing-xs);
    color: var(--text-secondary);
    text-align: center;
    font-size: 14px;
}

.footer a {
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
}

.footer a:hover {
    color: var(--text-primary);
    background: var(--glass-bg);
}

/* ========== 页面标题 ========== */
.page-title {
    padding: var(--spacing-xl) 0;
    font-size: 28px;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ========== 导航下拉菜单 - 玻璃态 ========== */
.nav-dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-toggle {
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    padding: var(--spacing-xs) var(--spacing-sm);
    min-height: 44px;
    display: flex;
    align-items: center;
    cursor: pointer;
    border-radius: var(--radius-sm);
}

.dropdown-toggle:hover {
    color: var(--text-primary);
    background: var(--glass-bg);
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: rgba(15, 15, 26, 0.95);
    backdrop-filter: blur(20px) saturate(180%);
    box-shadow: var(--glass-shadow);
    border-radius: var(--radius-md);
    min-width: 200px;
    z-index: 1000;
    padding: var(--spacing-xs) 0;
    max-height: 400px;
    overflow-y: auto;
    border: 1px solid var(--glass-border);
    margin-top: var(--spacing-xs);
    animation: dropdownSlide 0.3s ease;
}

@keyframes dropdownSlide {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.dropdown-menu a {
    color: var(--text-secondary);
    padding: var(--spacing-sm) var(--spacing-md);
    display: block;
    transition: all var(--transition-fast);
    font-size: 14px;
    white-space: nowrap;
    border-radius: var(--radius-sm);
    margin: 2px var(--spacing-xs);
}

.dropdown-menu a:hover {
    background: var(--glass-bg-hover);
    color: var(--text-primary);
    transform: translateX(4px);
}

.nav-dropdown:hover .dropdown-menu {
    display: block;
}

/* ========== 移动端响应式 - 深度优化 ========== */
@media screen and (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .header {
        padding: var(--spacing-xs) 0;
    }
    
    .header-content {
        flex-wrap: wrap;
        gap: var(--spacing-xs);
    }
    
    .logo {
        font-size: 20px;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .nav {
        display: none;
        width: 100%;
        order: 3;
        gap: var(--spacing-xs);
        font-size: 14px;
        flex-wrap: wrap;
        justify-content: center;
        padding: var(--spacing-xs) 0;
        background: var(--glass-bg);
        border-radius: var(--radius-md);
        margin-top: var(--spacing-xs);
    }
    
    .nav.show {
        display: flex;
        animation: fadeIn 0.3s ease;
    }
    
    @keyframes fadeIn {
        from { opacity: 0; }
        to { opacity: 1; }
    }
    
    .nav a {
        padding: var(--spacing-xs);
        min-height: 36px;
        display: inline-flex;
        align-items: center;
        border-radius: var(--radius-sm);
    }
    
    .nav a:hover {
        background: rgba(102, 126, 234, 0.2);
    }
    
    .search-form {
        width: 100%;
        order: 4;
        flex-direction: row;
        gap: var(--spacing-xs);
        margin-top: var(--spacing-xs);
        max-width: 100%;
    }
    
    .search-form input {
        flex: 1;
        min-height: 40px;
        font-size: 14px;
        border-radius: var(--radius-md);
    }
    
    .search-form button {
        padding: 0 var(--spacing-md);
        min-height: 40px;
        font-size: 14px;
        border-radius: var(--radius-md);
        white-space: nowrap;
    }
    
    .main-content {
        flex-direction: column;
    }
    
    .content-left {
        width: 100%;
    }
    
    .content-right {
        width: 100%;
    }
    
    .sidebar-box {
        display: none;
    }
    
    .ad-sidebar {
        display: none;
    }
    
    .video-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }
    
    .video-card {
        border-radius: var(--radius-md);
    }
    
    .video-info {
        padding: var(--spacing-xs);
    }
    
    .video-title {
        font-size: 13px;
        line-height: 1.4;
        min-height: 36px;
    }
    
    .video-meta {
        font-size: 11px;
    }
    
    .video-cover {
        border-radius: var(--radius-sm);
    }
    
    .category-tags {
        gap: var(--spacing-xs);
        overflow-x: auto;
        white-space: nowrap;
        padding-bottom: var(--spacing-xs);
        -webkit-overflow-scrolling: touch;
    }
    
    .category-tag {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 13px;
        border-radius: var(--radius-full);
        min-height: 36px;
        display: inline-flex;
        align-items: center;
        flex-shrink: 0;
    }
    
    .section-title {
        font-size: 18px;
        padding-left: var(--spacing-sm);
        margin-bottom: var(--spacing-sm);
    }
    
    .ad-footer img {
        max-width: 100%;
        height: auto;
    }
    
    body {
        font-size: 16px;
        line-height: 1.6;
    }
    
    h1, h2, h3 {
        line-height: 1.3;
        margin-bottom: var(--spacing-sm);
    }
}

@media screen and (max-width: 480px) {
    .logo {
        font-size: 18px;
        padding: var(--spacing-xs) 0;
    }
    
    .nav {
        gap: var(--spacing-xs);
        font-size: 13px;
    }
    
    .nav a {
        padding: var(--spacing-xs);
        min-height: 32px;
    }
    
    .search-form {
        gap: var(--spacing-xs);
    }
    
    .search-form input {
        min-height: 38px;
        font-size: 14px;
    }
    
    .search-form button {
        padding: 0 var(--spacing-sm);
        min-height: 38px;
    }
    
    .video-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-xs);
    }
    
    .video-title {
        font-size: 12px;
        line-height: 1.3;
        min-height: 32px;
    }
    
    .category-tag {
        padding: var(--spacing-xs);
        font-size: 12px;
    }
    
    .section-title {
        font-size: 16px;
    }
    
    .header {
        padding: var(--spacing-xs) 0;
    }
    
    .video-card {
        margin-bottom: var(--spacing-xs);
    }
}

/* 触摸设备优化 */
@media (hover: none) and (pointer: coarse) {
    .nav a {
        min-height: 44px;
    }
    
    .search-form button {
        min-height: 44px;
    }
    
    .video-card {
        touch-action: manipulation;
    }
    
    .category-tag {
        min-height: 44px;
    }
}

/* 移动端下拉菜单优化 */
@media screen and (max-width: 768px) {
    .nav-dropdown {
        width: auto;
    }
    
    .dropdown-menu {
        position: static;
        width: 100%;
        box-shadow: none;
        background: transparent;
        border-radius: 0;
        max-height: 200px;
        overflow-y: auto;
        display: none;
        padding: 0;
        margin-top: 0;
        border: none;
    }
    
    .dropdown-menu.show {
        display: block;
        animation: none;
    }
    
    .dropdown-menu a {
        color: var(--text-secondary);
        padding: var(--spacing-sm) var(--spacing-md);
        border-bottom: none;
        font-size: 13px;
        margin: 0;
    }
    
    .dropdown-menu a:hover {
        background: rgba(102, 126, 234, 0.2);
        color: var(--text-primary);
        transform: none;
    }
    
    .dropdown-toggle {
        justify-content: center;
    }
}

/* ========== 辅助动画类 ========== */
.animate-fade-in {
    animation: fadeIn 0.6s ease forwards;
}

.animate-slide-up {
    animation: slideUp 0.6s ease forwards;
}

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

/* ========== 加载骨架屏 ========== */
.skeleton {
    background: linear-gradient(90deg, 
        rgba(255,255,255,0.05) 0%, 
        rgba(255,255,255,0.1) 50%, 
        rgba(255,255,255,0.05) 100%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius-sm);
}

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

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

::-webkit-scrollbar-thumb {
    background: var(--glass-bg);
    border-radius: var(--radius-full);
    border: 2px solid var(--bg-darker);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--glass-bg-hover);
}

/* ========== 选择文本样式 ========== */
::selection {
    background: rgba(102, 126, 234, 0.3);
    color: white;
}