/* AI新闻系统 - 统一样式规范 */

/* ===== 基础变量定义 ===== */
:root {
    /* 现代化主色调 - 深蓝到紫色的渐变 */
    --primary-color: #4361ee;
    --secondary-color: #3a0ca3;
    --accent-color: #7209b7;
    --gradient-primary: linear-gradient(135deg, #4361ee 0%, #3a0ca3 50%, #7209b7 100%);
    --gradient-secondary: linear-gradient(135deg, #f72585 0%, #b5179e 50%, #7209b7 100%);
    
    /* 中性色系统 - 更现代的灰色调 */
    --text-primary: #1a1a2e;
    --text-secondary: #4a5568;
    --text-light: #f8fafc;
    --text-muted: #718096;
    --bg-primary: #ffffff;
    --bg-secondary: #f7fafc;
    --bg-tertiary: #edf2f7;
    --border-color: #e2e8f0;
    --border-hover: #cbd5e0;
    
    /* 功能色 - 更柔和的现代色调 */
    --success-color: #10b981;
    --success-light: #d1fae5;
    --warning-color: #f59e0b;
    --warning-light: #fef3c7;
    --error-color: #ef4444;
    --error-light: #fee2e2;
    --info-color: #3b82f6;
    --info-light: #dbeafe;
    
    /* 阴影系统 - 更精细的阴影层次 */
    --shadow-xs: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-md: 0 8px 25px rgba(0,0,0,0.12);
    --shadow-lg: 0 15px 35px rgba(0,0,0,0.15);
    --shadow-xl: 0 20px 50px rgba(0,0,0,0.2);
    --shadow-inner: inset 0 2px 4px rgba(0,0,0,0.06);
    
    /* 圆角系统 */
    --radius-xs: 4px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-2xl: 24px;
    --radius-full: 9999px;
    
    /* 间距系统 */
    --space-xs: 8px;
    --space-sm: 16px;
    --space-md: 24px;
    --space-lg: 32px;
    --space-xl: 48px;
    --space-2xl: 64px;
    --space-3xl: 96px;
    
    /* 字体系统 */
    --font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-md: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 20px;
    --font-size-2xl: 24px;
    --font-size-3xl: 30px;
    --font-size-4xl: 36px;
    --font-size-5xl: 48px;
    
    /* 动画时间 */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    --transition-bounce: 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* ===== 基础重置 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* ===== 动画性能优化 ===== */
/* 启用GPU加速和硬件加速 */
.animate-gpu {
    transform: translateZ(0);
    backface-visibility: hidden;
    perspective: 1000px;
}

/* 优化动画性能的通用类 */
.will-change-transform {
    will-change: transform;
}

.will-change-opacity {
    will-change: opacity;
}

.will-change-contents {
    will-change: contents;
}

/* 高性能动画优化类 */
.gpu-accelerated {
    transform: translate3d(0, 0, 0);
    backface-visibility: hidden;
    perspective: 1000px;
}

.optimized-transition {
    transition-property: transform, opacity, box-shadow;
    transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
    will-change: transform, opacity, box-shadow;
}

.performance-layer {
    transform: translateZ(0);
    will-change: transform;
    contain: layout style paint;
}

/* 强制GPU渲染层 */
.gpu-layer {
    transform: translate3d(0, 0, 0);
    backface-visibility: hidden;
    perspective: 1000px;
    will-change: transform;
}

/* 优化滚动性能 */
.scroll-optimized {
    transform: translateZ(0);
    will-change: transform;
    contain: layout style paint;
}

/* 高性能模糊效果 */
.optimized-blur {
    backdrop-filter: blur(10px);
    transform: translateZ(0);
    will-change: backdrop-filter, transform;
}

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

body {
    font-family: var(--font-family);
    line-height: 1.6;
    font-weight: 400;
    color: var(--text-primary);
    /* 优化背景动画：减少渐变数量和复杂度 */
    background: 
        radial-gradient(circle at 20% 80%, rgba(102, 126, 234, 0.1) 0%, transparent 60%),
        linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    background-size: 400% 400%, 400% 400%;
    position: relative;
    overflow-x: hidden;
    /* 优化动画性能 - 启用GPU加速 */
    transform: translate3d(0, 0, 0);
    will-change: background-position;
    backface-visibility: hidden;
    perspective: 1000px;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 10% 20%, rgba(255, 255, 255, 0.1) 0%, transparent 20%),
        radial-gradient(circle at 90% 80%, rgba(255, 255, 255, 0.05) 0%, transparent 20%);
    pointer-events: none;
    z-index: -1;
}

@keyframes gradientShift {
    0% { 
        background-position: 0% 50%, 0% 50%; 
    }
    50% { 
        background-position: 100% 50%, 100% 50%; 
    }
    100% { 
        background-position: 0% 50%, 0% 50%; 
    }
}

/* ===== 容器布局 ===== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    background: linear-gradient(145deg, 
        rgba(255, 255, 255, 0.95) 0%, 
        rgba(248, 250, 252, 0.98) 50%, 
        rgba(255, 255, 255, 0.95) 100%);
    backdrop-filter: blur(30px) saturate(180%);
    border-radius: 32px;
    padding: var(--space-3xl);
    box-shadow: 
        0 35px 70px rgba(67, 97, 238, 0.15),
        0 15px 35px rgba(0, 0, 0, 0.08),
        inset 0 1px 0 rgba(255, 255, 255, 0.6),
        0 0 0 1px rgba(255, 255, 255, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.7);
    animation: fadeInUp 1s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    margin-top: var(--space-2xl);
    margin-bottom: var(--space-2xl);
    position: relative;
    overflow: hidden;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    /* 启用GPU加速 */
    transform: translateZ(0);
    will-change: transform, box-shadow;
}



@keyframes shimmer {
    0% { left: -100%; }
    50% { left: 100%; }
    100% { left: 100%; }
}

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

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translate3d(0, 60px, 0) scale(0.9);
        /* 使用GPU友好的模糊效果 */
        filter: blur(10px);
    }
    to {
        opacity: 1;
        transform: translate3d(0, 0, 0) scale(1);
        filter: blur(0);
    }
}

.container:hover {
    transform: translate3d(0, -8px, 0) scale3d(1.005, 1.005, 1);
    box-shadow: 
        0 45px 90px rgba(67, 97, 238, 0.2),
        0 20px 40px rgba(0, 0, 0, 0.12),
        inset 0 1px 0 rgba(255, 255, 255, 0.8),
        0 0 0 1px rgba(255, 255, 255, 0.5);
}

/* ===== 标题样式 ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--space-md);
    letter-spacing: -0.02em;
}

h1 {
    font-size: 4rem;
    font-weight: 800;
    text-align: center;
    background: linear-gradient(135deg, 
        #4361ee 0%, 
        #3a0ca3 25%, 
        #7209b7 50%, 
        #f72585 75%, 
        #4361ee 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    background-size: 200% 200%;
    text-shadow: 0 8px 32px rgba(67, 97, 238, 0.4);
    margin-bottom: var(--space-xl);
    position: relative;
    display: inline-block;
    padding: 0 var(--space-lg);
    letter-spacing: -0.03em;
}



h1::before {
    content: '';
    position: absolute;
    top: -10px;
    left: 0;
    width: 100%;
    height: 100%;
    background: inherit;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: blur(20px);
    opacity: 0.5;
    z-index: -1;
}

h1::after {
    content: '';
    position: absolute;
    bottom: -16px;
    left: 50%;
    transform: translateX(-50%);
    width: 120px;
    height: 6px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    box-shadow: 0 4px 20px rgba(67, 97, 238, 0.5);
}

h2 {
    font-size: var(--font-size-3xl);
    color: var(--text-primary);
    font-weight: 700;
    margin-bottom: var(--space-md);
}

h3 {
    font-size: var(--font-size-2xl);
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

h4 {
    font-size: var(--font-size-xl);
    color: var(--text-secondary);
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

h5 {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: var(--space-xs);
}

h6 {
    font-size: var(--font-size-md);
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: var(--space-xs);
}

/* ===== 现代化按钮样式 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-lg) var(--space-2xl);
    background: linear-gradient(145deg, 
        rgba(67, 97, 238, 1) 0%, 
        rgba(102, 126, 234, 1) 50%, 
        rgba(67, 97, 238, 1) 100%);
    color: white;
    text-decoration: none;
    border-radius: 16px;
    font-weight: 700;
    border: none;
    cursor: pointer;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 
        0 8px 25px rgba(67, 97, 238, 0.3),
        0 4px 15px rgba(67, 97, 238, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.4);
    /* 启用GPU加速 */
    transform: translateZ(0);
    will-change: transform, box-shadow;
    position: relative;
    overflow: hidden;
    font-size: var(--font-size-md);
    letter-spacing: 0.02em;
    text-transform: none;
    min-height: 56px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(255, 255, 255, 0.6), 
        transparent);
    transition: left 0.8s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1;
}

.btn::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(145deg, 
        rgba(255, 255, 255, 0.1) 0%, 
        rgba(255, 255, 255, 0.05) 50%, 
        rgba(255, 255, 255, 0.1) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 1;
}

.btn:hover::before {
    left: 100%;
}

.btn:hover::after {
    opacity: 1;
}

.btn:hover {
    transform: translateY(-4px) scale(1.05);
    box-shadow: 
        0 15px 35px rgba(67, 97, 238, 0.5),
        0 8px 25px rgba(67, 97, 238, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.6);
    background: linear-gradient(145deg, 
        rgba(86, 113, 242, 1) 0%, 
        rgba(121, 142, 242, 1) 50%, 
        rgba(86, 113, 242, 1) 100%);
}

.btn:active {
    transform: translateY(-1px) scale(0.98);
    box-shadow: 
        0 4px 15px rgba(67, 97, 238, 0.4),
        inset 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: all 0.1s ease;
}

.btn-secondary {
    background: linear-gradient(145deg, 
        rgba(255, 255, 255, 0.95) 0%, 
        rgba(248, 250, 252, 0.98) 100%);
    color: var(--text-secondary);
    border: 2px solid rgba(67, 97, 238, 0.2);
    box-shadow: 
        0 6px 20px rgba(0, 0, 0, 0.08),
        inset 0 1px 0 rgba(255, 255, 255, 0.6);
}

.btn-secondary:hover {
    background: linear-gradient(145deg, 
        rgba(67, 97, 238, 0.1) 0%, 
        rgba(102, 126, 234, 0.15) 100%);
    color: var(--primary-color);
    border-color: rgba(67, 97, 238, 0.4);
    box-shadow: 
        0 10px 30px rgba(67, 97, 238, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.8);
}

.btn-success {
    background: linear-gradient(145deg, 
        rgba(16, 185, 129, 1) 0%, 
        rgba(52, 211, 153, 1) 50%, 
        rgba(16, 185, 129, 1) 100%);
    box-shadow: 
        0 8px 25px rgba(16, 185, 129, 0.3),
        0 4px 15px rgba(16, 185, 129, 0.2);
}

.btn-success:hover {
    background: linear-gradient(145deg, 
        rgba(5, 150, 105, 1) 0%, 
        rgba(16, 185, 129, 1) 50%, 
        rgba(5, 150, 105, 1) 100%);
    box-shadow: 
        0 15px 35px rgba(16, 185, 129, 0.5),
        0 8px 25px rgba(16, 185, 129, 0.3);
}

.btn-warning {
    background: linear-gradient(145deg, 
        rgba(245, 158, 11, 1) 0%, 
        rgba(251, 191, 36, 1) 50%, 
        rgba(245, 158, 11, 1) 100%);
    box-shadow: 
        0 8px 25px rgba(245, 158, 11, 0.3),
        0 4px 15px rgba(245, 158, 11, 0.2);
}

.btn-warning:hover {
    background: linear-gradient(145deg, 
        rgba(217, 119, 6, 1) 0%, 
        rgba(245, 158, 11, 1) 50%, 
        rgba(217, 119, 6, 1) 100%);
    box-shadow: 
        0 15px 35px rgba(245, 158, 11, 0.5),
        0 8px 25px rgba(245, 158, 11, 0.3);
}

.btn-error {
    background: linear-gradient(145deg, 
        rgba(239, 68, 68, 1) 0%, 
        rgba(248, 113, 113, 1) 50%, 
        rgba(239, 68, 68, 1) 100%);
    box-shadow: 
        0 8px 25px rgba(239, 68, 68, 0.3),
        0 4px 15px rgba(239, 68, 68, 0.2);
}

.btn-error:hover {
    background: linear-gradient(145deg, 
        rgba(220, 38, 38, 1) 0%, 
        rgba(239, 68, 68, 1) 50%, 
        rgba(220, 38, 38, 1) 100%);
    box-shadow: 
        0 15px 35px rgba(239, 68, 68, 0.5),
        0 8px 25px rgba(239, 68, 68, 0.3);
}

.btn-info {
    background: linear-gradient(145deg, 
        rgba(59, 130, 246, 1) 0%, 
        rgba(96, 165, 250, 1) 50%, 
        rgba(59, 130, 246, 1) 100%);
    box-shadow: 
        0 8px 25px rgba(59, 130, 246, 0.3),
        0 4px 15px rgba(59, 130, 246, 0.2);
}

.btn-info:hover {
    background: linear-gradient(145deg, 
        rgba(29, 78, 216, 1) 0%, 
        rgba(59, 130, 246, 1) 50%, 
        rgba(29, 78, 216, 1) 100%);
    box-shadow: 
        0 15px 35px rgba(59, 130, 246, 0.5),
        0 8px 25px rgba(59, 130, 246, 0.3);
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid rgba(67, 97, 238, 0.6);
    box-shadow: none;
    backdrop-filter: blur(15px);
}

.btn-outline:hover {
    background: linear-gradient(145deg, 
        rgba(67, 97, 238, 0.1) 0%, 
        rgba(102, 126, 234, 0.2) 100%);
    color: var(--primary-color);
    border-color: rgba(67, 97, 238, 0.8);
    box-shadow: 
        0 10px 30px rgba(67, 97, 238, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.6);
}

.btn-sm {
    padding: var(--space-md) var(--space-lg);
    font-size: var(--font-size-sm);
    min-height: 44px;
    border-radius: 12px;
    box-shadow: 
        0 4px 15px rgba(67, 97, 238, 0.25),
        0 2px 8px rgba(67, 97, 238, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.btn-sm:hover {
    transform: translateY(-2px) scale(1.03);
    box-shadow: 
        0 8px 25px rgba(67, 97, 238, 0.4),
        0 4px 15px rgba(67, 97, 238, 0.25),
        inset 0 1px 0 rgba(255, 255, 255, 0.4);
}

.btn-lg {
    padding: var(--space-xl) var(--space-3xl);
    font-size: var(--font-size-lg);
    min-height: 68px;
    border-radius: 20px;
    box-shadow: 
        0 12px 35px rgba(67, 97, 238, 0.35),
        0 6px 20px rgba(67, 97, 238, 0.25),
        inset 0 1px 0 rgba(255, 255, 255, 0.5);
    font-weight: 800;
    letter-spacing: 0.03em;
}

.btn-lg:hover {
    transform: translateY(-6px) scale(1.08);
    box-shadow: 
        0 20px 45px rgba(67, 97, 238, 0.6),
        0 12px 35px rgba(67, 97, 238, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.7);
}

/* ===== 图标按钮样式 ===== */
.btn-icon {
    width: 48px;
    height: 48px;
    padding: 0;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: auto;
    box-shadow: 
        0 6px 20px rgba(67, 97, 238, 0.3),
        0 3px 12px rgba(67, 97, 238, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.4);
}

.btn-icon:hover {
    transform: translateY(-3px) scale(1.1);
    box-shadow: 
        0 12px 30px rgba(67, 97, 238, 0.5),
        0 6px 20px rgba(67, 97, 238, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.6);
}

.btn-icon .btn-icon {
    font-size: var(--font-size-xl);
    margin: 0;
}

/* ===== 表单样式 ===== */
.form-group {
    margin-bottom: var(--space-lg);
}

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

.form-input {
    width: 100%;
    padding: var(--space-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: var(--font-size-md);
    transition: all 0.3s ease;
    background: var(--bg-primary);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

/* ===== 卡片样式 ===== */
.card {
    background: linear-gradient(145deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    border-radius: var(--radius-2xl);
    padding: var(--space-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid rgba(255, 255, 255, 0.5);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
    opacity: 0.8;
}

.card:hover {
    transform: translateY(-6px) scale(1.02);
    box-shadow: var(--shadow-xl);
    border-color: rgba(255, 255, 255, 0.8);
}

.card-header {
    margin-bottom: var(--space-md);
}

.card-title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-sm);
    font-weight: 700;
    color: var(--text-primary);
}

.card-content {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===== 新闻网格样式 ===== */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
    gap: var(--space-2xl);
    margin-bottom: var(--space-3xl);
}

.news-card {
    background: linear-gradient(145deg, 
        rgba(255, 255, 255, 0.95) 0%, 
        rgba(248, 250, 252, 0.98) 50%, 
        rgba(255, 255, 255, 0.95) 100%);
    border-radius: 24px;
    padding: var(--space-2xl);
    box-shadow: 
        0 20px 40px rgba(67, 97, 238, 0.08),
        0 8px 25px rgba(0, 0, 0, 0.06),
        inset 0 1px 0 rgba(255, 255, 255, 0.6),
        0 0 0 1px rgba(255, 255, 255, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.7);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(20px) saturate(180%);
    cursor: pointer;
    transform-style: preserve-3d;
    perspective: 1000px;
    /* 启用GPU加速 */
    transform: translateZ(0);
    will-change: transform, box-shadow;
}

.news-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, 
        rgba(67, 97, 238, 0.03) 0%, 
        rgba(102, 126, 234, 0.05) 50%, 
        rgba(67, 97, 238, 0.03) 100%);
    opacity: 0;
    transition: opacity 0.4s ease;
    z-index: 1;
}

.news-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(255, 255, 255, 0.6), 
        transparent);
    transition: left 0.6s ease;
    z-index: 2;
}

.news-card:hover {
    transform: translate3d(0, -12px, 0) scale3d(1.03, 1.03, 1) rotateX(2deg);
    box-shadow: 
        0 35px 70px rgba(67, 97, 238, 0.15),
        0 15px 35px rgba(0, 0, 0, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.8),
        0 0 0 1px rgba(255, 255, 255, 0.5);
    border-color: rgba(255, 255, 255, 0.9);
}

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

.news-card:hover::after {
    left: 100%;
}

.news-card-header {
    margin-bottom: var(--space-lg);
    position: relative;
    z-index: 3;
}

.news-category {
    display: inline-block;
    margin-bottom: var(--space-sm);
}

.category-badge {
    background: var(--gradient-primary);
    color: white;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: var(--font-size-sm);
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    box-shadow: 0 4px 12px rgba(67, 97, 238, 0.3);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    /* 启用GPU加速 */
    transform: translateZ(0);
    will-change: transform, box-shadow;
}

.news-card:hover .category-badge {
    transform: scale3d(1.05, 1.05, 1);
    box-shadow: 0 6px 20px rgba(67, 97, 238, 0.4);
}

.news-meta {
    display: flex;
    gap: var(--space-lg);
    align-items: center;
    flex-wrap: wrap;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.meta-icon {
    font-size: var(--font-size-md);
    opacity: 0.7;
}

.news-card-body {
    position: relative;
    z-index: 3;
    margin-bottom: var(--space-lg);
}

.news-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-md);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: color 0.3s ease;
}

.news-title-link {
    text-decoration: none;
    color: inherit;
    background: linear-gradient(120deg, transparent 0%, transparent 50%, var(--primary-color) 50%);
    background-size: 220% 100%;
    background-position: 100% 0;
    transition: all 0.4s ease;
    padding: 4px 0;
    border-radius: 4px;
}

.news-title-link:hover {
    background-position: 0 0;
    color: white;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.news-summary {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: var(--font-size-md);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: var(--space-md);
}

.news-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    z-index: 3;
    padding-top: var(--space-md);
    border-top: 1px solid rgba(255, 255, 255, 0.5);
}

/* ===== 新闻卡片按钮样式 ===== */
.news-actions {
    display: flex;
    gap: var(--space-md);
    align-items: center;
}

.action-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    background: linear-gradient(135deg, rgba(67, 97, 238, 0.1) 0%, rgba(102, 126, 234, 0.05) 100%);
    color: var(--primary-color);
    text-decoration: none;
    border-radius: 16px;
    font-weight: 600;
    font-size: var(--font-size-sm);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid rgba(67, 97, 238, 0.2);
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.action-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(67, 97, 238, 0.1), transparent);
    transition: left 0.6s ease;
}

.action-btn:hover {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    transform: translate3d(0, -2px, 0) scale3d(1.05, 1.05, 1);
    box-shadow: 0 8px 25px rgba(67, 97, 238, 0.3);
    border-color: transparent;
}

.action-btn:hover::before {
    left: 100%;
}

.btn-icon {
    font-size: var(--font-size-lg);
    transition: transform 0.3s ease;
}

.action-btn:hover .btn-icon {
    transform: scale(1.2);
}

/* ===== 新闻统计样式 ===== */
.news-stats {
    display: flex;
    gap: var(--space-lg);
    align-items: center;
}

.stats-item {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-muted);
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: all 0.3s ease;
}

.stats-icon {
    font-size: var(--font-size-md);
    opacity: 0.7;
    transition: all 0.3s ease;
}

.stats-count {
    font-weight: 600;
    color: var(--text-primary);
    transition: all 0.3s ease;
}

.news-card:hover .stats-item {
    color: var(--text-secondary);
}

.news-card:hover .stats-icon {
    opacity: 1;
    transform: scale(1.1);
}

.news-card:hover .stats-count {
    color: var(--primary-color);
}

/* ===== 网格布局 ===== */
.grid {
    display: grid;
    gap: var(--space-lg);
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* ===== 导航菜单样式 ===== */
.navigation-section {
    margin-bottom: var(--space-3xl);
    position: relative;
}

.search-section {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
    flex-wrap: wrap;
    justify-content: space-between;
}

.search-form {
    flex: 1;
    min-width: 300px;
    max-width: 600px;
}

.search-input-wrapper {
    display: flex;
    align-items: center;
    background: linear-gradient(145deg, 
        rgba(255, 255, 255, 0.95) 0%, 
        rgba(248, 250, 252, 0.98) 100%);
    border-radius: 24px;
    padding: 4px;
    box-shadow: 
        0 15px 35px rgba(67, 97, 238, 0.1),
        0 8px 25px rgba(0, 0, 0, 0.08),
        inset 0 1px 0 rgba(255, 255, 255, 0.6),
        0 0 0 1px rgba(255, 255, 255, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.7);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(20px);
    /* 启用GPU加速 */
    transform: translateZ(0);
    will-change: transform, box-shadow;
}

.search-input-wrapper:hover,
.search-input-wrapper.focused {
    transform: translateY(-4px);
    box-shadow: 
        0 25px 50px rgba(67, 97, 238, 0.15),
        0 12px 30px rgba(0, 0, 0, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.8),
        0 0 0 1px rgba(255, 255, 255, 0.5);
}

.search-icon {
    padding: var(--space-md);
    font-size: var(--font-size-xl);
    color: var(--primary-color);
    opacity: 0.7;
    transition: all 0.3s ease;
}

.search-input-wrapper:hover .search-icon,
.search-input-wrapper.focused .search-icon {
    opacity: 1;
    transform: scale(1.1);
}

.search-input {
    flex: 1;
    border: none;
    background: transparent;
    padding: var(--space-md);
    font-size: var(--font-size-lg);
    color: var(--text-primary);
    outline: none;
    font-weight: 500;
}

.search-input::placeholder {
    color: var(--text-muted);
    font-weight: 400;
}

.search-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: var(--space-md) var(--space-xl);
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: 20px;
    font-weight: 600;
    font-size: var(--font-size-md);
    cursor: pointer;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 8px 25px rgba(67, 97, 238, 0.3);
    position: relative;
    overflow: hidden;
    /* 启用GPU加速 */
    transform: translateZ(0);
    will-change: transform, box-shadow;
}

.search-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.6s ease;
}

.search-btn:hover {
    transform: translate3d(0, -2px, 0) scale3d(1.05, 1.05, 1);
    box-shadow: 0 12px 35px rgba(67, 97, 238, 0.4);
}

.search-btn:hover::before {
    left: 100%;
}

.quick-actions {
    display: flex;
    gap: var(--space-md);
    align-items: center;
}

.quick-action-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: var(--space-md) var(--space-lg);
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9) 0%, rgba(248, 250, 252, 0.95) 100%);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: 16px;
    font-weight: 600;
    font-size: var(--font-size-sm);
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.5);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    backdrop-filter: blur(10px);
}

.quick-action-btn:hover {
    background: var(--gradient-primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(67, 97, 238, 0.3);
    border-color: transparent;
}

/* ===== 导航标签样式 ===== */
.nav-tabs {
    margin-bottom: var(--space-xl);
}

.nav-tabs-container {
    display: flex;
    gap: var(--space-md);
    align-items: center;
    flex-wrap: wrap;
    justify-content: center;
}

.nav-tab {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: var(--space-md) var(--space-xl);
    background: linear-gradient(145deg, 
        rgba(255, 255, 255, 0.9) 0%, 
        rgba(248, 250, 252, 0.95) 100%);
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 20px;
    font-weight: 600;
    font-size: var(--font-size-md);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid rgba(255, 255, 255, 0.5);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
    backdrop-filter: blur(15px);
    position: relative;
    overflow: hidden;
    /* 启用GPU加速 */
    transform: translateZ(0);
    will-change: transform, box-shadow;
}

.nav-tab::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(67, 97, 238, 0.1), transparent);
    transition: left 0.6s ease;
}

.nav-tab:hover {
    background: var(--gradient-primary);
    color: white;
    transform: translate3d(0, -4px, 0) scale3d(1.05, 1.05, 1);
    box-shadow: 0 15px 35px rgba(67, 97, 238, 0.3);
    border-color: transparent;
}

.nav-tab:hover::before {
    left: 100%;
}

.nav-tab.active {
    background: var(--gradient-primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 12px 30px rgba(67, 97, 238, 0.4);
    border-color: transparent;
}

.tab-icon {
    font-size: var(--font-size-lg);
    transition: transform 0.3s ease;
}

.nav-tab:hover .tab-icon {
    transform: scale(1.2);
}

.tab-badge {
    background: rgba(255, 255, 255, 0.2);
    color: inherit;
    padding: 4px 8px;
    border-radius: 12px;
    font-size: var(--font-size-sm);
    font-weight: 700;
    backdrop-filter: blur(10px);
}

/* ===== 分类下拉菜单样式 ===== */
.category-dropdown {
    position: relative;
    display: inline-block;
}

.category-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 320px;
    background: linear-gradient(145deg, 
        rgba(255, 255, 255, 0.98) 0%, 
        rgba(248, 250, 252, 0.99) 100%);
    backdrop-filter: blur(30px) saturate(180%);
    border-radius: 24px;
    box-shadow: 
        0 25px 50px rgba(67, 97, 238, 0.15),
        0 15px 35px rgba(0, 0, 0, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.6),
        0 0 0 1px rgba(255, 255, 255, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.7);
    padding: var(--space-lg);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-20px) scale(0.95);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    margin-top: var(--space-md);
}

.category-menu.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

.category-menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid rgba(67, 97, 238, 0.1);
}

.category-menu-header h3 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.close-menu {
    background: none;
    border: none;
    font-size: var(--font-size-2xl);
    color: var(--text-muted);
    cursor: pointer;
    padding: var(--space-xs);
    border-radius: 8px;
    transition: all 0.3s ease;
}

.close-menu:hover {
    background: rgba(67, 97, 238, 0.1);
    color: var(--primary-color);
    transform: scale(1.1);
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
}

.category-card {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md);
    background: linear-gradient(145deg, 
        rgba(255, 255, 255, 0.9) 0%, 
        rgba(248, 250, 252, 0.95) 100%);
    border-radius: 16px;
    text-decoration: none;
    color: var(--text-secondary);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid rgba(255, 255, 255, 0.5);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
    backdrop-filter: blur(10px);
}

.category-card:hover {
    background: var(--gradient-primary);
    color: white;
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 12px 30px rgba(67, 97, 238, 0.3);
    border-color: transparent;
}

.category-card.active {
    background: var(--gradient-primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(67, 97, 238, 0.3);
}

.category-icon-wrapper {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: rgba(67, 97, 238, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.category-card:hover .category-icon-wrapper {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.1);
}

.category-icon {
    font-size: var(--font-size-xl);
}

.category-name {
    font-weight: 600;
    font-size: var(--font-size-md);
    flex: 1;
}

.category-arrow {
    font-size: var(--font-size-lg);
    font-weight: bold;
    opacity: 0;
    transition: all 0.3s ease;
}

.category-card:hover .category-arrow {
    opacity: 1;
    transform: translateX(4px);
}

/* 移动端响应式样式 */
@media (max-width: 768px) {
    .category-dropdown-menu {
        position: fixed;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%) scale(0.9);
        min-width: 280px;
        max-width: 90vw;
        max-height: 80vh;
        overflow-y: auto;
    }
    
    .category-dropdown-menu.show {
        transform: translate(-50%, -50%) scale(1);
    }
    
    .category-dropdown-item {
        padding: var(--space-md) var(--space-lg);
        font-size: var(--font-size-lg);
    }
    
    .category-icon {
        font-size: var(--font-size-xl);
        width: 28px;
    }
}

/* ===== 移动端导航菜单 ===== */
.nav-toggle {
    display: none;
    background: var(--gradient-primary);
    color: var(--text-light);
    border: none;
    padding: var(--space-sm);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.nav-toggle:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

/* ===== 用户状态样式 ===== */
.user-status {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
    justify-content: flex-end;
    flex-wrap: wrap;
}

.user-info {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-2xl);
    box-shadow: 
        0 4px 20px rgba(0, 0, 0, 0.08),
        0 0 0 1px rgba(255, 255, 255, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.4);
    transition: all var(--transition-normal);
}

.user-info:hover {
    transform: translateY(-2px);
    box-shadow: 
        0 8px 30px rgba(0, 0, 0, 0.12),
        0 0 0 1px rgba(255, 255, 255, 0.4);
}

.user-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    font-weight: 700;
    font-size: var(--font-size-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

.user-info:hover .user-avatar {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.user-name {
    font-weight: 600;
    color: var(--text-primary);
    font-size: var(--font-size-lg);
}

.role-badge {
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    box-shadow: var(--shadow-xs);
}

.auth-buttons {
    display: flex;
    gap: var(--space-sm);
    align-items: center;
}

/* ===== 分页样式 ===== */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-sm);
    margin-top: var(--space-2xl);
    flex-wrap: wrap;
}

.pagination a, .pagination span {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 48px;
    height: 48px;
    padding: 0 var(--space-md);
    border-radius: var(--radius-lg);
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-normal);
    font-size: var(--font-size-md);
    border: 2px solid transparent;
}

.pagination a {
    background: rgba(255, 255, 255, 0.9);
    color: var(--text-secondary);
    border-color: var(--border-color);
    box-shadow: var(--shadow-sm);
    backdrop-filter: blur(10px);
}

.pagination a:hover {
    background: var(--gradient-primary);
    color: var(--text-light);
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.pagination .current {
    background: var(--gradient-primary);
    color: var(--text-light);
    border-color: transparent;
    box-shadow: var(--shadow-md);
    transform: scale(1.05);
}

.pagination .disabled {
    background: var(--bg-tertiary);
    color: var(--text-muted);
    border-color: var(--border-color);
    cursor: not-allowed;
    opacity: 0.6;
}

.pagination .current {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--text-light);
    border: 2px solid transparent;
    box-shadow: var(--shadow-md);
}

.pagination .disabled {
    background: rgba(255, 255, 255, 0.5);
    color: var(--text-secondary);
    border: 2px solid var(--border-color);
    cursor: not-allowed;
    box-shadow: var(--shadow-sm);
}

/* ===== 消息提示样式 ===== */
.alert {
    padding: var(--space-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
    border-left: 4px solid;
}

.alert-success {
    background: rgba(39, 174, 96, 0.1);
    border-color: var(--success-color);
    color: var(--success-color);
}

.alert-warning {
    background: rgba(243, 156, 18, 0.1);
    border-color: var(--warning-color);
    color: var(--warning-color);
}

.alert-error {
    background: rgba(231, 76, 60, 0.1);
    border-color: var(--error-color);
    color: var(--error-color);
}

.alert-info {
    background: rgba(52, 152, 219, 0.1);
    border-color: var(--info-color);
    color: var(--info-color);
}

/* ===== 响应式设计 ===== */
@media (max-width: 1200px) {
    .container {
        max-width: 100%;
        padding: var(--space-lg);
    }
    
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-lg);
    }
    
    .admin-stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    body {
        padding: var(--space-md);
    }
    
    .container {
        padding: var(--space-md);
        border-radius: var(--radius-md);
    }
    
    h1 {
        font-size: var(--font-size-2xl);
        margin-bottom: var(--space-lg);
    }
    
    h2 {
        font-size: var(--font-size-xl);
    }
    
    h3 {
        font-size: var(--font-size-lg);
    }
    
    .user-status {
        justify-content: center;
        margin-bottom: var(--space-md);
        flex-direction: column;
        gap: var(--space-md);
        align-items: stretch;
    }
    
    .user-info {
        flex-direction: column;
        text-align: center;
        gap: var(--space-sm);
    }
    
    .auth-buttons {
        flex-direction: column;
        gap: var(--space-sm);
    }
    
    .nav-menu {
        gap: var(--space-xs);
        flex-direction: column;
        gap: var(--space-sm);
        padding: var(--space-lg);
        margin-bottom: var(--space-lg);
    }
    
    .nav-item {
        padding: var(--space-sm) var(--space-md);
        font-size: var(--font-size-sm);
        width: 100%;
        text-align: center;
        padding: var(--space-md);
    }
    
    .nav-toggle {
        display: block;
        margin-bottom: var(--space-md);
    }
    
    .nav-menu.mobile-hidden {
        display: none;
    }
    
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .news-grid {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .btn {
        width: 100%;
        min-height: 48px;
    }
    
    .pagination {
        gap: var(--space-xs);
    }
    
    .pagination a, .pagination span {
        min-width: 40px;
        height: 40px;
        font-size: var(--font-size-sm);
    }
    
    .admin-stats-grid {
        grid-template-columns: 1fr;
    }
    
    .admin-nav-tabs {
        flex-direction: column;
    }
    
    .admin-nav-tab {
        border-radius: 0;
    }
    
    .card {
        padding: var(--space-lg);
    }
    
    .form-input {
        padding: var(--space-sm);
    }
}

@media (max-width: 480px) {
    body {
        padding: var(--space-sm);
    }
    
    .container {
        padding: var(--space-sm);
        border-radius: var(--radius-sm);
    }
    
    h1 {
        font-size: var(--font-size-xl);
        margin-bottom: var(--space-md);
    }
    
    .nav-menu {
        padding: var(--space-md);
        border-radius: var(--radius-lg);
    }
    
    .nav-item {
        padding: var(--space-sm);
        font-size: var(--font-size-sm);
    }
    
    .news-grid {
        gap: var(--space-sm);
    }
    
    .news-item {
        padding: var(--space-md);
    }
    
    .news-item h2 {
        font-size: var(--font-size-md);
        -webkit-line-clamp: 3;
        line-clamp: 3;
    }
    
    .pagination {
        flex-wrap: nowrap;
        overflow-x: auto;
        justify-content: flex-start;
        padding-bottom: var(--space-sm);
    }
    
    .pagination a, .pagination span {
        min-width: 36px;
        height: 36px;
        font-size: var(--font-size-xs);
    }
    
    .card {
        padding: var(--space-md);
        border-radius: var(--radius-lg);
    }
    
    .btn {
        padding: var(--space-sm) var(--space-md);
        font-size: var(--font-size-sm);
        min-height: 44px;
    }
}

/* ===== 平板设备优化 ===== */
@media (min-width: 769px) and (max-width: 1024px) {
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-xl);
    }
    
    .container {
        padding: var(--space-xl);
    }
    
    .nav-menu {
        gap: var(--space-sm);
    }
    
    .nav-item {
        padding: var(--space-sm) var(--space-md);
    }
}

/* ===== 高分辨率屏幕优化 ===== */
@media (min-width: 1440px) {
    .container {
        max-width: 1400px;
    }
    
    .news-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: var(--space-2xl);
    }
    
    h1 {
        font-size: var(--font-size-4xl);
    }
}

/* ===== 横屏模式优化 ===== */
@media (max-height: 500px) and (orientation: landscape) {
    .container {
        padding: var(--space-sm);
    }
    
    .nav-menu {
        margin-bottom: var(--space-md);
        padding: var(--space-sm) var(--space-md);
    }
    
    .news-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-md);
    }
}

/* ===== 新闻详情页样式 ===== */
.news-detail {
    background: linear-gradient(145deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    border-radius: var(--radius-2xl);
    padding: var(--space-2xl);
    box-shadow: var(--shadow-xl);
    border: 1px solid rgba(255, 255, 255, 0.5);
    margin-bottom: var(--space-2xl);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.news-detail::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
    opacity: 0.8;
}

.news-title {
    font-size: var(--font-size-3xl);
    color: var(--text-primary);
    font-weight: 800;
    margin-bottom: var(--space-lg);
    line-height: 1.3;
    text-align: center;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}

.news-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
}

.news-meta {
    display: flex;
    justify-content: center;
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
    padding: var(--space-md);
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.2);
    flex-wrap: wrap;
}

.news-meta span {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.news-meta span::before {
    content: '•';
    color: var(--primary-color);
    font-weight: bold;
    margin-right: var(--space-xs);
}

.news-image {
    margin-bottom: var(--space-xl);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    position: relative;
}

.news-image img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.news-image:hover img {
    transform: scale(1.02);
}

.news-content {
    font-size: var(--font-size-lg);
    line-height: 1.8;
    color: var(--text-primary);
    margin-bottom: var(--space-2xl);
}

.news-content p {
    margin-bottom: var(--space-lg);
}

.news-content h2, .news-content h3 {
    margin: var(--space-xl) 0 var(--space-lg) 0;
    color: var(--text-secondary);
}

.news-content blockquote {
    border-left: 4px solid var(--primary-color);
    padding: var(--space-md) var(--space-lg);
    background: rgba(102, 126, 234, 0.05);
    border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
    margin: var(--space-lg) 0;
    font-style: italic;
}

.news-actions {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    padding-top: var(--space-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.2);
}

/* ===== 评论区域样式 ===== */
.comments-section {
    background: linear-gradient(145deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    border-radius: var(--radius-2xl);
    padding: var(--space-2xl);
    box-shadow: var(--shadow-xl);
    border: 1px solid rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(10px);
}

.comments-section h2 {
    font-size: var(--font-size-2xl);
    color: var(--text-primary);
    margin-bottom: var(--space-xl);
    text-align: center;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.comment-form {
    margin-bottom: var(--space-2xl);
    padding: var(--space-xl);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-xl);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.comment-form textarea {
    width: 100%;
    min-height: 120px;
    padding: var(--space-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: var(--font-size-md);
    resize: vertical;
    transition: all var(--transition-normal);
}

.comment-form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.login-prompt {
    text-align: center;
    padding: var(--space-xl);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--text-secondary);
}

.login-prompt a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

.login-prompt a:hover {
    text-decoration: underline;
}

.comments-list {
    gap: var(--space-lg);
}

.comment-item {
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    margin-bottom: var(--space-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.comment-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--gradient-primary);
    opacity: 0.6;
}

.comment-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    background: rgba(255, 255, 255, 0.08);
}

.comment-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-md);
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.comment-header strong {
    color: var(--text-primary);
    font-size: var(--font-size-md);
    font-weight: 600;
}

.comment-date {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

.comment-content {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: var(--font-size-md);
}

.no-comments {
    text-align: center;
    padding: var(--space-2xl);
    color: var(--text-muted);
    font-style: italic;
}

/* ===== 打印样式 ===== */
@media print {
    .nav-menu,
    .user-status,
    .pagination,
    .btn {
        display: none !important;
    }
    
    .container {
        max-width: 100%;
        padding: 0;
        box-shadow: none;
        background: white;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #ddd;
        break-inside: avoid;
    }
    
    .news-item {
        break-inside: avoid;
        margin-bottom: 20px;
    }
}

/* ===== 工具类 ===== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.hidden { display: none; }
.flex { display: flex; }
.grid { display: grid; }

.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-end { justify-content: flex-end; }

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

/* ===== 动画效果 ===== */
.fade-in {
    animation: fadeIn 0.6s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.slide-up {
    animation: slideUp 0.8s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translate3d(0, 30px, 0);
    }
    to {
        opacity: 1;
        transform: translate3d(0, 0, 0);
    }
}

.pulse {
    animation: pulse 2s infinite;
}

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

/* ===== 现代化交互效果 ===== */
.hover-lift {
    transition: all var(--transition-normal);
}

.hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.hover-scale {
    transition: all var(--transition-normal);
}

.hover-scale:hover {
    transform: scale(1.03);
}

.hover-glow {
    transition: all var(--transition-normal);
}

.hover-glow:hover {
    box-shadow: 0 0 20px rgba(102, 126, 234, 0.3);
}

.hover-shake {
    transition: all var(--transition-normal);
}

.hover-shake:hover {
    animation: shake 0.5s ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-2px); }
    75% { transform: translateX(2px); }
}

/* ===== 加载动画 ===== */
.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-dots {
    display: inline-flex;
    gap: 4px;
}

.loading-dots span {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--primary-color);
    animation: bounce 1.4s infinite ease-in-out;
}

.loading-dots span:nth-child(1) { animation-delay: -0.32s; }
.loading-dots span:nth-child(2) { animation-delay: -0.16s; }

@keyframes bounce {
    0%, 80%, 100% {
        transform: scale(0);
        opacity: 0.5;
    }
    40% {
        transform: scale(1);
        opacity: 1;
    }
}

/* ===== 页面过渡效果 ===== */
.page-transition {
    animation: pageTransition 0.6s ease-out;
}

@keyframes pageTransition {
    from {
        opacity: 0;
        transform: translate3d(0, 20px, 0);
    }
    to {
        opacity: 1;
        transform: translate3d(0, 0, 0);
    }
}

/* ===== 滚动动画 ===== */
.scroll-reveal {
    opacity: 0;
    transform: translate3d(0, 30px, 0);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
    /* 启用GPU加速 */
    will-change: transform, opacity;
}

.scroll-reveal.revealed {
    opacity: 1;
    transform: translate3d(0, 0, 0);
}

/* ===== 按钮点击效果 ===== */
.btn-click {
    position: relative;
    overflow: hidden;
}

.btn-click::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn-click:active::after {
    width: 300px;
    height: 300px;
}

/* ===== 输入框聚焦效果 ===== */
.input-focus {
    transition: all var(--transition-normal);
}

.input-focus:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    transform: translateY(-1px);
}

/* ===== 卡片悬停效果 ===== */
.card-hover {
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    cursor: pointer;
    /* 启用GPU加速 */
    transform: translateZ(0);
    will-change: transform, box-shadow;
}

.card-hover:hover {
    transform: translate3d(0, -5px, 0);
    box-shadow: var(--shadow-lg);
}

/* ===== 渐变文字效果 ===== */
.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===== 边框动画效果 ===== */
.border-animate {
    position: relative;
    border: 2px solid transparent;
    background: linear-gradient(var(--bg-primary), var(--bg-primary)) padding-box,
                var(--gradient-primary) border-box;
    border-radius: var(--radius-lg);
}

/* ===== 打字机效果 ===== */
.typewriter {
    overflow: hidden;
    border-right: 2px solid var(--primary-color);
    white-space: nowrap;
    animation: typing 3.5s steps(40, end), blink-caret 0.75s step-end infinite;
}

@keyframes typing {
    from { width: 0; }
    to { width: 100%; }
}

@keyframes blink-caret {
    from, to { border-color: transparent; }
    50% { border-color: var(--primary-color); }
}

/* ===== 管理员面板样式 ===== */
.admin-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--text-light);
    padding: var(--space-lg) 0;
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-xl);
    box-shadow: var(--shadow-md);
}

.admin-header h1 {
    text-align: center;
    font-size: var(--font-size-3xl);
    margin-bottom: var(--space-sm);
    font-weight: 800;
}

.admin-nav-tabs {
    display: flex;
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: 0;
    margin-bottom: var(--space-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.admin-nav-tab {
    flex: 1;
    text-align: center;
    padding: var(--space-md);
    cursor: pointer;
    border: none;
    background: none;
    font-size: var(--font-size-md);
    transition: all 0.3s ease;
    font-weight: 600;
}

.admin-nav-tab.active {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--text-light);
}

.admin-tab-content {
    display: none;
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-md);
    animation: fadeIn 0.5s ease;
}

.admin-tab-content.active {
    display: block;
}

.admin-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.admin-stat-card {
    background: var(--bg-primary);
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

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

.admin-stat-number {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: var(--space-sm);
}

.admin-stat-label {
    color: var(--text-secondary);
    font-size: var(--font-size-md);
}

.admin-list {
    max-height: 500px;
    overflow-y: auto;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.admin-list-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md);
    border-bottom: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.admin-list-item:hover {
    background: var(--bg-secondary);
}

.admin-list-item:last-child {
    border-bottom: none;
}

.admin-item-info {
    flex: 1;
}

.admin-item-actions {
    display: flex;
    gap: var(--space-sm);
}

.admin-search-box {
    margin-bottom: var(--space-lg);
}

.admin-search-box input {
    width: 100%;
    padding: var(--space-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: var(--font-size-md);
    transition: all 0.3s ease;
}

.admin-search-box input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
}

.role-badge {
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
}

.role-admin {
    background: var(--error-color);
    color: var(--text-light);
}

.role-super-admin {
    background: #9b59b6;
    color: var(--text-light);
}

.role-user {
    background: var(--info-color);
    color: var(--text-light);
}

.role-editor {
    background: var(--success-color);
    color: var(--text-light);
}

/* ===== 登录/注册页面样式 ===== */
.auth-body {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: gradientShift 8s ease infinite;
}

.auth-container {
    background: var(--bg-primary);
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 420px;
    animation: slideUp 0.8s ease-out;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.auth-container h1 {
    text-align: center;
    color: var(--text-primary);
    margin-bottom: var(--space-xl);
    font-size: var(--font-size-2xl);
    font-weight: 700;
}

.auth-form-group {
    margin-bottom: var(--space-lg);
}

.auth-form-group label {
    display: block;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
    font-weight: 600;
    font-size: var(--font-size-md);
}

.auth-form-group input[type="text"],
.auth-form-group input[type="email"],
.auth-form-group input[type="password"] {
    width: 100%;
    padding: var(--space-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: var(--font-size-md);
    transition: all 0.3s ease;
    background: var(--bg-primary);
}

.auth-form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
}

.auth-link {
    text-align: center;
    margin-top: var(--space-lg);
    color: var(--text-secondary);
}

.auth-link a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
}

.auth-link a:hover {
    color: var(--secondary-color);
    text-decoration: underline;
}

.flash-messages {
    margin-bottom: var(--space-lg);
}

.flash-message {
    padding: var(--space-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-sm);
    border-left: 4px solid;
    font-weight: 500;
}

.flash-success {
    background: rgba(39, 174, 96, 0.1);
    border-color: var(--success-color);
    color: var(--success-color);
}

.flash-error {
    background: rgba(231, 76, 60, 0.1);
    border-color: var(--error-color);
    color: var(--error-color);
}

/* ===== 响应式设计 - 管理员和认证页面 ===== */
@media (max-width: 768px) {
    .admin-nav-tabs {
        flex-direction: column;
    }
    
    .admin-nav-tab {
        padding: var(--space-md);
    }
    
    .admin-stats-grid {
        grid-template-columns: 1fr;
    }
    
    .auth-container {
        margin: var(--space-md);
        padding: var(--space-lg);
    }
    
    .auth-container h1 {
        font-size: var(--font-size-xl);
        margin-bottom: var(--space-lg);
    }
}

@media (max-width: 480px) {
    .auth-container {
        margin: var(--space-sm);
        padding: var(--space-md);
    }
    
    .auth-container h1 {
        font-size: var(--font-size-lg);
    }
    
    .admin-header h1 {
        font-size: var(--font-size-2xl);
    }
}

/* ===== 现代化组件样式 ===== */

/* 背景装饰元素 */
.background-decoration {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
}

.bg-circle {
    position: absolute;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(67, 97, 238, 0.1) 0%, transparent 70%);
    animation: float 6s ease-in-out infinite;
}

.circle-1 {
    width: 300px;
    height: 300px;
    top: 10%;
    left: 5%;
    animation-delay: 0s;
}

.circle-2 {
    width: 200px;
    height: 200px;
    top: 60%;
    right: 10%;
    animation-delay: 2s;
}

.circle-3 {
    width: 150px;
    height: 150px;
    bottom: 20%;
    left: 15%;
    animation-delay: 4s;
}

.bg-blur {
    position: absolute;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(114, 9, 183, 0.05) 0%, transparent 70%);
    filter: blur(40px);
    animation: pulse 8s ease-in-out infinite;
}

.blur-1 {
    top: -100px;
    right: -100px;
}

.blur-2 {
    bottom: -100px;
    left: -100px;
    animation-delay: 4s;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) scale(1); }
    50% { transform: translateY(-20px) scale(1.05); }
}

@keyframes pulse {
    0%, 100% { opacity: 0.3; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(1.1); }
}

/* 顶部导航栏 */
.header {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-xl);
    padding: var(--space-md);
    margin-bottom: var(--space-xl);
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: var(--shadow-sm);
}

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

.logo-section {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
}

.logo-icon {
    font-size: var(--font-size-3xl);
    animation: bounce 2s ease-in-out infinite;
}

.tagline {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    font-weight: 400;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-5px); }
    60% { transform: translateY(-3px); }
}

/* 用户状态样式 */
.user-info {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.user-avatar {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    color: white;
    font-size: var(--font-size-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

.user-avatar:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

.user-details {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.user-name {
    font-weight: 600;
    color: var(--text-primary);
}

.user-role {
    font-size: var(--font-size-xs);
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.user-role.super_admin { background: #9b59b6; color: white; }
.user-role.admin { background: #e74c3c; color: white; }
.user-role.editor { background: #27ae60; color: white; }
.user-role.guest { background: #95a5a6; color: white; }
.user-role.user { background: #3498db; color: white; }

.user-actions {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.action-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: var(--radius-lg);
    text-decoration: none;
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: var(--transition-normal);
    border: none;
    cursor: pointer;
}

.profile-btn { background: var(--bg-tertiary); color: var(--text-primary); }
.admin-btn { background: linear-gradient(135deg, #f39c12 0%, #e67e22 100%); color: white; }
.logout-btn { background: linear-gradient(135deg, #e74c3c 0%, #c0392b 100%); color: white; }

.action-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.auth-buttons {
    display: flex;
    gap: var(--space-sm);
}

.auth-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 12px 24px;
    border-radius: var(--radius-lg);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-normal);
}

.login-btn { 
    background: var(--bg-tertiary); 
    color: var(--text-primary); 
}

.register-btn { 
    background: linear-gradient(135deg, #27ae60 0%, #2ecc71 100%); 
    color: white; 
}

.auth-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ===== 个人资料页面样式 ===== */
.profile-card {
    background: linear-gradient(145deg, 
        rgba(255, 255, 255, 0.98) 0%, 
        rgba(248, 250, 252, 0.95) 50%, 
        rgba(255, 255, 255, 0.98) 100%);
    backdrop-filter: blur(20px) saturate(180%);
    border-radius: var(--radius-2xl);
    padding: var(--space-2xl);
    box-shadow: 
        0 25px 50px rgba(67, 97, 238, 0.1),
        0 10px 20px rgba(0, 0, 0, 0.05),
        inset 0 1px 0 rgba(255, 255, 255, 0.6),
        0 0 0 1px rgba(255, 255, 255, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.7);
    margin-bottom: var(--space-2xl);
    transition: all var(--transition-normal);
}

.profile-card:hover {
    transform: translateY(-4px);
    box-shadow: 
        0 35px 70px rgba(67, 97, 238, 0.15),
        0 15px 30px rgba(0, 0, 0, 0.08),
        inset 0 1px 0 rgba(255, 255, 255, 0.8),
        0 0 0 1px rgba(255, 255, 255, 0.5);
}

.profile-header {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
    padding-bottom: var(--space-lg);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.profile-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    font-size: var(--font-size-3xl);
    font-weight: 700;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-normal);
}

.profile-avatar:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-xl);
}

.profile-name {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
}

.profile-role {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: var(--gradient-secondary);
    color: var(--text-light);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: var(--shadow-sm);
}

.profile-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.info-card {
    background: var(--bg-secondary);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.info-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.info-card h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-md);
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: var(--space-sm);
}

.info-card p {
    margin-bottom: var(--space-sm);
    color: var(--text-secondary);
    line-height: 1.5;
}

.info-card strong {
    color: var(--text-primary);
    font-weight: 600;
}

.actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

.actions .btn {
    padding: var(--space-md) var(--space-xl);
    font-size: var(--font-size-md);
    font-weight: 600;
    border-radius: var(--radius-lg);
    text-decoration: none;
    transition: all var(--transition-normal);
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 140px;
}

.actions .btn-primary {
    background: var(--gradient-primary);
    color: var(--text-light);
    box-shadow: var(--shadow-sm);
}

.actions .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    background: var(--gradient-secondary);
}

.actions .btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.actions .btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
    border-color: var(--primary-color);
    background: var(--bg-secondary);
}

.news-section {
    margin-top: var(--space-2xl);
}

.news-section h2 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-lg);
    text-align: center;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--space-lg);
}

.news-card {
    background: var(--bg-secondary);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.news-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.news-card h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
    line-height: 1.3;
}

.news-card p {
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: var(--space-md);
}

.news-meta {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.news-actions {
    display: flex;
    gap: var(--space-sm);
}

.news-actions .btn {
    padding: var(--space-sm) var(--space-md);
    font-size: var(--font-size-sm);
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: all var(--transition-normal);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .profile-header {
        flex-direction: column;
        text-align: center;
        gap: var(--space-md);
    }
    
    .profile-info {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .actions {
        flex-direction: column;
        align-items: center;
    }
    
    .actions .btn {
        width: 100%;
        max-width: 300px;
    }
    
    .news-grid {
        grid-template-columns: 1fr;
    }
}

/* 主标题区域 */
.hero-section {
    text-align: center;
    margin-bottom: var(--space-2xl);
    padding: var(--space-xl) 0;
}

.main-title {
    margin-bottom: var(--space-md);
}

.title-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: var(--font-size-5xl);
    font-weight: 800;
    display: block;
    margin-bottom: var(--space-sm);
}

.title-subtitle {
    font-size: var(--font-size-xl);
    color: var(--text-muted);
    font-weight: 400;
    display: block;
}

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

/* 功能导航区域 */
.navigation-section {
    margin-bottom: var(--space-2xl);
}

.search-section {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
    flex-wrap: wrap;
}

.search-form {
    flex: 1;
    min-width: 300px;
}

.search-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    padding: 4px;
    border: 2px solid transparent;
    transition: var(--transition-normal);
}

.search-input-wrapper.focused {
    border-color: var(--primary-color);
    background: white;
    box-shadow: var(--shadow-md);
}

.search-icon {
    padding: 0 var(--space-sm);
    font-size: var(--font-size-lg);
    color: var(--text-muted);
}

.search-input {
    flex: 1;
    border: none;
    background: transparent;
    padding: var(--space-sm);
    font-size: var(--font-size-md);
    outline: none;
    color: var(--text-primary);
}

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

.search-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: var(--space-sm) var(--space-lg);
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: var(--radius-lg);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-normal);
}

.search-btn:hover {
    transform: translateX(2px);
    box-shadow: var(--shadow-md);
}

.quick-actions {
    display: flex;
    gap: var(--space-sm);
}

.quick-action-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-tertiary);
    border: none;
    border-radius: var(--radius-lg);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-normal);
    text-decoration: none;
    color: var(--text-primary);
}

.add-news-btn {
    background: linear-gradient(135deg, #27ae60 0%, #2ecc71 100%);
    color: white;
}

.quick-action-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* 导航标签 */
.nav-tabs {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    padding: var(--space-sm);
}

.nav-tabs-container {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.nav-tab {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-lg);
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition-normal);
    border: none;
    background: transparent;
    cursor: pointer;
}

.nav-tab.active {
    background: white;
    color: var(--text-primary);
    box-shadow: var(--shadow-sm);
}

.nav-tab:hover:not(.active) {
    background: rgba(255, 255, 255, 0.5);
    color: var(--text-primary);
}

.tab-badge {
    background: var(--primary-color);
    color: white;
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
}

/* 分类菜单 */
.category-dropdown {
    position: relative;
}

.category-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    padding: var(--space-md);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition-normal);
    margin-top: var(--space-sm);
}

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

.category-menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--border-color);
}

.category-menu-header h3 {
    margin: 0;
    font-size: var(--font-size-lg);
    font-weight: 600;
}

.close-menu {
    background: none;
    border: none;
    font-size: var(--font-size-xl);
    cursor: pointer;
    color: var(--text-muted);
    padding: 4px;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.close-menu:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--space-sm);
}

.category-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    border-radius: var(--radius-lg);
    text-decoration: none;
    color: var(--text-primary);
    transition: var(--transition-normal);
    border: 1px solid var(--border-color);
}

.category-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.category-card.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.category-icon-wrapper {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    background: var(--category-color, var(--bg-tertiary));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
}

.category-card.active .category-icon-wrapper {
    background: rgba(255, 255, 255, 0.2);
}

.category-name {
    font-weight: 500;
    font-size: var(--font-size-sm);
}

.category-arrow {
    opacity: 0;
    transition: var(--transition-fast);
}

.category-card:hover .category-arrow {
    opacity: 1;
}

/* 新闻区域 */
.news-section {
    margin-bottom: var(--space-2xl);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-lg);
    flex-wrap: wrap;
    gap: var(--space-md);
}

.section-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.section-stats {
    display: flex;
    gap: var(--space-lg);
}

.stats-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.stats-number {
    font-weight: 600;
    color: var(--text-primary);
}

/* 新闻网格 */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.news-card {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--space-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.news-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-normal);
}

.news-card:hover::before {
    left: 0;
}

.news-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-md);
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.news-category {
    flex-shrink: 0;
}

.category-badge {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 500;
}

.news-meta {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

.news-card-body {
    margin-bottom: var(--space-lg);
}

.news-title {
    margin: 0 0 var(--space-sm) 0;
    font-size: var(--font-size-lg);
    font-weight: 600;
    line-height: 1.4;
}

.news-title-link {
    text-decoration: none;
    color: var(--text-primary);
    transition: var(--transition-fast);
}

.news-title-link:hover {
    color: var(--primary-color);
}

.news-summary {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.5;
    margin: 0;
}

.news-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.news-actions {
    display: flex;
    gap: var(--space-sm);
}

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

.share-btn {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.news-stats {
    display: flex;
    gap: var(--space-md);
}

.stats-item {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

.stats-count {
    font-weight: 600;
    color: var(--text-primary);
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: var(--space-2xl);
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    border: 2px dashed var(--border-color);
}

.empty-icon {
    font-size: 64px;
    margin-bottom: var(--space-md);
    opacity: 0.5;
}

.empty-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.empty-description {
    color: var(--text-muted);
    margin-bottom: var(--space-lg);
}

.empty-action {
    display: inline-block;
    padding: var(--space-sm) var(--space-lg);
    background: var(--gradient-primary);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-lg);
    font-weight: 500;
    transition: var(--transition-normal);
}

.empty-action:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* 分页导航 */
.pagination-section {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
    padding: var(--space-lg) 0;
    border-top: 1px solid var(--border-color);
}

.pagination-info {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.current-page, .total-pages {
    font-weight: 600;
    color: var(--text-primary);
}

.pagination-controls {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.pagination-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-lg);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-normal);
    border: 1px solid var(--border-color);
    background: white;
    color: var(--text-primary);
}

.pagination-btn:not(.disabled):hover {
    background: var(--gradient-primary);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.pagination-btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.pagination-pages {
    display: flex;
    gap: var(--space-sm);
}

.pagination-page {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-lg);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-fast);
    border: 1px solid var(--border-color);
    background: white;
    color: var(--text-primary);
}

.pagination-page.current {
    background: var(--gradient-primary);
    color: white;
    border-color: var(--primary-color);
}

.pagination-page:not(.current):hover {
    background: var(--bg-tertiary);
    border-color: var(--border-hover);
}

/* 响应式设计 - 现代化组件 */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        align-items: stretch;
        gap: var(--space-md);
    }
    
    .logo-section {
        justify-content: center;
        text-align: center;
    }
    
    .user-info {
        justify-content: center;
    }
    
    .search-section {
        flex-direction: column;
        align-items: stretch;
    }
    
    .search-form {
        min-width: auto;
    }
    
    .quick-actions {
        justify-content: center;
    }
    
    .nav-tabs-container {
        justify-content: center;
    }
    
    .news-grid {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .news-card {
        padding: var(--space-md);
    }
    
    .news-card-header,
    .news-card-footer {
        flex-direction: column;
        align-items: stretch;
        gap: var(--space-sm);
    }
    
    .pagination-section {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .pagination-controls {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .pagination-pages {
        order: -1;
        width: 100%;
        justify-content: center;
        margin-bottom: var(--space-md);
    }
    
    .title-gradient {
        font-size: var(--font-size-4xl);
    }
    
    .hero-description {
        font-size: var(--font-size-md);
    }
}

@media (max-width: 480px) {
    .news-grid {
        grid-template-columns: 1fr;
        gap: var(--space-sm);
    }
    
    .category-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .user-actions {
        justify-content: center;
    }
    
    .auth-buttons {
        flex-direction: column;
        align-items: stretch;
    }
}

/* ===== 现代化响应式设计优化 ===== */
@media (max-width: 1400px) {
    .container {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 var(--space-xl);
    }
    
    .news-grid {
        grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
        gap: var(--space-2xl);
    }
    
    .navigation-section {
        flex-wrap: wrap;
        gap: var(--space-lg);
    }
}

@media (max-width: 1200px) {
    .container {
        max-width: 1000px;
        padding: 0 var(--space-lg);
    }
    
    .news-grid {
        grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
        gap: var(--space-xl);
    }
    
    .hero-section {
        padding: var(--space-4xl) 0;
    }
    
    h1 {
        font-size: 3.5rem;
    }
    
    .nav-tabs-container {
        gap: var(--space-md);
    }
}

@media (max-width: 992px) {
    .container {
        max-width: 900px;
        padding: 0 var(--space-md);
    }
    
    .news-grid {
        grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
        gap: var(--space-lg);
    }
    
    .header {
        padding: var(--space-xl) 0;
    }
    
    .hero-section {
        padding: var(--space-3xl) 0;
    }
    
    h1 {
        font-size: 3rem;
        margin-bottom: var(--space-lg);
    }
    
    .navigation-section {
        flex-direction: column;
        gap: var(--space-lg);
    }
    
    .search-section {
        width: 100%;
        max-width: 500px;
    }
    
    .quick-actions {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .container {
        max-width: 100%;
        padding: 0 var(--space-md);
        border-radius: 24px;
        margin: var(--space-md);
    }
    
    .news-grid {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
    
    .header {
        padding: var(--space-lg) 0;
    }
    
    .hero-section {
        padding: var(--space-2xl) 0;
    }
    
    h1 {
        font-size: 2.5rem;
        margin-bottom: var(--space-md);
    }
    
    .nav-tabs-container {
        flex-direction: column;
        gap: var(--space-sm);
    }
    
    .nav-tab {
        width: 100%;
        justify-content: center;
        padding: var(--space-md) var(--space-lg);
    }
    
    .category-grid {
        grid-template-columns: 1fr;
    }
    
    .category-menu {
        min-width: 280px;
        left: 50%;
        transform: translateX(-50%) translateY(-20px) scale(0.95);
    }
    
    .category-menu.show {
        transform: translateX(-50%) translateY(0) scale(1);
    }
}

@media (max-width: 576px) {
    .container {
        padding: 0 var(--space-sm);
        margin: var(--space-sm);
        border-radius: 20px;
    }
    
    .header {
        padding: var(--space-md) 0;
    }
    
    .hero-section {
        padding: var(--space-xl) 0;
    }
    
    h1 {
        font-size: 2rem;
        margin-bottom: var(--space-sm);
    }
    
    .btn {
        padding: var(--space-md) var(--space-lg);
        min-height: 52px;
        font-size: var(--font-size-sm);
    }
    
    .btn-lg {
        padding: var(--space-lg) var(--space-xl);
        min-height: 60px;
        font-size: var(--font-size-md);
    }
    
    .btn-sm {
        padding: var(--space-sm) var(--space-md);
        min-height: 40px;
        font-size: var(--font-size-xs);
    }
    
    .news-card {
        padding: var(--space-xl);
    }
    
    .nav-tab {
        padding: var(--space-sm) var(--space-md);
        font-size: var(--font-size-sm);
    }
    
    .search-input-wrapper {
        padding: var(--space-sm);
    }
    
    .search-input {
        font-size: var(--font-size-sm);
    }
}

@media (max-width: 400px) {
    .container {
        padding: 0 var(--space-xs);
        margin: var(--space-xs);
        border-radius: 16px;
    }
    
    h1 {
        font-size: 1.75rem;
    }
    
    .btn {
        padding: var(--space-sm) var(--space-md);
        min-height: 48px;
        font-size: var(--font-size-xs);
    }
    
    .news-card {
        padding: var(--space-lg);
    }
    
    .nav-tab {
        padding: var(--space-xs) var(--space-sm);
        font-size: var(--font-size-xs);
    }
}

/* ===== 硬币兑换功能样式 ===== */
.exchange-section {
    background: linear-gradient(145deg, 
        rgba(255, 255, 255, 0.95) 0%, 
        rgba(248, 250, 252, 0.98) 100%);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-2xl);
    padding: var(--space-xl);
    margin: var(--space-xl) 0;
    border: 1px solid rgba(255, 255, 255, 0.7);
    box-shadow: 
        0 8px 32px rgba(0, 0, 0, 0.08),
        inset 0 1px 0 rgba(255, 255, 255, 0.6);
}

.exchange-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.exchange-icon {
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--font-size-xl);
    font-weight: 600;
}

.exchange-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.exchange-info {
    background: rgba(67, 97, 238, 0.05);
    border: 1px solid rgba(67, 97, 238, 0.2);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    margin-bottom: var(--space-xl);
    text-align: center;
}

.exchange-ratio {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: var(--space-sm);
}

.exchange-description {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.5;
}

.exchange-form {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: var(--space-md);
    align-items: end;
}

.exchange-input-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.exchange-label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: var(--font-size-sm);
}

.exchange-input {
    padding: var(--space-md) var(--space-lg);
    border: 2px solid rgba(67, 97, 238, 0.2);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-md);
    background: rgba(255, 255, 255, 0.9);
    transition: all 0.3s ease;
    min-width: 200px;
}

.exchange-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.1);
    background: rgba(255, 255, 255, 1);
}

.exchange-input:invalid {
    border-color: var(--error-color);
}

.exchange-btn {
    background: var(--gradient-primary);
    color: white;
    border: none;
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-md);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    min-height: 56px;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.exchange-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(67, 97, 238, 0.3);
}

.exchange-btn:active {
    transform: translateY(0);
}

.exchange-btn:disabled {
    background: var(--text-muted);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.exchange-result {
    margin-top: var(--space-lg);
    min-height: 60px;
}

.alert {
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-lg);
    font-weight: 500;
    border-left: 4px solid;
}

.alert-success {
    background: rgba(34, 197, 94, 0.1);
    color: var(--success-color);
    border-left-color: var(--success-color);
}

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    color: var(--error-color);
    border-left-color: var(--error-color);
}

/* 移动端响应式 */
@media (max-width: 768px) {
    .exchange-section {
        padding: var(--space-lg);
        margin: var(--space-lg) 0;
    }
    
    .exchange-form {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .exchange-input {
        min-width: auto;
    }
    
    .exchange-btn {
        justify-content: center;
    }
}

/* ===== 点赞和投币功能样式 ===== */
.news-interactions {
    margin: var(--space-lg) 0;
    padding: var(--space-md);
    background: linear-gradient(145deg, 
        rgba(255, 255, 255, 0.8) 0%, 
        rgba(248, 250, 252, 0.9) 100%);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(10px);
}

.interaction-stats {
    display: flex;
    gap: var(--space-xl);
    align-items: center;
    justify-content: center;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
}

.stat-icon {
    font-size: var(--font-size-2xl);
    transition: transform 0.3s ease;
}

.stat-count {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
}

.total-coins {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    font-weight: 500;
}

.news-actions {
    display: flex;
    gap: var(--space-md);
    align-items: center;
    justify-content: center;
    margin: var(--space-lg) 0;
    flex-wrap: wrap;
}

.btn-like, .btn-coin {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: var(--font-size-md);
    transition: all 0.3s ease;
    border: 2px solid transparent;
    cursor: pointer;
    min-width: 120px;
    justify-content: center;
}

.btn-like {
    background: linear-gradient(145deg, 
        rgba(239, 68, 68, 0.1) 0%, 
        rgba(239, 68, 68, 0.2) 100%);
    color: var(--error-color);
    border-color: rgba(239, 68, 68, 0.3);
}

.btn-like:hover {
    background: linear-gradient(145deg, 
        rgba(239, 68, 68, 0.2) 0%, 
        rgba(239, 68, 68, 0.3) 100%);
    border-color: rgba(239, 68, 68, 0.5);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(239, 68, 68, 0.2);
}

.btn-like.liked {
    background: linear-gradient(145deg, 
        rgba(239, 68, 68, 0.3) 0%, 
        rgba(239, 68, 68, 0.4) 100%);
    color: white;
    border-color: rgba(239, 68, 68, 0.6);
}

.btn-coin {
    background: linear-gradient(145deg, 
        rgba(245, 158, 11, 0.1) 0%, 
        rgba(245, 158, 11, 0.2) 100%);
    color: var(--warning-color);
    border-color: rgba(245, 158, 11, 0.3);
}

.btn-coin:hover {
    background: linear-gradient(145deg, 
        rgba(245, 158, 11, 0.2) 0%, 
        rgba(245, 158, 11, 0.3) 100%);
    border-color: rgba(245, 158, 11, 0.5);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(245, 158, 11, 0.2);
}

.btn-coin.coined {
    background: linear-gradient(145deg, 
        rgba(245, 158, 11, 0.3) 0%, 
        rgba(245, 158, 11, 0.4) 100%);
    color: white;
    border-color: rgba(245, 158, 11, 0.6);
}

.btn-icon {
    font-size: var(--font-size-xl);
}

/* 投币模态框样式 */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.modal-content {
    background: linear-gradient(145deg, 
        rgba(255, 255, 255, 0.95) 0%, 
        rgba(248, 250, 252, 0.98) 100%);
    margin: 15% auto;
    padding: var(--space-xl);
    border-radius: var(--radius-2xl);
    width: 90%;
    max-width: 500px;
    box-shadow: var(--shadow-xl);
    border: 1px solid rgba(255, 255, 255, 0.8);
    position: relative;
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.close {
    position: absolute;
    right: var(--space-lg);
    top: var(--space-lg);
    font-size: var(--font-size-2xl);
    font-weight: bold;
    cursor: pointer;
    color: var(--text-muted);
    transition: color 0.3s ease;
}

.close:hover {
    color: var(--text-primary);
}

.coin-options {
    text-align: center;
}

.coin-options h3 {
    margin-bottom: var(--space-lg);
    color: var(--text-primary);
}

.coin-amounts {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
    margin: var(--space-lg) 0;
}

.coin-option {
    padding: var(--space-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
}

.coin-option:hover {
    border-color: var(--warning-color);
    background: rgba(245, 158, 11, 0.1);
}

.coin-option.selected {
    border-color: var(--warning-color);
    background: var(--warning-light);
    color: var(--warning-color);
}

.custom-coin {
    margin: var(--space-lg) 0;
    display: flex;
    gap: var(--space-sm);
    align-items: center;
    justify-content: center;
}

.custom-coin input {
    width: 100px;
    padding: var(--space-sm);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
}

.modal-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    margin-top: var(--space-xl);
}

/* 点赞和投币功能移动端响应式 */
@media (max-width: 768px) {
    .interaction-stats {
        flex-direction: column;
        gap: var(--space-md);
    }
    
    .news-actions {
        flex-direction: column;
        gap: var(--space-md);
    }
    
    .coin-amounts {
        grid-template-columns: 1fr;
    }
    
    .custom-coin {
        flex-direction: column;
    }
    
    .modal-content {
        margin: 10% auto;
        padding: var(--space-lg);
        width: 95%;
    }
}

/* ===== 推荐新闻板块样式 ===== */
.recommended-section {
    margin-bottom: var(--space-2xl);
    padding: 0 var(--space-lg);
}

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

.recommended-section .section-title {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    background: var(--gradient-secondary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: var(--space-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
}

.recommended-section .section-subtitle {
    color: var(--text-muted);
    font-size: var(--font-size-lg);
    font-weight: 500;
}

.recommended-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-2xl);
}

.recommended-card {
    background: linear-gradient(145deg, 
        rgba(255, 255, 255, 0.95) 0%, 
        rgba(248, 250, 252, 0.98) 50%, 
        rgba(255, 255, 255, 0.95) 100%);
    border-radius: 20px;
    padding: var(--space-lg);
    box-shadow: 
        0 15px 35px rgba(67, 97, 238, 0.1),
        0 6px 20px rgba(0, 0, 0, 0.05),
        inset 0 1px 0 rgba(255, 255, 255, 0.6),
        0 0 0 1px rgba(255, 255, 255, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.7);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(15px) saturate(150%);
    cursor: pointer;
    transform-style: preserve-3d;
    perspective: 1000px;
    /* 启用GPU加速 */
    transform: translateZ(0);
    will-change: transform, box-shadow;
}

.recommended-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, 
        rgba(67, 97, 238, 0.02) 0%, 
        rgba(102, 126, 234, 0.03) 50%, 
        rgba(67, 97, 238, 0.02) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 1;
}

.recommended-card:hover {
    transform: translate3d(0, -8px, 0) scale3d(1.02, 1.02, 1);
    box-shadow: 
        0 25px 50px rgba(67, 97, 238, 0.15),
        0 10px 25px rgba(0, 0, 0, 0.08),
        inset 0 1px 0 rgba(255, 255, 255, 0.8),
        0 0 0 1px rgba(255, 255, 255, 0.5);
    border-color: rgba(255, 255, 255, 0.9);
}

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

.recommended-card-content {
    position: relative;
    z-index: 3;
}

.recommended-category {
    display: inline-block;
    margin-bottom: var(--space-sm);
}

.recommended-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: color 0.3s ease;
}

.recommended-title-link {
    text-decoration: none;
    color: inherit;
    background: linear-gradient(120deg, transparent 0%, transparent 50%, var(--primary-color) 50%);
    background-size: 220% 100%;
    background-position: 100% 0;
    transition: all 0.4s ease;
    padding: 2px 0;
    border-radius: 4px;
}

.recommended-title-link:hover {
    background-position: 0 0;
    color: white;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.recommended-summary {
    color: var(--text-secondary);
    line-height: 1.5;
    font-size: var(--font-size-md);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: var(--space-sm);
}

.recommended-meta {
    display: flex;
    gap: var(--space-md);
    align-items: center;
    flex-wrap: wrap;
}

.recommended-meta .meta-item {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-muted);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.recommended-meta .meta-icon {
    font-size: var(--font-size-sm);
    opacity: 0.7;
}