* {
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 自定义动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

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

/* 卡片悬停效果 */
.card-hover {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.card-hover:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.card-hover:active {
    transform: translateY(-2px);
    box-shadow: 0 10px 10px -5px rgba(0, 0, 0, 0.1), 0 5px 5px -5px rgba(0, 0, 0, 0.04);
}

/* 渐变背景 */
.gradient-blue {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.gradient-purple {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.gradient-green {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.gradient-orange {
    background: linear-gradient(339deg, #fbc2eb 0%, #a6c1ee 100%);
}

.gradient-rose {
    background: linear-gradient(135deg, #fb7185 0%, #f97316 100%);
}

/* 按钮样式增强 */
.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px -5px rgba(102, 126, 234, 0.4);
}

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

/* 列表项悬停效果 */
.list-item-hover {
    transition: all 0.2s ease;
}

.list-item-hover:hover {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

/* 标签样式 */
.tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

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

/* 输入框焦点样式增强 */
input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1), 0 0 0 1px rgba(102, 126, 234, 0.05);
}

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #a1a1a1;
}

/* 加载动画 */
.loading-spinner {
    border: 3px solid #f3f3f3;
    border-top-color: #3498db;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 0.8s linear infinite;
}

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

/* 淡入淡出动画 */
.fade-in {
    animation: fadeInUp 0.5s ease-out;
}

/* 阴影增强 */
.shadow-sm {
    box-shadow: 0 2px 4px 0 rgba(0, 0, 0, 0.06);
}

.shadow-md {
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.shadow-lg {
    shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -1px rgba(0, 0, 0, 0.06);
}

.shadow-xl {
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.06);
}

.shadow-2xl {
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.15), 0 12px 12px -6px rgba(0, 0, 0, 0.06);
}

/* 模糊效果 */
.backdrop-blur {
    backdrop-filter: blur(10px);
}

.backdrop-blur-sm {
    backdrop-filter: blur(5px);
}

.backdrop-blur-md {
    backdrop-filter: blur(15px);
}

/* 过渡效果 */
.transition-all {
    transition: all 0.3s ease;
}

.transition-transform {
    transition: transform 0.3s ease;
}

.transition-opacity {
    transition: opacity 0.3s ease;
}

.transition-colors {
    transition: color 0.3s ease, background-color 0.3s ease, border-color 0.3s ease;
}

/* 实用类 */
.text-shadow-sm {
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.text-shadow-md {
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.text-shadow-lg {
    text-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

/* 渐变文本 */
.text-gradient {
    background: linear-gradient(to right, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent;
}

.text-gradient-blue {
    background: linear-gradient(to right, #4facfe, #00f2fe);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent;
}

.text-gradient-purple {
    background: linear-gradient(to right, #f093fb, #f5576c);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent;
}

.text-gradient-orange {
    background: linear-gradient(to right, #fbc2eb, #a6c1ee);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-background-clip: text;
    color: transparent;
}