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

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

::-webkit-scrollbar-track {
    background: #1F2937;
}

::-webkit-scrollbar-thumb {
    background: #6366F1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #4F46E5;
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}

/* 加载动画 */
.loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #1F2937;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 5px solid #374151;
    border-top: 5px solid #6366F1;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* 导航栏样式 */
.navbar-scrolled {
    background: rgba(31, 41, 55, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

/* 文本选择样式 */
::selection {
    background: rgba(99, 102, 241, 0.3);
    color: #FFFFFF;
}

/* 表单样式 */
input:focus, textarea:focus, select:focus {
    outline: none;
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.5);
}

/* 按钮样式 */
.btn {
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
    z-index: -1;
}

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

/* 卡片悬停效果 */
.card-hover {
    position: relative;
    overflow: hidden;
}

.card-hover::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(236, 72, 153, 0.1));
    opacity: 0;
    transition: opacity 0.3s;
    z-index: 1;
}

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

/* 3D 视差效果 */
.parallax-element {
    transform-style: preserve-3d;
    perspective: 1000px;
}

.parallax-element:hover {
    transform: translateZ(20px);
}

/* 渐变文字 */
.text-gradient {
    background: linear-gradient(135deg, #6366F1, #EC4899);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 玻璃拟态效果 */
.glass-effect {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* 动画延迟类 */
.delay-100 { animation-delay: 0.1s; }
.delay-200 { animation-delay: 0.2s; }
.delay-300 { animation-delay: 0.3s; }
.delay-400 { animation-delay: 0.4s; }
.delay-500 { animation-delay: 0.5s; }

/* 响应式调整 */
@media (max-width: 768px) {
    .parallax-element:hover {
        transform: none;
    }
    
    .text-gradient {
        background: linear-gradient(135deg, #6366F1, #EC4899);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }
}

/* 打印样式 */
@media print {
    .no-print {
        display: none !important;
    }
    
    body {
        background: white !important;
        color: black !important;
    }
}

/* 高对比度模式 */
@media (prefers-contrast: high) {
    .glass-effect {
        background: rgba(255, 255, 255, 0.2);
        border: 2px solid white;
    }
}

/* 减少动画模式 */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}