/* 全局样式 */
:root {
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
    --blur-amount: 10px;
    --transition-speed: 0.3s;
}

/* 背景效果 */
body {
    background-image: url('/images/bg.jpg');
    background-size: cover;
    background-attachment: fixed;
    background-position: center;
    min-height: 100vh;
    overflow-x: hidden;
}

/* 玻璃态效果 */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--blur-amount));
    border: 1px solid var(--glass-border);
    border-radius: 1rem;
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

/* 鼠标光晕效果 */
.cursor-glow {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, rgba(59, 130, 246, 0) 70%);
    border-radius: 50%;
    position: fixed;
    pointer-events: none;
    transform: translate(-50%, -50%);
    z-index: 0;
    transition: all 0.1s ease;
}

/* 3D卡片效果 */
.card-3d {
    transform-style: preserve-3d;
    perspective: 1000px;
}

.card-3d:hover {
    transform: scale(1.02) rotateX(var(--rotateX)) rotateY(var(--rotateY));
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
}

/* 图标动画 */
.icon-hover {
    transition: transform var(--transition-speed), filter var(--transition-speed);
}

.icon-hover:hover {
    transform: scale(1.1) rotate(5deg);
    filter: drop-shadow(0 0 8px rgba(59, 130, 246, 0.6));
}

/* 导航链接动画 */
.nav-link {
    position: relative;
    text-decoration: none;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, #3b82f6, #60a5fa);
    transition: width var(--transition-speed);
}

.nav-link:hover::after {
    width: 100%;
}

/* 滚动动画 */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity var(--transition-speed), transform var(--transition-speed);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 按钮和输入框效果 */
.interactive-element {
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.interactive-element:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.interactive-element:active {
    transform: translateY(0);
}

/* 响应式设计调整 */
@media (max-width: 768px) {
    :root {
        --blur-amount: 5px;
    }
    
    .glass {
        backdrop-filter: blur(5px);
    }
    
    .cursor-glow {
        display: none;
    }
}

/* 性能优化 */
@media (prefers-reduced-motion: reduce) {
    * {
        animation: none !important;
        transition: none !important;
    }
}