/* 科技感主题变量 */
:root {
    --primary: #00f0ff;
    --secondary: #ff4dff;
    --accent: #00ff9d;
    --dark: #0a0a1a;
    --light: #e0e0ff;
}

/* 基础样式 */
body {
    background-color: var(--dark);
    color: var(--light);
    font-family: 'Roboto', sans-serif;
    overflow-x: hidden;
}

/* 科技感字体 */
.tech-font {
    font-family: 'Orbitron', sans-serif;
    letter-spacing: 1px;
}

/* 3D卡片效果 */
.tech-card {
    background: rgba(15, 15, 35, 0.7);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(0, 240, 255, 0.2);
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
    transform-style: preserve-3d;
}

.tech-card:hover {
    transform: translateY(-5px) rotateX(5deg);
    box-shadow: 0 12px 40px rgba(0, 240, 255, 0.2);
    border-color: var(--primary);
}

/* 霓虹效果 */
.neon-text {
    text-shadow: 0 0 5px var(--primary), 
                 0 0 10px var(--primary),
                 0 0 20px var(--primary);
}

.neon-accent {
    text-shadow: 0 0 5px var(--accent),
                 0 0 10px var(--accent);
}

/* 机械感装饰元素 */
.gear-icon {
    animation: spin 8s linear infinite;
}

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

/* 科技感按钮 */
.tech-btn {
    background: linear-gradient(45deg, var(--primary), var(--accent));
    border: none;
    color: var(--dark);
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 12px 24px;
    border-radius: 50px;
    position: relative;
    overflow: hidden;
    z-index: 1;
    transition: all 0.3s ease;
}

.tech-btn:hover::before {
    opacity: 1;
}

.tech-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, var(--accent), var(--primary));
    z-index: -1;
    opacity: 0;
    transition: opacity 0.3s;
}

/* Mobile First Styles */
@media (max-width: 640px) {
    .tech-btn {
        padding: 10px 16px;
        font-size: 14px;
    }
}

/* Tablet Styles */
@media (min-width: 641px) and (max-width: 1023px) {
    .tech-btn {
        padding: 12px 20px;
    }
}

/* Desktop Styles */
@media (min-width: 1024px) {
    .tech-btn {
        padding: 12px 24px;
    }
}

/* 响应式调整 */
@media (max-width: 768px) {
    .tech-card {
        backdrop-filter: none;
    }
}

/* 确保动画在移动设备上流畅 */
@media (hover: none) {
    .tech-card:hover {
        transform: none;
    }
}