/* 组件样式 */

/* 按钮组件 */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    text-align: center;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    border: 2px solid transparent;
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

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

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

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

.btn-secondary:hover {
    background: var(--bg-card-hover);
    border-color: var(--primary-color);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--primary-color);
}

.btn-outline:hover {
    background: var(--primary-color);
    box-shadow: var(--shadow-glow);
}

/* 功能卡片 */
.feature-card {
    background: var(--bg-card);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    text-align: center;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
    background: var(--bg-card-hover);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-icon {
    margin-bottom: var(--spacing-sm);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    animation: float 3s ease-in-out infinite;
    color: var(--primary-color);
}

.feature-icon svg {
    width: 80px;
    height: 80px;
    display: block;
    stroke: currentColor;
    fill: none;
    transition: all var(--transition-base);
}

.feature-card:hover .feature-icon svg {
    color: var(--primary-light);
    transform: scale(1.05);
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.feature-title {
    font-size: 1.3rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.feature-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* 平台卡片 */
.platform-card {
    background: var(--bg-card);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    text-align: center;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.platform-card::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(0, 102, 255, 0.1);
    transform: translate(-50%, -50%);
    transition: all var(--transition-slow);
}

.platform-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.platform-card:hover::after {
    width: 300px;
    height: 300px;
}

.platform-logo {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    position: relative;
    z-index: 1;
}

.platform-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    position: relative;
    z-index: 1;
}

/* 优势项 */
.advantage-item {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
    padding: var(--spacing-md);
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    transition: all var(--transition-base);
}

.advantage-item:hover {
    transform: translateX(10px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
    background: var(--bg-card-hover);
}

.advantage-number {
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    flex-shrink: 0;
    min-width: 60px;
}

.advantage-text h3 {
    font-size: 1.3rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.advantage-text p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* 加载动画 */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* 滚动动画 */
@media (prefers-reduced-motion: no-preference) {
    .feature-card,
    .platform-card,
    .advantage-item {
        animation: fadeIn 0.6s ease both;
    }
    
    .feature-card:nth-child(1) { animation-delay: 0.1s; }
    .feature-card:nth-child(2) { animation-delay: 0.2s; }
    .feature-card:nth-child(3) { animation-delay: 0.3s; }
    .feature-card:nth-child(4) { animation-delay: 0.4s; }
    .feature-card:nth-child(5) { animation-delay: 0.5s; }
    .feature-card:nth-child(6) { animation-delay: 0.6s; }
    
    .platform-card:nth-child(1) { animation-delay: 0.1s; }
    .platform-card:nth-child(2) { animation-delay: 0.2s; }
    .platform-card:nth-child(3) { animation-delay: 0.3s; }
    .platform-card:nth-child(4) { animation-delay: 0.4s; }
    .platform-card:nth-child(5) { animation-delay: 0.5s; }
    
    .advantage-item:nth-child(1) { animation-delay: 0.1s; }
    .advantage-item:nth-child(2) { animation-delay: 0.2s; }
    .advantage-item:nth-child(3) { animation-delay: 0.3s; }
    .advantage-item:nth-child(4) { animation-delay: 0.4s; }
    .advantage-item:nth-child(5) { animation-delay: 0.5s; }
}