@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;700&display=swap');

body {
    font-family: 'Noto Sans SC', sans-serif;
    background-color: #f8fafc;
    color: #1e293b;
}

.gradient-bg {
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
}

.card-hover {
    transition: all 0.3s ease;
}

.card-hover:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px -5px rgba(59, 130, 246, 0.4);
}

.btn-primary {
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(59, 130, 246, 0.4);
}

.feature-icon {
    transition: all 0.3s ease;
}

.feature-card:hover .feature-icon {
    transform: scale(1.1);
    color: #3b82f6;
}

.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 50;
    background-color: #ffffff;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
}

.nav-btn {
    transition: all 0.3s ease;
}

.nav-btn:hover {
    background-color: #f1f5f9;
}

.nav-btn.active {
    color: #3b82f6;
    border-top: 3px solid #3b82f6;
}

/* 加载动画 */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.animate-pulse {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* 滚动动画 */
.scroll-reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease;
}

.scroll-reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* 套餐卡片样式 */
.package-card {
    border-radius: 16px;
    overflow: hidden;
    position: relative;
}

.package-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background-color: #ef4444;
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

/* 流量动画 */
@keyframes flow {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

.flow-bg {
    background: linear-gradient(-45deg, #3b82f6, #2563eb, #1d4ed8, #3b82f6);
    background-size: 400% 400%;
    animation: flow 15s ease infinite;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .hero-content {
        padding-top: 2rem;
        padding-bottom: 2rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
}