@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: #333;
}

.hero-gradient {
    background: linear-gradient(135deg, #1e88e5 0%, #42a5f5 100%);
}

.card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.btn-primary {
    background: linear-gradient(135deg, #1e88e5 0%, #42a5f5 100%);
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #1565c0 0%, #1e88e5 100%);
    transform: translateY(-2px);
}

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

.feature-card:hover .feature-icon {
    transform: scale(1.1);
    color: #1e88e5;
}

.faq-item {
    transition: all 0.3s ease;
}

.faq-item:hover {
    background-color: #f1f5f9;
}

.footer-fixed {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 50;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
}

/* 骨架屏动画 */
@keyframes pulse {
    0% {
        background-color: rgba(229, 231, 235, 0.4);
    }
    50% {
        background-color: rgba(229, 231, 235, 0.7);
    }
    100% {
        background-color: rgba(229, 231, 235, 0.4);
    }
}

.skeleton {
    animation: pulse 1.5s infinite;
}

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

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #1e88e5;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #1565c0;
}

/* 响应式调整 */
@media (max-width: 640px) {
    .hero-content {
        padding-top: 2rem;
        padding-bottom: 2rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
}

/* 加载动画 */
.loader {
    border: 3px solid #f3f3f3;
    border-top: 3px solid #1e88e5;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

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

/* 数字增长动画 */
.counter {
    transition: all 0.5s ease;
}

/* 导航菜单激活状态 */
.nav-item.active {
    color: #1e88e5;
    font-weight: 500;
    border-bottom: 2px solid #1e88e5;
}