* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: #fff;
}

/* Banner部分 */
.banner {
    width: 100%;
    height: 180px;
    background: url(banner-bg.png) no-repeat;
    display: flex;
    align-items: center;
    justify-content: center;
}

.banner-content {
    width: 1200px;
    color: white;
    text-align: left;
}

.banner-title {
    font-size: 30px;
    font-weight: bold;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.banner-description {
    font-size: 16px;
    line-height: 1.6;
    max-width: 800px;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.3);
}

/* 主体容器 */
.container {
    width: 1200px;
    margin: 136px auto;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
}

/* 每个小块的样式 */
.card {
    border-radius: 8px;
    padding: 30px 20px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
    cursor: pointer;
    color: white;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.15);
}

.card a:hover {
	color: #fff;
}

/* 单独设置每个卡片的背景色 */
.card:nth-child(1) {
    background-color: #4EBAB4;
}

.card:nth-child(2) {
    background-color: #0B76E0;
}

.card:nth-child(3) {
    background-color: #3499F8;
}

.card:nth-child(4) {
    background-color: #54A8F7;
}

/* Logo样式 */
.card-logo {
    width: 84px;
    height: 84px;
    margin: 0 auto 20px;
    background: rgba(255,255,255,0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 40px;
}

/* 标题样式 */
.card-title {
    height: 15px;
    font-size: 24px;
    margin-bottom: 50px;
    font-weight: 500;
}

/* 按钮样式 */
.card-button {
    display: inline-block;
    padding: 10px 20px;
    color: #fff;
    text-decoration: none;
    border-radius: 20px;
    font-size: 16px;
    font-weight: 400;
    transition: all 0.3s ease;
    background: #ffffff2e;
}

.card-button:hover {
    transform: scale(1.05);
}

/* 响应式设计 */
@media (max-width: 1250px) {
    .container {
        width: 100%;
        grid-template-columns: repeat(2, 1fr);
    }
    
    .banner-content {
        width: 100%;
        padding: 0 15px;
    }
}

@media (max-width: 768px) {
    .container {
        grid-template-columns: 1fr;
        margin: 40px auto;
    }
    
    .banner-title {
        font-size: 32px;
    }
    
    .banner-description {
        font-size: 16px;
    }
}