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

body {
    font-family: 'Microsoft YaHei', sans-serif;
    background-color: #f5f5f5;     
    color: #333;
}

/* 头部区域 */
.header {
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, #e6f2ff 0%, #ffffff 100%);
    position: relative;
    overflow: hidden;
}

.header img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.header-content {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    text-align: center;
    z-index: 1;
}

.header-title {
    font-size: 24px;
    font-weight: bold;
    color: #333;
    margin-bottom: 10px;
}

/* 主要内容区域 */
.main-content {
    padding: 10px;
    background-color: white;
}

.icon-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr); /* 修改为4列 */
    gap: 10px;
    margin-bottom: 10px;
}
.icon-grid a {
    text-decoration: none;
    color: inherit;
}
.icon-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 10px;
    border-radius: 12px;
    background-color: #f9f9f9;
    transition: transform 0.3s ease;
}

.icon-item:hover {
    transform: translateY(-5px);
}

.icon-item img {
    width: 60px;
    height: 60px;
    margin-bottom: 5px;
}

.icon-text {
    font-size: 15px;
    text-align: center;
}

/* 底部导航栏 */
.footer-nav {
    display: flex;
    justify-content: space-around;
    background-color: white;
    padding: 15px 0;
    box-shadow: 0 -2px 10px rgba(0,0,0,0.1);
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 100;
}

.footer-nav a {
    text-decoration: none;
    color: inherit;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 5px;
}

.nav-item.active {
    color: #007AFF;
}

.nav-icon {
    width: 24px;
    height: 24px;
    margin-bottom: 5px;
}

.nav-text {
    font-size: 14px;
}