body {
    font-family: Arial, sans-serif;
    background-color: white;
    margin: 0;
    padding: 0;
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.header {
    background-color: #4a6cf7;
    padding: 0;
    text-align: left;
    height: 60px !important;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
    overflow: hidden;
}

.close-btn {
    position: absolute;
    right: 5px;
    top: 5px;
    cursor: pointer;
    padding: 5px;
    border: none;
    background: rgba(0, 0, 0, 0.5);
    color: white;
    font-size: 0.8em;
    transition: background-color 0.3s;
    z-index: 10;
    border-radius: 3px;
}

.close-btn:hover {
    background: rgba(0, 0, 0, 0.7);
}

.nav {
    background-color: #ffffff;
    overflow: hidden;
    text-align: left;
    padding-left: 10%;
    transition: all 0.3s ease;
}

.logo img {
    height: 30px;
    margin-right: 90px;
    float: left;
    padding: 13px 10px;
}

.nav a {
    float: left;
    display: block;
    color: #333;
    text-align: center;
    padding: 15px 23px;
    text-decoration: none;
    transition: background-color 0.3s;
}

.nav a:hover {
    background-color: #f0f0f0;
}

.nav-scrolled {
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

/* 广告容器样式 */
.adsbygoogle {
    width: 100% !important;
    height: 60px !important;
    margin: 0 !important;
}

/* 确保header高度固定 */
.header {
    height: 60px !important;
    overflow: hidden;  /* 防止广告溢出 */
}