/* 整体头部固定，不再用sticky双层 */
.page-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background: #111;
}
.search-box {
    padding: 12px 16px;
    background: #222;
    border-radius: 999px;
    margin:10px;
    color:#aaa;
}
.nav-bar {
    display: flex;
    background: #111;
}
.nav-bar a {
    flex: 1;
    text-align: center;
    color: #bbb;
    text-decoration: none;
    padding: 12px 16px;
    font-size: 14px;
}
.nav-bar a.active {
    background: #4488ff;
    color: #fff;
}

/* 内容区：padding-top = 整个header总高度，非常关键！ */
.content-wrap {
    padding-top: 116px; /* 根据你header实际高度微调 */
}
/* 暂无连环画 垂直水平居中 */
.empty-wrap {
    min-height: calc(100vh - 116px);
    display:flex;
    align-items:center;
    justify-content:center;
    color:#aaa;
    font-size:18px;
}