.sidebar-search {
    padding: 20px 15px;
    margin-top: 25px;
    margin-left: -30px !important; 
    padding-left: 30px !important; 
    background-color: transparent;
    position: sticky;
    top: 0;
    z-index: 10;
    position: relative;
}

.sidebar-search-input {
    width: 100%;
    padding: 8px 16px 8px 35px; 
    border: none;
    border-bottom: 1px solid #e0e0e0;
    border-radius: 0;
    font-size: 14px;
    outline: none;
    transition: border-bottom-color 0.3s ease;
    background-color: transparent;
    box-shadow: none;
}

.sidebar-search-input:focus {
    border-bottom-color: #1890ff;
    box-shadow: none;
}

.sidebar-search-input::placeholder {
    color: #9aa0a6;
    font-size: 14px;
}


.sidebar-search::before {
    content: "";
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%239aa0a6' viewBox='0 0 16 16'%3E%3Cpath d='M11.742 10.344a6.5 6.5 0 1 0-1.397 1.398h-.001c.03.04.062.078.098.115l3.85 3.85a1 1 0 0 0 1.415-1.414l-3.85-3.85a1.007 1.007 0 0 0-.115-.1zM12 6.5a5.5 5.5 0 1 1-11 0 5.5 5.5 0 0 1 11 0z'/%3E%3C/svg%3E");
    position: absolute;
    left: 45px;
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    pointer-events: none;
    z-index: 1;
}


.search-clear {
    position: absolute;
    right: 25px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: #9aa0a6;
    cursor: pointer;
    font-size: 18px;
    padding: 4px;
    display: none;
    border-radius: 50%;
    transition: color 0.3s ease;
}

.search-clear:hover {
    color: #5f6368;
}

.sidebar-search {
    position: relative;
}


.md-nav__item.hidden {
    display: none !important;
}

.md-nav__link .search-highlight {
    color: inherit !important; 
    font-weight: inherit;
    background-color: rgba(255, 229, 100, 0.5);
    padding: 0 !important;
    margin: 0 !important;
    border-radius: 2px;
}


.no-results {
    padding: 20px 15px;
    text-align: center;
    color: #9aa0a6;
    font-style: italic;
    font-size: 14px;
}


.sidebar-search-input:hover {
    border-bottom-color: #bbb;
}


.sidebar-search-input:focus::placeholder {
    opacity: 0.5;
}


.child-item-indicator {
    margin-left: 16px !important;
}


@media (prefers-color-scheme: dark) {
    .sidebar-search-input {
        border-bottom-color: #404040;
        color: #e0e0e0;
    }
    
    .sidebar-search-input:focus {
        border-bottom-color: #1890ff;
    }
    
    .sidebar-search-input::placeholder {
        color: #888;
    }
}

/* ==========================================================================
   在手机/平板模式下隐藏侧边栏的自定义搜索框
   ========================================================================== */
@media screen and (max-width: 1300px) {
    .sidebar-search {
        display: none !important;
    }
    
    /* 修正隐藏搜索框后，顶部可能过于拥挤的问题 */
    .md-sidebar--primary .md-sidebar__scrollwrap {
        padding-top: 10px !important;
    }
}