/* 一级菜单美化 */
#nav-menu ul {
    list-style: none;
    margin: 0;
    padding: 0;
    position: relative;
    display: flex;
    gap: 8px;
}

#nav-menu ul li {
    position: relative;
    font-size: 16px;
    font-weight: 500;
    transition: background 0.2s;
}

#nav-menu ul > li > a {
    display: block;
    padding: 0 26px;
    height: 40px;
    line-height: 40px;
    color: #444;
    border-radius: 6px 6px 0 0;
    transition: background 0.2s, color 0.2s;
}

#nav-menu ul > li > a:hover,
#nav-menu ul > li.current-menu-item > a,
#nav-menu ul > li.current-menu-parent > a {
    background: #f5f5f5;
    color: #1a73e8;
}

/* 二级菜单美化 */
#nav-menu ul ul,
#nav-menu .sub-menu {
    display: none;
    position: absolute;
    left: 0;
    top: 100%;
    min-width: 160px;
    background: #fff;
    border-radius: 0 0 8px 8px;
    border: 1px solid #e0e0e0;
    box-shadow: 0 8px 24px rgba(60,60,60,0.08), 0 1.5px 4px rgba(60,60,60,0.04);
    z-index: 1000;
    padding: 6px 0;
    margin-top: 2px;
    animation: fadeInMenu 0.18s;
}

@keyframes fadeInMenu {
    from { opacity: 0; transform: translateY(10px);}
    to { opacity: 1; transform: translateY(0);}
}

#nav-menu ul li:hover > ul,
#nav-menu ul li:focus-within > ul,
#nav-menu ul li:hover > .sub-menu,
#nav-menu ul li:focus-within > .sub-menu {
    display: block;
}

#nav-menu ul ul li {
    display: block;
    width: 100%;
    font-size: 15px;
}

#nav-menu ul ul li a {
    display: block;
    padding: 10px 22px;
    color: #444;
    background: none;
    border: none;
    border-radius: 0;
    transition: background 0.18s, color 0.18s;
    white-space: nowrap;
}

#nav-menu ul ul li a:hover,
#nav-menu ul ul li.current-menu-item > a {
    background: #f0f4fa;
    color: #1a73e8;
}

/* 二级菜单箭头提示 */
#nav-menu ul > li.menu-item-has-children > a::after {
    content: "▼";
    font-size: 0.65em;
    margin-left: 7px;
    color: #aaa;
    vertical-align: middle;
    transition: color 0.2s;
}
#nav-menu ul > li.menu-item-has-children:hover > a::after {
    color: #1a73e8;
}

/* 移动端隐藏二级菜单 */
@media (max-width: 860px) {
    #nav-menu ul {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 2px;
        width: 100%;
        padding-bottom: 2px;
    }
    #nav-menu ul > li {
        flex: 0 0 auto;
    }
    #nav-menu ul ul,
    #nav-menu .sub-menu {
        display: none !important;
        position: static;
        background: #fff;
        border: none;
        box-shadow: none;
        padding: 0;
        margin: 0;
    }
    #nav-menu ul > li > a {
        border-radius: 0;
        padding: 0 12px;
        height: 32px;
        line-height: 32px;
        font-size: 15px;
    }
}

/* 复古简洁黑白灰菜单，点缀色#e14d43，整体更小巧 */
#nav-menu ul {
    list-style: none;
    margin: 0;
    padding: 0;
    position: relative;
    display: flex;
    gap: 2px;
    background: none;
}

#nav-menu ul li {
    position: relative;
    font-size: 14px;
    font-weight: normal;
    transition: background 0.18s;
}

#nav-menu ul > li > a {
    display: block;
    padding: 0 14px;
    height: 32px;
    line-height: 32px;
    color: #222;
    border-radius: 3px 3px 0 0;
    background: none;
    transition: background 0.18s, color 0.18s;
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
    letter-spacing: 0.5px;
}

#nav-menu ul > li > a:hover,
#nav-menu ul > li.current-menu-item > a,
#nav-menu ul > li.current-menu-parent > a {
    background: #f5f5f5;
    color: #e14d43;
}

/* 二级菜单美化 */
#nav-menu ul ul,
#nav-menu .sub-menu {
    display: none;
    position: absolute;
    left: 0;
    top: 100%;
    min-width: 120px;
    background: #fff;
    border-radius: 0 0 4px 4px;
    border: 1px solid #e5e5e5;
    box-shadow: 0 4px 16px rgba(60,60,60,0.06);
    z-index: 1000;
    padding: 3px 0;
    margin-top: 1px;
    animation: fadeInMenu 0.16s;
}

@keyframes fadeInMenu {
    from { opacity: 0; transform: translateY(6px);}
    to { opacity: 1; transform: translateY(0);}
}

#nav-menu ul li:hover > ul,
#nav-menu ul li:focus-within > ul,
#nav-menu ul li:hover > .sub-menu,
#nav-menu ul li:focus-within > .sub-menu {
    display: block;
}

#nav-menu ul ul li {
    display: block;
    width: 100%;
    font-size: 15px;
}

#nav-menu ul ul li a {
    display: block;
    padding: 10px 22px;
    color: #444;
    background: none;
    border: none;
    border-radius: 0;
    transition: background 0.18s, color 0.18s;
    white-space: nowrap;
}

#nav-menu ul ul li a:hover,
#nav-menu ul ul li.current-menu-item > a {
    background: #f0f4fa;
    color: #1a73e8;
}

/* 二级菜单箭头提示 */
#nav-menu ul > li.menu-item-has-children > a::after {
    content: "▼";
    font-size: 0.65em;
    margin-left: 7px;
    color: #aaa;
    vertical-align: middle;
    transition: color 0.2s;
}
#nav-menu ul > li.menu-item-has-children:hover > a::after {
    color: #1a73e8;
}

/* 移动端隐藏二级菜单 */
@media (max-width: 860px) {
    #nav-menu ul {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 2px;
        width: 100%;
        padding-bottom: 2px;
    }
    #nav-menu ul > li {
        flex: 0 0 auto;
    }
    #nav-menu ul ul,
    #nav-menu .sub-menu {
        display: none !important;
        position: static;
        background: #fff;
        border: none;
        box-shadow: none;
        padding: 0;
        margin: 0;
    }
    #nav-menu ul > li > a {
        border-radius: 0;
        padding: 0 12px;
        height: 32px;
        line-height: 32px;
        font-size: 15px;
    }
}