/* ========== 菜单容器 ========== */
#subcol {
    display: none;
}

#subnav {
    background: #fff;
    border-bottom: 2px solid rgba(10, 173, 168, 0.12);
    box-shadow: 0 4px 20px rgba(10, 173, 168, 0.08);
    position: sticky;
    top: 0;
    z-index: 700;
}

.subnav-container {
    background: #ffffff;
    /*border-radius: 8px;*/
    /*box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);*/
    padding: 0 24px;
    width: 100%;
    max-width: 1280px;
    position: relative;
    margin: 0 auto;
}

/* ========== 一级菜单（横向导航） ========== */
.submenu-level0 {
    display: flex;
    list-style: none;
    gap: 0;
    margin: 0;
    padding: 0;
    position: relative;
}

.submenu-level0>.submenu-item {
    position: relative;
    list-style: none;
}

.submenu-level0>.submenu-item>.submenu-link {
    display: block;
    padding: 16px 28px;
    color: #333333;
    text-decoration: none;
    font-size: 16px;
    font-weight: 500;
    white-space: nowrap;
    transition: background 0.25s, color 0.25s;
    /*border-radius: 4px 4px 0 0;*/
    position: relative;
    z-index: 90;
}

.submenu-level0>.submenu-item>.submenu-link:hover,
.submenu-level0>.submenu-item:hover>.submenu-link {
    background: #f0fbff;
    color: #0aada8;
}

/* 一级菜单项之间的分隔线 */
.submenu-level0>.submenu-item+.submenu-item>.submenu-link::before {
    content: '';
    position: absolute;
    left: -1px;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 24px;
    background: #e8eaed;
}

/* ========== 二级菜单（纵向下拉） ========== */
.submenu-level1 {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 239px;
    background: #ffffff;
    /*border-radius: 0 0 8px 8px;*/
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.12);
    padding: 8px 0;
    list-style: none;
    z-index: 100;
    border: 1px solid #eef0f2;
    border-top: 2px solid #0aada8;
}

.submenu-level0>.submenu-item:hover>.submenu-level1 {
    display: block;
    animation: fadeInDown 0.2s ease;
}

.submenu-level1 .submenu-item {
    position: relative;
    list-style: none;
}

.submenu-level1 .submenu-link {
    display: block;
    padding: 10px 20px;
    color: #333333;
    text-decoration: none;
    font-size: 14px;
    transition: background 0.2s, color 0.2s;
    white-space: nowrap;
    border-left: 3px solid transparent;
}

.submenu-level1 .submenu-link:hover {
    background: #f0fbff;
    color: #0aada8;
    border-left-color: #0aada8;
}

/* 二级菜单中如果有子菜单，显示箭头 */
.submenu-level1 .submenu-item.has-children>.submenu-link::after {
    content: '▸';
    float: right;
    margin-left: 12px;
    font-size: 14px;
    color: #999;
    transition: transform 0.2s;
}

.submenu-level1 .submenu-item.has-children>.submenu-link:hover::after {
    color: #0aada8;
    transform: translateX(3px);
}

/* ========== 三级菜单（横向） ========== */
.submenu-level2 {
    display: none;
    position: absolute;
    top: -8px;
    left: 100%;
    padding-left: 6px;
    z-index: 110;
}

.submenu-level2-inner {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    background: #ffffff;
    /*border-radius: 8px;*/
    box-shadow: 0 8px 28px rgba(0, 0, 0, 0.13);
    padding: 12px 16px;
    min-width: 239px;
    max-width: 580px;
    border: 1px solid #eef0f2;
    border-left: 3px solid #0aada8;
}

.submenu-level1 .submenu-item:hover>.submenu-level2 {
    display: block;
    animation: fadeInLeft 0.2s ease;
}

.submenu-level2 .submenu-item {
    list-style: none;
    flex: 0 0 auto;
}

.submenu-level2 .submenu-link {
    display: inline-block;
    padding: 6px 16px;
    color: #333333;
    text-decoration: none;
    font-size: 13px;
    background: #f5f7fa;
    border-radius: 16px;
    transition: background 0.2s, color 0.2s, transform 0.15s;
    white-space: nowrap;
    border: 1px solid #e8eaed;
}

.submenu-level2 .submenu-link:hover {
    background: #f0fbff;
    color: #0aada8;
    border-color: #0aada8;
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(46, 125, 50, 0.10);
}

/* 三级菜单中如果有子菜单（即四级），显示特殊标记 */
.submenu-level2 .submenu-item.has-children>.submenu-link {
    padding-right: 28px;
    position: relative;
}

.submenu-level2 .submenu-item.has-children>.submenu-link::after {
    content: '';
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 14px;
    color: #0aada8;
    font-weight: 700;
}

/* ========== 四级菜单（横向） ========== */
.submenu-level3 {
    display: none;
    position: absolute;
    top: -8px;
    left: 100%;
    padding-left: 6px;
    z-index: 120;
}

.submenu-level3-inner {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    background: #ffffff;
    /*border-radius: 8px;*/
    box-shadow: 0 8px 28px rgba(0, 0, 0, 0.13);
    padding: 12px 16px;
    min-width: 239px;
    max-width: 580px;
    border: 1px solid #eef0f2;
    border-left: 3px solid #0aada8;
}

.submenu-level2 .submenu-item:hover>.submenu-level3 {
    display: block;
    animation: fadeInLeft 0.2s ease;
}

.submenu-level3 .submenu-item {
    list-style: none;
    flex: 0 0 auto;
}

.submenu-level3 .submenu-link {
    display: inline-block;
    padding: 5px 14px;
    color: #333333;
    text-decoration: none;
    font-size: 12.5px;
    background: #fafafa;
    border-radius: 14px;
    transition: background 0.2s, color 0.2s, transform 0.15s;
    white-space: nowrap;
    border: 1px solid #e8eaed;
}

.submenu-level3 .submenu-link:hover {
    background: #f0fbff;
    color: #0aada8;
    border-color: #0aada8;
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(249, 168, 37, 0.12);
}

/* ========== 动画 ========== */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-6px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-6px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* ========== 无子菜单的一级项 ========== */
.submenu-level0>.submenu-item.no-children>.submenu-link {
    cursor: pointer;
}

.submenu-level0>.submenu-item.no-children>.submenu-link:hover {
    background: #f0fbff;
    color: #1a73e8;
}

/* ========== 响应式 ========== */
@media (max-width: 900px) {
    .subnav-container {
        padding: 0 12px;
    }

    .submenu-level0>.submenu-item>.submenu-link {
        padding: 14px 16px;
        font-size: 14px;
    }

    .submenu-level1 {
        min-width: 239px;
    }

    .submenu-level2-inner,
    .submenu-level3-inner {
        max-width: 580px;
        padding: 8px 10px;
    }

    .submenu-level2 .submenu-link,
    .submenu-level3 .submenu-link {
        font-size: 12px;
        padding: 4px 12px;
    }
}

@media (max-width: 640px) {
    .submenu-level0 {
        flex-wrap: wrap;
        gap: 0;
    }

    .submenu-level0>.submenu-item>.submenu-link {
        padding: 12px 14px;
        font-size: 13px;
    }

    .submenu-level0>.submenu-item+.submenu-item>.submenu-link::before {
        display: none;
    }

    .submenu-level1 {
        position: static;
        box-shadow: none;
        border: none;
        background: #fafafa;
        padding: 4px 0 4px 16px;
        border-radius: 0;
        border-left: 2px solid #0aada8;
        margin-top: 2px;
    }

    .submenu-level0>.submenu-item:hover>.submenu-level1 {
        display: none;
    }

    .submenu-level0>.submenu-item.active-mobile>.submenu-level1 {
        display: block !important;
    }

    .submenu-level2,
    .submenu-level3 {
        position: static;
        padding-left: 16px;
        margin-top: 2px;
    }

    .submenu-level2-inner,
    .submenu-level3-inner {
        max-width: 100%;
        box-shadow: none;
        border: none;
        background: #fafafa;
        padding: 6px 8px;
        border-left: 2px solid #0aada8;
        border-radius: 0;
    }

    .submenu-level3-inner {
        border-left-color: #0aada8;
    }

    .submenu-level1 .submenu-item:hover>.submenu-level2,
    .submenu-level2 .submenu-item:hover>.submenu-level3 {
        display: none;
    }

    .submenu-level1 .submenu-item.active-mobile>.submenu-level2,
    .submenu-level2 .submenu-item.active-mobile>.submenu-level3 {
        display: block !important;
    }

    /* 移动端点击切换 */
    .submenu-link-touch {
        cursor: pointer;
    }
}

/* ========== 工具类 ========== */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

/* ========== 数据源隐藏 ========== */
#data-source {
    display: none;
}

/* ========== 菜单标题装饰 ========== */
.submenu-header {
    text-align: center;
    padding: 12px 0 8px;
    font-size: 14px;
    color: #999;
    letter-spacing: 2px;
    border-bottom: 1px solid #f0f0f0;
    margin-bottom: 4px;
}

.submenu-header strong {
    color: #333;
    font-weight: 600;
}

/* 当前页面高亮（演示用） */
.submenu-link.active {
    color: #1a73e8 !important;
    font-weight: 600 !important;
    background: #e8f0fe !important;
}