/* 二级菜单底部弹出面板样式 */
.submenu-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.45);
    z-index: 99998;
    opacity: 0;
    transition: opacity 0.3s ease;
    -webkit-tap-highlight-color: transparent;
}
.submenu-overlay.active {
    opacity: 1;
}
.submenu-panel {
    position: fixed;
    left: 0; right: 0; bottom: 0;
    background: #fff;
    border-radius: 16px 16px 0 0;
    z-index: 99999;
    transform: translateY(100%);
    transition: transform 0.35s cubic-bezier(0.32, 0.72, 0, 1);
    max-height: 70vh;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: env(safe-area-inset-bottom, 0px);
    box-shadow: 0 -4px 24px rgba(0,0,0,0.12);
}
.submenu-panel.active {
    transform: translateY(0);
}
.submenu-handle {
    width: 36px;
    height: 4px;
    background: #ddd;
    border-radius: 2px;
    margin: 10px auto 0;
    flex-shrink: 0;
}
.submenu-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px 16px;
    border-bottom: 1px solid #f0f0f0;
}
.submenu-title {
    font-size: 16px;
    font-weight: 600;
    color: #333;
    flex: 1;
    text-align: center;
    padding-right: 28px;
}
.submenu-close {
    width: 28px;
    height: 28px;
    border: none;
    background: #f5f5f5;
    border-radius: 50%;
    font-size: 18px;
    color: #999;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: background 0.2s;
    -webkit-tap-highlight-color: transparent;
}
.submenu-close:active {
    background: #e8e8e8;
}
.submenu-list {
    list-style: none;
    margin: 0;
    padding: 0;
}
.submenu-list-item {
    display: flex;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid #f5f5f5;
    cursor: pointer;
    transition: background 0.15s;
    -webkit-tap-highlight-color: transparent;
    text-decoration: none;
    color: #333;
}
.submenu-list-item:active {
    background: #f8f8f8;
}
.submenu-list-item:last-child {
    border-bottom: none;
}
.submenu-item-icon {
    width: 32px;
    height: 32px;
    background: #e8f0fe;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-right: 14px;
    font-size: 16px;
}
.submenu-item-text {
    flex: 1;
    font-size: 15px;
    font-weight: 500;
    color: #333;
}
.submenu-item-arrow {
    color: #ccc;
    font-size: 14px;
    flex-shrink: 0;
    margin-left: 8px;
}
.submenu-footer {
    padding: 12px 20px 20px;
    text-align: center;
    font-size: 12px;
    color: #ccc;
}
/* 有子菜单的选项标记 */
[data-submenu-idx] {
    position: relative;
}
[data-submenu-idx]::after {
    content: '▾';
    position: absolute;
    right: -20px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 14px;
    color: #de5511;
    opacity: 0.6;
    pointer-events: none;
}