.side-menu {
    width: 240px;
    background: var(--color-bg-card);
    list-style: none;
    z-index: var(--z-sticky);
    position: absolute;
    left: var(--space-sm);
    height: auto;
    min-height: 421px; /* 常驻分类栏：与首页轮播图同高，整列白底不露底 */
    box-shadow: 10px 0 30px rgba(0, 0, 0, 0.05);
    border: 1px solid rgba(0, 0, 0, 0.05);
    margin-left: var(--space-md);
    display: none;
    padding: 0;
    top: 56px;
    box-sizing: border-box;
}

.all-category-btn.always .side-menu {
    display: block;
}

.side-menu > li {
    padding: 14px 25px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.02);
    background: var(--color-bg-card);
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    justify-content: space-between;
    align-items: center;

    position: relative;
    z-index: var(--z-dropdown);
    color: var(--color-text-secondary);
}

.side-menu > li a {
    text-decoration: none;
    font-size: var(--font-size-btn);
    color: var(--color-text-secondary);
}

.side-menu > li i:first-child {
    transition: all 0.3s;
    width: 25px;
    color: var(--color-text-secondary);
}

.side-menu > li:hover {
    background: var(--color-primary);
    padding-left: 35px;
    color: var(--color-bg-card);
}

.side-menu > li:hover i,
.side-menu > li:hover > a {
    color: var(--color-bg-card);
}

.side-menu .sub-menu {
    position: absolute;
    top: 0;
    left: 240px;
    width: 280px;
    background: var(--color-bg-card);
    box-shadow: var(--shadow-md);
    list-style: none;
    padding: 15px 0;
    display: none;
    z-index: var(--z-dropdown);
    border-radius: 0 4px 4px 0;
}

.side-menu > li:hover .sub-menu {
    display: block;
    animation: subMenuFade 0.3s ease forwards;
}

.sub-menu > li {
    padding: 10px 25px;
    transition: all 0.2s ease;
    font-size: var(--font-size-caption);
}

.sub-menu > li > a {
    text-decoration: none;
    color: var(--color-text-body);
    display: block;
    width: 100%;
    height: 100%;
}

.sub-menu > li:hover {
    background: #f8f8f8;
    padding-left: 30px;
}

.sub-menu > li:hover a {
    color: var(--color-primary);
}

@keyframes subMenuFade {
    0% {
        opacity: 0;
        transform: translateX(10px);
    }
    100% {
        opacity: var(--z-base);
        transform: translateX(0);
    }
}

/* ---------- 首页轮播行内常驻分类栏（真两栏，不再悬浮遮挡轮播） ---------- */
/* 红色「全部商品分类」表头复用导航栏 .all-category-btn，列本身只放白色菜单面板 */
.cv-cat {
    flex: none;
    width: 240px;
    height: 421px;
    background: var(--color-bg-card);
    border: 1px solid rgba(0, 0, 0, 0.05);
    box-shadow: 10px 0 30px rgba(0, 0, 0, 0.05);
    box-sizing: border-box;
    position: relative;
    z-index: var(--z-sticky);
    display: flex;
    flex-direction: column;
}

.cv-cat .side-menu {
    position: static;
    display: block;
    width: 100%;
    min-height: 0;
    height: auto;
    flex: 1 1 auto;
    overflow: visible;
    margin-left: 0;
    box-shadow: none;
    border: none;
}

/* ---------- 首页「全部分类」四频道组件（hm-menu，二级+子类级联浮窗） ---------- */
/* 列内 4 个频道行均分高度铺满列体 */
.cv-cat .hm-menu {
    display: flex;
    flex-direction: column;
}

.cv-cat .hm-menu > li {
    flex: 1 1 0;
    min-height: 0;
}

/* 级联浮窗：二级类目作行标题，子类行内平铺 */
.hm-menu__panel {
    position: absolute;
    top: 0;
    left: 100%;
    width: 560px;
    max-height: 421px;
    overflow-y: auto;
    background: var(--color-bg-card);
    box-shadow: var(--shadow-md);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    padding: var(--space-sm) 0;
    display: none;
    z-index: var(--z-dropdown);
}

.hm-menu > li:hover .hm-menu__panel {
    display: block;
    animation: subMenuFade 0.3s ease forwards;
}

.hm-menu__row {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    padding: var(--space-md) 20px;
    transition: background var(--transition-fast);
}

.hm-menu__row:hover {
    background: var(--color-bg-hover);
}

.hm-menu__cat {
    flex: none;
    min-width: 88px;
    font-size: var(--font-size-body);
    font-weight: var(--font-weight-semibold);
    line-height: var(--line-height-caption);
    color: var(--color-text-primary);
}

.hm-menu__cat:hover {
    color: var(--color-primary);
}

.hm-menu__subs {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
}

.hm-menu__sub {
    font-size: var(--font-size-caption);
    line-height: var(--line-height-caption);
    color: var(--color-text-secondary);
    padding: 0 var(--space-sm);
    border-left: 1px solid var(--color-divider);
    white-space: nowrap;
}

.hm-menu__sub:first-child {
    border-left: none;
    padding-left: 0;
}

.hm-menu__sub:hover {
    color: var(--color-primary);
}

/* 频道行两行文本：主标题 + 分类预览副文案 */
.hm-menu > li > a {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.hm-menu__tt {
    display: flex;
    flex-direction: column;
    line-height: 1.3;
}

.hm-menu__name {
    font-size: var(--font-size-card-title);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
}

/* 频道图标加大 + 品牌红 */
.hm-menu > li i:first-child {
    font-size: 18px;
    color: var(--color-primary);
}

.side-menu > li:hover i:first-child {
    color: var(--color-bg-card);
}

.hm-menu__desc {
    font-size: var(--font-size-label);
    color: var(--color-text-tertiary);
    margin-top: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 150px;
}

.side-menu > li:hover .hm-menu__name,
.side-menu > li:hover .hm-menu__desc {
    color: var(--color-bg-card);
}