/* ============================================================================
   平台后台主框架布局样式
   ============================================================================ */

.ad-layout { display: flex; min-height: 100vh; background: var(--ad-bg-page); }

/* ----------------------------------------------------------------------------
   侧边栏
---------------------------------------------------------------------------- */
.ad-sidebar {
    width: 220px;
    background: #fff;
    border-right: 1px solid var(--ad-border-light);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    transition: width 0.2s ease;
    z-index: 100;
}
.ad-sidebar--collapsed { width: 64px; }

.ad-sidebar__logo {
    height: 56px;
    display: flex;
    align-items: center;
    padding: 0 var(--ad-gap-md);
    border-bottom: 1px solid var(--ad-border-light);
    overflow: hidden;
    gap: 10px;
}
.ad-sidebar__logo-mark {
    width: 32px; height: 32px;
    background: linear-gradient(135deg, var(--ad-primary), #5B8FF9);
    border-radius: var(--ad-radius-base);
    display: flex; align-items: center; justify-content: center;
    color: #fff; font-weight: 700; font-size: 14px;
    flex-shrink: 0;
}
.ad-sidebar__logo-img {
    width: 32px; height: 32px;
    border-radius: var(--ad-radius-lg);
    object-fit: cover;
    flex-shrink: 0;
    background: #fff;
    border: 1px solid var(--ad-border);
}
.ad-sidebar__logo-text {
    color: var(--ad-text-primary);
    font-size: var(--ad-font-md);
    font-weight: var(--ad-fw-semibold);
    white-space: nowrap;
}
.ad-sidebar--collapsed .ad-sidebar__logo-text { display: none; }

.ad-sidebar__nav { flex: 1; padding: var(--ad-gap-sm) 0; overflow-y: auto; }
.ad-nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    height: 40px;
    padding: 0 var(--ad-gap-md);
    margin: 2px var(--ad-gap-sm);
    color: var(--ad-text-regular);
    border-radius: var(--ad-radius-base);
    cursor: pointer;
    transition: var(--ad-transition);
    font-size: var(--ad-font-base);
    white-space: nowrap;
    position: relative;
}
.ad-nav-item:hover { background: var(--ad-bg-hover); color: var(--ad-text-primary); }
.ad-nav-item--active {
    background: var(--ad-primary-light);
    color: var(--ad-primary);
    font-weight: var(--ad-fw-medium);
}
.ad-nav-item--active::before {
    content: "";
    position: absolute;
    left: -8px;
    top: 8px; bottom: 8px;
    width: 3px;
    background: var(--ad-primary);
    border-radius: 0 3px 3px 0;
}
.ad-nav-item .layui-icon { font-size: 16px; flex-shrink: 0; }
.ad-sidebar--collapsed .ad-nav-item { justify-content: center; padding: 0; }
.ad-sidebar--collapsed .ad-nav-item .ad-nav-item__text { display: none; }

/* ----------------------------------------------------------------------------
   顶栏
---------------------------------------------------------------------------- */
.ad-main { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.ad-header {
    height: 56px;
    background: #fff;
    border-bottom: 1px solid var(--ad-border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--ad-gap-lg);
    position: sticky; top: 0; z-index: 99;
}
.ad-header__left { display: flex; align-items: center; gap: var(--ad-gap-md); }
.ad-header__collapse {
    cursor: pointer;
    color: var(--ad-text-secondary);
    width: 32px; height: 32px;
    display: flex; align-items: center; justify-content: center;
    border-radius: var(--ad-radius-base);
    transition: var(--ad-transition);
}
.ad-header__collapse:hover { background: var(--ad-bg-hover); color: var(--ad-text-primary); }
.ad-header__breadcrumb {
    color: var(--ad-text-secondary);
    font-size: var(--ad-font-base);
    display: flex; align-items: center; gap: 8px;
}
.ad-header__breadcrumb .ad-current { color: var(--ad-text-primary); font-weight: var(--ad-fw-medium); }
.ad-header__right { display: flex; align-items: center; gap: var(--ad-gap-base); }
.ad-header__user {
    display: flex; align-items: center; gap: 8px;
    padding: 4px 8px;
    border-radius: var(--ad-radius-base);
    cursor: pointer;
    transition: var(--ad-transition);
}
.ad-header__user:hover { background: var(--ad-bg-hover); }
.ad-header__avatar {
    width: 28px; height: 28px;
    background: linear-gradient(135deg, var(--ad-primary), #5B8FF9);
    border-radius: var(--ad-radius-full);
    display: flex; align-items: center; justify-content: center;
    color: #fff; font-size: 12px;
    overflow: hidden;
    flex-shrink: 0;
}
img.ad-header__avatar {
    background: #fff;
    padding: 2px;
    object-fit: contain;
    box-sizing: border-box;
}
.ad-header__username { color: var(--ad-text-regular); font-size: var(--ad-font-base); }

/* 用户下拉菜单 */
.ad-header__user { position: relative; }
.ad-user-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 160px;
    background: var(--ad-bg-card);
    border: 1px solid var(--ad-border);
    border-radius: var(--ad-radius-base);
    box-shadow: var(--ad-shadow-lg);
    padding: 6px 0;
    display: none;
    z-index: 1000;
}
.ad-user-dropdown.ad-user-dropdown--show { display: block; }
.ad-user-dropdown__item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    font-size: var(--ad-font-base);
    color: var(--ad-text-regular);
    cursor: pointer;
    transition: var(--ad-transition);
    text-decoration: none;
}
.ad-user-dropdown__item:hover { background: var(--ad-bg-hover); color: var(--ad-text-primary); }
.ad-user-dropdown__item .layui-icon { font-size: 16px; color: var(--ad-text-secondary); }
.ad-user-dropdown__item.ad-user-dropdown__item--danger { color: var(--ad-danger); }
.ad-user-dropdown__item.ad-user-dropdown__item--danger .layui-icon { color: var(--ad-danger); }
.ad-user-dropdown__item.ad-user-dropdown__item--danger:hover { background: rgba(245, 34, 45, 0.08); }
.ad-user-dropdown__divider {
    height: 1px;
    background: var(--ad-border-light);
    margin: 4px 0;
}

/* ----------------------------------------------------------------------------
   内容区
---------------------------------------------------------------------------- */
.ad-content {
    flex: 1;
    padding: var(--ad-gap-lg);
    overflow: auto;
}
.ad-content__toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--ad-gap-md);
    gap: var(--ad-gap-md);
}
.ad-content__toolbar-left { display: flex; align-items: center; gap: var(--ad-gap-sm); flex-wrap: wrap; }
.ad-content__toolbar-right { display: flex; align-items: center; gap: var(--ad-gap-sm); }

.ad-page-title {
    font-size: var(--ad-font-xl);
    color: var(--ad-text-primary);
    font-weight: var(--ad-fw-semibold);
    margin: 0 0 var(--ad-gap-md);
}

.ad-pagination { display: flex; align-items: center; justify-content: flex-end; gap: 4px; margin-top: var(--ad-gap-md); }
.ad-pagination .layui-laypage a, .ad-pagination .layui-laypage span { border-radius: var(--ad-radius-sm) !important; border-color: var(--ad-border) !important; }

/* 响应式：窄屏自动折叠侧边栏 */
@media (max-width: 768px) {
    .ad-sidebar { position: fixed; left: 0; top: 0; bottom: 0; transform: translateX(-100%); transition: transform 0.2s; }
    .ad-sidebar--mobile-open { transform: translateX(0); box-shadow: var(--ad-shadow-lg); }
}