.main-layout {
    min-height: 100vh;
}

.main-sider {
    background: var(--sider-bg) !important;
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    padding: 24px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    transition: padding 0.2s ease;
}

/* 折叠态收窄水平留白，与宽度动画同步 */
.ant-layout-sider-collapsed .sidebar-header {
    padding: 20px 8px;
}

.logo {
    position: relative;
    height: 31px;
    line-height: 31px;
    font-size: 22px;
    font-weight: 700;
    color: white;
    margin-bottom: 4px;
}

/* 全称与缩写叠加存放，折叠时交叉淡入淡出 */
.logo-full,
.logo-short {
    display: block;
    white-space: nowrap;
    transition:
        opacity 0.2s ease,
        transform 0.2s ease;
}

.logo-short {
    position: absolute;
    inset: 0;
    opacity: 0;
    transform: scale(0.5);
}

.ant-layout-sider-collapsed .logo-full {
    opacity: 0;
    transform: scale(0.5);
}

.ant-layout-sider-collapsed .logo-short {
    opacity: 1;
    transform: scale(1);
}

/* 副标题折叠时渐隐并收起占位高度 */
.logo-subtitle {
    max-height: 18px;
    overflow: hidden;
    opacity: 1;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.8);
    transition:
        opacity 0.2s ease,
        max-height 0.2s ease;
}

.ant-layout-sider-collapsed .logo-subtitle {
    max-height: 0;
    opacity: 0;
}

.main-header {
    background: white !important;
    padding: 0 24px !important;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow:
        0 1px 3px 0 rgba(0, 0, 0, 0.1),
        0 1px 2px 0 rgba(0, 0, 0, 0.06);
    position: sticky;
    top: 0;
    z-index: 100;
    height: 50px;
    line-height: 1;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.collapse-trigger,
.mobile-menu-trigger {
    font-size: 16px;
    cursor: pointer;
    color: #1f2937;
    border-radius: 4px;
    transition: background 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    flex-shrink: 0;
}

.collapse-trigger:hover,
.mobile-menu-trigger:hover {
    background: #f9fafb;
}

.page-breadcrumb {
    font-size: 14px;
    line-height: 1;
    white-space: nowrap;
}

.page-breadcrumb .ant-breadcrumb-link {
    color: #1f2937;
}

.breadcrumb-crumb {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.breadcrumb-crumb .anticon {
    font-size: 15px;
}

.page-breadcrumb .ant-breadcrumb-separator {
    color: #9ca3af;
}

.main-content {
    padding: 20px;
    background: #f3f4f6;
    min-height: calc(100vh - 50px);
}

@media (max-width: 768px) {
    .main-content {
        padding: 16px;
    }

    .main-header {
        padding: 0 16px !important;
    }
}