/* PartCross 管理系统样式 */
:root {
    --primary: #4f46e5;
    --primary-dark: #4338ca;
    --primary-light: #e0e7ff;
    --success: #059669;
    --danger: #dc2626;
    --warning: #d97706;
    --info: #0284c7;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-500: #6b7280;
    --gray-700: #374151;
    --gray-900: #111827;
    --sidebar-width: 240px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
    font-size: 14px;
    color: var(--gray-900);
    background: var(--gray-100);
    line-height: 1.5;
}

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); text-decoration: underline; }

/* 布局 */
.admin-layout { display: flex; min-height: 100vh; }

.sidebar {
    width: var(--sidebar-width);
    background: var(--gray-900);
    color: #fff;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    overflow-y: auto;
    z-index: 100;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid rgba(255,255,255,.1);
}
.sidebar-header h2 { font-size: 16px; font-weight: 600; }
.sidebar-header small { color: var(--gray-500); font-size: 12px; }

.sidebar-nav { padding: 10px 0; }
.sidebar-nav a {
    display: flex;
    align-items: center;
    padding: 10px 20px;
    color: var(--gray-300);
    font-size: 14px;
    transition: all .15s;
}
.sidebar-nav a:hover { background: rgba(255,255,255,.1); color: #fff; text-decoration: none; }
.sidebar-nav a.active { background: var(--primary); color: #fff; }
.sidebar-nav .nav-group-title {
    padding: 15px 20px 5px;
    font-size: 11px;
    text-transform: uppercase;
    color: var(--gray-500);
    letter-spacing: .05em;
}
.sidebar-nav .badge {
    margin-left: auto;
    background: var(--danger);
    color: #fff;
    border-radius: 10px;
    padding: 1px 8px;
    font-size: 11px;
}
.sidebar-nav .nav-group-title {
    cursor: pointer;
    user-select: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.sidebar-nav .nav-group-title:hover { color: var(--gray-300); }
.sidebar-nav .nav-group-arrow {
    font-size: 10px;
    transition: transform .2s;
    display: inline-block;
}
.sidebar-nav .nav-group-items {
    overflow: hidden;
    max-height: 0;
    transition: max-height .25s ease;
}
.sidebar-nav .nav-group.is-open > .nav-group-items { max-height: 600px; }
.sidebar-nav .nav-group.is-open > .nav-group-title .nav-group-arrow { transform: none; }
.sidebar-nav .nav-group:not(.is-open) > .nav-group-title .nav-group-arrow { transform: rotate(-90deg); }

.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    min-width: 0;
}

.topbar {
    background: #fff;
    padding: 12px 24px;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 50;
}
.topbar-right { display: flex; align-items: center; gap: 12px; }
.topbar-right a { color: var(--gray-500); font-size: 13px; }

.content { padding: 24px; }

/* 卡片 */
.card {
    background: #fff;
    border-radius: 8px;
    border: 1px solid var(--gray-200);
    margin-bottom: 20px;
}
.card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.card-header h3 { font-size: 16px; font-weight: 600; }
.card-body { padding: 20px; }

/* 表格 */
.table-responsive { overflow-x: auto; }
table.data-table,
table.table {
    width: 100%;
    border-collapse: collapse;
}
table.data-table th,
table.data-table td,
table.table th,
table.table td {
    padding: 10px 14px;
    text-align: left;
    border-bottom: 1px solid var(--gray-200);
    font-size: 13px;
}
table.data-table th,
table.table th {
    background: var(--gray-50);
    font-weight: 600;
    color: var(--gray-700);
    white-space: nowrap;
}
table.data-table tr:hover,
table.table tr:hover { background: var(--gray-50); }
table.data-table .actions,
table.table .actions { white-space: nowrap; }
table.data-table .actions a,
table.data-table .actions button,
table.table .actions a,
table.table .actions button {
    margin-right: 6px;
    font-size: 12px;
}

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    padding: 7px 16px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 500;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all .15s;
    line-height: 1.5;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); color: #fff; }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { opacity: .9; color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { opacity: .9; color: #fff; }
.btn-warning { background: var(--warning); color: #fff; }
.btn-secondary { background: var(--gray-200); color: var(--gray-700); }
.btn-secondary:hover { background: var(--gray-300); }
.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn-outline { background: transparent; border-color: var(--gray-300); color: var(--gray-700); }
.btn-outline:hover { border-color: var(--gray-500); }

/* 表单 */
.form-group { margin-bottom: 16px; }
.form-group label {
    display: block;
    margin-bottom: 4px;
    font-weight: 500;
    font-size: 13px;
    color: var(--gray-700);
}
.form-control {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--gray-300);
    border-radius: 6px;
    font-size: 14px;
    transition: border-color .15s;
    font-family: inherit;
}
.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}
select.form-control { height: 38px; }
textarea.form-control { min-height: 100px; resize: vertical; }

.form-row { display: flex; gap: 16px; flex-wrap: wrap; }
.form-row .form-group { flex: 1; min-width: 160px; }

.form-inline { display: flex; gap: 10px; align-items: flex-end; }
.form-inline .form-group { margin-bottom: 0; }

/* 提示消息 */
.alert {
    padding: 12px 16px;
    border-radius: 6px;
    margin-bottom: 16px;
    font-size: 13px;
}
.alert-success { background: #ecfdf5; color: #065f46; border: 1px solid #a7f3d0; }
.alert-danger { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }
.alert-warning { background: #fffbeb; color: #92400e; border: 1px solid #fde68a; }
.alert-info { background: #eff6ff; color: #1e40af; border: 1px solid #bfdbfe; }

/* 分页 */
.pagination-nav { margin-top: 20px; display: flex; justify-content: center; }
.pagination {
    list-style: none;
    display: flex;
    gap: 4px;
}
.pagination li a,
.pagination li span {
    display: inline-block;
    padding: 6px 12px;
    border: 1px solid var(--gray-300);
    border-radius: 4px;
    font-size: 13px;
    color: var(--gray-700);
}
.pagination li a:hover { background: var(--gray-100); text-decoration: none; }
.pagination li.active span { background: var(--primary); color: #fff; border-color: var(--primary); }
.pagination li.disabled span { color: var(--gray-300); }

/* 统计卡片 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}
.stat-card {
    background: #fff;
    border-radius: 8px;
    padding: 20px;
    border: 1px solid var(--gray-200);
}
.stat-card .stat-value { font-size: 28px; font-weight: 700; color: var(--gray-900); }
.stat-card .stat-label { font-size: 13px; color: var(--gray-500); margin-top: 4px; }

/* 登录页 */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}
.login-box {
    background: #fff;
    padding: 40px;
    border-radius: 12px;
    width: 400px;
    max-width: 90%;
    box-shadow: 0 20px 60px rgba(0,0,0,.2);
}
.login-box h1 { text-align: center; margin-bottom: 8px; font-size: 22px; }
.login-box .subtitle { text-align: center; color: var(--gray-500); margin-bottom: 24px; font-size: 14px; }
.login-box .btn { width: 100%; justify-content: center; padding: 10px; font-size: 15px; }

/* 状态标签 */
.status-badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 10px;
    font-size: 12px;
    font-weight: 500;
}
.status-active { background: #ecfdf5; color: #059669; }
.status-inactive { background: #fef2f2; color: #dc2626; }
.status-unread { background: #fef3c7; color: #d97706; }

/* 图片缩略图 */
.thumb { width: 50px; height: 50px; object-fit: cover; border-radius: 4px; }
.thumb-lg { width: 80px; height: 80px; }

/* 搜索工具栏 */
.toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    flex-wrap: wrap;
    gap: 10px;
}

/* 确认删除 */
form.inline-form { display: inline; }
.confirm-delete { background: none; border: none; color: var(--danger); cursor: pointer; font-size: 12px; padding: 0; }
.confirm-delete:hover { text-decoration: underline; }

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--gray-500);
}
.empty-state p { margin-bottom: 16px; }

/* 返回顶部按钮 */
.back-link { color: var(--gray-500); font-size: 13px; margin-bottom: 16px; display: inline-block; }
.back-link:hover { color: var(--gray-700); }

/* ===== 页面标题栏 ===== */
.content-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 2px solid var(--gray-200);
}
.content-header h2 {
    font-size: 20px;
    font-weight: 700;
    color: var(--gray-900);
    margin: 0;
}
.content-header h3 {
    font-size: 16px;
    font-weight: 600;
    margin: 0;
}
.content-header .actions { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }

/* ===== 徽章 ===== */
.badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 10px;
    font-size: 12px;
    font-weight: 500;
    line-height: 1.6;
}
.badge-primary   { background: var(--primary-light); color: var(--primary-dark); }
.badge-success   { background: #ecfdf5; color: #059669; }
.badge-danger    { background: #fef2f2; color: #dc2626; }
.badge-warning   { background: #fffbeb; color: #92400e; }
.badge-secondary { background: var(--gray-100); color: var(--gray-700); border: 1px solid var(--gray-200); }
.badge-info      { background: #eff6ff; color: #1e40af; }

/* ===== 卡片增强 ===== */
/* 表格直接放在 card 里时无需内边距，分页加上间距和分割线 */
.card > .pagination-nav {
    padding: 12px 16px;
    border-top: 1px solid var(--gray-200);
    margin-top: 0;
}

/* 搜索工具卡片 */
.card.card-search { padding: 1rem; margin-bottom: 16px; }
.card.card-search > form { padding: 0; }

/* 表单放在 card 里时自动加内边距 */
.card > form { padding: 24px; }
.card > form .form-actions {
    padding-top: 8px;
    border-top: 1px solid var(--gray-200);
    margin-top: 8px;
}

/* ===== 表格操作列间距 ===== */
table.table .actions > *,
table.data-table .actions > * { margin-right: 4px; }
table.table .actions > *:last-child,
table.data-table .actions > *:last-child { margin-right: 0; }

/* ===== topbar 标题 ===== */
.topbar > div:first-child {
    font-weight: 600;
    font-size: 15px;
    color: var(--gray-700);
}

/* ===== 表格内文字换行优化 ===== */
table.table td, table.data-table td { vertical-align: middle; }
table.table small, table.data-table small { color: var(--gray-500); }

/* ===== 空状态居中文字 ===== */
table.table td[colspan],
table.data-table td[colspan] {
    text-align: center;
    color: var(--gray-500);
    padding: 40px 20px;
}

/* ===== 统计页顶部间距 ===== */
.stats-grid { margin-top: 4px; }

/* ===== 侧边栏分组标题间距优化 ===== */
.sidebar-nav .nav-group-title { margin-top: 4px; }

/* ===== 表单内 checkbox/radio 行 ===== */
.form-check {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px 0;
}
.form-check input[type="checkbox"],
.form-check input[type="radio"] { width: 16px; height: 16px; cursor: pointer; }

/* ===== 行内表单（搜索栏）统一封装 ===== */
.search-bar {
    display: flex;
    gap: 10px;
    align-items: flex-end;
    flex-wrap: wrap;
}
.search-bar .form-group { margin-bottom: 0; }
.search-bar .form-group.flex-1 { flex: 1; min-width: 160px; }