/* ===================================================
   弥渡商会 - 管理后台样式
   简洁实用风格，注重操作效率
   =================================================== */

/* --- 全局变量 --- */
:root {
    --primary: #1a56db;
    --primary-light: #3b82f6;
    --primary-bg: #eff6ff;
    --success: #059669;
    --success-bg: #ecfdf5;
    --warning: #d97706;
    --warning-bg: #fffbeb;
    --danger: #dc2626;
    --danger-bg: #fef2f2;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --radius: 8px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
}

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

body {
    font-family: -apple-system, "Microsoft YaHei", "PingFang SC", sans-serif;
    font-size: 14px;
    color: var(--gray-800);
    background-color: var(--gray-50);
    line-height: 1.5;
}

/* --- 顶部导航 --- */
.top-nav {
    position: fixed; top: 0; left: 0; right: 0;
    height: 56px;
    background: #fff;
    border-bottom: 1px solid var(--gray-200);
    z-index: 100;
    display: flex;
    align-items: center;
}
.nav-inner {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.nav-brand {
    font-size: 18px;
    font-weight: 600;
    color: var(--gray-900);
    display: flex;
    align-items: center;
    gap: 8px;
}
.brand-icon { font-size: 22px; }
.brand-sub {
    font-size: 12px;
    color: var(--gray-400);
    font-weight: normal;
    margin-left: 4px;
}
.nav-right {
    display: flex;
    align-items: center;
    gap: 16px;
}
.nav-user {
    font-size: 13px;
    color: var(--gray-500);
}

/* --- 侧边栏 --- */
.sidebar {
    position: fixed;
    top: 56px; left: 0; bottom: 0;
    width: 200px;
    background: #fff;
    border-right: 1px solid var(--gray-200);
    padding: 16px 0;
    overflow-y: auto;
    z-index: 90;
}
.side-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 24px;
    color: var(--gray-600);
    text-decoration: none;
    font-size: 14px;
    transition: all .15s ease;
}
.side-item:hover {
    background: var(--gray-50);
    color: var(--primary);
}
.side-item.active {
    background: var(--primary-bg);
    color: var(--primary);
    font-weight: 500;
    border-right: 3px solid var(--primary);
}
.side-divider {
    height: 1px;
    background: var(--gray-200);
    margin: 8px 20px;
}
.side-external { color: var(--gray-400); }
.side-external:hover { color: var(--success); }

/* --- 主内容区 --- */
.main-content {
    margin-left: 200px;
    margin-top: 56px;
    min-height: calc(100vh - 56px);
    padding: 28px;
}

/* 登录页全屏布局 */
body.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1a56db 0%, #7c3aed 100%);
    min-height: 100vh;
}

/* --- 按钮 --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    border-radius: var(--radius);
    border: 1px solid transparent;
    font-size: 14px;
    cursor: pointer;
    transition: all .15s;
    text-decoration: none;
    white-space: nowrap;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: #1644b0; }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #047857; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { #b91c1c; }
.btn-outline {
    background: transparent;
    color: var(--gray-600);
    border-color: var(--gray-300);
}
.btn-outline:hover { background: var(--gray-50); color: var(--gray-900); }
.btn-sm { padding: 5px 12px; font-size: 13px; }
.btn-lg { padding: 12px 28px; font-size: 15px; }
.btn-block { width: 100%; justify-content: center; }

/* --- 卡片 --- */
.card {
    background: #fff;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
}
.card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.card-header h2 {
    font-size: 16px;
    font-weight: 600;
    color: var(--gray-800);
}
.card-body { padding: 20px; }

/* --- 表格 --- */
.table-wrap {
    overflow-x: auto;
}
table.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}
.data-table th {
    background: var(--gray-50);
    padding: 10px 14px;
    text-align: left;
    font-weight: 500;
    color: var(--gray-500);
    font-size: 13px;
    white-space: nowrap;
    border-bottom: 2px solid var(--gray-200);
}
.data-table td {
    padding: 11px 14px;
    border-bottom: 1px solid var(--gray-100);
    vertical-align: middle;
}
.data-table tr:hover td { background: var(--gray-50); }
.data-table .cell-actions {
    display: flex;
    gap: 8px;
    white-space: nowrap;
}

/* --- 表单 --- */
.form-group {
    margin-bottom: 18px;
}
.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: 6px;
}
.form-group label .required {
    color: var(--danger);
}
.form-control {
    width: 100%;
    padding: 9px 12px;
    border: 1px solid var(--gray-300);
    border-radius: 6px;
    font-size: 14px;
    transition: border .15s;
    outline: none;
}
.form-control:focus {
    border-color: var(--primary-light);
    box-shadow: 0 0 0 3px rgba(59,130,246,.1);
}
select.form-control {
    appearance: auto;
}
textarea.form-control {
    resize: vertical;
    min-height: 80px;
}
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}
.form-hint {
    font-size: 12px;
    color: var(--gray-400);
    margin-top: 4px;
}
.file-upload-area {
    border: 2px dashed var(--gray-300);
    border-radius: var(--radius);
    padding: 20px;
    text-align: center;
    cursor: pointer;
    transition: border .15s;
}
.file-upload-area:hover {
    border-color: var(--primary-light);
}
.file-upload-area input[type="file"] { display: none; }
.file-preview img {
    max-width: 160px;
    max-height: 120px;
    border-radius: 6px;
    object-fit: cover;
}

/* --- 筛选栏 --- */
.filter-bar {
    display: flex;
    gap: 10px;
    align-items: center;
    margin-bottom: 18px;
    flex-wrap: wrap;
}
.filter-bar .form-control {
    width: 180px;
}
.filter-bar .btn { flex-shrink: 0; }

/* --- 分页 --- */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 6px;
    margin-top: 20px;
}
.pagination a,
.pagination span {
    padding: 7px 14px;
    border-radius: 6px;
    font-size: 13px;
    text-decoration: none;
    border: 1px solid var(--gray-200);
    color: var(--gray-600);
    background: #fff;
}
.pagination a:hover { background: var(--gray-50); border-color: var(--gray-300); }
.pagination .active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}
.pagination .disabled {
    opacity: .5;
    pointer-events: none;
}

/* --- 统计卡片（仪表盘）--- */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 18px;
    margin-bottom: 28px;
}
.stat-card {
    background: #fff;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    padding: 22px;
    display: flex;
    align-items: center;
    gap: 16px;
}
.stat-icon {
    width: 52px; height: 52px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}
.stat-icon.blue { background: var(--primary-bg); }
.stat-icon.green { background: var(--success-bg); }
.stat-icon.yellow { background: var(--warning-bg); }
.stat-info h3 { font-size: 26px; font-weight: 700; color: var(--gray-900); }
.stat-info p { font-size: 13px; color: var(--gray-500); margin-top: 2px; }

/* --- 登录页 --- */
.login-card {
    background: #fff;
    border-radius: 16px;
    padding: 44px 40px;
    width: 380px;
    box-shadow: 0 25px 60px rgba(0,0,0,.2);
}
.login-card .login-logo {
    text-align: center;
    font-size: 40px;
    margin-bottom: 8px;
}
.login-card h1 {
    text-align: center;
    font-size: 22px;
    margin-bottom: 24px;
    color: var(--gray-900);
}
.login-card .form-group { margin-bottom: 16px; }
.login-card .form-control {
    padding: 12px 14px;
    font-size: 15px;
}
.login-card .btn-login {
    width: 100%;
    padding: 12px;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: var(--radius);
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    margin-top: 8px;
}
.login-card .btn-login:hover { background: #1644b0; }

/* --- 消息提示 --- */
.flash-messages { margin-bottom: 18px; }
.flash-msg {
    padding: 10px 16px;
    border-radius: 6px;
    font-size: 14px;
    margin-bottom: 8px;
}
.flash-success { background: var(--success-bg); color: var(--success); }
.flash-error { background: var(--danger-bg); color: var(--danger); }

/* --- 标签/徽章 --- */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 500;
}
.badge-blue { background: var(--primary-bg); color: var(--primary); }
.badge-green { background: var(--success-bg); color: var(--success); }
.badge-gray { background: var(--gray-100); color: var(--gray-500); }

/* --- 详情信息列表 --- */
.info-list dt {
    font-size: 13px;
    color: var(--gray-500);
    margin-bottom: 2px;
}
.info-list dd {
    font-size: 15px;
    color: var(--gray-900);
    margin-bottom: 14px;
    font-weight: 500;
}

/* --- 分类管理表格 --- */
.category-table th:nth-child(1) { width: 60px; }
.category-table th:nth-child(2) { width: 80px; text-align:center; }
.category-table td:nth-child(2) { text-align:center; font-size: 20px; }
.cat-sort-input { width: 50px; text-align: center; }

/* --- 多选分类标签 --- */
.cat-tag {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border: 1px solid var(--gray-200);
    border-radius: 999px;
    font-size: 13px;
    margin: 2px 4px 2px 0;
    cursor: pointer;
    user-select: none;
    transition: all .15s;
}
.cat-tag:hover { border-color: var(--primary-light); }
.cat-tag.selected {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}
.cat-tags-container {
    display: flex;
    flex-wrap: wrap;
    gap: 0;
    padding: 8px;
    border: 1px solid var(--gray-300);
    border-radius: 6px;
    min-height: 42px;
}

/* --- 空状态 --- */
.empty-state {
    text-align: center;
    padding: 48px 20px;
    color: var(--gray-400);
}
.empty-state .empty-icon { font-size: 48px; margin-bottom: 12px; }

/* --- 页面标题区 --- */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}
.page-header h1 {
    font-size: 20px;
    font-weight: 600;
    color: var(--gray-900);
}
.page-header .header-actions { display: flex; gap: 10px; }

/* --- 响应式（小屏适配管理后台）--- */
@media (max-width: 768px) {
    .sidebar { display: none; }
    .main-content { margin-left: 0; }
    .form-row { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
}

/* --- 工具类 --- */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--gray-400); }
.text-danger { color: var(--danger); }
.text-success { color: var(--success); }
.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }
.mb-4 { margin-bottom: 16px; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.gap-2 { gap: 8px; }