/* ==========================================
   河口天诚科技 - 后台管理样式
   ========================================== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
:root {
    --primary: #1a56db; --primary-dark: #1e40af; --primary-light: #dbeafe;
    --secondary: #0f172a; --success: #10b981; --danger: #ef4444;
    --warning: #f59e0b; --info: #3b82f6;
    --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: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.07);
}
body { font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif; font-size: 14px; color: var(--gray-700); background: var(--gray-50); }
a { color: var(--primary); text-decoration: none; }
ul { list-style: none; }

/* Login */
.login-page { display: flex; align-items: center; justify-content: center; min-height: 100vh; background: linear-gradient(135deg, var(--secondary), var(--primary-dark)); }
.login-container { width: 100%; max-width: 420px; padding: 20px; }
.login-card { background: #fff; border-radius: 12px; padding: 40px; box-shadow: 0 20px 60px rgba(0,0,0,0.2); }
.login-header { text-align: center; margin-bottom: 30px; }
.login-header h1 { font-size: 28px; color: var(--primary); margin-bottom: 8px; }
.login-header p { color: var(--gray-500); }
.login-form .form-group { margin-bottom: 20px; }
.login-form label { display: block; margin-bottom: 6px; font-weight: 500; color: var(--gray-700); }
.login-form input { width: 100%; padding: 12px 16px; border: 1px solid var(--gray-300); border-radius: var(--radius); font-size: 15px; }
.login-form input:focus { border-color: var(--primary); outline: none; box-shadow: 0 0 0 3px rgba(26,86,219,0.1); }
.login-footer { text-align: center; margin-top: 24px; }
.login-footer a { color: var(--gray-500); font-size: 13px; }

/* Layout */
.admin-wrapper { display: flex; min-height: 100vh; }
.admin-sidebar { width: 240px; background: var(--secondary); color: #fff; flex-shrink: 0; overflow-y: auto; position: fixed; top: 0; left: 0; bottom: 0; z-index: 100; }
.sidebar-header { padding: 20px; border-bottom: 1px solid rgba(255,255,255,0.1); }
.sidebar-logo { color: #fff; display: block; }
.sidebar-logo span { font-size: 18px; font-weight: 700; }
.sidebar-logo small { display: block; font-size: 11px; color: var(--gray-400); margin-top: 2px; }
.sidebar-nav { padding: 12px 0; }
.nav-group { margin-bottom: 8px; }
.nav-group-title { display: block; padding: 8px 20px; font-size: 12px; color: var(--gray-400); text-transform: uppercase; letter-spacing: 1px; }
.nav-group ul li a { display: block; padding: 10px 20px 10px 32px; color: var(--gray-300); font-size: 14px; transition: all 0.2s; }
.nav-group ul li a:hover, .nav-group ul li a.active { color: #fff; background: rgba(255,255,255,0.1); }
.admin-main { margin-left: 240px; flex: 1; }
.admin-header { background: #fff; height: 56px; display: flex; align-items: center; justify-content: space-between; padding: 0 24px; box-shadow: var(--shadow); position: sticky; top: 0; z-index: 50; }
.sidebar-toggle { display: none; background: none; border: none; font-size: 22px; cursor: pointer; color: var(--gray-600); }
.header-right { display: flex; align-items: center; gap: 12px; }
.admin-user { font-size: 14px; color: var(--gray-600); }
.admin-content { padding: 24px; }

/* Buttons */
.btn { display: inline-block; padding: 8px 20px; border: 1px solid transparent; border-radius: 6px; font-size: 14px; cursor: pointer; text-align: center; transition: all 0.2s; background: #fff; color: var(--gray-700); }
.btn:hover { opacity: 0.9; }
.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-success { background: var(--success); color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-sm { padding: 5px 12px; font-size: 12px; }
.btn-lg { padding: 12px 28px; font-size: 16px; }
.btn-block { display: block; width: 100%; }

/* Badge */
.badge { display: inline-block; padding: 2px 8px; font-size: 12px; border-radius: 4px; font-weight: 500; }
.badge-primary { background: var(--primary-light); color: var(--primary); }
.badge-success { background: #d1fae5; color: #065f46; }
.badge-danger { background: #fee2e2; color: #991b1b; }
.badge-warning { background: #fef3c7; color: #92400e; }
.badge-info { background: #dbeafe; color: #1e40af; }
.badge-secondary { background: var(--gray-200); color: var(--gray-600); }
.badge-lg { padding: 4px 12px; font-size: 14px; }

/* Alert */
.alert { padding: 12px 18px; border-radius: var(--radius); margin-bottom: 16px; font-size: 14px; }
.alert-success { background: #f0fdf4; color: #166534; border: 1px solid #bbf7d0; }
.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; }

/* Page Header */
.page-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; }
.page-header h2 { font-size: 22px; color: var(--gray-900); }
.header-actions { display: flex; gap: 8px; }

/* Stats Grid */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 24px; }
.stat-card { background: #fff; border-radius: var(--radius); padding: 20px 24px; box-shadow: var(--shadow); display: flex; align-items: center; gap: 16px; }
.stat-icon { font-size: 32px; }
.stat-value { font-size: 28px; font-weight: 700; color: var(--gray-900); }
.stat-value.highlight { color: var(--primary); }
.stat-label { font-size: 13px; color: var(--gray-500); margin-top: 2px; }

/* Admin Card */
.admin-card { background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); }
.admin-card .card-header { display: flex; justify-content: space-between; align-items: center; padding: 16px 20px; border-bottom: 1px solid var(--gray-100); }
.admin-card .card-header h3 { font-size: 16px; color: var(--gray-900); }
.admin-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }

/* Data Table */
.data-table { width: 100%; border-collapse: collapse; }
.data-table th { text-align: left; padding: 12px 16px; background: var(--gray-50); font-size: 13px; font-weight: 600; color: var(--gray-600); border-bottom: 2px solid var(--gray-200); }
.data-table td { padding: 12px 16px; border-bottom: 1px solid var(--gray-100); font-size: 13px; }
.data-table tbody tr:hover { background: var(--gray-50); }
.data-table tbody tr.unread { background: #eff6ff; }

/* Forms */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; margin-bottom: 6px; font-weight: 500; color: var(--gray-700); font-size: 13px; }
.required { color: var(--danger); }
.form-group input[type="text"],
.form-group input[type="tel"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="number"],
.form-group input[type="datetime-local"],
.form-group select,
.form-group textarea { width: 100%; padding: 9px 14px; border: 1px solid var(--gray-300); border-radius: 6px; font-size: 14px; color: var(--gray-700); background: #fff; transition: border-color 0.2s; }
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { border-color: var(--primary); outline: none; box-shadow: 0 0 0 3px rgba(26,86,219,0.1); }
.form-group textarea { resize: vertical; min-height: 100px; }
.form-group select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%236b7280' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 12px center; padding-right: 35px; }
.form-row { display: flex; gap: 16px; align-items: flex-start; }
.form-row .form-group { flex: 1; }
.flex-1 { flex: 1; }
.form-message { margin-top: 12px; }
.admin-form { padding: 24px; }

/* Filter Form */
.filter-form { padding: 16px 20px; }
.filter-form .form-group { margin-bottom: 0; }

/* Detail Grid */
.detail-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.detail-item { }
.detail-item label { display: block; font-size: 12px; color: var(--gray-400); margin-bottom: 4px; }
.detail-item span { font-size: 14px; color: var(--gray-700); }
.detail-text { background: var(--gray-50); padding: 16px; border-radius: var(--radius); font-size: 14px; line-height: 1.8; color: var(--gray-600); white-space: pre-wrap; }

/* Modal */
.modal { display: none; position: fixed; inset: 0; z-index: 2000; align-items: center; justify-content: center; }
.modal-overlay { position: absolute; inset: 0; background: rgba(0,0,0,0.5); }
.modal-content { position: relative; background: #fff; border-radius: var(--radius); max-width: 500px; width: 90%; max-height: 80vh; overflow-y: auto; box-shadow: 0 20px 60px rgba(0,0,0,0.3); }
.modal-header { display: flex; justify-content: space-between; align-items: center; padding: 16px 24px; border-bottom: 1px solid var(--gray-200); }
.modal-close { background: none; border: none; font-size: 20px; cursor: pointer; color: var(--gray-400); }
.modal-body { padding: 24px; }

/* Status Distribution */
.status-distribution { padding: 0; }
.status-bar-item { margin-bottom: 14px; }
.status-bar-label { display: flex; justify-content: space-between; margin-bottom: 6px; font-size: 13px; }
.status-bar-count { color: var(--gray-500); }
.status-bar-track { height: 8px; background: var(--gray-100); border-radius: 4px; overflow: hidden; }
.status-bar-fill { height: 100%; border-radius: 4px; transition: width 0.3s; }

/* Chart */
.chart-container { padding: 20px; }
.bar-chart { display: flex; align-items: flex-end; gap: 4px; height: 240px; }
.bar-item { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: flex-end; min-width: 20px; }
.bar-value { font-size: 10px; color: var(--gray-500); margin-bottom: 4px; }
.bar { width: 100%; max-width: 30px; background: var(--primary); border-radius: 4px 4px 0 0; transition: all 0.3s; }
.bar:hover { background: var(--primary-dark); }
.bar-label { font-size: 10px; color: var(--gray-400); margin-top: 6px; transform: rotate(-45deg); white-space: nowrap; }

/* Pagination */
.pagination { display: flex; justify-content: center; align-items: center; gap: 8px; }
.page-link { padding: 6px 14px; background: #fff; border: 1px solid var(--gray-300); border-radius: 6px; font-size: 13px; color: var(--gray-600); }
.page-link:hover, .page-link.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.page-info { font-size: 13px; color: var(--gray-400); margin-left: 8px; }

.text-center { text-align: center; }
.text-danger { color: var(--danger); }
.mt-10 { margin-top: 10px; }
.mt-20 { margin-top: 20px; }
.mt-30 { margin-top: 30px; }
.mb-20 { margin-bottom: 20px; }
.p-20 { padding: 20px; }

/* Mobile responsive for admin */
@media (max-width: 1024px) {
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .admin-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
    .admin-sidebar { transform: translateX(-100%); transition: transform 0.3s; }
    .admin-sidebar.show { transform: translateX(0); }
    .admin-main { margin-left: 0; }
    .sidebar-toggle { display: block; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
    .page-header { flex-direction: column; gap: 12px; align-items: flex-start; }
    .data-table { display: block; overflow-x: auto; }
    .form-row { flex-direction: column; gap: 0; }
}