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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: #f5f7fa;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.header h1 {
    font-size: 1.8rem;
}

.nav {
    margin-top: 0.5rem;
}

.nav a {
    color: white;
    text-decoration: none;
    margin-right: 1.5rem;
    opacity: 0.9;
    transition: opacity 0.3s;
}

.nav a:hover, .nav a.active {
    opacity: 1;
}

.login-container {
    max-width: 400px;
    margin: 100px auto;
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.login-container h2 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: #667eea;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    outline: none;
    border-color: #667eea;
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.3s;
    text-decoration: none;
}

.btn:hover {
    background: #5a6fd6;
}

.btn-success {
    background: #28a745;
}

.btn-success:hover {
    background: #218838;
}

.btn-danger {
    background: #dc3545;
}

.btn-danger:hover {
    background: #c82333;
}

.btn-warning {
    background: #ffc107;
    color: #333;
}

.btn-warning:hover {
    background: #e0a800;
}

.btn-block {
    display: block;
    width: 100%;
}

.admin-layout {
    display: flex;
    min-height: calc(100vh - 70px);
}

.admin-sidebar {
    width: 250px;
    background: #2c3e50;
    color: white;
    padding: 1rem 0;
}

.admin-sidebar ul {
    list-style: none;
}

.admin-sidebar li a {
    display: block;
    padding: 1rem 1.5rem;
    color: #ecf0f1;
    text-decoration: none;
    transition: background 0.3s;
}

.admin-sidebar li a:hover, .admin-sidebar li a.active {
    background: #34495e;
}

.admin-content {
    flex: 1;
    padding: 2rem;
}

.card {
    background: white;
    border-radius: 10px;
    padding: 1.5rem;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    margin-bottom: 1.5rem;
}

.card h3 {
    margin-bottom: 1rem;
    color: #2c3e50;
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table th, .table td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid #eee;
}

.table th {
    background: #f8f9fa;
    font-weight: 600;
}

.table tr:hover {
    background: #f8f9fa;
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    border-radius: 3px;
    font-size: 0.85rem;
    font-weight: 500;
}

.badge-success {
    background: #d4edda;
    color: #155724;
}

.badge-warning {
    background: #fff3cd;
    color: #856404;
}

.badge-danger {
    background: #f8d7da;
    color: #721c24;
}

.badge-info {
    background: #d1ecf1;
    color: #0c5460;
}

.alert {
    padding: 1rem;
    border-radius: 5px;
    margin-bottom: 1rem;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-danger {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: white;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    text-align: center;
}

.stat-card h4 {
    color: #7f8c8d;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.stat-card .value {
    font-size: 2rem;
    font-weight: 700;
    color: #667eea;
}

.pagination {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 1rem;
}

.pagination a, .pagination span {
    padding: 0.5rem 1rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    text-decoration: none;
    color: #333;
}

.pagination a:hover, .pagination span.active {
    background: #667eea;
    color: white;
    border-color: #667eea;
}

.footer {
    background: #2c3e50;
    color: white;
    text-align: center;
    padding: 1.5rem 0;
    margin-top: 2rem;
}

.sales-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.sales-header h2 {
    margin: 0;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-info span {
    color: #666;
}

.qrcode-verify {
    max-width: 500px;
    margin: 2rem auto;
}

.qrcode-verify input {
    font-size: 1.2rem;
    padding: 1rem;
}

/* 排行榜样式 */
.table tr.rank-first {
    background: linear-gradient(135deg, #ffd700 0%, #ffed4a 100%);
}

.table tr.rank-first:hover {
    background: linear-gradient(135deg, #ffc107 0%, #ffdb58 100%);
}

.table tr.rank-second {
    background: linear-gradient(135deg, #c0c0c0 0%, #e8e8e8 100%);
}

.table tr.rank-second:hover {
    background: linear-gradient(135deg, #a8a8a8 0%, #d8d8d8 100%);
}

.table tr.rank-third {
    background: linear-gradient(135deg, #cd7f32 0%, #e4a853 100%);
}

.table tr.rank-third:hover {
    background: linear-gradient(135deg, #b87333 0%, #d4a053 100%);
}

.table tr.rank-first td,
.table tr.rank-second td,
.table tr.rank-third td {
    color: #333;
    font-weight: 500;
}