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

:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --secondary-color: #8b5cf6;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --text-color: #1f2937;
    --text-light: #6b7280;
    --bg-color: #f9fafb;
    --card-bg: #ffffff;
    --border-color: #e5e7eb;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    background-attachment: fixed;
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
}

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

header {
    background: var(--card-bg);
    padding: 24px;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    margin-bottom: 24px;
    backdrop-filter: blur(10px);
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 15px;
}

header h1 {
    font-size: 32px;
    font-weight: 700;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-light);
    font-size: 14px;
}

.btn-text {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 6px 16px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 14px;
}

.btn-text:hover {
    background: var(--bg-color);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.tabs {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 10px 20px;
    border: none;
    background: transparent;
    color: var(--text-light);
    cursor: pointer;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 500;
    transition: all 0.3s;
    position: relative;
}

.tab-btn:hover {
    background: var(--bg-color);
    color: var(--text-color);
}

.tab-btn.active {
    background: var(--gradient);
    color: white;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.tab-content {
    display: none;
    animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.tab-content.active {
    display: block;
}

.card {
    background: var(--card-bg);
    padding: 28px;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    margin-bottom: 24px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.8);
}

.card h2 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--text-color);
    padding-bottom: 12px;
    border-bottom: 2px solid var(--border-color);
}

.form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-weight: 500;
    color: var(--text-color);
    font-size: 14px;
}

.form-group input,
.form-group select {
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    font-size: 15px;
    transition: all 0.3s;
    background: var(--card-bg);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-primary {
    background: var(--gradient);
    color: white;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.btn-secondary {
    background: var(--secondary-color);
    color: white;
    margin-right: 10px;
    margin-bottom: 10px;
}

.btn-secondary:hover {
    background: #7c3aed;
    transform: translateY(-2px);
}

.btn-danger {
    background: var(--danger-color);
    color: white;
    padding: 8px 16px;
    font-size: 14px;
}

.btn-danger:hover {
    background: #dc2626;
    transform: translateY(-2px);
}

.btn-success {
    background: var(--success-color);
    color: white;
    padding: 8px 16px;
    font-size: 14px;
}

.btn-success:hover {
    background: #059669;
    transform: translateY(-2px);
}

.btn-block {
    width: 100%;
}

.list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.list-item {
    padding: 20px;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    background: var(--bg-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
    transition: all 0.3s;
}

.list-item:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow);
    transform: translateY(-2px);
}

.list-item-info {
    flex: 1;
    min-width: 200px;
}

.list-item-info strong {
    color: var(--primary-color);
    display: block;
    margin-bottom: 8px;
    font-size: 16px;
}

.list-item-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.badge {
    display: inline-block;
    padding: 6px 12px;
    border-radius: 8px;
    font-size: 12px;
    font-weight: 600;
}

.badge-success {
    background: #d1fae5;
    color: #065f46;
}

.badge-warning {
    background: #fef3c7;
    color: #92400e;
}

.table-container {
    overflow-x: auto;
    margin-top: 20px;
    border-radius: 12px;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
    background: var(--card-bg);
}

table th,
table td {
    padding: 14px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

table th {
    background: var(--bg-color);
    font-weight: 600;
    color: var(--text-color);
    position: sticky;
    top: 0;
}

table tr:hover {
    background: var(--bg-color);
}

table tr:last-child td {
    border-bottom: none;
}

.report-controls,
.report-tabs {
    margin-bottom: 20px;
}

.report-content {
    margin-top: 20px;
}

.stat-card {
    background: var(--gradient);
    color: white;
    padding: 28px;
    border-radius: 16px;
    margin-bottom: 20px;
    box-shadow: var(--shadow-lg);
}

.stat-card h3 {
    font-size: 16px;
    margin-bottom: 12px;
    opacity: 0.9;
    font-weight: 500;
}

.stat-card .value {
    font-size: 36px;
    font-weight: 700;
}

.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 24px;
}

.stat-grid > div {
    background: rgba(255, 255, 255, 0.1);
    padding: 16px;
    border-radius: 12px;
    backdrop-filter: blur(10px);
}

/* 登录页面样式 */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-card {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 400px;
    backdrop-filter: blur(10px);
}

.login-card h1 {
    text-align: center;
    font-size: 32px;
    font-weight: 700;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.login-subtitle {
    text-align: center;
    color: var(--text-light);
    margin-bottom: 32px;
    font-size: 14px;
}

.login-form {
    margin-top: 24px;
}

.error-message {
    color: var(--danger-color);
    font-size: 14px;
    margin-top: 12px;
    text-align: center;
    padding: 8px;
    background: #fee2e2;
    border-radius: 8px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 12px;
    }

    header {
        padding: 20px;
    }

    header h1 {
        font-size: 24px;
    }

    .header-top {
        flex-direction: column;
        align-items: flex-start;
    }

    .tabs {
        width: 100%;
    }

    .tab-btn {
        flex: 1;
        min-width: 0;
    }

    .card {
        padding: 20px;
    }

    .list-item {
        flex-direction: column;
        align-items: flex-start;
    }

    .list-item-actions {
        width: 100%;
        justify-content: flex-end;
    }

    table {
        font-size: 12px;
    }

    table th,
    table td {
        padding: 10px;
    }

    .stat-grid {
        grid-template-columns: 1fr;
    }

    .login-card {
        padding: 28px;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 20px;
    }

    .card h2 {
        font-size: 18px;
    }

    .btn {
        padding: 10px 16px;
        font-size: 14px;
    }

    .stat-card .value {
        font-size: 28px;
    }
}

/* 加载动画 */
.loading {
    text-align: center;
    padding: 40px;
    color: var(--text-light);
}

.empty {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-light);
}

.empty::before {
    content: "📋";
    display: block;
    font-size: 48px;
    margin-bottom: 16px;
}