:root {
    --primary-color: #2563eb;
    --secondary-color: #f8fafc;
    --accent-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
}

body {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.container-fluid {
    padding: 2rem;
}

.card {
    border: none;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    backdrop-filter: blur(10px);
    background: rgba(255,255,255,0.95);
    transition: transform 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
}

.card-header {
    background: linear-gradient(135deg, var(--primary-color), #3b82f6);
    color: white;
    border-radius: 16px 16px 0 0 !important;
    padding: 1.5rem;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), #3b82f6);
    border: none;
    border-radius: 8px;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(37, 99, 235, 0.4);
}

.btn-success {
    background: linear-gradient(135deg, var(--accent-color), #059669);
    border: none;
    border-radius: 8px;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
}

.btn-warning {
    background: linear-gradient(135deg, var(--warning-color), #d97706);
    border: none;
    border-radius: 8px;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
}

.form-control {
    border-radius: 8px;
    border: 2px solid #e2e8f0;
    padding: 0.75rem;
    transition: all 0.3s ease;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(37, 99, 235, 0.25);
}

/* 主要板块导航样式 */
.nav-pills .nav-link {
    border-radius: 8px;
    font-weight: 600;
    margin-right: 0.5rem;
    transition: all 0.3s ease;
    position: relative;
}

.nav-pills .nav-link.active {
    background: var(--primary-color);
}

/* 主要板块导航 - 增强层级感 */
.main-section-nav .nav-pills .nav-link {
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.2);
    padding: 1rem 2rem;
    font-size: 1.1rem;
    margin: 0 1rem;
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.main-section-nav .nav-pills .nav-link:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.main-section-nav .nav-pills .nav-link.active {
    background: linear-gradient(135deg, #2563eb, #3b82f6);
    border-color: #2563eb;
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.3);
    transform: translateY(-2px);
}

/* 子功能导航 - 次级层级 */
.sub-section-nav .nav-pills .nav-link {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 0.75rem 1.5rem;
    font-size: 0.95rem;
    margin: 0 0.5rem;
    backdrop-filter: blur(5px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.sub-section-nav .nav-pills .nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-1px);
    box-shadow: 0 3px 12px rgba(0, 0, 0, 0.1);
}

.sub-section-nav .nav-pills .nav-link.active {
    background: linear-gradient(135deg, #059669, #10b981);
    border-color: #059669;
    box-shadow: 0 3px 12px rgba(5, 150, 105, 0.3);
    transform: translateY(-1px);
}

/* 板块内容区域样式 */
.section-content {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 16px;
    padding: 2rem;
    margin-top: 1rem;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* 层级指示器 */
.hierarchy-indicator {
    display: inline-block;
    width: 4px;
    height: 20px;
    background: linear-gradient(135deg, #2563eb, #3b82f6);
    border-radius: 2px;
    margin-right: 0.5rem;
    vertical-align: middle;
}

.hierarchy-indicator.sub {
    background: linear-gradient(135deg, #059669, #10b981);
    height: 16px;
}

.table {
    border-radius: 8px;
    overflow: hidden;
}

.table thead th {
    background: linear-gradient(135deg, #f8fafc, #e2e8f0);
    font-weight: 600;
    border: none;
    color: #475569;
}

.alert {
    border: none;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.progress {
    height: 8px;
    border-radius: 4px;
    background-color: #e2e8f0;
}

.progress-bar {
    border-radius: 4px;
}

.text-primary { color: var(--primary-color) !important; }
.text-success { color: var(--accent-color) !important; }
.text-warning { color: var(--warning-color) !important; }

/* 已完成月份高亮样式 */
.month-label-platform.bg-success,
.month-label-annual.bg-success {
    background: linear-gradient(135deg, #28a745 0%, #20c997 100%) !important;
    border-color: #28a745 !important;
    font-weight: 600;
    box-shadow: 0 2px 4px rgba(40, 167, 69, 0.3);
}

.month-label-platform.bg-secondary,
.month-label-annual.bg-secondary {
    background-color: #6c757d !important;
    opacity: 0.8;
}

.completed-status {
    animation: fadeIn 0.3s ease-in;
}

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

/* 下拉菜单样式优化 */
.dropdown-menu {
    max-height: 300px;
    overflow-y: auto;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.dropdown-item:hover {
    background-color: #f8f9fa;
    color: #28a745;
}

.dropdown-item:active {
    background-color: #28a745;
    color: white;
}

/* 已完成月份输入框对齐 */
#platformCompletedMonths > .row,
#annualCompletedMonths > .row {
    display: flex;
    align-items: flex-start;
}

#platformCompletedMonths .col-6,
#annualCompletedMonths .col-6 {
    display: flex;
    flex-direction: column;
}

#platformCompletedMonths .col-6 > small,
#annualCompletedMonths .col-6 > small {
    display: block;
    margin-bottom: 10px;
    font-weight: 600;
    color: #495057;
}

#platformCompletedMonths .col-6 > .row,
#annualCompletedMonths .col-6 > .row {
    flex: 1;
}

.completed-controls {
    width: 100%;
    margin-bottom: 15px;
}

.completed-controls .bg-light {
    border: 1px solid #dee2e6;
}

/* 确保月份输入框一致 */
.platform-completed,
.salary-completed,
.annual-platform-completed,
.annual-salary-completed {
    text-align: right;
}

#platformCompletedMonths .col-12,
#annualCompletedMonths .col-12 {
    padding: 0;
}
.text-danger { color: var(--danger-color) !important; }

.loading {
    display: none;
}

.spinner-border-sm {
    width: 1rem;
    height: 1rem;
}

.chart-container {
    position: relative;
    height: 400px;
    margin: 1rem 0;
}

.comparison-table {
    max-height: 500px;
    overflow-y: auto;
}

.highlight {
    background: linear-gradient(135deg, #fef3c7, #fbbf24);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

/* 汇算清缴板块样式 */
#settlement-section .card {
    background: rgba(255, 255, 255, 0.95);
    border: none;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

#settlement-section .card-header {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border-radius: 16px 16px 0 0 !important;
    padding: 1.5rem;
    border: none;
}

#settlement-section .nav-tabs .nav-link {
    color: #667eea;
    border-color: #dee2e6 #dee2e6 #fff;
}

#settlement-section .nav-tabs .nav-link.active {
    color: #495057;
    background-color: #fff;
    border-color: #dee2e6 #dee2e6 #fff;
}

#settlement-section .form-label {
    font-weight: 600;
    color: #495057;
    margin-bottom: 0.5rem;
}

#settlement-section .input-group-text {
    background-color: #f8f9fa;
    border-color: #dee2e6;
    color: #667eea;
}

#settlement-section .accordion-button {
    background-color: #f8f9fa;
    color: #495057;
}

#settlement-section .accordion-button:not(.collapsed) {
    background-color: #e9ecef;
    color: #667eea;
}

#settlement-section .alert-info {
    background: rgba(255, 255, 255, 0.7);
    border: 1px solid rgba(102, 126, 234, 0.2);
    border-radius: 12px;
    color: #6b7280;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    backdrop-filter: blur(5px);
    padding: 1rem 1.25rem;
}

#settlement-section .alert-info .alert-heading {
    color: #4b5563;
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 0.75rem;
}

#settlement-section .alert-info .alert-heading i {
    color: #6b7280;
    margin-right: 0.5rem;
    font-size: 0.9rem;
}

#settlement-section .alert-info ul {
    color: #6b7280;
    line-height: 1.5;
    font-size: 0.9rem;
    margin-bottom: 0;
}

#settlement-section .alert-info ul li {
    margin-bottom: 0.4rem;
    padding-left: 0.25rem;
}

#settlement-section .alert-info ul li strong {
    color: #4b5563;
    font-weight: 600;
}

#settlement-section .table {
    color: #495057;
}

#settlement-section .table-striped > tbody > tr:nth-of-type(odd) > * {
    background-color: rgba(102, 126, 234, 0.05);
}

/* 结果卡片样式 */
#settlementCalcResult .card,
#platformOptimizeResult .card,
#annualOptimizeResult .card {
    margin-top: 2rem;
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}