/* 回测对比系统样式 */

:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --success-color: #56ab2f;
    --warning-color: #f57c00;
    --danger-color: #c62828;
    --info-color: #1565c0;
    --light-bg: #f8f9fa;
    --card-shadow: 0 5px 15px rgba(0,0,0,0.08);
    --card-shadow-hover: 0 8px 25px rgba(0,0,0,0.12);
    --border-radius: 15px;
    --transition: all 0.3s ease;
}

body {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    min-height: 100vh;
    position: relative;
    color: #2c3e50; /* 添加默认文字颜色，提高对比度 */
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="1" fill="%23ffffff" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    pointer-events: none;
    z-index: -1;
}

.navbar-brand {
    font-weight: bold;
    font-size: 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: var(--transition);
    text-shadow: 0 1px 2px rgba(0,0,0,0.1); /* 添加文字阴影 */
}

.navbar-brand:hover {
    transform: scale(1.05);
    filter: brightness(1.1); /* 悬停时增加亮度 */
}

.navbar {
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.95) !important; /* 增加不透明度 */
    box-shadow: 0 2px 20px rgba(0,0,0,0.15); /* 增强阴影 */
    border-bottom: 1px solid rgba(0,0,0,0.1); /* 添加底部边框 */
}

.navbar-nav .nav-link {
    position: relative;
    font-weight: 600; /* 加粗字体 */
    transition: var(--transition);
    color: #1a252f !important; /* 深色文字，提高对比度 */
    text-shadow: 0 1px 1px rgba(0,0,0,0.1); /* 添加文字阴影 */
}

.navbar-nav .nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    transition: var(--transition);
    transform: translateX(-50%);
}

.navbar-nav .nav-link:hover::after,
.navbar-nav .nav-link.active::after {
    width: 100%;
}

.navbar-nav .nav-link:hover {
    color: #0056b3 !important; /* 悬停时使用深蓝色 */
    text-shadow: 0 1px 2px rgba(0,0,0,0.2); /* 悬停时增强阴影 */
}

.navbar-nav .nav-link.active {
    color: #0056b3 !important; /* 激活状态使用深蓝色 */
    font-weight: 700; /* 激活状态加粗 */
    text-shadow: 0 1px 2px rgba(0,0,0,0.2);
}

.feature-card {
    padding: 2rem 1rem;
    text-align: center;
    border-radius: var(--border-radius);
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
    transition: var(--transition);
}

.feature-card:hover::before {
    left: 100%;
}

.feature-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 20px 40px rgba(0,0,0,0.15);
    border-color: var(--primary-color);
}

.feature-card i {
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 3rem;
}

.card {
    border: none;
    border-radius: var(--border-radius);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(15px);
    box-shadow: var(--card-shadow);
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color), var(--primary-color));
    background-size: 200% 100%;
    animation: gradient-shift 3s ease-in-out infinite;
}

@keyframes gradient-shift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--card-shadow-hover);
    border-color: var(--primary-color);
}

.card-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 15px 15px 0 0 !important;
    border: none;
}

.card-header h3 {
    margin: 0;
    font-weight: 600;
}

.form-control, .form-select {
    border-radius: 12px;
    border: 2px solid rgba(102, 126, 234, 0.2);
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(5px);
    transition: var(--transition);
    padding: 0.75rem 1rem;
    font-size: 0.95rem;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.3rem rgba(102, 126, 234, 0.2);
    background: rgba(255, 255, 255, 0.95);
    transform: translateY(-2px);
}

.form-control:hover, .form-select:hover {
    border-color: var(--primary-color);
    transform: translateY(-1px);
}

.form-label {
    font-weight: 600;
    color: #495057;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn {
    border-radius: 12px;
    font-weight: 600;
    padding: 0.875rem 2rem;
    transition: var(--transition);
    border: none;
    position: relative;
    overflow: hidden;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 0.9rem;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: var(--transition);
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color) 0%, #a8e6cf 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(86, 171, 47, 0.3);
}

.btn-success:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(86, 171, 47, 0.4);
}

.btn-outline-secondary {
    border: 2px solid #6c757d;
    color: #6c757d;
    background: transparent;
}

.btn-outline-secondary:hover {
    background: #6c757d;
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(108, 117, 125, 0.4);
}

.progress {
    height: 12px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    overflow: hidden;
}

.progress-bar {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border-radius: 8px;
    position: relative;
    overflow: hidden;
}

.progress-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    animation: progress-shine 2s ease-in-out infinite;
}

@keyframes progress-shine {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.results-table {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(15px);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--card-shadow);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.results-table th {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    border: none;
    padding: 1.25rem 1rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 0.9rem;
}

.results-table td {
    padding: 1.25rem 1rem;
    border-bottom: 1px solid rgba(102, 126, 234, 0.1);
    vertical-align: middle;
    transition: var(--transition);
}

.results-table tr:hover {
    background: rgba(102, 126, 234, 0.05);
    transform: scale(1.01);
}

.results-table tr:hover td {
    color: var(--primary-color);
    font-weight: 500;
}

.metric-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(15px);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--card-shadow);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-left: 4px solid var(--primary-color);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.metric-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--primary-color), var(--secondary-color));
    transition: var(--transition);
}

.metric-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--card-shadow-hover);
    border-color: var(--primary-color);
}

.metric-card:hover::before {
    width: 8px;
}

.metric-card h5 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 1rem;
}

.metric-value {
    font-size: 2rem;
    font-weight: bold;
    color: #333;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.metric-label {
    color: #666;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.comparison-chart {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(15px);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--card-shadow);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition);
}

.comparison-chart:hover {
    transform: translateY(-3px);
    box-shadow: var(--card-shadow-hover);
}

.alert {
    border-radius: var(--border-radius);
    border: none;
    padding: 1.25rem 1.5rem;
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.alert::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    transition: var(--transition);
}

.alert:hover {
    transform: translateY(-2px);
    box-shadow: var(--card-shadow);
}

.alert-info {
    background: linear-gradient(135deg, rgba(227, 242, 253, 0.9), rgba(187, 222, 251, 0.9));
    color: var(--info-color);
    border: 1px solid rgba(21, 101, 192, 0.2);
}

.alert-info::before {
    background: var(--info-color);
}

.alert-success {
    background: linear-gradient(135deg, rgba(232, 245, 232, 0.9), rgba(200, 230, 201, 0.9));
    color: var(--success-color);
    border: 1px solid rgba(46, 125, 50, 0.2);
}

.alert-success::before {
    background: var(--success-color);
}

.alert-warning {
    background: linear-gradient(135deg, rgba(255, 248, 225, 0.9), rgba(255, 236, 179, 0.9));
    color: var(--warning-color);
    border: 1px solid rgba(245, 124, 0, 0.2);
}

.alert-warning::before {
    background: var(--warning-color);
}

.alert-danger {
    background: linear-gradient(135deg, rgba(255, 235, 238, 0.9), rgba(255, 205, 210, 0.9));
    color: var(--danger-color);
    border: 1px solid rgba(198, 40, 40, 0.2);
}

.alert-danger::before {
    background: var(--danger-color);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .feature-card {
        margin-bottom: 2rem;
    }
    
    .btn {
        width: 100%;
        margin-bottom: 0.5rem;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .metric-card {
        padding: 1.5rem;
    }
    
    .metric-value {
        font-size: 1.5rem;
    }
    
    .comparison-chart {
        padding: 1.5rem;
    }
}

@media (max-width: 576px) {
    .container-fluid {
        padding: 0 1rem;
    }
    
    .card-header h3 {
        font-size: 1.25rem;
    }
    
    .display-4 {
        font-size: 2rem;
    }
    
    .lead {
        font-size: 1rem;
    }
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

.slide-in-left {
    animation: slideInLeft 0.6s ease-out;
}

.slide-in-right {
    animation: slideInRight 0.6s ease-out;
}

.pulse {
    animation: pulse 2s ease-in-out infinite;
}

/* 页面加载动画 */
.page-section {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s ease-out forwards;
}

.page-section:nth-child(1) { animation-delay: 0.1s; }
.page-section:nth-child(2) { animation-delay: 0.2s; }
.page-section:nth-child(3) { animation-delay: 0.3s; }
.page-section:nth-child(4) { animation-delay: 0.4s; }
.page-section:nth-child(5) { animation-delay: 0.5s; }

/* 加载动画 */
.spinner-border {
    width: 3rem;
    height: 3rem;
}

/* 表格响应式 */
@media (max-width: 768px) {
    .results-table {
        font-size: 0.9rem;
    }
    
    .results-table th,
    .results-table td {
        padding: 0.5rem;
    }
}

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 5px;
    backdrop-filter: blur(5px);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 5px;
    border: 2px solid rgba(255, 255, 255, 0.1);
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
}

/* 特殊效果 */
.glass-effect {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.floating-card {
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

/* 策略选择器样式 */
.strategy-selector {
    position: relative;
    overflow: hidden;
}

.strategy-selector::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(102, 126, 234, 0.1), transparent);
    transition: var(--transition);
}

.strategy-selector:hover::before {
    left: 100%;
}

/* 结果展示区域 */
.results-container {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9), rgba(240, 248, 255, 0.9));
    border-radius: var(--border-radius);
    padding: 2rem;
    margin-top: 2rem;
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

/* 加载状态样式 */
.loading-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem;
    color: var(--primary-color);
}

.loading-state .spinner-border {
    margin-bottom: 1rem;
}

/* 成功状态样式 */
.success-state {
    background: linear-gradient(135deg, rgba(76, 175, 80, 0.1), rgba(129, 199, 132, 0.1));
    border: 1px solid rgba(76, 175, 80, 0.3);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin: 1rem 0;
}

/* 错误状态样式 */
.error-state {
    background: linear-gradient(135deg, rgba(244, 67, 54, 0.1), rgba(239, 154, 154, 0.1));
    border: 1px solid rgba(244, 67, 54, 0.3);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin: 1rem 0;
}

/* 表格样式 */
.table {
    color: #2c3e50;
}

.table th {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    font-weight: 600;
    border: none;
}

.table td {
    border-color: rgba(0,0,0,0.1);
    color: #2c3e50;
}

/* 列表样式 */
.list-group-item {
    background: rgba(255, 255, 255, 0.9);
    border-color: rgba(0,0,0,0.1);
    color: #2c3e50;
}

.list-group-item strong {
    color: var(--primary-color);
    font-weight: 600;
}

/* 段落和文字样式 */
p, li {
    color: #2c3e50;
    line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
    color: #1a252f;
    font-weight: 600;
}

/* 确保所有文字元素都有足够的对比度 */
.text-muted {
    color: #6c757d !important;
}

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

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

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

.text-danger {
    color: var(--danger-color) !important;
}

.text-info {
    color: var(--info-color) !important;
}

/* 表单文本提示 */
.form-text {
    color: #6c757d;
    font-size: 0.85rem;
}

/* 卡片内容文字 */
.card-body {
    color: #2c3e50;
}

/* 模态框文字 */
.modal-content {
    color: #2c3e50;
}

.modal-title {
    color: #1a252f;
    font-weight: 600;
}

/* 加载提示文字 */
.spinner-border + h5 {
    color: #1a252f;
}

.spinner-border + h5 + p {
    color: #6c757d;
}

/* 响应式设计 - 确保对比度 */
@media (max-width: 768px) {
    .navbar-nav .nav-link {
        color: #2c3e50 !important;
        font-weight: 600;
        padding: 0.75rem 1rem;
        border-bottom: 1px solid rgba(0,0,0,0.1);
    }
    
    .navbar-nav .nav-link:hover,
    .navbar-nav .nav-link.active {
        background: rgba(102, 126, 234, 0.1);
        color: var(--primary-color) !important;
    }
    
    .card-header h3 {
        font-size: 1.25rem;
        color: white;
    }
    
    .feature-card h4 {
        color: #1a252f;
        font-weight: 600;
    }
    
    .feature-card p {
        color: #2c3e50;
    }
}

@media (max-width: 576px) {
    .navbar-brand {
        font-size: 1.25rem;
        color: var(--primary-color) !important;
        -webkit-text-fill-color: var(--primary-color) !important;
    }
    
    .display-4 {
        font-size: 2rem;
        color: var(--primary-color);
    }
    
    .lead {
        color: #2c3e50;
        font-size: 1rem;
    }
}