/* 全局重置和基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #000000;  /* 纯黑色文字确保最高对比度 */
    background: #f8f9fa;  /* 浅灰背景增加层次感 */
    min-height: 100vh;
}

/* 导航栏 */
.navbar {
    background: #ffffff;
    border-bottom: 1px solid #e5e5e5;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 0 2rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    height: 60px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.4rem;
    font-weight: 700;
    color: #000000;  /* 纯黑色确保清晰 */
}

.nav-menu {
    display: flex;
    gap: 1rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    text-decoration: none;
    color: #333333;  /* 深灰色确保在白底上清晰可见 */
    border-radius: 6px;
    transition: all 0.2s ease;
    font-weight: 500;
    font-size: 0.9rem;
}

.nav-link:hover, .nav-link.active {
    background: #f0f0f0;
    color: #000000;  /* 悬停时变为纯黑 */
}

/* 主容器 */
.main-container {
    margin-top: 80px;
    padding: 2rem;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

/* 页面标题 */
.page-header {
    text-align: center;
    margin-bottom: 3rem;
    color: #000000;  /* 标题用纯黑色 */
}

.page-header h1 {
    font-size: 2.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
    color: #000000;  /* 确保标题清晰 */
}

.page-header p {
    font-size: 1rem;
    color: #444444;  /* 副标题用深灰色 */
    max-width: 600px;
    margin: 0 auto;
}

/* 卡片样式 */
.card {
    background: #fafafa;  /* 更浅的背景色 */
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);  /* 更轻的阴影 */
    border: 1px solid #f0f0f0;  /* 更浅的边框 */
    transition: box-shadow 0.2s ease;
}

.card:hover {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);  /* 悬停时稍微深一点 */
}

.card-header {
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #f0f0f0;
}

.card-header h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: #000000;  /* 卡片标题用纯黑色 */
}

/* 表单样式 */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

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

.form-group label {
    font-weight: 600;
    color: #000000;  /* 表单标签用纯黑色 */
    margin-bottom: 6px;
    font-size: 0.9rem;
}

.form-input, .form-select {
    padding: 10px 12px;
    border: 1px solid #ccc;  /* 更深的边框确保可见 */
    border-radius: 6px;
    font-size: 0.9rem;
    transition: border-color 0.2s ease;
    background: #ffffff;
    color: #000000;  /* 输入文字用纯黑色 */
}

.form-input:focus, .form-select:focus {
    outline: none;
    border-color: #000000;  /* 聚焦时黑色边框 */
}

.form-range {
    width: 100%;
    height: 8px;
    border-radius: 5px;
    background: #e2e8f0;
    outline: none;
    -webkit-appearance: none;
    margin-bottom: 8px;
}

.form-range::-webkit-slider-thumb {
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: #000000;  /* 纯黑色 */
    cursor: pointer;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);  /* 简单阴影 */
}

.form-range::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: #000000;  /* 纯黑色 */
    cursor: pointer;
    border: none;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);  /* 简单阴影 */
}

.range-value {
    font-weight: 600;
    color: #000000;  /* 纯黑色 */
    text-align: center;
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    justify-content: center;
}

.btn-primary {
    background: #1a1a1a;
    color: #ffffff;
}

.btn-primary:hover {
    background: #333333;
}

.btn-primary:active {
    background: #0d0d0d;
}

/* 指标卡片 */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.metric-card {
    background: #fafafa;  /* 与主卡片保持一致的浅背景 */
    border-radius: 8px;
    padding: 1.5rem;
    text-align: center;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);  /* 更轻的阴影 */
    border: 1px solid #f0f0f0;  /* 更浅的边框 */
    transition: box-shadow 0.2s ease;
}

.metric-card:hover {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);  /* 悬停时稍微深一点 */
}

.metric-icon {
    font-size: 1.8rem;
    margin-bottom: 0.8rem;
}

.metric-value {
    font-size: 1.6rem;
    font-weight: 700;
    color: #000000;  /* 指标数值用纯黑色 */
    margin-bottom: 0.3rem;
}

.metric-label {
    color: #333333;  /* 指标标签用深灰色 */
    font-weight: 500;
    font-size: 0.9rem;
}

/* 图表容器 */
.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.chart-container {
    background: #fafafa;  /* 与其他卡片保持一致 */
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);  /* 更轻的阴影 */
    border: 1px solid #f0f0f0;  /* 更浅的边框 */
}

/* 对比网格 */
.comparison-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

/* 表格样式 */
.data-table {
    width: 100%;
    border-collapse: collapse;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
    margin-bottom: 2rem;
    border: 1px solid #e5e5e5;
}

.data-table th {
    background: #000000;  /* 表头用纯黑背景 */
    color: #ffffff;
    padding: 12px 16px;
    text-align: left;
    font-weight: 600;
    font-size: 0.9rem;
}

.data-table td {
    padding: 12px 16px;
    border-bottom: 1px solid #f0f0f0;  /* 更浅的分隔线 */
    background: #fafafa;  /* 与卡片背景一致 */
    color: #000000;  /* 表格内容用纯黑色 */
    font-size: 0.9rem;
}

.data-table tr:hover td {
    background: #f0f0f0;  /* 悬停时稍微深一点 */
    color: #000000;
}

/* 选项卡内容 */
.tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

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

.results-section {
    animation: slideUp 0.5s ease;
}

/* 加载动画 */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.95);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    color: #000000;  /* 加载文字用纯黑色 */
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid #e0e0e0;
    border-top: 3px solid #000000;  /* 旋转部分用黑色 */
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 1rem;
}

/* Toast 通知 */
#toast-container {
    position: fixed;
    top: 100px;
    right: 2rem;
    z-index: 3000;
}

.toast {
    background: #fafafa;  /* 与卡片背景一致 */
    padding: 12px 16px;
    border-radius: 6px;
    margin-bottom: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);  /* 稍微明显的阴影 */
    border: 1px solid #f0f0f0;  /* 与其他元素一致的边框 */
    border-left: 3px solid #000000;  /* 左边框用黑色 */
    animation: slideInRight 0.3s ease;
    max-width: 300px;
    font-size: 0.9rem;
    color: #000000;  /* Toast文字用纯黑色 */
}

.toast.success {
    border-left-color: #22c55e;
}

.toast.error {
    border-left-color: #ef4444;
}

.toast.warning {
    border-left-color: #f59e0b;
}

/* 动画 */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

@keyframes slideInRight {
    from { 
        opacity: 0; 
        transform: translateX(100%); 
    }
    to { 
        opacity: 1; 
        transform: translateX(0); 
    }
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .navbar {
        padding: 0 1rem;
    }
    
    .nav-container {
        height: 60px;
    }
    
    .nav-brand {
        font-size: 1.2rem;
    }
    
    .nav-menu {
        gap: 1rem;
    }
    
    .nav-link {
        padding: 8px 12px;
        font-size: 0.9rem;
    }
    
    .main-container {
        margin-top: 80px;
        padding: 1rem;
    }
    
    .page-header h1 {
        font-size: 2rem;
    }
    
    .page-header p {
        font-size: 1rem;
    }
    
    .card {
        padding: 1.5rem;
    }
    
    .form-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .charts-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .metrics-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .comparison-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    #toast-container {
        right: 1rem;
        left: 1rem;
        top: 80px;
    }
    
    .toast {
        max-width: none;
    }
}

@media (max-width: 480px) {
    .nav-menu {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .nav-link {
        padding: 6px 10px;
        font-size: 0.8rem;
    }
    
    .btn {
        padding: 12px 24px;
        font-size: 0.9rem;
    }
    
    .metric-value {
        font-size: 1.5rem;
    }
}

/* 综合分析页面特殊样式 */
.analysis-input-section {
    display: flex;
    align-items: flex-end;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
    padding: 1.5rem;
    background: #f8f9fa;
    border-radius: 10px;
    border: 1px solid #e9ecef;
}

.input-wrapper {
    flex: 1;
    min-width: 200px;
}

.input-wrapper label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #000000;
}

.input-hint {
    display: block;
    margin-top: 0.25rem;
    color: #6c757d;
    font-size: 0.875rem;
}

.analysis-btn {
    padding: 12px 24px !important;
    font-size: 1rem !important;
    font-weight: 600 !important;
    min-width: 180px;
    height: auto;
    white-space: nowrap;
    margin-top: 0;
}

.analysis-info {
    padding-top: 1rem;
    border-top: 1px solid #e9ecef;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-bottom: 1rem;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    background: #ffffff;
    border-radius: 8px;
    border: 1px solid #e9ecef;
    transition: all 0.2s ease;
}

.info-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    border-color: #000000;
}

.info-item i {
    font-size: 1.2rem;
    color: #000000;
    width: 20px;
    text-align: center;
}

.info-item span {
    font-weight: 600;
    color: #000000;
}

.analysis-desc {
    text-align: center;
    color: #6c757d;
    font-size: 0.9rem;
    margin: 0;
    font-style: italic;
}

/* 响应式适配 */
@media (max-width: 768px) {
    .analysis-input-section {
        flex-direction: column;
        align-items: stretch;
        gap: 1rem;
    }
    
    .input-wrapper {
        flex: none;
    }
    
    .analysis-btn {
        width: 100%;
    }
    
    .info-grid {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }
}

/* 股票筛选页面特殊样式 */
.screening-info-main {
    background: #f8f9fa;
    border-radius: 10px;
    padding: 1.5rem;
    border: 1px solid #e9ecef;
}

.screening-criteria {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

.criteria-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background: #ffffff;
    border-radius: 6px;
    border: 1px solid #e9ecef;
    font-weight: 500;
    color: #000000;
}

.criteria-item i {
    color: #007bff;
    font-size: 1rem;
}

.strategy-overview {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid #e9ecef;
}

.strategy-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-bottom: 1rem;
}

.strategy-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.25rem;
    background: #ffffff;
    border-radius: 8px;
    border: 1px solid #e9ecef;
    transition: all 0.2s ease;
}

.strategy-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    border-color: #000000;
}

.strategy-item i {
    font-size: 1.5rem;
    color: #000000;
    width: 24px;
    text-align: center;
}

.strategy-info h4 {
    margin: 0 0 0.25rem 0;
    font-size: 1rem;
    font-weight: 600;
    color: #000000;
}

.strategy-info p {
    margin: 0;
    font-size: 0.875rem;
    color: #6c757d;
}

@media (max-width: 768px) {
    .screening-criteria {
        flex-direction: column;
        gap: 0.75rem;
        align-items: center;
    }
    
    .criteria-item {
        width: 100%;
        justify-content: center;
    }
    
    .strategy-grid {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }
    
    .strategy-item {
        padding: 1rem;
    }
    
    .strategy-item i {
        font-size: 1.25rem;
    }
}