/* ========== 全局样式 ========== */
:root {
    --bg-main: #f0f4f8;
    --bg-card: #ffffff;
    --bg-card-hover: #f8fafc;
    --border-color: #dde4ea;
    --text-primary: #1a202c;
    --text-secondary: #5a6b7c;
    --accent-blue: #2563eb;
    --accent-blue-light: #eff6ff;
    --accent-green: #059669;
    --accent-green-light: #ecfdf5;
    --accent-red: #dc2626;
    --accent-red-light: #fef2f2;
    --accent-orange: #d97706;
    --accent-purple: #7c3aed;
    --accent-purple-light: #f5f3ff;
    --accent-cyan: #0891b2;
    --gradient-header: #1e293b;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --radius: 12px;
}

* {
    transition: all 0.25s ease;
}

body {
    background: var(--bg-main);
    color: var(--text-primary);
    font-family: 'Segoe UI', 'Microsoft YaHei', pingfang SC, helvetica neue, sans-serif;
    min-height: 100vh;
}

/* ========== 导航栏 ========== */
.navbar {
    background: #6b7280 !important;
    border-bottom: 1px solid #9ca3af;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.navbar .nav-link {
    color: rgba(255, 255, 255, 0.7) !important;
    font-size: 0.85rem;
}

.navbar .nav-link:hover {
    color: #ffffff !important;
}

.navbar-brand {
    font-size: 1.2rem;
    font-weight: 600;
    color: #ffffff !important;
    letter-spacing: 0.5px;
}

.brand-text {
    color: #ffffff;
}

/* ========== Tab 样式 ========== */
.custom-tabs {
    border-bottom: 2px solid var(--border-color);
    flex-wrap: wrap;
    background: var(--bg-card);
    border-radius: 10px 10px 0 0;
    padding: 0.3rem 0.5rem 0 0.5rem;
    box-shadow: var(--shadow-sm);
}

.custom-tabs .nav-link {
    color: var(--text-secondary) !important;
    border: none !important;
    padding: 0.7rem 1.2rem;
    border-radius: 8px 8px 0 0 !important;
    font-size: 0.9rem;
    font-weight: 500;
    background: transparent !important;
}

.custom-tabs .nav-link:hover {
    color: var(--accent-blue) !important;
    background: var(--accent-blue-light) !important;
}

.custom-tabs .nav-link.active {
    color: var(--accent-blue) !important;
    background: #ffffff !important;
    border-bottom: 3px solid var(--accent-blue) !important;
    font-weight: 600;
}

/* ========== 卡片样式 ========== */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    margin-bottom: 1rem;
}

.card:hover {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.card-header {
    background: #fafbfc;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    font-weight: 600;
    padding: 0.65rem 1.2rem;
    border-radius: 12px 12px 0 0 !important;
    font-size: 0.9rem;
}

.card-body {
    padding: 1.2rem;
    color: var(--text-primary);
}

.stat-card {
    border-left: 4px solid var(--accent-blue);
}

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

/* ========== 表单元素 ========== */
.form-control {
    background: #ffffff;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 8px;
    padding: 0.8rem 1rem;
    font-size: 0.95rem;
}

.form-control:focus {
    background: #ffffff;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 0.25rem rgba(37, 99, 235, 0.15);
    color: var(--text-primary);
}

.form-control::placeholder {
    color: #94a3b8;
}

textarea {
    resize: vertical;
}

/* ========== 按钮 ========== */
.btn {
    border-radius: 8px;
    padding: 0.6rem 1.5rem;
    font-weight: 500;
    transition: all 0.2s;
}

.btn-primary {
    background: var(--accent-blue);
    border-color: var(--accent-blue);
}

.btn-primary:hover {
    background: #1d4ed8;
    border-color: #1d4ed8;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.35);
}

.btn-success { background: var(--accent-green); border-color: var(--accent-green); }
.btn-success:hover { background: #047857; border-color: #047857; }
.btn-danger { background: var(--accent-red); border-color: var(--accent-red); }
.btn-danger:hover { background: #b91c1c; border-color: #b91c1c; }

.btn-outline-secondary {
    color: var(--text-secondary);
    border-color: var(--border-color);
}

.btn-outline-secondary:hover {
    background: #f1f5f9;
    color: var(--text-primary);
}

.btn-outline-info {
    color: var(--accent-cyan);
    border-color: var(--accent-cyan);
    background: #ffffff;
}

.btn-outline-info:hover {
    background: rgba(8, 145, 178, 0.08);
}

/* ========== 示例标记 ========== */
.example-badge {
    cursor: pointer;
    margin: 2px;
    font-size: 0.85rem;
    padding: 0.4em 0.8em;
}

.example-badge:hover {
    transform: scale(1.05);
    opacity: 0.85;
}

/* ========== 预测结果 ========== */
#resultCard {
    border: 2px solid var(--accent-blue);
    animation: fadeInUp 0.5s;
}

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

/* ========== 新闻列表 ========== */
.news-item {
    padding: 0.8rem 1rem;
    border-bottom: 1px solid var(--border-color);
    border-radius: 6px;
    margin-bottom: 4px;
    cursor: pointer;
    background: #ffffff;
}

.news-item:hover {
    background: #f8fafc;
}

.news-item.positive {
    border-left: 3px solid var(--accent-green);
}

.news-item.negative {
    border-left: 3px solid var(--accent-red);
}

.news-item.neutral {
    border-left: 3px solid #94a3b8;
}

/* ========== 上传区域 ========== */
.upload-zone {
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    background: #fafbfc;
}

.upload-zone:hover {
    border-color: var(--accent-blue);
    background: var(--accent-blue-light);
}

/* ========== 模型架构图 ========== */
.model-architecture {
    text-align: center;
}

.arch-layer {
    background: #f8fafc;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 0.8rem;
    margin: 2px 0;
    font-size: 0.85rem;
    color: var(--text-primary);
}

.arch-bert {
    background: var(--accent-purple-light);
    border-color: #c4b5fd;
}

.arch-arrow {
    font-size: 1.2rem;
    margin: 2px 0;
    color: var(--text-secondary);
}

/* ========== 页脚 ========== */
footer {
    border-top: 1px solid var(--border-color);
    background: #ffffff;
    color: var(--text-secondary);
}

/* ========== 滚动条 ========== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f5f9;
}

::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-blue);
}

/* ========== 表格 ========== */
.table {
    color: var(--text-primary);
    --bs-table-bg: #ffffff;
    --bs-table-hover-bg: #f8fafc;
    --bs-table-striped-bg: #f8fafc;
}

.table-hover tbody tr:hover {
    background: #f1f5f9;
}

.table thead th {
    border-bottom: 2px solid var(--border-color);
    color: var(--accent-blue);
    background: #f8fafc;
}

.table td, .table th {
    border-color: var(--border-color);
}

/* ========== 进度条 ========== */
.progress {
    background: #e2e8f0;
    border-radius: 10px;
}

.progress-bar {
    font-weight: 600;
    font-size: 0.85rem;
}

/* ========== Badge ========== */
.badge {
    font-weight: 500;
    padding: 0.4em 0.8em;
}

/* ========== 分页 ========== */
.page-link {
    color: var(--accent-blue);
    background: #ffffff;
    border-color: var(--border-color);
}

.page-link:hover {
    background: var(--accent-blue-light);
    color: #1d4ed8;
}

.page-item.active .page-link {
    background: var(--accent-blue);
    border-color: var(--accent-blue);
    color: #ffffff;
}

.page-item.disabled .page-link {
    color: #94a3b8;
    background: #f8fafc;
}

/* ========== ECharts 容器 ========== */
[id$="Chart"] {
    width: 100%;
}

/* ========== 响应式设计 ========== */
@media (max-width: 768px) {
    .card-body { padding: 0.8rem; }
    .navbar-brand { font-size: 1rem; }
    .custom-tabs .nav-link { padding: 0.5rem 0.8rem; font-size: 0.8rem; }
}

/* ========== 加载动画 ========== */
.loading-spinner {
    text-align: center;
    padding: 2rem;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #e2e8f0;
    border-top: 4px solid var(--accent-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

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

/* ========== 脉冲动画 ========== */
.pulse-green {
    animation: pulseGreen 2s infinite;
}

@keyframes pulseGreen {
    0%, 100% { box-shadow: 0 0 0 0 rgba(5, 150, 105, 0.5); }
    50% { box-shadow: 0 0 0 15px rgba(5, 150, 105, 0); }
}

.pulse-red {
    animation: pulseRed 2s infinite;
}

@keyframes pulseRed {
    0%, 100% { box-shadow: 0 0 0 0 rgba(220, 38, 38, 0.5); }
    50% { box-shadow: 0 0 0 15px rgba(220, 38, 38, 0); }
}

/* ========== Tag 标签 ========== */
.tag {
    display: inline-block;
    padding: 0.2em 0.7em;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    margin: 2px;
}

.tag-positive { background: var(--accent-green-light); color: #065f46; }
.tag-negative { background: var(--accent-red-light); color: #991b1b; }
.tag-neutral  { background: #f1f5f9; color: #475569; }

/* ========== Alert 样式 ========== */
.alert {
    border-radius: 10px;
    border: 1px solid transparent;
}

.alert-info {
    background: #eff6ff;
    border-color: #bfdbfe;
    color: #1e40af;
}

.alert-success {
    background: #ecfdf5;
    border-color: #a7f3d0;
    color: #065f46;
}