/* =====================================================
   量化策略网站 - 主样式表
   zhihuiwo.cn
   ===================================================== */

:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --success-color: #16a34a;
    --danger-color: #dc2626;
    --warning-color: #f59e0b;
    --bg-dark: #0f172a;
    --bg-card: #1e293b;
    --bg-card-hover: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border-color: #334155;
    --gradient-start: #2563eb;
    --gradient-end: #7c3aed;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* ========== 导航栏 ========== */
.navbar {
    background: linear-gradient(135deg, var(--bg-card), var(--border-color));
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.navbar-brand::before {
    content: "📊";
    font-size: 1.5rem;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 0.5rem;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    transition: all 0.3s ease;
    font-weight: 500;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary-color);
    background: rgba(37, 99, 235, 0.1);
}

/* ========== 主容器 ========== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.page-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.page-title::before {
    content: "";
    width: 4px;
    height: 28px;
    background: linear-gradient(180deg, var(--gradient-start), var(--gradient-end));
    border-radius: 2px;
}

/* ========== 统计卡片区域 ========== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.25rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
    overflow: hidden;
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.stat-card::after {
    content: "";
    position: absolute;
    top: 0;
    right: 0;
    width: 120px;
    height: 120px;
    background: radial-gradient(circle at top right, rgba(37, 99, 235, 0.15), transparent 70%);
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.stat-value {
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.stat-value.positive { color: var(--success-color); }
.stat-value.negative { color: var(--danger-color); }

.stat-change {
    font-size: 0.8rem;
    margin-top: 0.35rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.stat-change.up { color: var(--success-color); }
.stat-change.down { color: var(--danger-color); }

.stat-icon {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    font-size: 2rem;
    opacity: 0.15;
}

/* ========== 图表区域 ========== */
.chart-section {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    margin-bottom: 2rem;
}

.chart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.chart-title {
    font-size: 1.1rem;
    font-weight: 600;
}

.chart-container {
    position: relative;
    height: 350px;
    width: 100%;
}

/* ========== 交易记录表格 ========== */
.records-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    background: var(--bg-card);
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.records-table thead th {
    background: rgba(37, 99, 235, 0.08);
    padding: 1rem 1.25rem;
    text-align: left;
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--border-color);
}

.records-table tbody td {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
    transition: background 0.2s ease;
}

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

.records-table tbody tr:hover td {
    background: var(--bg-card-hover);
}

.profit-positive {
    color: var(--success-color);
    font-weight: 600;
}

.profit-negative {
    color: var(--danger-color);
    font-weight: 600;
}

.badge {
    display: inline-block;
    padding: 0.2rem 0.65rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-success {
    background: rgba(22, 163, 74, 0.15);
    color: var(--success-color);
}

.badge-danger {
    background: rgba(220, 38, 38, 0.15);
    color: var(--danger-color);
}

.badge-warning {
    background: rgba(245, 158, 11, 0.15);
    color: var(--warning-color);
}

/* ========== 日记录卡片 ========== */
.day-card {
    background: var(--bg-card);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    overflow: hidden;
    margin-bottom: 1.5rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.day-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.2);
}

.day-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 1.5rem;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(124, 58, 237, 0.05));
    border-bottom: 1px solid var(--border-color);
}

.day-date {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
}

.day-summary {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.day-profit {
    font-size: 1.25rem;
    font-weight: 800;
}

.day-body {
    padding: 1.25rem 1.5rem;
}

.round-list {
    list-style: none;
}

.round-item {
    display: grid;
    grid-template-columns: 80px repeat(5, 1fr);
    gap: 0.75rem;
    padding: 0.75rem 0;
    border-bottom: 1px dashed var(--border-color);
    align-items: center;
    font-size: 0.9rem;
}

.round-item:last-child {
    border-bottom: none;
}

.round-number {
    font-weight: 600;
    color: var(--primary-color);
}

.round-total {
    grid-column: 1 / -1;
    display: flex;
    justify-content: space-between;
    padding-top: 0.75rem;
    margin-top: 0.5rem;
    border-top: 2px solid var(--border-color);
    font-weight: 700;
    font-size: 0.95rem;
}

/* ========== 策略介绍区域 ========== */
.strategy-intro {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-top: 2rem;
}

.strategy-card {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 2rem;
    border: 1px solid var(--border-color);
}

.strategy-card h3 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.strategy-card p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 0.75rem;
}

.feature-list {
    list-style: none;
    margin-top: 1rem;
}

.feature-list li {
    padding: 0.5rem 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
}

.feature-list li::before {
    content: "✅";
    font-size: 0.9rem;
}

/* ========== 页脚 ========== */
.footer {
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
    font-size: 0.85rem;
    border-top: 1px solid var(--border-color);
    margin-top: 3rem;
}

.footer a {
    color: var(--primary-color);
    text-decoration: none;
}

/* ========== 响应式设计 ========== */
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
    }

    .container {
        padding: 1rem;
    }

    .stat-value {
        font-size: 1.5rem;
    }

    .round-item {
        grid-template-columns: 70px repeat(4, 1fr);
        font-size: 0.8rem;
    }

    .strategy-intro {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
}

/* ========== 动画效果 ========== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-in {
    animation: fadeInUp 0.5s ease forwards;
}

.animate-delay-1 { animation-delay: 0.1s; }
.animate-delay-2 { animation-delay: 0.2s; }
.animate-delay-3 { animation-delay: 0.3s; }
.animate-delay-4 { animation-delay: 0.4s; }

/* 加载状态 */
.loading-spinner {
    display: inline-block;
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}