/**
 * EA策略下载站 - Vercel风格全黑极简主题
 * Inspired by vercel.com/ai-sdk
 */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

:root {
    --bg: #000000;
    --bg-secondary: #0a0a0a;
    --border: rgba(255,255,255,0.08);
    --text-primary: #fafafa;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    --accent: #fafafa;
    --accent-hover: #e4e4e7;
    --card-bg: #0a0a0a;
    --card-border: rgba(255,255,255,0.06);
    --card-hover-border: rgba(255,255,255,0.14);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--text-primary);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    line-height: 1.6;
    font-size: 15px;
}

a { color: var(--text-primary); text-decoration: none; transition: color 0.15s; }
a:hover { color: var(--text-secondary); }

/* ========== 导航栏 - 毛玻璃 ========== */
.navbar {
    background: rgba(0,0,0,0.88) !important;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 0 24px;
    height: 56px;
}
.navbar .container {
    max-width: 1280px;
    display: flex;
    align-items: center;
    height: 100%;
    padding: 0;
}
.navbar-brand {
    font-size: 16px;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-primary) !important;
    display: flex;
    align-items: center;
    gap: 8px;
}
.navbar-brand img { height: 24px; }
.navbar-nav { display: flex; align-items: center; gap: 4px; }
.navbar-nav .nav-link {
    color: var(--text-secondary) !important;
    font-size: 13.5px;
    font-weight: 500;
    padding: 6px 12px !important;
    border-radius: 6px;
    transition: all 0.15s;
}
.navbar-nav .nav-link:hover { color: var(--text-primary) !important; background: rgba(255,255,255,0.04); }
.navbar-nav .nav-link.active { color: var(--text-primary) !important; }
.navbar .btn-outline-primary {
    background: var(--text-primary);
    color: #000 !important;
    border: none;
    font-size: 13.5px;
    font-weight: 600;
    padding: 6px 14px;
    border-radius: 6px;
}
.navbar .btn-outline-primary:hover { background: var(--accent-hover); }
.navbar .form-control {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    color: var(--text-primary);
    font-size: 13.5px;
    border-radius: 6px;
    padding: 6px 12px;
    height: 36px;
    width: 200px;
}
.navbar .form-control::placeholder { color: var(--text-muted); }
.navbar .btn-light {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    border-radius: 0 6px 6px 0;
}
.navbar .btn-light:hover { background: rgba(255,255,255,0.04); color: var(--text-primary); }

/* ========== 容器 ========== */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ========== Hero区域 ========== */
.hero-section {
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 100px 24px 80px;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.hero-section::before {
    content: '';
    position: absolute;
    top: -50%;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(255,255,255,0.03) 0%, transparent 70%);
    pointer-events: none;
}
.hero-section h1 {
    font-size: 56px;
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.1;
    color: var(--text-primary);
    max-width: 700px;
    margin: 0 auto 16px;
}
.hero-section .lead {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 auto 40px;
    line-height: 1.6;
}
.hero-stats {
    display: flex;
    justify-content: center;
    gap: 48px;
    margin-top: 48px;
}
.stat-item { text-align: center; }
.stat-number {
    font-size: 32px;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}
.stat-label { font-size: 13px; color: var(--text-muted); margin-top: 4px; text-transform: uppercase; letter-spacing: 0.05em; }

/* ========== 区域标题 ========== */
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 32px;
}
.section-header h2 {
    font-size: 20px;
    font-weight: 600;
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
    gap: 10px;
}
.section-header h2 i { font-size: 18px; }
.section-header span { font-size: 14px; color: var(--text-secondary); }
.section-header .btn-outline-primary {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 13px;
    padding: 6px 14px;
    border-radius: 6px;
}
.section-header .btn-outline-primary:hover { border-color: rgba(255,255,255,0.2); color: var(--text-primary); }

/* ========== 面包屑 ========== */
.breadcrumb {
    background: transparent;
    padding: 12px 0;
    margin: 0;
    font-size: 13px;
}
.breadcrumb-item a { color: var(--text-muted); }
.breadcrumb-item.active { color: var(--text-primary); }
.breadcrumb-item + .breadcrumb-item::before { color: var(--text-muted); }

/* ========== 卡片 ========== */
.card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    transition: all 0.2s;
}
.card:hover { border-color: var(--card-hover-border); }
.card-header {
    background: transparent !important;
    border-bottom: 1px solid var(--border);
    padding: 16px 20px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}
.card-body { padding: 20px; color: var(--text-secondary); }
.card-footer {
    background: transparent;
    border-top: 1px solid var(--border);
    padding: 12px 20px;
}

/* ========== EA策略卡片 ========== */
.ea-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 10px;
    overflow: hidden;
    transition: all 0.2s;
}
.ea-card:hover {
    border-color: var(--card-hover-border);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.4);
}
.card-img-wrapper {
    position: relative;
    height: 160px;
    overflow: hidden;
    background: #111;
    display: flex;
    align-items: center;
    justify-content: center;
    border-bottom: 1px solid var(--border);
}
.card-img-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.card-img-wrapper .badge-platform {
    position: absolute;
    top: 8px;
    left: 8px;
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    color: var(--text-primary);
    font-size: 11px;
    font-weight: 600;
    padding: 3px 8px;
    border-radius: 4px;
    border: 1px solid rgba(255,255,255,0.1);
}
.card-img-wrapper .badge-recommend {
    position: absolute;
    top: 8px;
    right: 8px;
    background: var(--text-primary);
    color: #000;
    font-size: 10px;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 4px;
}
.card-img-wrapper .badge-price {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    color: var(--text-primary);
    font-size: 11px;
    font-weight: 600;
    padding: 3px 8px;
    border-radius: 4px;
    border: 1px solid rgba(255,255,255,0.1);
}
.ea-card .card-body { padding: 14px; background: var(--card-bg); }
.ea-card .card-title {
    font-size: 14px;
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--text-primary);
    margin-bottom: 6px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.ea-card .card-text { font-size: 12.5px; color: var(--text-muted); line-height: 1.5; }
.ea-card .btn-outline-primary {
    font-size: 12.5px;
    font-weight: 500;
    padding: 6px 12px;
    border-radius: 6px;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    background: transparent;
    transition: all 0.15s;
}
.ea-card .btn-outline-primary:hover {
    border-color: rgba(255,255,255,0.2);
    color: var(--text-primary);
    background: rgba(255,255,255,0.03);
}

/* ========== 按钮 ========== */
.btn {
    font-family: 'Inter', sans-serif;
    font-weight: 500;
    font-size: 13.5px;
    padding: 8px 18px;
    border-radius: 6px;
    transition: all 0.15s;
    letter-spacing: -0.01em;
}
.btn-primary {
    background: var(--text-primary);
    border: none;
    color: #000;
    font-weight: 600;
}
.btn-primary:hover { background: var(--accent-hover); color: #000; }
.btn-outline-primary { border: 1px solid var(--border); color: var(--text-secondary); background: transparent; }
.btn-outline-primary:hover { border-color: rgba(255,255,255,0.2); color: var(--text-primary); }
.btn-success { background: #22c55e; border: none; color: #000; }
.btn-light { background: var(--text-primary); color: #000; font-weight: 600; border: none; }
.btn-lg { padding: 12px 32px; font-size: 15px; border-radius: 8px; }

/* ========== 表单 ========== */
.form-control {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    color: var(--text-primary);
    font-size: 14px;
    border-radius: 6px;
    padding: 8px 14px;
    transition: border-color 0.15s;
}
.form-control:focus {
    border-color: rgba(255,255,255,0.2);
    box-shadow: 0 0 0 2px rgba(255,255,255,0.04);
    outline: none;
    background: var(--bg-secondary);
    color: var(--text-primary);
}
.form-control::placeholder { color: var(--text-muted); }
label { font-size: 13px; font-weight: 500; color: var(--text-secondary); margin-bottom: 6px; display: block; }
.input-group-text { background: var(--bg-secondary); border-color: var(--border); color: var(--text-muted); }
select.form-control { background: var(--bg-secondary); color: var(--text-primary); }
.custom-control-label { color: var(--text-secondary); font-size: 13px; }
.custom-control-label::before { background: var(--bg-secondary); border-color: var(--border); }
.custom-control-input:checked ~ .custom-control-label::before { background: var(--text-primary); border-color: var(--text-primary); }

/* ========== 表格 ========== */
.table { color: var(--text-secondary); font-size: 13px; }
.table thead th {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    color: var(--text-primary);
    font-weight: 600;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 12px 16px;
}
.table td, .table th { border-color: var(--border); padding: 12px 16px; }
.table-hover tbody tr:hover { background: rgba(255,255,255,0.02); }

/* ========== 分页 ========== */
.pagination .page-link {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 13px;
    padding: 6px 12px;
    border-radius: 6px;
    margin: 0 2px;
}
.pagination .page-link:hover { border-color: rgba(255,255,255,0.2); color: var(--text-primary); }
.pagination .active .page-link { background: var(--text-primary); border-color: var(--text-primary); color: #000; }

/* ========== 详情页 ========== */
.download-section {
    background: var(--bg-secondary) !important;
    border: 1px solid var(--border) !important;
    border-radius: 12px !important;
    padding: 32px !important;
}
.download-btn, .download-section .btn-light {
    background: var(--text-primary);
    color: #000;
    border: none;
    font-weight: 600;
    padding: 14px 36px;
    font-size: 15px;
    border-radius: 8px;
    transition: background 0.15s;
}
.download-btn:hover, .download-section .btn-light:hover { background: var(--accent-hover); }
.strategy-info-table {
    background: var(--bg-secondary) !important;
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 13px;
}
.strategy-info-table strong { color: var(--text-primary); font-weight: 600; }

/* ========== 列表组 ========== */
.list-group-item {
    background: transparent;
    border-color: var(--border);
    color: var(--text-secondary);
    padding: 14px 20px;
}
.list-group-item:hover { background: rgba(255,255,255,0.02); }

/* ========== 徽章 ========== */
.badge {
    font-size: 11px;
    font-weight: 600;
    padding: 3px 8px;
    border-radius: 4px;
    letter-spacing: 0.02em;
}
.badge-success { background: rgba(34,197,94,0.12); color: #22c55e; border: 1px solid rgba(34,197,94,0.2); }
.badge-info { background: rgba(59,130,246,0.12); color: #3b82f6; border: 1px solid rgba(59,130,246,0.2); }
.badge-warning { background: rgba(234,179,8,0.12); color: #eab308; border: 1px solid rgba(234,179,8,0.2); }
.badge-secondary { background: rgba(255,255,255,0.06); color: var(--text-secondary); border: 1px solid var(--border); }
.badge-light { background: rgba(255,255,255,0.04); color: var(--text-secondary); border: 1px solid var(--border); }

/* ========== 警报 ========== */
.alert { border-radius: 8px; font-size: 13px; padding: 12px 16px; }
.alert-info { background: rgba(59,130,246,0.06); border: 1px solid rgba(59,130,246,0.15); color: #93c5fd; }
.alert-success { background: rgba(34,197,94,0.06); border: 1px solid rgba(34,197,94,0.15); color: #86efac; }
.alert-danger { background: rgba(239,68,68,0.06); border: 1px solid rgba(239,68,68,0.15); color: #fca5a5; }

/* ========== 背景/工具 ========== */
.bg-light { background: var(--bg-secondary) !important; }
.border-bottom { border-bottom: 1px solid var(--border) !important; }
hr { border-color: var(--border); }
.text-muted { color: var(--text-muted) !important; }

/* ========== 页脚 ========== */
footer {
    background: var(--bg-secondary) !important;
    border-top: 1px solid var(--border);
    padding: 48px 24px 32px;
}
footer h5 { font-size: 14px; font-weight: 600; color: var(--text-primary); }
footer h6 { font-size: 13px; font-weight: 600; color: var(--text-secondary); }
footer p, footer small { color: var(--text-muted); }
footer a:hover { color: var(--text-primary) !important; }

/* ========== 弹窗 ========== */
.modal-content { background: var(--bg); border: 1px solid var(--border); border-radius: 12px; }
.modal-header { border-bottom: 1px solid var(--border); padding: 20px 24px; }
.modal-footer { border-top: 1px solid var(--border); padding: 16px 24px; }
.modal-title { font-size: 16px; font-weight: 600; color: var(--text-primary); }
.close { color: var(--text-secondary); }

/* ========== 后台管理 ========== */
.admin-header { background: var(--bg); border-bottom: 1px solid var(--border); }
.admin-sidebar {
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    min-height: calc(100vh - 56px);
}
.admin-sidebar .nav-link {
    color: var(--text-muted);
    font-size: 13px;
    padding: 10px 16px;
    border-radius: 6px;
    margin: 2px 8px;
}
.admin-sidebar .nav-link:hover, .admin-sidebar .nav-link.active {
    color: var(--text-primary);
    background: rgba(255,255,255,0.04);
}
.stat-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 10px;
}
.stat-card:hover { border-color: var(--card-hover-border); }
.stat-card .stat-icon { font-size: 24px; opacity: 0.6; }

/* ========== 安装向导 ========== */
.install-card .card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
}

/* ========== 响应式 ========== */
@media (max-width: 768px) {
    .hero-section { padding: 60px 16px 40px; }
    .hero-section h1 { font-size: 32px; }
    .hero-stats { gap: 24px; }
    .stat-number { font-size: 24px; }
    .container { padding: 0 16px; }
    .card-img-wrapper { height: 130px; }
    .navbar .form-control { width: 120px; }
}