/* ===== 后台管理样式（深红色主题） ===== */
:root {
    --primary: #8B0000;
    --primary-dark: #6B0000;
    --primary-bg: #FFF5F5;
    --sidebar-bg: #1A1A2E;
    --sidebar-hover: #2A2A4A;
    --text: #2C2C2C;
    --text-light: #999;
    --border: #E8E8E8;
    --bg: #F5F6FA;
    --radius: 8px;
}

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

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    font-size: 14px;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
}

a { text-decoration: none; color: inherit; }

/* ===== 登录页 ===== */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
}
.login-box {
    background: #fff;
    border-radius: 12px;
    padding: 40px 36px;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}
.login-box h1 {
    text-align: center;
    font-size: 22px;
    color: var(--primary);
    margin-bottom: 28px;
}
.error-msg {
    background: #FFF0F0;
    color: #D00;
    padding: 10px 14px;
    border-radius: 6px;
    margin-bottom: 16px;
    font-size: 13px;
}

/* ===== 布局 ===== */
.admin-layout {
    display: flex;
    min-height: 100vh;
}

/* ===== 侧边栏 ===== */
.admin-sidebar {
    width: 220px;
    background: var(--sidebar-bg);
    color: #ccc;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    overflow-y: auto;
}
.sidebar-brand {
    padding: 24px 20px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}
.sidebar-brand h2 {
    color: #fff;
    font-size: 18px;
    margin-bottom: 4px;
}
.sidebar-brand span {
    font-size: 12px;
    color: #888;
}
.sidebar-nav { padding: 12px 0; flex: 1; }
.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    color: #aaa;
    font-size: 14px;
    transition: all 0.2s;
    border-left: 3px solid transparent;
}
.sidebar-nav a:hover {
    background: var(--sidebar-hover);
    color: #fff;
}
.sidebar-nav a.active {
    background: rgba(139,0,0,0.3);
    color: #fff;
    border-left-color: var(--primary);
}
.sidebar-nav a span { font-size: 16px; }
.sidebar-nav .logout { margin-top: auto; color: #f66; }

/* ===== 主内容 ===== */
.admin-main {
    flex: 1;
    margin-left: 220px;
    padding: 28px 32px;
    min-height: 100vh;
}
.admin-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}
.admin-header h1 { font-size: 22px; color: var(--text); }

/* ===== 统计卡片 ===== */
.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    margin-bottom: 32px;
}
.stat-card {
    background: #fff;
    border-radius: var(--radius);
    padding: 24px;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    border-left: 4px solid var(--primary);
}
.stat-num {
    display: block;
    font-size: 28px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 6px;
}
.stat-label { font-size: 13px; color: var(--text-light); }

/* ===== 快捷操作 ===== */
.quick-actions {
    background: #fff;
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}
.quick-actions h2 { font-size: 16px; margin-bottom: 16px; }
.quick-actions .btn { margin-right: 10px; margin-bottom: 10px; }

/* ===== 表单 ===== */
.admin-form {
    background: #fff;
    border-radius: var(--radius);
    padding: 28px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}
.form-row { display: flex; gap: 20px; }
.form-row .form-group { flex: 1; }
.form-group { margin-bottom: 20px; }
.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 6px;
    font-size: 13px;
    color: var(--text);
}
.form-group input[type="text"],
.form-group input[type="url"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 14px;
    font-family: inherit;
    transition: border-color 0.3s;
    background: #fff;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(139,0,0,0.1);
}

.seo-fieldset {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 24px;
}
.seo-fieldset legend {
    font-weight: 700;
    color: var(--primary);
    padding: 0 10px;
    font-size: 14px;
}

.form-actions {
    display: flex;
    gap: 12px;
    margin-top: 8px;
}

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 9px 20px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
}
.btn-primary {
    background: var(--primary);
    color: #fff;
}
.btn-primary:hover { background: var(--primary-dark); }
.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 1px solid var(--primary);
}
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-danger { background: #E74C3C; color: #fff; }
.btn-danger:hover { background: #C0392B; }
.btn-sm { padding: 5px 12px; font-size: 13px; }
.btn-block { width: 100%; }

/* ===== 表格 ===== */
.admin-table {
    width: 100%;
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    border-collapse: collapse;
}
.admin-table th {
    background: var(--primary-bg);
    color: var(--primary);
    padding: 12px 16px;
    text-align: left;
    font-size: 13px;
    font-weight: 700;
}
.admin-table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    font-size: 14px;
}
.admin-table tr:last-child td { border-bottom: none; }
.admin-table tr:hover td { background: #FAFAFA; }
.actions { display: flex; gap: 6px; }

.badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 50px;
    font-size: 12px;
    background: #eee;
    color: #888;
}
.badge-success { background: #E8F5E9; color: #2E7D32; }

/* ===== 提示 ===== */
.alert {
    padding: 12px 18px;
    border-radius: 6px;
    margin-bottom: 20px;
    font-size: 14px;
}
.alert-success {
    background: #E8F5E9;
    color: #2E7D32;
    border-left: 4px solid #2E7D32;
}
.alert pre { white-space: pre-wrap; font-family: monospace; font-size: 12px; }

/* ===== 百度推送 ===== */
.push-section {
    background: #fff;
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 24px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}
.push-section h3 { font-size: 15px; margin-bottom: 16px; color: var(--primary); }
.push-section textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 14px;
    font-family: inherit;
    resize: vertical;
}

/* ===== 网站地图 ===== */
.sitemap-actions, .sitemap-links, .sitemap-tip {
    background: #fff;
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 24px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}
.sitemap-links h3, .sitemap-tip h3 { font-size: 15px; margin-bottom: 12px; }
.sitemap-links .btn { margin-right: 10px; }
.sitemap-tip pre {
    background: var(--sidebar-bg);
    color: #0f0;
    padding: 12px 16px;
    border-radius: 6px;
    font-size: 13px;
    overflow-x: auto;
    margin-top: 8px;
}

/* ===== 移动端后台 ===== */
@media (max-width: 768px) {
    .admin-sidebar {
        width: 60px;
    }
    .sidebar-brand { padding: 16px 8px; text-align: center; }
    .sidebar-brand h2 { font-size: 14px; }
    .sidebar-brand span { display: none; }
    .sidebar-nav a {
        justify-content: center;
        padding: 12px 8px;
        font-size: 12px;
        flex-direction: column;
        gap: 2px;
    }
    .sidebar-nav a span { font-size: 18px; }
    .admin-main { margin-left: 60px; padding: 16px; }
    .form-row { flex-direction: column; gap: 0; }
}