:root {
    --bg: #f4f6fb;
    --card: #ffffff;
    --border: #e4e7ef;
    --text: #1f2430;
    --muted: #6b7280;
    --primary: #4f46e5;
    --primary-dark: #4338ca;
    --danger: #dc2626;
    --success: #16a34a;
    --warning: #d97706;
    --radius: 12px;
    --shadow: 0 1px 3px rgba(15, 23, 42, .08), 0 1px 2px rgba(15, 23, 42, .04);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    background: var(--bg);
    color: var(--text);
    font-size: 14px;
    line-height: 1.5;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: 1200px; margin: 0 auto; padding: 24px; }

/* 登录页 */
.login-body {
    display: flex; align-items: center; justify-content: center;
    min-height: 100vh; background: linear-gradient(135deg, #eef2ff, #f4f6fb);
}
.login-card {
    width: 380px; background: var(--card); border-radius: 16px;
    box-shadow: 0 10px 40px rgba(15, 23, 42, .12); padding: 36px 32px;
}
.login-card h1 { font-size: 20px; margin-bottom: 4px; }
.login-card .sub { color: var(--muted); margin-bottom: 24px; }

/* 顶部导航 */
.topbar {
    background: var(--card); border-bottom: 1px solid var(--border);
    position: sticky; top: 0; z-index: 50;
}
.topbar-inner {
    max-width: 1200px; margin: 0 auto; padding: 0 24px;
    display: flex; align-items: center; gap: 24px; height: 60px;
}
.topbar .brand { font-weight: 700; font-size: 16px; color: var(--text); }
.topbar nav { display: flex; gap: 4px; flex: 1; }
.topbar nav a {
    padding: 8px 14px; border-radius: 8px; color: var(--muted); font-weight: 500;
}
.topbar nav a:hover { text-decoration: none; background: #f1f2f7; color: var(--text); }
.topbar nav a.active { background: var(--primary); color: #fff; }
.topbar .user { display: flex; align-items: center; gap: 12px; color: var(--muted); }
.btn-logout {
    background: none; border: 1px solid var(--border); color: var(--muted);
    padding: 6px 12px; border-radius: 8px; cursor: pointer; font-size: 13px;
}
.btn-logout:hover { color: var(--danger); border-color: var(--danger); }

/* 页面标题 */
.page-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; gap: 16px; flex-wrap: wrap; }
.page-head h2 { font-size: 22px; }
.page-head .desc { color: var(--muted); margin-top: 4px; }

/* 按钮 */
.btn {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 8px 16px; border-radius: 8px; border: 1px solid transparent;
    font-size: 14px; cursor: pointer; text-decoration: none; font-weight: 500;
    transition: background .15s, border-color .15s;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-outline { background: #fff; border-color: var(--border); color: var(--text); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-danger { background: #fff; border-color: var(--border); color: var(--danger); }
.btn-danger:hover { background: var(--danger); color: #fff; border-color: var(--danger); }
.btn-sm { padding: 5px 10px; font-size: 13px; }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #15803d; }

/* 卡片 */
.card {
    background: var(--card); border: 1px solid var(--border);
    border-radius: var(--radius); box-shadow: var(--shadow); padding: 20px;
    margin-bottom: 20px;
}
.card h3 { font-size: 16px; margin-bottom: 16px; }

/* 统计卡片 */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card {
    background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
    box-shadow: var(--shadow); padding: 18px 20px;
}
.stat-card .label { color: var(--muted); font-size: 13px; }
.stat-card .value { font-size: 28px; font-weight: 700; margin-top: 6px; }
.stat-card .hint { color: var(--muted); font-size: 12px; margin-top: 4px; }
.stat-card.accent .value { color: var(--primary); }
.stat-card.success .value { color: var(--success); }
.stat-card.warning .value { color: var(--warning); }
.stat-card.danger .value { color: var(--danger); }

/* 表格 */
.table-wrap { overflow-x: auto; }
table.data { width: 100%; border-collapse: collapse; }
table.data th {
    text-align: left; padding: 10px 12px; color: var(--muted);
    font-size: 12px; font-weight: 600; border-bottom: 1px solid var(--border);
    white-space: nowrap; text-transform: uppercase; letter-spacing: .03em;
}
table.data td { padding: 12px; border-bottom: 1px solid var(--border); vertical-align: middle; }
table.data tr:last-child td { border-bottom: none; }
table.data tr:hover td { background: #fafbfe; }
.thumb { width: 120px; height: 48px; object-fit: cover; border-radius: 8px; border: 1px solid var(--border); display: block; }
.thumbsm { width: 64px; height: 40px; object-fit: cover; border-radius: 6px; border: 1px solid var(--border); display: block; }

/* 徽章 */
.badge {
    display: inline-block; padding: 3px 10px; border-radius: 999px;
    font-size: 12px; font-weight: 600;
}
.badge-success { background: #dcfce7; color: var(--success); }
.badge-danger { background: #fee2e2; color: var(--danger); }
.badge-muted { background: #f1f2f7; color: var(--muted); }
.badge-primary { background: #e0e7ff; color: var(--primary); }
.badge-warning { background: #fef3c7; color: var(--warning); }

/* 表单 */
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; margin-bottom: 6px; font-weight: 500; font-size: 13px; }
.form-group label .req { color: var(--danger); }
.form-group .help { color: var(--muted); font-size: 12px; margin-top: 4px; }
.form-control {
    width: 100%; padding: 9px 12px; border: 1px solid var(--border); border-radius: 8px;
    font-size: 14px; background: #fff; color: var(--text);
}
.form-control:focus { outline: 2px solid var(--primary); outline-offset: -1px; border-color: var(--primary); }
select.form-control { appearance: auto; }
textarea.form-control { resize: vertical; min-height: 90px; }
.form-actions { display: flex; gap: 10px; margin-top: 8px; }

/* Flash 消息 */
.flash { margin-bottom: 16px; }
.flash-item {
    padding: 12px 16px; border-radius: 8px; margin-bottom: 8px;
    border: 1px solid transparent; font-size: 14px;
}
.flash-success { background: #f0fdf4; border-color: #bbf7d0; color: #166534; }
.flash-error { background: #fef2f2; border-color: #fecaca; color: #991b1b; }
.flash-info { background: #eff6ff; border-color: #bfdbfe; color: #1e40af; }

/* 空状态 */
.empty { text-align: center; color: var(--muted); padding: 40px 20px; }
.empty .icon { font-size: 40px; margin-bottom: 10px; }

/* 代码块 */
.code-block {
    position: relative; background: #0f172a; color: #e2e8f0; border-radius: 10px;
    padding: 16px; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 13px; overflow-x: auto; white-space: pre; margin-bottom: 8px;
}
.copy-btn {
    position: absolute; top: 10px; right: 10px; background: rgba(255,255,255,.1);
    border: 1px solid rgba(255,255,255,.2); color: #e2e8f0; border-radius: 6px;
    padding: 4px 10px; font-size: 12px; cursor: pointer;
}
.copy-btn:hover { background: rgba(255,255,255,.2); }

/* 表格内操作 */
.row-actions { display: flex; gap: 8px; align-items: center; }

/* 预览 */
.preview-frame {
    width: 100%; border: 1px solid var(--border); border-radius: 10px;
    background: #fff; min-height: 200px; padding: 20px; display: flex; align-items: center; justify-content: center;
}

/* 切换开关 */
.switch { position: relative; display: inline-block; width: 42px; height: 24px; }
.switch input { opacity: 0; width: 0; height: 0; }
.switch .slider {
    position: absolute; cursor: pointer; inset: 0; background: #d1d5db; border-radius: 999px; transition: .2s;
}
.switch .slider:before {
    content: ""; position: absolute; height: 18px; width: 18px; left: 3px; top: 3px;
    background: #fff; border-radius: 50%; transition: .2s;
}
.switch input:checked + .slider { background: var(--success); }
.switch input:checked + .slider:before { transform: translateX(18px); }

/* 模态 */
.modal-bg {
    position: fixed; inset: 0; background: rgba(15,23,42,.5); z-index: 100;
    display: flex; align-items: center; justify-content: center;
}
.modal {
    background: #fff; border-radius: 14px; box-shadow: 0 20px 60px rgba(0,0,0,.2);
    padding: 28px; max-width: 460px; width: 90%;
}
.modal h3 { margin-bottom: 12px; font-size: 18px; }
.modal p { color: var(--muted); margin-bottom: 8px; }
.modal .form-actions { justify-content: flex-end; margin-top: 20px; }

/* Tabs */
.tabs { display: flex; gap: 8px; margin-bottom: 20px; flex-wrap: wrap; }
.tab {
    padding: 8px 16px; border-radius: 8px; background: #fff; border: 1px solid var(--border);
    cursor: pointer; font-size: 14px; color: var(--muted);
}
.tab:hover { color: var(--text); }
.tab.active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* 时间线信息 */
.meta { color: var(--muted); font-size: 12px; }

.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); gap: 20px; }

/* 弹窗配置表单内嵌预览 */
.mini-preview {
    border: 1px dashed var(--border); border-radius: 10px; padding: 12px;
    background: #fafbfe; display: flex; gap: 12px; align-items: center;
}
.mini-preview img { width: 80px; height: 48px; object-fit: cover; border-radius: 8px; }

@media (max-width: 720px) {
    .topbar nav { display: none; }
    .page-head h2 { font-size: 18px; }
}