:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --bg: #f3f5f9;
    --card: #ffffff;
    --text: #1f2937;
    --muted: #6b7280;
    --border: #e5e7eb;
    --ok: #047857;
    --danger: #dc2626;
}

* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    background: var(--bg);
    color: var(--text);
    font-size: 14px;
    line-height: 1.6;
}

/* ---------- 顶部导航 ---------- */
.topbar {
    background: var(--card);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 10;
}
.topbar-inner {
    max-width: 1180px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    height: 56px;
}
.brand { font-weight: 700; font-size: 17px; color: var(--primary); white-space: nowrap; }
.topbar nav { display: flex; gap: 4px; }
.topbar nav a {
    padding: 8px 14px;
    border-radius: 8px;
    color: var(--muted);
    text-decoration: none;
    font-size: 14px;
    white-space: nowrap;
}
.topbar nav a.on, .topbar nav a:hover { color: var(--primary); background: #eff6ff; }

/* ---------- 布局 ---------- */
.container { max-width: 1180px; margin: 24px auto; padding: 0 20px; }
.page-title { font-size: 20px; font-weight: 700; margin: 0 0 18px; }

/* ---------- 卡片 ---------- */
.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
}
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 16px; margin-bottom: 20px; }
.stat {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 18px 20px;
}
.stat .num { font-size: 26px; font-weight: 700; line-height: 1.2; }
.stat .lbl { color: var(--muted); font-size: 13px; margin-top: 4px; }

/* ---------- 表格 ---------- */
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { color: var(--muted); font-weight: 600; font-size: 13px; background: #fafafa; white-space: nowrap; }
tr:last-child td { border-bottom: 0; }

/* ---------- 按钮 ---------- */
.btn {
    display: inline-block;
    padding: 8px 14px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--card);
    color: var(--text);
    font-size: 13px;
    cursor: pointer;
    text-decoration: none;
    line-height: 1.4;
}
.btn:hover { border-color: #cbd5e1; background: #f8fafc; }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); }
.btn-danger { color: var(--danger); border-color: #fecaca; }
.btn-danger:hover { background: #fef2f2; border-color: var(--danger); }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-block { display: block; width: 100%; }

/* ---------- 表单 ---------- */
.field { margin-bottom: 16px; }
label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; color: #374151; }
input[type=text], input[type=password], input[type=url], input[type=number], textarea, select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    font-size: 14px;
    outline: none;
    background: #fff;
    color: var(--text);
    font-family: inherit;
}
input:focus, textarea:focus, select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, .12);
}
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; }
@media (max-width: 720px) { .form-grid { grid-template-columns: 1fr; } }

/* ---------- 徽章 ---------- */
.badge { display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: 12px; white-space: nowrap; }
.badge-ok { background: #ecfdf5; color: var(--ok); }
.badge-off { background: #f3f4f6; color: var(--muted); }

/* ---------- 二维码 ---------- */
.qr-thumb { width: 44px; height: 44px; border: 1px solid var(--border); border-radius: 6px; padding: 2px; background: #fff; }
.qr-thumb canvas { display: block; }
.qr-big { width: 200px; height: 200px; border: 1px solid var(--border); border-radius: 10px; padding: 8px; background: #fff; }
.qr-big canvas { display: block; }

/* ---------- 柱状图 ---------- */
.barchart { display: flex; align-items: flex-end; gap: 6px; height: 130px; margin-top: 12px; }
.barchart .col { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: flex-end; gap: 4px; min-width: 0; height: 100%; }
.barchart .bar { width: 100%; background: var(--primary); border-radius: 4px 4px 0 0; min-height: 2px; opacity: .85; transition: opacity .15s; }
.barchart .bar:hover { opacity: 1; }
.barchart .lbl { font-size: 10px; color: var(--muted); white-space: nowrap; overflow: hidden; max-width: 100%; }

/* ---------- 链接 ---------- */
.link-cell { color: var(--primary); text-decoration: none; word-break: break-all; }
.link-cell:hover { text-decoration: underline; }

/* ---------- 提示 ---------- */
.alert { padding: 12px 14px; border-radius: 8px; font-size: 14px; margin-bottom: 18px; }
.alert-error { background: #fef2f2; color: #b91c1c; border: 1px solid #fecaca; }
.alert-ok { background: #ecfdf5; color: #047857; border: 1px solid #a7f3d0; }
.tip-box {
    background: #fffbeb;
    border: 1px solid #fde68a;
    border-radius: 10px;
    padding: 12px 14px;
    font-size: 13px;
    color: #92400e;
    margin-bottom: 20px;
    line-height: 1.8;
}
.tip-box code { background: #fff7ed; padding: 1px 6px; border-radius: 4px; }
.muted { color: var(--muted); }
code { background: #f3f4f6; padding: 2px 6px; border-radius: 4px; font-family: Consolas, Menlo, monospace; }

/* ---------- 分页 ---------- */
.pager { display: flex; gap: 6px; align-items: center; justify-content: center; margin-top: 16px; flex-wrap: wrap; }
.pager a, .pager span {
    padding: 6px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    text-decoration: none;
    color: var(--text);
    font-size: 13px;
}
.pager a:hover { border-color: var(--primary); color: var(--primary); }
.pager .cur { background: var(--primary); color: #fff; border-color: var(--primary); }

/* ---------- 登录页 ---------- */
.login-body {
    display: flex; align-items: center; justify-content: center;
    min-height: 100vh; padding: 24px;
}
.login-box { width: 100%; max-width: 400px; padding: 32px; margin: 0; }

/* ---------- 操作按钮区 ---------- */
.actions { white-space: nowrap; }
.actions .btn, .actions form { margin-right: 4px; }
.actions form { display: inline; }