:root { --blue:#1e6bff; --line:#e4eaf3; --text:#17233f; --muted:#7b879c; }
* { box-sizing: border-box; }
body { margin: 0; font: 14px/1.6 "Microsoft YaHei", Arial, sans-serif; color: var(--text); background: #f3f6fb; }
a { text-decoration: none; color: inherit; }
.login-body { min-height: 100vh; display: grid; place-items: center; background: linear-gradient(135deg, #eaf4ff, #f7faff); }
.login-card { width: 420px; background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 34px; box-shadow: 0 12px 40px rgba(33,64,120,.14); }
.login-card h1 { margin: 0 0 8px; }
.login-card p { color: var(--muted); margin: 0 0 20px; }
.login-card label, .admin-form label { display: grid; gap: 8px; color: #34445f; margin-bottom: 14px; }
input, select, textarea { width: 100%; border: 1px solid #cfd9e8; border-radius: 6px; padding: 10px 12px; background: #fff; font: inherit; }
button { border: 0; border-radius: 6px; padding: 10px 18px; color: #fff; background: var(--blue); cursor: pointer; }
.danger-btn { background: #e84f5e; }
.status-pill { display: inline-flex; align-items: center; height: 24px; padding: 0 9px; border-radius: 999px; font-size: 12px; background: #fff1d8; color: #9b6500; }
.status-pill.ok { background: #e8f8ec; color: #18863b; }
.status-pill.warn { background: #fff1d8; color: #9b6500; }
.node-table code { display: block; max-width: 260px; margin: 2px 0; padding: 3px 6px; border-radius: 5px; background: #f1f5fb; color: #1b376d; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.admin-actions { display: flex; gap: 10px; }
.notice-box { background: #fff8e6; border: 1px solid #ffe1a6; color: #7b5614; border-radius: 8px; padding: 12px 14px; margin-bottom: 16px; }
.form-error { background: #fff0f0; color: #c93636; border: 1px solid #ffd2d2; border-radius: 6px; padding: 9px 12px; margin-bottom: 12px; }
.admin-body { display: grid; grid-template-columns: 220px 1fr; min-height: 100vh; }
.admin-sidebar { background: #17233f; color: #d6def0; padding: 22px 16px; display: flex; flex-direction: column; gap: 8px; }
.admin-logo { color: #fff; font-size: 20px; font-weight: 800; margin-bottom: 18px; }
.admin-sidebar a:not(.admin-logo) { padding: 11px 12px; border-radius: 7px; }
.admin-sidebar a:hover { background: rgba(255,255,255,.08); }
.admin-main { padding: 26px; }
.admin-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; }
.admin-top h1 { margin: 0; }
.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 18px; }
.stat-grid div, .admin-card { background: #fff; border: 1px solid var(--line); border-radius: 10px; box-shadow: 0 2px 8px rgba(39,55,84,.05); }
.stat-grid div { padding: 22px; display: grid; gap: 4px; }
.stat-grid b { font-size: 28px; color: var(--blue); }
.stat-grid span { color: var(--muted); }
.admin-card { padding: 22px; }
.admin-card h2 { margin: 0 0 16px; }
.admin-table { width: 100%; border-collapse: collapse; }
.admin-table th, .admin-table td { border-bottom: 1px solid #edf1f7; padding: 12px; text-align: left; vertical-align: middle; }
.admin-table th { background: #f7f9fc; color: #53627d; font-weight: 600; }
.admin-table small { display: block; color: var(--muted); }
.form-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.switch-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-bottom: 16px; }
.switch-grid label { display: flex; align-items: center; gap: 8px; border: 1px solid var(--line); border-radius: 7px; padding: 10px; background: #f8fbff; }
.switch-grid input, .admin-table input[type="checkbox"] { width: auto; }
.small-input { width: 80px; }
.save-message { margin-top: 12px; color: var(--blue); }
.ad-editor { border-bottom: 1px solid var(--line); padding-bottom: 18px; margin-bottom: 18px; }
.ad-editor h2 small { color: var(--muted); font-weight: 400; }
@media (max-width: 900px) {
  .admin-body { grid-template-columns: 1fr; }
  .admin-sidebar { position: static; }
  .stat-grid, .form-grid, .switch-grid { grid-template-columns: 1fr; }
}