:root{--primary:#4f6ef2;--primary-weak:#eef2ff;--bg:#f4f6fb;--text:#1f2937;--muted:#6b7280;--border:#e8ecf3;--danger:#ef4444;--success:#10b981;--shadow:0 1px 2px rgba(16,24,40,.05),0 1px 3px rgba(16,24,40,.06)}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--text);font-size:14px}
a{color:var(--primary);text-decoration:none}

/* 启动遮罩（避免刷新时闪烁登录页） */
#splash{position:fixed;inset:0;background:var(--bg);display:flex;align-items:center;justify-content:center;z-index:200}
.spinner{width:26px;height:26px;border:3px solid #dfe4ff;border-top-color:var(--primary);border-radius:50%;animation:spin .7s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* 登录 */
#login{position:fixed;inset:0;background:linear-gradient(160deg,#eef2ff,#dbe4ff 45%,#f4f6fb);display:none;align-items:center;justify-content:center;z-index:100}
.login-box{background:#fff;border-radius:16px;padding:44px 40px;width:380px;box-shadow:0 24px 70px rgba(49,46,129,.18)}
.login-box h1{font-size:22px;text-align:center;margin-bottom:6px}
.login-box p{text-align:center;color:var(--muted);margin-bottom:26px}
.login-box .btn{padding:11px;font-size:14px}

/* 侧边栏（白色系） */
#app{display:none}
.sidebar{position:fixed;left:0;top:0;bottom:0;width:210px;background:#fff;border-right:1px solid var(--border);padding:20px 12px;display:flex;flex-direction:column}
.sidebar .logo{font-size:16px;font-weight:700;color:var(--text);padding:4px 12px 20px;display:flex;align-items:center;gap:9px}
.sidebar .logo::before{content:'';width:11px;height:11px;border-radius:4px;background:linear-gradient(135deg,#6d87f5,#4f6ef2);flex:none}
.sidebar a{display:block;padding:11px 14px;margin:2px 0;border-radius:9px;color:#4b5563;cursor:pointer;transition:background .15s,color .15s;font-size:13.5px}
.sidebar a:hover{background:#f3f5fa;color:var(--text)}
.sidebar a.active{background:var(--primary-weak);color:var(--primary);font-weight:600}
.sidebar a.quiet{color:var(--danger);margin-top:auto}

/* 主区域 */
.main{margin-left:210px;padding:24px 28px}
.topbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px}
.topbar h2{font-size:20px;font-weight:700}

/* 卡片 / 按钮 */
.card{background:#fff;border:1px solid var(--border);border-radius:12px;padding:18px;box-shadow:var(--shadow)}
.btn{display:inline-block;padding:7px 14px;border:none;border-radius:8px;cursor:pointer;font-size:13px;background:var(--primary);color:#fff;transition:opacity .15s,background .15s}
.btn:hover{opacity:.92}
.btn.ghost{background:#fff;color:var(--text);border:1px solid var(--border)}
.btn.ghost:hover{background:#f3f5fa;opacity:1}
.btn.sm{padding:4px 10px;font-size:12px;border-radius:6px}
.btn.danger{background:var(--danger)}
.btn:disabled{opacity:.45;cursor:not-allowed}

/* 表单控件 */
input,select,textarea{padding:8px 10px;border:1px solid var(--border);border-radius:8px;font-size:13px;outline:none;font-family:inherit;background:#fff;transition:border-color .15s,box-shadow .15s}
input:focus,select:focus,textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(79,110,242,.12)}

/* 表格 */
.toolbar{display:flex;gap:10px;margin-bottom:14px;flex-wrap:wrap;align-items:center}
table{width:100%;border-collapse:collapse}
th,td{text-align:left;padding:11px 10px;border-bottom:1px solid var(--border);font-size:13px;vertical-align:top}
th{color:var(--muted);font-weight:500;background:#f8f9fc;white-space:nowrap}
table tr:hover td{background:#f8faff}
td.maxw,th.maxw{max-width:260px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.pager{display:flex;gap:8px;align-items:center;justify-content:flex-end;margin-top:14px;color:var(--muted)}

/* 标签 */
.tag{display:inline-block;padding:2px 9px;border-radius:10px;font-size:12px}
.tag.on{background:#d1fae5;color:#065f46}
.tag.off{background:#fee2e2;color:#991b1b}

/* 仪表盘 */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:14px;margin-bottom:16px}
.stat{background:#fff;border:1px solid var(--border);border-radius:12px;padding:18px;box-shadow:var(--shadow);position:relative;overflow:hidden}
.stat::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,#6d87f5,#4f6ef2)}
.stat .num{font-size:26px;font-weight:700;color:var(--primary)}
.stat .label{color:var(--muted);margin-top:4px;font-size:13px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.card h3{font-size:15px;font-weight:600}

/* 弹窗 */
.modal-mask{position:fixed;inset:0;background:rgba(15,23,42,.42);display:none;align-items:flex-start;justify-content:center;z-index:50;overflow:auto;padding:40px 20px;backdrop-filter:blur(2px)}
.modal{background:#fff;border-radius:14px;width:640px;max-width:100%;padding:26px;box-shadow:0 24px 70px rgba(15,23,42,.25)}
.modal h3{margin-bottom:16px;font-size:16px}
.form-row{margin-bottom:12px}
.form-row label{display:block;margin-bottom:6px;color:var(--muted);font-size:13px}
.form-row input,.form-row select,.form-row textarea{width:100%}
.form-row textarea{min-height:80px;resize:vertical}
.form-cols{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.modal-foot{display:flex;justify-content:flex-end;gap:10px;margin-top:18px}
.empty{text-align:center;color:var(--muted);padding:30px 0}