*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  color:#1f2329;background:#f5f6f8;font-size:14px;line-height:1.6}
a{color:#2f6fed;text-decoration:none}
a:hover{text-decoration:underline}

/* 登录 */
body.login{display:flex;align-items:center;justify-content:center;min-height:100vh;
  background:linear-gradient(135deg,#3a7bd5,#2f6fed)}
body.login form{width:320px;background:#fff;padding:32px 28px;border-radius:12px;
  box-shadow:0 10px 40px rgba(0,0,0,.18)}
body.login h2{text-align:center;margin-bottom:22px;color:#1f2329;font-size:20px}
body.login input{width:100%;padding:11px 12px;margin-bottom:14px;border:1px solid #dcdfe6;
  border-radius:8px;font-size:14px;outline:none}
body.login input:focus{border-color:#2f6fed}

/* 后台布局 */
aside{position:fixed;top:0;left:0;bottom:0;width:200px;background:#1f2937;color:#cfd6e4;
  padding:22px 0;display:flex;flex-direction:column}
aside h1{color:#fff;font-size:18px;text-align:center;margin-bottom:26px;font-weight:600}
aside nav{display:flex;flex-direction:column;flex:1;overflow-y:auto}
aside nav a{color:#cfd6e4;padding:13px 22px;font-size:14px}
aside nav a:hover{background:#2f3b4d;color:#fff;text-decoration:none}
aside nav a.on{background:#2f3b4d;color:#fff}
aside nav .nav-group{display:block;padding:20px 22px 6px;font-size:12px;color:#7d8797}
aside nav .nav-group.divider{border-top:1px solid rgba(255,255,255,.08);margin-top:16px;padding-top:16px}
aside nav .nav-bottom{margin-top:auto;border-top:1px solid rgba(255,255,255,.08);padding-top:8px;margin-top:auto}
aside nav .nav-bottom .nav-group{padding-top:10px}

main{margin-left:200px;margin-top:56px;padding:24px 40px 34px;max-width:980px}
main h2{font-size:22px;margin-bottom:22px;font-weight:600}

/* 顶栏：右侧 admin 下拉（修改密码 / 退出） */
.topbar{position:fixed;top:0;left:200px;right:0;height:56px;background:#fff;
  display:flex;align-items:center;justify-content:space-between;padding:0 24px;
  border-bottom:1px solid #e9ecf1;z-index:50}
.topbar .tb-title{font-size:16px;font-weight:600;color:#1f2329;flex:none}
.topbar .tb-module{flex:1;display:flex;align-items:center;gap:10px;margin-left:20px;min-width:0}
.user-menu{position:relative;flex:none}
.user-menu .um-btn{cursor:pointer;font-size:14px;color:#4b5563;padding:9px 16px;border-radius:999px;background:#f5f6f8}
.user-menu .um-btn:hover{background:#eceff3}
.um-drop{display:none;position:absolute;right:0;top:100%;margin-top:6px;min-width:140px;background:#fff;
  border:1px solid #e9ecf1;border-radius:12px;box-shadow:0 8px 24px rgba(0,0,0,.12);
  overflow:hidden;padding:4px 0}
.um-drop.open{display:block}
.um-drop a{display:block;padding:11px 18px;color:#2f6fed;font-size:14px;font-weight:500}
.um-drop a:hover{background:#f5f6f8;text-decoration:none}
.um-drop a:last-child{color:#6b7280}

/* 统计卡 */
.stat{display:flex;gap:16px;margin-bottom:24px}
.stat>div{flex:1;background:#fff;border:1px solid #e9ecf1;border-radius:10px;
  padding:20px;text-align:center;box-shadow:0 1px 3px rgba(0,0,0,.04)}
.stat>div b{display:block;font-size:30px;color:#2f6fed;font-weight:700}
.stat>div span{color:#8a94a6;font-size:13px}

/* 表格 */
.tb{width:100%;border-collapse:collapse;background:#fff;border-radius:10px;overflow:hidden;
  box-shadow:0 1px 3px rgba(0,0,0,.04)}
.tb th,.tb td{padding:13px 16px;text-align:left;border-bottom:1px solid #eef0f3}
.tb th{background:#fafbfc;color:#8a94a6;font-weight:600;font-size:13px}
.tb tr:last-child td{border-bottom:none}
.tb .muted{color:#aab2c0;text-align:center}
.lk{color:#2f6fed}

/* 表单 */
label{display:block;margin-bottom:16px;font-weight:500;color:#4b5563}
label input{display:block;width:100%;margin-top:6px;padding:10px 12px;border:1px solid #dcdfe6;
  border-radius:8px;font-size:14px;outline:none}
label input:focus{border-color:#2f6fed}
form h3{margin:24px 0 12px;font-size:16px}
input[type=file]{margin:8px 0}

/* 按钮 */
.btn{display:inline-block;background:#2f6fed;color:#fff;border:none;padding:10px 22px;
  border-radius:8px;font-size:14px;cursor:pointer;font-weight:500}
.btn:hover{background:#2257c9;text-decoration:none}

.tip{color:#8a94a6;font-size:13px;margin-top:14px;background:#f0f4ff;
  border-left:3px solid #2f6fed;padding:10px 14px;border-radius:6px}
main h3{margin:28px 0 14px;font-size:16px}

/* 应用模块卡片 */
.mod-list{display:flex;flex-direction:column;gap:12px}
.mod-card{display:flex;align-items:center;gap:16px;background:#fff;border:1px solid #e9ecf1;
  border-radius:12px;padding:18px 20px;box-shadow:0 1px 3px rgba(0,0,0,.04)}
.mod-ic{width:46px;height:46px;border-radius:10px;background:#f0f4ff;display:flex;align-items:center;
  justify-content:center;font-size:24px;flex:none}
.mod-bd{flex:1;min-width:0}
.mod-t{font-size:15px;font-weight:600;color:#1f2329}
.mod-d{font-size:13px;color:#8a94a6;margin-top:4px}
.mod-acts{display:flex;gap:10px;flex:none}
.btn-s{display:inline-block;padding:8px 18px;border-radius:8px;font-size:13px;border:1px solid #dcdfe6;
  color:#4b5563;background:#fff;cursor:pointer}
.btn-s:hover{text-decoration:none;background:#f5f6f8}
.btn-s.primary{background:#2f6fed;border-color:#2f6fed;color:#fff}
.btn-s.primary:hover{background:#2257c9}
.btn-s.warn{color:#d83931;border-color:#f3c1c1}
.btn-s.warn:hover{background:#fdf3f3}
.tag{font-size:12px;padding:2px 8px;border-radius:999px;margin-left:8px;font-weight:400}
.tag.on{background:#e8f8ef;color:#07C160}
.tag.off{background:#fdecec;color:#d83931}
.upload-box{display:flex;align-items:center;gap:12px;background:#fff;border:1px dashed #c9d2e0;
  border-radius:12px;padding:14px 18px}
.up-lab{display:inline-block;margin:0;padding:9px 16px;border:1px solid #dcdfe6;border-radius:8px;
  font-size:13px;color:#4b5563;cursor:pointer;font-weight:400}
.up-lab:hover{border-color:#2f6fed;color:#2f6fed}
.up-name{color:#8a94a6;font-size:13px;flex:1;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.empty-box{background:#fff;border:1px dashed #dcdfe6;border-radius:12px;padding:28px;text-align:center;color:#aab2c0}
.err{color:#d83931;background:#fdeceb;padding:10px 14px;border-radius:6px;margin-bottom:14px;
  font-size:13px}
small{color:#8a94a6}