:root{
  --primary:#2563eb;--primary-dark:#1d4ed8;--ink:#0f172a;--muted:#64748b;
  --bg:#f1f5f9;--card:#fff;--border:#e2e8f0;--ok:#16a34a;--danger:#dc2626;
  --sidebar:#0f172a;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);line-height:1.6;font-size:14px}
a{text-decoration:none;color:inherit}

/* layout */
.layout{display:flex;min-height:100vh}
.sidebar{width:230px;background:var(--sidebar);color:#cbd5e1;display:flex;flex-direction:column;position:fixed;height:100vh;overflow-y:auto}
.logo{padding:22px 20px;border-bottom:1px solid rgba(255,255,255,.08)}
.logo-mark{color:#fff;font-weight:700;font-size:20px;display:block}
.logo-sub{font-size:12px;color:#94a3b8}
.nav{flex:1;padding:14px 0}
.nav a{display:block;padding:11px 22px;font-size:14px;color:#cbd5e1;border-left:3px solid transparent;transition:.15s}
.nav a:hover{background:rgba(255,255,255,.05);color:#fff}
.nav a.active{background:rgba(37,99,235,.18);color:#fff;border-left-color:var(--primary)}
.sidebar-footer{padding:14px 0;border-top:1px solid rgba(255,255,255,.08)}
.sidebar-footer a{display:block;padding:9px 22px;font-size:13px;color:#94a3b8}
.sidebar-footer a:hover{color:#fff}

.main{margin-left:230px;flex:1;min-width:0}
.topbar{background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--border);padding:13px 28px;display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:20}
.topbar-title{font-size:14px;font-weight:600;color:#64748b;display:flex;align-items:center;gap:8px}
.topbar-title::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--ok);box-shadow:0 0 0 3px rgba(22,163,74,.15)}
.topbar-user{display:flex;align-items:center;gap:18px;font-size:14px}
.balance{color:var(--ok);font-weight:600}
.uname{color:var(--muted)}
.content{padding:28px}

/* messages */
.messages{padding:14px 28px 0}
.msg{padding:11px 16px;border-radius:10px;margin-bottom:8px;font-size:14px}
.msg-success{background:#f0fdf4;color:#166534;border:1px solid #bbf7d0}
.msg-error{background:#fef2f2;color:#991b1b;border:1px solid #fecaca}
.msg-info{background:#eff6ff;color:#1e40af;border:1px solid #bfdbfe}

/* panels */
.panel{background:#fff;border:1px solid var(--border);border-radius:16px;padding:0;margin-bottom:20px;box-shadow:0 1px 2px rgba(15,23,42,.04);overflow:hidden}
/* 直接子元素自动获得左右内边距 (panel-head / table / panel-body 除外) */
.panel > *:not(.panel-head):not(.table):not(.panel-body):not(.panel-foot){
  margin-left:22px;margin-right:22px}
.panel > *:not(.panel-head):not(.table):not(.panel-body):not(.panel-foot):first-child{margin-top:22px}
.panel > *:not(.panel-head):not(.table):not(.panel-body):not(.panel-foot):last-child{margin-bottom:22px}
.panel-head{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;
  padding:17px 22px;margin:0;border-bottom:1px solid var(--border);background:#fbfcfe}
.panel-head h3{font-size:15px;font-weight:600;margin:0;display:flex;align-items:center;gap:9px}
.panel-body{padding:20px 22px}
.panel-foot{padding:14px 22px;border-top:1px solid var(--border);background:#fbfcfe}
.panel h3{font-size:16px;margin-bottom:12px}
.panel-form{max-width:760px}
.panel > .table{margin:0;width:100%}
.panel .table th:first-child,.panel .table td:first-child{padding-left:22px}
.panel .table th:last-child,.panel .table td:last-child{padding-right:22px}
.panel .empty{padding:38px 24px}

/* stat cards */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:20px}
@media(max-width:900px){.stat-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.stat-grid{grid-template-columns:1fr}}
.stat-card{position:relative;background:#fff;border:1px solid var(--border);border-radius:16px;padding:20px;
  box-shadow:0 1px 2px rgba(15,23,42,.04);overflow:hidden;transition:.18s}
.stat-card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--primary);opacity:.85}
.stat-card:hover{transform:translateY(-2px);box-shadow:0 8px 22px rgba(15,23,42,.08)}
.stat-card:nth-child(2)::before{background:#0ea5e9}
.stat-card:nth-child(3)::before{background:#16a34a}
.stat-card:nth-child(4)::before{background:#f59e0b}
.stat-label{color:var(--muted);font-size:13px;font-weight:500}
.stat-value{font-size:29px;font-weight:700;margin-top:8px;letter-spacing:.3px;line-height:1.1}
.stat-ok .stat-value{color:var(--ok)}
.stat-card.stat-ok::before{background:#16a34a}

/* tables */
.table{width:100%;border-collapse:collapse;font-size:14px}
.table th{text-align:left;padding:12px 12px;color:#64748b;font-weight:600;font-size:12.5px;
  text-transform:none;letter-spacing:.2px;border-bottom:1px solid var(--border);background:#fbfcfe;white-space:nowrap}
.table td{padding:13px 12px;border-bottom:1px solid #f1f5f9;vertical-align:middle}
.table tbody tr:last-child td{border-bottom:none}
.table tr:hover td{background:#f8fafc}
.table .actions{white-space:nowrap}
.table a{color:var(--primary);font-weight:500;text-decoration:none}
.table a:hover{text-decoration:underline}
.kv{width:100%;font-size:14px}
.kv th{text-align:left;padding:10px 0;color:var(--muted);width:150px;font-weight:500;vertical-align:top}
.kv td{padding:10px 0;border-bottom:1px solid var(--border)}
.kv-line{display:flex;justify-content:space-between;padding:10px 0;border-bottom:1px solid var(--border);font-size:14px}
.kv-line span{color:var(--muted)}
.tag{display:inline-block;padding:2px 8px;border-radius:6px;font-size:12px;margin-left:8px;font-weight:500}
.tag-ok{background:#dcfce7;color:#15803d}
.tag-warn{background:#fef3c7;color:#b45309}

/* badges */
.badge{display:inline-block;padding:3px 10px;border-radius:20px;font-size:12px;background:#f1f5f9;color:#475569}
.badge-tcp{background:#eff6ff;color:#1d4ed8}
.badge-udp{background:#fef3c7;color:#b45309}
.badge-http{background:#f0fdf4;color:#15803d}
.badge-https{background:#f5f3ff;color:#6d28d9}
code{background:#f1f5f9;padding:2px 7px;border-radius:6px;font-size:13px;font-family:ui-monospace,Menlo,monospace}
code.copyable{cursor:pointer}
code.big-code{font-size:20px;padding:8px 16px}

/* buttons */
.btn{display:inline-block;padding:8px 16px;border-radius:9px;border:1px solid var(--border);background:#fff;cursor:pointer;font-size:14px;transition:.15s;color:var(--ink)}
.btn:hover{background:#f8fafc}
.btn-primary{background:var(--primary);color:#fff;border-color:var(--primary)}
.btn-primary:hover{background:var(--primary-dark)}
.btn-danger{color:var(--danger);border-color:#fecaca}
.btn-danger:hover{background:#fef2f2}
.btn-sm{padding:6px 13px;font-size:13px}
.btn-xs{padding:3px 10px;font-size:12px}
.btn-block{width:100%;text-align:center;padding:11px}
.btn-ok{color:var(--ok);border-color:#bbf7d0}
.btn-ok:hover{background:#f0fdf4}
.btn-def{color:var(--primary);border-color:#bfdbfe}
.btn-def:hover{background:#eff6ff}
.btn-warn{color:#b45309;border-color:#fde68a}
.btn-warn:hover{background:#fffbeb}
.badge-def{background:#eff6ff;color:#1d4ed8}

/* forms */
.form-row{display:flex;flex-direction:column;gap:6px;margin-bottom:16px}
.form-row label{font-size:13px;color:var(--muted);font-weight:500}
.form-row input,.form-row select,.form-row textarea{padding:10px 13px;border:1px solid var(--border);border-radius:9px;font-size:14px;font-family:inherit;background:#fff}
.form-row input:focus,.form-row select:focus,.form-row textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(37,99,235,.1)}
.inline-form{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.inline-form input{padding:10px 13px;border:1px solid var(--border);border-radius:9px;font-size:14px}
.fieldset{border:1px solid var(--border);border-radius:12px;padding:16px 18px;margin-bottom:18px}
.fieldset legend{padding:0 8px;color:var(--muted);font-size:13px}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.muted{color:var(--muted);font-size:13px}
.suffix{color:var(--muted)}

/* diagnose */
.diag-steps{display:flex;flex-direction:column;gap:14px;margin-bottom:22px}
.diag-step{display:flex;gap:14px;align-items:flex-start;padding:16px;border:1px solid var(--border);border-radius:12px}
.diag-icon{width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;color:#fff;flex-shrink:0}
.diag-icon.ok{background:var(--ok)}
.diag-icon.fail{background:var(--danger)}
.diag-icon.warn{background:#f59e0b}
.diag-name{font-weight:600}
.diag-msg{color:var(--muted);font-size:13px}
.tips{background:#f8fafc;border-radius:12px;padding:18px;margin-bottom:18px}
.tips h4{margin-bottom:8px}
.tips ul{margin-left:18px;color:var(--muted);font-size:13px}
.tips li{margin:6px 0}

/* level cards */
.level-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.level-card{border:1px solid var(--border);border-radius:14px;padding:22px}
.level-name{font-weight:600;margin-bottom:6px}
.level-price{font-size:30px;font-weight:700;margin-bottom:14px}
.level-price span{font-size:14px;color:var(--muted);font-weight:400}
.level-feat{list-style:none;margin-bottom:16px}
.level-feat li{padding:7px 0;color:var(--muted);font-size:13px;border-bottom:1px dashed var(--border)}
.empty{color:var(--muted);text-align:center;padding:38px 24px;font-size:14px;line-height:1.7}
.empty a{color:var(--primary);font-weight:500}
.token-line{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.text-ok{color:var(--ok)}
.text-danger{color:var(--danger)}

/* auth pages */
.auth-body{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#1e3a8a,#2563eb)}
.auth-card{background:#fff;border-radius:18px;padding:38px;width:100%;max-width:400px;box-shadow:0 30px 70px rgba(0,0,0,.2)}
.auth-logo{display:inline-block;background:var(--primary);color:#fff;padding:5px 13px;border-radius:10px;font-weight:700;margin-bottom:20px}
.auth-card h2{margin-bottom:22px;font-size:22px}
.auth-card .form-row input{padding:12px 15px}
.auth-links{display:flex;justify-content:space-between;margin-top:18px;font-size:13px}
.auth-links a{color:var(--primary)}
.code-row{display:flex;gap:8px}
.code-row input{flex:1;min-width:0}
.btn-code{white-space:nowrap;background:#eff6ff;color:var(--primary);border:1px solid var(--primary);border-radius:10px;padding:0 14px;font-size:13px;cursor:pointer;font-weight:600}
.btn-code:disabled{opacity:.55;cursor:not-allowed}
.agree-row{margin:6px 0 14px;font-size:13px;color:#64748b;line-height:1.6}
.agree-row label{display:flex;align-items:flex-start;gap:8px;cursor:pointer}
.agree-row input{margin-top:2px}
.agree-row a{color:var(--primary)}

/* 公告条 */
.notice-bar{padding:12px 28px 0}
.notice-bar-item{padding:11px 16px;border-radius:10px;margin-bottom:8px;font-size:14px;background:#eff6ff;color:#1e40af;border-left:4px solid var(--primary)}
.notice-bar-item.notice-warning{background:#fffbeb;color:#92400e;border-left-color:#f59e0b}
.notice-bar-item.notice-danger{background:#fef2f2;color:#991b1b;border-left-color:#dc2626}
.notice-bar-item.notice-success{background:#f0fdf4;color:#166534;border-left-color:var(--ok)}

/* 导航未读徽标 */
.nav-badge{background:#dc2626;color:#fff;font-size:11px;padding:1px 7px;border-radius:10px;margin-left:6px}

/* 顶栏消息铃铛 */
.bell{position:relative;font-size:18px;line-height:1;text-decoration:none}
.bell-dot{position:absolute;top:-6px;right:-10px;background:#dc2626;color:#fff;font-size:10px;padding:1px 5px;border-radius:9px;min-width:16px;text-align:center}

@media(max-width:1100px){.stat-grid{grid-template-columns:repeat(2,1fr)}.level-grid,.grid-2{grid-template-columns:1fr}}
@media(max-width:800px){
  .sidebar{width:64px}.logo-sub,.nav a{font-size:0;padding:15px 0;text-align:center}
  .nav a::first-letter{font-size:20px}.main{margin-left:64px}
  .panel{padding:16px;overflow-x:auto}
  table.data{min-width:560px}
  .form-row input,.form-row select,.form-row textarea{font-size:16px}
  .stat-grid{grid-template-columns:repeat(2,1fr);gap:12px}
  .page-head-inner{flex-direction:column;align-items:flex-start;gap:10px}
  .toolbar{flex-wrap:wrap;gap:8px}
}
@media(max-width:480px){
  .stat-grid{grid-template-columns:1fr}
  .main{padding:14px}
  .tunnel-card{flex-direction:column;align-items:flex-start}
}

/* ============ 页面标题条 (渐变 Hero) ============ */
.page-head{position:relative;overflow:hidden;display:flex;align-items:center;justify-content:space-between;gap:20px;
  margin:-28px -28px 24px;padding:26px 28px;flex-wrap:wrap;
  background:linear-gradient(120deg,#0f172a 0%,#1e293b 45%,#1e3a8a 100%);color:#fff}
.page-head::after{content:"";position:absolute;right:-60px;top:-60px;width:220px;height:220px;border-radius:50%;
  background:radial-gradient(circle,rgba(59,130,246,.35),transparent 70%)}
.page-head h2{font-size:21px;font-weight:700;letter-spacing:.3px;display:flex;align-items:center;gap:12px;color:#fff;position:relative;z-index:1}
.page-head .page-sub{color:#a5b4cf;font-size:13px;margin-top:6px;position:relative;z-index:1;max-width:680px}
.page-head .head-ico{width:40px;height:40px;border-radius:12px;background:rgba(59,130,246,.22);
  border:1px solid rgba(147,197,253,.3);display:inline-flex;align-items:center;justify-content:center;font-size:19px;flex-shrink:0}
.page-head .page-sub b{color:#fff}
.page-head .head-actions{position:relative;z-index:1;display:flex;gap:10px}
.page-head .btn-ghost{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.22);color:#fff;padding:9px 18px;border-radius:10px;font-size:13px;font-weight:600;cursor:pointer;transition:.15s}
.page-head .btn-ghost:hover{background:rgba(255,255,255,.2)}

/* ============ 双栏：左表单 + 右列表 ============ */
.split{display:grid;grid-template-columns:390px 1fr;gap:22px;align-items:start}
@media(max-width:980px){.split{grid-template-columns:1fr}}

/* ============ 卡片 ============ */
.card{background:#fff;border:1px solid var(--border);border-radius:16px;box-shadow:0 1px 2px rgba(15,23,42,.04);overflow:hidden}
.card-hd{padding:17px 22px;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:10px;background:#fbfcfe}
.card-hd h3{font-size:15px;font-weight:600;margin:0;display:flex;align-items:center;gap:8px}
.card-hd .card-ico{width:26px;height:26px;border-radius:8px;background:#eff6ff;color:var(--primary);display:inline-flex;align-items:center;justify-content:center;font-size:14px;font-weight:700}
.card-hd .card-count{margin-left:auto;font-size:12.5px;color:var(--muted);background:#f1f5f9;padding:3px 11px;border-radius:20px}
.card-bd{padding:22px}
.card-ft{padding:16px 22px;border-top:1px solid var(--border);background:#fbfcfe}

/* 表单字段 */
.field{margin-bottom:19px}
.field:last-child{margin-bottom:0}
.field > label{display:block;font-size:13px;font-weight:600;color:var(--ink);margin-bottom:8px}
.field .hint{font-size:12px;color:var(--muted);margin-top:7px;line-height:1.55}
.field input,.field select{width:100%;padding:11px 14px;border:1px solid var(--border);border-radius:10px;font-size:14px;font-family:inherit;background:#fff;color:var(--ink);transition:.15s}
.field input::placeholder{color:#9aa7b8}
.field input:focus,.field select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(37,99,235,.12)}
.field select{appearance:none;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2364748b' d='M6 8L2 4h8z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;padding-right:36px}
.field .req{color:var(--danger);margin-left:3px}
.btn-block-lg{width:100%;padding:12px;font-size:15px;font-weight:600;border-radius:10px}

/* 兼容旧 .form-grid */
.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px 20px}
.form-grid .form-actions{grid-column:1/-1}
.small{font-size:12px}
code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px;background:#f1f5f9;padding:1px 6px;border-radius:5px}
.panel-head h3{margin:0}
@media(max-width:700px){.form-grid{grid-template-columns:1fr}}
/* 状态圆点 (在线/离线) */
.dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:#94a3b8;margin-right:6px;vertical-align:middle}
.dot-on{background:var(--ok);box-shadow:0 0 0 3px rgba(22,163,74,.15)}
.dot-off{background:#cbd5e1}
/* ============ 主机卡片列表 ============ */
.host-list{display:flex;flex-direction:column;gap:12px}
.host-card{border:1px solid var(--border);border-radius:12px;padding:16px 18px;display:flex;align-items:center;gap:16px;transition:.15s;background:#fff}
.host-card:hover{border-color:#c7d2fe;box-shadow:0 4px 14px rgba(15,23,42,.06)}
.host-avatar{width:44px;height:44px;border-radius:11px;background:linear-gradient(135deg,#f0f9ff,#e0f2fe);color:#0284c7;display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0}
.host-main{flex:1;min-width:0}
.host-name{font-weight:600;font-size:15px;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.host-meta{margin-top:5px;font-size:12.5px;color:var(--muted);display:flex;gap:16px;flex-wrap:wrap}
.host-meta b{color:#475569;font-weight:500;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px}
.host-actions{display:flex;gap:8px;flex-shrink:0}
@media(max-width:560px){.host-card{flex-wrap:wrap}.host-actions{width:100%}}

/* ============ 空状态 ============ */
.empty-state{text-align:center;padding:46px 24px;color:var(--muted)}
.empty-art{width:78px;height:78px;margin:0 auto 16px;border-radius:22px;display:flex;align-items:center;justify-content:center;
  font-size:34px;background:linear-gradient(135deg,#f8fafc,#eef2f7);border:1px dashed #cbd5e1}
.empty-title{font-size:15px;font-weight:600;color:#475569;margin-bottom:6px}
.empty-desc{font-size:13px;color:var(--muted);max-width:340px;margin:0 auto;line-height:1.6}

/* ============ 创建行 / 筛选条 ============ */
.create-row,.filter-bar{display:flex;gap:12px;align-items:flex-end;flex-wrap:wrap}
.create-row .field input{height:42px}
.field > input,.field > select{margin:0}

/* ============ 下拉操作菜单 ============ */
.dropdown{position:relative;display:inline-block}
.dd-toggle{white-space:nowrap}
.dd-menu{display:none;position:absolute;right:0;top:calc(100% + 6px);min-width:184px;z-index:60;
  background:#fff;border:1px solid var(--border);border-radius:12px;padding:6px;
  box-shadow:0 12px 32px rgba(15,23,42,.14);text-align:left}
.dropdown.open .dd-menu{display:block;animation:ddIn .12s ease}
@keyframes ddIn{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}
.dd-menu form{margin:0;display:block}
.dd-item{display:block;width:100%;text-align:left;background:none;border:none;padding:9px 12px;border-radius:8px;
  font-size:13.5px;color:#334155;cursor:pointer;font-family:inherit;transition:.12s}
.dd-item:hover{background:#f1f5f9;color:var(--ink)}
.dd-danger{color:var(--danger)}
.dd-danger:hover{background:#fef2f2;color:var(--danger)}